Contact
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Mathieu Robart [GitHub]mathieurobart-arm
Other Extension Metadata
- Last Modified Date
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2025-01-07
- IP Status
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No known IP claims.
- Contributors
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Mathieu Robart, Arm
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Marius Bjorge, Arm
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Yaozhong Zhang, Arm
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Jan-Harald Fredriksen, Arm
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Description
The Opacity Micromap extension VK_EXT_opacity_micromap
supports the new
pipeline creation flag
VK_PIPELINE_CREATE_RAY_TRACING_OPACITY_MICROMAP_BIT_EXT
, indicating that
the ray tracing pipeline may be used with acceleration structures
referencing micromaps.
This allows for possible optimizations, knowing beforehand that opacity
micromaps may be used with the pipeline.
An equivalent flag does not exist for pipelines supporting Ray Query with opacity micromaps, such as graphics and compute. Consequently, it is currently not possible to optimize such pipelines for no-opacity, e.g. when opacity micromaps are supported by an application but not used by the pipeline. This may lead to performance degradation.
This extension adds a new flag,
VK_PIPELINE_CREATE_2_DISALLOW_OPACITY_MICROMAP_BIT_ARM
, indicating that a
pipeline will NOT be used with an acceleration structure referencing an
opacity micromap, therefore allowing possible pipeline optimizations.
New Enum Constants
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VK_ARM_PIPELINE_OPACITY_MICROMAP_EXTENSION_NAME
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VK_ARM_PIPELINE_OPACITY_MICROMAP_SPEC_VERSION
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Extending VkPipelineCreateFlagBits2:
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VK_PIPELINE_CREATE_2_DISALLOW_OPACITY_MICROMAP_BIT_ARM
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Extending VkStructureType:
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VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PIPELINE_OPACITY_MICROMAP_FEATURES_ARM
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Document Notes
For more information, see the Vulkan Specification
This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.