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Change log for April 10, 2026 Vulkan 1.4.349 spec update:
Github Issues * Fix incorrect types in vulkanobject scripts (public vulkan-object issue 24). Internal Issues * Add an issue to the VK_KHR_display_swapchain appendix clarifying that VkDisplayPresentInfoKHR can be used with a non-shared swapchain (issue 4749). * Move VU 11845 from common VUs to be specific to vkCmdBuildAccelerationStructuresKHR (internal issue 4765). * Add missing <spirvextension> tags for VK_KHR_shader_abort and VK_KHR_shader_constant_data (internal issue 4770). * Add missing `len` attribute to VkDeviceFaultShaderAbortMessageInfoKHR pMessageData XML (internal issue 4771). * Add VkRenderingInfo VUs to ban being able to mix arrayLayer between the multiview color and resolve image view (MR 8173). * Update vkCreateShadersEXT VU 08404 to disallow mixed linking of non-mesh/task stages with mesh/task for shader objects (MR 8180). * Move issues from VK_EXT_rasterization_order_attachment_access appendix to proposal document (MR 8181). * Tag VK_NV_per_stage_descriptor_set in XML as superseded by VK_EXT_descriptor_heap (MR 8185). * Fix typo imageResolveMode -> resolveMode in some vkCmdBeginRendering VUs (MR 8186). * Remove duplicate common draw VU 07474 (MR 8187). * Refactor primitive restart index VU 12401 from VkDrawIndexedIndirectCommand to the corresponding vkCmdDrawIndexedIndirect* commands which use it (MR 8188). * Change `<!--` comments in XML to `<comment>` tags (internal MR 8190). * Remove VkDeviceCreateInfo VU 13048 (MR 8193). * Add logical NOT (`!`) operator to supported XML `protect` expressions (MR 8194). * Fix off by one errors for VkRenderingInfo VUs 06108 and 06124 (MR 8198). New Extensions * VK_ARM_data_graph_optical_flow
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‎.gitlab/merge_request_templates/extensiontemplate.md‎

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[Rendered Proposal](https://gitlab.khronos.org/vulkan/vulkan/-/blob/%{source_branch}/proposals/%{source_branch}.adoc)
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Link above is based on the source branch name.
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If the branch and extension name do not match, update the first to the branch name, and the proposal document to the actual name of the extension.
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Write a description of the extension here, and tag any issues that are addressed/fixed by this extension's introduction.

‎.reuse/dep5‎

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Files: scripts/asciidoctor-chunker/*
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Copyright: 2021 Wataru Shito (@waterloo_jp)
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License: MIT
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Files: .gitlab/merge_request_templates/extensiontemplate.md
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Copyright: 2026 The Khronos Group Inc
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License: CC-BY-4.0

‎ChangeLog.adoc‎

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'''
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Change log for April 10, 2026 Vulkan 1.4.349 spec update:
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Github Issues
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* Fix incorrect types in vulkanobject scripts (public vulkan-object issue
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24).
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Internal Issues
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* Add an issue to the VK_KHR_display_swapchain appendix clarifying that
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VkDisplayPresentInfoKHR can be used with a non-shared swapchain (issue
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4749).
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* Move VU 11845 from common VUs to be specific to
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vkCmdBuildAccelerationStructuresKHR (internal issue 4765).
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* Add missing <spirvextension> tags for VK_KHR_shader_abort and
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VK_KHR_shader_constant_data (internal issue 4770).
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* Add missing `len` attribute to VkDeviceFaultShaderAbortMessageInfoKHR
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pMessageData XML (internal issue 4771).
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* Add VkRenderingInfo VUs to ban being able to mix arrayLayer between the
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multiview color and resolve image view (MR 8173).
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* Update vkCreateShadersEXT VU 08404 to disallow mixed linking of
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non-mesh/task stages with mesh/task for shader objects (MR 8180).
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* Move issues from VK_EXT_rasterization_order_attachment_access appendix
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to proposal document (MR 8181).
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* Tag VK_NV_per_stage_descriptor_set in XML as superseded by
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VK_EXT_descriptor_heap (MR 8185).
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* Fix typo imageResolveMode -> resolveMode in some vkCmdBeginRendering VUs
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(MR 8186).
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* Remove duplicate common draw VU 07474 (MR 8187).
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* Refactor primitive restart index VU 12401 from
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VkDrawIndexedIndirectCommand to the corresponding
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vkCmdDrawIndexedIndirect* commands which use it (MR 8188).
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* Change `<!--` comments in XML to `<comment>` tags (internal MR 8190).
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* Remove VkDeviceCreateInfo VU 13048 (MR 8193).
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* Add logical NOT (`!`) operator to supported XML `protect` expressions
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(MR 8194).
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* Fix off by one errors for VkRenderingInfo VUs 06108 and 06124 (MR 8198).
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New Extensions
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* VK_ARM_data_graph_optical_flow
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'''
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Change log for April 3, 2026 Vulkan 1.4.348 spec update:
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Github Issues

