// Copyright 2015-2021 The Khronos Group, Inc.
//
// SPDX-License-Identifier: CC-BY-4.0

[[renderpass]]
= Render Pass

<<drawing, Draw commands>> must: be recorded within a _render pass
instance_.
Each render pass instance defines a set of image resources, referred to as
_attachments_, used during rendering.

ifdef::VK_KHR_dynamic_rendering[]
[open,refpage='vkCmdBeginRenderingKHR',desc='Begin a dynamic render pass instance',type='protos']
--
To begin a render pass instance, call:

include::{generated}/api/protos/vkCmdBeginRenderingKHR.txt[]

  * pname:commandBuffer is the command buffer in which to record the
    command.
  * pname:pRenderingInfo is a pointer to a slink:VkRenderingInfoKHR
    structure specifying details of the render pass instance to begin.

After beginning a render pass instance, the command buffer is ready to
record <<drawing,draw commands>>.

If pname:pRenderingInfo->flags includes ename:VK_RENDERING_RESUMING_BIT_KHR
then this render pass is resumed from a render pass instance that has been
suspended earlier in <<synchronization-submission-order, submission order>>.

.Valid Usage
****
  * [[VUID-vkCmdBeginRenderingKHR-dynamicRendering-06446]]
    The <<features-dynamicRendering,pname:dynamicRendering>> feature must:
    be enabled
  * [[VUID-vkCmdBeginRenderingKHR-commandBuffer-06068]]
    If pname:commandBuffer is a secondary command buffer,
    pname:pRenderingInfo->flags must: not include
    ename:VK_RENDERING_CONTENTS_SECONDARY_COMMAND_BUFFERS_BIT_KHR
****

include::{generated}/validity/protos/vkCmdBeginRenderingKHR.txt[]
--

[open,refpage='VkRenderingInfoKHR',desc='Structure specifying render pass instance begin info',type='structs']
--
The sname:VkRenderingInfoKHR structure is defined as:

include::{generated}/api/structs/VkRenderingInfoKHR.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:flags is a bitmask of elink:VkRenderingFlagBitsKHR.
  * pname:renderArea is the render area that is affected by the render pass
    instance.
  * pname:layerCount is the number of layers rendered to in each attachment
    when pname:viewMask is `0`.
  * pname:viewMask is the view mask indicating the indices of attachment
    layers that will be rendered when it is not `0`.
  * pname:colorAttachmentCount is the number of elements in
    pname:pColorAttachments.
  * pname:pColorAttachments is a pointer to an array of
    pname:colorAttachmentCount slink:VkRenderingAttachmentInfoKHR structures
    describing any color attachments used.
  * pname:pDepthAttachment is a pointer to a
    slink:VkRenderingAttachmentInfoKHR structure describing a depth
    attachment.
  * pname:pStencilAttachment is a pointer to a
    slink:VkRenderingAttachmentInfoKHR structure describing a stencil
    attachment.

ifdef::VK_KHR_multiview,VK_VERSION_1_1[]
If pname:viewMask is not `0`, multiview is enabled.
endif::VK_KHR_multiview,VK_VERSION_1_1[]

ifdef::VK_KHR_device_group,VK_VERSION_1_1[]
If there is an instance of slink:VkDeviceGroupRenderPassBeginInfo included
in the pname:pNext chain and its pname:deviceCount member is not `0`, then
pname:renderArea is ignored, and the render area is defined per-device by
that structure.
endif::VK_KHR_device_group,VK_VERSION_1_1[]

Each element of the pname:pColorAttachments array corresponds to an output
location in the shader, i.e. if the shader declares an output variable
decorated with a code:Location value of *X*, then it uses the attachment
provided in pname:pColorAttachments[*X*].
If the pname:imageView member of any element of pname:pColorAttachments is
dlink:VK_NULL_HANDLE, writes to the corresponding location by a fragment are
discarded.

.Valid Usage
****
  * [[VUID-VkRenderingInfoKHR-viewMask-06069]]
    If pname:viewMask is `0`, pname:layerCount must: not be `0`
  * [[VUID-VkRenderingInfoKHR-imageView-06070]]
    If neither the apiext:VK_AMD_mixed_attachment_samples nor the
    apiext:VK_NV_framebuffer_mixed_samples extensions are enabled,
    pname:imageView members of pname:pDepthAttachment,
    pname:pStencilAttachment, and elements of pname:pColorAttachments that
    are not dlink:VK_NULL_HANDLE must: have been created with the same
    pname:sampleCount
ifndef::VK_VERSION_1_1,VK_KHR_device_group[]
  * [[VUID-VkRenderingInfoKHR-renderArea-06071]]
    pname:renderArea.offset.x must: be greater than or equal to 0
  * [[VUID-VkRenderingInfoKHR-renderArea-06072]]
    pname:renderArea.offset.y must: be greater than or equal to 0
  * [[VUID-VkRenderingInfoKHR-renderArea-06073]]
    The sum of pname:renderArea.offset.x and pname:renderArea.extent.width
    must: be less than or equal to <<limits-maxFramebufferWidth,
    pname:maxFramebufferWidth>>
  * [[VUID-VkRenderingInfoKHR-renderArea-06074]]
    The sum of pname:renderArea.offset.y and pname:renderArea.extent.height
    must: be less than or equal to <<limits-maxFramebufferHeight,
    pname:maxFramebufferHeight>>
  * [[VUID-VkRenderingInfoKHR-imageView-06075]]
    The width of the pname:imageView member of any element of
    pname:pColorAttachments, pname:pDepthAttachment, or
    pname:pStencilAttachment that is not dlink:VK_NULL_HANDLE must: be
    greater than or equal to [eq]#pname:renderArea.offset.x {plus}
    pname:renderArea.extent.width#
  * [[VUID-VkRenderingInfoKHR-imageView-06076]]
    The height of the pname:imageView member of any element of
    pname:pColorAttachments, pname:pDepthAttachment, or
    pname:pStencilAttachment that is not dlink:VK_NULL_HANDLE must: be
    greater than or equal to [eq]#pname:renderArea.offset.y {plus}
    pname:renderArea.extent.height#
endif::VK_VERSION_1_1,VK_KHR_device_group[]
ifdef::VK_VERSION_1_1,VK_KHR_device_group[]
  * [[VUID-VkRenderingInfoKHR-pNext-06077]]
    If the pname:pNext chain does not contain
    slink:VkDeviceGroupRenderPassBeginInfo or its
    pname:deviceRenderAreaCount member is equal to 0,
    pname:renderArea.offset.x must: be greater than or equal to 0
  * [[VUID-VkRenderingInfoKHR-pNext-06078]]
    If the pname:pNext chain does not contain
    slink:VkDeviceGroupRenderPassBeginInfo or its
    pname:deviceRenderAreaCount member is equal to 0,
    pname:renderArea.offset.y must: be greater than or equal to 0
  * [[VUID-VkRenderingInfoKHR-pNext-06079]]
    If the pname:pNext chain does not contain
    slink:VkDeviceGroupRenderPassBeginInfo or its
    pname:deviceRenderAreaCount member is equal to 0, the width of the
    pname:imageView member of any element of pname:pColorAttachments,
    pname:pDepthAttachment, or pname:pStencilAttachment that is not
    dlink:VK_NULL_HANDLE must: be greater than or equal to
    [eq]#pname:renderArea.offset.x {plus} pname:renderArea.extent.width#
  * [[VUID-VkRenderingInfoKHR-pNext-06080]]
    If the pname:pNext chain does not contain
    slink:VkDeviceGroupRenderPassBeginInfo or its
    pname:deviceRenderAreaCount member is equal to 0, the height of the
    pname:imageView member of any element of pname:pColorAttachments,
    pname:pDepthAttachment, or pname:pStencilAttachment that is not
    dlink:VK_NULL_HANDLE must: be greater than or equal to
    [eq]#pname:renderArea.offset.y {plus} pname:renderArea.extent.height#
  * [[VUID-VkRenderingInfoKHR-pNext-06081]]
    If the pname:pNext chain contains
    slink:VkDeviceGroupRenderPassBeginInfo, the pname:offset.x member of
    each element of pname:pDeviceRenderAreas must: be greater than or equal
    to 0
  * [[VUID-VkRenderingInfoKHR-pNext-06082]]
    If the pname:pNext chain contains
    slink:VkDeviceGroupRenderPassBeginInfo, the pname:offset.y member of
    each element of pname:pDeviceRenderAreas must: be greater than or equal
    to 0
  * [[VUID-VkRenderingInfoKHR-pNext-06083]]
    If the pname:pNext chain contains
    slink:VkDeviceGroupRenderPassBeginInfo, the width of the pname:imageView
    member of any element of pname:pColorAttachments,
    pname:pDepthAttachment, or pname:pStencilAttachment that is not
    dlink:VK_NULL_HANDLE must: be greater than or equal to the sum of the
    pname:offset.x and pname:extent.width members of each element of
    pname:pDeviceRenderAreas
  * [[VUID-VkRenderingInfoKHR-pNext-06084]]
    If the pname:pNext chain contains
    slink:VkDeviceGroupRenderPassBeginInfo, the height of the
    pname:imageView member of any element of pname:pColorAttachments,
    pname:pDepthAttachment, or pname:pStencilAttachment that is not
    dlink:VK_NULL_HANDLE must: be greater than or equal to the sum of the
    pname:offset.y and pname:extent.height members of each element of
    pname:pDeviceRenderAreas
  * [[VUID-VkRenderingInfoKHR-pDepthAttachment-06085]]
    If neither pname:pDepthAttachment or pname:pStencilAttachment are `NULL`
    and the pname:imageView member of either structure is not
    dlink:VK_NULL_HANDLE, the pname:imageView member of each structure must:
    be the same
  * [[VUID-VkRenderingInfoKHR-pDepthAttachment-06086]]
    If neither pname:pDepthAttachment or pname:pStencilAttachment are
    `NULL`, and the pname:resolveMode member of each is not
    ename:VK_RESOLVE_MODE_NONE, the pname:resolveImageView member of each
    structure must: be the same
endif::VK_VERSION_1_1,VK_KHR_device_group[]
  * [[VUID-VkRenderingInfoKHR-colorAttachmentCount-06087]]
    If pname:colorAttachmentCount is not `0` and the pname:imageView member
    of an element of pname:pColorAttachments is not dlink:VK_NULL_HANDLE,
    that pname:imageView must: have been created with
    ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT
  * [[VUID-VkRenderingInfoKHR-pDepthAttachment-06088]]
    If pname:pDepthAttachment is not `NULL` and
    pname:pDepthAttachment->imageView is not dlink:VK_NULL_HANDLE,
    pname:pDepthAttachment->imageView must: have been created with
    ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT
  * [[VUID-VkRenderingInfoKHR-pStencilAttachment-06089]]
    If pname:pStencilAttachment is not `NULL` and
    pname:pStencilAttachment->imageView is not dlink:VK_NULL_HANDLE,
    pname:pStencilAttachment->imageView must: have been created with a
    stencil usage including
    ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT
  * [[VUID-VkRenderingInfoKHR-colorAttachmentCount-06090]]
    If pname:colorAttachmentCount is not `0` and the pname:imageView member
    of an element of pname:pColorAttachments is not dlink:VK_NULL_HANDLE,
    the pname:layout member of that element of pname:pColorAttachments must:
    not be ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkRenderingInfoKHR-colorAttachmentCount-06091]]
    If pname:colorAttachmentCount is not `0` and the pname:imageView member
    of an element of pname:pColorAttachments is not dlink:VK_NULL_HANDLE, if
    the pname:resolveMode member of that element of pname:pColorAttachments
    is not ename:VK_RESOLVE_MODE_NONE, its pname:resolveImageLayout member
    must: not be ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkRenderingInfoKHR-pDepthAttachment-06092]]
    If pname:pDepthAttachment is not `NULL` and
    pname:pDepthAttachment->imageView is not dlink:VK_NULL_HANDLE,
    pname:pDepthAttachment->layout must: not be
    ename:VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL
  * [[VUID-VkRenderingInfoKHR-pDepthAttachment-06093]]
    If pname:pDepthAttachment is not `NULL`,
    pname:pDepthAttachment->imageView is not dlink:VK_NULL_HANDLE, and
    pname:pDepthAttachment->resolveMode is not ename:VK_RESOLVE_MODE_NONE,
    pname:pDepthAttachment->resolveImageLayout must: not be
    ename:VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL
  * [[VUID-VkRenderingInfoKHR-pStencilAttachment-06094]]
    If pname:pStencilAttachment is not `NULL` and
    pname:pStencilAttachment->imageView is not dlink:VK_NULL_HANDLE,
    pname:pStencilAttachment->layout must: not be
    ename:VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL
  * [[VUID-VkRenderingInfoKHR-pStencilAttachment-06095]]
    If pname:pStencilAttachment is not `NULL`,
    pname:pStencilAttachment->imageView is not dlink:VK_NULL_HANDLE, and
    pname:pStencilAttachment->resolveMode is not ename:VK_RESOLVE_MODE_NONE,
    pname:pStencilAttachment->resolveImageLayout must: not be
    ename:VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL
ifdef::VK_KHR_maintenance2,VK_VERSION_1_1[]
  * [[VUID-VkRenderingInfoKHR-colorAttachmentCount-06096]]
    If pname:colorAttachmentCount is not `0` and the pname:imageView member
    of an element of pname:pColorAttachments is not dlink:VK_NULL_HANDLE,
    the pname:layout member of that element of pname:pColorAttachments must:
    not be ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL
    or ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkRenderingInfoKHR-colorAttachmentCount-06097]]
    If pname:colorAttachmentCount is not `0` and the pname:imageView member
    of an element of pname:pColorAttachments is not dlink:VK_NULL_HANDLE, if
    the pname:resolveMode member of that element of pname:pColorAttachments
    is not ename:VK_RESOLVE_MODE_NONE, its pname:resolveImageLayout member
    must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkRenderingInfoKHR-pDepthAttachment-06098]]
    If pname:pDepthAttachment is not `NULL`,
    pname:pDepthAttachment->imageView is not dlink:VK_NULL_HANDLE, and
    pname:pDepthAttachment->resolveMode is not ename:VK_RESOLVE_MODE_NONE,
    pname:pDepthAttachment->resolveImageLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL
  * [[VUID-VkRenderingInfoKHR-pStencilAttachment-06099]]
    If pname:pStencilAttachment is not `NULL`,
    pname:pStencilAttachment->imageView is not dlink:VK_NULL_HANDLE, and
    pname:pStencilAttachment->resolveMode is not ename:VK_RESOLVE_MODE_NONE,
    pname:pStencilAttachment->resolveImageLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL
endif::VK_KHR_maintenance2,VK_VERSION_1_1[]
ifdef::VK_KHR_separate_depth_stencil_layouts,VK_VERSION_1_2[]
  * [[VUID-VkRenderingInfoKHR-colorAttachmentCount-06100]]
    If pname:colorAttachmentCount is not `0` and the pname:imageView member
    of an element of pname:pColorAttachments is not dlink:VK_NULL_HANDLE,
    the pname:layout member of that element of pname:pColorAttachments must:
    not be ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkRenderingInfoKHR-colorAttachmentCount-06101]]
    If pname:colorAttachmentCount is not `0` and the pname:imageView member
    of an element of pname:pColorAttachments is not dlink:VK_NULL_HANDLE, if
    the pname:resolveMode member of that element of pname:pColorAttachments
    is not ename:VK_RESOLVE_MODE_NONE, its pname:resolveImageLayout member
    must: not be ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
endif::VK_KHR_separate_depth_stencil_layouts,VK_VERSION_1_2[]
ifdef::VK_KHR_depth_stencil_resolve,VK_VERSION_1_2[]
  * [[VUID-VkRenderingInfoKHR-pDepthAttachment-06102]]
    If pname:pDepthAttachment is not `NULL` and
    pname:pDepthAttachment->imageView is not dlink:VK_NULL_HANDLE,
    pname:pDepthAttachment->resolveMode must: be one of the bits set in
    slink:VkPhysicalDeviceDepthStencilResolveProperties::pname:supportedDepthResolveModes
  * [[VUID-VkRenderingInfoKHR-pStencilAttachment-06103]]
    If pname:pStencilAttachment is not `NULL` and
    pname:pStencilAttachment->imageView is not dlink:VK_NULL_HANDLE,
    pname:pStencilAttachment->resolveMode must: be one of the bits set in
    slink:VkPhysicalDeviceDepthStencilResolveProperties::pname:supportedStencilResolveModes
  * [[VUID-VkRenderingInfoKHR-pDepthAttachment-06104]]
    If pname:pDepthAttachment or pname:pStencilAttachment are both not
    `NULL`, pname:pDepthAttachment->imageView and
    pname:pStencilAttachment->imageView are both not dlink:VK_NULL_HANDLE,
    and
    slink:VkPhysicalDeviceDepthStencilResolveProperties::pname:independentResolveNone
    is ename:VK_FALSE, the pname:resolveMode of both structures must: be the
    same value
  * [[VUID-VkRenderingInfoKHR-pDepthAttachment-06105]]
    If pname:pDepthAttachment or pname:pStencilAttachment are both not
    `NULL`, pname:pDepthAttachment->imageView and
    pname:pStencilAttachment->imageView are both not dlink:VK_NULL_HANDLE,
    slink:VkPhysicalDeviceDepthStencilResolveProperties::pname:independentResolve
    is ename:VK_FALSE, and the pname:resolveMode of neither structure is
    ename:VK_RESOLVE_MODE_NONE, the pname:resolveMode of both structures
    must: be the same value
endif::VK_KHR_depth_stencil_resolve,VK_VERSION_1_2[]
  * [[VUID-VkRenderingInfoKHR-colorAttachmentCount-06106]]
    pname:colorAttachmentCount must: be less than or equal to
    slink:VkPhysicalDeviceLimits::pname:maxColorAttachments
ifdef::VK_EXT_fragment_density_map[]
  * [[VUID-VkRenderingInfoKHR-imageView-06107]]
    If the pname:imageView member of a
    slink:VkRenderingFragmentDensityMapAttachmentInfoEXT structure included
    in the pname:pNext chain is not dlink:VK_NULL_HANDLE, and
    <<features-fragmentDensityMapNonSubsampledImages,non-subsample image
    feature>> is not enabled, valid pname:imageView and
    pname:resolveImageView members of pname:pDepthAttachment,
    pname:pStencilAttachment, and each element of pname:pColorAttachments
    must: be a slink:VkImageView created with
    ename:VK_IMAGE_CREATE_SUBSAMPLED_BIT_EXT
ifdef::VK_VERSION_1_1,VK_KHR_multiview[]
  * [[VUID-VkRenderingInfoKHR-imageView-06108]]
    If the pname:imageView member of a
    slink:VkRenderingFragmentDensityMapAttachmentInfoEXT structure included
    in the pname:pNext chain is not dlink:VK_NULL_HANDLE, and pname:viewMask
    is not `0`, pname:imageView must: have a pname:layerCount greater than
    or equal to the index of the most significant bit in pname:viewMask
  * [[VUID-VkRenderingInfoKHR-imageView-06109]]
    If the pname:imageView member of a
    slink:VkRenderingFragmentDensityMapAttachmentInfoEXT structure included
    in the pname:pNext chain is not dlink:VK_NULL_HANDLE, and pname:viewMask
    is `0`, pname:imageView must: have a pname:layerCount equal to `1`
endif::VK_VERSION_1_1,VK_KHR_multiview[]
ifndef::VK_VERSION_1_1,VK_KHR_device_group[]
  * [[VUID-VkRenderingInfoKHR-imageView-06110]]
    If the pname:imageView member of a
    slink:VkRenderingFragmentDensityMapAttachmentInfoEXT structure included
    in the pname:pNext chain is not dlink:VK_NULL_HANDLE, pname:imageView
    must: have a width greater than or equal to
    latexmath:[\left\lceil{\frac{renderArea_{x}+renderArea_{width}}{maxFragmentDensityTexelSize_{width}}}\right\rceil]
  * [[VUID-VkRenderingInfoKHR-imageView-06111]]
    If the pname:imageView member of a
    slink:VkRenderingFragmentDensityMapAttachmentInfoEXT structure included
    in the pname:pNext chain is not dlink:VK_NULL_HANDLE, pname:imageView
    must: have a height greater than or equal to
    latexmath:[\left\lceil{\frac{renderArea_{y}+renderArea_{height}}{maxFragmentDensityTexelSize_{height}}}\right\rceil]
endif::VK_VERSION_1_1,VK_KHR_device_group[]
ifdef::VK_VERSION_1_1,VK_KHR_device_group[]
  * [[VUID-VkRenderingInfoKHR-pNext-06112]]
    If the pname:pNext chain does not contain
    slink:VkDeviceGroupRenderPassBeginInfo or its
    pname:deviceRenderAreaCount member is equal to 0 and the pname:imageView
    member of a slink:VkRenderingFragmentDensityMapAttachmentInfoEXT
    structure included in the pname:pNext chain is not dlink:VK_NULL_HANDLE,
    pname:imageView must: have a width greater than or equal to
    latexmath:[\left\lceil{\frac{renderArea_{x}+renderArea_{width}}{maxFragmentDensityTexelSize_{width}}}\right\rceil]
  * [[VUID-VkRenderingInfoKHR-pNext-06113]]
    If the pname:pNext chain contains a
    slink:VkDeviceGroupRenderPassBeginInfo structure, its
    pname:deviceRenderAreaCount member is not 0, and the pname:imageView
    member of a slink:VkRenderingFragmentDensityMapAttachmentInfoEXT
    structure included in the pname:pNext chain is not dlink:VK_NULL_HANDLE,
    pname:imageView must: have a width greater than or equal to
    latexmath:[\left\lceil{\frac{pDeviceRenderAreas_{x}+pDeviceRenderAreas_{width}}{maxFragmentDensityTexelSize_{width}}}\right\rceil]
    for each element of pname:pDeviceRenderAreas
  * [[VUID-VkRenderingInfoKHR-pNext-06114]]
    If the pname:pNext chain does not contain
    slink:VkDeviceGroupRenderPassBeginInfo or its
    pname:deviceRenderAreaCount member is equal to 0 and the pname:imageView
    member of a slink:VkRenderingFragmentDensityMapAttachmentInfoEXT
    structure included in the pname:pNext chain is not dlink:VK_NULL_HANDLE,
    pname:imageView must: have a height greater than or equal to
    latexmath:[\left\lceil{\frac{renderArea_{y}+renderArea_{height}}{maxFragmentDensityTexelSize_{height}}}\right\rceil]
  * [[VUID-VkRenderingInfoKHR-pNext-06115]]
    If the pname:pNext chain contains a
    slink:VkDeviceGroupRenderPassBeginInfo structure, its
    pname:deviceRenderAreaCount member is not 0, and the pname:imageView
    member of a slink:VkRenderingFragmentDensityMapAttachmentInfoEXT
    structure included in the pname:pNext chain is not dlink:VK_NULL_HANDLE,
    pname:imageView must: have a height greater than or equal to
    latexmath:[\left\lceil{\frac{pDeviceRenderAreas_{y}+pDeviceRenderAreas_{height}}{maxFragmentDensityTexelSize_{height}}}\right\rceil]
    for each element of pname:pDeviceRenderAreas
endif::VK_VERSION_1_1,VK_KHR_device_group[]
  * [[VUID-VkRenderingInfoKHR-imageView-06116]]
    If the pname:imageView member of a
    slink:VkRenderingFragmentDensityMapAttachmentInfoEXT structure included
    in the pname:pNext chain is not dlink:VK_NULL_HANDLE, it must: not be
    equal to the pname:imageView or pname:resolveImageView member of
    pname:pDepthAttachment, pname:pStencilAttachment, or any element of
    pname:pColorAttachments
endif::VK_EXT_fragment_density_map[]
ifdef::VK_KHR_fragment_shading_rate[]
ifndef::VK_VERSION_1_1,VK_KHR_device_group[]
  * [[VUID-VkRenderingInfoKHR-imageView-06117]]
    If the pname:imageView member of a
    slink:VkRenderingFragmentShadingRateAttachmentInfoKHR structure included
    in the pname:pNext chain is not dlink:VK_NULL_HANDLE, pname:imageView
    must: have a width greater than or equal to
    latexmath:[\left\lceil{\frac{renderArea_{x}+renderArea_{width}}{shadingRateAttachmentTexelSize_{width}}}\right\rceil]
  * [[VUID-VkRenderingInfoKHR-imageView-06118]]
    If the pname:imageView member of a
    slink:VkRenderingFragmentShadingRateAttachmentInfoKHR structure included
    in the pname:pNext chain is not dlink:VK_NULL_HANDLE, pname:imageView
    must: have a height greater than or equal to
    latexmath:[\left\lceil{\frac{renderArea_{y}+renderArea_{height}}{shadingRateAttachmentTexelSize_{height}}}\right\rceil]
endif::VK_VERSION_1_1,VK_KHR_device_group[]
ifdef::VK_VERSION_1_1,VK_KHR_device_group[]
  * [[VUID-VkRenderingInfoKHR-pNext-06119]]
    If the pname:pNext chain does not contain
    slink:VkDeviceGroupRenderPassBeginInfo or its
    pname:deviceRenderAreaCount member is equal to 0 and the pname:imageView
    member of a slink:VkRenderingFragmentShadingRateAttachmentInfoKHR
    structure included in the pname:pNext chain is not dlink:VK_NULL_HANDLE,
    pname:imageView must: have a width greater than or equal to
    latexmath:[\left\lceil{\frac{renderArea_{x}+renderArea_{width}}{shadingRateAttachmentTexelSize_{width}}}\right\rceil]
  * [[VUID-VkRenderingInfoKHR-pNext-06120]]
    If the pname:pNext chain contains a
    slink:VkDeviceGroupRenderPassBeginInfo structure, its
    pname:deviceRenderAreaCount member is not 0, and the pname:imageView
    member of a slink:VkRenderingFragmentShadingRateAttachmentInfoKHR
    structure included in the pname:pNext chain is not dlink:VK_NULL_HANDLE,
    pname:imageView must: have a width greater than or equal to
    latexmath:[\left\lceil{\frac{pDeviceRenderAreas_{x}+pDeviceRenderAreas_{width}}{shadingRateAttachmentTexelSize_{width}}}\right\rceil]
    for each element of pname:pDeviceRenderAreas
  * [[VUID-VkRenderingInfoKHR-pNext-06121]]
    If the pname:pNext chain does not contain
    slink:VkDeviceGroupRenderPassBeginInfo or its
    pname:deviceRenderAreaCount member is equal to 0 and the pname:imageView
    member of a slink:VkRenderingFragmentShadingRateAttachmentInfoKHR
    structure included in the pname:pNext chain is not dlink:VK_NULL_HANDLE,
    pname:imageView must: have a height greater than or equal to
    latexmath:[\left\lceil{\frac{renderArea_{y}+renderArea_{height}}{shadingRateAttachmentTexelSize_{height}}}\right\rceil]
  * [[VUID-VkRenderingInfoKHR-pNext-06122]]
    If the pname:pNext chain contains a
    slink:VkDeviceGroupRenderPassBeginInfo structure, its
    pname:deviceRenderAreaCount member is not 0, and the pname:imageView
    member of a slink:VkRenderingFragmentShadingRateAttachmentInfoKHR
    structure included in the pname:pNext chain is not dlink:VK_NULL_HANDLE,
    pname:imageView must: have a height greater than or equal to
    latexmath:[\left\lceil{\frac{pDeviceRenderAreas_{y}+pDeviceRenderAreas_{height}}{shadingRateAttachmentTexelSize_{height}}}\right\rceil]
    for each element of pname:pDeviceRenderAreas
endif::VK_VERSION_1_1,VK_KHR_device_group[]
  * [[VUID-VkRenderingInfoKHR-imageView-06123]]
    If the pname:imageView member of a
    slink:VkRenderingFragmentShadingRateAttachmentInfoKHR structure included
    in the pname:pNext chain is not dlink:VK_NULL_HANDLE, and pname:viewMask
    is `0`, pname:imageView must: have a pname:layerCount that is either
    equal to `1` or greater than or equal to pname:layerCount
  * [[VUID-VkRenderingInfoKHR-imageView-06124]]
    If the pname:imageView member of a
    slink:VkRenderingFragmentShadingRateAttachmentInfoKHR structure included
    in the pname:pNext chain is not dlink:VK_NULL_HANDLE, and pname:viewMask
    is not `0`, pname:imageView must: have a pname:layerCount that either
    equal to `1` or greater than or equal to the index of the most
    significant bit in pname:viewMask
  * [[VUID-VkRenderingInfoKHR-imageView-06125]]
    If the pname:imageView member of a
    slink:VkRenderingFragmentShadingRateAttachmentInfoKHR structure included
    in the pname:pNext chain is not dlink:VK_NULL_HANDLE, it must: not be
    equal to the pname:imageView or pname:resolveImageView member of
    pname:pDepthAttachment, pname:pStencilAttachment, or any element of
    pname:pColorAttachments
ifdef::VK_EXT_fragment_density_map[]
  * [[VUID-VkRenderingInfoKHR-imageView-06126]]
    If the pname:imageView member of a
    slink:VkRenderingFragmentShadingRateAttachmentInfoKHR structure included
    in the pname:pNext chain is not dlink:VK_NULL_HANDLE, it must: not be
    equal to the pname:imageView member of a
    slink:VkRenderingFragmentDensityMapAttachmentInfoEXT structure included
    in the pname:pNext chain
endif::VK_EXT_fragment_density_map[]
endif::VK_KHR_fragment_shading_rate[]
  * [[VUID-VkRenderingInfoKHR-multiview-06127]]
    If the <<features-multiview,pname:multiview>> feature is not enabled,
    pname:viewMask must: be `0`
ifdef::VK_VERSION_1_1,VK_KHR_multiview[]
  * [[VUID-VkRenderingInfoKHR-viewMask-06128]]
    The index of the most significant bit in pname:viewMask must: be less
    than <<limits-maxMultiviewViewCount,pname:maxMultiviewViewCount>>
endif::VK_VERSION_1_1,VK_KHR_multiview[]
****

include::{generated}/validity/structs/VkRenderingInfoKHR.txt[]
--

[open,refpage='VkRenderingFlagBitsKHR',desc='Bitmask specifying additional properties of a dynamic render pass instance',type='enums']
--
Bits which can: be set in slink:VkRenderingInfoKHR::pname:flags describing
additional properties of the render pass are:

include::{generated}/api/enums/VkRenderingFlagBitsKHR.txt[]

  * ename:VK_RENDERING_CONTENTS_SECONDARY_COMMAND_BUFFERS_BIT_KHR specifies
    that draw calls for the render pass instance will be recorded in
    secondary command buffers.
  * ename:VK_RENDERING_RESUMING_BIT_KHR specifies that the render pass
    instance is resuming an earlier suspended render pass instance.
  * ename:VK_RENDERING_SUSPENDING_BIT_KHR specifies that the render pass
    instance will be suspended.

[[renderpass-suspension]]
The contents of pname:pRenderingInfo must: match between suspended render
pass instances and the render pass instances that resume them, other than
the presence or absence of the ename:VK_RENDERING_RESUMING_BIT_KHR,
ename:VK_RENDERING_SUSPENDING_BIT_KHR, and
ename:VK_RENDERING_CONTENTS_SECONDARY_COMMAND_BUFFERS_BIT_KHR flags.
No action or synchronization commands, or other render pass instances, are
allowed between suspending and resuming render pass instances.
--

[open,refpage='VkRenderingFlagsKHR',desc='Bitmask of VkRenderingFlagBitsKHR',type='flags']
--
include::{generated}/api/flags/VkRenderingFlagsKHR.txt[]

tname:VkRenderingFlagsKHR is a bitmask type for setting a mask of zero or
more elink:VkRenderingFlagBitsKHR.
--

[open,refpage='VkRenderingAttachmentInfoKHR',desc='Structure specifying attachment information',type='structs']
--
The sname:VkRenderingAttachmentInfoKHR structure is defined as:

include::{generated}/api/structs/VkRenderingAttachmentInfoKHR.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:imageView is the image view that will be used for rendering.
  * pname:imageLayout is the layout that pname:imageView will be in during
    rendering.
  * pname:resolveMode is a elink:VkResolveModeFlagBits value defining how
    multisampled data written to pname:imageView will be resolved.
  * pname:resolveImageView is an image view used to write resolved
    multisample data at the end of rendering.
  * pname:resolveImageLayout is the layout that pname:resolveImageView will
    be in during rendering.
  * pname:loadOp is a elink:VkAttachmentLoadOp value specifying how the
    contents of pname:imageView are treated at the start of the render pass
    instance.
  * pname:storeOp is a elink:VkAttachmentStoreOp value specifying how the
    contents of pname:imageView are treated at the end of the render pass
    instance.
  * pname:clearValue is a slink:VkClearValue structure that defines values
    used to clear pname:imageView when pname:loadOp is
    ename:VK_ATTACHMENT_LOAD_OP_CLEAR.

Values in pname:imageView are loaded and stored according to the values of
pname:loadOp and pname:storeOp, within the render area
ifdef::VK_VERSION_1_1,VK_KHR_device_group[]
for each device
endif::VK_VERSION_1_1,VK_KHR_device_group[]
specified in slink:VkRenderingInfoKHR.
If pname:imageView is dlink:VK_NULL_HANDLE, other members of this structure
are ignored; writes to this attachment will be discarded, and no load,
store, or resolve operations will be performed.

If pname:resolveMode is ename:VK_RESOLVE_MODE_NONE, then
pname:resolveImageView is ignored.
If pname:resolveMode is not ename:VK_RESOLVE_MODE_NONE, values in
pname:resolveImageView within the render area become undefined: once
rendering begins.
At the end of rendering, the color values written to each pixel location in
pname:imageView will be resolved according to pname:resolveMode and stored
into the the same location in pname:resolveImageView.

[NOTE]
.Note
====
The resolve mode and store operation are independent; it is valid to write
both resolved and unresolved values, and equally valid to discard the
unresolved values while writing the resolved ones.
====

Store and resolve operations are only performed at the end of a render pass
instance that does not specify the ename:VK_RENDERING_SUSPENDING_BIT_KHR
flag.

Load operations are only performed at the beginning of a render pass
instance that does not specify the ename:VK_RENDERING_RESUMING_BIT_KHR flag.

Image contents at the end of a suspended render pass instance remain defined
for access by a resuming render pass instance.

