VK_EXT_fragment_shader_interlock
Other Extension Metadata
Last Modified Date
2019-05-02
Interactions and External Dependencies
- This extension provides API support for
GL_ARB_fragment_shader_interlock
Contributors
- Daniel Koch, NVIDIA
- Graeme Leese, Broadcom
- Jan-Harald Fredriksen, Arm
- Faith Ekstrand, Intel
- Jeff Bolz, NVIDIA
- Ruihao Zhang, Qualcomm
- Slawomir Grajewski, Intel
- Spencer Fricke, Samsung
Description
This extension adds support for the FragmentShaderPixelInterlockEXT,
FragmentShaderSampleInterlockEXT, and
FragmentShaderShadingRateInterlockEXT capabilities from the
SPV_EXT_fragment_shader_interlock extension to Vulkan.
Enabling these capabilities provides a critical section for fragment shaders to avoid overlapping pixels being processed at the same time, and certain guarantees about the ordering of fragment shader invocations of fragments of overlapping pixels.
This extension can be useful for algorithms that need to access per-pixel data structures via shader loads and stores. Algorithms using this extension can access per-pixel data structures in critical sections without other invocations accessing the same per-pixel data. Additionally, the ordering guarantees are useful for cases where the API ordering of fragments is meaningful. For example, applications may be able to execute programmable blending operations in the fragment shader, where the destination buffer is read via image loads and the final value is written via image stores.
New Structures
- Extending VkPhysicalDeviceFeatures2, VkDeviceCreateInfo:
New Enum Constants
VK_EXT_FRAGMENT_SHADER_INTERLOCK_EXTENSION_NAMEVK_EXT_FRAGMENT_SHADER_INTERLOCK_SPEC_VERSION- Extending VkStructureType:
VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADER_INTERLOCK_FEATURES_EXT
New SPIR-V Capabilities
Version History
- Revision 1, 2019-05-24 (Piers Daniell)
- Internal revisions