content: {-# language CPP #-}
  -- | = Name
  --
  -- VK_NV_fragment_shader_barycentric - device extension
  --
  -- == VK_NV_fragment_shader_barycentric
  --
  -- [__Name String__]
  --     @VK_NV_fragment_shader_barycentric@
  --
  -- [__Extension Type__]
  --     Device extension
  --
  -- [__Registered Extension Number__]
  --     204
  --
  -- [__Revision__]
  --     1
  --
  -- [__Ratification Status__]
  --     Not ratified
  --
  -- [__Extension and Version Dependencies__]
  --     <https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#VK_KHR_get_physical_device_properties2 VK_KHR_get_physical_device_properties2>
  --
  -- [__SPIR-V Dependencies__]
  --
  --     -   <https://htmlpreview.github.io/?https://github.com/KhronosGroup/SPIRV-Registry/blob/master/extensions/NV/SPV_NV_fragment_shader_barycentric.html SPV_NV_fragment_shader_barycentric>
  --
  -- [__Deprecation State__]
  --
  --     -   /Promoted/ to
  --         <https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#VK_KHR_fragment_shader_barycentric VK_KHR_fragment_shader_barycentric>
  --         extension
  --
  -- [__Contact__]
  --
  --     -   Pat Brown
  --         <https://github.com/KhronosGroup/Vulkan-Docs/issues/new?body=[VK_NV_fragment_shader_barycentric] @nvpbrown%0A*Here describe the issue or question you have about the VK_NV_fragment_shader_barycentric extension* >
  --
  -- == Other Extension Metadata
  --
  -- [__Last Modified Date__]
  --     2018-08-03
  --
  -- [__IP Status__]
  --     No known IP claims.
  --
  -- [__Interactions and External Dependencies__]
  --
  --     -   This extension provides API support for
  --         <https://github.com/KhronosGroup/GLSL/blob/master/extensions/nv/GLSL_NV_fragment_shader_barycentric.txt GL_NV_fragment_shader_barycentric>
  --
  -- [__Contributors__]
  --
  --     -   Pat Brown, NVIDIA
  --
  --     -   Daniel Koch, NVIDIA
  --
  -- == Description
  --
  -- This extension adds support for the following SPIR-V extension in
  -- Vulkan:
  --
  -- -   <https://htmlpreview.github.io/?https://github.com/KhronosGroup/SPIRV-Registry/blob/master/extensions/NV/SPV_NV_fragment_shader_barycentric.html SPV_NV_fragment_shader_barycentric>
  --
  -- The extension provides access to three additional fragment shader
  -- variable decorations in SPIR-V:
  --
  -- -   @PerVertexNV@, 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
  --
  -- -   @BaryCoordNV@, which indicates that the variable is a
  --     three-component floating-point vector holding barycentric weights
  --     for the fragment produced using perspective interpolation
  --
  -- -   @BaryCoordNoPerspNV@, 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_NV_fragment_shader_barycentric@ maps to these SPIR-V built-in
  -- decorations:
  --
  -- -   @in vec3 gl_BaryCoordNV;@ → @BaryCoordNV@
  --
  -- -   @in vec3 gl_BaryCoordNoPerspNV;@ → @BaryCoordNoPerspNV@
  --
  -- GLSL variables declared using the @__pervertexNV@ GLSL qualifier are
  -- expected to be decorated with @PerVertexNV@ in SPIR-V.
  --
  -- == Promotion to @VK_KHR_fragment_shader_barycentric@
  --
  -- All functionality in this extension is included in
  -- @VK_KHR_fragment_shader_barycentric@, with the suffix changed to KHR.
  --
  -- == New Structures
  --
  -- -   Extending
  --     'Vulkan.Core11.Promoted_From_VK_KHR_get_physical_device_properties2.PhysicalDeviceFeatures2',
  --     'Vulkan.Core10.Device.DeviceCreateInfo':
  --
  --     -   'PhysicalDeviceFragmentShaderBarycentricFeaturesNV'
  --
  -- == New Enum Constants
  --
  -- -   'NV_FRAGMENT_SHADER_BARYCENTRIC_EXTENSION_NAME'
  --
  -- -   'NV_FRAGMENT_SHADER_BARYCENTRIC_SPEC_VERSION'
  --
  -- -   Extending 'Vulkan.Core10.Enums.StructureType.StructureType':
  --
  --     -   'STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADER_BARYCENTRIC_FEATURES_NV'
  --
  -- == New Built-In Variables
  --
  -- -   <https://registry.khronos.org/vulkan/specs/1.3-extensions/html/vkspec.html#interfaces-builtin-variables-barycoordkhr BaryCoordNV>
  --
  -- -   <https://registry.khronos.org/vulkan/specs/1.3-extensions/html/vkspec.html#interfaces-builtin-variables-barycoordnoperspkhr BaryCoordNoPerspNV>
  --
  -- == New SPIR-V Decorations
  --
  -- -   <https://registry.khronos.org/vulkan/specs/1.3-extensions/html/vkspec.html#shaders-interpolation-decorations-pervertexkhr PerVertexNV>
  --
  -- == New SPIR-V Capabilities
  --
  -- -   <https://registry.khronos.org/vulkan/specs/1.3-extensions/html/vkspec.html#spirvenv-capabilities-table-FragmentBarycentricKHR FragmentBarycentricNV>
  --
  -- == Issues
  --
  -- (1) The AMD_shader_explicit_vertex_parameter extension provides similar
  -- functionality. Why write a new extension, and how is this extension
  -- different?
  --
  -- __RESOLVED__: For the purposes of Vulkan\/SPIR-V, we chose to implement
  -- a separate extension due to several functional differences.
  --
  -- First, the hardware supporting this extension can provide a
  -- three-component barycentric weight vector for variables decorated with
  -- @BaryCoordNV@, while variables decorated with @BaryCoordSmoothAMD@
  -- provide only two components. In some cases, it may be more efficient to
  -- explicitly interpolate an attribute via:
  --
  -- > float value = (baryCoordNV.x * v[0].attrib +
  -- >                baryCoordNV.y * v[1].attrib +
  -- >                baryCoordNV.z * v[2].attrib);
  --
  -- instead of
  --
  -- > float value = (baryCoordSmoothAMD.x * (v[0].attrib - v[2].attrib) +
  -- >                baryCoordSmoothAMD.y * (v[1].attrib - v[2].attrib) +
  -- >                v[2].attrib);
  --
  -- Additionally, the semantics of the decoration @BaryCoordPullModelAMD@ do
  -- not appear to map to anything supported by the initial hardware
  -- implementation of this extension.
  --
  -- This extension provides a smaller number of decorations than the AMD
  -- extension, as we expect that shaders could derive variables decorated
  -- with things like @BaryCoordNoPerspCentroidAMD@ with explicit attribute
  -- interpolation instructions. One other relevant difference is that
  -- explicit per-vertex attribute access using this extension does not
  -- require a constant vertex number.
  --
  -- (2) Why do the built-in SPIR-V decorations for this extension include
  -- two separate built-ins @BaryCoordNV@ and @BaryCoordNoPerspNV@ when a “no
  -- perspective” variable could be decorated with @BaryCoordNV@ and
  -- @NoPerspective@?
  --
  -- __RESOLVED__: The SPIR-V extension for this feature chose to mirror the
  -- behavior of the GLSL extension, which provides two built-in variables.
  -- Additionally, it is not clear that its a good idea (or even legal) to
  -- have two variables using the “same attribute”, but with different
  -- interpolation modifiers.
  --
  -- == Version History
  --
  -- -   Revision 1, 2018-08-03 (Pat Brown)
  --
  --     -   Internal revisions
  --
  -- == See Also
  --
  -- 'PhysicalDeviceFragmentShaderBarycentricFeaturesNV'
  --
  -- == Document Notes
  --
  -- For more information, see the
  -- <https://registry.khronos.org/vulkan/specs/1.3-extensions/html/vkspec.html#VK_NV_fragment_shader_barycentric Vulkan Specification>
  --
  -- This page is a generated document. Fixes and changes should be made to
  -- the generator scripts, not directly.
  module Vulkan.Extensions.VK_NV_fragment_shader_barycentric  ( pattern STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADER_BARYCENTRIC_FEATURES_NV
                                                              , PhysicalDeviceFragmentShaderBarycentricFeaturesNV
                                                              , NV_FRAGMENT_SHADER_BARYCENTRIC_SPEC_VERSION
                                                              , pattern NV_FRAGMENT_SHADER_BARYCENTRIC_SPEC_VERSION
                                                              , NV_FRAGMENT_SHADER_BARYCENTRIC_EXTENSION_NAME
                                                              , pattern NV_FRAGMENT_SHADER_BARYCENTRIC_EXTENSION_NAME
                                                              , PhysicalDeviceFragmentShaderBarycentricFeaturesKHR(..)
                                                              ) where
  