.Valid Usage
****
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06129]]
    If pname:imageView is not dlink:VK_NULL_HANDLE and has a non-integer
    color format, pname:resolveMode must: be ename:VK_RESOLVE_MODE_NONE or
    ename:VK_RESOLVE_MODE_AVERAGE_BIT
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06130]]
    If pname:imageView is not dlink:VK_NULL_HANDLE and has an integer color
    format, pname:resolveMode must: be ename:VK_RESOLVE_MODE_NONE or
    ename:VK_RESOLVE_MODE_SAMPLE_ZERO_BIT
ifndef::VK_KHR_depth_stencil_resolve,VK_VERSION_1_2[]
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06131]]
    If pname:imageView is not dlink:VK_NULL_HANDLE and has a depth or
    stencil format, pname:resolveMode must: be ename:VK_RESOLVE_MODE_NONE
endif::VK_KHR_depth_stencil_resolve,VK_VERSION_1_2[]
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06132]]
    If pname:imageView is not dlink:VK_NULL_HANDLE and pname:resolveMode is
    not ename:VK_RESOLVE_MODE_NONE, pname:imageView must: not have a sample
    count of ename:VK_SAMPLE_COUNT_1_BIT
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06133]]
    If pname:imageView is not dlink:VK_NULL_HANDLE and pname:resolveMode is
    not ename:VK_RESOLVE_MODE_NONE, pname:resolveImageView must: have a
    sample count of ename:VK_SAMPLE_COUNT_1_BIT
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06134]]
    If pname:imageView is not dlink:VK_NULL_HANDLE and pname:resolveMode is
    not ename:VK_RESOLVE_MODE_NONE, pname:imageView and
    pname:resolveImageView must: have the same elink:VkFormat
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06135]]
    If pname:imageView is not dlink:VK_NULL_HANDLE, pname:layout must: not
    be ename:VK_IMAGE_LAYOUT_UNDEFINED,
    ename:VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_PREINITIALIZED
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06136]]
    If pname:imageView is not dlink:VK_NULL_HANDLE and pname:resolveMode is
    not ename:VK_RESOLVE_MODE_NONE, pname:resolveImageLayout must: not be
    ename:VK_IMAGE_LAYOUT_UNDEFINED,
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_PREINITIALIZED
ifdef::VK_KHR_separate_depth_stencil_layouts,VK_VERSION_1_2[]
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06137]]
    If pname:imageView is not dlink:VK_NULL_HANDLE and pname:resolveMode is
    not ename:VK_RESOLVE_MODE_NONE, pname:resolveImageLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
endif::VK_KHR_separate_depth_stencil_layouts,VK_VERSION_1_2[]
ifdef::VK_NV_shading_rate_image[]
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06138]]
    If pname:imageView is not dlink:VK_NULL_HANDLE, pname:layout must: not
    be ename:VK_IMAGE_LAYOUT_SHADING_RATE_OPTIMAL_NV
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06139]]
    If pname:imageView is not dlink:VK_NULL_HANDLE and pname:resolveMode is
    not ename:VK_RESOLVE_MODE_NONE, pname:resolveImageLayout must: not be
    ename:VK_IMAGE_LAYOUT_SHADING_RATE_OPTIMAL_NV
endif::VK_NV_shading_rate_image[]
ifdef::VK_EXT_fragment_density_map[]
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06140]]
    If pname:imageView is not dlink:VK_NULL_HANDLE, pname:layout must: not
    be ename:VK_IMAGE_LAYOUT_FRAGMENT_DENSITY_MAP_OPTIMAL_EXT
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06141]]
    If pname:imageView is not dlink:VK_NULL_HANDLE and pname:resolveMode is
    not ename:VK_RESOLVE_MODE_NONE, pname:resolveImageLayout must: not be
    ename:VK_IMAGE_LAYOUT_FRAGMENT_DENSITY_MAP_OPTIMAL_EXT
endif::VK_EXT_fragment_density_map[]
ifdef::VK_KHR_synchronization2[]
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06142]]
    If pname:imageView is not dlink:VK_NULL_HANDLE and pname:resolveMode is
    not ename:VK_RESOLVE_MODE_NONE, pname:resolveImageLayout must: not be
    ename:VK_IMAGE_LAYOUT_READ_ONLY_OPTIMAL_KHR
endif::VK_KHR_synchronization2[]
ifdef::VK_KHR_fragment_shading_rate[]
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06143]]
    If pname:imageView is not dlink:VK_NULL_HANDLE, pname:layout must: not
    be ename:VK_IMAGE_LAYOUT_FRAGMENT_SHADING_RATE_ATTACHMENT_OPTIMAL_KHR
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06144]]
    If pname:imageView is not dlink:VK_NULL_HANDLE and pname:resolveMode is
    not ename:VK_RESOLVE_MODE_NONE, pname:resolveImageLayout must: not be
    ename:VK_IMAGE_LAYOUT_FRAGMENT_SHADING_RATE_ATTACHMENT_OPTIMAL_KHR
endif::VK_KHR_fragment_shading_rate[]
ifdef::VK_KHR_swapchain[]
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06145]]
    If pname:imageView is not dlink:VK_NULL_HANDLE, pname:layout must: not
    be ename:VK_IMAGE_LAYOUT_PRESENT_SRC_KHR
  * [[VUID-VkRenderingAttachmentInfoKHR-imageView-06146]]
    If pname:imageView is not dlink:VK_NULL_HANDLE and pname:resolveMode is
    not ename:VK_RESOLVE_MODE_NONE, pname:resolveImageLayout must: not be
    ename:VK_IMAGE_LAYOUT_PRESENT_SRC_KHR
endif::VK_KHR_swapchain[]
****

include::{generated}/validity/structs/VkRenderingAttachmentInfoKHR.txt[]
--

ifdef::VK_KHR_fragment_shading_rate[]
[open,refpage='VkRenderingFragmentShadingRateAttachmentInfoKHR',desc='Structure specifying fragment shading rate attachment information',type='structs']
--
The sname:VkRenderingFragmentShadingRateAttachmentInfoKHR structure is
defined as:

include::{generated}/api/structs/VkRenderingFragmentShadingRateAttachmentInfoKHR.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:imageView is the image view that will be used as a fragment
    shading rate attachment.
  * pname:imageLayout is the layout that pname:imageView will be in during
    rendering.
  * pname:shadingRateAttachmentTexelSize specifies the number of pixels
    corresponding to each texel in pname:imageView.

This structure can be included in the pname:pNext chain of
slink:VkRenderingInfoKHR to define a
<<primsrast-fragment-shading-rate-attachment, fragment shading rate
attachment>>.
If pname:imageView is dlink:VK_NULL_HANDLE, or if this structure is not
specified, the implementation behaves as if a valid shading rate attachment
was specified with all texels specifying a single pixel per fragment.

.Valid Usage
****
  * [[VUID-VkRenderingFragmentShadingRateAttachmentInfoKHR-imageView-06147]]
    If pname:imageView is not dlink:VK_NULL_HANDLE, pname:layout must: be
    ename:VK_IMAGE_LAYOUT_GENERAL or
    ename:VK_IMAGE_LAYOUT_FRAGMENT_SHADING_RATE_ATTACHMENT_OPTIMAL_KHR
  * [[VUID-VkRenderingFragmentShadingRateAttachmentInfoKHR-imageView-06148]]
    If pname:imageView is not dlink:VK_NULL_HANDLE, it must: have been
    created with
    ename:VK_IMAGE_USAGE_FRAGMENT_SHADING_RATE_ATTACHMENT_BIT_KHR
  * [[VUID-VkRenderingFragmentShadingRateAttachmentInfoKHR-imageView-06149]]
    If pname:imageView is not dlink:VK_NULL_HANDLE,
    pname:shadingRateAttachmentTexelSize.width must: be a power of two value
  * [[VUID-VkRenderingFragmentShadingRateAttachmentInfoKHR-imageView-06150]]
    If pname:imageView is not dlink:VK_NULL_HANDLE,
    pname:shadingRateAttachmentTexelSize.width must: be less than or equal
    to <<limits-maxFragmentShadingRateAttachmentTexelSize,
    pname:maxFragmentShadingRateAttachmentTexelSize.width>>
  * [[VUID-VkRenderingFragmentShadingRateAttachmentInfoKHR-imageView-06151]]
    If pname:imageView is not dlink:VK_NULL_HANDLE,
    pname:shadingRateAttachmentTexelSize.width must: be greater than or
    equal to <<limits-minFragmentShadingRateAttachmentTexelSize,
    pname:minFragmentShadingRateAttachmentTexelSize.width>>
  * [[VUID-VkRenderingFragmentShadingRateAttachmentInfoKHR-imageView-06152]]
    If pname:imageView is not dlink:VK_NULL_HANDLE,
    pname:shadingRateAttachmentTexelSize.height must: be a power of two
    value
  * [[VUID-VkRenderingFragmentShadingRateAttachmentInfoKHR-imageView-06153]]
    If pname:imageView is not dlink:VK_NULL_HANDLE,
    pname:shadingRateAttachmentTexelSize.height must: be less than or equal
    to <<limits-maxFragmentShadingRateAttachmentTexelSize,
    pname:maxFragmentShadingRateAttachmentTexelSize.height>>
  * [[VUID-VkRenderingFragmentShadingRateAttachmentInfoKHR-imageView-06154]]
    If pname:imageView is not dlink:VK_NULL_HANDLE,
    pname:shadingRateAttachmentTexelSize.height must: be greater than or
    equal to <<limits-minFragmentShadingRateAttachmentTexelSize,
    pname:minFragmentShadingRateAttachmentTexelSize.height>>
  * [[VUID-VkRenderingFragmentShadingRateAttachmentInfoKHR-imageView-06155]]
    If pname:imageView is not dlink:VK_NULL_HANDLE, the quotient of
    pname:shadingRateAttachmentTexelSize.width and
    pname:shadingRateAttachmentTexelSize.height must: be less than or equal
    to <<limits-maxFragmentShadingRateAttachmentTexelSizeAspectRatio,
    pname:maxFragmentShadingRateAttachmentTexelSizeAspectRatio>>
  * [[VUID-VkRenderingFragmentShadingRateAttachmentInfoKHR-imageView-06156]]
    If pname:imageView is not dlink:VK_NULL_HANDLE, the quotient of
    pname:shadingRateAttachmentTexelSize.height and
    pname:shadingRateAttachmentTexelSize.width must: be less than or equal
    to <<limits-maxFragmentShadingRateAttachmentTexelSizeAspectRatio,
    pname:maxFragmentShadingRateAttachmentTexelSizeAspectRatio>>
****

include::{generated}/validity/structs/VkRenderingFragmentShadingRateAttachmentInfoKHR.txt[]
--
endif::VK_KHR_fragment_shading_rate[]

ifdef::VK_EXT_fragment_density_map[]
[open,refpage='VkRenderingFragmentDensityMapAttachmentInfoEXT',desc='Structure specifying fragment shading rate attachment information',type='structs']
--
The sname:VkRenderingFragmentDensityMapAttachmentInfoEXT structure is
defined as:

include::{generated}/api/structs/VkRenderingFragmentDensityMapAttachmentInfoEXT.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:imageView is the image view that will be used as a fragment
    shading rate attachment.
  * pname:imageLayout is the layout that pname:imageView will be in during
    rendering.

This structure can be included in the pname:pNext chain of
slink:VkRenderingInfoKHR to define a fragment density map.
If pname:imageView is dlink:VK_NULL_HANDLE, or if this structure is not
specified, pname:imageView is dlink:VK_NULL_HANDLE.

.Valid Usage
****
  * [[VUID-VkRenderingFragmentDensityMapAttachmentInfoEXT-imageView-06157]]
    If pname:imageView is not dlink:VK_NULL_HANDLE, pname:layout must: be
    ename:VK_IMAGE_LAYOUT_GENERAL or
    ename:VK_IMAGE_LAYOUT_FRAGMENT_DENSITY_MAP_OPTIMAL_EXT
  * [[VUID-VkRenderingFragmentDensityMapAttachmentInfoEXT-imageView-06158]]
    If pname:imageView is not dlink:VK_NULL_HANDLE, it must: have been
    created with ename:VK_IMAGE_USAGE_FRAGMENT_DENSITY_MAP_BIT_EXT
  * [[VUID-VkRenderingFragmentDensityMapAttachmentInfoEXT-imageView-06159]]
    If pname:imageView is not dlink:VK_NULL_HANDLE, it must: not have been
    created with ename:VK_IMAGE_CREATE_SUBSAMPLED_BIT_EXT
ifndef::VK_VERSION_1_1,VK_KHR_multiview[]
  * [[VUID-VkRenderingFragmentDensityMapAttachmentInfoEXT-imageView-06160]]
    If pname:imageView is not dlink:VK_NULL_HANDLE, it must: have a
    pname:layerCount equal to `1`
endif::VK_VERSION_1_1,VK_KHR_multiview[]
****

include::{generated}/validity/structs/VkRenderingFragmentDensityMapAttachmentInfoEXT.txt[]
--
endif::VK_EXT_fragment_density_map[]

[open,refpage='vkCmdEndRenderingKHR',desc='End a dynamic render pass instance',type='protos']
--
To end a render pass instance, call:

include::{generated}/api/protos/vkCmdEndRenderingKHR.txt[]

  * pname:commandBuffer is the command buffer in which to record the
    command.

If the value of pname:pRenderingInfo->flags used to begin this render pass
instance included ename:VK_RENDERING_SUSPENDING_BIT_KHR, then this render
pass is suspended and will be resumed later in
<<synchronization-submission-order, submission order>>.

.Valid Usage
****
  * [[VUID-vkCmdEndRenderingKHR-None-06161]]
    The current render pass instance must: have been begun with
    flink:vkCmdBeginRenderingKHR
  * [[VUID-vkCmdEndRenderingKHR-commandBuffer-06162]]
    The current render pass instance must: have been begun in
    pname:commandBuffer
****
include::{generated}/validity/protos/vkCmdEndRenderingKHR.txt[]
--

[NOTE]
.Note
====
For more complex rendering graphs, it's possible to pre-define a static
_render pass_ object, which as well as allowing draw commands, allows the
definition of framebuffer-local dependencies between multiple subpasses.
These objects have a lot of setup cost compared to
flink:vkCmdBeginRenderingKHR, but use of subpass dependencies can confer
important performance benefits on some devices.
====
endif::VK_KHR_dynamic_rendering[]

[open,refpage='VkRenderPass',desc='Opaque handle to a render pass object',type='handles']
--
A render pass object represents a collection of attachments, subpasses, and
dependencies between the subpasses, and describes how the attachments are
used over the course of the subpasses.

Render passes are represented by sname:VkRenderPass handles:

include::{generated}/api/handles/VkRenderPass.txt[]
--

An _attachment description_ describes the properties of an attachment
including its format, sample count, and how its contents are treated at the
beginning and end of each render pass instance.

[[renderpass-subpass]]
A _subpass_ represents a phase of rendering that reads and writes a subset
of the attachments in a render pass.
Rendering commands are recorded into a particular subpass of a render pass
instance.

A _subpass description_ describes the subset of attachments that is involved
in the execution of a subpass.
Each subpass can: read from some attachments as _input attachments_, write
to some as _color attachments_ or _depth/stencil attachments_,
ifdef::VK_QCOM_render_pass_shader_resolve[]
perform _shader resolve operations_ to _color_attachments_ or
_depth/stencil_attachments_,
endif::VK_QCOM_render_pass_shader_resolve[]
and perform _multisample resolve operations_ to _resolve attachments_.
A subpass description can: also include a set of _preserve attachments_,
which are attachments that are not read or written by the subpass but whose
contents must: be preserved throughout the subpass.

A subpass _uses an attachment_ if the attachment is a color, depth/stencil,
resolve,
ifdef::VK_VERSION_1_2,VK_KHR_depth_stencil_resolve[]
depth/stencil resolve,
endif::VK_VERSION_1_2,VK_KHR_depth_stencil_resolve[]
ifdef::VK_KHR_fragment_shading_rate[]
fragment shading rate,
endif::VK_KHR_fragment_shading_rate[]
or input attachment for that subpass (as determined by the
pname:pColorAttachments, pname:pDepthStencilAttachment,
pname:pResolveAttachments,
ifdef::VK_VERSION_1_2,VK_KHR_depth_stencil_resolve[]
slink:VkSubpassDescriptionDepthStencilResolve::pname:pDepthStencilResolveAttachment,
endif::VK_VERSION_1_2,VK_KHR_depth_stencil_resolve[]
ifdef::VK_KHR_fragment_shading_rate[]
slink:VkFragmentShadingRateAttachmentInfoKHR::pname:pFragmentShadingRateAttachment->attachment,
endif::VK_KHR_fragment_shading_rate[]
and pname:pInputAttachments members of slink:VkSubpassDescription,
respectively).
A subpass does not use an attachment if that attachment is preserved by the
subpass.
The _first use of an attachment_ is in the lowest numbered subpass that uses
that attachment.
Similarly, the _last use of an attachment_ is in the highest numbered
subpass that uses that attachment.

The subpasses in a render pass all render to the same dimensions, and
fragments for pixel (x,y,layer) in one subpass can: only read attachment
contents written by previous subpasses at that same (x,y,layer) location.
ifdef::VK_KHR_fragment_shading_rate,VK_NV_shading_rate,VK_EXT_fragment_density_map[]
For multi-pixel fragments, the pixel read from an input attachment is
selected from the pixels covered by that fragment in an
implementation-dependent manner.
However, this selection must: be made consistently for any fragment with the
same shading rate for the lifetime of the slink:VkDevice.
endif::VK_KHR_fragment_shading_rate,VK_NV_shading_rate,VK_EXT_fragment_density_map[]

[NOTE]
.Note
====
By describing a complete set of subpasses in advance, render passes provide
the implementation an opportunity to optimize the storage and transfer of
attachment data between subpasses.

In practice, this means that subpasses with a simple framebuffer-space
dependency may: be merged into a single tiled rendering pass, keeping the
attachment data on-chip for the duration of a render pass instance.
However, it is also quite common for a render pass to only contain a single
subpass.
====

_Subpass dependencies_ describe <<synchronization-dependencies, execution
and memory dependencies>> between subpasses.

A _subpass dependency chain_ is a sequence of subpass dependencies in a
render pass, where the source subpass of each subpass dependency (after the
first) equals the destination subpass of the previous dependency.

Execution of subpasses may: overlap or execute out of order with regards to
other subpasses, unless otherwise enforced by an execution dependency.
Each subpass only respects <<synchronization-submission-order, submission
order>> for commands recorded in the same subpass, and the
flink:vkCmdBeginRenderPass and flink:vkCmdEndRenderPass commands that
delimit the render pass - commands within other subpasses are not included.
This affects most other <<synchronization-implicit, implicit ordering
guarantees>>.

A render pass describes the structure of subpasses and attachments
independent of any specific image views for the attachments.
The specific image views that will be used for the attachments, and their
dimensions, are specified in sname:VkFramebuffer objects.
Framebuffers are created with respect to a specific render pass that the
framebuffer is compatible with (see <<renderpass-compatibility,Render Pass
Compatibility>>).
Collectively, a render pass and a framebuffer define the complete render
target state for one or more subpasses as well as the algorithmic
dependencies between the subpasses.

The various pipeline stages of the drawing commands for a given subpass may:
execute concurrently and/or out of order, both within and across drawing
commands, whilst still respecting <<synchronization-pipeline-stages-order,
pipeline order>>.
However for a given (x,y,layer,sample) sample location, certain per-sample
operations are performed in <<primsrast-order,rasterization order>>.

[open,refpage='VK_ATTACHMENT_UNUSED',desc='Unused attachment sentinel',type='consts']
--
ename:VK_ATTACHMENT_UNUSED is a constant indicating that a render pass
attachment is not used.

include::{generated}/api/enums/VK_ATTACHMENT_UNUSED.txt[]
--


[[renderpass-creation]]
== Render Pass Creation

[open,refpage='vkCreateRenderPass',desc='Create a new render pass object',type='protos']
--
To create a render pass, call:

include::{generated}/api/protos/vkCreateRenderPass.txt[]

  * pname:device is the logical device that creates the render pass.
  * pname:pCreateInfo is a pointer to a slink:VkRenderPassCreateInfo
    structure describing the parameters of the render pass.
  * pname:pAllocator controls host memory allocation as described in the
    <<memory-allocation, Memory Allocation>> chapter.
  * pname:pRenderPass is a pointer to a slink:VkRenderPass handle in which
    the resulting render pass object is returned.

include::{generated}/validity/protos/vkCreateRenderPass.txt[]
--

[open,refpage='VkRenderPassCreateInfo',desc='Structure specifying parameters of a newly created render pass',type='structs']
--
The sname:VkRenderPassCreateInfo structure is defined as:

include::{generated}/api/structs/VkRenderPassCreateInfo.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
ifndef::VK_QCOM_render_pass_transform[]
  * pname:flags is reserved for future use.
endif::VK_QCOM_render_pass_transform[]
ifdef::VK_QCOM_render_pass_transform[]
  * pname:flags is a bitmask of elink:VkRenderPassCreateFlagBits
endif::VK_QCOM_render_pass_transform[]
  * pname:attachmentCount is the number of attachments used by this render
    pass.
  * pname:pAttachments is a pointer to an array of pname:attachmentCount
    slink:VkAttachmentDescription structures describing the attachments used
    by the render pass.
  * pname:subpassCount is the number of subpasses to create.
  * pname:pSubpasses is a pointer to an array of pname:subpassCount
    slink:VkSubpassDescription structures describing each subpass.
  * pname:dependencyCount is the number of memory dependencies between pairs
    of subpasses.
  * pname:pDependencies is a pointer to an array of pname:dependencyCount
    slink:VkSubpassDependency structures describing dependencies between
    pairs of subpasses.

[NOTE]
.Note
====
Care should be taken to avoid a data race here; if any subpasses access
attachments with overlapping memory locations, and one of those accesses is
a write, a subpass dependency needs to be included between them.
====

.Valid Usage
****
  * [[VUID-VkRenderPassCreateInfo-attachment-00834]]
    If the pname:attachment member of any element of
    pname:pInputAttachments, pname:pColorAttachments,
    pname:pResolveAttachments or pname:pDepthStencilAttachment, or any
    element of pname:pPreserveAttachments in any element of pname:pSubpasses
    is not ename:VK_ATTACHMENT_UNUSED, it must: be less than
    pname:attachmentCount
  * [[VUID-VkRenderPassCreateInfo-pAttachments-00836]]
    For any member of pname:pAttachments with a pname:loadOp equal to
    ename:VK_ATTACHMENT_LOAD_OP_CLEAR, the first use of that attachment
    must: not specify a pname:layout equal to
    ename:VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkRenderPassCreateInfo-pAttachments-02511]]
    For any member of pname:pAttachments with a pname:stencilLoadOp equal to
    ename:VK_ATTACHMENT_LOAD_OP_CLEAR, the first use of that attachment
    must: not specify a pname:layout equal to
    ename:VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL
ifdef::VK_VERSION_1_1,VK_KHR_maintenance2[]
  * [[VUID-VkRenderPassCreateInfo-pAttachments-01566]]
    For any member of pname:pAttachments with a pname:loadOp equal to
    ename:VK_ATTACHMENT_LOAD_OP_CLEAR, the first use of that attachment
    must: not specify a pname:layout equal to
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL
  * [[VUID-VkRenderPassCreateInfo-pAttachments-01567]]
    For any member of pname:pAttachments with a pname:stencilLoadOp equal to
    ename:VK_ATTACHMENT_LOAD_OP_CLEAR, the first use of that attachment
    must: not specify a pname:layout equal to
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkRenderPassCreateInfo-pNext-01926]]
    If the pname:pNext chain includes a
    slink:VkRenderPassInputAttachmentAspectCreateInfo structure, the
    pname:subpass member of each element of its pname:pAspectReferences
    member must: be less than pname:subpassCount
  * [[VUID-VkRenderPassCreateInfo-pNext-01927]]
    If the pname:pNext chain includes a
    slink:VkRenderPassInputAttachmentAspectCreateInfo structure, the
    pname:inputAttachmentIndex member of each element of its
    pname:pAspectReferences member must: be less than the value of
    pname:inputAttachmentCount in the element of pname:pSubpasses identified
    by its pname:subpass member
  * [[VUID-VkRenderPassCreateInfo-pNext-01963]]
    If the pname:pNext chain includes a
    slink:VkRenderPassInputAttachmentAspectCreateInfo structure, for any
    element of the pname:pInputAttachments member of any element of
    pname:pSubpasses where the pname:attachment member is not
    ename:VK_ATTACHMENT_UNUSED, the pname:aspectMask member of the
    corresponding element of
    slink:VkRenderPassInputAttachmentAspectCreateInfo::pname:pAspectReferences
    must: only include aspects that are present in images of the format
    specified by the element of pname:pAttachments at pname:attachment
endif::VK_VERSION_1_1,VK_KHR_maintenance2[]
ifdef::VK_VERSION_1_1,VK_KHR_multiview[]
  * [[VUID-VkRenderPassCreateInfo-pNext-01928]]
    If the pname:pNext chain includes a
    slink:VkRenderPassMultiviewCreateInfo structure, and its
    pname:subpassCount member is not zero, that member must: be equal to the
    value of pname:subpassCount
  * [[VUID-VkRenderPassCreateInfo-pNext-01929]]
    If the pname:pNext chain includes a
    slink:VkRenderPassMultiviewCreateInfo structure, if its
    pname:dependencyCount member is not zero, it must: be equal to
    pname:dependencyCount
  * [[VUID-VkRenderPassCreateInfo-pNext-01930]]
    If the pname:pNext chain includes a
    slink:VkRenderPassMultiviewCreateInfo structure, for each non-zero
    element of pname:pViewOffsets, the pname:srcSubpass and pname:dstSubpass
    members of pname:pDependencies at the same index must: not be equal
  * [[VUID-VkRenderPassCreateInfo-pNext-02512]]
    If the pname:pNext chain includes a
    slink:VkRenderPassMultiviewCreateInfo structure, for any element of
    pname:pDependencies with a pname:dependencyFlags member that does not
    include ename:VK_DEPENDENCY_VIEW_LOCAL_BIT, the corresponding element of
    the pname:pViewOffsets member of that
    slink:VkRenderPassMultiviewCreateInfo instance must: be `0`
  * [[VUID-VkRenderPassCreateInfo-pNext-02513]]
    If the pname:pNext chain includes a
    slink:VkRenderPassMultiviewCreateInfo structure, elements of its
    pname:pViewMasks member must: either all be `0`, or all not be `0`
  * [[VUID-VkRenderPassCreateInfo-pNext-02514]]
    If the pname:pNext chain includes a
    slink:VkRenderPassMultiviewCreateInfo structure, and each element of its
    pname:pViewMasks member is `0`, the pname:dependencyFlags member of each
    element of pname:pDependencies must: not include
    ename:VK_DEPENDENCY_VIEW_LOCAL_BIT
  * [[VUID-VkRenderPassCreateInfo-pNext-02515]]
    If the pname:pNext chain includes a
    slink:VkRenderPassMultiviewCreateInfo structure, and each element of its
    pname:pViewMasks member is `0`, its pname:correlationMaskCount member
    must: be `0`
endif::VK_VERSION_1_1,VK_KHR_multiview[]
  * [[VUID-VkRenderPassCreateInfo-pDependencies-00837]]
    For any element of pname:pDependencies, if the pname:srcSubpass is not
    ename:VK_SUBPASS_EXTERNAL, all stage flags included in the
    pname:srcStageMask member of that dependency must: be a pipeline stage
    supported by the <<synchronization-pipeline-stages-types, pipeline>>
    identified by the pname:pipelineBindPoint member of the source subpass
  * [[VUID-VkRenderPassCreateInfo-pDependencies-00838]]
    For any element of pname:pDependencies, if the pname:dstSubpass is not
    ename:VK_SUBPASS_EXTERNAL, all stage flags included in the
    pname:dstStageMask member of that dependency must: be a pipeline stage
    supported by the <<synchronization-pipeline-stages-types, pipeline>>
    identified by the pname:pipelineBindPoint member of the destination
    subpass
  * [[VUID-VkRenderPassCreateInfo-srcSubpass-02517]]
    The pname:srcSubpass member of each element of pname:pDependencies must:
    be less than pname:subpassCount
  * [[VUID-VkRenderPassCreateInfo-dstSubpass-02518]]
    The pname:dstSubpass member of each element of pname:pDependencies must:
    be less than pname:subpassCount
****

include::{generated}/validity/structs/VkRenderPassCreateInfo.txt[]
--

ifdef::VK_QCOM_render_pass_transform[]
[open,refpage='VkRenderPassCreateFlagBits',desc='Bitmask specifying additional properties of a render pass',type='enums']
--
Bits which can: be set in slink:VkRenderPassCreateInfo::pname:flags
describing additional properties of the render pass are:

include::{generated}/api/enums/VkRenderPassCreateFlagBits.txt[]

  * ename:VK_RENDER_PASS_CREATE_TRANSFORM_BIT_QCOM specifies that the
    created render pass is compatible with
    <<vertexpostproc-renderpass-transform, render pass transform>>.
--
endif::VK_QCOM_render_pass_transform[]

[open,refpage='VkRenderPassCreateFlags',desc='Bitmask of VkRenderPassCreateFlagBits',type='flags']
--
include::{generated}/api/flags/VkRenderPassCreateFlags.txt[]

tname:VkRenderPassCreateFlags is a bitmask type for setting a mask of zero
or more elink:VkRenderPassCreateFlagBits.
--

ifdef::VK_VERSION_1_1,VK_KHR_multiview[]
[[renderpass-multiview]]
[open,refpage='VkRenderPassMultiviewCreateInfo',desc='Structure containing multiview information for all subpasses',type='structs']
--
If the slink:VkRenderPassCreateInfo::pname:pNext chain includes a
sname:VkRenderPassMultiviewCreateInfo structure, then that structure
includes an array of view masks, view offsets, and correlation masks for the
render pass.

The sname:VkRenderPassMultiviewCreateInfo structure is defined as:

include::{generated}/api/structs/VkRenderPassMultiviewCreateInfo.txt[]

ifdef::VK_KHR_multiview[]
or the equivalent

include::{generated}/api/structs/VkRenderPassMultiviewCreateInfoKHR.txt[]
endif::VK_KHR_multiview[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:subpassCount is zero or the number of subpasses in the render
    pass.
  * pname:pViewMasks is a pointer to an array of pname:subpassCount view
    masks, where each mask is a bitfield of view indices describing which
    views rendering is broadcast to in each subpass, when multiview is
    enabled.
    If pname:subpassCount is zero, each view mask is treated as zero.
  * pname:dependencyCount is zero or the number of dependencies in the
    render pass.
  * pname:pViewOffsets is a pointer to an array of pname:dependencyCount
    view offsets, one for each dependency.
    If pname:dependencyCount is zero, each dependency's view offset is
    treated as zero.
    Each view offset controls which views in the source subpass the views in
    the destination subpass depend on.
  * pname:correlationMaskCount is zero or the number of correlation masks.
  * pname:pCorrelationMasks is a pointer to an array of
    pname:correlationMaskCount view masks indicating sets of views that may:
    be more efficient to render concurrently.

When a subpass uses a non-zero view mask, _multiview_ functionality is
considered to be enabled.
Multiview is all-or-nothing for a render pass - that is, either all
subpasses must: have a non-zero view mask (though some subpasses may: have
only one view) or all must: be zero.
Multiview causes all drawing and clear commands in the subpass to behave as
if they were broadcast to each view, where a view is represented by one
layer of the framebuffer attachments.
All draws and clears are broadcast to each _view index_ whose bit is set in
the view mask.
The view index is provided in the code:ViewIndex shader input variable, and
color, depth/stencil, and input attachments all read/write the layer of the
framebuffer corresponding to the view index.

If the view mask is zero for all subpasses, multiview is considered to be
disabled and all drawing commands execute normally, without this additional
broadcasting.

Some implementations may: not support multiview in conjunction with
<<features-multiview-gs,geometry shaders>> or
<<features-multiview-tess,tessellation shaders>>.

[[renderpass-multiview-view-local]]
When multiview is enabled, the ename:VK_DEPENDENCY_VIEW_LOCAL_BIT bit in a
dependency can: be used to express a view-local dependency, meaning that
each view in the destination subpass depends on a single view in the source
subpass.
Unlike pipeline barriers, a subpass dependency can: potentially have a
different view mask in the source subpass and the destination subpass.
If the dependency is view-local, then each view ([eq]#dstView#) in the
destination subpass depends on the view [eq]#dstView {plus}
pname:pViewOffsets[dependency]# in the source subpass.
If there is not such a view in the source subpass, then this dependency does
not affect that view in the destination subpass.
If the dependency is not view-local, then all views in the destination
subpass depend on all views in the source subpass, and the view offset is
ignored.
A non-zero view offset is not allowed in a self-dependency.

The elements of pname:pCorrelationMasks are a set of masks of views
indicating that views in the same mask may: exhibit spatial coherency
between the views, making it more efficient to render them concurrently.
Correlation masks must: not have a functional effect on the results of the
multiview rendering.

When multiview is enabled, at the beginning of each subpass all non-render
pass state is undefined:.
In particular, each time flink:vkCmdBeginRenderPass or
flink:vkCmdNextSubpass is called the graphics pipeline must: be bound, any
relevant descriptor sets or vertex/index buffers must: be bound, and any
relevant dynamic state or push constants must: be set before they are used.

ifdef::VK_NVX_multiview_per_view_attributes[]

A multiview subpass can: declare that its shaders will write per-view
attributes for all views in a single invocation, by setting the
ename:VK_SUBPASS_DESCRIPTION_PER_VIEW_ATTRIBUTES_BIT_NVX bit in the subpass
description.
The only supported per-view attributes are position and viewport mask, and
per-view position and viewport masks are written to output array variables
decorated with code:PositionPerViewNV and code:ViewportMaskPerViewNV,
respectively.
If `apiext:VK_NV_viewport_array2` is not supported and enabled,
code:ViewportMaskPerViewNV must: not be used.
Values written to elements of code:PositionPerViewNV and
code:ViewportMaskPerViewNV must: not depend on the code:ViewIndex.
The shader must: also write to an output variable decorated with
code:Position, and the value written to code:Position must: equal the value
written to code:PositionPerViewNV[code:ViewIndex].
Similarly, if code:ViewportMaskPerViewNV is written to then the shader must:
also write to an output variable decorated with code:ViewportMaskNV, and the
value written to code:ViewportMaskNV must: equal the value written to
code:ViewportMaskPerViewNV[code:ViewIndex].
Implementations will either use values taken from code:Position and
code:ViewportMaskNV and invoke the shader once for each view, or will use
values taken from code:PositionPerViewNV and code:ViewportMaskPerViewNV and
invoke the shader fewer times.
The values written to code:Position and code:ViewportMaskNV must: not depend
on the values written to code:PositionPerViewNV and
code:ViewportMaskPerViewNV, or vice versa (to allow compilers to eliminate
the unused outputs).
All attributes that do not have `*PerViewNV` counterparts must: not depend
on code:ViewIndex.

