Vulkan API specifications 1.0.4 released

[JeGX]

Change log for January 15, 2018 Vulkan 1.0.68 spec update:

  * Bump API patch number and header version number to 68 for this update.

Github Issues:

  * Added more details in the
    <<extended-functionality-extensions-compatibility, Extension
    Compatibility>> section, allowing explicit incompatibilities, and
    simplify corresponding language in the style guide, which now defers to
    the API Specification on this point (public issue 638).
  * Fix typo in description of slink:VkCommandBufferLevel::pname:level
    (public issue 651).
  * Only include extension-dependent valid usage statement for
    slink:VkImageSubresourceRange, and note that the extension names for
    header files described in the <<boilerplate-wsi-header, Window
    System-Specific Header Control>> section are only valid links, when the
    specification being viewed is built with the corresponding extensions
    enabled (public issue 652).

Internal Issues:

  * Add language to elink:VkResult specifying that when commands return an
    error, output parameter contents are undefined instead of unmodified
    (except for pname:sType and pname:pNext). Note that this is a behavior
    change. Add notes calling out slink:VkImageFormatProperties as an
    exception (internal issue 1118).
  * Add "`general-purpose`" to the style guide, and correct existing uses of
    "`general purpose`" as an adjective (internal issue 1121).
  * Add the ename:VK_DEBUG_REPORT_OBJECT_TYPE_VALIDATION_CACHE_EXT_EXT token
    for the `VK_EXT_validation_cache` extension, following the same naming
    pattern as other tokens in the extension, but keep the old
    ename:VK_DEBUG_REPORT_OBJECT_TYPE_VALIDATION_CACHE_EXT token around for
    backwards compatibility (internal issue 1126).

Other Issues:

  * Specify that flink:vkCmdSetDiscardRectangleEXT does not affect copies or
    clears, matching existing language for the scissor rectangle test.
  * Move the <<boilerplate-sType, pname:sType>> definition from the
    boilerplate appendix to the Fundamentals chapter, putting it together
    with the valid usage of pname:sType rather than having the definition
    split across two places.
  * Inline all of the etext:Vk*Flags definitions, moving each one from the
    boilerplate appendix to appear either after the corresponding
    etext:Vk*FlagBits value if one is defined, or after the first structure
    that includes them if not.

Link: https://github.com/KhronosGroup/Vulkan-Docs/commit/57692834480e19201bb9efe9a67f7a65876b7a32

[Stefan]

Change log for February 19, 2018 Vulkan 1.0.69 spec update:

  * Bump API patch number and header version number to 69 for this update.

Github Issues:

  * Clean up description of synchronization for flink:vkAcquireNextImageKHR
    (public issue 626).
  * Move valid usage statements requiring offset and extent to respect image
    transfer granularity requirements of the queue family they are submitted
    against from slink:VkImageCopy and slink:VkBufferImageCopy to the
    corresponding flink:vkCmdCopyImage, flink:vkCmdCopyBufferToImage, and
    flink:vkCmdCopyImageToBuffer commands, where are relevant information is
    known (public issue 654).
  * Clarify that flink:vkGetDeviceProcAddr only supports device-level
    commands (public issue 655).

Internal Issues:

  * Associate each elink:VkDescriptorType with a type of descriptor, and
    link to descriptions of those types (internal issue 860).
  * Rework valid usage extraction script to better utilize and respond to
    spec markup, and fix some spec markup accordingly (internal issues 846,
    909, 945).
  * Rephrase flink:vkCmdPushConstants valid usage to allow overlapping push
    constant ranges in different shader stages (internal issue 1103).
  * Fix problem with diff_html target in extension.rb (internal issue 1104).
  * Modify valid usage statements for slink:VkClearDepthStencilValue,
    slink:VkGraphicsPipelineCreateInfo, slink:VkViewport, and
    flink:vkCmdSetDepthBounds, and the description of vkCmdSetDepthBias, to
    clarify that clamping is applied if and only if the
    `VK_EXT_depth_range_unrestricted` is not enabled (internal issue 1124),
    in versions of the specification built with that extension included.
  * Resolve contradictions and use of undefined "`per-sample shading`" term
    in the <<primsrast-sampleshading, Sample Shading>> and
    <<shaders-fragment-execution, Fragment Shader Execution>> sections; for
    the <<features-features-sampleRateShading, sampleRateShading feature>>;
    for code:FragCoord, code:SampleId, and code:SamplePosition; and for
    slink:sname:VkPipelineMultisampleStateCreateInfo (internal issue 1134).
  * Clarify the meaning of the ptext:maxDescriptorSet* limits in footnote 8
    of the <<features-limits-required,Required Limits>> table (internal
    issue 1139).
  * Fix broken NOTE markup in slink:VkSamplerCreateInfo.txt (internal issue
    1140).
  * Remove extend comparison language from valid usage statement for
    slink:VkImageCreateInfo, turning it into a simple validation of
    pname:mipLevels against pname:maxMipLevels (internal issue 1151).
  * Update valid usage statements for slink:VkImageCopy when the
    `VK_KHR_maintenance1` extension is enabled to allow multi-slice 2D <->
    3D copies when the pnaem:extent.depth parameter specifies the number of
    layers being copied, and matches the
    slink:VkImageSubresourceLayers.layerCount of the 2D image (internal
    issue 1152).
  * Rephrase memory / control barrier rules in the
    <<spirvenv-module-validation, Validation Rules within a Module>> section
    to avoid "`not use none`", which could be misconstrued to allow no
    synchronization semantics, and only storage class semantics (internal
    issue 1154).

Other Issues:

  * Move GLSL extension specifications to the KhronosGroup/GLSL repository
    on Github.
  * Add missing description of ename:VK_FILTER_CUBIC_IMG enum to
    slink:VkFilter.
  * Update description of code:PrimitiveId in the
    <<interfaces-builtin-variables,Built-In Variables>> section to clarify
    its behavior.
  * Disallow disjoint images from being used with dedicated-memory images in
    slink:VkMemoryDedicatedAllocateInfoKHR.
  * Update README to suggest older versions of "mathematical" and
    "ruby-gems" packages for use on Cygwin.
  * Fix typos

New Extensions:

  * `VK_AMD_buffer_marker`

source: https://github.com/KhronosGroup/Vulkan-Docs/commit/ab08f0951ef1ad9b84db93f971e113c1d9d55609

[JeGX]

Change log for March 7, 2018 Vulkan 1.1.70 spec update:

  * Vulkan 1.1 initial release. Bump API patch number and header version
    number to 70 for this update. The patch number will be used for both
    Vulkan 1.1 and Vulkan 1.0 updates, and continues to increment
    continuously from the previous Vulkan 1.0.69 update.

    NOTE: We are not publishing an updated 1.0.70 specification, or 1.1
    reference pages, along with 1.1.70. There are still minor issues to work
    out with those build targets. However, we will soon generate all three
    types of documents as part of the regular spec update cycle.