  import Data.String (IsString)
  import Vulkan.Extensions.VK_KHR_fragment_shader_barycentric (PhysicalDeviceFragmentShaderBarycentricFeaturesKHR)
  import Vulkan.Core10.Enums.StructureType (StructureType(STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADER_BARYCENTRIC_FEATURES_KHR))
  import Vulkan.Extensions.VK_KHR_fragment_shader_barycentric (PhysicalDeviceFragmentShaderBarycentricFeaturesKHR(..))
  -- No documentation found for TopLevel "VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADER_BARYCENTRIC_FEATURES_NV"
  pattern STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADER_BARYCENTRIC_FEATURES_NV = STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADER_BARYCENTRIC_FEATURES_KHR
  
  
  -- No documentation found for TopLevel "VkPhysicalDeviceFragmentShaderBarycentricFeaturesNV"
  type PhysicalDeviceFragmentShaderBarycentricFeaturesNV = PhysicalDeviceFragmentShaderBarycentricFeaturesKHR
  
  
  type NV_FRAGMENT_SHADER_BARYCENTRIC_SPEC_VERSION = 1
  
  -- No documentation found for TopLevel "VK_NV_FRAGMENT_SHADER_BARYCENTRIC_SPEC_VERSION"
  pattern NV_FRAGMENT_SHADER_BARYCENTRIC_SPEC_VERSION :: forall a . Integral a => a
  pattern NV_FRAGMENT_SHADER_BARYCENTRIC_SPEC_VERSION = 1
  
  
  type NV_FRAGMENT_SHADER_BARYCENTRIC_EXTENSION_NAME = "VK_NV_fragment_shader_barycentric"
  
  -- No documentation found for TopLevel "VK_NV_FRAGMENT_SHADER_BARYCENTRIC_EXTENSION_NAME"
  pattern NV_FRAGMENT_SHADER_BARYCENTRIC_EXTENSION_NAME :: forall a . (Eq a, IsString a) => a
  pattern NV_FRAGMENT_SHADER_BARYCENTRIC_EXTENSION_NAME = "VK_NV_fragment_shader_barycentric"
  
  