Per-view attributes are all-or-nothing for a subpass.
That is, all pipelines compiled against a subpass that includes the
ename:VK_SUBPASS_DESCRIPTION_PER_VIEW_ATTRIBUTES_BIT_NVX bit must: write
per-view attributes to the `*PerViewNV[]` shader outputs, in addition to the
non-per-view (e.g. code:Position) outputs.
Pipelines compiled against a subpass that does not include this bit must:
not include the `*PerViewNV[]` outputs in their interfaces.

endif::VK_NVX_multiview_per_view_attributes[]

.Valid Usage
****
  * [[VUID-VkRenderPassMultiviewCreateInfo-pCorrelationMasks-00841]]
    Each view index must: not be set in more than one element of
    pname:pCorrelationMasks
****

include::{generated}/validity/structs/VkRenderPassMultiviewCreateInfo.txt[]
--
endif::VK_VERSION_1_1,VK_KHR_multiview[]

ifdef::VK_NVX_multiview_per_view_attributes[]
ifdef::VK_KHR_dynamic_rendering[]

[open,refpage='VkMultiviewPerViewAttributesInfoNVX',desc='Structure specifying the multiview per-attribute properties',type='structs']
--

The sname:VkMultiviewPerViewAttributesInfoNVX structure is defined as:

include::{generated}/api/structs/VkMultiviewPerViewAttributesInfoNVX.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:perViewAttributes specifies that shaders compiled for this
    pipeline write the attributes for all views in a single invocation of
    each vertex processing stage.
    All pipelines executed within a render pass instance that includes this
    bit must: write per-view attributes to the `*PerViewNV[]` shader
    outputs, in addition to the non-per-view (e.g. code:Position) outputs.
  * pname:perViewAttributesPositionXOnly specifies that shaders compiled for
    this pipeline use per-view positions which only differ in value in the x
    component.
    Per-view viewport mask can: also be used.

When dynamic render pass instances are being used, instead of specifying
ename:VK_SUBPASS_DESCRIPTION_PER_VIEW_ATTRIBUTES_BIT_NVX or
ename:VK_SUBPASS_DESCRIPTION_PER_VIEW_POSITION_X_ONLY_BIT_NVX in the subpass
description flags, the per-attibute properties of the render pass instance
must: be specified by the sname:VkMultiviewPerViewAttributesInfoNVX
structure Include the sname:VkMultiviewPerViewAttributesInfoNVX structure in
the pname:pNext chain of slink:VkGraphicsPipelineCreateInfo when creating a
graphics pipeline for dynamic rendering, slink:VkRenderingInfoKHR when
starting a dynamic render pass instance, and
slink:VkCommandBufferInheritanceInfo when specifying the dynamic render pass
instance parameters for secondary command buffers.

.Valid Usage
****
  * [[VUID-VkMultiviewPerViewAttributesInfoNVX-perViewAttributesPositionXOnly-06163]]
    If pname:perViewAttributesPositionXOnly is ename:VK_TRUE then
    pname:perViewAttributes must: also be ename:VK_TRUE
****

include::{generated}/validity/structs/VkMultiviewPerViewAttributesInfoNVX.txt[]
--
endif::VK_KHR_dynamic_rendering[]
endif::VK_NVX_multiview_per_view_attributes[]

ifdef::VK_EXT_fragment_density_map[]
[[renderpass-fragmentdensitymapattachment]]
[open,refpage='VkRenderPassFragmentDensityMapCreateInfoEXT',desc='Structure containing fragment density map attachment for render pass',type='structs']
--
If the slink:VkRenderPassCreateInfo::pname:pNext chain includes a
sname:VkRenderPassFragmentDensityMapCreateInfoEXT structure, then that
structure includes a fragment density map attachment for the render pass.

The sname:VkRenderPassFragmentDensityMapCreateInfoEXT structure is defined
as:

include::{generated}/api/structs/VkRenderPassFragmentDensityMapCreateInfoEXT.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:fragmentDensityMapAttachment is the fragment density map to use
    for the render pass.

The fragment density map is read at an implementation-dependent time with
the following constraints determined by the attachment's image view
pname:flags:

  * ename:VK_IMAGE_VIEW_CREATE_FRAGMENT_DENSITY_MAP_DYNAMIC_BIT_EXT
    specifies that the fragment density map will be read by the device
    during ename:VK_PIPELINE_STAGE_FRAGMENT_DENSITY_PROCESS_BIT_EXT
ifdef::VK_EXT_fragment_density_map2[]
  * ename:VK_IMAGE_VIEW_CREATE_FRAGMENT_DENSITY_MAP_DEFERRED_BIT_EXT
    specifies that the fragment density map will be read by the host during
    flink:vkEndCommandBuffer of the primary command buffer that the render
    pass is recorded into
endif::VK_EXT_fragment_density_map2[]
  * Otherwise the fragment density map will be read by the host during
    flink:vkCmdBeginRenderPass

The fragment density map may: additionally be read by the device during
ename:VK_PIPELINE_STAGE_FRAGMENT_DENSITY_PROCESS_BIT_EXT for any mode.

If this structure is not present, it is as if
pname:fragmentDensityMapAttachment was given as ename:VK_ATTACHMENT_UNUSED.

.Valid Usage
****
  * [[VUID-VkRenderPassFragmentDensityMapCreateInfoEXT-fragmentDensityMapAttachment-02547]]
    If pname:fragmentDensityMapAttachment is not ename:VK_ATTACHMENT_UNUSED,
    pname:fragmentDensityMapAttachment must: be less than
    sname:VkRenderPassCreateInfo::pname:attachmentCount
  * [[VUID-VkRenderPassFragmentDensityMapCreateInfoEXT-fragmentDensityMapAttachment-02548]]
    If pname:fragmentDensityMapAttachment is not ename:VK_ATTACHMENT_UNUSED,
    pname:fragmentDensityMapAttachment must: not be an element of
    sname:VkSubpassDescription::pname:pInputAttachments,
    sname:VkSubpassDescription::pname:pColorAttachments,
    sname:VkSubpassDescription::pname:pResolveAttachments,
    sname:VkSubpassDescription::pname:pDepthStencilAttachment, or
    sname:VkSubpassDescription::pname:pPreserveAttachments for any subpass
  * [[VUID-VkRenderPassFragmentDensityMapCreateInfoEXT-fragmentDensityMapAttachment-02549]]
    If pname:fragmentDensityMapAttachment is not ename:VK_ATTACHMENT_UNUSED,
    pname:layout must: be equal to
    ename:VK_IMAGE_LAYOUT_FRAGMENT_DENSITY_MAP_OPTIMAL_EXT, or
    ename:VK_IMAGE_LAYOUT_GENERAL
  * [[VUID-VkRenderPassFragmentDensityMapCreateInfoEXT-fragmentDensityMapAttachment-02550]]
    If pname:fragmentDensityMapAttachment is not ename:VK_ATTACHMENT_UNUSED,
    pname:fragmentDensityMapAttachment must: reference an attachment with a
    pname:loadOp equal to ename:VK_ATTACHMENT_LOAD_OP_LOAD or
    ename:VK_ATTACHMENT_LOAD_OP_DONT_CARE
  * [[VUID-VkRenderPassFragmentDensityMapCreateInfoEXT-fragmentDensityMapAttachment-02551]]
    If pname:fragmentDensityMapAttachment is not ename:VK_ATTACHMENT_UNUSED,
    pname:fragmentDensityMapAttachment must: reference an attachment with a
    pname:storeOp equal to ename:VK_ATTACHMENT_STORE_OP_DONT_CARE
****

include::{generated}/validity/structs/VkRenderPassFragmentDensityMapCreateInfoEXT.txt[]
--
endif::VK_EXT_fragment_density_map[]

[open,refpage='VkAttachmentDescription',desc='Structure specifying an attachment description',type='structs']
--
The sname:VkAttachmentDescription structure is defined as:

include::{generated}/api/structs/VkAttachmentDescription.txt[]

  * pname:flags is a bitmask of elink:VkAttachmentDescriptionFlagBits
    specifying additional properties of the attachment.
  * pname:format is a elink:VkFormat value specifying the format of the
    image view that will be used for the attachment.
  * pname:samples is a elink:VkSampleCountFlagBits value specifying the
    number of samples of the image.
  * pname:loadOp is a elink:VkAttachmentLoadOp value specifying how the
    contents of color and depth components of the attachment are treated at
    the beginning of the subpass where it is first used.
  * pname:storeOp is a elink:VkAttachmentStoreOp value specifying how the
    contents of color and depth components of the attachment are treated at
    the end of the subpass where it is last used.
  * pname:stencilLoadOp is a elink:VkAttachmentLoadOp value specifying how
    the contents of stencil components of the attachment are treated at the
    beginning of the subpass where it is first used.
  * pname:stencilStoreOp is a elink:VkAttachmentStoreOp value specifying how
    the contents of stencil components of the attachment are treated at the
    end of the last subpass where it is used.
  * pname:initialLayout is the layout the attachment image subresource will
    be in when a render pass instance begins.
  * pname:finalLayout is the layout the attachment image subresource will be
    transitioned to when a render pass instance ends.

[[renderpass-load-store-ops]]
If the attachment uses a color format, then pname:loadOp and pname:storeOp
are used, and pname:stencilLoadOp and pname:stencilStoreOp are ignored.
If the format has depth and/or stencil components, pname:loadOp and
pname:storeOp apply only to the depth data, while pname:stencilLoadOp and
pname:stencilStoreOp define how the stencil data is handled.
pname:loadOp and pname:stencilLoadOp define the _load operations_ that
execute as part of the first subpass that uses the attachment.
pname:storeOp and pname:stencilStoreOp define the _store operations_ that
execute as part of the last subpass that uses the attachment.

The load operation for each sample in an attachment happens-before any
recorded command which accesses the sample in the first subpass where the
attachment is used.
Load operations for attachments with a depth/stencil format execute in the
ename:VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT pipeline stage.
Load operations for attachments with a color format execute in the
ename:VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT pipeline stage.

The store operation for each sample in an attachment happens-after any
recorded command which accesses the sample in the last subpass where the
attachment is used.
Store operations for attachments with a depth/stencil format execute in the
ename:VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT pipeline stage.
Store operations for attachments with a color format execute in the
ename:VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT pipeline stage.

If an attachment is not used by any subpass, then pname:loadOp,
pname:storeOp, pname:stencilStoreOp, and pname:stencilLoadOp are ignored,
and the attachment's memory contents will not be modified by execution of a
render pass instance.

ifdef::VK_VERSION_1_1,VK_KHR_multiview[]

The load and store operations apply on the first and last use of each view
in the render pass, respectively.
If a view index of an attachment is not included in the view mask in any
subpass that uses it, then the load and store operations are ignored, and
the attachment's memory contents will not be modified by execution of a
render pass instance.

endif::VK_VERSION_1_1,VK_KHR_multiview[]

[[renderpass-precision]]
During a render pass instance, input/color attachments with color formats
that have a component size of 8, 16, or 32 bits must: be represented in the
attachment's format throughout the instance.
Attachments with other floating- or fixed-point color formats, or with depth
components may: be represented in a format with a precision higher than the
attachment format, but must: be represented with the same range.
When such a component is loaded via the pname:loadOp, it will be converted
into an implementation-dependent format used by the render pass.
Such components must: be converted from the render pass format, to the
format of the attachment, before they are resolved or stored at the end of a
render pass instance via pname:storeOp.
Conversions occur as described in <<fundamentals-numerics,Numeric
Representation and Computation>> and <<fundamentals-fixedconv, Fixed-Point
Data Conversions>>.

[[renderpass-aliasing]]
If pname:flags includes ename:VK_ATTACHMENT_DESCRIPTION_MAY_ALIAS_BIT, then
the attachment is treated as if it shares physical memory with another
attachment in the same render pass.
This information limits the ability of the implementation to reorder certain
operations (like layout transitions and the pname:loadOp) such that it is
not improperly reordered against other uses of the same physical memory via
a different attachment.
This is described in more detail below.

If a render pass uses multiple attachments that alias the same device
memory, those attachments must: each include the
ename:VK_ATTACHMENT_DESCRIPTION_MAY_ALIAS_BIT bit in their attachment
description flags.
Attachments aliasing the same memory occurs in multiple ways:

  * Multiple attachments being assigned the same image view as part of
    framebuffer creation.
  * Attachments using distinct image views that correspond to the same image
    subresource of an image.
  * Attachments using views of distinct image subresources which are bound
    to overlapping memory ranges.

[NOTE]
.Note
====
Render passes must: include subpass dependencies (either directly or via a
subpass dependency chain) between any two subpasses that operate on the same
attachment or aliasing attachments and those subpass dependencies must:
include execution and memory dependencies separating uses of the aliases, if
at least one of those subpasses writes to one of the aliases.
These dependencies must: not include the ename:VK_DEPENDENCY_BY_REGION_BIT
if the aliases are views of distinct image subresources which overlap in
memory.
====

Multiple attachments that alias the same memory must: not be used in a
single subpass.
A given attachment index must: not be used multiple times in a single
subpass, with one exception: two subpass attachments can: use the same
attachment index if at least one use is as an input attachment and neither
use is as a resolve or preserve attachment.
In other words, the same view can: be used simultaneously as an input and
color or depth/stencil attachment, but must: not be used as multiple color
or depth/stencil attachments nor as resolve or preserve attachments.
The precise set of valid scenarios is described in more detail
<<renderpass-feedbackloop, below>>.

If a set of attachments alias each other, then all except the first to be
used in the render pass must: use an pname:initialLayout of
ename:VK_IMAGE_LAYOUT_UNDEFINED, since the earlier uses of the other aliases
make their contents undefined:.
Once an alias has been used and a different alias has been used after it,
the first alias must: not be used in any later subpasses.
However, an application can: assign the same image view to multiple aliasing
attachment indices, which allows that image view to be used multiple times
even if other aliases are used in between.

[NOTE]
.Note
====
Once an attachment needs the ename:VK_ATTACHMENT_DESCRIPTION_MAY_ALIAS_BIT
bit, there should: be no additional cost of introducing additional aliases,
and using these additional aliases may: allow more efficient clearing of the
attachments on multiple uses via ename:VK_ATTACHMENT_LOAD_OP_CLEAR.
====

.Valid Usage
****
  * [[VUID-VkAttachmentDescription-finalLayout-00843]]
    pname:finalLayout must: not be ename:VK_IMAGE_LAYOUT_UNDEFINED or
    ename:VK_IMAGE_LAYOUT_PREINITIALIZED
  * [[VUID-VkAttachmentDescription-format-03280]]
    If pname:format is a color format, pname:initialLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL
  * [[VUID-VkAttachmentDescription-format-03281]]
    If pname:format is a depth/stencil format, pname:initialLayout must: not
    be ename:VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL
  * [[VUID-VkAttachmentDescription-format-03282]]
    If pname:format is a color format, pname:finalLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL
  * [[VUID-VkAttachmentDescription-format-03283]]
    If pname:format is a depth/stencil format, pname:finalLayout must: not
    be ename:VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL
ifdef::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
  * [[VUID-VkAttachmentDescription-separateDepthStencilLayouts-03284]]
    If the <<features-separateDepthStencilLayouts,
    pname:separateDepthStencilLayouts>> feature is not enabled,
    pname:initialLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentDescription-separateDepthStencilLayouts-03285]]
    If the <<features-separateDepthStencilLayouts,
    pname:separateDepthStencilLayouts>> feature is not enabled,
    pname:finalLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentDescription-format-03286]]
    If pname:format is a color format, pname:initialLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentDescription-format-03287]]
    If pname:format is a color format, pname:finalLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentDescription-format-03288]]
    If pname:format is a depth/stencil format which includes both depth and
    stencil aspects, pname:initialLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentDescription-format-03289]]
    If pname:format is a depth/stencil format which includes both depth and
    stencil aspects, pname:finalLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentDescription-format-03290]]
    If pname:format is a depth/stencil format which includes only the depth
    aspect, pname:initialLayout must: not be
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentDescription-format-03291]]
    If pname:format is a depth/stencil format which includes only the depth
    aspect, pname:finalLayout must: not be
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentDescription-format-03292]]
    If pname:format is a depth/stencil format which includes only the
    stencil aspect, pname:initialLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentDescription-format-03293]]
    If pname:format is a depth/stencil format which includes only the
    stencil aspect, pname:finalLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL
endif::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
****

include::{generated}/validity/structs/VkAttachmentDescription.txt[]
--

[open,refpage='VkAttachmentDescriptionFlagBits',desc='Bitmask specifying additional properties of an attachment',type='enums']
--
Bits which can: be set in slink:VkAttachmentDescription::pname:flags
describing additional properties of the attachment are:

include::{generated}/api/enums/VkAttachmentDescriptionFlagBits.txt[]

  * ename:VK_ATTACHMENT_DESCRIPTION_MAY_ALIAS_BIT specifies that the
    attachment aliases the same device memory as other attachments.
--

[open,refpage='VkAttachmentDescriptionFlags',desc='Bitmask of VkAttachmentDescriptionFlagBits',type='flags']
--
include::{generated}/api/flags/VkAttachmentDescriptionFlags.txt[]

tname:VkAttachmentDescriptionFlags is a bitmask type for setting a mask of
zero or more elink:VkAttachmentDescriptionFlagBits.
--

[open,refpage='VkAttachmentLoadOp',desc='Specify how contents of an attachment are treated at the beginning of a subpass',type='enums']
--
Possible values of slink:VkAttachmentDescription::pname:loadOp and
pname:stencilLoadOp, specifying how the contents of the attachment are
treated, are:

include::{generated}/api/enums/VkAttachmentLoadOp.txt[]

  * ename:VK_ATTACHMENT_LOAD_OP_LOAD specifies that the previous contents of
    the image within the render area will be preserved.
    For attachments with a depth/stencil format, this uses the access type
    ename:VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_READ_BIT.
    For attachments with a color format, this uses the access type
    ename:VK_ACCESS_COLOR_ATTACHMENT_READ_BIT.
  * ename:VK_ATTACHMENT_LOAD_OP_CLEAR specifies that the contents within the
    render area will be cleared to a uniform value, which is specified when
    a render pass instance is begun.
    For attachments with a depth/stencil format, this uses the access type
    ename:VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT.
    For attachments with a color format, this uses the access type
    ename:VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT.
  * ename:VK_ATTACHMENT_LOAD_OP_DONT_CARE specifies that the previous
    contents within the area need not be preserved; the contents of the
    attachment will be undefined: inside the render area.
    For attachments with a depth/stencil format, this uses the access type
    ename:VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT.
    For attachments with a color format, this uses the access type
    ename:VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT.
ifdef::VK_EXT_load_store_op_none[]
  * ename:VK_ATTACHMENT_LOAD_OP_NONE_EXT specifies that the previous
    contents of the image within the render area will be preserved, but the
    contents of the attachment will be undefined: inside the render pass.
    No access type is used as the image is not accessed.
endif::VK_EXT_load_store_op_none[]
--

[open,refpage='VkAttachmentStoreOp',desc='Specify how contents of an attachment are treated at the end of a subpass',type='enums']
--
Possible values of slink:VkAttachmentDescription::pname:storeOp and
pname:stencilStoreOp, specifying how the contents of the attachment are
treated, are:

include::{generated}/api/enums/VkAttachmentStoreOp.txt[]

  * ename:VK_ATTACHMENT_STORE_OP_STORE specifies the contents generated
    during the render pass and within the render area are written to memory.
    For attachments with a depth/stencil format, this uses the access type
    ename:VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT.
    For attachments with a color format, this uses the access type
    ename:VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT.
  * ename:VK_ATTACHMENT_STORE_OP_DONT_CARE specifies the contents within the
    render area are not needed after rendering, and may: be discarded; the
    contents of the attachment will be undefined: inside the render area.
    For attachments with a depth/stencil format, this uses the access type
    ename:VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT.
    For attachments with a color format, this uses the access type
    ename:VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT.
ifdef::VK_EXT_load_store_op_none,VK_KHR_dynamic_rendering,VK_QCOM_render_pass_store_ops[]
  * ename:VK_ATTACHMENT_STORE_OP_NONE_KHR specifies the contents within the
    render area are not accessed by the store operation.
    However, if the attachment was written to during the render pass, the
    contents of the attachment will be undefined: inside the render area.
endif::VK_EXT_load_store_op_none,VK_KHR_dynamic_rendering,VK_QCOM_render_pass_store_ops[]

[NOTE]
.Note
====
ename:VK_ATTACHMENT_STORE_OP_DONT_CARE can: cause contents generated during
previous render passes to be discarded before reaching memory, even if no
write to the attachment occurs during the current render pass.
====
--

ifdef::VK_VERSION_1_1,VK_KHR_maintenance2[]
[open,refpage='VkRenderPassInputAttachmentAspectCreateInfo',desc='Structure specifying, for a given subpass/input attachment pair, which aspect can: be read.',type='structs']
--
The sname:VkRenderPassInputAttachmentAspectCreateInfo structure is defined
as:

include::{generated}/api/structs/VkRenderPassInputAttachmentAspectCreateInfo.txt[]

ifdef::VK_KHR_maintenance2[]
or the equivalent

include::{generated}/api/structs/VkRenderPassInputAttachmentAspectCreateInfoKHR.txt[]
endif::VK_KHR_maintenance2[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:aspectReferenceCount is the number of elements in the
    pname:pAspectReferences array.
  * pname:pAspectReferences is a pointer to an array of
    pname:aspectReferenceCount slink:VkInputAttachmentAspectReference
    structures containing a mask describing which aspect(s) can: be accessed
    for a given input attachment within a given subpass.

To specify which aspects of an input attachment can: be read, add a
slink:VkRenderPassInputAttachmentAspectCreateInfo structure to the
pname:pNext chain of the slink:VkRenderPassCreateInfo structure:

An application can: access any aspect of an input attachment that does not
have a specified aspect mask in the pname:pAspectReferences array.
Otherwise, an application must: not access aspect(s) of an input attachment
other than those in its specified aspect mask.

include::{generated}/validity/structs/VkRenderPassInputAttachmentAspectCreateInfo.txt[]
--

[open,refpage='VkInputAttachmentAspectReference',desc='Structure specifying a subpass/input attachment pair and an aspect mask that can: be read.',type='structs']
--
The sname:VkInputAttachmentAspectReference structure is defined as:

include::{generated}/api/structs/VkInputAttachmentAspectReference.txt[]

ifdef::VK_KHR_maintenance2[]
or the equivalent

include::{generated}/api/structs/VkInputAttachmentAspectReferenceKHR.txt[]
endif::VK_KHR_maintenance2[]

  * pname:subpass is an index into the pname:pSubpasses array of the parent
    sname:VkRenderPassCreateInfo structure.
  * pname:inputAttachmentIndex is an index into the pname:pInputAttachments
    of the specified subpass.
  * pname:aspectMask is a mask of which aspect(s) can: be accessed within
    the specified subpass.

This structure specifies an aspect mask for a specific input attachment of a
specific subpass in the render pass.

pname:subpass and pname:inputAttachmentIndex index into the render pass as:

[source,c]
~~~~
pCreateInfo->pSubpasses[subpass].pInputAttachments[inputAttachmentIndex]
~~~~

.Valid Usage
****
  * [[VUID-VkInputAttachmentAspectReference-aspectMask-01964]]
    pname:aspectMask must: not include ename:VK_IMAGE_ASPECT_METADATA_BIT
ifdef::VK_EXT_image_drm_format_modifier[]
  * [[VUID-VkInputAttachmentAspectReference-aspectMask-02250]]
    pname:aspectMask must: not include
    `VK_IMAGE_ASPECT_MEMORY_PLANE__{ibit}__BIT_EXT` for any index _i_
endif::VK_EXT_image_drm_format_modifier[]
****

include::{generated}/validity/structs/VkInputAttachmentAspectReference.txt[]
--
endif::VK_VERSION_1_1,VK_KHR_maintenance2[]

[open,refpage='VkSubpassDescription',desc='Structure specifying a subpass description',type='structs']
--
The sname:VkSubpassDescription structure is defined as:

include::{generated}/api/structs/VkSubpassDescription.txt[]

  * pname:flags is a bitmask of elink:VkSubpassDescriptionFlagBits
    specifying usage of the subpass.
  * pname:pipelineBindPoint is a elink:VkPipelineBindPoint value specifying
    the pipeline type supported for this subpass.
  * pname:inputAttachmentCount is the number of input attachments.
  * pname:pInputAttachments is a pointer to an array of
    slink:VkAttachmentReference structures defining the input attachments
    for this subpass and their layouts.
  * pname:colorAttachmentCount is the number of color attachments.
  * pname:pColorAttachments is a pointer to an array of
    pname:colorAttachmentCount slink:VkAttachmentReference structures
    defining the color attachments for this subpass and their layouts.
  * pname:pResolveAttachments is `NULL` or a pointer to an array of
    pname:colorAttachmentCount slink:VkAttachmentReference structures
    defining the resolve attachments for this subpass and their layouts.
  * pname:pDepthStencilAttachment is a pointer to a
    slink:VkAttachmentReference structure specifying the depth/stencil
    attachment for this subpass and its layout.
  * pname:preserveAttachmentCount is the number of preserved attachments.
  * pname:pPreserveAttachments is a pointer to an array of
    pname:preserveAttachmentCount render pass attachment indices identifying
    attachments that are not used by this subpass, but whose contents must:
    be preserved throughout the subpass.

Each element of the pname:pInputAttachments array corresponds to an input
attachment index in a fragment shader, i.e. if a shader declares an image
variable decorated with a code:InputAttachmentIndex value of *X*, then it
uses the attachment provided in pname:pInputAttachments[*X*].
Input attachments must: also be bound to the pipeline in a descriptor set.
If the pname:attachment member of any element of pname:pInputAttachments is
ename:VK_ATTACHMENT_UNUSED, the application must: not read from the
corresponding input attachment index.
Fragment shaders can: use subpass input variables to access the contents of
an input attachment at the fragment's (x, y, layer) framebuffer coordinates.
ifdef::VK_QCOM_render_pass_transform[]
Input attachments must: not be used by any subpasses within a render pass
that enables <<vertexpostproc-renderpass-transform, render pass transform>>.
endif::VK_QCOM_render_pass_transform[]

Each element of the pname:pColorAttachments array corresponds to an output
location in the shader, i.e. if the shader declares an output variable
decorated with a code:Location value of *X*, then it uses the attachment
provided in pname:pColorAttachments[*X*].
If the pname:attachment member of any element of pname:pColorAttachments is
ename:VK_ATTACHMENT_UNUSED,
ifdef::VK_EXT_color_write_enable[]
or if <<framebuffer-color-write-enable,Color Write Enable>> has been
disabled for the corresponding attachment index,
endif::VK_EXT_color_write_enable[]
then writes to the corresponding location by a fragment shader are
discarded.

If
ifdef::VK_QCOM_render_pass_shader_resolve[]
pname:flags does not include
ename:VK_SUBPASS_DESCRIPTION_SHADER_RESOLVE_BIT_QCOM, and if
endif::VK_QCOM_render_pass_shader_resolve[]
pname:pResolveAttachments is not `NULL`, each of its elements corresponds to
a color attachment (the element in pname:pColorAttachments at the same
index), and a multisample resolve operation is defined for each attachment.
At the end of each subpass, multisample resolve operations read the
subpass's color attachments, and resolve the samples for each pixel within
the render area to the same pixel location in the corresponding resolve
attachments, unless the resolve attachment index is
ename:VK_ATTACHMENT_UNUSED.

ifdef::VK_VERSION_1_2,VK_KHR_depth_stencil_resolve[]
Similarly, if
ifdef::VK_QCOM_render_pass_shader_resolve[]
pname:flags does not include
ename:VK_SUBPASS_DESCRIPTION_SHADER_RESOLVE_BIT_QCOM, and
endif::VK_QCOM_render_pass_shader_resolve[]
slink:VkSubpassDescriptionDepthStencilResolve::pname:pDepthStencilResolveAttachment
is not `NULL` and does not have the value ename:VK_ATTACHMENT_UNUSED, it
corresponds to the depth/stencil attachment in
pname:pDepthStencilAttachment, and multisample resolve operations for depth
and stencil are defined by
slink:VkSubpassDescriptionDepthStencilResolve::pname:depthResolveMode and
slink:VkSubpassDescriptionDepthStencilResolve::pname:stencilResolveMode,
respectively.
At the end of each subpass, multisample resolve operations read the
subpass's depth/stencil attachment, and resolve the samples for each pixel
to the same pixel location in the corresponding resolve attachment.
If slink:VkSubpassDescriptionDepthStencilResolve::pname:depthResolveMode is
ename:VK_RESOLVE_MODE_NONE, then the depth component of the resolve
attachment is not written to and its contents are preserved.
Similarly, if
slink:VkSubpassDescriptionDepthStencilResolve::pname:stencilResolveMode is
ename:VK_RESOLVE_MODE_NONE, then the stencil component of the resolve
attachment is not written to and its contents are preserved.
slink:VkSubpassDescriptionDepthStencilResolve::pname:depthResolveMode is
ignored if the elink:VkFormat of the pname:pDepthStencilResolveAttachment
does not have a depth component.
Similarly,
slink:VkSubpassDescriptionDepthStencilResolve::pname:stencilResolveMode is
ignored if the elink:VkFormat of the pname:pDepthStencilResolveAttachment
does not have a stencil component.

ifdef::VK_EXT_sample_locations[]
If the image subresource range referenced by the depth/stencil attachment is
created with
ename:VK_IMAGE_CREATE_SAMPLE_LOCATIONS_COMPATIBLE_DEPTH_BIT_EXT, then the
multisample resolve operation uses the sample locations state specified in
the pname:sampleLocationsInfo member of the element of the
sname:VkRenderPassSampleLocationsBeginInfoEXT::pname:pPostSubpassSampleLocations
for the subpass.
endif::VK_EXT_sample_locations[]

endif::VK_VERSION_1_2,VK_KHR_depth_stencil_resolve[]

If pname:pDepthStencilAttachment is `NULL`, or if its attachment index is
ename:VK_ATTACHMENT_UNUSED, it indicates that no depth/stencil attachment
will be used in the subpass.

The contents of an attachment within the render area become undefined: at
the start of a subpass *S* if all of the following conditions are true:

  * The attachment is used as a color, depth/stencil, or resolve attachment
    in any subpass in the render pass.
  * There is a subpass *S~1~* that uses or preserves the attachment, and a
    subpass dependency from *S~1~* to *S*.
  * The attachment is not used or preserved in subpass *S*.

ifdef::VK_QCOM_render_pass_shader_resolve[]
In addition, the contents of an attachment within the render area become
undefined: at the start of a subpass *S* if all of the following conditions
are true:

  * ename:VK_SUBPASS_DESCRIPTION_SHADER_RESOLVE_BIT_QCOM is set.
  * The attachment is used as a color or depth/stencil in the subpass.
endif::VK_QCOM_render_pass_shader_resolve[]

Once the contents of an attachment become undefined: in subpass *S*, they
remain undefined: for subpasses in subpass dependency chains starting with
subpass *S* until they are written again.
However, they remain valid for subpasses in other subpass dependency chains
starting with subpass *S~1~* if those subpasses use or preserve the
attachment.