    NOTE: The GitHub KhronosGroup/Vulkan-Docs repository now maintains the
    current specification in the `master` branch. The `1.0` branch is out of
    date and will not be maintained, since we will be generating both 1.1
    and 1.0 specifications from the `master` branch in the future.

Github Issues:

  * Clarify how mapped memory ranges are flushed in
    flink:vkFlushMappedMemoryRanges (public issue 127).
  * Specify that <<synchronization-pipeline-stages, Pipeline Stages>> are a
    list of tasks that each command performs, rather than necessarily being
    discrete pieces of hardware that one task flows through. Add a
    "`synchronization command`" pipeline type which all synchronization
    command execute (it's just TOP + BOTTOM), with an explanatory note
    (public issue 554).

Internal Issues:

  * Regenerate all images used in the spec in Inkscape with a consistent
    look-and-feel, and adjust image size attributes so they're all legible,
    and not too large with respect to the spec body text (internal issue
    701).
  * Document in the <<extensions,extensions>> appendix and in the style
    guide that `KHX` extensions are no longer supported or used in the
    Vulkan 1.1 timeframe (internal issue 714).
  * Remove the leftover equations_temp directory after PDF build completes
    (internal issue 925).
  * Update the <<credits, Credits (Informative)>> appendix to include
    contributors to Vulkan 1.1, and to list them according to the API
    version(s) they contributed to (internal issue 987).
  * Add a NOTE to the introduction explaining that interfaces defined by
    extensions which were promoted to Vulkan 1.1 are now expressed as
    aliases of the Vulkan 1.1 type (internal issue 991).
  * Instrument spec source conditionals so spec can be built with 1.1
    features, extensions promoted to 1.1, or both (internal issues 992,
    998).
  * Modify the XML schema and tools to support explicit aliasing of types,
    structures, and commands, and use this to express the promotion of 1.0
    extensions to 1.1 core features, by making the extension interfaces
    aliases of the core features they were promoted to. Mark up promoted
    interfaces to allow still generating 1.0 + extension specifications
    (internal issue 991).
  * Platform names, along with corresponding preprocessor symbols to enable
    extensions specific to those platforms, are now reserved in vk.xml using
    the <platform> tag. Update the registry schema and schema specification
    to match (internal issue 1011).
  * Updated the <<textures-texel-replacement, Texel Replacement>> section to
    clarify that reads from invalid texels for image resources result in
    undefined values (internal issue 1014).
  * Modify description of patch version so it continues to increment across
    minor version changes (internal issue 1033).
  * Clarify and unify language describing physical device-level core and
    extension functionality in the <<fundamentals-validusage-extensions,
    Valid Usage for Extensions>>, <<fundamentals-validusage-versions, Valid
    Usage for Newer Core Versions>>, <<initialization-functionpointers
    Command Function Pointers>>, <<initialization-phys-dev-extensions,
    Extending Physical Device From Device Extensions>>
    <<extended-functionality-instance-extensions-and-devices, Instance
    Extensions and Device Extensions>> sections and for
    flink:vkGetPhysicalDeviceImageFormatProperties2. This documents that
    instance-level functionality is tied to the loader, and independent of
    the ICD; physical device-level functionality is tied to the ICD, and
    associated with device extensions; physical devices are treated more
    uniformly between core and extensions; and instance and physical
    versions can be different (internal issue 1048).
  * Updated the <<commandbuffers-lifecycle, Command Buffer Lifecycle>>
    section to clarify the ability for pending command buffers to transition
    to the invalid state after submission, and add a command buffer
    lifecycle diagram (internal issue 1050).
  * Clarify that some flink:VkDescriptorUpdateTemplateCreateInfo parameters
    are ignored when push descriptors are not supported (internal issue
    1054).
  * Specify that flink:vkCreateImage will return an error if the image is
    too large, in a NOTE in the slink:VkImageFormatProperties description
    (internal issue 1078).
  * Remove near-duplicate NOTEs about when to query function pointers
    dynamically in the <<initialization, Initialization>> chapter and
    replace by extending the NOTE in the <<fundamentals-abi, Application
    Binary Interface>> section (internal issue 1085).
  * Restore missing references to "`Sparse Resource Features`" in the
    flink:VkBufferCreateFlagBits description (internal issue 1086).
  * Tidy up definitions of descriptor types in the `GL_KHR_vulkan_glsl`
    specification, the <<descriptorsets, Resource Descriptors>> section and
    its subsections, and the <<interfaces-resources-descset, Descriptor Set
    Interface>> for consistency, reduction of duplicate information, and
    removal of GLSL correspondance/examples (internal issue 1090).
  * Correctly describe code:PrimitiveId as an Input for tessellation control
    and evaluation shaders, not an Output (internal issue 1109).
  * Relax the requirements on chroma offsets for nearest filtering in
    <<textures-implict-reconstruction, Implicit Reconstruction>> (internal
    issue 1116).

Other Issues:

  * Clarify the intended relationship between specification language and
    certain terms defined in the Khronos Intellectual Property Rights
    policy. Specific changes include:
  ** Rewrote IP/Copyright preamble and introduction to better agree with
     normative language both as laid out in the introduction, and the
     Khronos IPR policy.
  ** Added notion of fully informative sections, which are now tagged with
     "`(Informative)`" in their titles.
  ** Removed non-normative uses of the phrase "`not required`"
  ** Clarified the distinction between terms "`optional`" and "`not
     required:`" as they relate to the IPR Policy, and updated specification
     text to use terms consistent with the intent.
  ** Reduced additions to RFC 2119, and ensured the specification agreed
     with the leaner language.
  ** Removed the terms "`hardware`", "`software`", "`CPU`", and "`GPU`" from
     normative text.
  ** Moved several paragraphs that should not have been normative to
     informative notes.
  ** Clarified a number of definitions in the Glossary.
  ** Updated the document writing guide to match new terminology changes.
  * Explicitly state in the <<fundamentals-objectmodel-lifetime-acquire,
    application memory lifetime>> language that that for objects other than
    descriptor sets, a slink:VkDescriptorSetLayout object used in the
    creation of another object (such as slink:VkPipelineLayout or
    slink:VkDescriptorUpdateTemplateKHR) is only in use during the creation
    of that object and can be safely destroyed afterwards.
  * Updated the <<textures-scale-factor, Scale Factor Operation>> section to
    use the ratio of anisotropy, rather than the integer sample rate, to
    perform the LOD calculation. The spec still allows use of the sample
    rate as the value used to calculate the LOD, but no longer requires it.
  * Update `vulkan_ext.c` to include all platform-related definitions from
    the Vulkan platform headers, following the split of the headers into
    platform-specific and non-platform-specific files.
  * Fix bogus anchor name in the <<commandbuffers, Command Buffers>> chapter
    which accidentally duplicated an anchor in the pipelines chapter. There
    were no reference to this anchor, fortunately.
  * Add valid usage statement for slink:VkWriteDescriptorSet and
    slink:VkCopyDescriptorSet requiring that the slink:VkDescriptorSetLayout
    used to allocate the source and destination sets must not have been
    destroyed at the time flink:vkUpdateDescriptorSets is called.
  * Document mapping of subgroup barrier functions to SPIR-V, and clarify a
    place where subgroupBarrier sounds like it's execution-only in the
    standalone `GL_KHR_shader_subgroup` specification.
  * Use an HTML stylesheet derived from the Asciidoctor `colony` theme, with
    the default Arial font family replaced by the sans-serif Noto font
    family.
  * Numerous minor updates to README.adoc, build scripts, Makefiles, and
    registry and style guide specifications to support Vulkan 1.1 outputs,
    use them as defaults, and remove mention of `KHX` extensions, which are
    no longer supported.

