Change log for January 30, 2026 Vulkan 1.4.342 spec update:

Github Issues

  * Update reference from srcBuffer to srcImage for CmdCopyImage (public PR
    2664).

Internal Issues

  * Take packed formats into account in common build acceleration structure
    VU 03711 (internal issue 4643).
  * Remove clause about the internally synchronized bit from XML
    `implicitexternsyncparams` description for vkDestroyDevice (internal
    issue 4645).
  * Add VkBufferCreateinfo VUs 11277 / 11279 for VK_EXT_descriptor_heap
    (internal issue 4646).
  * Simplify and clean up alignment rules introduced as VUs by
    VK_EXT_descriptor_heap by referring to the
    <<limits-minStorageBufferOffsetAlignment,
    minStorageBufferOffsetAlignment>> limit (internal issue 4649).
  * Fix size alignment in VkResourceDescriptorInfoEXT VU 11454 (internal
    issue 4655).
  * Add FuncPointer / FuncPointerParam classes to vulkan_object (internal MR
    7736).
  * Add bitpos field to vulkan_object Flag class (internal MR 7875).
  * Add specVersionValue field to vulkan_object Extension class (internal MR
    7877).
  * Update deprecation text in VK_EXT_descriptor_buffer appendix and add
    <<legacy-resource-objects>> and <<legacy-descriptor-sets>> sections to
    the <<legacy, Legacy and Superseded Functionality>> appendix (internal
    MR 7997).
  * Fix VkDeviceCreateInfo VU 02802 disallowing mixed internsync and
    externsync queues (internal MR 8001).
  * Use Oxford comma consistently (internal MR 8005).
  * Fix Roadmap extension and version requirements in VP_KHR_roadmap.json
    (internal MR 8007).
  * Fix standalone SPIR-V VUs 06673 and 06674 for push constant requirements
    for banks (internal MR 8011).
  * Resolve all "`UNRESOLVED`" and "`PROPOSED`" issues in published
    extension appendices (internal MRs 8013, 8014).
  * Add API convention selection based on target API name to base_generator
    (internal MR 8020).
  * Change vkCmdBuildPartitionedAccelerationStructuresNV VU 10549 to only
    imply when acceleration structures are different (internal MR 8030).

New Extensions

  * VK_QCOM_cooperative_matrix_conversion

Author: oddhack

ChangeLog.adoc

@@ -14,6 +14,57 @@ appears frequently in the change log.
 
 '''
 
+Change log for January 30, 2026 Vulkan 1.4.342 spec update:
+
+Github Issues
+
+  * Update reference from srcBuffer to srcImage for CmdCopyImage (public PR
+    2664).
+
+Internal Issues
+
+  * Take packed formats into account in common build acceleration structure
+    VU 03711 (internal issue 4643).
+  * Remove clause about the internally synchronized bit from XML
+    `implicitexternsyncparams` description for vkDestroyDevice (internal
+    issue 4645).
+  * Add VkBufferCreateinfo VUs 11277 / 11279 for VK_EXT_descriptor_heap
+    (internal issue 4646).
+  * Simplify and clean up alignment rules introduced as VUs by
+    VK_EXT_descriptor_heap by referring to the
+    <<limits-minStorageBufferOffsetAlignment,
+    minStorageBufferOffsetAlignment>> limit (internal issue 4649).
+  * Fix size alignment in VkResourceDescriptorInfoEXT VU 11454 (internal
+    issue 4655).
+  * Add FuncPointer / FuncPointerParam classes to vulkan_object (internal MR
+    7736).
+  * Add bitpos field to vulkan_object Flag class (internal MR 7875).
+  * Add specVersionValue field to vulkan_object Extension class (internal MR
+    7877).
+  * Update deprecation text in VK_EXT_descriptor_buffer appendix and add
+    <<legacy-resource-objects>> and <<legacy-descriptor-sets>> sections to
+    the <<legacy, Legacy and Superseded Functionality>> appendix (internal
+    MR 7997).
+  * Fix VkDeviceCreateInfo VU 02802 disallowing mixed internsync and
+    externsync queues (internal MR 8001).
+  * Use Oxford comma consistently (internal MR 8005).
+  * Fix Roadmap extension and version requirements in VP_KHR_roadmap.json
+    (internal MR 8007).
+  * Fix standalone SPIR-V VUs 06673 and 06674 for push constant requirements
+    for banks (internal MR 8011).
+  * Resolve all "`UNRESOLVED`" and "`PROPOSED`" issues in published
+    extension appendices (internal MRs 8013, 8014).
+  * Add API convention selection based on target API name to base_generator
+    (internal MR 8020).
+  * Change vkCmdBuildPartitionedAccelerationStructuresNV VU 10549 to only
+    imply when acceleration structures are different (internal MR 8030).
+
+New Extensions
+
+  * VK_QCOM_cooperative_matrix_conversion
+
+'''
+
 Change log for January 23, 2026 Vulkan 1.4.341 spec update:
 
 Internal Issues

Makefile

@@ -151,7 +151,7 @@ VERBOSE =
 # ADOCOPTS options for asciidoc->HTML5 output
 
 NOTEOPTS     = -a editing-notes -a implementation-guide
-PATCHVERSION = 341
+PATCHVERSION = 342
 BASEOPTS     =
 
 ifneq (,$(findstring VKSC_VERSION_1_0,$(VERSIONS)))

appendices/VK_EXT_debug_report.adoc

@@ -160,8 +160,8 @@ could be useful debugging the Vulkan implementation itself.
 application's handles?
 