.Valid Usage
****
ifndef::VK_HUAWEI_subpass_shading[]
  * [[VUID-VkSubpassDescription-pipelineBindPoint-00844]]
    pname:pipelineBindPoint must: be ename:VK_PIPELINE_BIND_POINT_GRAPHICS
endif::VK_HUAWEI_subpass_shading[]
ifdef::VK_HUAWEI_subpass_shading[]
  * [[VUID-VkSubpassDescription-pipelineBindPoint-04952]]
    pname:pipelineBindPoint must: be ename:VK_PIPELINE_BIND_POINT_GRAPHICS
    or ename:VK_PIPELINE_BIND_POINT_SUBPASS_SHADING_HUAWEI
endif::VK_HUAWEI_subpass_shading[]
  * [[VUID-VkSubpassDescription-colorAttachmentCount-00845]]
    pname:colorAttachmentCount must: be less than or equal to
    sname:VkPhysicalDeviceLimits::pname:maxColorAttachments
  * [[VUID-VkSubpassDescription-loadOp-00846]]
    If the first use of an attachment in this render pass is as an input
    attachment, and the attachment is not also used as a color or
    depth/stencil attachment in the same subpass, then pname:loadOp must:
    not be ename:VK_ATTACHMENT_LOAD_OP_CLEAR
  * [[VUID-VkSubpassDescription-pResolveAttachments-00847]]
    If pname:pResolveAttachments is not `NULL`, for each resolve attachment
    that is not ename:VK_ATTACHMENT_UNUSED, the corresponding color
    attachment must: not be ename:VK_ATTACHMENT_UNUSED
  * [[VUID-VkSubpassDescription-pResolveAttachments-00848]]
    If pname:pResolveAttachments is not `NULL`, for each resolve attachment
    that is not ename:VK_ATTACHMENT_UNUSED, the corresponding color
    attachment must: not have a sample count of ename:VK_SAMPLE_COUNT_1_BIT
  * [[VUID-VkSubpassDescription-pResolveAttachments-00849]]
    If pname:pResolveAttachments is not `NULL`, each resolve attachment that
    is not ename:VK_ATTACHMENT_UNUSED must: have a sample count of
    ename:VK_SAMPLE_COUNT_1_BIT
  * [[VUID-VkSubpassDescription-pResolveAttachments-00850]]
    If pname:pResolveAttachments is not `NULL`, each resolve attachment that
    is not ename:VK_ATTACHMENT_UNUSED must: have the same elink:VkFormat as
    its corresponding color attachment
  * [[VUID-VkSubpassDescription-pColorAttachments-01417]]
    All attachments in pname:pColorAttachments that are not
    ename:VK_ATTACHMENT_UNUSED must: have the same sample count
  * [[VUID-VkSubpassDescription-pInputAttachments-02647]]
    All attachments in pname:pInputAttachments that are not
    ename:VK_ATTACHMENT_UNUSED must: have image formats whose
    <<potential-format-features, potential format features>> contain at
    least ename:VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT or
    ename:VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT
  * [[VUID-VkSubpassDescription-pColorAttachments-02648]]
    All attachments in pname:pColorAttachments that are not
    ename:VK_ATTACHMENT_UNUSED must: have image formats whose
    <<potential-format-features, potential format features>> contain
    ename:VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT
  * [[VUID-VkSubpassDescription-pResolveAttachments-02649]]
    All attachments in pname:pResolveAttachments that are not
    ename:VK_ATTACHMENT_UNUSED must: have image formats whose
    <<potential-format-features, potential format features>> contain
    ename:VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT
  * [[VUID-VkSubpassDescription-pDepthStencilAttachment-02650]]
    If pname:pDepthStencilAttachment is not `NULL` and the attachment is not
    ename:VK_ATTACHMENT_UNUSED then it must: have an image format whose
    <<potential-format-features, potential format features>> contain
    ename:VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT
ifdef::VK_AMD_mixed_attachment_samples[]
  * [[VUID-VkSubpassDescription-pColorAttachments-01506]]
    If the `apiext:VK_AMD_mixed_attachment_samples` extension is enabled,
    and all attachments in pname:pColorAttachments that are not
    ename:VK_ATTACHMENT_UNUSED must: have a sample count that is smaller
    than or equal to the sample count of pname:pDepthStencilAttachment if it
    is not ename:VK_ATTACHMENT_UNUSED
endif::VK_AMD_mixed_attachment_samples[]
  * [[VUID-VkSubpassDescription-pDepthStencilAttachment-01418]]
    If neither the `apiext:VK_AMD_mixed_attachment_samples` nor the
    `apiext:VK_NV_framebuffer_mixed_samples` extensions are enabled, and if
    pname:pDepthStencilAttachment is not ename:VK_ATTACHMENT_UNUSED and any
    attachments in pname:pColorAttachments are not
    ename:VK_ATTACHMENT_UNUSED, they must: have the same sample count
  * [[VUID-VkSubpassDescription-attachment-00853]]
    Each element of pname:pPreserveAttachments must: not be
    ename:VK_ATTACHMENT_UNUSED
  * [[VUID-VkSubpassDescription-pPreserveAttachments-00854]]
    Each element of pname:pPreserveAttachments must: not also be an element
    of any other member of the subpass description
  * [[VUID-VkSubpassDescription-layout-02519]]
    If any attachment is used by more than one slink:VkAttachmentReference
    member, then each use must: use the same pname:layout
  * [[VUID-VkSubpassDescription-None-04437]]
    Each attachment must: follow the <<attachment-type-imagelayout, image
    layout requirements>> specified for its attachment type
ifdef::VK_NVX_multiview_per_view_attributes[]
  * [[VUID-VkSubpassDescription-flags-00856]]
    If pname:flags includes
    ename:VK_SUBPASS_DESCRIPTION_PER_VIEW_POSITION_X_ONLY_BIT_NVX, it must:
    also include ename:VK_SUBPASS_DESCRIPTION_PER_VIEW_ATTRIBUTES_BIT_NVX
endif::VK_NVX_multiview_per_view_attributes[]
ifdef::VK_QCOM_render_pass_shader_resolve[]
  * [[VUID-VkSubpassDescription-flags-03341]]
    If pname:flags includes
    ename:VK_SUBPASS_DESCRIPTION_SHADER_RESOLVE_BIT_QCOM, and if
    pname:pResolveAttachments is not `NULL`, then each resolve attachment
    must: be ename:VK_ATTACHMENT_UNUSED
  * [[VUID-VkSubpassDescription-flags-03342]]
    If pname:flags includes
    ename:VK_SUBPASS_DESCRIPTION_SHADER_RESOLVE_BIT_QCOM, and if
    pname:pDepthStencilResolveAttachmentKHR is not `NULL`, then the
    depth/stencil resolve attachment must: be ename:VK_ATTACHMENT_UNUSED
  * [[VUID-VkSubpassDescription-flags-03343]]
    If pname:flags includes
    ename:VK_SUBPASS_DESCRIPTION_SHADER_RESOLVE_BIT_QCOM, then the subpass
    must: be the last subpass in a subpass dependency chain
endif::VK_QCOM_render_pass_shader_resolve[]
ifdef::VK_QCOM_render_pass_transform[]
  * [[VUID-VkSubpassDescription-pInputAttachments-02868]]
    If the render pass is created with
    ename:VK_RENDER_PASS_CREATE_TRANSFORM_BIT_QCOM each of the elements of
    pname:pInputAttachments must: be ename:VK_ATTACHMENT_UNUSED
endif::VK_QCOM_render_pass_transform[]
  * [[VUID-VkSubpassDescription-pDepthStencilAttachment-04438]]
    pname:pDepthStencilAttachment and pname:pColorAttachments must not
    contain references to the same attachment
****

include::{generated}/validity/structs/VkSubpassDescription.txt[]
--

[open,refpage='VkSubpassDescriptionFlagBits',desc='Bitmask specifying usage of a subpass',type='enums']
--
Bits which can: be set in slink:VkSubpassDescription::pname:flags,
specifying usage of the subpass, are:

include::{generated}/api/enums/VkSubpassDescriptionFlagBits.txt[]

ifdef::VK_NVX_multiview_per_view_attributes[]
  * ename:VK_SUBPASS_DESCRIPTION_PER_VIEW_ATTRIBUTES_BIT_NVX specifies that
    shaders compiled for this subpass write the attributes for all views in
    a single invocation of each
    <<pipeline-graphics-subsets-pre-rasterization,pre-rasterization shader
    stage>>.
    All pipelines compiled against a subpass that includes this bit must:
    write per-view attributes to the `*PerViewNV[]` shader outputs, in
    addition to the non-per-view (e.g. code:Position) outputs.
  * ename:VK_SUBPASS_DESCRIPTION_PER_VIEW_POSITION_X_ONLY_BIT_NVX specifies
    that shaders compiled for this subpass use per-view positions which only
    differ in value in the x component.
    Per-view viewport mask can: also be used.
endif::VK_NVX_multiview_per_view_attributes[]
ifdef::VK_QCOM_render_pass_shader_resolve[]
  * ename:VK_SUBPASS_DESCRIPTION_FRAGMENT_REGION_BIT_QCOM specifies that the
    framebuffer region is the fragment region, that is, the minimum region
    dependencies are by pixel rather than by sample, such that any fragment
    shader invocation can: access any sample associated with that fragment
    shader invocation.
  * ename:VK_SUBPASS_DESCRIPTION_SHADER_RESOLVE_BIT_QCOM specifies that the
    subpass performs shader resolve operations.
endif::VK_QCOM_render_pass_shader_resolve[]

ifndef::VK_NVX_multiview_per_view_attributes,VK_QCOM_render_pass_shader_resolve[]
[NOTE]
.Note
====
All bits for this type are defined by extensions, and none of those
extensions are enabled in this build of the specification.
====
endif::VK_NVX_multiview_per_view_attributes,VK_QCOM_render_pass_shader_resolve[]
ifdef::VK_QCOM_render_pass_shader_resolve[]
[NOTE]
.Note
====
Shader resolve operations allow for custom resolve operations, but
overdrawing pixels may: have a performance and/or power cost.
Furthermore, since the content of any depth stencil attachment or color
attachment is undefined: at the begining of a shader resolve subpass, any
depth testing, stencil testing, or blending operation which sources these
undefined: values also has undefined: result value.
====
endif::VK_QCOM_render_pass_shader_resolve[]
--

[open,refpage='VkSubpassDescriptionFlags',desc='Bitmask of VkSubpassDescriptionFlagBits',type='flags']
--
include::{generated}/api/flags/VkSubpassDescriptionFlags.txt[]

tname:VkSubpassDescriptionFlags is a bitmask type for setting a mask of zero
or more elink:VkSubpassDescriptionFlagBits.
--

[open,refpage='VkAttachmentReference',desc='Structure specifying an attachment reference',type='structs']
--
The sname:VkAttachmentReference structure is defined as:

include::{generated}/api/structs/VkAttachmentReference.txt[]

  * pname:attachment is either an integer value identifying an attachment at
    the corresponding index in
    slink:VkRenderPassCreateInfo::pname:pAttachments, or
    ename:VK_ATTACHMENT_UNUSED to signify that this attachment is not used.
  * pname:layout is a elink:VkImageLayout value specifying the layout the
    attachment uses during the subpass.

.Valid Usage
****
  * [[VUID-VkAttachmentReference-layout-00857]]
    If pname:attachment is not ename:VK_ATTACHMENT_UNUSED, pname:layout
    must: not be ename:VK_IMAGE_LAYOUT_UNDEFINED,
    ename:VK_IMAGE_LAYOUT_PREINITIALIZED,
    ename:VK_IMAGE_LAYOUT_PRESENT_SRC_KHR,
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
****

include::{generated}/validity/structs/VkAttachmentReference.txt[]
--

[open,refpage='VK_SUBPASS_EXTERNAL',desc='Subpass index sentinel expanding synchronization scope outside a subpass',type='consts']
--
ename:VK_SUBPASS_EXTERNAL is a special subpass index value expanding
synchronization scope outside a subpass.
It is described in more detail by slink:VkSubpassDependency.

include::{generated}/api/enums/VK_SUBPASS_EXTERNAL.txt[]
--

[open,refpage='VkSubpassDependency',desc='Structure specifying a subpass dependency',type='structs']
--
The sname:VkSubpassDependency structure is defined as:

include::{generated}/api/structs/VkSubpassDependency.txt[]

  * pname:srcSubpass is the subpass index of the first subpass in the
    dependency, or ename:VK_SUBPASS_EXTERNAL.
  * pname:dstSubpass is the subpass index of the second subpass in the
    dependency, or ename:VK_SUBPASS_EXTERNAL.
  * pname:srcStageMask is a bitmask of elink:VkPipelineStageFlagBits
    specifying the <<synchronization-pipeline-stages-masks, source stage
    mask>>.
  * pname:dstStageMask is a bitmask of elink:VkPipelineStageFlagBits
    specifying the <<synchronization-pipeline-stages-masks, destination
    stage mask>>
  * pname:srcAccessMask is a bitmask of elink:VkAccessFlagBits specifying a
    <<synchronization-access-masks, source access mask>>.
  * pname:dstAccessMask is a bitmask of elink:VkAccessFlagBits specifying a
    <<synchronization-access-masks, destination access mask>>.
  * pname:dependencyFlags is a bitmask of elink:VkDependencyFlagBits.

If pname:srcSubpass is equal to pname:dstSubpass then the
slink:VkSubpassDependency describes a
<<synchronization-pipeline-barriers-subpass-self-dependencies, subpass
self-dependency>>, and only constrains the pipeline barriers allowed within
a subpass instance.
Otherwise, when a render pass instance which includes a subpass dependency
is submitted to a queue, it defines a memory dependency between the
subpasses identified by pname:srcSubpass and pname:dstSubpass.

If pname:srcSubpass is equal to ename:VK_SUBPASS_EXTERNAL, the first
<<synchronization-dependencies-scopes, synchronization scope>> includes
commands that occur earlier in <<synchronization-submission-order,submission
order>> than the flink:vkCmdBeginRenderPass used to begin the render pass
instance.
Otherwise, the first set of commands includes all commands submitted as part
of the subpass instance identified by pname:srcSubpass and any load, store
or multisample resolve operations on attachments used in pname:srcSubpass.
In either case, the first synchronization scope is limited to operations on
the pipeline stages determined by the
<<synchronization-pipeline-stages-masks, source stage mask>> specified by
pname:srcStageMask.

If pname:dstSubpass is equal to ename:VK_SUBPASS_EXTERNAL, the second
<<synchronization-dependencies-scopes, synchronization scope>> includes
commands that occur later in <<synchronization-submission-order,submission
order>> than the flink:vkCmdEndRenderPass used to end the render pass
instance.
Otherwise, the second set of commands includes all commands submitted as
part of the subpass instance identified by pname:dstSubpass and any load,
store or multisample resolve operations on attachments used in
pname:dstSubpass.
In either case, the second synchronization scope is limited to operations on
the pipeline stages determined by the
<<synchronization-pipeline-stages-masks, destination stage mask>> specified
by pname:dstStageMask.

The first <<synchronization-dependencies-access-scopes, access scope>> is
limited to accesses in the pipeline stages determined by the
<<synchronization-pipeline-stages-masks, source stage mask>> specified by
pname:srcStageMask.
It is also limited to access types in the <<synchronization-access-masks,
source access mask>> specified by pname:srcAccessMask.

The second <<synchronization-dependencies-access-scopes, access scope>> is
limited to accesses in the pipeline stages determined by the
<<synchronization-pipeline-stages-masks, destination stage mask>> specified
by pname:dstStageMask.
It is also limited to access types in the <<synchronization-access-masks,
destination access mask>> specified by pname:dstAccessMask.

The <<synchronization-dependencies-available-and-visible, availability and
visibility operations>> defined by a subpass dependency affect the execution
of <<renderpass-layout-transitions, image layout transitions>> within the
render pass.

[NOTE]
.Note
====
For non-attachment resources, the memory dependency expressed by subpass
dependency is nearly identical to that of a slink:VkMemoryBarrier (with
matching pname:srcAccessMask and pname:dstAccessMask parameters) submitted
as a part of a flink:vkCmdPipelineBarrier (with matching pname:srcStageMask
and pname:dstStageMask parameters).
The only difference being that its scopes are limited to the identified
subpasses rather than potentially affecting everything before and after.

For attachments however, subpass dependencies work more like a
slink:VkImageMemoryBarrier defined similarly to the slink:VkMemoryBarrier
above, the queue family indices set to ename:VK_QUEUE_FAMILY_IGNORED, and
layouts as follows:

  * The equivalent to pname:oldLayout is the attachment's layout according
    to the subpass description for pname:srcSubpass.
  * The equivalent to pname:newLayout is the attachment's layout according
    to the subpass description for pname:dstSubpass.
====

.Valid Usage
****
  * [[VUID-VkSubpassDependency-srcStageMask-00860]]
    If the <<features-geometryShader,geometry shaders>> feature is not
    enabled, pname:srcStageMask must: not contain
    ename:VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT
  * [[VUID-VkSubpassDependency-dstStageMask-00861]]
    If the <<features-geometryShader,geometry shaders>> feature is not
    enabled, pname:dstStageMask must: not contain
    ename:VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT
  * [[VUID-VkSubpassDependency-srcStageMask-00862]]
    If the <<features-tessellationShader,tessellation shaders>> feature is
    not enabled, pname:srcStageMask must: not contain
    ename:VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT or
    ename:VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT
  * [[VUID-VkSubpassDependency-dstStageMask-00863]]
    If the <<features-tessellationShader,tessellation shaders>> feature is
    not enabled, pname:dstStageMask must: not contain
    ename:VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT or
    ename:VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT
  * [[VUID-VkSubpassDependency-srcSubpass-00864]]
    pname:srcSubpass must: be less than or equal to pname:dstSubpass, unless
    one of them is ename:VK_SUBPASS_EXTERNAL, to avoid cyclic dependencies
    and ensure a valid execution order
  * [[VUID-VkSubpassDependency-srcSubpass-00865]]
    pname:srcSubpass and pname:dstSubpass must: not both be equal to
    ename:VK_SUBPASS_EXTERNAL
  * [[VUID-VkSubpassDependency-srcSubpass-00867]]
    If pname:srcSubpass is equal to pname:dstSubpass and not all of the
    stages in pname:srcStageMask and pname:dstStageMask are
    <<synchronization-framebuffer-regions,framebuffer-space stages>>, the
    <<synchronization-pipeline-stages-order, logically latest>> pipeline
    stage in pname:srcStageMask must: be
    <<synchronization-pipeline-stages-order, logically earlier>> than or
    equal to the <<synchronization-pipeline-stages-order, logically
    earliest>> pipeline stage in pname:dstStageMask
  * [[VUID-VkSubpassDependency-srcAccessMask-00868]]
    Any access flag included in pname:srcAccessMask must: be supported by
    one of the pipeline stages in pname:srcStageMask, as specified in the
    <<synchronization-access-types-supported, table of supported access
    types>>
  * [[VUID-VkSubpassDependency-dstAccessMask-00869]]
    Any access flag included in pname:dstAccessMask must: be supported by
    one of the pipeline stages in pname:dstStageMask, as specified in the
    <<synchronization-access-types-supported, table of supported access
    types>>
  * [[VUID-VkSubpassDependency-srcSubpass-02243]]
    If pname:srcSubpass equals pname:dstSubpass, and pname:srcStageMask and
    pname:dstStageMask both include a
    <<synchronization-framebuffer-regions,framebuffer-space stage>>, then
    pname:dependencyFlags must: include ename:VK_DEPENDENCY_BY_REGION_BIT
ifdef::VK_VERSION_1_1,VK_KHR_multiview[]
  * [[VUID-VkSubpassDependency-dependencyFlags-02520]]
    If pname:dependencyFlags includes ename:VK_DEPENDENCY_VIEW_LOCAL_BIT,
    pname:srcSubpass must: not be equal to ename:VK_SUBPASS_EXTERNAL
  * [[VUID-VkSubpassDependency-dependencyFlags-02521]]
    If pname:dependencyFlags includes ename:VK_DEPENDENCY_VIEW_LOCAL_BIT,
    pname:dstSubpass must: not be equal to ename:VK_SUBPASS_EXTERNAL
  * [[VUID-VkSubpassDependency-srcSubpass-00872]]
    If pname:srcSubpass equals pname:dstSubpass and that subpass has more
    than one bit set in the view mask, then pname:dependencyFlags must:
    include ename:VK_DEPENDENCY_VIEW_LOCAL_BIT
endif::VK_VERSION_1_1,VK_KHR_multiview[]
ifdef::VK_NV_mesh_shader[]
  * [[VUID-VkSubpassDependency-srcStageMask-02099]]
    If the <<features-meshShader,mesh shaders>> feature is not enabled,
    pname:srcStageMask must: not contain
    ename:VK_PIPELINE_STAGE_MESH_SHADER_BIT_NV
  * [[VUID-VkSubpassDependency-srcStageMask-02100]]
    If the <<features-taskShader,task shaders>> feature is not enabled,
    pname:srcStageMask must: not contain
    ename:VK_PIPELINE_STAGE_TASK_SHADER_BIT_NV
  * [[VUID-VkSubpassDependency-dstStageMask-02101]]
    If the <<features-meshShader,mesh shaders>> feature is not enabled,
    pname:dstStageMask must: not contain
    ename:VK_PIPELINE_STAGE_MESH_SHADER_BIT_NV
  * [[VUID-VkSubpassDependency-dstStageMask-02102]]
    If the <<features-taskShader,task shaders>> feature is not enabled,
    pname:dstStageMask must: not contain
    ename:VK_PIPELINE_STAGE_TASK_SHADER_BIT_NV
endif::VK_NV_mesh_shader[]
ifdef::VK_KHR_synchronization2[]
  * [[VUID-VkSubpassDependency-synchronization2-04984]]
    If the <<features-synchronization2, pname:synchronization2>> feature is
    not enabled, pname:srcStageMask must: not be `0`
  * [[VUID-VkSubpassDependency-synchronization2-04985]]
    If the <<features-synchronization2, pname:synchronization2>> feature is
    not enabled, pname:dstStageMask must: not be `0`
endif::VK_KHR_synchronization2[]
ifndef::VK_KHR_synchronization2[]
  * [[VUID-VkSubpassDependency-srcStageMask-04986]]
    pname:srcStageMask must: not be `0`
  * [[VUID-VkSubpassDependency-dstStageMask-04987]]
    pname:dstStageMask must: not be `0`
endif::VK_KHR_synchronization2[]
****

include::{generated}/validity/structs/VkSubpassDependency.txt[]
--

ifdef::VK_VERSION_1_1,VK_KHR_multiview[]

When multiview is enabled, the execution of the multiple views of one
subpass may: not occur simultaneously or even back-to-back, and rather may:
be interleaved with the execution of other subpasses.
The load and store operations apply to attachments on a per-view basis.
For example, an attachment using ename:VK_ATTACHMENT_LOAD_OP_CLEAR will have
each view cleared on first use, but the first use of one view may be
temporally distant from the first use of another view.

[NOTE]
.Note
====
A good mental model for multiview is to think of a multiview subpass as if
it were a collection of individual (per-view) subpasses that are logically
grouped together and described as a single multiview subpass in the API.
Similarly, a multiview attachment can be thought of like several individual
attachments that happen to be layers in a single image.
A view-local dependency between two multiview subpasses acts like a set of
one-to-one dependencies between corresponding pairs of per-view subpasses.
A view-global dependency between two multiview subpasses acts like a set of
[eq]#N {times} M# dependencies between all pairs of per-view subpasses in
the source and destination.
Thus, it is a more compact representation which also makes clear the
commonality and reuse that is present between views in a subpass.
This interpretation motivates the answers to questions like "`when does the
load op apply`" - it is on the first use of each view of an attachment, as
if each view was a separate attachment.
====

endif::VK_VERSION_1_1,VK_KHR_multiview[]

ifdef::VK_EXT_transform_feedback[]
If any two subpasses of a render pass activate transform feedback to the
same bound transform feedback buffers, a subpass dependency must: be
included (either directly or via some intermediate subpasses) between them.
endif::VK_EXT_transform_feedback[]

ifdef::editing-notes[]
[NOTE]
.editing-note
====
The following two alleged implicit dependencies are practically no-ops, as
the operations they describe are already guaranteed by semaphores and
submission order (so they are almost entirely no-ops on their own).
The *only* reason they exist is because it simplifies reasoning about where
<<renderpass-layout-transitions, automatic layout transitions>> happen.
Further rewrites of this chapter could potentially remove the need for
these.
====
endif::editing-notes[]

[[renderpass-implicit-dependencies]]
If there is no subpass dependency from ename:VK_SUBPASS_EXTERNAL to the
first subpass that uses an attachment, then an implicit subpass dependency
exists from ename:VK_SUBPASS_EXTERNAL to the first subpass it is used in.
The implicit subpass dependency only exists if there exists an automatic
layout transition away from pname:initialLayout.
The subpass dependency operates as if defined with the following parameters:

[source,c]
~~~~
VkSubpassDependency implicitDependency = {
    .srcSubpass = VK_SUBPASS_EXTERNAL;
    .dstSubpass = firstSubpass; // First subpass attachment is used in
ifdef::VK_KHR_synchronization2[]
    .srcStageMask = VK_PIPELINE_STAGE_NONE_KHR;
endif::VK_KHR_synchronization2[]
ifndef::VK_KHR_synchronization2[]
    .srcStageMask = VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT;
endif::VK_KHR_synchronization2[]
    .dstStageMask = VK_PIPELINE_STAGE_ALL_COMMANDS_BIT;
    .srcAccessMask = 0;
    .dstAccessMask = VK_ACCESS_INPUT_ATTACHMENT_READ_BIT |
                     VK_ACCESS_COLOR_ATTACHMENT_READ_BIT |
                     VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT |
                     VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_READ_BIT |
                     VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT;
    .dependencyFlags = 0;
};
~~~~

Similarly, if there is no subpass dependency from the last subpass that uses
an attachment to ename:VK_SUBPASS_EXTERNAL, then an implicit subpass
dependency exists from the last subpass it is used in to
ename:VK_SUBPASS_EXTERNAL.
The implicit subpass dependency only exists if there exists an automatic
layout transition into pname:finalLayout.
The subpass dependency operates as if defined with the following parameters:

[source,c]
~~~~
VkSubpassDependency implicitDependency = {
    .srcSubpass = lastSubpass; // Last subpass attachment is used in
    .dstSubpass = VK_SUBPASS_EXTERNAL;
    .srcStageMask = VK_PIPELINE_STAGE_ALL_COMMANDS_BIT;
ifdef::VK_KHR_synchronization2[]
    .dstStageMask = VK_PIPELINE_STAGE_NONE_KHR;
endif::VK_KHR_synchronization2[]
ifndef::VK_KHR_synchronization2[]
    .dstStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
endif::VK_KHR_synchronization2[]
    .srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT |
                     VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT;
    .dstAccessMask = 0;
    .dependencyFlags = 0;
};
~~~~

[[renderpass-layout-transitions]]
As subpasses may: overlap or execute out of order with regards to other
subpasses unless a subpass dependency chain describes otherwise, the layout
transitions required between subpasses cannot: be known to an application.
Instead, an application provides the layout that each attachment must: be in
at the start and end of a render pass, and the layout it must: be in during
each subpass it is used in.
The implementation then must: execute layout transitions between subpasses
in order to guarantee that the images are in the layouts required by each
subpass, and in the final layout at the end of the render pass.

Automatic layout transitions apply to the entire image subresource attached
to the framebuffer.
ifdef::VK_VERSION_1_1,VK_KHR_maintenance1[]
If the attachment view is a 2D or 2D array view of a 3D image, even if the
attachment view only refers to a subset of the slices of the selected mip
level of the 3D image, automatic layout transitions apply to the entire
subresource referenced which is the entire mip level in this case.
endif::VK_VERSION_1_1,VK_KHR_maintenance1[]

Automatic layout transitions away from the layout used in a subpass
happen-after the availability operations for all dependencies with that
subpass as the pname:srcSubpass.

Automatic layout transitions into the layout used in a subpass happen-before
the visibility operations for all dependencies with that subpass as the
pname:dstSubpass.

Automatic layout transitions away from pname:initialLayout happen-after the
availability operations for all dependencies with a pname:srcSubpass equal
to ename:VK_SUBPASS_EXTERNAL, where pname:dstSubpass uses the attachment
that will be transitioned.
For attachments created with ename:VK_ATTACHMENT_DESCRIPTION_MAY_ALIAS_BIT,
automatic layout transitions away from pname:initialLayout happen-after the
availability operations for all dependencies with a pname:srcSubpass equal
to ename:VK_SUBPASS_EXTERNAL, where pname:dstSubpass uses any aliased
attachment.

Automatic layout transitions into pname:finalLayout happen-before the
visibility operations for all dependencies with a pname:dstSubpass equal to
ename:VK_SUBPASS_EXTERNAL, where pname:srcSubpass uses the attachment that
will be transitioned.
For attachments created with ename:VK_ATTACHMENT_DESCRIPTION_MAY_ALIAS_BIT,
automatic layout transitions into pname:finalLayout happen-before the
visibility operations for all dependencies with a pname:dstSubpass equal to
ename:VK_SUBPASS_EXTERNAL, where pname:srcSubpass uses any aliased
attachment.

ifdef::VK_EXT_sample_locations[]

The image layout of the depth aspect of a depth/stencil attachment referring
to an image created with
ename:VK_IMAGE_CREATE_SAMPLE_LOCATIONS_COMPATIBLE_DEPTH_BIT_EXT is dependent
on the last sample locations used to render to the attachment, thus
automatic layout transitions use the sample locations state specified in
slink:VkRenderPassSampleLocationsBeginInfoEXT.

Automatic layout transitions of an attachment referring to a depth/stencil
image created with
ename:VK_IMAGE_CREATE_SAMPLE_LOCATIONS_COMPATIBLE_DEPTH_BIT_EXT use the
sample locations the image subresource range referenced by the attachment
was last rendered with.
If the current render pass does not use the attachment as a depth/stencil
attachment in any subpass that happens-before, the automatic layout
transition uses the sample locations state specified in the
pname:sampleLocationsInfo member of the element of the
sname:VkRenderPassSampleLocationsBeginInfoEXT::pname:pAttachmentInitialSampleLocations
array for which the pname:attachmentIndex member equals the attachment index
of the attachment, if one is specified.
Otherwise, the automatic layout transition uses the sample locations state
specified in the pname:sampleLocationsInfo member of the element of the
sname:VkRenderPassSampleLocationsBeginInfoEXT::pname:pPostSubpassSampleLocations
array for which the pname:subpassIndex member equals the index of the
subpass that last used the attachment as a depth/stencil attachment, if one
is specified.

If no sample locations state has been specified for an automatic layout
transition performed on an attachment referring to a depth/stencil image
created with ename:VK_IMAGE_CREATE_SAMPLE_LOCATIONS_COMPATIBLE_DEPTH_BIT_EXT
the contents of the depth aspect of the depth/stencil attachment become
undefined: as if the layout of the attachment was transitioned from the
ename:VK_IMAGE_LAYOUT_UNDEFINED layout.

endif::VK_EXT_sample_locations[]

If two subpasses use the same attachment, and both subpasses use the
attachment in a read-only layout, no subpass dependency needs to be
specified between those subpasses.
If an implementation treats those layouts separately, it must: insert an
implicit subpass dependency between those subpasses to separate the uses in
each layout.
The subpass dependency operates as if defined with the following parameters:

[source,c]
~~~~
// Used for input attachments
VkPipelineStageFlags inputAttachmentStages = VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT;
VkAccessFlags inputAttachmentDstAccess = VK_ACCESS_INPUT_ATTACHMENT_READ_BIT;

// Used for depth/stencil attachments
VkPipelineStageFlags depthStencilAttachmentStages = VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT | VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT;
VkAccessFlags depthStencilAttachmentDstAccess = VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_READ_BIT;

VkSubpassDependency implicitDependency = {
    .srcSubpass = firstSubpass;
    .dstSubpass = secondSubpass;
    .srcStageMask = inputAttachmentStages | depthStencilAttachmentStages;
    .dstStageMask = inputAttachmentStages | depthStencilAttachmentStages;
    .srcAccessMask = 0;
    .dstAccessMask = inputAttachmentDstAccess | depthStencilAttachmentDstAccess;
    .dependencyFlags = 0;
};
~~~~

[[renderpass-feedbackloop]]
If a subpass uses the same attachment as both an input attachment and either
a color attachment or a depth/stencil attachment, writes via the color or
depth/stencil attachment are not automatically made visible to reads via the
input attachment, causing a _feedback loop_, except in any of the following
conditions:

  * If the color components or depth/stencil components read by the input
    attachment are mutually exclusive with the components written by the
    color or depth/stencil attachments, then there is no feedback loop.
    This requires the graphics pipelines used by the subpass to disable
    writes to color components that are read as inputs via the
ifdef::VK_EXT_color_write_enable[]
    pname:colorWriteEnable or
endif::VK_EXT_color_write_enable[]
    pname:colorWriteMask, and to disable writes to depth/stencil components
    that are read as inputs via pname:depthWriteEnable or
    pname:stencilTestEnable.
  * If the attachment is used as an input attachment and depth/stencil
    attachment only, and the depth/stencil attachment is not written to.

Rendering within a subpass that contains a feedback loop creates a
<<memory-model-access-data-race, data race>>, except in the following cases:

  * If a memory dependency is inserted between when the attachment is
    written and when it is subsequently read by later fragments.
    <<synchronization-pipeline-barriers, Pipeline barriers>> expressing a
    <<synchronization-pipeline-barriers-subpass-self-dependencies, subpass
    self-dependency>> are the only way to achieve this, and one must: be
    inserted every time a fragment will read values at a particular sample
    (x, y, layer, sample) coordinate, if those values have been written
    since the most recent pipeline barrier; or since the start of the
    subpass, if there have been no pipeline barriers since the start of the
    subpass.

[[attachment-type-imagelayout]]
Attachments have requirements for a valid image layout depending on the
usage

  * An attachment used as an input attachment must: be in the
ifdef::VK_KHR_shared_presentable_image[]
    ename:VK_IMAGE_LAYOUT_SHARED_PRESENT_KHR,
endif::VK_KHR_shared_presentable_image[]
ifdef::VK_VERSION_1_1,VK_KHR_maintenance2[]
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL,
endif::VK_VERSION_1_1,VK_KHR_maintenance2[]
ifdef::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL,
endif::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_GENERAL layout.
  * An attachment used only as a color attachment must: be in the
    ename:VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL or
ifdef::VK_KHR_shared_presentable_image[]
    ename:VK_IMAGE_LAYOUT_SHARED_PRESENT_KHR or
endif::VK_KHR_shared_presentable_image[]
    ename:VK_IMAGE_LAYOUT_GENERAL layout.
  * An attachment used as both an input attachment and a color attachment
    must: be in the
ifdef::VK_KHR_shared_presentable_image[]
    ename:VK_IMAGE_LAYOUT_SHARED_PRESENT_KHR or
endif::VK_KHR_shared_presentable_image[]
    ename:VK_IMAGE_LAYOUT_GENERAL layout.
  * An attachment used only as a depth/stencil attachment must: be in the
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
ifdef::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL,
endif::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
ifdef::VK_KHR_shared_presentable_image[]
    ename:VK_IMAGE_LAYOUT_SHARED_PRESENT_KHR,
endif::VK_KHR_shared_presentable_image[]
ifdef::VK_VERSION_1_1,VK_KHR_maintenance2[]
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL,
endif::VK_VERSION_1_1,VK_KHR_maintenance2[]
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_GENERAL layout.
  * An attachment used as an input attachment and depth/stencil attachment
    must: be in the
ifdef::VK_KHR_shared_presentable_image[]
    ename:VK_IMAGE_LAYOUT_SHARED_PRESENT_KHR,
endif::VK_KHR_shared_presentable_image[]
ifdef::VK_VERSION_1_1,VK_KHR_maintenance2[]
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL,
endif::VK_VERSION_1_1,VK_KHR_maintenance2[]
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_GENERAL layout.

An attachment must: not be used as both a depth/stencil attachment and a
color attachment.

ifdef::VK_VERSION_1_2,VK_KHR_create_renderpass2[]
A more extensible version of render pass creation is also defined below.

[open,refpage='vkCreateRenderPass2',desc='Create a new render pass object',type='protos',alias='vkCreateRenderPass2KHR']
--
To create a render pass, call:

ifdef::VK_VERSION_1_2[]
include::{generated}/api/protos/vkCreateRenderPass2.txt[]
endif::VK_VERSION_1_2[]

ifdef::VK_VERSION_1_2+VK_KHR_create_renderpass2[or the equivalent command]

ifdef::VK_KHR_create_renderpass2[]
include::{generated}/api/protos/vkCreateRenderPass2KHR.txt[]
endif::VK_KHR_create_renderpass2[]

  * pname:device is the logical device that creates the render pass.
  * pname:pCreateInfo is a pointer to a slink:VkRenderPassCreateInfo2
    structure describing the parameters of the render pass.
  * pname:pAllocator controls host memory allocation as described in the
    <<memory-allocation, Memory Allocation>> chapter.
  * pname:pRenderPass is a pointer to a slink:VkRenderPass handle in which
    the resulting render pass object is returned.

