194a7f4d0d
* Update release number to 122.
Internal Issues:
* Add style guide language on not using standalone `+` signs (internal
issue 736); not using leading whitespace for markup (internal issue
747); and on keeping descriptions of a single API in a contiguous block
of markup (internal issue 949), and apply them to the specification.
* Add a glossary definition of "`constant integral expression`", pointing
to the SPIR-V "`constant instruction`" definition (internal issue 1225).
* Many minor edits to improve writing style consistency and capture
additional style guidelines (internal issue 1553).
* Clarify that <<fragops-depth-write, depth writes are not performed>> if
there is no depth framebuffer attachment (internal issue 1771).
* Allow implementations to use rectangular line style of interpolation for
<<primsrast-lines-bresenham, wide Bresenham lines>>, though replicating
attributes is still preferred. Clarify that code:FragCoord is not
replicated (internal issue 1772).
* Resolve a contradiction in valid usage statements for
slink:VkImageCreateInfo and slink:VkImageStencilUsageCreateInfoEXT
(internal issue 1773).
* Add style guide discussion of markup for indented equations, and use
markup workaround for asciidoctor 2 compatibility (internal issue 1793).
* Deprecate the `<<VK_EXT_validation_flags>>` extension in `vk.xml` and
the extension appendix (internal issue 1801).
* Add a new checker script `scripts/xml_consistency.py`. This is not
currently run as part of internal CI (internal merge request 3285).
* Correct "`an`" -> "`a`" prepositions where needed (internal merge
request 3334).
* Clarify that the <<features-uniformBufferStandardLayout,
pname:uniformBufferStandardLayout>> feature is only required when the
extension defining it is supported (internal merge request 3341).
* Bring scripts into closer sync with OpenXR, mainly through conversion of
comments to docstrings where appropriate, and add gen-scripts-docs.sh
(internal merge request 3324).
* Correct pname:maxDrawMeshTasksCount to 2^16^-1 in the <<limits-required,
Required Limits>> table (internal merge requests 3361).
New Extensions
* `<<VK_IMG_format_pvrtc>>` (public issue 512).
Vulkan Asciidoc Configuration Files
Macros
The macros in spec-macros.rb and spec-macros/extension.rb are
described in the "Vulkan Documentation and Extensions: Procedures and
Conventions" document (see the styleguide).
Support for Math
Asciidoctor is customized to insert KaTeX <script> tags from
math.js for HTML5, and properly pass through math which has
\begin{}\/end{} delimiters instead of $$[].
For PDF builds, asciidoctor-mathematical is used to generate
math-docbook.conf is heavily conditionalized depending on whether the
final output format (which should be described in the a2x-format variable)
is pdf or not, since Docbook passes through math differently to dblatex
vs. the XHTML stylesheets. This could be simplified now that we're only
using Docbook for PDFs.
Stylesheets
khronos.css is the stylesheet used for HTML output.
Chunked Spec Index
chunkindex contains scripts for building and using a search index for the
Vulkan chunked HTML specification.