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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>>`
79 lines
2.5 KiB
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79 lines
2.5 KiB
Plaintext
include::{generated}/meta/VK_EXT_fragment_shader_interlock.txt[]
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*Last Modified Data*::
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2019-05-02
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*Interactions and External Dependencies*::
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- This extension requires the
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{spirv}/EXT/SPV_EXT_fragment_shader_interlock.html[`SPV_EXT_fragment_shader_interlock`]
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SPIR-V extension.
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- This extension requires the
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https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_fragment_shader_interlock.txt[`GL_ARB_fragment_shader_interlock`],
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extensions for GLSL source languages.
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*Contributors*::
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- Daniel Koch, NVIDIA
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- Graeme Leese, Broadcom
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- Jan-Harald Fredriksen, Arm
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- Jason Ekstrand, Intel
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- Jeff Bolz, NVIDIA
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- Ruihao Zhang, Qualcomm
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- Slawomir Grajewski, Intel
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- Spencer Fricke, Samsung
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This extension adds support for the code:FragmentShaderPixelInterlockEXT,
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code:FragmentShaderSampleInterlockEXT, and
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code:FragmentShaderShadingRateInterlockEXT capabilities from the
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`SPV_EXT_fragment_shader_interlock` extension to Vulkan.
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Enabling these capabilities provides a critical section for fragment shaders
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to avoid overlapping pixels being processed at the same time, and certain
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guarantees about the ordering of fragment shader invocations of fragments of
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overlapping pixels.
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This extension can be useful for algorithms that need to access per-pixel
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data structures via shader loads and stores.
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Algorithms using this extension can access per-pixel data structures in
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critical sections without other invocations accessing the same per-pixel
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data.
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Additionally, the ordering guarantees are useful for cases where the API
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ordering of fragments is meaningful.
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For example, applications may be able to execute programmable blending
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operations in the fragment shader, where the destination buffer is read via
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image loads and the final value is written via image stores.
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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_FRAGMENT_SHADER_INTERLOCK_FEATURES_EXT
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=== New Enums
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None.
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=== New Structures
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* Extending slink:VkPhysicalDeviceFeatures2:
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** slink:VkPhysicalDeviceFragmentShaderInterlockFeaturesEXT
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=== New Functions
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None.
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=== New SPIR-V Capabilities
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* <<spirvenv-capabilities-table-fragmentShaderInterlock,FragmentShaderInterlockEXT>>
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* <<spirvenv-capabilities-table-fragmentShaderInterlock,FragmentShaderPixelInterlockEXT>>
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* <<spirvenv-capabilities-table-fragmentShaderInterlock,FragmentShaderShadingRateInterlockEXT>>
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=== Issues
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None.
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=== Version History
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* Revision 1, 2019-05-24 (Piers Daniell)
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- Internal revisions
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