This command is functionally identical to flink:vkCreateRenderPass, but
includes extensible sub-structures that include pname:sType and pname:pNext
parameters, allowing them to be more easily extended.

include::{generated}/validity/protos/vkCreateRenderPass2.txt[]
--

[open,refpage='VkRenderPassCreateInfo2',desc='Structure specifying parameters of a newly created render pass',type='structs',alias='VkRenderPassCreateInfo2KHR']
--
The sname:VkRenderPassCreateInfo2 structure is defined as:

include::{generated}/api/structs/VkRenderPassCreateInfo2.txt[]

ifdef::VK_KHR_create_renderpass2[]
or the equivalent

include::{generated}/api/structs/VkRenderPassCreateInfo2KHR.txt[]
endif::VK_KHR_create_renderpass2[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:flags is reserved for future use.
  * pname:attachmentCount is the number of attachments used by this render
    pass.
  * pname:pAttachments is a pointer to an array of pname:attachmentCount
    slink:VkAttachmentDescription2 structures describing the attachments
    used by the render pass.
  * pname:subpassCount is the number of subpasses to create.
  * pname:pSubpasses is a pointer to an array of pname:subpassCount
    slink:VkSubpassDescription2 structures describing each subpass.
  * pname:dependencyCount is the number of dependencies between pairs of
    subpasses.
  * pname:pDependencies is a pointer to an array of pname:dependencyCount
    slink:VkSubpassDependency2 structures describing dependencies between
    pairs of subpasses.
  * pname:correlatedViewMaskCount is the number of correlation masks.
  * pname:pCorrelatedViewMasks is a pointer to an array of view masks
    indicating sets of views that may: be more efficient to render
    concurrently.

Parameters defined by this structure with the same name as those in
slink:VkRenderPassCreateInfo have the identical effect to those parameters;
the child structures are variants of those used in
slink:VkRenderPassCreateInfo which add pname:sType and pname:pNext
parameters, allowing them to be extended.

If the slink:VkSubpassDescription2::pname:viewMask member of any element of
pname:pSubpasses is not zero, _multiview_ functionality is considered to be
enabled for this render pass.

pname:correlatedViewMaskCount and pname:pCorrelatedViewMasks have the same
effect as slink:VkRenderPassMultiviewCreateInfo::pname:correlationMaskCount
and slink:VkRenderPassMultiviewCreateInfo::pname:pCorrelationMasks,
respectively.

.Valid Usage
****
  * [[VUID-VkRenderPassCreateInfo2-None-03049]]
    If any two subpasses operate on attachments with overlapping ranges of
    the same sname:VkDeviceMemory object, and at least one subpass writes to
    that area of sname:VkDeviceMemory, a subpass dependency must: be
    included (either directly or via some intermediate subpasses) between
    them
  * [[VUID-VkRenderPassCreateInfo2-attachment-03050]]
    If the pname:attachment member of any element of
    pname:pInputAttachments, pname:pColorAttachments,
    pname:pResolveAttachments or pname:pDepthStencilAttachment, or the
    attachment indexed by any element of pname:pPreserveAttachments in any
    given element of pname:pSubpasses is bound to a range of a
    sname:VkDeviceMemory object that overlaps with any other attachment in
    any subpass (including the same subpass), the
    sname:VkAttachmentDescription2 structures describing them must: include
    ename:VK_ATTACHMENT_DESCRIPTION_MAY_ALIAS_BIT in pname:flags
  * [[VUID-VkRenderPassCreateInfo2-attachment-03051]]
    If the pname:attachment member of any element of
    pname:pInputAttachments, pname:pColorAttachments,
    pname:pResolveAttachments or pname:pDepthStencilAttachment, or any
    element of pname:pPreserveAttachments in any given element of
    pname:pSubpasses is not ename:VK_ATTACHMENT_UNUSED, it must: be less
    than pname:attachmentCount
  * [[VUID-VkRenderPassCreateInfo2-pAttachments-02522]]
    For any member of pname:pAttachments with a pname:loadOp equal to
    ename:VK_ATTACHMENT_LOAD_OP_CLEAR, the first use of that attachment
    must: not specify a pname:layout equal to
    ename:VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL
  * [[VUID-VkRenderPassCreateInfo2-pAttachments-02523]]
    For any member of pname:pAttachments with a pname:stencilLoadOp equal to
    ename:VK_ATTACHMENT_LOAD_OP_CLEAR, the first use of that attachment
    must: not specify a pname:layout equal to
    ename:VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkRenderPassCreateInfo2-pDependencies-03054]]
    For any element of pname:pDependencies, if the pname:srcSubpass is not
    ename:VK_SUBPASS_EXTERNAL, all stage flags included in the
    pname:srcStageMask member of that dependency must: be a pipeline stage
    supported by the <<synchronization-pipeline-stages-types, pipeline>>
    identified by the pname:pipelineBindPoint member of the source subpass
  * [[VUID-VkRenderPassCreateInfo2-pDependencies-03055]]
    For any element of pname:pDependencies, if the pname:dstSubpass is not
    ename:VK_SUBPASS_EXTERNAL, all stage flags included in the
    pname:dstStageMask member of that dependency must: be a pipeline stage
    supported by the <<synchronization-pipeline-stages-types, pipeline>>
    identified by the pname:pipelineBindPoint member of the destination
    subpass
  * [[VUID-VkRenderPassCreateInfo2-pCorrelatedViewMasks-03056]]
    The set of bits included in any element of pname:pCorrelatedViewMasks
    must: not overlap with the set of bits included in any other element of
    pname:pCorrelatedViewMasks
  * [[VUID-VkRenderPassCreateInfo2-viewMask-03057]]
    If the slink:VkSubpassDescription2::pname:viewMask member of all
    elements of pname:pSubpasses is `0`, pname:correlatedViewMaskCount must:
    be `0`
  * [[VUID-VkRenderPassCreateInfo2-viewMask-03058]]
    The slink:VkSubpassDescription2::pname:viewMask member of all elements
    of pname:pSubpasses must: either all be `0`, or all not be `0`
  * [[VUID-VkRenderPassCreateInfo2-viewMask-03059]]
    If the slink:VkSubpassDescription2::pname:viewMask member of all
    elements of pname:pSubpasses is `0`, the pname:dependencyFlags member of
    any element of pname:pDependencies must: not include
    ename:VK_DEPENDENCY_VIEW_LOCAL_BIT
  * [[VUID-VkRenderPassCreateInfo2-pDependencies-03060]]
    For any element of pname:pDependencies where its pname:srcSubpass member
    equals its pname:dstSubpass member, if the pname:viewMask member of the
    corresponding element of pname:pSubpasses includes more than one bit,
    its pname:dependencyFlags member must: include
    ename:VK_DEPENDENCY_VIEW_LOCAL_BIT
  * [[VUID-VkRenderPassCreateInfo2-attachment-02525]]
    If the pname:attachment member of any element of the
    pname:pInputAttachments member of any element of pname:pSubpasses is not
    ename:VK_ATTACHMENT_UNUSED, the pname:aspectMask member of that element
    of pname:pInputAttachments must: only include aspects that are present
    in images of the format specified by the element of pname:pAttachments
    specified by pname:attachment
  * [[VUID-VkRenderPassCreateInfo2-srcSubpass-02526]]
    The pname:srcSubpass member of each element of pname:pDependencies must:
    be less than pname:subpassCount
  * [[VUID-VkRenderPassCreateInfo2-dstSubpass-02527]]
    The pname:dstSubpass member of each element of pname:pDependencies must:
    be less than pname:subpassCount
ifdef::VK_KHR_fragment_shading_rate[]
  * [[VUID-VkRenderPassCreateInfo2-pAttachments-04585]]
    If any element of pname:pAttachments is used as a fragment shading rate
    attachment in any subpass, it must: not be used as any other attachment
    in the render pass
ifdef::VK_QCOM_render_pass_transform[]
  * [[VUID-VkRenderPassCreateInfo2-flags-04521]]
    If pname:flags includes ename:VK_RENDER_PASS_CREATE_TRANSFORM_BIT_QCOM,
    an element of pname:pSubpasses includes an instance of
    slink:VkFragmentShadingRateAttachmentInfoKHR in its pname:pNext chain,
    and the pname:pFragmentShadingRateAttachment member of that structure is
    not equal to `NULL`, the pname:attachment member of
    pname:pFragmentShadingRateAttachment must: be ename:VK_ATTACHMENT_UNUSED
endif::VK_QCOM_render_pass_transform[]
  * [[VUID-VkRenderPassCreateInfo2-pAttachments-04586]]
    If any element of pname:pAttachments is used as a fragment shading rate
    attachment in any subpass, it must: have an image format whose
    <<potential-format-features, potential format features>> contain
    ename:VK_FORMAT_FEATURE_FRAGMENT_SHADING_RATE_ATTACHMENT_BIT_KHR
endif::VK_KHR_fragment_shading_rate[]
ifdef::VK_QCOM_render_pass_shader_resolve[]
  * [[VUID-VkRenderPassCreateInfo2-rasterizationSamples-04905]]
    If the pipeline is being created with fragment shader state, and the
    apiext:VK_QCOM_render_pass_shader_resolve extension is enabled, and if
    subpass has any input attachments, and if the subpass description
    contains ename:VK_SUBPASS_DESCRIPTION_FRAGMENT_REGION_BIT_QCOM, then the
    sample count of the input attachments must: equal
    pname:rasterizationSamples
  * [[VUID-VkRenderPassCreateInfo2-sampleShadingEnable-04906]]
    If the pipeline is being created with fragment shader state, and the
    apiext:VK_QCOM_render_pass_shader_resolve extension is enabled, and if
    the subpass description contains
    ename:VK_SUBPASS_DESCRIPTION_FRAGMENT_REGION_BIT_QCOM, then
    pname:sampleShadingEnable must: be false
  * [[VUID-VkRenderPassCreateInfo2-flags-04907]]
    If pname:flags includes
    ename:VK_SUBPASS_DESCRIPTION_SHADER_RESOLVE_BIT_QCOM, and if
    pname:pResolveAttachments is not `NULL`, then each resolve attachment
    must: be ename:VK_ATTACHMENT_UNUSED
  * [[VUID-VkRenderPassCreateInfo2-flags-04908]]
    If pname:flags includes
    ename:VK_SUBPASS_DESCRIPTION_SHADER_RESOLVE_BIT_QCOM, and if
    pname:pDepthStencilResolveAttachmentKHR is not `NULL`, then the
    depth/stencil resolve attachment must: be ename:VK_ATTACHMENT_UNUSED
  * [[VUID-VkRenderPassCreateInfo2-flags-04909]]
    If pname:flags includes
    ename:VK_SUBPASS_DESCRIPTION_SHADER_RESOLVE_BIT_QCOM, then the subpass
    must: be the last subpass in a subpass dependency chain
endif::VK_QCOM_render_pass_shader_resolve[]
****

include::{generated}/validity/structs/VkRenderPassCreateInfo2.txt[]
--

[open,refpage='VkAttachmentDescription2',desc='Structure specifying an attachment description',type='structs',alias='VkAttachmentDescription2KHR']
--
The sname:VkAttachmentDescription2 structure is defined as:

include::{generated}/api/structs/VkAttachmentDescription2.txt[]

ifdef::VK_KHR_create_renderpass2[]
or the equivalent

include::{generated}/api/structs/VkAttachmentDescription2KHR.txt[]
endif::VK_KHR_create_renderpass2[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:flags is a bitmask of elink:VkAttachmentDescriptionFlagBits
    specifying additional properties of the attachment.
  * pname:format is a elink:VkFormat value specifying the format of the
    image that will be used for the attachment.
  * pname:samples is a elink:VkSampleCountFlagBits value specifying the
    number of samples of the image.
  * pname:loadOp is a elink:VkAttachmentLoadOp value specifying how the
    contents of color and depth components of the attachment are treated at
    the beginning of the subpass where it is first used.
  * pname:storeOp is a elink:VkAttachmentStoreOp value specifying how the
    contents of color and depth components of the attachment are treated at
    the end of the subpass where it is last used.
  * pname:stencilLoadOp is a elink:VkAttachmentLoadOp value specifying how
    the contents of stencil components of the attachment are treated at the
    beginning of the subpass where it is first used.
  * pname:stencilStoreOp is a elink:VkAttachmentStoreOp value specifying how
    the contents of stencil components of the attachment are treated at the
    end of the last subpass where it is used.
  * pname:initialLayout is the layout the attachment image subresource will
    be in when a render pass instance begins.
  * pname:finalLayout is the layout the attachment image subresource will be
    transitioned to when a render pass instance ends.

Parameters defined by this structure with the same name as those in
slink:VkAttachmentDescription have the identical effect to those parameters.

ifdef::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
If the <<features-separateDepthStencilLayouts,
pname:separateDepthStencilLayouts>> feature is enabled, and pname:format is
a depth/stencil format, pname:initialLayout and pname:finalLayout can: be
set to a layout that only specifies the layout of the depth aspect.

If the pname:pNext chain includes a
slink:VkAttachmentDescriptionStencilLayout structure, then the
pname:stencilInitialLayout and pname:stencilFinalLayout members specify the
initial and final layouts of the stencil aspect of a depth/stencil format,
and pname:initialLayout and pname:finalLayout only apply to the depth
aspect.
For depth-only formats, the slink:VkAttachmentDescriptionStencilLayout
structure is ignored.
For stencil-only formats, the initial and final layouts of the stencil
aspect are taken from the slink:VkAttachmentDescriptionStencilLayout
structure if present, or pname:initialLayout and pname:finalLayout if not
present.

If pname:format is a depth/stencil format, and either pname:initialLayout or
pname:finalLayout does not specify a layout for the stencil aspect, then the
application must: specify the initial and final layouts of the stencil
aspect by including a slink:VkAttachmentDescriptionStencilLayout structure
in the pname:pNext chain.

endif::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]

.Valid Usage
****
  * [[VUID-VkAttachmentDescription2-finalLayout-03061]]
    pname:finalLayout must: not be ename:VK_IMAGE_LAYOUT_UNDEFINED or
    ename:VK_IMAGE_LAYOUT_PREINITIALIZED
  * [[VUID-VkAttachmentDescription2-format-03294]]
    If pname:format is a color format, pname:initialLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL
  * [[VUID-VkAttachmentDescription2-format-03295]]
    If pname:format is a depth/stencil format, pname:initialLayout must: not
    be ename:VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL
  * [[VUID-VkAttachmentDescription2-format-03296]]
    If pname:format is a color format, pname:finalLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL
  * [[VUID-VkAttachmentDescription2-format-03297]]
    If pname:format is a depth/stencil format, pname:finalLayout must: not
    be ename:VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL
ifdef::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
  * [[VUID-VkAttachmentDescription2-separateDepthStencilLayouts-03298]]
    If the <<features-separateDepthStencilLayouts,
    pname:separateDepthStencilLayouts>> feature is not enabled,
    pname:initialLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentDescription2-separateDepthStencilLayouts-03299]]
    If the <<features-separateDepthStencilLayouts,
    pname:separateDepthStencilLayouts>> feature is not enabled,
    pname:finalLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentDescription2-format-03300]]
    If pname:format is a color format, pname:initialLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentDescription2-format-03301]]
    If pname:format is a color format, pname:finalLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentDescription2-format-03302]]
    If pname:format is a depth/stencil format which includes both depth and
    stencil aspects, and pname:initialLayout is
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL, the pname:pNext chain
    must: include a slink:VkAttachmentDescriptionStencilLayout structure
  * [[VUID-VkAttachmentDescription2-format-03303]]
    If pname:format is a depth/stencil format which includes both depth and
    stencil aspects, and pname:finalLayout is
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL, the pname:pNext chain
    must: include a slink:VkAttachmentDescriptionStencilLayout structure
  * [[VUID-VkAttachmentDescription2-format-03304]]
    If pname:format is a depth/stencil format which includes only the depth
    aspect, pname:initialLayout must: not be
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentDescription2-format-03305]]
    If pname:format is a depth/stencil format which includes only the depth
    aspect, pname:finalLayout must: not be
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentDescription2-format-03306]]
    If pname:format is a depth/stencil format which includes only the
    stencil aspect, pname:initialLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentDescription2-format-03307]]
    If pname:format is a depth/stencil format which includes only the
    stencil aspect, pname:finalLayout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL
endif::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
****

include::{generated}/validity/structs/VkAttachmentDescription2.txt[]
--

ifdef::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
[open,refpage='VkAttachmentDescriptionStencilLayout',desc='Structure specifying an attachment description',type='structs',alias='VkAttachmentDescriptionStencilLayoutKHR']
--
The sname:VkAttachmentDescriptionStencilLayout structure is defined as:

include::{generated}/api/structs/VkAttachmentDescriptionStencilLayout.txt[]

ifdef::VK_KHR_separate_depth_stencil_layouts[]
or the equivalent

include::{generated}/api/structs/VkAttachmentDescriptionStencilLayoutKHR.txt[]
endif::VK_KHR_separate_depth_stencil_layouts[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:stencilInitialLayout is the layout the stencil aspect of the
    attachment image subresource will be in when a render pass instance
    begins.
  * pname:stencilFinalLayout is the layout the stencil aspect of the
    attachment image subresource will be transitioned to when a render pass
    instance ends.

.Valid Usage
****
  * [[VUID-VkAttachmentDescriptionStencilLayout-stencilInitialLayout-03308]]
    pname:stencilInitialLayout must: not be
    ename:VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL
  * [[VUID-VkAttachmentDescriptionStencilLayout-stencilFinalLayout-03309]]
    pname:stencilFinalLayout must: not be
    ename:VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL
  * [[VUID-VkAttachmentDescriptionStencilLayout-stencilFinalLayout-03310]]
    pname:stencilFinalLayout must: not be ename:VK_IMAGE_LAYOUT_UNDEFINED or
    ename:VK_IMAGE_LAYOUT_PREINITIALIZED
****

include::{generated}/validity/structs/VkAttachmentDescriptionStencilLayout.txt[]
--
endif::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]

[open,refpage='VkSubpassDescription2',desc='Structure specifying a subpass description',type='structs',alias='VkSubpassDescription2KHR']
--
The sname:VkSubpassDescription2 structure is defined as:

include::{generated}/api/structs/VkSubpassDescription2.txt[]

ifdef::VK_KHR_create_renderpass2[]
or the equivalent

include::{generated}/api/structs/VkSubpassDescription2KHR.txt[]
endif::VK_KHR_create_renderpass2[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:flags is a bitmask of elink:VkSubpassDescriptionFlagBits
    specifying usage of the subpass.
  * pname:pipelineBindPoint is a elink:VkPipelineBindPoint value specifying
    the pipeline type supported for this subpass.
  * pname:viewMask is a bitfield of view indices describing which views
    rendering is broadcast to in this subpass, when multiview is enabled.
  * pname:inputAttachmentCount is the number of input attachments.
  * pname:pInputAttachments is a pointer to an array of
    slink:VkAttachmentReference2 structures defining the input attachments
    for this subpass and their layouts.
  * pname:colorAttachmentCount is the number of color attachments.
  * pname:pColorAttachments is a pointer to an array of
    pname:colorAttachmentCount slink:VkAttachmentReference2 structures
    defining the color attachments for this subpass and their layouts.
  * pname:pResolveAttachments is `NULL` or a pointer to an array of
    pname:colorAttachmentCount slink:VkAttachmentReference2 structures
    defining the resolve attachments for this subpass and their layouts.
  * pname:pDepthStencilAttachment is a pointer to a
    slink:VkAttachmentReference2 structure specifying the depth/stencil
    attachment for this subpass and its layout.
  * pname:preserveAttachmentCount is the number of preserved attachments.
  * pname:pPreserveAttachments is a pointer to an array of
    pname:preserveAttachmentCount render pass attachment indices identifying
    attachments that are not used by this subpass, but whose contents must:
    be preserved throughout the subpass.

Parameters defined by this structure with the same name as those in
slink:VkSubpassDescription have the identical effect to those parameters.

pname:viewMask has the same effect for the described subpass as
slink:VkRenderPassMultiviewCreateInfo::pname:pViewMasks has on each
corresponding subpass.

ifdef::VK_KHR_fragment_shading_rate[]
If a slink:VkFragmentShadingRateAttachmentInfoKHR structure is included in
the pname:pNext chain, pname:pFragmentShadingRateAttachment is not `NULL`,
and its pname:attachment member is not ename:VK_ATTACHMENT_UNUSED, the
identified attachment defines a fragment shading rate attachment for that
subpass.
endif::VK_KHR_fragment_shading_rate[]

.Valid Usage
****
ifndef::VK_HUAWEI_subpass_shading[]
  * [[VUID-VkSubpassDescription2-pipelineBindPoint-03062]]
    pname:pipelineBindPoint must: be ename:VK_PIPELINE_BIND_POINT_GRAPHICS
endif::VK_HUAWEI_subpass_shading[]
ifdef::VK_HUAWEI_subpass_shading[]
  * [[VUID-VkSubpassDescription2-pipelineBindPoint-04953]]
    pname:pipelineBindPoint must: be ename:VK_PIPELINE_BIND_POINT_GRAPHICS
    or ename:VK_PIPELINE_BIND_POINT_SUBPASS_SHADING_HUAWEI
endif::VK_HUAWEI_subpass_shading[]
  * [[VUID-VkSubpassDescription2-colorAttachmentCount-03063]]
    pname:colorAttachmentCount must: be less than or equal to
    sname:VkPhysicalDeviceLimits::pname:maxColorAttachments
  * [[VUID-VkSubpassDescription2-loadOp-03064]]
    If the first use of an attachment in this render pass is as an input
    attachment, and the attachment is not also used as a color or
    depth/stencil attachment in the same subpass, then pname:loadOp must:
    not be ename:VK_ATTACHMENT_LOAD_OP_CLEAR
  * [[VUID-VkSubpassDescription2-pResolveAttachments-03065]]
    If pname:pResolveAttachments is not `NULL`, for each resolve attachment
    that does not have the value ename:VK_ATTACHMENT_UNUSED, the
    corresponding color attachment must: not have the value
    ename:VK_ATTACHMENT_UNUSED
  * [[VUID-VkSubpassDescription2-pResolveAttachments-03066]]
    If pname:pResolveAttachments is not `NULL`, for each resolve attachment
    that is not ename:VK_ATTACHMENT_UNUSED, the corresponding color
    attachment must: not have a sample count of ename:VK_SAMPLE_COUNT_1_BIT
  * [[VUID-VkSubpassDescription2-pResolveAttachments-03067]]
    If pname:pResolveAttachments is not `NULL`, each resolve attachment that
    is not ename:VK_ATTACHMENT_UNUSED must: have a sample count of
    ename:VK_SAMPLE_COUNT_1_BIT
  * [[VUID-VkSubpassDescription2-pResolveAttachments-03068]]
    Any given element of pname:pResolveAttachments must: have the same
    elink:VkFormat as its corresponding color attachment
  * [[VUID-VkSubpassDescription2-pColorAttachments-03069]]
    All attachments in pname:pColorAttachments that are not
    ename:VK_ATTACHMENT_UNUSED must: have the same sample count
  * [[VUID-VkSubpassDescription2-pInputAttachments-02897]]
    All attachments in pname:pInputAttachments that are not
    ename:VK_ATTACHMENT_UNUSED must: have image formats whose
    <<potential-format-features, potential format features>> contain at
    least ename:VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT or
    ename:VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT
  * [[VUID-VkSubpassDescription2-pColorAttachments-02898]]
    All attachments in pname:pColorAttachments that are not
    ename:VK_ATTACHMENT_UNUSED must: have image formats whose
    <<potential-format-features, potential format features>> contain
    ename:VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT
  * [[VUID-VkSubpassDescription2-pResolveAttachments-02899]]
    All attachments in pname:pResolveAttachments that are not
    ename:VK_ATTACHMENT_UNUSED must: have image formats whose
    <<potential-format-features, potential format features>> contain
    ename:VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT
  * [[VUID-VkSubpassDescription2-pDepthStencilAttachment-02900]]
    If pname:pDepthStencilAttachment is not `NULL` and the attachment is not
    ename:VK_ATTACHMENT_UNUSED then it must: have an image format whose
    <<potential-format-features, potential format features>> contain
    ename:VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT
ifdef::VK_AMD_mixed_attachment_samples[]
  * [[VUID-VkSubpassDescription2-pColorAttachments-03070]]
    If the `apiext:VK_AMD_mixed_attachment_samples` extension is enabled,
    all attachments in pname:pColorAttachments that are not
    ename:VK_ATTACHMENT_UNUSED must: have a sample count that is smaller
    than or equal to the sample count of pname:pDepthStencilAttachment if it
    is not ename:VK_ATTACHMENT_UNUSED
endif::VK_AMD_mixed_attachment_samples[]
  * [[VUID-VkSubpassDescription2-pDepthStencilAttachment-03071]]
    If neither the `apiext:VK_AMD_mixed_attachment_samples` nor the
    `apiext:VK_NV_framebuffer_mixed_samples` extensions are enabled, and if
    pname:pDepthStencilAttachment is not ename:VK_ATTACHMENT_UNUSED and any
    attachments in pname:pColorAttachments are not
    ename:VK_ATTACHMENT_UNUSED, they must: have the same sample count
  * [[VUID-VkSubpassDescription2-attachment-03073]]
    Each element of pname:pPreserveAttachments must: not be
    ename:VK_ATTACHMENT_UNUSED
  * [[VUID-VkSubpassDescription2-pPreserveAttachments-03074]]
    Any given element of pname:pPreserveAttachments must: not also be an
    element of any other member of the subpass description
  * [[VUID-VkSubpassDescription2-layout-02528]]
    If any attachment is used by more than one slink:VkAttachmentReference2
    member, then each use must: use the same pname:layout
  * [[VUID-VkSubpassDescription2-None-04439]]
    Attachments must: follow the <<attachment-type-imagelayout, image layout
    requirements>> based on the type of attachment it is being used as
ifdef::VK_NVX_multiview_per_view_attributes[]
  * [[VUID-VkSubpassDescription2-flags-03076]]
    If pname:flags includes
    ename:VK_SUBPASS_DESCRIPTION_PER_VIEW_POSITION_X_ONLY_BIT_NVX, it must:
    also include ename:VK_SUBPASS_DESCRIPTION_PER_VIEW_ATTRIBUTES_BIT_NVX
endif::VK_NVX_multiview_per_view_attributes[]
  * [[VUID-VkSubpassDescription2-attachment-02799]]
    If the pname:attachment member of any element of pname:pInputAttachments
    is not ename:VK_ATTACHMENT_UNUSED, then the pname:aspectMask member
    must: be a valid combination of elink:VkImageAspectFlagBits
  * [[VUID-VkSubpassDescription2-attachment-02800]]
    If the pname:attachment member of any element of pname:pInputAttachments
    is not ename:VK_ATTACHMENT_UNUSED, then the pname:aspectMask member
    must: not be `0`
  * [[VUID-VkSubpassDescription2-attachment-02801]]
    If the pname:attachment member of any element of pname:pInputAttachments
    is not ename:VK_ATTACHMENT_UNUSED, then the pname:aspectMask member
    must: not include ename:VK_IMAGE_ASPECT_METADATA_BIT
ifdef::VK_EXT_image_drm_format_modifier[]
  * [[VUID-VkSubpassDescription2-attachment-04563]]
    If the pname:attachment member of any element of pname:pInputAttachments
    is not ename:VK_ATTACHMENT_UNUSED, then the pname:aspectMask member
    must: not include `VK_IMAGE_ASPECT_MEMORY_PLANE__{ibit}__BIT_EXT` for
    any index _i_
endif::VK_EXT_image_drm_format_modifier[]
  * [[VUID-VkSubpassDescription2-pDepthStencilAttachment-04440]]
    An attachment must: not be used in both pname:pDepthStencilAttachment
    and pname:pColorAttachments
****

include::{generated}/validity/structs/VkSubpassDescription2.txt[]
--

ifdef::VK_VERSION_1_2,VK_KHR_depth_stencil_resolve[]
[open,refpage='VkSubpassDescriptionDepthStencilResolve',desc='Structure specifying depth/stencil resolve operations for a subpass',type='structs',alias='VkSubpassDescriptionDepthStencilResolveKHR']
--
If the pname:pNext chain of sname:VkSubpassDescription2 includes a
sname:VkSubpassDescriptionDepthStencilResolve structure, then that structure
describes multisample resolve operations for the depth/stencil attachment in
a subpass.

The sname:VkSubpassDescriptionDepthStencilResolve structure is defined as:

include::{generated}/api/structs/VkSubpassDescriptionDepthStencilResolve.txt[]

ifdef::VK_KHR_depth_stencil_resolve[]
or the equivalent

include::{generated}/api/structs/VkSubpassDescriptionDepthStencilResolveKHR.txt[]
endif::VK_KHR_depth_stencil_resolve[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:depthResolveMode is a elink:VkResolveModeFlagBits value describing
    the depth resolve mode.
  * pname:stencilResolveMode is a elink:VkResolveModeFlagBits value
    describing the stencil resolve mode.
  * pname:pDepthStencilResolveAttachment is `NULL` or a pointer to a
    slink:VkAttachmentReference2 structure defining the depth/stencil
    resolve attachment for this subpass and its layout.

.Valid Usage
****
  * [[VUID-VkSubpassDescriptionDepthStencilResolve-pDepthStencilResolveAttachment-03177]]
    If pname:pDepthStencilResolveAttachment is not `NULL` and does not have
    the value ename:VK_ATTACHMENT_UNUSED, pname:pDepthStencilAttachment
    must: not have the value ename:VK_ATTACHMENT_UNUSED
  * [[VUID-VkSubpassDescriptionDepthStencilResolve-pDepthStencilResolveAttachment-03178]]
    If pname:pDepthStencilResolveAttachment is not `NULL` and does not have
    the value ename:VK_ATTACHMENT_UNUSED, pname:depthResolveMode and
    pname:stencilResolveMode must: not both be ename:VK_RESOLVE_MODE_NONE
  * [[VUID-VkSubpassDescriptionDepthStencilResolve-pDepthStencilResolveAttachment-03179]]
    If pname:pDepthStencilResolveAttachment is not `NULL` and does not have
    the value ename:VK_ATTACHMENT_UNUSED, pname:pDepthStencilAttachment
    must: not have a sample count of ename:VK_SAMPLE_COUNT_1_BIT
  * [[VUID-VkSubpassDescriptionDepthStencilResolve-pDepthStencilResolveAttachment-03180]]
    If pname:pDepthStencilResolveAttachment is not `NULL` and does not have
    the value ename:VK_ATTACHMENT_UNUSED,
    pname:pDepthStencilResolveAttachment must: have a sample count of
    ename:VK_SAMPLE_COUNT_1_BIT
  * [[VUID-VkSubpassDescriptionDepthStencilResolve-pDepthStencilResolveAttachment-02651]]
    If pname:pDepthStencilResolveAttachment is not `NULL` and does not have
    the value ename:VK_ATTACHMENT_UNUSED then it must: have an image format
    whose <<potential-format-features, potential format features>> contain
    ename:VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT
  * [[VUID-VkSubpassDescriptionDepthStencilResolve-pDepthStencilResolveAttachment-03181]]
    If the elink:VkFormat of pname:pDepthStencilResolveAttachment has a
    depth component, then the elink:VkFormat of
    pname:pDepthStencilAttachment must: have a depth component with the same
    number of bits and numerical type
  * [[VUID-VkSubpassDescriptionDepthStencilResolve-pDepthStencilResolveAttachment-03182]]
    If the elink:VkFormat of pname:pDepthStencilResolveAttachment has a
    stencil component, then the elink:VkFormat of
    pname:pDepthStencilAttachment must: have a stencil component with the
    same number of bits and numerical type
  * [[VUID-VkSubpassDescriptionDepthStencilResolve-depthResolveMode-03183]]
    The value of pname:depthResolveMode must: be one of the bits set in
    slink:VkPhysicalDeviceDepthStencilResolveProperties::pname:supportedDepthResolveModes
    or ename:VK_RESOLVE_MODE_NONE
  * [[VUID-VkSubpassDescriptionDepthStencilResolve-stencilResolveMode-03184]]
    The value of pname:stencilResolveMode must: be one of the bits set in
    slink:VkPhysicalDeviceDepthStencilResolveProperties::pname:supportedStencilResolveModes
    or ename:VK_RESOLVE_MODE_NONE
  * [[VUID-VkSubpassDescriptionDepthStencilResolve-pDepthStencilResolveAttachment-03185]]
    If the elink:VkFormat of pname:pDepthStencilResolveAttachment has both
    depth and stencil components,
    slink:VkPhysicalDeviceDepthStencilResolveProperties::pname:independentResolve
    is ename:VK_FALSE, and
    slink:VkPhysicalDeviceDepthStencilResolveProperties::pname:independentResolveNone
    is ename:VK_FALSE, then the values of pname:depthResolveMode and
    pname:stencilResolveMode must: be identical
  * [[VUID-VkSubpassDescriptionDepthStencilResolve-pDepthStencilResolveAttachment-03186]]
    If the elink:VkFormat of pname:pDepthStencilResolveAttachment has both
    depth and stencil components,
    slink:VkPhysicalDeviceDepthStencilResolveProperties::pname:independentResolve
    is ename:VK_FALSE and
    slink:VkPhysicalDeviceDepthStencilResolveProperties::pname:independentResolveNone
    is ename:VK_TRUE, then the values of pname:depthResolveMode and
    pname:stencilResolveMode must: be identical or one of them must: be
    ename:VK_RESOLVE_MODE_NONE
  * [[VUID-VkSubpassDescriptionDepthStencilResolve-pDepthStencilResolveAttachment-04588]]
    If the elink:VkFormat of pname:pDepthStencilResolveAttachment has a
    depth component, pname:depthResolveMode must: be a valid
    elink:VkResolveModeFlagBits value
  * [[VUID-VkSubpassDescriptionDepthStencilResolve-pDepthStencilResolveAttachment-04589]]
    If the elink:VkFormat of pname:pDepthStencilResolveAttachment has a
    stencil component, pname:stencilResolveMode must: be a valid
    elink:VkResolveModeFlagBits value
****

include::{generated}/validity/structs/VkSubpassDescriptionDepthStencilResolve.txt[]
--

[open,refpage='VkResolveModeFlagBits',desc='Bitmask indicating supported depth and stencil resolve modes',type='enums',alias='VkResolveModeFlagBitsKHR']
--
Possible values of
slink:VkSubpassDescriptionDepthStencilResolve::pname:depthResolveMode and
pname:stencilResolveMode, specifying the depth and stencil resolve modes,
are:

include::{generated}/api/enums/VkResolveModeFlagBits.txt[]

ifdef::VK_KHR_depth_stencil_resolve[]
or the equivalent

include::{generated}/api/enums/VkResolveModeFlagBitsKHR.txt[]
endif::VK_KHR_depth_stencil_resolve[]

  * ename:VK_RESOLVE_MODE_NONE indicates that no resolve operation is done.
  * ename:VK_RESOLVE_MODE_SAMPLE_ZERO_BIT indicates that result of the
    resolve operation is equal to the value of sample 0.
  * ename:VK_RESOLVE_MODE_AVERAGE_BIT indicates that result of the resolve
    operation is the average of the sample values.
  * ename:VK_RESOLVE_MODE_MIN_BIT indicates that result of the resolve
    operation is the minimum of the sample values.
  * ename:VK_RESOLVE_MODE_MAX_BIT indicates that result of the resolve
    operation is the maximum of the sample values.
--

[open,refpage='VkResolveModeFlags',desc='Bitmask of VkResolveModeFlagBits',type='flags',alias='VkResolveModeFlagsKHR']
--
include::{generated}/api/flags/VkResolveModeFlags.txt[]

ifdef::VK_KHR_depth_stencil_resolve[]
or the equivalent

include::{generated}/api/flags/VkResolveModeFlagsKHR.txt[]
endif::VK_KHR_depth_stencil_resolve[]

tname:VkResolveModeFlags is a bitmask type for setting a mask of zero or
more elink:VkResolveModeFlagBits.
--
endif::VK_VERSION_1_2,VK_KHR_depth_stencil_resolve[]


ifdef::VK_KHR_fragment_shading_rate[]
[open,refpage='VkFragmentShadingRateAttachmentInfoKHR',desc='Structure specifying a fragment shading rate attachment for a subpass',type='structs']
--
The sname:VkFragmentShadingRateAttachmentInfoKHR structure is defined as:

include::{generated}/api/structs/VkFragmentShadingRateAttachmentInfoKHR.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:pFragmentShadingRateAttachment is `NULL` or a pointer to a
    slink:VkAttachmentReference2 structure defining the fragment shading
    rate attachment for this subpass.
  * pname:shadingRateAttachmentTexelSize specifies the size of the portion
    of the framebuffer corresponding to each texel in
    pname:pFragmentShadingRateAttachment.