New Extensions:

  * `VK_EXT_vertex_attrib_divisor`

Source: https://github.com/KhronosGroup/Vulkan-Docs/commit/ce60b9c88745ecded74296dfbe69dae7c1fb2e62

[Stefan]

Change log for March 16, 2018 Vulkan 1.1.71 spec update:

  * First public update for Vulkan 1.1.

Github Issues:

  * Refer to standard sparse image block shape format tables explicitly in
    the <<sparsememory-standard-shapes, Standard Sparse Image Block Shapes>>
    section (public issue 93).
  * Add the missing definition of the code:LocalInvocationIndex decoration
    in the <<interfaces-builtin-variables, Built-In Variables>> section
    (public issue 532).
  * Clarify dynamic state definition in the introduction to the <<pipelines,
    Pipelines>> section and the new <<pipelines-dynamic-state, Dynamic
    State>> subsection (public issue 620).
  * Clarified deprecation statement in the `VK_AMD_negative_viewport_height`
    appendix (public issue 674).
  * Fix parameter descriptions for flink:vkCreateIndirectCommandsLayoutNVX
    (public issue 677).

Internal Issues:

  * Remove description of <<primsrast-points, rasterization point size>>
    being taken from the tessellation control shader, since there are no
    circumstances under which you can have TCS without TES (internal issue
    522).
  * Define <<copies-images-format-size-compatibility, _size-compatible_
    image formats>> for flink:vkCmdCopyImage, add it to the glossary, and
    use that definition for slink:VkImageViewCreateInfo (internal issue
    771).
  * Change brief descriptions of enumerant names, and of parameters which
    are enumerants, from "`enum *indicates*`" to "`enum *specifies*`" for
    consistency, and add a markup style guide rule (internal issue 862).
  * Clarify how execution dependencies interact with
    <<synchronization-submission-order, submission order>> at numerous
    places in the <<renderpass, Render Pass>> and <<synchronization,
    Synchronization>> chapters (internal issue 1062).
  * Clarify statement in the <<interfaces-resources-setandbinding,
    DescriptorSet and Binding Assignment>> section that only interface
    variables statically used by the entry point used in a pipeline must be
    present in the descriptor set layout (internal issue 1172).
  * Flip sparse image diagrams with partially full mip levels vertically, to
    match graph origins of other image diagrams (internal issue 1176).
  * Update new SVG diagrams to have consistent style and base font size,
    increase consistency of primitive topology diagrams, and add a section
    to the style guide on creating and editing images in a consistent style
    (internal issue 1177).
  * Resolve problems with valid usage statement extraction by fixing
    existing VUID tags for interfaces promoted to version 1.1 and fixing
    conditional directives around
    VUID-VkMemoryDedicatedAllocateInfo-image-01797 (internal issue 1184).
  * Strip `KHR` suffixes from a few interfaces promoted to Vulkan 1.1 that
    were missed previously (internal issue 1185).
  * Restrict code:OpImageQuerySizeLod and code:OpImageQueryLevels to only
    work on code:Image operands with their code:Sampled operand set to 1. In
    other words, these operations are not defined to work with storage
    images (internal issue 1193).
  * Recycle extension slot for extension #82 in `vk.xml`. This extension was
    never published (internal issue 1195).
  * Add an issue to the `VK_KHR_maintenance1` appendix noting that zero
    height viewports are allowed when this extension is enabled (internal
    issue 1202).
  * Fix slink:VkDescriptorSetLayoutBinding description so that shader stages
    always use descriptor bindings, not the other way around (internal issue
    1206).
  * Fix field name for
    slink:VkInputAttachmentAspectReference::pname:inputAttachmentIndex
    (internal issue 1210).

Other Issues:

  * Fix a few broken links in the <<versions-1.1, Version 1.1>> appendix.
  * Replace a few old refBegin/refEnd tags with open block markup around
    interfaces, and remove old KHX VUID tags that were breaking the valid
    usage statement extraction.
  * Fix error codes accidentally tagged as success codes in `vk.xml` for
    flink:vkGetSwapchainCounterEXT.
  * Added valid usage statements for ftext:vkBind*Memory2 input structures
    stext:VkBind*MemoryInfo, and fix a pname:image -> pname:buffer typo in a
    couple of places.
  * Fix swapped descriptions of elink:VkDescriptorType enums
    ename:VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE and
    ename:VK_DESCRIPTOR_TYPE_STORAGE_IMAGE (reported via tweet).

New Extensions:

  * `VK_ANDROID_external_memory_android_hardware_buffer`

source: https://github.com/KhronosGroup/Vulkan-Docs/commit/e958791a01a51b816b4eb2c9e3777877b8d93bd2

[Stefan]

Change log for March 5, 2018 Vulkan 1.1.72 spec update:

  * Update release number to 72.

Github Issues:

  * Restructure the repository to put the specification `Makefile` and
    associated spec source material at the top level, `vk.xml` and
    associated scripts material in `xml/`, and generated include and source
    files in `include/vulkan/` and `src/ext_loader/`, respectively (public
    issue 436).
  * Add missing bullet point markup to flink:vkCmdCopyImage valid usage
    statement, so it gets a VUID assigned (public issue 627).
  * Fix broken links in a couple of extension appendices (public pull
    request 665).
  * Add the \<platform> tag to the index in section 4.1 of the registry
    schema documentation, and add the protect= attribute of \<extension>
    tags to the comments in `registry.rnc` (public issues 673, 678).
  * Add missing valid usage statements for sparse image interactions to
    flink:VkImageCreateInfo (public pull request 675).
  * Fix improper usage and grammar of "`can: not`" (public pull request
    681).
  * Remove duplicate spec language and NOTE on present layout between the
    flink:vkAcquireNextImageKHR and flink:vkAcquireNextImage2KHR commands
    (public pull request 685).
  * Fix some typos and markup issues (public pull request 689; public issues
    642, 667, 687).
  * Fix typo etext:VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_FENCE_FD_BIT ->
    ename:VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_SYNC_FD_BIT in the
    <<external-semaphore-handle-types-compatibility, External semaphore
    handle types compatibility>> table (public pull request 691).

