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0cc6bba634
* Bump API patch number and header version number to 61 for this update.
Github Issues:
* Provide alternate length attributes (altlen=) in the XML schema, for
those using length attributes to generate code instead of documentation
(public issue 555).
* Fix erroneous references to `latex:` being used for asciidoc math
markup, rather than `latexmath:` (public pull request 556).
* Add author ID to XML for Kazan software renderer (public pull request
557).
Internal Issues:
* Add the <<fundamentals-abi,Application Binary Interface>> section
describing platform ABI requirements and recommendations, add examples
of function and function pointer declarations to the
<<boilerplate-platform-specific-calling-conventions, Platform-Specific
Calling Conventions>> section, and remove related language that existed
elsewhere in the specification (internal issue 64).
* Describe where to document valid usage interactions of chained
structures in the style guide, and fix one case now appearing in
slink:VkBufferCreateInfo instead of the child
slink:VkDedicatedAllocationBufferCreateInfoNV structure (internal issue
715).
* Add example to the style guide of describing enumerated types which are
empty when the spec is built without relevant extensions enabled, and
apply it to existing examples for
elink:VkDescriptorSetLayoutCreateFlagBits and
elink:VkSubpassDescriptionFlagBits (internal issue 864).
* Add a note to the <<fundamentals-validusage-enums, Valid Usage for
Enumerated Types>> section that the special values suffixed with
etext:_BEGIN_RANGE, etext:_END_RANGE, etext:_RANGE_SIZE and
etext:_MAX_ENUM are not part of the API and should: not be used by
applications (internal issue 872).
* Added note to flink:vkCmdUpdateBuffers explaining the performance
penalty for copies done in this way, and why the upper copy limit is
what it is (internal issue 952).
* Update `VK_KHX_device_group` to split some functionality into the new
`VK_KHR_bind_memory2` extension, and rename that functionality (internal
issue 969).
* Remove *Status* fields from extension appendices, since they are by
definition published and complete by the time they reach the public
github repository (internal issue 973).
Other Issues:
* Update Data Format specification dependency to version 1.2 and change
references to DF sections accordingly.
* Update XML to make the pname:pAllocator parameter of
flink:vkRegisterDeviceEventEXT and flink:vkRegisterDisplayEventEXT in
the `VK_EXT_display_control` extension as optional.
New Extensions:
* `VK_KHR_bind_memory2`
* `VK_KHR_image_format_list`
* `VK_KHR_maintenance2`
* `VK_KHR_sampler_ycbcr_conversion`
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include::meta/VK_EXT_post_depth_coverage.txt[]
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*Last Modified Date*::
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2017-07-17
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*Interactions and External Dependencies*::
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- This extension requires the
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https://www.khronos.org/registry/spir-v/extensions/KHR/SPV_KHR_post_depth_coverage.html[+SPV_KHR_post_depth_coverage+]
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SPIR-V extension.
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- This extension requires
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https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_post_depth_coverage.txt[+GL_ARB_post_depth_coverage+]
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or
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https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_post_depth_coverage.txt[+GL_EXT_post_depth_coverage+]
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for GLSL-based source languages.
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*Contributors*::
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- Jeff Bolz, NVIDIA
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This extension adds support for the following SPIR-V extension in Vulkan:
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* +SPV_KHR_post_depth_coverage+
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which allows the fragment shader to control whether values in the
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code:SampleMask built-in input variable reflect the coverage after the
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<<fragops-early,early per-fragment>> depth and stencil tests are applied.
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This extension adds a new code:PostDepthCoverage execution mode under the
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code:SampleMaskPostDepthCoverage capability.
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When this mode is specified along with code:EarlyFragmentTests, the value of
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an input variable decorated with the
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<<interfaces-builtin-variables-samplemask, code:SampleMask>> built-in
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reflects the coverage after the <<shaders-fragment-earlytest, early fragment
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tests>> are applied.
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Otherwise, it reflects the coverage before the depth and stencil tests.
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When using GLSL source-based shading languages, the code:post_depth_coverage
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layout qualifier from GL_ARB_post_depth_coverage or
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GL_EXT_post_depth_coverage maps to the code:PostDepthCoverage execution
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mode.
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=== New Object Types
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None.
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=== New Enum Constants
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None.
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=== New Enums
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None.
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=== New Structures
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None.
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=== New Functions
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None.
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=== New Built-In Variables
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None.
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=== New Variable Decoration
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None.
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=== New SPIR-V Capabilities
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* <<spirvenv-capabilities-table-postdepthcoverage,SampleMaskPostDepthCoverage>>
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=== Issues
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None yet.
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=== Version History
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* Revision 1, 2017-07-17 (Daniel Koch)
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- Internal revisions
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