If no shading rate attachment is specified, or if this structure is not
specified, the implementation behaves as if a valid shading rate attachment
was specified with all texels specifying a single pixel per fragment.

.Valid Usage
****
  * [[VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04524]]
    If pname:pFragmentShadingRateAttachment is not `NULL` and its
    pname:attachment member is not ename:VK_ATTACHMENT_UNUSED, its
    pname:layout member must: be equal to ename:VK_IMAGE_LAYOUT_GENERAL or
    ename:VK_IMAGE_LAYOUT_FRAGMENT_SHADING_RATE_ATTACHMENT_OPTIMAL_KHR
  * [[VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04525]]
    If pname:pFragmentShadingRateAttachment is not `NULL` and its
    pname:attachment member is not ename:VK_ATTACHMENT_UNUSED,
    pname:shadingRateAttachmentTexelSize.width must: be a power of two value
  * [[VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04526]]
    If pname:pFragmentShadingRateAttachment is not `NULL` and its
    pname:attachment member is not ename:VK_ATTACHMENT_UNUSED,
    pname:shadingRateAttachmentTexelSize.width must: be less than or equal
    to <<limits-maxFragmentShadingRateAttachmentTexelSize,
    pname:maxFragmentShadingRateAttachmentTexelSize.width>>
  * [[VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04527]]
    If pname:pFragmentShadingRateAttachment is not `NULL` and its
    pname:attachment member is not ename:VK_ATTACHMENT_UNUSED,
    pname:shadingRateAttachmentTexelSize.width must: be greater than or
    equal to <<limits-minFragmentShadingRateAttachmentTexelSize,
    pname:minFragmentShadingRateAttachmentTexelSize.width>>
  * [[VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04528]]
    If pname:pFragmentShadingRateAttachment is not `NULL` and its
    pname:attachment member is not ename:VK_ATTACHMENT_UNUSED,
    pname:shadingRateAttachmentTexelSize.height must: be a power of two
    value
  * [[VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04529]]
    If pname:pFragmentShadingRateAttachment is not `NULL` and its
    pname:attachment member is not ename:VK_ATTACHMENT_UNUSED,
    pname:shadingRateAttachmentTexelSize.height must: be less than or equal
    to <<limits-maxFragmentShadingRateAttachmentTexelSize,
    pname:maxFragmentShadingRateAttachmentTexelSize.height>>
  * [[VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04530]]
    If pname:pFragmentShadingRateAttachment is not `NULL` and its
    pname:attachment member is not ename:VK_ATTACHMENT_UNUSED,
    pname:shadingRateAttachmentTexelSize.height must: be greater than or
    equal to <<limits-minFragmentShadingRateAttachmentTexelSize,
    pname:minFragmentShadingRateAttachmentTexelSize.height>>
  * [[VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04531]]
    If pname:pFragmentShadingRateAttachment is not `NULL` and its
    pname:attachment member is not ename:VK_ATTACHMENT_UNUSED, the quotient
    of pname:shadingRateAttachmentTexelSize.width and
    pname:shadingRateAttachmentTexelSize.height must: be less than or equal
    to <<limits-maxFragmentShadingRateAttachmentTexelSizeAspectRatio,
    pname:maxFragmentShadingRateAttachmentTexelSizeAspectRatio>>
  * [[VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04532]]
    If pname:pFragmentShadingRateAttachment is not `NULL` and its
    pname:attachment member is not ename:VK_ATTACHMENT_UNUSED, the quotient
    of pname:shadingRateAttachmentTexelSize.height and
    pname:shadingRateAttachmentTexelSize.width must: be less than or equal
    to <<limits-maxFragmentShadingRateAttachmentTexelSizeAspectRatio,
    pname:maxFragmentShadingRateAttachmentTexelSizeAspectRatio>>
****

include::{generated}/validity/structs/VkFragmentShadingRateAttachmentInfoKHR.txt[]
--
endif::VK_KHR_fragment_shading_rate[]

[open,refpage='VkAttachmentReference2',desc='Structure specifying an attachment reference',type='structs',alias='VkAttachmentReference2KHR']
--
The sname:VkAttachmentReference2 structure is defined as:

include::{generated}/api/structs/VkAttachmentReference2.txt[]

ifdef::VK_KHR_create_renderpass2[]
or the equivalent

include::{generated}/api/structs/VkAttachmentReference2KHR.txt[]
endif::VK_KHR_create_renderpass2[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:attachment is either an integer value identifying an attachment at
    the corresponding index in
    slink:VkRenderPassCreateInfo2::pname:pAttachments, or
    ename:VK_ATTACHMENT_UNUSED to signify that this attachment is not used.
  * pname:layout is a elink:VkImageLayout value specifying the layout the
    attachment uses during the subpass.
  * pname:aspectMask is a mask of which aspect(s) can: be accessed within
    the specified subpass as an input attachment.

Parameters defined by this structure with the same name as those in
slink:VkAttachmentReference have the identical effect to those parameters.

pname:aspectMask is ignored when this structure is used to describe anything
other than an input attachment reference.

ifdef::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
If the <<features-separateDepthStencilLayouts,
pname:separateDepthStencilLayouts>> feature is enabled, and pname:attachment
has a depth/stencil format, pname:layout can: be set to a layout that only
specifies the layout of the depth aspect.

If pname:layout only specifies the layout of the depth aspect of the
attachment, the layout of the stencil aspect is specified by the
pname:stencilLayout member of a slink:VkAttachmentReferenceStencilLayout
structure included in the pname:pNext chain.
Otherwise, pname:layout describes the layout for all relevant image aspects.
endif::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]

.Valid Usage
****
  * [[VUID-VkAttachmentReference2-layout-03077]]
    If pname:attachment is not ename:VK_ATTACHMENT_UNUSED, pname:layout
    must: not be ename:VK_IMAGE_LAYOUT_UNDEFINED,
    ename:VK_IMAGE_LAYOUT_PREINITIALIZED, or
    ename:VK_IMAGE_LAYOUT_PRESENT_SRC_KHR
ifdef::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
  * [[VUID-VkAttachmentReference2-separateDepthStencilLayouts-03313]]
    If the <<features-separateDepthStencilLayouts,
    pname:separateDepthStencilLayouts>> feature is not enabled, and
    pname:attachment is not ename:VK_ATTACHMENT_UNUSED, pname:layout must:
    not be ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL,
  * [[VUID-VkAttachmentReference2-attachment-04754]]
    If pname:attachment is not ename:VK_ATTACHMENT_UNUSED, and the format of
    the referenced attachment is a color format, pname:layout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentReference2-attachment-04755]]
    If pname:attachment is not ename:VK_ATTACHMENT_UNUSED, and the format of
    the referenced attachment is a depth/stencil format which includes both
    depth and stencil aspects, and pname:layout is
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL, the pname:pNext chain
    must: include a slink:VkAttachmentReferenceStencilLayout structure
  * [[VUID-VkAttachmentReference2-attachment-04756]]
    If pname:attachment is not ename:VK_ATTACHMENT_UNUSED, and the format of
    the referenced attachment is a depth/stencil format which includes only
    the depth aspect, pname:layout must: not be
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
  * [[VUID-VkAttachmentReference2-attachment-04757]]
    If pname:attachment is not ename:VK_ATTACHMENT_UNUSED, and the format of
    the referenced attachment is a depth/stencil format which includes only
    the stencil aspect, pname:layout must: not be
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL
endif::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
****

include::{generated}/validity/structs/VkAttachmentReference2.txt[]
--

ifdef::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
[open,refpage='VkAttachmentReferenceStencilLayout',desc='Structure specifying an attachment description',type='structs',alias='VkAttachmentReferenceStencilLayoutKHR']
--
The sname:VkAttachmentReferenceStencilLayout structure is defined as:

include::{generated}/api/structs/VkAttachmentReferenceStencilLayout.txt[]

ifdef::VK_KHR_separate_depth_stencil_layouts[]
or the equivalent

include::{generated}/api/structs/VkAttachmentReferenceStencilLayoutKHR.txt[]
endif::VK_KHR_separate_depth_stencil_layouts[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:stencilLayout is a elink:VkImageLayout value specifying the layout
    the stencil aspect of the attachment uses during the subpass.

.Valid Usage
****
  * [[VUID-VkAttachmentReferenceStencilLayout-stencilLayout-03318]]
    pname:stencilLayout must: not be ename:VK_IMAGE_LAYOUT_UNDEFINED,
    ename:VK_IMAGE_LAYOUT_PREINITIALIZED,
    ename:VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_PRESENT_SRC_KHR
****

include::{generated}/validity/structs/VkAttachmentReferenceStencilLayout.txt[]
--
endif::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]

[open,refpage='VkSubpassDependency2',desc='Structure specifying a subpass dependency',type='structs',alias='VkSubpassDependency2KHR']
--
The sname:VkSubpassDependency2 structure is defined as:

include::{generated}/api/structs/VkSubpassDependency2.txt[]

ifdef::VK_KHR_create_renderpass2[]
or the equivalent

include::{generated}/api/structs/VkSubpassDependency2KHR.txt[]
endif::VK_KHR_create_renderpass2[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:srcSubpass is the subpass index of the first subpass in the
    dependency, or ename:VK_SUBPASS_EXTERNAL.
  * pname:dstSubpass is the subpass index of the second subpass in the
    dependency, or ename:VK_SUBPASS_EXTERNAL.
  * pname:srcStageMask is a bitmask of elink:VkPipelineStageFlagBits
    specifying the <<synchronization-pipeline-stages-masks, source stage
    mask>>.
  * pname:dstStageMask is a bitmask of elink:VkPipelineStageFlagBits
    specifying the <<synchronization-pipeline-stages-masks, destination
    stage mask>>
  * pname:srcAccessMask is a bitmask of elink:VkAccessFlagBits specifying a
    <<synchronization-access-masks, source access mask>>.
  * pname:dstAccessMask is a bitmask of elink:VkAccessFlagBits specifying a
    <<synchronization-access-masks, destination access mask>>.
  * pname:dependencyFlags is a bitmask of elink:VkDependencyFlagBits.
  * pname:viewOffset controls which views in the source subpass the views in
    the destination subpass depend on.

Parameters defined by this structure with the same name as those in
slink:VkSubpassDependency have the identical effect to those parameters.

pname:viewOffset has the same effect for the described subpass dependency as
slink:VkRenderPassMultiviewCreateInfo::pname:pViewOffsets has on each
corresponding subpass dependency.

ifdef::VK_KHR_synchronization2[]
If a slink:VkMemoryBarrier2KHR structure is included in the pname:pNext
chain, pname:srcStageMask, pname:dstStageMask, pname:srcAccessMask, and
pname:dstAccessMask parameters are ignored.
The synchronization and access scopes instead are defined by the parameters
of slink:VkMemoryBarrier2KHR.
endif::VK_KHR_synchronization2[]

.Valid Usage
****
  * [[VUID-VkSubpassDependency2-srcStageMask-03080]]
    If the <<features-geometryShader,geometry shaders>> feature is not
    enabled, pname:srcStageMask must: not contain
    ename:VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT
  * [[VUID-VkSubpassDependency2-dstStageMask-03081]]
    If the <<features-geometryShader,geometry shaders>> feature is not
    enabled, pname:dstStageMask must: not contain
    ename:VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT
  * [[VUID-VkSubpassDependency2-srcStageMask-03082]]
    If the <<features-tessellationShader,tessellation shaders>> feature is
    not enabled, pname:srcStageMask must: not contain
    ename:VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT or
    ename:VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT
  * [[VUID-VkSubpassDependency2-dstStageMask-03083]]
    If the <<features-tessellationShader,tessellation shaders>> feature is
    not enabled, pname:dstStageMask must: not contain
    ename:VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT or
    ename:VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT
  * [[VUID-VkSubpassDependency2-srcSubpass-03084]]
    pname:srcSubpass must: be less than or equal to pname:dstSubpass, unless
    one of them is ename:VK_SUBPASS_EXTERNAL, to avoid cyclic dependencies
    and ensure a valid execution order
  * [[VUID-VkSubpassDependency2-srcSubpass-03085]]
    pname:srcSubpass and pname:dstSubpass must: not both be equal to
    ename:VK_SUBPASS_EXTERNAL
  * [[VUID-VkSubpassDependency2-srcSubpass-03087]]
    If pname:srcSubpass is equal to pname:dstSubpass and not all of the
    stages in pname:srcStageMask and pname:dstStageMask are
    <<synchronization-framebuffer-regions,framebuffer-space stages>>, the
    <<synchronization-pipeline-stages-order, logically latest>> pipeline
    stage in pname:srcStageMask must: be
    <<synchronization-pipeline-stages-order, logically earlier>> than or
    equal to the <<synchronization-pipeline-stages-order, logically
    earliest>> pipeline stage in pname:dstStageMask
  * [[VUID-VkSubpassDependency2-srcAccessMask-03088]]
    Any access flag included in pname:srcAccessMask must: be supported by
    one of the pipeline stages in pname:srcStageMask, as specified in the
    <<synchronization-access-types-supported, table of supported access
    types>>
  * [[VUID-VkSubpassDependency2-dstAccessMask-03089]]
    Any access flag included in pname:dstAccessMask must: be supported by
    one of the pipeline stages in pname:dstStageMask, as specified in the
    <<synchronization-access-types-supported, table of supported access
    types>>
  * [[VUID-VkSubpassDependency2-dependencyFlags-03090]]
    If pname:dependencyFlags includes ename:VK_DEPENDENCY_VIEW_LOCAL_BIT,
    pname:srcSubpass must: not be equal to ename:VK_SUBPASS_EXTERNAL
  * [[VUID-VkSubpassDependency2-dependencyFlags-03091]]
    If pname:dependencyFlags includes ename:VK_DEPENDENCY_VIEW_LOCAL_BIT,
    pname:dstSubpass must: not be equal to ename:VK_SUBPASS_EXTERNAL
  * [[VUID-VkSubpassDependency2-srcSubpass-02245]]
    If pname:srcSubpass equals pname:dstSubpass, and pname:srcStageMask and
    pname:dstStageMask both include a
    <<synchronization-framebuffer-regions,framebuffer-space stage>>, then
    pname:dependencyFlags must: include ename:VK_DEPENDENCY_BY_REGION_BIT
  * [[VUID-VkSubpassDependency2-viewOffset-02530]]
    If pname:viewOffset is not equal to `0`, pname:srcSubpass must: not be
    equal to pname:dstSubpass
  * [[VUID-VkSubpassDependency2-dependencyFlags-03092]]
    If pname:dependencyFlags does not include
    ename:VK_DEPENDENCY_VIEW_LOCAL_BIT, pname:viewOffset must: be `0`
ifdef::VK_NV_mesh_shader[]
  * [[VUID-VkSubpassDependency2-srcStageMask-02103]]
    If the <<features-meshShader,mesh shaders>> feature is not enabled,
    pname:srcStageMask must: not contain
    ename:VK_PIPELINE_STAGE_MESH_SHADER_BIT_NV
  * [[VUID-VkSubpassDependency2-srcStageMask-02104]]
    If the <<features-taskShader,task shaders>> feature is not enabled,
    pname:srcStageMask must: not contain
    ename:VK_PIPELINE_STAGE_TASK_SHADER_BIT_NV
  * [[VUID-VkSubpassDependency2-dstStageMask-02105]]
    If the <<features-meshShader,mesh shaders>> feature is not enabled,
    pname:dstStageMask must: not contain
    ename:VK_PIPELINE_STAGE_MESH_SHADER_BIT_NV
  * [[VUID-VkSubpassDependency2-dstStageMask-02106]]
    If the <<features-taskShader,task shaders>> feature is not enabled,
    pname:dstStageMask must: not contain
    ename:VK_PIPELINE_STAGE_TASK_SHADER_BIT_NV
endif::VK_NV_mesh_shader[]
ifdef::VK_KHR_synchronization2[]
  * [[VUID-VkSubpassDependency2-synchronization2-04988]]
    If the <<features-synchronization2, pname:synchronization2>> feature is
    not enabled, pname:srcStageMask must: not be `0`
  * [[VUID-VkSubpassDependency2-synchronization2-04989]]
    If the <<features-synchronization2, pname:synchronization2>> feature is
    not enabled, pname:dstStageMask must: not be `0`
endif::VK_KHR_synchronization2[]
ifndef::VK_KHR_synchronization2[]
  * [[VUID-VkSubpassDependency2-srcStageMask-04990]]
    pname:srcStageMask must: not be `0`
  * [[VUID-VkSubpassDependency2-dstStageMask-04991]]
    pname:dstStageMask must: not be `0`
endif::VK_KHR_synchronization2[]
****

include::{generated}/validity/structs/VkSubpassDependency2.txt[]
--
endif::VK_VERSION_1_2,VK_KHR_create_renderpass2[]

[open,refpage='vkDestroyRenderPass',desc='Destroy a render pass object',type='protos']
--
To destroy a render pass, call:

include::{generated}/api/protos/vkDestroyRenderPass.txt[]

  * pname:device is the logical device that destroys the render pass.
  * pname:renderPass is the handle of the render pass to destroy.
  * pname:pAllocator controls host memory allocation as described in the
    <<memory-allocation, Memory Allocation>> chapter.

.Valid Usage
****
  * [[VUID-vkDestroyRenderPass-renderPass-00873]]
    All submitted commands that refer to pname:renderPass must: have
    completed execution
  * [[VUID-vkDestroyRenderPass-renderPass-00874]]
    If sname:VkAllocationCallbacks were provided when pname:renderPass was
    created, a compatible set of callbacks must: be provided here
  * [[VUID-vkDestroyRenderPass-renderPass-00875]]
    If no sname:VkAllocationCallbacks were provided when pname:renderPass
    was created, pname:pAllocator must: be `NULL`
****

include::{generated}/validity/protos/vkDestroyRenderPass.txt[]
--


[[renderpass-compatibility]]
== Render Pass Compatibility

Framebuffers and graphics pipelines are created based on a specific render
pass object.
They must: only be used with that render pass object, or one compatible with
it.

Two attachment references are compatible if they have matching format and
sample count, or are both ename:VK_ATTACHMENT_UNUSED or the pointer that
would contain the reference is `NULL`.

Two arrays of attachment references are compatible if all corresponding
pairs of attachments are compatible.
If the arrays are of different lengths, attachment references not present in
the smaller array are treated as ename:VK_ATTACHMENT_UNUSED.

Two render passes are compatible if their corresponding color, input,
resolve, and depth/stencil attachment references are compatible and if they
are otherwise identical except for:

  * Initial and final image layout in attachment descriptions
  * Load and store operations in attachment descriptions
  * Image layout in attachment references

As an additional special case, if two render passes have a single subpass,
the resolve attachment reference
ifdef::VK_KHR_depth_stencil_resolve[]
and depth/stencil resolve mode
endif::VK_KHR_depth_stencil_resolve[]
compatibility requirements are ignored.

A framebuffer is compatible with a render pass if it was created using the
same render pass or a compatible render pass.


== Framebuffers

[open,refpage='VkFramebuffer',desc='Opaque handle to a framebuffer object',type='handles']
--
Render passes operate in conjunction with _framebuffers_.
Framebuffers represent a collection of specific memory attachments that a
render pass instance uses.

Framebuffers are represented by sname:VkFramebuffer handles:

include::{generated}/api/handles/VkFramebuffer.txt[]
--

[open,refpage='vkCreateFramebuffer',desc='Create a new framebuffer object',type='protos']
--
To create a framebuffer, call:

include::{generated}/api/protos/vkCreateFramebuffer.txt[]

  * pname:device is the logical device that creates the framebuffer.
  * pname:pCreateInfo is a pointer to a slink:VkFramebufferCreateInfo
    structure describing additional information about framebuffer creation.
  * pname:pAllocator controls host memory allocation as described in the
    <<memory-allocation, Memory Allocation>> chapter.
  * pname:pFramebuffer is a pointer to a slink:VkFramebuffer handle in which
    the resulting framebuffer object is returned.

.Valid Usage
****
  * [[VUID-vkCreateFramebuffer-pCreateInfo-02777]]
    If pname:pCreateInfo->flags does not include
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, and pname:attachmentCount is
    not `0`, each element of pname:pCreateInfo->pAttachments must: have been
    created on pname:device
****

include::{generated}/validity/protos/vkCreateFramebuffer.txt[]
--

[open,refpage='VkFramebufferCreateInfo',desc='Structure specifying parameters of a newly created framebuffer',type='structs']
--
The sname:VkFramebufferCreateInfo structure is defined as:

include::{generated}/api/structs/VkFramebufferCreateInfo.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:flags is a bitmask of elink:VkFramebufferCreateFlagBits
  * pname:renderPass is a render pass defining what render passes the
    framebuffer will be compatible with.
    See <<renderpass-compatibility,Render Pass Compatibility>> for details.
  * pname:attachmentCount is the number of attachments.
  * pname:pAttachments is a pointer to an array of slink:VkImageView
    handles, each of which will be used as the corresponding attachment in a
    render pass instance.
ifdef::VK_VERSION_1_2,VK_KHR_imageless_framebuffer[]
    If pname:flags includes ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, this
    parameter is ignored.
endif::VK_VERSION_1_2,VK_KHR_imageless_framebuffer[]
  * pname:width, pname:height and pname:layers define the dimensions of the
    framebuffer.
ifdef::VK_VERSION_1_1,VK_KHR_multiview[]
    If the render pass uses multiview, then pname:layers must: be one and
    each attachment requires a number of layers that is greater than the
    maximum bit index set in the view mask in the subpasses in which it is
    used.
endif::VK_VERSION_1_1,VK_KHR_multiview[]

Other than the exceptions listed below, applications must: ensure that all
accesses to memory that backs image subresources used as attachments in a
given render pass instance either happen-before the
<<renderpass-load-store-ops, load operations>> for those attachments, or
happen-after the <<renderpass-load-store-ops, store operations>> for those
attachments.

[[renderpass-attachment-nonattachment]]
The exceptions to the general rule are:

  * For depth/stencil attachments, an aspect can: be used separately as
    attachment and non-attachment if both accesses are read-only.
ifdef::VK_VERSION_1_1,VK_KHR_maintenance2[]
  * For depth/stencil attachments, each aspect can: be used separately as
    attachment and non-attachment as long as the non-attachment accesses are
    also via an image subresource in either the
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL layout
    or the ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL
    layout, and the attachment resource uses whichever of those two layouts
    the image accesses do not.
endif::VK_VERSION_1_1,VK_KHR_maintenance2[]

Use of non-attachment aspects in these cases is only well defined if the
attachment is used in the subpass where the non-attachment access is being
made, or the layout of the image subresource is constant throughout the
entire render pass instance, including the pname:initialLayout and
pname:finalLayout.

[NOTE]
.Note
====
ifndef::VK_VERSION_1_1,VK_KHR_maintenance2[]
This restriction means
endif::VK_VERSION_1_1,VK_KHR_maintenance2[]
ifdef::VK_VERSION_1_1,VK_KHR_maintenance2[]
These restrictions mean
endif::VK_VERSION_1_1,VK_KHR_maintenance2[]
that the render pass has full knowledge of all uses of all of the
attachments, so that the implementation is able to make correct decisions
about when and how to perform layout transitions, when to overlap execution
of subpasses, etc.
====

[[renderpass-noattachments]]
It is legal for a subpass to use no color or depth/stencil attachments,
either because it has no attachment references or because all of them are
ename:VK_ATTACHMENT_UNUSED.
This kind of subpass can: use shader side effects such as image stores and
atomics to produce an output.
In this case, the subpass continues to use the pname:width, pname:height,
and pname:layers of the framebuffer to define the dimensions of the
rendering area, and the pname:rasterizationSamples from each pipeline's
slink:VkPipelineMultisampleStateCreateInfo to define the number of samples
used in rasterization; however, if
slink:VkPhysicalDeviceFeatures::pname:variableMultisampleRate is
ename:VK_FALSE, then all pipelines to be bound with the subpass must: have
the same value for
slink:VkPipelineMultisampleStateCreateInfo::pname:rasterizationSamples.

