| // Copyright 2019-2021 The Khronos Group Inc. |
| // |
| // SPDX-License-Identifier: CC-BY-4.0 |
| |
| include::{generated}/meta/{refprefix}VK_EXT_image_robustness.txt[] |
| |
| === Other Extension Metadata |
| |
| *Last Modified Date*:: |
| 2020-04-27 |
| *IP Status*:: |
| No known IP claims. |
| *Contributors*:: |
| - Graeme Leese, Broadcom |
| - Jan-Harald Fredriksen, ARM |
| - Jeff Bolz, NVIDIA |
| - Spencer Fricke, Samsung |
| - Courtney Goeltzenleuchter, Google |
| - Slawomir Cygan, Intel |
| |
| === Description |
| |
| This extension adds stricter requirements for how out of bounds reads from |
| images are handled. |
| Rather than returning undefined values, most out of bounds reads return R, |
| G, and B values of zero and alpha values of either zero or one. |
| Components not present in the image format may be set to zero or to values |
| based on the format as described in <<textures-conversion-to-rgba, |
| Conversion to RGBA>>. |
| |
| include::{generated}/interfaces/VK_EXT_image_robustness.txt[] |
| |
| === Issues |
| |
| 1. How does this extension differ from VK_EXT_robustness2? |
| |
| The guarantees provided by this extension are a subset of those provided by |
| the robustImageAccess2 feature of VK_EXT_robustness2. |
| Where this extension allows return values of (0, 0, 0, 0) or (0, 0, 0, 1), |
| robustImageAccess2 requires that a particular value dependent on the image |
| format be returned. |
| This extension provides no guarantees about the values returned for an |
| access to an invalid Lod. |
| |
| === Examples |
| |
| None. |
| |
| === Version History |
| |
| * Revision 1, 2020-04-27 (Graeme Leese) |
| - Initial draft |
