| // Copyright 2020-2021 The Khronos Group Inc. |
| // |
| // SPDX-License-Identifier: CC-BY-4.0 |
| |
| include::{generated}/meta/{refprefix}VK_EXT_shader_image_atomic_int64.txt[] |
| |
| === Other Extension Metadata |
| |
| *Last Modified Date*:: |
| 2020-07-14 |
| *IP Status*:: |
| No known IP claims. |
| *Contributors*:: |
| - Matthaeus Chajdas, AMD |
| - Graham Wihlidal, Epic Games |
| - Tobias Hector, AMD |
| - Jeff Bolz, Nvidia |
| - Jason Ekstrand, Intel |
| *Interactions and External Dependencies*:: |
| - This extension requires the |
| {spirv}/EXT/SPV_EXT_shader_image_int64.html[`SPV_EXT_shader_image_int64`] |
| SPIR-V extension. |
| - This extension requires the |
| https://github.com/KhronosGroup/GLSL/blob/master/extensions/ext/GLSL_EXT_shader_image_int64.txt[`GLSL_EXT_shader_image_int64`] |
| extension for GLSL source languages. |
| |
| === Description |
| |
| This extension extends existing 64-bit integer atomic support to enable |
| these operations on images as well. |
| |
| When working with large 2- or 3-dimensional data sets (e.g. rasterization or |
| screen-space effects), image accesses are generally more efficient than |
| equivalent buffer accesses. |
| This extension allows applications relying on 64-bit integer atomics in this |
| manner to quickly improve performance with only relatively minor code |
| changes. |
| |
| 64-bit integer atomic support is guaranteed for optimally tiled images with |
| the ename:VK_FORMAT_R64_UINT and ename:VK_FORMAT_R64_SINT formats. |
| |
| include::{generated}/interfaces/VK_EXT_shader_image_atomic_int64.txt[] |
| |
| === Version History |
| |
| * Revision 1, 2020-07-14 (Tobias Hector) |
| - Initial draft |