.Valid Usage
****
  * [[VUID-VkFramebufferCreateInfo-attachmentCount-00876]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE, pname:attachmentCount
    must: be equal to the attachment count specified in pname:renderPass
  * [[VUID-VkFramebufferCreateInfo-flags-02778]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE, pname:flags does not
    include ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, and
    pname:attachmentCount is not `0`, pname:pAttachments must: be a valid
    pointer to an array of pname:attachmentCount valid slink:VkImageView
    handles
  * [[VUID-VkFramebufferCreateInfo-pAttachments-00877]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags does not
    include ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of
    pname:pAttachments that is used as a color attachment or resolve
    attachment by pname:renderPass must: have been created with a
    pname:usage value including ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT
  * [[VUID-VkFramebufferCreateInfo-pAttachments-02633]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags does not
    include ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of
    pname:pAttachments that is used as a depth/stencil attachment by
    pname:renderPass must: have been created with a pname:usage value
    including ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT
ifdef::VK_VERSION_1_2,VK_KHR_depth_stencil_resolve[]
  * [[VUID-VkFramebufferCreateInfo-pAttachments-02634]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags does not
    include ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of
    pname:pAttachments that is used as a depth/stencil resolve attachment by
    pname:renderPass must: have been created with a pname:usage value
    including ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT
endif::VK_VERSION_1_2,VK_KHR_depth_stencil_resolve[]
  * [[VUID-VkFramebufferCreateInfo-pAttachments-00879]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:renderpass is
    not dlink:VK_NULL_HANDLE, pname:flags does not include
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of
    pname:pAttachments that is used as an input attachment by
    pname:renderPass must: have been created with a pname:usage value
    including ename:VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT
ifdef::VK_EXT_fragment_density_map[]
  * [[VUID-VkFramebufferCreateInfo-pAttachments-02552]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE, each element of
    pname:pAttachments that is used as a fragment density map attachment by
    pname:renderPass must: not have been created with a pname:flags value
    including ename:VK_IMAGE_CREATE_SUBSAMPLED_BIT_EXT
  * [[VUID-VkFramebufferCreateInfo-renderPass-02553]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE, pname:renderPass has a
    fragment density map attachment, and
    <<features-fragmentDensityMapNonSubsampledImages,non-subsample image
    feature>> is not enabled, each element of pname:pAttachments must: have
    been created with a pname:flags value including
    ename:VK_IMAGE_CREATE_SUBSAMPLED_BIT_EXT unless that element is the
    fragment density map attachment
endif::VK_EXT_fragment_density_map[]
  * [[VUID-VkFramebufferCreateInfo-pAttachments-00880]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags does not
    include ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of
    pname:pAttachments must: have been created with a elink:VkFormat value
    that matches the elink:VkFormat specified by the corresponding
    sname:VkAttachmentDescription in pname:renderPass
  * [[VUID-VkFramebufferCreateInfo-pAttachments-00881]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags does not
    include ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of
    pname:pAttachments must: have been created with a pname:samples value
    that matches the pname:samples value specified by the corresponding
    sname:VkAttachmentDescription in pname:renderPass
  * [[VUID-VkFramebufferCreateInfo-flags-04533]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags does not
    include ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of
    pname:pAttachments that is used as an input, color, resolve, or
    depth/stencil attachment by pname:renderPass must: have been created
    with a slink:VkImageCreateInfo::pname:width greater than or equal to
    pname:width
  * [[VUID-VkFramebufferCreateInfo-flags-04534]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags does not
    include ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of
    pname:pAttachments that is used as an input, color, resolve, or
    depth/stencil attachment by pname:renderPass must: have been created
    with a slink:VkImageCreateInfo::pname:height greater than or equal to
    pname:height
  * [[VUID-VkFramebufferCreateInfo-flags-04535]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags does not
    include ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of
    pname:pAttachments that is used as an input, color, resolve, or
    depth/stencil attachment by pname:renderPass must: have been created
    with a slink:VkImageViewCreateInfo::pname:subresourceRange.layerCount
    greater than or equal to pname:layers
ifdef::VK_VERSION_1_1,VK_KHR_multiview[]
  * [[VUID-VkFramebufferCreateInfo-renderPass-04536]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:renderPass was
    specified with non-zero view masks, each element of pname:pAttachments
    that is used as an input, color, resolve, or depth/stencil attachment by
    pname:renderPass must: have a pname:layerCount greater than the index of
    the most significant bit set in any of those view masks
endif::VK_VERSION_1_1,VK_KHR_multiview[]
ifdef::VK_EXT_fragment_density_map[]
ifndef::VK_VERSION_1_1,VK_KHR_multiview[]
  * [[VUID-VkFramebufferCreateInfo-pAttachments-02744]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE, an element of
    pname:pAttachments that is referenced by
    pname:fragmentDensityMapAttachment must: have a pname:layerCount equal
    to `1`
endif::VK_VERSION_1_1,VK_KHR_multiview[]
ifdef::VK_VERSION_1_1,VK_KHR_multiview[]
  * [[VUID-VkFramebufferCreateInfo-renderPass-02746]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:renderPass was
    specified with non-zero view masks, each element of pname:pAttachments
    that is referenced by pname:fragmentDensityMapAttachment must: have a
    pname:layerCount equal to `1` or greater than the index of the most
    significant bit set in any of those view masks
  * [[VUID-VkFramebufferCreateInfo-renderPass-02747]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:renderPass was
    not specified with non-zero view masks, each element of
    pname:pAttachments that is referenced by
    pname:fragmentDensityMapAttachment must: have a pname:layerCount equal
    to `1`
endif::VK_VERSION_1_1,VK_KHR_multiview[]
  * [[VUID-VkFramebufferCreateInfo-pAttachments-02555]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags does not
    include ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, an element of
    pname:pAttachments that is referenced by
    pname:fragmentDensityMapAttachment must: have a width at least as large
    as
    latexmath:[\left\lceil{\frac{width}{maxFragmentDensityTexelSize_{width}}}\right\rceil]
  * [[VUID-VkFramebufferCreateInfo-pAttachments-02556]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags does not
    include ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, an element of
    pname:pAttachments that is referenced by
    pname:fragmentDensityMapAttachment must: have a height at least as large
    as
    latexmath:[\left\lceil{\frac{height}{maxFragmentDensityTexelSize_{height}}}\right\rceil]
endif::VK_EXT_fragment_density_map[]
ifdef::VK_KHR_fragment_shading_rate[]
ifdef::VK_VERSION_1_1,VK_KHR_multiview[]
  * [[VUID-VkFramebufferCreateInfo-flags-04537]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags does not
    include ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, and pname:renderPass
    was specified with non-zero view masks, each element of
    pname:pAttachments that is used as a
    <<primsrast-fragment-shading-rate-attachment,fragment shading rate
    attachment>> by pname:renderPass must: have a pname:layerCount that is
    either `1`, or greater than the index of the most significant bit set in
    any of those view masks
  * [[VUID-VkFramebufferCreateInfo-flags-04538]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags does not
    include ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, and pname:renderPass
    was not specified with non-zero view masks, each element of
    pname:pAttachments that is used as a
    <<primsrast-fragment-shading-rate-attachment,fragment shading rate
    attachment>> by pname:renderPass must: have a pname:layerCount that is
    either `1`, or greater than pname:layers
endif::VK_VERSION_1_1,VK_KHR_multiview[]
  * [[VUID-VkFramebufferCreateInfo-flags-04539]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags does not
    include ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, an element of
    pname:pAttachments that is used as a
    <<primsrast-fragment-shading-rate-attachment, fragment shading rate
    attachment>> must: have a width at least as large as
    [eq]#{lceil}pname:width / code:texelWidth{rceil}#, where code:texelWidth
    is the largest value of pname:shadingRateAttachmentTexelSize.width in a
    slink:VkFragmentShadingRateAttachmentInfoKHR which references that
    attachment
  * [[VUID-VkFramebufferCreateInfo-flags-04540]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags does not
    include ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, an element of
    pname:pAttachments that is used as a
    <<primsrast-fragment-shading-rate-attachment, fragment shading rate
    attachment>> must: have a height at least as large as
    [eq]#{lceil}pname:height / code:texelHeight{rceil}#, where
    code:texelHeight is the largest value of
    pname:shadingRateAttachmentTexelSize.height in a
    slink:VkFragmentShadingRateAttachmentInfoKHR which references that
    attachment
endif::VK_KHR_fragment_shading_rate[]
  * [[VUID-VkFramebufferCreateInfo-pAttachments-00883]]
    If pname:flags does not include
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of
    pname:pAttachments must: only specify a single mip level
  * [[VUID-VkFramebufferCreateInfo-pAttachments-00884]]
    If pname:flags does not include
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of
    pname:pAttachments must: have been created with the identity swizzle
  * [[VUID-VkFramebufferCreateInfo-width-00885]]
    pname:width must: be greater than `0`
  * [[VUID-VkFramebufferCreateInfo-width-00886]]
    pname:width must: be less than or equal to
    <<limits-maxFramebufferWidth,pname:maxFramebufferWidth>>
  * [[VUID-VkFramebufferCreateInfo-height-00887]]
    pname:height must: be greater than `0`
  * [[VUID-VkFramebufferCreateInfo-height-00888]]
    pname:height must: be less than or equal to
    <<limits-maxFramebufferHeight,pname:maxFramebufferHeight>>
  * [[VUID-VkFramebufferCreateInfo-layers-00889]]
    pname:layers must: be greater than `0`
  * [[VUID-VkFramebufferCreateInfo-layers-00890]]
    pname:layers must: be less than or equal to
    <<limits-maxFramebufferLayers,pname:maxFramebufferLayers>>
ifdef::VK_VERSION_1_1,VK_KHR_multiview[]
  * [[VUID-VkFramebufferCreateInfo-renderPass-02531]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:renderPass was
    specified with non-zero view masks, pname:layers must: be `1`
endif::VK_VERSION_1_1,VK_KHR_multiview[]
ifdef::VK_VERSION_1_1,VK_KHR_maintenance1[]
  * [[VUID-VkFramebufferCreateInfo-pAttachments-00891]]
    If pname:flags does not include
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of
    pname:pAttachments that is a 2D or 2D array image view taken from a 3D
    image must: not be a depth/stencil format
endif::VK_VERSION_1_1,VK_KHR_maintenance1[]
ifdef::VK_VERSION_1_2,VK_KHR_imageless_framebuffer[]
  * [[VUID-VkFramebufferCreateInfo-flags-03189]]
    If the <<features-imagelessFramebuffer, imageless framebuffer>> feature
    is not enabled, pname:flags must: not include
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT
  * [[VUID-VkFramebufferCreateInfo-flags-03190]]
    If pname:flags includes ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the
    pname:pNext chain must: include a
    slink:VkFramebufferAttachmentsCreateInfo structure
  * [[VUID-VkFramebufferCreateInfo-flags-03191]]
    If pname:flags includes ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the
    pname:attachmentImageInfoCount member of a
    slink:VkFramebufferAttachmentsCreateInfo structure in the pname:pNext
    chain must: be equal to either zero or pname:attachmentCount
  * [[VUID-VkFramebufferCreateInfo-flags-04541]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the pname:width member of any
    element of the pname:pAttachmentImageInfos member of a
    slink:VkFramebufferAttachmentsCreateInfo structure in the pname:pNext
    chain that is used as an input, color, resolve or depth/stencil
    attachment in pname:renderPass must: be greater than or equal to
    pname:width
  * [[VUID-VkFramebufferCreateInfo-flags-04542]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the pname:height member of
    any element of the pname:pAttachmentImageInfos member of a
    slink:VkFramebufferAttachmentsCreateInfo structure in the pname:pNext
    chain that is used as an input, color, resolve or depth/stencil
    attachment in pname:renderPass must: be greater than or equal to
    pname:height
ifdef::VK_EXT_fragment_density_map[]
  * [[VUID-VkFramebufferCreateInfo-flags-03196]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the pname:width member of any
    element of the pname:pAttachmentImageInfos member of a
    slink:VkFramebufferAttachmentsCreateInfo structure in the pname:pNext
    chain that is referenced by
    slink:VkRenderPassFragmentDensityMapCreateInfoEXT::pname:fragmentDensityMapAttachment
    in pname:renderPass must: be greater than or equal to
    latexmath:[\left\lceil{\frac{width}{maxFragmentDensityTexelSize_{width}}}\right\rceil]
  * [[VUID-VkFramebufferCreateInfo-flags-03197]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the pname:height member of
    any element of the pname:pAttachmentImageInfos member of a
    slink:VkFramebufferAttachmentsCreateInfo structure included in the
    pname:pNext chain that is referenced by
    slink:VkRenderPassFragmentDensityMapCreateInfoEXT::pname:fragmentDensityMapAttachment
    in pname:renderPass must: be greater than or equal to
    latexmath:[\left\lceil{\frac{height}{maxFragmentDensityTexelSize_{height}}}\right\rceil]
endif::VK_EXT_fragment_density_map[]
ifdef::VK_KHR_fragment_shading_rate[]
  * [[VUID-VkFramebufferCreateInfo-flags-04543]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the pname:width member of any
    element of the pname:pAttachmentImageInfos member of a
    slink:VkFramebufferAttachmentsCreateInfo structure in the pname:pNext
    chain that is used as a <<primsrast-fragment-shading-rate-attachment,
    fragment shading rate attachment>> must: be greater than or equal to
    [eq]#{lceil}pname:width / code:texelWidth{rceil}#, where code:texelWidth
    is the largest value of pname:shadingRateAttachmentTexelSize.width in a
    slink:VkFragmentShadingRateAttachmentInfoKHR which references that
    attachment
  * [[VUID-VkFramebufferCreateInfo-flags-04544]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the pname:height member of
    any element of the pname:pAttachmentImageInfos member of a
    slink:VkFramebufferAttachmentsCreateInfo structure in the pname:pNext
    chain that is used as a <<primsrast-fragment-shading-rate-attachment,
    fragment shading rate attachment>> must: be greater than or equal to
    [eq]#{lceil}pname:height / code:texelHeight{rceil}#, where
    code:texelHeight is the largest value of
    pname:shadingRateAttachmentTexelSize.height in a
    slink:VkFragmentShadingRateAttachmentInfoKHR which references that
    attachment
  * [[VUID-VkFramebufferCreateInfo-flags-04545]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the pname:layerCount member
    of any element of the pname:pAttachmentImageInfos member of a
    slink:VkFramebufferAttachmentsCreateInfo structure in the pname:pNext
    chain that is used as a <<primsrast-fragment-shading-rate-attachment,
    fragment shading rate attachment>> must: be either `1`, or greater than
    or equal to pname:layers
  * [[VUID-VkFramebufferCreateInfo-flags-04587]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE, pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, and pname:renderPass was
    specified with non-zero view masks, each element of pname:pAttachments
    that is used as a <<primsrast-fragment-shading-rate-attachment,fragment
    shading rate attachment>> by pname:renderPass must: have a
    pname:layerCount that is either `1`, or greater than the index of the
    most significant bit set in any of those view masks
endif::VK_KHR_fragment_shading_rate[]
ifdef::VK_VERSION_1_1,VK_KHR_multiview[]
  * [[VUID-VkFramebufferCreateInfo-renderPass-03198]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE, multiview is enabled
    for pname:renderPass, and pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the pname:layerCount member
    of any element of the pname:pAttachmentImageInfos member of a
    slink:VkFramebufferAttachmentsCreateInfo structure included in the
    pname:pNext chain used as an input, color, resolve, or depth/stencil
    attachment in pname:renderPass must: be greater than the maximum bit
    index set in the view mask in the subpasses in which it is used in
    pname:renderPass
  * [[VUID-VkFramebufferCreateInfo-renderPass-04546]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE, multiview is not
    enabled for pname:renderPass, and pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the pname:layerCount member
    of any element of the pname:pAttachmentImageInfos member of a
    slink:VkFramebufferAttachmentsCreateInfo structure included in the
    pname:pNext chain used as an input, color, resolve, or depth/stencil
    attachment in pname:renderPass must: be greater than or equal to
    pname:layers
endif::VK_VERSION_1_1,VK_KHR_multiview[]
ifndef::VK_VERSION_1_1+VK_KHR_multiview[]
  * [[VUID-VkFramebufferCreateInfo-flags-04547]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the pname:layerCount member
    of any element of the pname:pAttachmentImageInfos member of a
    slink:VkFramebufferAttachmentsCreateInfo structure included in the
    pname:pNext chain used as an input, color, resolve, or depth/stencil
    attachment in pname:pRenderPass must: be greater than or equal to
    pname:layers
endif::VK_VERSION_1_1+VK_KHR_multiview[]
  * [[VUID-VkFramebufferCreateInfo-flags-03201]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the pname:usage member of any
    element of the pname:pAttachmentImageInfos member of a
    slink:VkFramebufferAttachmentsCreateInfo structure included in the
    pname:pNext chain that refers to an attachment used as a color
    attachment or resolve attachment by pname:renderPass must: include
    ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT
  * [[VUID-VkFramebufferCreateInfo-flags-03202]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the pname:usage member of any
    element of the pname:pAttachmentImageInfos member of a
    slink:VkFramebufferAttachmentsCreateInfo structure included in the
    pname:pNext chain that refers to an attachment used as a depth/stencil
    attachment by pname:renderPass must: include
    ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT
ifdef::VK_KHR_depth_stencil_resolve[]
  * [[VUID-VkFramebufferCreateInfo-flags-03203]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the pname:usage member of any
    element of the pname:pAttachmentImageInfos member of a
    slink:VkFramebufferAttachmentsCreateInfo structure included in the
    pname:pNext chain that refers to an attachment used as a depth/stencil
    resolve attachment by pname:renderPass must: include
    ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT
endif::VK_KHR_depth_stencil_resolve[]
  * [[VUID-VkFramebufferCreateInfo-flags-03204]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the pname:usage member of any
    element of the pname:pAttachmentImageInfos member of a
    slink:VkFramebufferAttachmentsCreateInfo structure included in the
    pname:pNext chain that refers to an attachment used as an input
    attachment by pname:renderPass must: include
    ename:VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT
  * [[VUID-VkFramebufferCreateInfo-flags-03205]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, at least one element of the
    pname:pViewFormats member of any element of the
    pname:pAttachmentImageInfos member of a
    slink:VkFramebufferAttachmentsCreateInfo structure included in the
    pname:pNext chain must: be equal to the corresponding value of
    slink:VkAttachmentDescription::pname:format used to create
    pname:renderPass
endif::VK_VERSION_1_2,VK_KHR_imageless_framebuffer[]
  * [[VUID-VkFramebufferCreateInfo-flags-04113]]
    If pname:flags does not include
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of
    pname:pAttachments must: have been created with
    slink:VkImageViewCreateInfo::pname:viewType not equal to
    ename:VK_IMAGE_VIEW_TYPE_3D
ifdef::VK_KHR_fragment_shading_rate[]
  * [[VUID-VkFramebufferCreateInfo-flags-04548]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags does not
    include ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of
    pname:pAttachments that is used as a fragment shading rate attachment by
    pname:renderPass must: have been created with a pname:usage value
    including ename:VK_IMAGE_USAGE_FRAGMENT_SHADING_RATE_ATTACHMENT_BIT_KHR
ifdef::VK_VERSION_1_2,VK_KHR_imageless_framebuffer[]
  * [[VUID-VkFramebufferCreateInfo-flags-04549]]
    If pname:renderpass is not dlink:VK_NULL_HANDLE and pname:flags includes
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the pname:usage member of any
    element of the pname:pAttachmentImageInfos member of a
    slink:VkFramebufferAttachmentsCreateInfo structure included in the
    pname:pNext chain that refers to an attachment used as a fragment
    shading rate attachment by pname:renderPass must: include
    ename:VK_IMAGE_USAGE_FRAGMENT_SHADING_RATE_ATTACHMENT_BIT_KHR
endif::VK_VERSION_1_2,VK_KHR_imageless_framebuffer[]
endif::VK_KHR_fragment_shading_rate[]
****

include::{generated}/validity/structs/VkFramebufferCreateInfo.txt[]
--

ifdef::VK_VERSION_1_2,VK_KHR_imageless_framebuffer[]
[open,refpage='VkFramebufferAttachmentsCreateInfo',desc='Structure specifying parameters of images that will be used with a framebuffer',type='structs',alias='VkFramebufferAttachmentsCreateInfo']
--
The sname:VkFramebufferAttachmentsCreateInfo structure is defined as:

include::{generated}/api/structs/VkFramebufferAttachmentsCreateInfo.txt[]

ifdef::VK_KHR_imageless_framebuffer[]
or the equivalent

include::{generated}/api/structs/VkFramebufferAttachmentsCreateInfoKHR.txt[]
endif::VK_KHR_imageless_framebuffer[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:attachmentImageInfoCount is the number of attachments being
    described.
  * pname:pAttachmentImageInfos is a pointer to an array of
    slink:VkFramebufferAttachmentImageInfo structures, each of which
    describes a number of parameters of the corresponding attachment in a
    render pass instance.

include::{generated}/validity/structs/VkFramebufferAttachmentsCreateInfo.txt[]
--

[open,refpage='VkFramebufferAttachmentImageInfo',desc='Structure specifying parameters of an image that will be used with a framebuffer',type='structs',alias='VkFramebufferAttachmentImageInfoKHR']
--
The sname:VkFramebufferAttachmentImageInfo structure is defined as:

include::{generated}/api/structs/VkFramebufferAttachmentImageInfo.txt[]

ifdef::VK_KHR_imageless_framebuffer[]
or the equivalent

include::{generated}/api/structs/VkFramebufferAttachmentImageInfoKHR.txt[]
endif::VK_KHR_imageless_framebuffer[]


  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:flags is a bitmask of elink:VkImageCreateFlagBits, matching the
    value of slink:VkImageCreateInfo::pname:flags used to create an image
    that will be used with this framebuffer.
  * pname:usage is a bitmask of elink:VkImageUsageFlagBits, matching the
    value of slink:VkImageCreateInfo::pname:usage used to create an image
    used with this framebuffer.
  * pname:width is the width of the image view used for rendering.
  * pname:height is the height of the image view used for rendering.
  * pname:layerCount is the number of array layers of the image view used
    for rendering.
  * pname:viewFormatCount is the number of entries in the pname:pViewFormats
    array, matching the value of
    slink:VkImageFormatListCreateInfo::pname:viewFormatCount used to create
    an image used with this framebuffer.
  * pname:pViewFormats is a pointer to an array of elink:VkFormat values
    specifying all of the formats which can: be used when creating views of
    the image, matching the value of
    slink:VkImageFormatListCreateInfo::pname:pViewFormats used to create an
    image used with this framebuffer.

Images that can: be used with the framebuffer when beginning a render pass,
as specified by slink:VkRenderPassAttachmentBeginInfo, must: be created with
parameters that are identical to those specified here.


include::{generated}/validity/structs/VkFramebufferAttachmentImageInfo.txt[]
--
endif::VK_VERSION_1_2,VK_KHR_imageless_framebuffer[]


[open,refpage='VkFramebufferCreateFlagBits',desc='Bitmask specifying framebuffer properties',type='enums']
--
Bits which can: be set in slink:VkFramebufferCreateInfo::pname:flags to
specify options for framebuffers are:

include::{generated}/api/enums/VkFramebufferCreateFlagBits.txt[]

ifdef::VK_VERSION_1_2,VK_KHR_imageless_framebuffer[]
  * ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT specifies that image views are
    not specified, and only attachment compatibility information will be
    provided via a slink:VkFramebufferAttachmentImageInfo structure.
endif::VK_VERSION_1_2,VK_KHR_imageless_framebuffer[]

ifndef::VK_VERSION_1_2,VK_KHR_imageless_framebuffer[]
[NOTE]
.Note
====
All bits for this type are defined by extensions, and none of those
extensions are enabled in this build of the specification.
====
endif::VK_VERSION_1_2,VK_KHR_imageless_framebuffer[]
--

[open,refpage='VkFramebufferCreateFlags',desc='Bitmask of VkFramebufferCreateFlagBits',type='flags']
--
include::{generated}/api/flags/VkFramebufferCreateFlags.txt[]

tname:VkFramebufferCreateFlags is a bitmask type for setting a mask of zero
or more elink:VkFramebufferCreateFlagBits.
--

[open,refpage='vkDestroyFramebuffer',desc='Destroy a framebuffer object',type='protos']
--
To destroy a framebuffer, call:

include::{generated}/api/protos/vkDestroyFramebuffer.txt[]

  * pname:device is the logical device that destroys the framebuffer.
  * pname:framebuffer is the handle of the framebuffer to destroy.
  * pname:pAllocator controls host memory allocation as described in the
    <<memory-allocation, Memory Allocation>> chapter.

.Valid Usage
****
  * [[VUID-vkDestroyFramebuffer-framebuffer-00892]]
    All submitted commands that refer to pname:framebuffer must: have
    completed execution
  * [[VUID-vkDestroyFramebuffer-framebuffer-00893]]
    If sname:VkAllocationCallbacks were provided when pname:framebuffer was
    created, a compatible set of callbacks must: be provided here
  * [[VUID-vkDestroyFramebuffer-framebuffer-00894]]
    If no sname:VkAllocationCallbacks were provided when pname:framebuffer
    was created, pname:pAllocator must: be `NULL`
****

include::{generated}/validity/protos/vkDestroyFramebuffer.txt[]
--


[[renderpass-commands]]
== Render Pass Commands

An application records the commands for a render pass instance one subpass
at a time, by beginning a render pass instance, iterating over the subpasses
to record commands for that subpass, and then ending the render pass
instance.

[open,refpage='vkCmdBeginRenderPass',desc='Begin a new render pass',type='protos']
--
To begin a render pass instance, call:

include::{generated}/api/protos/vkCmdBeginRenderPass.txt[]

  * pname:commandBuffer is the command buffer in which to record the
    command.
  * pname:pRenderPassBegin is a pointer to a slink:VkRenderPassBeginInfo
    structure specifying the render pass to begin an instance of, and the
    framebuffer the instance uses.
  * pname:contents is a elink:VkSubpassContents value specifying how the
    commands in the first subpass will be provided.

After beginning a render pass instance, the command buffer is ready to
record the commands for the first subpass of that render pass.

.Valid Usage
****
  * [[VUID-vkCmdBeginRenderPass-initialLayout-00895]]
    If any of the pname:initialLayout or pname:finalLayout member of the
    sname:VkAttachmentDescription structures or the pname:layout member of
    the sname:VkAttachmentReference structures specified when creating the
    render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is ename:VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL
    then the corresponding attachment image view of the framebuffer
    specified in the pname:framebuffer member of pname:pRenderPassBegin
    must: have been created with a pname:usage value including
    ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT
// The VU below comes in an alternate version when the extension is
// enabled.
ifndef::VK_VERSION_1_1,VK_KHR_maintenance2[]
  * [[VUID-vkCmdBeginRenderPass-initialLayout-00896]]
    If any of the pname:initialLayout or pname:finalLayout member of the
    sname:VkAttachmentDescription structures or the pname:layout member of
    the sname:VkAttachmentReference structures specified when creating the
    render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL then the
    corresponding attachment image view of the framebuffer specified in the
    pname:framebuffer member of pname:pRenderPassBegin must: have been
    created with a pname:usage value including
    ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT
endif::VK_VERSION_1_1,VK_KHR_maintenance2[]
// The nested ifdefs are there in anticipation of the hoped-for day when the
// VU extractor and validation layers can handle VU with imbedded
// conditionals. They are commented out until then.
ifdef::VK_VERSION_1_1,VK_KHR_maintenance2[]
  * [[VUID-vkCmdBeginRenderPass-initialLayout-01758]]
    If any of the pname:initialLayout or pname:finalLayout member of the
    sname:VkAttachmentDescription structures or the pname:layout member of
    the sname:VkAttachmentReference structures specified when creating the
    render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is
// ifdef::VK_VERSION_1_1,VK_KHR_maintenance2[]
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL,
// endif::VK_VERSION_1_1,VK_KHR_maintenance2[]
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL then the
    corresponding attachment image view of the framebuffer specified in the
    pname:framebuffer member of pname:pRenderPassBegin must: have been
    created with a pname:usage value including
    ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT
ifdef::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
  * [[VUID-vkCmdBeginRenderPass-initialLayout-02842]]
    If any of the pname:initialLayout or pname:finalLayout member of the
    sname:VkAttachmentDescription structures or the pname:layout member of
    the sname:VkAttachmentReference structures specified when creating the
    render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL then the corresponding
    attachment image view of the framebuffer specified in the
    pname:framebuffer member of pname:pRenderPassBegin must: have been
    created with a pname:usage value including
    ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT
  * [[VUID-vkCmdBeginRenderPass-stencilInitialLayout-02843]]
    If any of the pname:stencilInitialLayout or pname:stencilFinalLayout
    member of the sname:VkAttachmentDescriptionStencilLayout structures or
    the pname:stencilLayout member of the
    sname:VkAttachmentReferenceStencilLayout structures specified when
    creating the render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL then the corresponding
    attachment image view of the framebuffer specified in the
    pname:framebuffer member of pname:pRenderPassBegin must: have been
    created with a pname:usage value including
    ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT
endif::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
endif::VK_VERSION_1_1,VK_KHR_maintenance2[]
  * [[VUID-vkCmdBeginRenderPass-initialLayout-00897]]
    If any of the pname:initialLayout or pname:finalLayout member of the
    sname:VkAttachmentDescription structures or the pname:layout member of
    the sname:VkAttachmentReference structures specified when creating the
    render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is ename:VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL
    then the corresponding attachment image view of the framebuffer
    specified in the pname:framebuffer member of pname:pRenderPassBegin
    must: have been created with a pname:usage value including
    ename:VK_IMAGE_USAGE_SAMPLED_BIT or
    ename:VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT
  * [[VUID-vkCmdBeginRenderPass-initialLayout-00898]]
    If any of the pname:initialLayout or pname:finalLayout member of the
    sname:VkAttachmentDescription structures or the pname:layout member of
    the sname:VkAttachmentReference structures specified when creating the
    render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is ename:VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL
    then the corresponding attachment image view of the framebuffer
    specified in the pname:framebuffer member of pname:pRenderPassBegin
    must: have been created with a pname:usage value including
    ename:VK_IMAGE_USAGE_TRANSFER_SRC_BIT
  * [[VUID-vkCmdBeginRenderPass-initialLayout-00899]]
    If any of the pname:initialLayout or pname:finalLayout member of the
    sname:VkAttachmentDescription structures or the pname:layout member of
    the sname:VkAttachmentReference structures specified when creating the
    render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is ename:VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL
    then the corresponding attachment image view of the framebuffer
    specified in the pname:framebuffer member of pname:pRenderPassBegin
    must: have been created with a pname:usage value including
    ename:VK_IMAGE_USAGE_TRANSFER_DST_BIT
  * [[VUID-vkCmdBeginRenderPass-initialLayout-00900]]
    If the pname:initialLayout member of any of the
    sname:VkAttachmentDescription structures specified when creating the
    render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is not ename:VK_IMAGE_LAYOUT_UNDEFINED, then each
    such pname:initialLayout must: be equal to the current layout of the
    corresponding attachment image subresource of the framebuffer specified
    in the pname:framebuffer member of pname:pRenderPassBegin
  * [[VUID-vkCmdBeginRenderPass-srcStageMask-00901]]
    The pname:srcStageMask and pname:dstStageMask members of any element of
    the pname:pDependencies member of slink:VkRenderPassCreateInfo used to
    create pname:renderPass must: be supported by the capabilities of the
    queue family identified by the pname:queueFamilyIndex member of the
    slink:VkCommandPoolCreateInfo used to create the command pool which
    pname:commandBuffer was allocated from
  * [[VUID-vkCmdBeginRenderPass-framebuffer-02532]]
    For any attachment in pname:framebuffer that is used by pname:renderPass
    and is bound to memory locations that are also bound to another
    attachment used by pname:renderPass, and if at least one of those uses
    causes either attachment to be written to, both attachments must: have
    had the ename:VK_ATTACHMENT_DESCRIPTION_MAY_ALIAS_BIT set
****

include::{generated}/validity/protos/vkCmdBeginRenderPass.txt[]
--

ifdef::VK_VERSION_1_2,VK_KHR_create_renderpass2[]
[open,refpage='vkCmdBeginRenderPass2',desc='Begin a new render pass',type='protos',alias='vkCmdBeginRenderPass2KHR']
--
Alternatively to begin a render pass, call:

ifdef::VK_VERSION_1_2[]
include::{generated}/api/protos/vkCmdBeginRenderPass2.txt[]
endif::VK_VERSION_1_2[]

ifdef::VK_VERSION_1_2+VK_KHR_create_renderpass2[or the equivalent command]

ifdef::VK_KHR_create_renderpass2[]
include::{generated}/api/protos/vkCmdBeginRenderPass2KHR.txt[]
endif::VK_KHR_create_renderpass2[]

  * pname:commandBuffer is the command buffer in which to record the
    command.
  * pname:pRenderPassBegin is a pointer to a slink:VkRenderPassBeginInfo
    structure specifying the render pass to begin an instance of, and the
    framebuffer the instance uses.
  * pname:pSubpassBeginInfo is a pointer to a slink:VkSubpassBeginInfo
    structure containing information about the subpass which is about to
    begin rendering.

After beginning a render pass instance, the command buffer is ready to
record the commands for the first subpass of that render pass.

.Valid Usage
****
  * [[VUID-vkCmdBeginRenderPass2-framebuffer-02779]]
    Both the pname:framebuffer and pname:renderPass members of
    pname:pRenderPassBegin must: have been created on the same
    slink:VkDevice that pname:commandBuffer was allocated on
  * [[VUID-vkCmdBeginRenderPass2-initialLayout-03094]]
    If any of the pname:initialLayout or pname:finalLayout member of the
    sname:VkAttachmentDescription structures or the pname:layout member of
    the sname:VkAttachmentReference structures specified when creating the
    render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is ename:VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL
    then the corresponding attachment image view of the framebuffer
    specified in the pname:framebuffer member of pname:pRenderPassBegin
    must: have been created with a pname:usage value including
    ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT
  * [[VUID-vkCmdBeginRenderPass2-initialLayout-03096]]
    If any of the pname:initialLayout or pname:finalLayout member of the
    sname:VkAttachmentDescription structures or the pname:layout member of
    the sname:VkAttachmentReference structures specified when creating the
    render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL then the
    corresponding attachment image view of the framebuffer specified in the
    pname:framebuffer member of pname:pRenderPassBegin must: have been
    created with a pname:usage value including
    ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT
ifdef::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
  * [[VUID-vkCmdBeginRenderPass2-initialLayout-02844]]
    If any of the pname:initialLayout or pname:finalLayout member of the
    sname:VkAttachmentDescription structures or the pname:layout member of
    the sname:VkAttachmentReference structures specified when creating the
    render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is
    ename:VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL,
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL then the corresponding
    attachment image view of the framebuffer specified in the
    pname:framebuffer member of pname:pRenderPassBegin must: have been
    created with a pname:usage value including
    ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT
  * [[VUID-vkCmdBeginRenderPass2-stencilInitialLayout-02845]]
    If any of the pname:stencilInitialLayout or pname:stencilFinalLayout
    member of the sname:VkAttachmentDescriptionStencilLayout structures or
    the pname:stencilLayout member of the
    sname:VkAttachmentReferenceStencilLayout structures specified when
    creating the render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is
    ename:VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL, or
    ename:VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL then the corresponding
    attachment image view of the framebuffer specified in the
    pname:framebuffer member of pname:pRenderPassBegin must: have been
    created with a pname:usage value including
    ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT
endif::VK_VERSION_1_2,VK_KHR_separate_depth_stencil_layouts[]
  * [[VUID-vkCmdBeginRenderPass2-initialLayout-03097]]
    If any of the pname:initialLayout or pname:finalLayout member of the
    sname:VkAttachmentDescription structures or the pname:layout member of
    the sname:VkAttachmentReference structures specified when creating the
    render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is ename:VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL
    then the corresponding attachment image view of the framebuffer
    specified in the pname:framebuffer member of pname:pRenderPassBegin
    must: have been created with a pname:usage value including
    ename:VK_IMAGE_USAGE_SAMPLED_BIT or
    ename:VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT
  * [[VUID-vkCmdBeginRenderPass2-initialLayout-03098]]
    If any of the pname:initialLayout or pname:finalLayout member of the
    sname:VkAttachmentDescription structures or the pname:layout member of
    the sname:VkAttachmentReference structures specified when creating the
    render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is ename:VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL
    then the corresponding attachment image view of the framebuffer
    specified in the pname:framebuffer member of pname:pRenderPassBegin
    must: have been created with a pname:usage value including
    ename:VK_IMAGE_USAGE_TRANSFER_SRC_BIT
  * [[VUID-vkCmdBeginRenderPass2-initialLayout-03099]]
    If any of the pname:initialLayout or pname:finalLayout member of the
    sname:VkAttachmentDescription structures or the pname:layout member of
    the sname:VkAttachmentReference structures specified when creating the
    render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is ename:VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL
    then the corresponding attachment image view of the framebuffer
    specified in the pname:framebuffer member of pname:pRenderPassBegin
    must: have been created with a pname:usage value including
    ename:VK_IMAGE_USAGE_TRANSFER_DST_BIT
  * [[VUID-vkCmdBeginRenderPass2-initialLayout-03100]]
    If the pname:initialLayout member of any of the
    sname:VkAttachmentDescription structures specified when creating the
    render pass specified in the pname:renderPass member of
    pname:pRenderPassBegin is not ename:VK_IMAGE_LAYOUT_UNDEFINED, then each
    such pname:initialLayout must: be equal to the current layout of the
    corresponding attachment image subresource of the framebuffer specified
    in the pname:framebuffer member of pname:pRenderPassBegin
  * [[VUID-vkCmdBeginRenderPass2-srcStageMask-03101]]
    The pname:srcStageMask and pname:dstStageMask members of any element of
    the pname:pDependencies member of slink:VkRenderPassCreateInfo used to
    create pname:renderPass must: be supported by the capabilities of the
    queue family identified by the pname:queueFamilyIndex member of the
    slink:VkCommandPoolCreateInfo used to create the command pool which
    pname:commandBuffer was allocated from
  * [[VUID-vkCmdBeginRenderPass2-framebuffer-02533]]
    For any attachment in pname:framebuffer that is used by pname:renderPass
    and is bound to memory locations that are also bound to another
    attachment used by pname:renderPass, and if at least one of those uses
    causes either attachment to be written to, both attachments must: have
    had the ename:VK_ATTACHMENT_DESCRIPTION_MAY_ALIAS_BIT set
****

include::{generated}/validity/protos/vkCmdBeginRenderPass2.txt[]
--
endif::VK_VERSION_1_2,VK_KHR_create_renderpass2[]

[open,refpage='VkRenderPassBeginInfo',desc='Structure specifying render pass begin information',type='structs']
--
The sname:VkRenderPassBeginInfo structure is defined as:

include::{generated}/api/structs/VkRenderPassBeginInfo.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:renderPass is the render pass to begin an instance of.
  * pname:framebuffer is the framebuffer containing the attachments that are
    used with the render pass.
  * pname:renderArea is the render area that is affected by the render pass
    instance, and is described in more detail below.
  * pname:clearValueCount is the number of elements in pname:pClearValues.
  * pname:pClearValues is a pointer to an array of pname:clearValueCount
    slink:VkClearValue structures that contains clear values for each
    attachment, if the attachment uses a pname:loadOp value of
    ename:VK_ATTACHMENT_LOAD_OP_CLEAR or if the attachment has a
    depth/stencil format and uses a pname:stencilLoadOp value of
    ename:VK_ATTACHMENT_LOAD_OP_CLEAR.
    The array is indexed by attachment number.
    Only elements corresponding to cleared attachments are used.
    Other elements of pname:pClearValues are ignored.

pname:renderArea is the render area that is affected by the render pass
instance.
The effects of attachment load, store and multisample resolve operations are
restricted to the pixels whose x and y coordinates fall within the render
area on all attachments.
The render area extends to all layers of pname:framebuffer.
The application must: ensure (using scissor if necessary) that all rendering
is contained within the render area.
ifndef::VK_QCOM_render_pass_transform[]
The render area must: be contained within the framebuffer dimensions.
endif::VK_QCOM_render_pass_transform[]
ifdef::VK_QCOM_render_pass_transform[]
The render area, after any transform specified by
slink:VkRenderPassTransformBeginInfoQCOM::pname:transform is applied, must:
be contained within the framebuffer dimensions.
endif::VK_QCOM_render_pass_transform[]

ifdef::VK_QCOM_render_pass_transform[]
If <<vertexpostproc-renderpass-transform, render pass transform>> is
enabled, then pname:renderArea must: equal the framebuffer pre-transformed
dimensions.
After pname:renderArea has been transformed by
slink:VkRenderPassTransformBeginInfoQCOM::pname:transform, the resulting
render area must: be equal to the framebuffer dimensions.
endif::VK_QCOM_render_pass_transform[]

ifdef::VK_HUAWEI_subpass_shading[]
If <<features-subpassShading, subpass shading>> is enabled, then
pname:renderArea must: equal the framebuffer dimensions.
endif::VK_HUAWEI_subpass_shading[]

ifdef::VK_VERSION_1_1,VK_KHR_multiview[]

When multiview is enabled, the resolve operation at the end of a subpass
applies to all views in the view mask.

endif::VK_VERSION_1_1,VK_KHR_multiview[]

[NOTE]
.Note
====
There may: be a performance cost for using a render area smaller than the
framebuffer, unless it matches the render area granularity for the render
pass.
====

