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f1a7c4b4f3
* Update release number to 98.
Public Issues:
* Fix missing markup in flink:vkDestroyPipelineLayout valid usage
statement (pull request 882).
* Add missing contributors for `<<VK_EXT_buffer_device_address>>` (public
pull request 891).
Internal Issues:
* Detect nested bullet points in valid usage blocks and warn about them
during VUID assignment (internal issue 1382).
* Update the style guide to document the process for reserving new bits in
bitmask types (internal issue 1411).
* Clarify for slink:VkApplicationInfo::pname:apiVersion and in the
<<fundamentals-validusage-versions, Valid Usage for Newer Core
Versions>> section when it is valid for an application to use a certain
version of Vulkan API functionality (for an instance and for a
device/physical device); and when the validation layers must generate an
error (internal issue 1412).
* Add optional <<memory-model-availability-visibility, transitive
availability/visibility operations to the memory model, including a new
pname:vulkanMemoryModelAvailabilityVisibilityChains feature for
slink:VkPhysicalDeviceVulkanMemoryModelFeaturesKHR (internal issue
1460).
* Add the code:StorageBuffer storage class to those in the
<<interfaces-resources-descset, Descriptor Set Interface>> (internal
issue 1480).
* Add missing `returnedonly` tags for a number of returned extension
structures that can be passed in pname:pNext chains (internal issue
1515).
* Clean up and rearrange some spec language for
slink:VkRenderPassCreateInfo and slink:VkAttachmentReference.txt
(internal issue 1522).
* Correctly round the code:OpVectorTimesScalar and
code:OpMatrixTimesScalar SPIR-V operations in the <<Precision of core
SPIR-V Instructions>> table (internal merge request 2996).
* Work around cases in flink:vkCmdBeginTransformFeedbackEXT,
flink:vkCmdEndTransformFeedbackEXT, and
slink:VkPipelineCoverageModulationStateCreateInfoNV where an array
parameter is `optional` but the length is not in `vk.xml`. This is an
interim fix using `noautovalidity` + handcoded VU replacing those that
should be autogenerated (internal issue 2944 and
https://github.com/KhronosGroup/Vulkan-ValidationLayers/issues/480).
* Remove redundant capability validation of the code:float16 and code:int8
SPIR-V capabilities from the <<spirvenv-capabilities, Capabilities>>
section, since they are already covered in the preceding table.
* Update check_spec_links script, including validation for reference page
open blocks. Fix errors identified by the script.
79 lines
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79 lines
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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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