Other Extension Metadata
- Last Modified Date
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2022-03-10
- IP Status
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No known IP claims.
- Interactions and External Dependencies
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This extension requires
SPV_KHR_fragment_shader_barycentric
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This extension provides API support for
GL_EXT_fragment_shader_barycentric
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- Contributors
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Stu Smith, AMD
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Tobias Hector, AMD
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Graeme Leese, Broadcom
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Jan-Harald Fredriksen, Arm
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Slawek Grajewski, Intel
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Pat Brown, NVIDIA
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Hans-Kristian Arntzen, Valve
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Contributors to the VK_NV_fragment_shader_barycentric specification
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Description
This extension is based on the VK_NV_fragment_shader_barycentric
extension, and adds support for the following SPIR-V extension in Vulkan:
The extension provides access to three additional fragment shader variable decorations in SPIR-V:
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PerVertexKHR
, which indicates that a fragment shader input will not have interpolated values, but instead must be accessed with an extra array index that identifies one of the vertices of the primitive producing the fragment -
BaryCoordKHR
, which indicates that the variable is a three-component floating-point vector holding barycentric weights for the fragment produced using perspective interpolation -
BaryCoordNoPerspKHR
, which indicates that the variable is a three-component floating-point vector holding barycentric weights for the fragment produced using linear interpolation
When using GLSL source-based shader languages, the following variables from
GL_EXT_fragment_shader_barycentric
map to these SPIR-V built-in
decorations:
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in vec3 gl_BaryCoordEXT;
→BaryCoordKHR
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in vec3 gl_BaryCoordNoPerspEXT;
→BaryCoordNoPerspKHR
GLSL variables declared using the pervertexEXT
GLSL qualifier are
expected to be decorated with PerVertexKHR
in SPIR-V.
New Enum Constants
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VK_KHR_FRAGMENT_SHADER_BARYCENTRIC_EXTENSION_NAME
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VK_KHR_FRAGMENT_SHADER_BARYCENTRIC_SPEC_VERSION
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Extending VkStructureType:
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VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADER_BARYCENTRIC_FEATURES_KHR
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VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADER_BARYCENTRIC_PROPERTIES_KHR
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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.