Jon Leech 6012d138c7 Change log for October 6, 2017 Vulkan 1.0.62 spec update:
* Bump API patch number and header version number to 62 for this update.

Github Issues:

  * Move asciidoc conditionals for `VK_KHR_maintenance1` in
    slink:VkDescriptorSetAllocateInfo so valid usage statements for
    `VK_KHR_push_descriptor` aren't accidentally removed when the first
    extension isn't enabled (public issue 573).
  * Fixed errors in API example code for
    flink:vkUpdateDescriptorSetWithTemplateKHR and
    flink:vkCmdPushDescriptorSetWithTemplateKHR (public issue 577).

Internal Issues:

  * Specify constraints on concurrent access to fences that share payload in
    the <<synchronization-fences-importing, Importing Fence Payloads>> and
    <<synchronization-semaphores-waiting-state, Semaphore State Requirements
    For Wait Operations>> sections (internal issue 820).
  * Define the term "`retired swapchain`", reorganize some swapchain
    language, and improve language for pname:oldSwapchain in
    flink:VkSwapchainCreateInfoKHR, the <<swapchain-wsi-image-create-info>>
    table, flink:vkDestroySwapchainKHR, and flink:vkAcquireNextImage2KHX
    (internal issue 869).
  * Describe in the <<writing-arrays, Describing Properties of Array
    Elements>> section of the style guide how and when to use "`each`" and
    "`any`" to refer to properties of array elements, and make those uses in
    the specification consistent (internal issue 884).
  * Clarified that events cannot be used for cross-queue synchronization in
    the <<synchronization-events, Events>> section and for
    flink:vkCmdWaitEvents (internal issue 970).
  * Add success and error codes to +vk.xml+ for
    flink:vkCreateValidationCacheEXT (internal issue 995).
  * Clarify aspect mask usage for image memory barriers of multi-plane
    images in slink:VkImageSubresourceRange, slink:VkImageMemoryBarrier, and
    the <<textures-layout-validation, Layout Validation>> section (internal
    issue 996).

Other Issues:

  * Fixed typo in flink:VkRenderPassSampleLocationsBeginInfoEXT (renamed
    field pname:pSubpassSampleLocations to
    pname:pPostSubpassSampleLocations).
  * Add missing buffer usage requirements for indirect draws in
    flink:vkCmdDrawIndirect, flink:vkCmdDrawIndirectCountAMD,
    flink:vkCmdDrawIndexedIndirect, and
    flink:vlCmdDrawIndexedIndirectCountAMD.
  * Modify Makefile to allow specification to build in git "`detached HEAD`"
    state.
  * Update valid usage ID generation script to allow recursively operating
    on all `.txt` files in a specified directory, and move the `startVUID`
    tracking information into a separate python file that is automatically
    updated by the script.

New Extensions:

  * Add +vk.xml+ entries for pending `VK_ANDROID_native_buffer` extension
    (note, this extension is not yet enabled).
  * `VK_AMD_shader_image_load_store_lod`
2017-10-06 21:51:59 -07:00

Vulkan^(R)^ API Documentation Project
=====================================

This repository contains formal documentation of the Vulkan API. This
includes the main API Specification, the reference (man) pages, the XML API
Registry, and related tools and scripts.

Single-Branch Model
-------------------

As of the 1.0.25 release, we have switched to a new "`single-branch`" model
in which all extensions are included in the source of the 1.0 branch of the
Specification, and can be configured in or out of the build using Makefile
options.

Repository Structure
--------------------

```
README.adoc             This file
ChangeLog.txt           Change log summary for each public spec update
doc/specs/              Main documentation tree
    vulkan/             Vulkan specification
        appendices/     Appendices - one file each
        chapters/       Chapters - one file each
        config/         asciidoc configuration
        images/         Images (figures, diagrams, icons)
        man/            Reference (manual) pages for API, mostly extracted from the spec source
    misc/               Related specifications (GL_KHR_vulkan_glsl)
src/spec/               XML API Registry (vk.xml) and related scripts
src/vulkan/             Vulkan headers, generated from the Registry
```

Building the Specification and Reference Pages
----------------------------------------------

As of the 1.0.40 release, we have moved from the old `asciidoc` toolchain to
a new one based on `asciidoctor`. See `doc/specs/vulkan/README.adoc` for
more information on installing the toolchain and building the Specification.

Generating Headers and Related Files
------------------------------------

The header file (`src/vulkan/vulkan.h`) and many parts of the specification
and reference page documents are generated from descriptions in the XML API
Registry (`src/spec/vk.xml`). The generated files, with the exception of
`vulkan.h`, are not checked into the repository. If you change `vk.xml`, you
can regenerate the header by going to `src/spec` and running:

    $ make clobber install

The other generated files are built as required via dependencies in
`doc/specs/vulkan/Makefile` .
Description
The Vulkan API Specification and related tools
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