 *RESOLVED*: Due to the different nature of dispatchable and nondispatchable
-handles there is no generic way (that we know of) that works for common
-compilers with 32bit, 64bit, C and C++.
+handles there is no generic way (that we know of) that works for common C
+and C++ compilers in both 32-bit and 64-bit ABIs.
 We recommend applications use the same cast that the validation layers use:
 +
 [source,c++]

appendices/VK_EXT_descriptor_buffer.adoc

@@ -33,6 +33,16 @@ include::{generated}/meta/{refprefix}VK_EXT_descriptor_buffer.adoc[]
 This extension introduces new commands to put shader-accessible descriptors
 directly in memory, making the management of descriptor data more explicit.
 
+
+ifdef::VK_EXT_descriptor_heap[]
+=== Deprecation by `VK_EXT_descriptor_heap`
+
+Functionality in this extension is deprecated by the
+apiext:VK_EXT_descriptor_heap extension.
+See <<legacy-descriptor-sets, Descriptor Management: Replaced by Descriptor
+Heaps>>.
+endif::VK_EXT_descriptor_heap[]
+
 include::{generated}/interfaces/VK_EXT_descriptor_buffer.adoc[]
 
 === Version History

appendices/VK_EXT_discard_rectangles.adoc

@@ -19,7 +19,7 @@ include::{generated}/meta/{refprefix}VK_EXT_discard_rectangles.adoc[]
 
 This extension provides additional orthogonally aligned "`discard
 rectangles`" specified in framebuffer-space coordinates that restrict
-rasterization of all points, lines and triangles.
+rasterization of all points, lines, and triangles.
 
 From zero to an implementation-dependent limit (specified by
 pname:maxDiscardRectangles) number of discard rectangles can be operational

appendices/VK_EXT_headless_surface.adoc

@@ -32,7 +32,7 @@ development because it allows any platform to expose an arbitrary or
 customizable set of restrictions and features of a presentation engine.
 This makes it a useful portable test target for applications targeting a
 wide range of presentation engines where the actual target presentation
-engines might be scarce, unavailable or otherwise undesirable or
+engines might be scarce, unavailable, or otherwise undesirable or
 inconvenient to use for general Vulkan application development.
 
 include::{generated}/interfaces/VK_EXT_headless_surface.adoc[]

appendices/VK_EXT_host_image_copy.adoc

@@ -45,7 +45,7 @@ include::{generated}/interfaces/VK_EXT_host_image_copy.adoc[]
 Functionality in this extension is included in core Vulkan 1.4, with the EXT
 suffix omitted.
 However, the feature is made optional in Vulkan 1.4.
-The original type, enum and command names are still available as aliases of
+The original type, enum, and command names are still available as aliases of
 the core functionality.
 
 A Vulkan 1.4 implementation that has a ename:VK_QUEUE_GRAPHICS_BIT queue

appendices/VK_EXT_pipeline_protected_access.adoc

@@ -28,7 +28,7 @@ include::{generated}/interfaces/VK_EXT_pipeline_protected_access.adoc[]
 
 Functionality in this extension is included in core Vulkan 1.4 with the EXT
 suffix omitted.
-The original type, enum and command names are still available as aliases of
+The original type, enum, and command names are still available as aliases of
 the core functionality.
 
 === Version History

appendices/VK_EXT_pipeline_robustness.adoc

@@ -38,7 +38,7 @@ include::{generated}/interfaces/VK_EXT_pipeline_robustness.adoc[]
 
 Functionality in this extension is included in core Vulkan 1.4 with the EXT
 suffix omitted.
-The original type, enum and command names are still available as aliases of
+The original type, enum, and command names are still available as aliases of
 the core functionality.
 
 === Version History

appendices/VK_EXT_shader_tile_image.adoc

@@ -7,9 +7,9 @@ include::{generated}/meta/{refprefix}VK_EXT_shader_tile_image.adoc[]
 === Other Extension Metadata
 
 *Last Modified Date*::
-  2023-03-23
+    2023-03-23
 *IP Status*::
-  No known IP claims.
+    No known IP claims.
 *Interactions and External Dependencies*::
   - This extension provides API support for
     https://raw.githubusercontent.com/KhronosGroup/GLSL/main/extensions/ext/GLSL_EXT_shader_tile_image.txt[`GL_EXT_shader_tile_image`]
@@ -28,7 +28,7 @@ include::{generated}/meta/{refprefix}VK_EXT_shader_tile_image.adoc[]
 
 === Description
 
-This extension allows fragment shader invocations to read color, depth and
+This extension allows fragment shader invocations to read color, depth, and
 stencil values at their pixel location in rasterization order.
 The functionality is only available when using dynamic render passes
 introduced by VK_KHR_dynamic_rendering.