Internal Issues:

  * Remove the need for the "`noautovalidity`" attribute on extension
    structures in `vk.xml`. It is now implied by the "`structextends`"
    attribute instead (internal issue 942).
  * Replace uses of "`currently bound`" with "`bound`", since "`currently`"
    is redundant and distracting, and add a corresponding rule to the style
    guide (internal issue 993).
  * Fixed subtle issues with the last updates to flink:vkAcquireNextImageKHR
    language that had resulted in ambiguities (internal issue 1178).
  * Make it clear that only one query of a given type is allowed at a time
    by reordering valid usage statements for flink:vkCmdBeginQuery and
    flink:vkCmdEndQuery, and removing redundant ones (internal issue 1213).
  * Swapped OL1 and OL3 in `tessparamUL.svg` to match previous version, and
    fixed where "`(no edge)`" appears (internal issue 1215).

Other Issues:

  * Fixed a minor problem with the valid usage statement extraction script,
    and corresponding markup in the spec source.

New Extensions:

  * `VK_AMD_shader_core_properties`
  * `VK_EXT_descriptor_indexing`
  * `VK_NV_shader_subgroup_partitioned`

source: https://github.com/KhronosGroup/Vulkan-Docs/commit/26f0bdbf1e43d85724369cb788ce915b2ce7915e

[Stefan]

Change log for April 15, 2018 Vulkan 1.1.73 spec update:

  * Update release number to 73.

Github Issues:

  * Refine swapchain association with surface for slink:VkSwapchainKHR, with
    matching valid usage statements for slink:VkSwapchainCreateInfoKHR and
    discussion following the <<swapchain-wsi-image-create-info>> table
    (public issue 637).
  * Re-remove several valid usage statements from slink:VkImageCreateInfo
    that had previously been removed at the time that
    ename:VK_IMAGE_CREATE_EXTENDED_USAGE_BIT was introduced. These
    statements had incorrectly been restored due to an glitch while merging
    from the old `1.0` branch to the current `master` branch (public issue
    683).

Internal Issues:

  * Fix reference page generation and configure build to generate reference
    pages 1.1 with all extensions, rather than core only, as was the case
    for the 1.0 ref pages (internal issues 484, 1056, 1205).
  * Require that
    slink:VkMemoryDedicatedRequirements::pname:prefersDedicateAllocation is
    ename:VK_TRUE when
    slink:VkMemoryDedicatedRequirements::pname:requiresDedicateAllocation is
    ename:VK_TRUE (internal issue 1222).
  * Fix Ruby extension code so `diff_html` Makefile target works (internal
    issue 1230).
  * Update `genRelease` script to generate 1.1 + all extensions reference
    pages - but not the single-page HTML / PDF versions, which are even
    larger than the API spec (internal issue 1245).

Other Issues:

  * Add missing attributes to `vk.xml` for `VK_ANDROID_native_buffer`.
  * Specify that the slink:VkAttachmentDescription::pname:format member is
    the format of the image *view* that will be used for the attachment.
  * Use core sname:VkPhysicalDeviceFeatures2 in the `structextends` `vk.xml`
    attribute for sname:VkPhysicalDeviceDescriptorIndexingFeaturesEXT and
    sname:VkPhysicalDeviceDescriptorIndexingPropertiesEXT, rather than the
    KHR equivalent it was promoted from.
  * Fix the "`Fragment Input Attachment Interface`" glossary entry to match
    the specification body.
  * Clarify the interaction of sRGB images used as storage or texel buffers
    with <<textures-output-format-conversion, Texel Output Format
    Conversion>>.
  * Moved three valid usage statements from
    slink:VkRenderPassMultiviewCreateInfo up to
    slink:VkRenderPassCreateInfo, and added a new valid usage statement for
    slink:VkRenderPassInputAttachmentAspectCreateInfo.
  * Added valid usage statements for slink:VkBufferMemoryBarrier and
    slink:VkImageMemoryBarrier reflecting the global requirement that
    "`non-sparse resources must be bound to memory before being recorded to
    command`".

New Extensions:

Source: https://github.com/KhronosGroup/Vulkan-Docs/commit/5300d9f05e03f721812273d5f9f9676c3227f056

[Stefan]

Change log for April 21, 2018 Vulkan 1.1.74 spec update:

  * Update release number to 74.

Github Issues:

  * Clarify which buffer locations are accessed in
    flink:vkCmdCopyBufferToImage valid usage statements (public issue 676).
  * Refine description of <<extended-functionality-extensions-dependencies,
    extension dependencies>>, related NOTE in the
    <<extended-functionality-extensions, Extensions>> section, and
    "`Required Extensions`" glossary term (public pull request 693).
  * Add support for specifying required Vulkan core version in `vk.xml` and
    the extension metadoc generator (public issue 696).
  * Update .gitignore for directory reorganization (public pull request
    699).
  * Fix typo (public pull request 703).

Internal Issues:

  * Update valid usage of slink:VkClearRect::pname:layerCount (internal
    issue 1241).

Other Issues:

  * Fix typo in <<NV_geometry_shader_passthrough>> issues list.

source: https://github.com/KhronosGroup/Vulkan-Docs/commit/c51545d33f4fd791dc4109d0d338e79b572f6286

[Stefan]

Change log for May 16, 2018 Vulkan 1.1.75 spec update:

  * Update release number to 75.

Github Issues:

  * Use Github handles (e.g. @handle) for contact information in vk.xml,
    when available (partial fix for public issue 630).
  * Add size invariance guarantee to slink:VkMemoryRequirements for
    buffer/image memory requirements (public issue 661).
  * Correct scope (conditional constructs) in valid usage statement for
    slink:VkBindImageMemoryInfo (public pull request 684).
  * Clean up minor markup issues and typos in the
    `VK_ANDROID_external_memory_android_hardware_buffer` extension appendix
    (public pull request 698).
  * Modify registry processing script to avoid irrelevant warnings of benign
    enumerant redefinitions (public pull request 705).
  * Fix some duplicate words and some misspelled "`stagess`" (public pull
    request 712)

Internal Issues:

  * Enable continuous integration tests on the internal Khronos gitlab
    server by adding a .gitlab-ci.yml file. Note: this does not implement CI
    on the public Github repository (internal issue 408).
  * Add link from description of depth clamping in the <<fragops-depth,
    depth test>> section to the
    slink:VkPipelineRasterizationStateCreateInfo::pname:depthClampEnable
    parameter which enables it, making it easily searchable / findable
    (internal issue 1125).
  * Clarify that arrays of arrays of descriptors are not allowed in the
    <<interfaces-resources-descset, Descriptor Set Interface>> and
    <<interfaces-resources-setandbinding, DescriptorSet and Binding
    Assignment>> sections (internal issue 1192).
  * Comment out some redundant nested asciidoctor conditionals in the
    slink:VkImageViewCreateInfo valid usage block, and explain in all cases
    why the redundant conditional exist and are commented out (internal
    issue 1231).
  * Move a valid usage statement from slink:VkCommandPoolCreateInfo to the
    parent flink:vkCreateCommandPool, where the device queue is known
    (internal issue 1233).
  * Add new slink:VkBaseInStructure and slink:VkBaseOutStructure types which
    can be used by extensions and implementations for handling Vulkan
    sType/pNext style structures in a more generic way (internal issue
    1265).
  * Clarify that
    slink:VkAndroidHardwareBufferFormatPropertiesANDROID::pname:formatFeatures
    only applies to external-format images. Add references to this in valid
    usage statements that previously only referred to
    slink:VkFormatProperties (internal issue 1244).
  * Fix the description of elink:VkPipelineCreateFlagBits enumerant
    ename:VK_PIPELINE_CREATE_VIEW_INDEX_FROM_DEVICE_INDEX_BIT to match the
    name (internal issue 1279).
  * Add a NOTE to the <<interfaces-resources-setandbinding, DescriptorSet
    and Binding Assignment>> section making it clear that variables sharing
    a storage class may use identical descriptor set and bindings.
    Specifically state the sometimes misunderstood ability to have one or
    more differently typed image descriptors sharing a descriptor set and
    binding (internal SPIR-V issue 264).
  * Make DynamicIndexing features and capabilities also control the
    uniformity of the descriptor used in memory access instructions in the
    <<interfaces-resources-descset, Descriptor Set Interface>> section. This
    makes them also apply to variable_pointer usage, which can bypass the
    array indexing operation (internal SPIR-V issue 289).

Other Issues:

  * Correct flink:vkCmdBlitImage limitations on cubic blits to be 2D only,
    not 3D.
  * Update valid usage statements for slink:VkRenderPassCreateInfo and
    slink:VkInputAttachmentAspectReference.
  * Move YCbCr-related VU statements from slink:VkDescriptorImageInfo to
    slink:VkWriteDescriptorSet, where all needed information is known, and
    remove redundant statements.
  * Move SPIR-V restriction that images be of either sampled or storage
    types from the <<interfaces-resources-descset, Descriptor Set
    Interface>> section to the <<spirvenv-module-validation, Validation
    Rules within a Module>> section of the SPIR-V appendix.

Source: https://github.com/KhronosGroup/Vulkan-Docs/commit/e665b9e6910e54caf754ad1e83aaa500d1de44f3

[Stefan]

Change log for May 25, 2018 Vulkan 1.1.76 spec update:

  * Update release number to 76.

Internal Issues:

  * Add an exception clause to the license on `vk.xml`, enabling its use
    with GPL-based projects (internal issue 1017).
  * Remove the generated `vulkan_ext.[ch]` files, which are no longer
    supported. Add `src/ext_loader/README.md` explaining why, and update
    files in `xml/` to not generate them by default (internal issue 1268)

Other Issues:

  * Fix typos in valid usage statements for the
    ftext:vkDrawIndexedIndirectCount* commands, replacing
    sizeof(VkDrawIndirectComment) with sizeof(VkDrawIndexedIndirectCommand).
  * Modify the <<spirvenv-module-validation, Validation Rules within a
    Module>> section to require code:NonReadable or code:NonWriteable in
    SPIR-V code for images with an image format of code:Unknown if one of
    the requisite code:shaderImageReadWithoutFormat or
    code:shaderImageWriteWithoutFormat features is disabled.

New Extensions:

  * `VK_KHR_get_display_properties2`
  * `VK_KHR_draw_indirect_count`

source: https://github.com/KhronosGroup/Vulkan-Docs/commit/ee13fc355fae06ffcd36ee09a98f12132d95dfc0

[Stefan]

Change log for June 10, 2018 Vulkan 1.1.77 spec update:

  * Update release number to 77.

Public Issues:

  * Remove redundant asciidoctor ifdef in slink:VkDeviceCreateInfo valid
    usage statement (public pull request 718).

Internal Issues:

  * Require that the returned slink:VkMemoryRequirements::pname:alignment
    reflect the minimum alignment requirements for the buffer's usages, and
    make dynamic offset alignment valid usage more explicit for
    flink:vkBindBufferMemory and flink:vkCmdBindDescriptorSets (internal
    issue 1170).
  * Explicitly state that objects of type code:OpTypeImage,
    code:OpTypeSampler, and code:OpTypeSampledImage must not be stored to in
    the <<spirvenv-module-validation, Validation Rules within a Module>>
    section (internal issue 1262).
  * Clarify rules about validating descriptor set/binding against storage
    class and descriptor type in the <<spirvenv-module-validation,
    Validation Rules within a Module>> section, and add an anchor for and
    references to the <<interfaces-resources-storage-class-correspondence,
    Shader Resource and Storage Class Correspondence>> table (internal issue
    1266).
  * Use correct spelling of SPIR-V decoration code:NonWritable in several
    places (internal issue 1298).

Other Issues:

  * Update specification links to files in the old
    KhronosGroup/Vulkan-LoaderAndValidationLayers repository with
    corresponding links into the new repositories that replace it.
  * Move validity requirement for slink:VkSamplerCreateInfo into the valid
    usage block instead of the body text, and give it a VUID.
  * Use the full name of the "`style guide`" in a reference in the
    description of slink:vkGetPhysicalDeviceProperties, update the
    <<vulkan-styleguide, link to that document>>, and use the the full name
    in the registry index page.

source: https://github.com/KhronosGroup/Vulkan-Docs/commit/0d5f92c7fafa7b61a14fce683f9624ba8c7f9a43

[Stefan]

Change log for June 18, 2018 Vulkan 1.1.78 spec update:

  * Update release number to 78.

Public Issues:

  * Change markup so parameter descriptions include links to structures,
    instead of just their names (public issue 697).
  * Resume publishing updated Vulkan 1.0 + KHR extensions and Vulkan 1.0 +
    all extensions versions of the specification (public issue 722).
  * Reapply fixes from public pull request 698 for
    `VK_ANDROID_external_memory_android_hardware_buffer`, which accidentally
    were reverted at some point (public pull request 724).
  * Fix undefined format valid usage statements for slink:VkImageCreateInfo
    in the presence of the
    `VK_ANDROID_external_memory_android_hardware_buffer` extension (public
    pull request 725).
  * Miscellaneous markup consistency fixes (public pull request 728).

Internal Issues:

  * When building specifications containing vendor extensions, add terms to
    the Khronos spec copyright specifying that the result is not a ratified
    specification (internal issue 739).
  * Change the value of the
    pname:maxDescriptorSetUpdateAfterBindUniformBuffers minimum limit to 72
    (6 times pname:maxPerStageDescriptorUpdateAfterBindUniformBuffers) in
    the <<features-limits-required, Required Limits>> table (internal issue
    1300).

Other Issues:

  * Fix link to resource image view compatibility table in the valid usage
    statements for slink:VkImageFormatListCreateInfoKHR (internal pull
    request 2711).

source: https://github.com/KhronosGroup/Vulkan-Docs/commit/933a3a3c4ae760c1486e82b23a66a6885f276bf7

[JeGX]

Change log for August 13, 2018 Vulkan 1.1.83 spec update:

  * Update release number to 83.