‎Makefile‎

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# ADOCOPTS options for asciidoc->HTML5 output
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NOTEOPTS = -a editing-notes -a implementation-guide
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PATCHVERSION = 348
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PATCHVERSION = 349
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BASEOPTS =
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ifneq (,$(findstring VKSC_VERSION_1_0,$(VERSIONS)))

‎appendices/VK_ARM_data_graph_optical_flow.adoc‎

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// Copyright 2023-2026 The Khronos Group Inc.
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//
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// SPDX-License-Identifier: CC-BY-4.0
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include::{generated}/meta/{refprefix}VK_ARM_data_graph_optical_flow.adoc[]
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=== Other Extension Metadata
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*Last Modified Date*::
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2026-04-08
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*Contributors*::
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- Contributors to VK_NV_optical_flow
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- Kevin Petit, Arm Ltd.
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- Jan-Harald Fredriksen, Arm Ltd.
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- Steve Suzuki, Arm Ltd.
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- Liam O'Neil, Arm Ltd.
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=== Description
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This extension allows applications to estimate the 2D displacement of pixels
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between two images.
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include::{generated}/interfaces/VK_ARM_data_graph_optical_flow.adoc[]
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=== Version History
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* Revision 1, 2026-04-08 (Kevin Petit)
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** Internal revisions

‎appendices/VK_EXT_rasterization_order_attachment_access.adoc‎

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include::{generated}/interfaces/VK_EXT_rasterization_order_attachment_access.adoc[]
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=== Issues
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1) What are the interactions with the `apiext:VK_KHR_dynamic_rendering` or
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`apiext:VK_KHR_dynamic_rendering_local_read` extensions?
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*RESOLVED*
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Render pass instances begun with flink:vkCmdBeginRenderingKHR do not have
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input attachments and thus a different mechanism was needed to provide
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similar functionality in this case.
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This was provided by `apiext:VK_KHR_dynamic_rendering_local_read`, which
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enables reads from attachments and resources written by previous fragment
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shaders within a dynamic render pass.
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Render pass instances begun with flink:vkCmdBeginRenderingKHR do not have
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subpasses, and there is no equivalent to the following flag bits for these
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instances:
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* VK_SUBPASS_DESCRIPTION_RASTERIZATION_ORDER_ATTACHMENT_COLOR_ACCESS_BIT_EXT
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* VK_SUBPASS_DESCRIPTION_RASTERIZATION_ORDER_ATTACHMENT_DEPTH_ACCESS_BIT_EXT
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* VK_SUBPASS_DESCRIPTION_RASTERIZATION_ORDER_ATTACHMENT_STENCIL_ACCESS_BIT_EXT
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Instead, the behavior is controlled only by the corresponding pipeline flag
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bits, i.e.:
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* VK_PIPELINE_COLOR_BLEND_STATE_CREATE_RASTERIZATION_ORDER_ATTACHMENT_ACCESS_BIT_EXT
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* VK_PIPELINE_DEPTH_STENCIL_STATE_CREATE_RASTERIZATION_ORDER_ATTACHMENT_DEPTH_ACCESS_BIT_EXT
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* VK_PIPELINE_DEPTH_STENCIL_STATE_CREATE_RASTERIZATION_ORDER_ATTACHMENT_STENCIL_ACCESS_BIT_EXT
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2) What is the interaction with the `apiext:VK_EXT_shader_object` extension?
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*RESOLVED*
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This functionality is not available for draw calls using shader objects
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because the `apiext:VK_EXT_shader_object` extension depends on
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`apiext:VK_KHR_dynamic_rendering`, and thus neither the subpass flags nor
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the pipeline flags defined in this extension can be specified.
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=== Examples
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None.

‎appendices/VK_KHR_display_swapchain.adoc‎

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use for that image.
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5) Can slink:VkDisplayPresentInfoKHR be used without calling
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flink:vkCreateSharedSwapchainsKHR?
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*RESOLVED*: Yes.
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The two bits of functionality were meant to be independent.
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If the extension was created today, there would likely be two feature bits
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for slink:VkDisplayPresentInfoKHR and flink:vkCreateSharedSwapchainsKHR.
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ifndef::VKSC_VERSION_1_0[]
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=== Examples
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‎appendices/VK_KHR_shader_constant_data.adoc‎

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=== Description
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This extension allows the use of the `SPV_KHR_constant_data` extension in
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This extension allows the use of the
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{spirv}/KHR/SPV_KHR_constant_data.html[`SPV_KHR_constant_data`] extension in
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SPIR-V shader modules which enables the specification and specialization of
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arrays of constant data.
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