1// Copyright 2019-2024 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*IP Status*:: 12 No known IP claims. 13*Contributors*:: 14 - Graeme Leese, Broadcom 15 - Jan-Harald Fredriksen, ARM 16 - Jeff Bolz, NVIDIA 17 - Spencer Fricke, Samsung 18 - Courtney Goeltzenleuchter, Google 19 - Slawomir Cygan, Intel 20 21=== Description 22 23This extension adds stricter requirements for how out of bounds reads from 24images are handled. 25Rather than returning undefined values, most out of bounds reads return R, 26G, and B values of zero and alpha values of either zero or one. 27Components not present in the image format may be set to zero or to values 28based on the format as described in <<textures-conversion-to-rgba, 29Conversion to RGBA>>. 30 31include::{generated}/interfaces/VK_EXT_image_robustness.adoc[] 32 33=== Promotion to Vulkan 1.3 34 35Functionality in this extension is included in core Vulkan 1.3, with the EXT 36suffix omitted. 37The original type, enum and command names are still available as aliases of 38the core functionality. 39 40=== Issues 41 421. How does this extension differ from VK_EXT_robustness2? 43 44The guarantees provided by this extension are a subset of those provided by 45the robustImageAccess2 feature of VK_EXT_robustness2. 46Where this extension allows return values of (0, 0, 0, 0) or (0, 0, 0, 1), 47robustImageAccess2 requires that a particular value dependent on the image 48format be returned. 49This extension provides no guarantees about the values returned for an 50access to an invalid Lod. 51 52=== Examples 53 54None. 55 56=== Version History 57 58 * Revision 1, 2020-04-27 (Graeme Leese) 59 * Initial draft 60