Public Issues:

  * Use [%inline] directive for all SVGs to reduce file size (public pull
    request 734).
  * Convert XML `value` aliases into \<alias> tags (public pull request
    747).
  * Fix metadoc script showing non-selected extensions (public pull request
    748).
  * Reapply public pull request 742 to make
    ename:VK_PIPELINE_STAGE_CONDITIONAL_RENDERING_BIT_EXT part of the
    graphices pipeline (public pull request 749).
  * Fix numerous typos related to accidental duplication of words (public
    pull request 760).
  * Fix `vk.xml` contact typos (public pull request 761).

Internal Issues:

  * Add images to the <<Standard sample locations>> table (internal issue
    1115).
  * Add a definition of "`Inherited from`" precision in the
    <<spirvenv-precision-operation, Precision and Operation of SPIR-V
    Instructions>> section (internal issue 1314).
  * Clarify that both built-in and user-defined variables count against the
    location limits for shader interfaces in the
    <<interfaces-iointerfaces-locations, Location Assignment>> section
    (internal issue 1316).
  * Merge "`required`" capabilities into the <<spirvenv-capabilities-table,
    list of optional: SPIR-V capabilities>> (internal issue 1320).
  * Relax the layout matching rules of descriptors referring to only a
    single aspect of a depth/stencil image, by reference to the new
    <<resources-image-layouts-matching-rule, Image Layout Matching Rules>>
    section (internal issue 1346).
  * Revert extension metadoc generator warning about name mismatches to a
    diagnostic, due to annoying warnings in build output for conscious
    choices we've made (internal issue 1351).

Other Issues:

  * Reserve bits for pending vendor extensions.
  * Make Vulkan consistent with SPIR-V regarding code:DepthReplacing and
    code:FragDepth in the <<interfaces-builtin-variables, Built-In
    Variables>> section.
  * Add missing ChangeLog entries for the previous three spec updates.

Source: https://github.com/KhronosGroup/Vulkan-Docs/commit/dd9919749a56177c2eb9b6525c0979722a3c24ff

[JeGX]

Change log for September 8, 2018 Vulkan 1.1.84 spec update:

  * Update release number to 84.

Public Issues:

  * Fix code sample in the `<<VK_EXT_debug_utils>>` extension (public issue
    751).
  * Fix misleading comment in `vk.xml` for
    slink:VkDescriptorBufferInfo::pname:buffer (public pull request 762).
  * Fix formatting of deprecation attributes in schema doc (public pull
    request 767).
  * Change `can` to `may` in the description of
    elink:VkSparseImageFormatFlagBits, which are return values from queries
    (public pull request 768).
  * Prettify generated contact list in extension appendices, adding logos
    and a New Issue link (public pull request 770).
  * Enable sRGB conversion based on the image view format, not the image
    format, in the <<textures-format-conversion, Format Conversion>> section
    (public pull request 773).
  * Fix typo in equation in the <<primsrast-lines-basic, Basic Line Segment
    Rasterization>> section (public pull request 780).
  * Fix special characters in GitHub contacts links (public pull request
    783).
  * Make clean_pdf target remove pdf folder (public pull request 784).
  * Fix styleguide bad markup of block continuation (public pull request
    792).

Other Issues:

  * Allow a zero vertex attribute divisor in the
    `<<VK_EXT_vertex_attribute_divisor>>` extension, exposed via the
    slink:VkPhysicalDeviceVertexAttributeDivisorFeaturesEXT feature.
  * Add missing `structextends="VkDeviceCreateInfo"` to
    slink:VkPhysicalDeviceShaderDrawParameterFeatures and
    slink:VkPhysicalDeviceBlendOperationAdvancedFeaturesEXT.

New Extensions:

  * `VK_KHR_memory_model`
  * `VK_EXT_astc_decode_mode`
  * `VK_EXT_inline_uniform_block`

source: https://github.com/KhronosGroup/Vulkan-Docs/commit/adadfce8a3610c026e56d2e026c0c6387e2bbdad

Extensions:
- VK_KHR_vulkan_memory_model
- VK_EXT_astc_decode_mode
- VK_EXT_inline_uniform_block

[JeGX]

Change log for September 19, 2018 Vulkan 1.1.85 spec update:

  * Update release number to 85.

Public Issues:

  * Add self-dependency ename:VK_DEPENDENCY_BY_REGION_BIT valid usage
    statements for slink:VkSubpassDependency(public pull request 778).
  * Apply fix from pull request 742 to slink:VkSubpassDependency and
    slink:VkSubpassDependency2 (public pull request 779).
  * Specify the units of slink:VkBufferImageCopy::pname:bufferRowLength and
    pname:bufferImageHeight as texels (public pull request 781).
  * Better specify promoted parameter mapping in the
    `<<VK_KHR_create_renderpass2>>` appendix (public pull request 782).

Internal Issues:

  * Only include the <<fundamentals-validusage-versions, Valid Usage for
    Newer Core Versions>> section in Vulkan 1.1 or later (internal issue
    1381).

Other Issues:

  * Clean up redundant valid usage language for the
    `VK_ANDROID_external_memory_android_hardware_buffer` extension
    interaction with slink:VkImageCreateInfo.
  * Fix error in a flag name within valid usage statements for
    slink:VkMemoryAllocateInfo.
  * Clarify that memory types are not totally ordered in
    slink:VkPhysicalDeviceMemoryProperties.
  * For slink:VkWriteDescriptorSetInlineUniformBlockEXT, set
    structextends="VkWriteDescriptorSet" in `vk.xml`, and make
    slink:VkDescriptorSetLayoutBindingFlagsCreateInfoEXT::pname:pBindingFlags
    optional.
  * Add documentation of 'provisional' XML attribute to registry.txt.

New Extensions:

  * `VK_NV_compute_shader_derivatives`
  * `VK_NV_corner_sampled_image`
  * `VK_NV_fragment_shader_barycentric`
  * `VK_NV_mesh_shader`
  * `VK_NV_representative_fragment_test`
  * `VK_NV_scissor_exclusive`
  * `VK_NV_shader_image_footprint`
  * `VK_NV_shading_rate_image`
  * `VK_NVX_raytracing`

source: https://github.com/KhronosGroup/Vulkan-Docs/commit/9858c1e89e21246f779226d2be779fd33bb6a50d

[JeGX]

Change log for October 7, 2018 Vulkan 1.1.87 spec update:

  * Update release number to 87.

Public Issues:

  * Merge flink:vkCmdPipelineBarrier self-dependency barrier VUs referring
    to the same subpass dependency (public pull request 756).
  * Describe default value of `"optional"` attribute in the registry schema
    document (public issue 769)
  * Fix links in <<VK_NVX_raytracing>> extension (public pull request 805).
  * Mark the <<VK_KHR_mir_surface>> extension obsolete (see public issue 814
    - does not close this, however).
  * Fix missing endif in Image Creation block (public issue 817).

