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22a5a1459f
* Update release number to 124.
Github Issues:
* Fix Makefile SPECREMARK macro to work when not building in a git tree
(public issue 992).
* Ignore pname:aspectMask for unused attachments in
slink:VkSubpassDescription2KHR valid usage statements (public pull
request 1028).
* Minor markup / spelling fixes (public pull requests 1035, 1045).
Internal Issues:
* Fix markup in Valid Usage statement for slink:VkCreateFramebuffer
(internal issue 1823).
* Add a new <<synchronization-signal-operation-order, _signal operation
order_>> section to the synchronization chapter which describes in
detail the ordering guarantees provided by the API between fence and
semaphore signal operations (internal merge request 3368).
* Move generated `appendix/meta/` files into the Makefile GENERATED
directory (internal merge request 3381).
New Extensions
* `<<VK_KHR_shader_clock>>`
* `<<VK_KHR_timeline_semaphore>>`
58 lines
1.3 KiB
Plaintext
58 lines
1.3 KiB
Plaintext
include::{generated}/meta/VK_EXT_shader_demote_to_helper_invocation.txt[]
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*Last Modified Date*::
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2019-06-01
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*IP Status*::
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No known IP claims.
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*Contributors*::
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- Jeff Bolz, NVIDIA
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This extension adds Vulkan support for the
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{spirv}/EXT/SPV_EXT_demote_to_helper_invocation.html[`SPV_EXT_demote_to_helper_invocation`]
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SPIR-V extension.
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That SPIR-V extension provides a new instruction
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code:OpDemoteToHelperInvocationEXT allowing shaders to "demote" a fragment
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shader invocation to behave like a helper invocation for its duration.
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The demoted invocation will have no further side effects and will not output
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to the framebuffer, but remains active and can participate in computing
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derivatives and in subgroup operations.
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This is a better match for the "discard" instruction in HLSL.
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=== New Object Types
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None.
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=== New Enum Constants
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* Extending elink:VkStructureType:
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** ename:VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_DEMOTE_TO_HELPER_INVOCATION_FEATURES_EXT
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=== New Enums
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None.
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=== New Structures
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* slink:VkPhysicalDeviceShaderDemoteToHelperInvocationFeaturesEXT
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=== New Functions
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None.
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=== New SPIR-V Capability
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* <<spirvenv-capabilities-table-demote,DemoteToHelperInvocationEXT>>
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=== Issues
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None.
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=== Examples
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None.
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=== Version History
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* Revision 1, 2019-06-01 (Jeff Bolz)
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- Initial draft
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