.Valid Usage
****
  * [[VUID-VkRenderPassBeginInfo-clearValueCount-00902]]
    pname:clearValueCount must: be greater than the largest attachment index
    in pname:renderPass that specifies a pname:loadOp (or
    pname:stencilLoadOp, if the attachment has a depth/stencil format) of
    ename:VK_ATTACHMENT_LOAD_OP_CLEAR
  * [[VUID-VkRenderPassBeginInfo-clearValueCount-04962]]
    If pname:clearValueCount is not `0`, pname:pClearValues must: be a valid
    pointer to an array of pname:clearValueCount slink:VkClearValue unions
  * [[VUID-VkRenderPassBeginInfo-renderPass-00904]]
    pname:renderPass must: be <<renderpass-compatibility,compatible>> with
    the pname:renderPass member of the slink:VkFramebufferCreateInfo
    structure specified when creating pname:framebuffer
ifndef::VK_VERSION_1_1,VK_KHR_device_group[]
  * [[VUID-VkRenderPassBeginInfo-renderArea-02846]]
    pname:renderArea.offset.x must: be greater than or equal to 0
  * [[VUID-VkRenderPassBeginInfo-renderArea-02847]]
    pname:renderArea.offset.y must: be greater than or equal to 0
  * [[VUID-VkRenderPassBeginInfo-renderArea-02848]]
    [eq]#pname:renderArea.offset.x {plus} pname:renderArea.extent.width#
    must: be less than or equal to
    slink:VkFramebufferCreateInfo::pname:width the pname:framebuffer was
    created with
  * [[VUID-VkRenderPassBeginInfo-renderArea-02849]]
    [eq]#pname:renderArea.offset.y {plus} pname:renderArea.extent.height#
    must: be less than or equal to
    slink:VkFramebufferCreateInfo::pname:height the pname:framebuffer was
    created with
endif::VK_VERSION_1_1,VK_KHR_device_group[]
ifdef::VK_VERSION_1_1,VK_KHR_device_group[]
  * [[VUID-VkRenderPassBeginInfo-pNext-02850]]
    If the pname:pNext chain does not contain
    slink:VkDeviceGroupRenderPassBeginInfo or its
    pname:deviceRenderAreaCount member is equal to 0,
    pname:renderArea.offset.x must: be greater than or equal to 0
  * [[VUID-VkRenderPassBeginInfo-pNext-02851]]
    If the pname:pNext chain does not contain
    slink:VkDeviceGroupRenderPassBeginInfo or its
    pname:deviceRenderAreaCount member is equal to 0,
    pname:renderArea.offset.y must: be greater than or equal to 0
  * [[VUID-VkRenderPassBeginInfo-pNext-02852]]
    If the pname:pNext chain does not contain
    slink:VkDeviceGroupRenderPassBeginInfo or its
    pname:deviceRenderAreaCount member is equal to 0,
    [eq]#pname:renderArea.offset.x {plus} pname:renderArea.extent.width#
    must: be less than or equal to
    slink:VkFramebufferCreateInfo::pname:width the pname:framebuffer was
    created with
  * [[VUID-VkRenderPassBeginInfo-pNext-02853]]
    If the pname:pNext chain does not contain
    slink:VkDeviceGroupRenderPassBeginInfo or its
    pname:deviceRenderAreaCount member is equal to 0,
    [eq]#pname:renderArea.offset.y {plus} pname:renderArea.extent.height#
    must: be less than or equal to
    slink:VkFramebufferCreateInfo::pname:height the pname:framebuffer was
    created with
  * [[VUID-VkRenderPassBeginInfo-pNext-02854]]
    If the pname:pNext chain contains
    slink:VkDeviceGroupRenderPassBeginInfo, the pname:offset.x member of
    each element of pname:pDeviceRenderAreas must: be greater than or equal
    to 0
  * [[VUID-VkRenderPassBeginInfo-pNext-02855]]
    If the pname:pNext chain contains
    slink:VkDeviceGroupRenderPassBeginInfo, the pname:offset.y member of
    each element of pname:pDeviceRenderAreas must: be greater than or equal
    to 0
  * [[VUID-VkRenderPassBeginInfo-pNext-02856]]
    If the pname:pNext chain contains
    slink:VkDeviceGroupRenderPassBeginInfo, [eq]#pname:offset.x {plus}
    pname:extent.width# of each element of pname:pDeviceRenderAreas must: be
    less than or equal to slink:VkFramebufferCreateInfo::pname:width the
    pname:framebuffer was created with
  * [[VUID-VkRenderPassBeginInfo-pNext-02857]]
    If the pname:pNext chain contains
    slink:VkDeviceGroupRenderPassBeginInfo, [eq]#pname:offset.y {plus}
    pname:extent.height# of each element of pname:pDeviceRenderAreas must:
    be less than or equal to slink:VkFramebufferCreateInfo::pname:height the
    pname:framebuffer was created with
endif::VK_VERSION_1_1,VK_KHR_device_group[]
ifdef::VK_VERSION_1_2,VK_KHR_imageless_framebuffer[]
  * [[VUID-VkRenderPassBeginInfo-framebuffer-03207]]
    If pname:framebuffer was created with a
    slink:VkFramebufferCreateInfo::pname:flags value that did not include
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, and the pname:pNext chain
    includes a slink:VkRenderPassAttachmentBeginInfo structure, its
    pname:attachmentCount must: be zero
  * [[VUID-VkRenderPassBeginInfo-framebuffer-03208]]
    If pname:framebuffer was created with a
    slink:VkFramebufferCreateInfo::pname:flags value that included
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, the pname:attachmentCount of
    a slink:VkRenderPassAttachmentBeginInfo structure included in the
    pname:pNext chain must: be equal to the value of
    slink:VkFramebufferAttachmentsCreateInfo::pname:attachmentImageInfoCount
    used to create pname:framebuffer
  * [[VUID-VkRenderPassBeginInfo-framebuffer-02780]]
    If pname:framebuffer was created with a
    slink:VkFramebufferCreateInfo::pname:flags value that included
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of the
    pname:pAttachments member of a slink:VkRenderPassAttachmentBeginInfo
    structure included in the pname:pNext chain must: have been created on
    the same slink:VkDevice as pname:framebuffer and pname:renderPass
  * [[VUID-VkRenderPassBeginInfo-framebuffer-03209]]
    If pname:framebuffer was created with a
    slink:VkFramebufferCreateInfo::pname:flags value that included
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of the
    pname:pAttachments member of a slink:VkRenderPassAttachmentBeginInfo
    structure included in the pname:pNext chain must: be a slink:VkImageView
    of an image created with a value of slink:VkImageCreateInfo::pname:flags
    equal to the pname:flags member of the corresponding element of
    slink:VkFramebufferAttachmentsCreateInfo::pname:pAttachmentImageInfos
    used to create pname:framebuffer
  * [[VUID-VkRenderPassBeginInfo-framebuffer-04627]]
    If pname:framebuffer was created with a
    slink:VkFramebufferCreateInfo::pname:flags value that included
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of the
    pname:pAttachments member of a slink:VkRenderPassAttachmentBeginInfo
    structure included in the pname:pNext chain must: be a slink:VkImageView
    with <<resources-image-inherited-usage, an inherited usage>> equal to
    the pname:usage member of the corresponding element of
    slink:VkFramebufferAttachmentsCreateInfo::pname:pAttachmentImageInfos
    used to create pname:framebuffer
  * [[VUID-VkRenderPassBeginInfo-framebuffer-03211]]
    If pname:framebuffer was created with a
    slink:VkFramebufferCreateInfo::pname:flags value that included
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of the
    pname:pAttachments member of a slink:VkRenderPassAttachmentBeginInfo
    structure included in the pname:pNext chain must: be a slink:VkImageView
    with a width equal to the pname:width member of the corresponding
    element of
    slink:VkFramebufferAttachmentsCreateInfo::pname:pAttachmentImageInfos
    used to create pname:framebuffer
  * [[VUID-VkRenderPassBeginInfo-framebuffer-03212]]
    If pname:framebuffer was created with a
    slink:VkFramebufferCreateInfo::pname:flags value that included
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of the
    pname:pAttachments member of a slink:VkRenderPassAttachmentBeginInfo
    structure included in the pname:pNext chain must: be a slink:VkImageView
    with a height equal to the pname:height member of the corresponding
    element of
    slink:VkFramebufferAttachmentsCreateInfo::pname:pAttachmentImageInfos
    used to create pname:framebuffer
  * [[VUID-VkRenderPassBeginInfo-framebuffer-03213]]
    If pname:framebuffer was created with a
    slink:VkFramebufferCreateInfo::pname:flags value that included
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of the
    pname:pAttachments member of a slink:VkRenderPassAttachmentBeginInfo
    structure included in the pname:pNext chain must: be a slink:VkImageView
    of an image created with a value of
    slink:VkImageViewCreateInfo::pname:subresourceRange.layerCount equal to
    the pname:layerCount member of the corresponding element of
    slink:VkFramebufferAttachmentsCreateInfo::pname:pAttachmentImageInfos
    used to create pname:framebuffer
  * [[VUID-VkRenderPassBeginInfo-framebuffer-03214]]
    If pname:framebuffer was created with a
    slink:VkFramebufferCreateInfo::pname:flags value that included
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of the
    pname:pAttachments member of a slink:VkRenderPassAttachmentBeginInfo
    structure included in the pname:pNext chain must: be a slink:VkImageView
    of an image created with a value of
    slink:VkImageFormatListCreateInfo::pname:viewFormatCount equal to the
    pname:viewFormatCount member of the corresponding element of
    slink:VkFramebufferAttachmentsCreateInfo::pname:pAttachmentImageInfos
    used to create pname:framebuffer
  * [[VUID-VkRenderPassBeginInfo-framebuffer-03215]]
    If pname:framebuffer was created with a
    slink:VkFramebufferCreateInfo::pname:flags value that included
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of the
    pname:pAttachments member of a slink:VkRenderPassAttachmentBeginInfo
    structure included in the pname:pNext chain must: be a slink:VkImageView
    of an image created with a set of elements in
    slink:VkImageFormatListCreateInfo::pname:pViewFormats equal to the set
    of elements in the pname:pViewFormats member of the corresponding
    element of
    slink:VkFramebufferAttachmentsCreateInfo::pname:pAttachmentImageInfos
    used to create pname:framebuffer
  * [[VUID-VkRenderPassBeginInfo-framebuffer-03216]]
    If pname:framebuffer was created with a
    slink:VkFramebufferCreateInfo::pname:flags value that included
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of the
    pname:pAttachments member of a slink:VkRenderPassAttachmentBeginInfo
    structure included in the pname:pNext chain must: be a slink:VkImageView
    of an image created with a value of
    slink:VkImageViewCreateInfo::pname:format equal to the corresponding
    value of slink:VkAttachmentDescription::pname:format in pname:renderPass
  * [[VUID-VkRenderPassBeginInfo-framebuffer-03217]]
    If pname:framebuffer was created with a
    slink:VkFramebufferCreateInfo::pname:flags value that included
    ename:VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT, each element of the
    pname:pAttachments member of a slink:VkRenderPassAttachmentBeginInfo
    structure included in the pname:pNext chain must: be a slink:VkImageView
    of an image created with a value of
    slink:VkImageCreateInfo::pname:samples equal to the corresponding value
    of slink:VkAttachmentDescription::pname:samples in pname:renderPass
endif::VK_VERSION_1_2,VK_KHR_imageless_framebuffer[]
ifdef::VK_QCOM_render_pass_transform[]
  * [[VUID-VkRenderPassBeginInfo-pNext-02869]]
    If the pname:pNext chain includes
    slink:VkRenderPassTransformBeginInfoQCOM, pname:renderArea.offset must:
    equal (0,0)
  * [[VUID-VkRenderPassBeginInfo-pNext-02870]]
    If the pname:pNext chain includes
    slink:VkRenderPassTransformBeginInfoQCOM, pname:renderArea.extent
    transformed by slink:VkRenderPassTransformBeginInfoQCOM::pname:transform
    must: equal the pname:framebuffer dimensions
endif::VK_QCOM_render_pass_transform[]
****

include::{generated}/validity/structs/VkRenderPassBeginInfo.txt[]
--

ifdef::VK_EXT_sample_locations[]
[open,refpage='VkRenderPassSampleLocationsBeginInfoEXT',desc='Structure specifying sample locations to use for the layout transition of custom sample locations compatible depth/stencil attachments',type='structs']
--
The image layout of the depth aspect of a depth/stencil attachment referring
to an image created with
ename:VK_IMAGE_CREATE_SAMPLE_LOCATIONS_COMPATIBLE_DEPTH_BIT_EXT is dependent
on the last sample locations used to render to the image subresource, thus
preserving the contents of such depth/stencil attachments across subpass
boundaries requires the application to specify these sample locations
whenever a layout transition of the attachment may: occur.
This information can: be provided by adding a
sname:VkRenderPassSampleLocationsBeginInfoEXT structure to the pname:pNext
chain of sname:VkRenderPassBeginInfo.

The sname:VkRenderPassSampleLocationsBeginInfoEXT structure is defined as:

include::{generated}/api/structs/VkRenderPassSampleLocationsBeginInfoEXT.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:attachmentInitialSampleLocationsCount is the number of elements in
    the pname:pAttachmentInitialSampleLocations array.
  * pname:pAttachmentInitialSampleLocations is a pointer to an array of
    pname:attachmentInitialSampleLocationsCount
    slink:VkAttachmentSampleLocationsEXT structures specifying the
    attachment indices and their corresponding sample location state.
    Each element of pname:pAttachmentInitialSampleLocations can: specify the
    sample location state to use in the automatic layout transition
    performed to transition a depth/stencil attachment from the initial
    layout of the attachment to the image layout specified for the
    attachment in the first subpass using it.
  * pname:postSubpassSampleLocationsCount is the number of elements in the
    pname:pPostSubpassSampleLocations array.
  * pname:pPostSubpassSampleLocations is a pointer to an array of
    pname:postSubpassSampleLocationsCount slink:VkSubpassSampleLocationsEXT
    structures specifying the subpass indices and their corresponding sample
    location state.
    Each element of pname:pPostSubpassSampleLocations can: specify the
    sample location state to use in the automatic layout transition
    performed to transition the depth/stencil attachment used by the
    specified subpass to the image layout specified in a dependent subpass
    or to the final layout of the attachment in case the specified subpass
    is the last subpass using that attachment.
    In addition, if
    slink:VkPhysicalDeviceSampleLocationsPropertiesEXT::pname:variableSampleLocations
    is ename:VK_FALSE, each element of pname:pPostSubpassSampleLocations
    must: specify the sample location state that matches the sample
    locations used by all pipelines that will be bound to a command buffer
    during the specified subpass.
    If pname:variableSampleLocations is ename:VK_TRUE, the sample locations
    used for rasterization do not depend on
    pname:pPostSubpassSampleLocations.

include::{generated}/validity/structs/VkRenderPassSampleLocationsBeginInfoEXT.txt[]
--

[open,refpage='VkAttachmentSampleLocationsEXT',desc='Structure specifying the sample locations state to use in the initial layout transition of attachments',type='structs']
--
The sname:VkAttachmentSampleLocationsEXT structure is defined as:

include::{generated}/api/structs/VkAttachmentSampleLocationsEXT.txt[]

  * pname:attachmentIndex is the index of the attachment for which the
    sample locations state is provided.
  * pname:sampleLocationsInfo is the sample locations state to use for the
    layout transition of the given attachment from the initial layout of the
    attachment to the image layout specified for the attachment in the first
    subpass using it.

If the image referenced by the framebuffer attachment at index
pname:attachmentIndex was not created with
ename:VK_IMAGE_CREATE_SAMPLE_LOCATIONS_COMPATIBLE_DEPTH_BIT_EXT then the
values specified in pname:sampleLocationsInfo are ignored.

.Valid Usage
****
  * [[VUID-VkAttachmentSampleLocationsEXT-attachmentIndex-01531]]
    pname:attachmentIndex must: be less than the pname:attachmentCount
    specified in slink:VkRenderPassCreateInfo the render pass specified by
    slink:VkRenderPassBeginInfo::pname:renderPass was created with
****

include::{generated}/validity/structs/VkAttachmentSampleLocationsEXT.txt[]
--

[open,refpage='VkSubpassSampleLocationsEXT',desc='Structure specifying the sample locations state to use for layout transitions of attachments performed after a given subpass',type='structs']
--
The sname:VkSubpassSampleLocationsEXT structure is defined as:

include::{generated}/api/structs/VkSubpassSampleLocationsEXT.txt[]

  * pname:subpassIndex is the index of the subpass for which the sample
    locations state is provided.
  * pname:sampleLocationsInfo is the sample locations state to use for the
    layout transition of the depth/stencil attachment away from the image
    layout the attachment is used with in the subpass specified in
    pname:subpassIndex.

If the image referenced by the depth/stencil attachment used in the subpass
identified by pname:subpassIndex was not created with
ename:VK_IMAGE_CREATE_SAMPLE_LOCATIONS_COMPATIBLE_DEPTH_BIT_EXT or if the
subpass does not use a depth/stencil attachment, and
slink:VkPhysicalDeviceSampleLocationsPropertiesEXT::pname:variableSampleLocations
is ename:VK_TRUE then the values specified in pname:sampleLocationsInfo are
ignored.

.Valid Usage
****
  * [[VUID-VkSubpassSampleLocationsEXT-subpassIndex-01532]]
    pname:subpassIndex must: be less than the pname:subpassCount specified
    in slink:VkRenderPassCreateInfo the render pass specified by
    slink:VkRenderPassBeginInfo::pname:renderPass was created with
****

include::{generated}/validity/structs/VkSubpassSampleLocationsEXT.txt[]
--
endif::VK_EXT_sample_locations[]

ifdef::VK_QCOM_render_pass_transform[]
[open,refpage='VkRenderPassTransformBeginInfoQCOM',desc='Structure describing transform parameters of a render pass instance',type='structs']
--
To begin a render pass instance with <<vertexpostproc-renderpass-transform,
render pass transform>> enabled, add the
slink:VkRenderPassTransformBeginInfoQCOM to the pname:pNext chain of
slink:VkRenderPassBeginInfo structure passed to the
flink:vkCmdBeginRenderPass command specifying the render pass transform.

The sname:VkRenderPassTransformBeginInfoQCOM structure is defined as:

include::{generated}/api/structs/VkRenderPassTransformBeginInfoQCOM.txt[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:transform is a elink:VkSurfaceTransformFlagBitsKHR value
    describing the transform to be applied to rasterization.

.Valid Usage
****
  * [[VUID-VkRenderPassTransformBeginInfoQCOM-transform-02871]]
    pname:transform must: be ename:VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR,
    ename:VK_SURFACE_TRANSFORM_ROTATE_90_BIT_KHR,
    ename:VK_SURFACE_TRANSFORM_ROTATE_180_BIT_KHR, or
    ename:VK_SURFACE_TRANSFORM_ROTATE_270_BIT_KHR
  * [[VUID-VkRenderPassTransformBeginInfoQCOM-flags-02872]]
    The pname:renderpass must: have been created with
    slink:VkRenderPassCreateInfo::pname:flags containing
    ename:VK_RENDER_PASS_CREATE_TRANSFORM_BIT_QCOM
****

include::{generated}/validity/structs/VkRenderPassTransformBeginInfoQCOM.txt[]
--
endif::VK_QCOM_render_pass_transform[]

ifdef::VK_VERSION_1_2,VK_KHR_create_renderpass2[]
[open,refpage='VkSubpassBeginInfo',desc='Structure specifying subpass begin information',type='structs',alias='VkSubpassBeginInfoKHR']
--
The sname:VkSubpassBeginInfo structure is defined as:

include::{generated}/api/structs/VkSubpassBeginInfo.txt[]

ifdef::VK_KHR_create_renderpass2[]
or the equivalent

include::{generated}/api/structs/VkSubpassBeginInfoKHR.txt[]
endif::VK_KHR_create_renderpass2[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:contents is a elink:VkSubpassContents value specifying how the
    commands in the next subpass will be provided.

include::{generated}/validity/structs/VkSubpassBeginInfo.txt[]
--
endif::VK_VERSION_1_2,VK_KHR_create_renderpass2[]

[open,refpage='VkSubpassContents',desc='Specify how commands in the first subpass of a render pass are provided',type='enums']
--
Possible values of flink:vkCmdBeginRenderPass::pname:contents, specifying
how the commands in the first subpass will be provided, are:

include::{generated}/api/enums/VkSubpassContents.txt[]

  * ename:VK_SUBPASS_CONTENTS_INLINE specifies that the contents of the
    subpass will be recorded inline in the primary command buffer, and
    secondary command buffers must: not be executed within the subpass.
  * ename:VK_SUBPASS_CONTENTS_SECONDARY_COMMAND_BUFFERS specifies that the
    contents are recorded in secondary command buffers that will be called
    from the primary command buffer, and flink:vkCmdExecuteCommands is the
    only valid command on the command buffer until flink:vkCmdNextSubpass or
    flink:vkCmdEndRenderPass.
--

ifdef::VK_VERSION_1_1,VK_KHR_device_group[]
[open,refpage='VkDeviceGroupRenderPassBeginInfo',desc='Set the initial device mask and render areas for a render pass instance',type='structs']
--
If the pname:pNext chain of slink:VkRenderPassBeginInfo
ifdef::VK_KHR_dynamic_rendering[or slink:VkRenderingInfoKHR]
includes a sname:VkDeviceGroupRenderPassBeginInfo structure, then that
structure includes a device mask and set of render areas for the render pass
instance.

The sname:VkDeviceGroupRenderPassBeginInfo structure is defined as:

include::{generated}/api/structs/VkDeviceGroupRenderPassBeginInfo.txt[]

ifdef::VK_KHR_device_group[]
or the equivalent

include::{generated}/api/structs/VkDeviceGroupRenderPassBeginInfoKHR.txt[]
endif::VK_KHR_device_group[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:deviceMask is the device mask for the render pass instance.
  * pname:deviceRenderAreaCount is the number of elements in the
    pname:pDeviceRenderAreas array.
  * pname:pDeviceRenderAreas is a pointer to an array of slink:VkRect2D
    structures defining the render area for each physical device.

The pname:deviceMask serves several purposes.
It is an upper bound on the set of physical devices that can: be used during
the render pass instance, and the initial device mask when the render pass
instance begins.
In addition, commands transitioning to the next subpass in a render pass
instance and commands ending the render pass instance, and, accordingly
render pass attachment load, store, and resolve operations and subpass
dependencies corresponding to the render pass instance, are executed on the
physical devices included in the device mask provided here.

If pname:deviceRenderAreaCount is not zero, then the elements of
pname:pDeviceRenderAreas override the value of
slink:VkRenderPassBeginInfo::pname:renderArea, and provide a render area
specific to each physical device.
These render areas serve the same purpose as
slink:VkRenderPassBeginInfo::pname:renderArea, including controlling the
region of attachments that are cleared by ename:VK_ATTACHMENT_LOAD_OP_CLEAR
and that are resolved into resolve attachments.

If this structure is not present, the render pass instance's device mask is
the value of slink:VkDeviceGroupCommandBufferBeginInfo::pname:deviceMask.
If this structure is not present or if pname:deviceRenderAreaCount is zero,
slink:VkRenderPassBeginInfo::pname:renderArea is used for all physical
devices.

.Valid Usage
****
  * [[VUID-VkDeviceGroupRenderPassBeginInfo-deviceMask-00905]]
    pname:deviceMask must: be a valid device mask value
  * [[VUID-VkDeviceGroupRenderPassBeginInfo-deviceMask-00906]]
    pname:deviceMask must: not be zero
  * [[VUID-VkDeviceGroupRenderPassBeginInfo-deviceMask-00907]]
    pname:deviceMask must: be a subset of the command buffer's initial
    device mask
  * [[VUID-VkDeviceGroupRenderPassBeginInfo-deviceRenderAreaCount-00908]]
    pname:deviceRenderAreaCount must: either be zero or equal to the number
    of physical devices in the logical device
  * [[VUID-VkDeviceGroupRenderPassBeginInfo-offset-06166]]
    The pname:offset.x member of any element of pname:pDeviceRenderAreas
    must: be greater than or equal to 0
  * [[VUID-VkDeviceGroupRenderPassBeginInfo-offset-06167]]
    The pname:offset.y member of any element of pname:pDeviceRenderAreas
    must: be greater than or equal to 0
  * [[VUID-VkDeviceGroupRenderPassBeginInfo-offset-06168]]
    The sum of the pname:offset.x and pname:extent.width members of any
    element of pname:pDeviceRenderAreas must: be less than or equal to
    <<limits-maxFramebufferWidth, pname:maxFramebufferWidth>>
  * [[VUID-VkDeviceGroupRenderPassBeginInfo-offset-06169]]
    The sum of the pname:offset.y and pname:extent.height members of any
    element of pname:pDeviceRenderAreas must: be less than or equal to
    <<limits-maxFramebufferHeight, pname:maxFramebufferHeight>>
****

include::{generated}/validity/structs/VkDeviceGroupRenderPassBeginInfo.txt[]
--
endif::VK_VERSION_1_1,VK_KHR_device_group[]

ifdef::VK_VERSION_1_2,VK_KHR_imageless_framebuffer[]
[open,refpage='VkRenderPassAttachmentBeginInfo',desc='Structure specifying images to be used as framebuffer attachments',type='structs',alias='VkRenderPassAttachmentBeginInfoKHR']
--
The sname:VkRenderPassAttachmentBeginInfo structure is defined as:

include::{generated}/api/structs/VkRenderPassAttachmentBeginInfo.txt[]

ifdef::VK_KHR_imageless_framebuffer[]
or the equivalent

include::{generated}/api/structs/VkRenderPassAttachmentBeginInfoKHR.txt[]
endif::VK_KHR_imageless_framebuffer[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:attachmentCount is the number of attachments.
  * pname:pAttachments is a pointer to an array of sname:VkImageView
    handles, each of which will be used as the corresponding attachment in
    the render pass instance.

.Valid Usage
****
  * [[VUID-VkRenderPassAttachmentBeginInfo-pAttachments-03218]]
    Each element of pname:pAttachments must: only specify a single mip level
  * [[VUID-VkRenderPassAttachmentBeginInfo-pAttachments-03219]]
    Each element of pname:pAttachments must: have been created with the
    identity swizzle
  * [[VUID-VkRenderPassAttachmentBeginInfo-pAttachments-04114]]
    Each element of pname:pAttachments must: have been created with
    slink:VkImageViewCreateInfo::pname:viewType not equal to
    ename:VK_IMAGE_VIEW_TYPE_3D
****

include::{generated}/validity/structs/VkRenderPassAttachmentBeginInfo.txt[]
--
endif::VK_VERSION_1_2,VK_KHR_imageless_framebuffer[]

[open,refpage='vkGetRenderAreaGranularity',desc='Returns the granularity for optimal render area',type='protos']
--
To query the render area granularity, call:

include::{generated}/api/protos/vkGetRenderAreaGranularity.txt[]

  * pname:device is the logical device that owns the render pass.
  * pname:renderPass is a handle to a render pass.
  * pname:pGranularity is a pointer to a slink:VkExtent2D structure in which
    the granularity is returned.

The conditions leading to an optimal pname:renderArea are:

  * the pname:offset.x member in pname:renderArea is a multiple of the
    pname:width member of the returned slink:VkExtent2D (the horizontal
    granularity).
  * the pname:offset.y member in pname:renderArea is a multiple of the
    pname:height member of the returned slink:VkExtent2D (the vertical
    granularity).
  * either the pname:extent.width member in pname:renderArea is a multiple
    of the horizontal granularity or pname:offset.x+pname:extent.width is
    equal to the pname:width of the pname:framebuffer in the
    slink:VkRenderPassBeginInfo.
  * either the pname:extent.height member in pname:renderArea is a multiple
    of the vertical granularity or pname:offset.y+pname:extent.height is
    equal to the pname:height of the pname:framebuffer in the
    slink:VkRenderPassBeginInfo.

Subpass dependencies are not affected by the render area, and apply to the
entire image subresources attached to the framebuffer as specified in the
description of <<renderpass-layout-transitions,automatic layout
transitions>>.
Similarly, pipeline barriers are valid even if their effect extends outside
the render area.

include::{generated}/validity/protos/vkGetRenderAreaGranularity.txt[]
--

[open,refpage='vkCmdNextSubpass',desc='Transition to the next subpass of a render pass',type='protos']
--
To transition to the next subpass in the render pass instance after
recording the commands for a subpass, call:

include::{generated}/api/protos/vkCmdNextSubpass.txt[]

  * pname:commandBuffer is the command buffer in which to record the
    command.
  * pname:contents specifies how the commands in the next subpass will be
    provided, in the same fashion as the corresponding parameter of
    flink:vkCmdBeginRenderPass.

The subpass index for a render pass begins at zero when
fname:vkCmdBeginRenderPass is recorded, and increments each time
fname:vkCmdNextSubpass is recorded.

Moving to the next subpass automatically performs any multisample resolve
operations in the subpass being ended.
End-of-subpass multisample resolves are treated as color attachment writes
for the purposes of synchronization.
ifdef::VK_VERSION_1_2,VK_KHR_depth_stencil_resolve[]
This applies to resolve operations for both color and depth/stencil
attachments.
endif::VK_VERSION_1_2,VK_KHR_depth_stencil_resolve[]
That is, they are considered to execute in the
ename:VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT pipeline stage and their
writes are synchronized with ename:VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT.
Synchronization between rendering within a subpass and any resolve
operations at the end of the subpass occurs automatically, without need for
explicit dependencies or pipeline barriers.
However, if the resolve attachment is also used in a different subpass, an
explicit dependency is needed.

After transitioning to the next subpass, the application can: record the
commands for that subpass.

.Valid Usage
****
  * [[VUID-vkCmdNextSubpass-None-00909]]
    The current subpass index must: be less than the number of subpasses in
    the render pass minus one
ifdef::VK_EXT_transform_feedback[]
  * [[VUID-vkCmdNextSubpass-None-02349]]
    This command must: not be recorded when transform feedback is active
endif::VK_EXT_transform_feedback[]
****

include::{generated}/validity/protos/vkCmdNextSubpass.txt[]
--

ifdef::VK_VERSION_1_2,VK_KHR_create_renderpass2[]
[open,refpage='vkCmdNextSubpass2',desc='Transition to the next subpass of a render pass',type='protos',alias='vkCmdNextSubpass2KHR']
--
To transition to the next subpass in the render pass instance after
recording the commands for a subpass, call:

ifdef::VK_VERSION_1_2[]
include::{generated}/api/protos/vkCmdNextSubpass2.txt[]
endif::VK_VERSION_1_2[]

ifdef::VK_VERSION_1_2+VK_KHR_create_renderpass2[or the equivalent command]

ifdef::VK_KHR_create_renderpass2[]
include::{generated}/api/protos/vkCmdNextSubpass2KHR.txt[]
endif::VK_KHR_create_renderpass2[]

  * pname:commandBuffer is the command buffer in which to record the
    command.
  * pname:pSubpassBeginInfo is a pointer to a slink:VkSubpassBeginInfo
    structure containing information about the subpass which is about to
    begin rendering.
  * pname:pSubpassEndInfo is a pointer to a slink:VkSubpassEndInfo structure
    containing information about how the previous subpass will be ended.

fname:vkCmdNextSubpass2 is semantically identical to flink:vkCmdNextSubpass,
except that it is extensible, and that pname:contents is provided as part of
an extensible structure instead of as a flat parameter.

.Valid Usage
****
  * [[VUID-vkCmdNextSubpass2-None-03102]]
    The current subpass index must: be less than the number of subpasses in
    the render pass minus one
ifdef::VK_EXT_transform_feedback[]
  * [[VUID-vkCmdNextSubpass2-None-02350]]
    This command must: not be recorded when transform feedback is active
endif::VK_EXT_transform_feedback[]
****

include::{generated}/validity/protos/vkCmdNextSubpass2.txt[]
--
endif::VK_VERSION_1_2,VK_KHR_create_renderpass2[]

[open,refpage='vkCmdEndRenderPass',desc='End the current render pass',type='protos']
--
To record a command to end a render pass instance after recording the
commands for the last subpass, call:

include::{generated}/api/protos/vkCmdEndRenderPass.txt[]

  * pname:commandBuffer is the command buffer in which to end the current
    render pass instance.

Ending a render pass instance performs any multisample resolve operations on
the final subpass.

.Valid Usage
****
  * [[VUID-vkCmdEndRenderPass-None-00910]]
    The current subpass index must: be equal to the number of subpasses in
    the render pass minus one
ifdef::VK_EXT_transform_feedback[]
  * [[VUID-vkCmdEndRenderPass-None-02351]]
    This command must: not be recorded when transform feedback is active
endif::VK_EXT_transform_feedback[]
ifdef::VK_KHR_dynamic_rendering[]
  * [[VUID-vkCmdEndRenderPass-None-06170]]
    The current render pass instance must: not have been begun with
    flink:vkCmdBeginRenderingKHR
endif::VK_KHR_dynamic_rendering[]
****

include::{generated}/validity/protos/vkCmdEndRenderPass.txt[]
--

ifdef::VK_VERSION_1_2,VK_KHR_create_renderpass2[]
[open,refpage='vkCmdEndRenderPass2',desc='End the current render pass',type='protos',alias='vkCmdEndRenderPass2KHR']
--
To record a command to end a render pass instance after recording the
commands for the last subpass, call:

ifdef::VK_VERSION_1_2[]
include::{generated}/api/protos/vkCmdEndRenderPass2.txt[]
endif::VK_VERSION_1_2[]

ifdef::VK_VERSION_1_2+VK_KHR_create_renderpass2[or the equivalent command]

ifdef::VK_KHR_create_renderpass2[]
include::{generated}/api/protos/vkCmdEndRenderPass2KHR.txt[]
endif::VK_KHR_create_renderpass2[]

  * pname:commandBuffer is the command buffer in which to end the current
    render pass instance.
  * pname:pSubpassEndInfo is a pointer to a slink:VkSubpassEndInfo structure
    containing information about how the previous subpass will be ended.

fname:vkCmdEndRenderPass2 is semantically identical to
flink:vkCmdEndRenderPass, except that it is extensible.

.Valid Usage
****
  * [[VUID-vkCmdEndRenderPass2-None-03103]]
    The current subpass index must: be equal to the number of subpasses in
    the render pass minus one
ifdef::VK_EXT_transform_feedback[]
  * [[VUID-vkCmdEndRenderPass2-None-02352]]
    This command must: not be recorded when transform feedback is active
endif::VK_EXT_transform_feedback[]
ifdef::VK_KHR_dynamic_rendering[]
  * [[VUID-vkCmdEndRenderPass2-None-06171]]
    The current render pass instance must: not have been begun with
    flink:vkCmdBeginRenderingKHR
endif::VK_KHR_dynamic_rendering[]
****

include::{generated}/validity/protos/vkCmdEndRenderPass2.txt[]
--

[open,refpage='VkSubpassEndInfo',desc='Structure specifying subpass end information',type='structs',alias='VkSubpassEndInfoKHR']
--
The sname:VkSubpassEndInfo structure is defined as:

include::{generated}/api/structs/VkSubpassEndInfo.txt[]

ifdef::VK_KHR_create_renderpass2[]
or the equivalent

include::{generated}/api/structs/VkSubpassEndInfoKHR.txt[]
endif::VK_KHR_create_renderpass2[]

  * pname:sType is the type of this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.

include::{generated}/validity/structs/VkSubpassEndInfo.txt[]
--
endif::VK_VERSION_1_2,VK_KHR_create_renderpass2[]