Internal Issues:

  * Clarify that the compressed texture formats corresponding to
    <<features-features-textureCompressionETC2>>,
    <<features-features-textureCompressionASTC_LDR>>, and
    <<features-features-textureCompressionBC>> is not contingent on the
    feature bits, and may be supported even if the features are not enabled
    (internal issue 663).
  * Clarify that code:FragStencilRefEXT is output only in the
    <<interfaces-builtin-variables, Built-In Variables>> section (internal
    issue 1173).
  * Identify and correct many overly-aggressive uses of "`undefined`", and
    narrow them down, where straightforward to do so. Mark such resolved
    uses of "`undefined`" with the custom undefined: macro. Add a new
    <<writing-undefined, Describing Undefined Behavior>> section (internal
    issue 1267).
  * Don't require code:inline_uniform_block descriptors to be populated
    before use in the flink:vkAllocateDescriptorSets section (internal issue
    1380).
  * Allow suppressing inline SVG images by controlling this with an
    attribute set in the Makefile, rather than the explicit [%inline]
    directive (internal issue 1391).
  * Mark 'Khronos' as a registered trademark in several places, now that it
    is one.
  * Fix typo in the <<VK_KHR_shader_atomic_int64>> appendix using the GLSL
    naming of the compare exchange op when referring to the SPIR-V op.
  * Specify in the flink:vkGetPhysicalDeviceQueueFamilyProperties section
    that all implementations must support at least one queue family, and
    that every queue family must contain at least one queue.
  * Make slink:VkPipelineDynamicStateCreateInfo::pname:dynamicStateCount,
    slink:VkSampleLocationsInfoEXT::pname:sampleLocationsPerPixel, and
    slink:VkSampleLocationsInfoEXT::pname:sampleLocationsCount optional, to
    fix bogus implicit valid usage checks that were causing failures in the
    conformance tests.
  * Fix vendor tag in reserved extension 237 constants. Does not affect
    anything since it's just a placeholder, but this should avoid further
    comments.
  * Minor markup fixes in some extension appendices.

New Extensions:

  * `<<VK_FUCHSIA_imagepipe_surface>>`

source: https://github.com/KhronosGroup/Vulkan-Docs/commit/911a7646949e661b24ad6111479029ed9e841284

[JeGX]

Change log for October 13, 2018 Vulkan 1.1.88 spec update:

  * Update release number to 88.

Public Issues:

  * Make clear that
    tname:PFN_vkDebugUtilsMessengerCallbackEXT::pname:messageTypes is a
    bitmask, and correct a typo in the spelling of
    slink:VkDebugUtilsMessengerCreateInfoEXT.txt::pname:messageType (public
    pull request 800).
  * Make an ABI-compatible change of the type of
    slink:VkPhysicalDeviceDriverPropertiesKHR::pname:driverID to use the new
    elink:VkDriverIdKHR type (public issue 811).

Internal Issues:

  * Clarify for the <<features-features-shaderStorageImageExtendedFormats>>
    feature and in the <<spirvenv-capabilities-table>> that the feature
    means that all of the formats are supported, and that otherwise the
    features can be queried per-format (internal issue 1273).
  * Clarified interactions of `VK_EXT_external_memory_host` with host cache
    management commands and structures flink:vkMapMemory,
    flink:vkFlushMappedMemoryRanges, slink:VkMappedMemoryRange, and
    flink:vkUnmapMemory using the new glossary term "`Host Mapped Device
    Memory`" (internal issue 1385).
  * Update the language for flink:vkCreateViSurfaceNN.txt describing the
    pname:currentExtent of a VI surface to more accurately reflect current
    capabilities, replacing "`undefined`" with more explicit behavior
    (internal issue 1410).

New Extensions:

  * `VK_EXT_calibrated_timestamps`
  * `VK_EXT_image_drm_format_modifier` (this extension was previously
    disabled in vk.xml, and has now been enabled after some changes to fix
    performance issues).
  * `VK_EXT_pci_bus_info`
  * `VK_EXT_transform_feedback`
  * `VK_GOOGLE_hlsl_functionality1`, exposing support for
    `SPV_GOOGLE_hlsl_functionality1`.
  * `VK_GOOGLE_decorate_string`, exposing support for
    `SPV_GOOGLE_decorate_string`.

Source: https://github.com/KhronosGroup/Vulkan-Docs/commit/0a7a04f32bd473bc7428efdbbbe132f33afad68c

New extensions
- VK_EXT_pci_bus_info
- VK_EXT_calibrated_timestamps
- VK_EXT_image_drm_format_modifier
- VK_EXT_transform_feedback
- VK_GOOGLE_decorate_string
- VK_GOOGLE_hlsl_functionality1

All Vulkan extensions are available here:
https://github.com/KhronosGroup/Vulkan-Docs/tree/master/appendices

[JeGX]

Change log for October 28, 2018 Vulkan 1.1.90 spec update:

  * Update release number to 90.

Public Issues:

  * Tag flink:vkQueueWaitIdle as `externsync` in `vk.xml` (public pull
    request 815).
  * Update README (public pull request 834).
  * `VK_NV_framebuffer_mixed_samples` and `VK_AMD_mixed_attachment_samples`
    had confusing and contradictory valid usage statements when read in the
    all-extensions spec build. Change them to explicitly mention which
    extension each is for (public issue Vulkan-ValidationLayers/issues/353).

Internal Issues:

  * Update `COPYING.md` to clarify how externally generated Vulkan
    Specifications (for translations, annotations, or other reasons) must be
    copyrighted, and acknowledge the Exception Clause on the `vk.xml`
    license (internal issue 1079).
  * Specify that flink:vkGetPhysicalDeviceImageFormatProperties may: return
    pname:maxMipLevels 1 if the format is ycbcr (internal issue 1361).
  * Clarify previously underspecified language for
    flink:vkCmdPushConstants::pname:pStageFlags regarding use of push
    constants across multiple pipelines (internal issue 1403).
  * Fix typo in XML/headers for
    ename:VK_STRUCTURE_TYPE_IMAGE_DRM_FORMAT_MODIFIER_EXPLICIT_CREATE_INFO_EXT,
    which was previously
    etext:VK_STRUCTURE_TYPE_IMAGE_EXCPLICIT_DRM_FORMAT_MODIFIER_CREATE_INFO_EXT
    (internal issue 1428).
  * Fix markup of equations that were sporadically breaking the
    `optimize-pdf` step of PDF generation, due (apparently) to inconsistent
    treatment of unwrapped multicharacter terms by different LaTeX parsers
    (internal issue 1435).
  * For the <<memory-model-synchronizes-with synchronizes-with>> memory
    model relation cases involving a release barrier plus relaxed atomic
    write, treat the atomic as if it were a release atomic and allow the
    acquire side to read from its hypothetical release sequence. This is
    more consistent with how C++ defines synchronization for release fences
    (internal issue cross-api/memory-model#72).
  * Minor editorial changes to the <<memory-model, memory model>> appendix
    based on external feedback.

source: https://github.com/KhronosGroup/Vulkan-Docs/commit/894211de5fe395af42ce6f2ce1d97ff70e212380

[JeGX]

Change log for November 4, 2018 Vulkan 1.1.91 spec update:

  * Update release number to 91.

