Change log for September 8, 2019 Vulkan 1.1.122 spec update:
* 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).
2019-09-08 20:41:02 -07:00
|
|
|
include::meta/VK_IMG_format_pvrtc.txt[]
|
|
|
|
|
|
|
|
|
|
*Last Modified Date*::
|
|
|
|
|
2019-09-02
|
|
|
|
|
*IP Status*::
|
|
|
|
|
Imagination Technologies Proprietary
|
|
|
|
|
*Contributors*::
|
|
|
|
|
- Stuart Smith, Imagination Technologies
|
|
|
|
|
|
|
|
|
|
`VK_IMG_format_pvrtc` provides additional texture compression functionality
|
|
|
|
|
specific to Imagination Technologies PowerVR Texture compression format
|
|
|
|
|
(called PVRTC).
|
|
|
|
|
|
|
|
|
|
=== New Object Types
|
|
|
|
|
|
|
|
|
|
None.
|
|
|
|
|
|
|
|
|
|
=== New Enum Constants
|
|
|
|
|
|
|
|
|
|
* Extending elink:VkFormat:
|
|
|
|
|
** ename:VK_FORMAT_PVRTC1_2BPP_UNORM_BLOCK_IMG
|
|
|
|
|
** ename:VK_FORMAT_PVRTC1_4BPP_UNORM_BLOCK_IMG
|
|
|
|
|
** ename:VK_FORMAT_PVRTC2_2BPP_UNORM_BLOCK_IMG
|
|
|
|
|
** ename:VK_FORMAT_PVRTC2_4BPP_UNORM_BLOCK_IMG
|
|
|
|
|
** ename:VK_FORMAT_PVRTC1_2BPP_SRGB_BLOCK_IMG
|
|
|
|
|
** ename:VK_FORMAT_PVRTC1_4BPP_SRGB_BLOCK_IMG
|
|
|
|
|
** ename:VK_FORMAT_PVRTC2_2BPP_SRGB_BLOCK_IMG
|
|
|
|
|
** ename:VK_FORMAT_PVRTC2_4BPP_SRGB_BLOCK_IMG
|
|
|
|
|
|
|
|
|
|
=== New Enum Constants
|
|
|
|
|
|
|
|
|
|
None.
|
|
|
|
|
|
|
|
|
|
=== New Structures
|
|
|
|
|
|
|
|
|
|
None.
|
|
|
|
|
|
|
|
|
|
=== New Functions
|
|
|
|
|
|
|
|
|
|
None.
|
|
|
|
|
|
|
|
|
|
=== Issues
|
|
|
|
|
|
|
|
|
|
None.
|
|
|
|
|
|
|
|
|
|
=== Version History
|
|
|
|
|
|
|
|
|
|
* Revision 1, 2019-09-02 (Stuart Smith)
|
|
|
|
|
- Initial version
|
|
|
|
|
|