1// Copyright 2019-2023 The Khronos Group Inc. 2// 3// SPDX-License-Identifier: CC-BY-4.0 4 5include::{generated}/meta/{refprefix}VK_EXT_image_robustness.adoc[] 6 7=== Other Extension Metadata 8 9*Last Modified Date*:: 10 2020-04-27 11*Interactions and External Dependencies*:: 12 - Promoted to Vulkan 1.3 Core 13*IP Status*:: 14 No known IP claims. 15*Contributors*:: 16 - Graeme Leese, Broadcom 17 - Jan-Harald Fredriksen, ARM 18 - Jeff Bolz, NVIDIA 19 - Spencer Fricke, Samsung 20 - Courtney Goeltzenleuchter, Google 21 - Slawomir Cygan, Intel 22 23=== Description 24 25This extension adds stricter requirements for how out of bounds reads from 26images are handled. 27Rather than returning undefined values, most out of bounds reads return R, 28G, and B values of zero and alpha values of either zero or one. 29Components not present in the image format may be set to zero or to values 30based on the format as described in <<textures-conversion-to-rgba, 31Conversion to RGBA>>. 32 33include::{generated}/interfaces/VK_EXT_image_robustness.adoc[] 34 35=== Promotion to Vulkan 1.3 36 37Functionality in this extension is included in core Vulkan 1.3, with the EXT 38suffix omitted. 39The original type, enum and command names are still available as aliases of 40the core functionality. 41 42=== Issues 43 441. How does this extension differ from VK_EXT_robustness2? 45 46The guarantees provided by this extension are a subset of those provided by 47the robustImageAccess2 feature of VK_EXT_robustness2. 48Where this extension allows return values of (0, 0, 0, 0) or (0, 0, 0, 1), 49robustImageAccess2 requires that a particular value dependent on the image 50format be returned. 51This extension provides no guarantees about the values returned for an 52access to an invalid Lod. 53 54=== Examples 55 56None. 57 58=== Version History 59 60 * Revision 1, 2020-04-27 (Graeme Leese) 61 * Initial draft 62