Public Issues:

  * Update Ubuntu subsystem build instructions in `BUILD.adoc` (public pull
    request 624).
  * Delete the `VK_KHR_mir_surface` extension from the Specification and
    XML, due to EOL of the only driver known to have supported it, and
    near-EOL of Mir itself (public issue 814).
  * Fix options for some figures that were using old ones (public pull
    request 841).
  * Fix various accidentally repeated words (public pull request 843).
  * Use `time.process_time()`, introduced in Python 3.3, in the scripts
    instead of `time.clock()`, which will be removed in Python 3.8 (public
    pull request 844).

Internal Issues:

  * Update valid usage statements for
    `VK_ANDROID_external_memory_android_hardware_buffer` in
    slink:VkMemoryAllocateInfo,
    slink:VkImportAndroidHardwareBufferInfoANDROID, and
    flink:vkGetAndroidHardwareBufferPropertiesANDROID to actually be
    verifiable (internal issue 1419).
  * Update valid usage statements for
    `VK_ANDROID_external_memory_android_hardware_buffer` in
    slink:VkMemoryAllocateInfo, slink:VkImageCreateInfo, and
    slink:VkImageViewCreateInfo to move valid usage statements in
    doubly-nested bullet points up one level, accomodating limitations of
    the valid usage extraction script that creates `validusage.json`
    (internal issue 1434).
  * Fix typo etext:VK_ACCESS_SHADING_RATE_IMAGE_BIT_NV to the correct
    ename:VK_ACCESS_SHADING_RATE_IMAGE_READ_BIT_NV.
  * Add missing etext:VK_STRUCTURE_TYPE_* tokens to appendices for
    extensions missing them.

New Extensions:

  * `VK_AMD_memory_overallocation_behavior`
  * `VK_NV_ray_tracing`, replacing `VK_NVX_raytracing`

Link: https://github.com/KhronosGroup/Vulkan-Docs/commit/e24e42dcffe39c4f69719ea724958a9fe2d7b952

[JeGX]

Change log for November 12, 2018 Vulkan 1.1.92 spec update:

  * Update release number to 92.

Public Issues:

  * Move and modify valid usage statements dealing with pname:aspectMask in
    flink:vkCmdClearColorImage, flink:vkCmdClearDepthStencilImage, and
    slink:VkClearAttachment, so they are in places where all necessary
    information is available (public issue 529).
  * Fix math markup in <<textures-texel-anisotropic-filtering, Texel
    Anisotropic Filtering>> (public pull request 840).
  * Fix misspellings (public pull request 845).

Internal Issues:

  * Add installation instructions and a Makefile "`chunked`" target for
    chunked HTML generation (internal issue 1352).
  * Fix pipeline mesh diagram style; also fix a minor bug in the classic
    pipeline diagram where vertex/index buffers wrongly fed into the vertex
    shader (internal issue 1436).
  * Make asciidoctor ERROR output raise an error, and don't suppress
    executed command output from CI make invocation (internal issue 1454).
  * Minor typo fixes and clarifications for `VK_NV_raytracing`.
  * Cleanup extension-specific properties
  ** Remove duplicated documentation for pname:maxDiscardRectangles,
     pname:pointClippingBehavior, and pname:maxVertexAttribDivisor (they
     shouldn't be documented with the other members of
     slink:VkPhysicalDeviceLimits at all).
  ** Remove duplicate anchor for pname:maxVertexAttribDivisor
  ** Consistently document stext:VkPhysicalDevice<Extension>PropertiesKHR
  *** Always document pname:sType/pname:pNext (was inconsistent before)
  *** Always mention chaining to slink:VkPhysicalDeviceProperties2 (and not
      as slink:VkPhysicalDeviceProperties2KHR)
  *** Always include Valid Usage statements last
  * Update Makefile 'checklinks' target and associated scripts, and fix
    markup problems identified by checkLinks.py, so that we can rely on the
    checklinks script as part of Gitlab CI.

Source: https://github.com/KhronosGroup/Vulkan-Docs/commit/279452463adf97364575ea9e5bdf17e5b5a0a74c

[JeGX]

Change log for November 18, 2018 Vulkan 1.1.93 spec update:

  * Update release number to 93.

Public Issues:

  * Add spec language for ename:VK_INDEX_TYPE_NONE_NV and fix up
    slink:VkAccelerationStructureTypeNV (public issue 848).
  * Add missing suffix in description of slink:VkSubpassDescription2KHR
    parameters (public pull request 851).
  * Fix miscellaneous typos (public pull request 855).
  * Add driver ID for Pastel (public pull request 856).
  * Add missing include directive for slink:VkMemoryWin32HandlePropertiesKHR
    implicit valid usage statements (public pull request 857).

Internal Issues:

  * Restrict the storage classes permitted for SPIR-V atomics to what is
    actually supported, in the <<spirvenv-module-validation, Validation
    Rules within a Module>> section (internal issue 1123).
  * Add a missing Valid Usage statement to slink:VkRenderPassCreateInfo for
    the case pname:stencilLoadOp == ename:VK_LOAD_OP_CLEAR, pname:layout ==
    ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL (internal issue
    1408).
  * Modify optimize-pdf script and Makefile to retain non-optimized original
    PDF on errors (internal issue 1435).
  * Add <<spirvenv-module-validation, SPIR-V validation rules>> stating that
    only the listed code:BuiltIn decorations are permitted, and only when
    relevante features and extensions are enabled (internal issue 1449).
  * Remove some duplicated Valid Usage IDs created via cut & paste error
    (internal issue 1455).
  * Build HTML output for extension reference pages (internal issue 1461).
  ** Improve genRef.py handling of aliases defined inside other refpages.
  ** Emit aliases in pygenerator.py.
  ** Add XML noautovalidity flag for VkRenderPassCreateFlags until there
     are some corresponding FlagBits defined.
  ** Corrected types= attribute on some refpage blocks to 'flags'
  ** Added refpage blocks for some missing types detected by CI tests.
  * Fixed many Valid Usage statement issues in slink:VkRenderPassCreateInfo,
    slink:VkSubpassDescription, slink:VkSubpassDescription2KHR,
    slink:VkSubpassDependency2KHR, flink:vkCmdBeginRenderPass,
    flink:vkCmdBeginRenderPass2KHR, and slink:VkRenderPassBeginInfo
    discovered while adding `VK_KHR_create_renderpass2` to the validation
    layers.

New Extensions:

  * `VK_EXT_scalar_block_layout`
  * `VK_EXT_separate_stencil_usage`

source: https://github.com/KhronosGroup/Vulkan-Docs/commit/256a1ef66182b2d458148f2fdea183557ea3f507