content: {-# language CPP #-}
  -- | = Name
  --
  -- VK_KHR_shader_draw_parameters - device extension
  --
  -- == VK_KHR_shader_draw_parameters
  --
  -- [__Name String__]
  --     @VK_KHR_shader_draw_parameters@
  --
  -- [__Extension Type__]
  --     Device extension
  --
  -- [__Registered Extension Number__]
  --     64
  --
  -- [__Revision__]
  --     1
  --
  -- [__Ratification Status__]
  --     Ratified
  --
  -- [__Extension and Version Dependencies__]
  --     None
  --
  -- [__SPIR-V Dependencies__]
  --
  --     -   <https://htmlpreview.github.io/?https://github.com/KhronosGroup/SPIRV-Registry/blob/master/extensions/KHR/SPV_KHR_shader_draw_parameters.html SPV_KHR_shader_draw_parameters>
  --
  -- [__Deprecation State__]
  --
  --     -   /Promoted/ to
  --         <https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#versions-1.1-promotions Vulkan 1.1>
  --
  -- [__Contact__]
  --
  --     -   Daniel Koch
  --         <https://github.com/KhronosGroup/Vulkan-Docs/issues/new?body=[VK_KHR_shader_draw_parameters] @dgkoch%0A*Here describe the issue or question you have about the VK_KHR_shader_draw_parameters extension* >
  --
  -- == Other Extension Metadata
  --
  -- [__Last Modified Date__]
  --     2017-09-05
  --
  -- [__IP Status__]
  --     No known IP claims.
  --
  -- [__Interactions and External Dependencies__]
  --
  --     -   This extension provides API support for
  --         <https://registry.khronos.org/OpenGL/extensions/ARB/ARB_shader_draw_parameters.txt GL_ARB_shader_draw_parameters>
  --
  -- [__Contributors__]
  --
  --     -   Daniel Koch, NVIDIA Corporation
  --
  --     -   Jeff Bolz, NVIDIA
  --
  --     -   Daniel Rakos, AMD
  --
  --     -   Jan-Harald Fredriksen, ARM
  --
  --     -   John Kessenich, Google
  --
  --     -   Stuart Smith, IMG
  --
  -- == Description
  --
  -- This extension adds support for the following SPIR-V extension in
  -- Vulkan:
  --
  -- -   @SPV_KHR_shader_draw_parameters@
  --
  -- The extension provides access to three additional built-in shader
  -- variables in Vulkan:
  --
  -- -   @BaseInstance@, containing the @firstInstance@ parameter passed to
  --     drawing commands,
  --
  -- -   @BaseVertex@, containing the @firstVertex@ or @vertexOffset@
  --     parameter passed to drawing commands, and
  --
  -- -   @DrawIndex@, containing the index of the draw call currently being
  --     processed from an indirect drawing call.
  --
  -- When using GLSL source-based shader languages, the following variables
  -- from @GL_ARB_shader_draw_parameters@ can map to these SPIR-V built-in
  -- decorations:
  --
  -- -   @in int gl_BaseInstanceARB;@ → @BaseInstance@,
  --
  -- -   @in int gl_BaseVertexARB;@ → @BaseVertex@, and
  --
  -- -   @in int gl_DrawIDARB;@ → @DrawIndex@.
  --
  -- == Promotion to Vulkan 1.1
  --
  -- All functionality in this extension is included in core Vulkan 1.1.
  -- However, the
  -- <https://registry.khronos.org/vulkan/specs/1.3-extensions/html/vkspec.html#features-shaderDrawParameters shaderDrawParameters>
  -- feature bit was added to distinguish whether it is actually available or
  -- not.
  --
  -- == New Enum Constants
  --
  -- -   'KHR_SHADER_DRAW_PARAMETERS_EXTENSION_NAME'
  --
  -- -   'KHR_SHADER_DRAW_PARAMETERS_SPEC_VERSION'
  --
  -- == New Built-In Variables
  --
  -- -   <https://registry.khronos.org/vulkan/specs/1.3-extensions/html/vkspec.html#interfaces-builtin-variables-baseinstance BaseInstance>
  --
  -- -   <https://registry.khronos.org/vulkan/specs/1.3-extensions/html/vkspec.html#interfaces-builtin-variables-basevertex BaseVertex>
  --
  -- -   <https://registry.khronos.org/vulkan/specs/1.3-extensions/html/vkspec.html#interfaces-builtin-variables-drawindex DrawIndex>
  --
  -- == New SPIR-V Capabilities
  --
  -- -   <https://registry.khronos.org/vulkan/specs/1.3-extensions/html/vkspec.html#spirvenv-capabilities-table-DrawParameters DrawParameters>
  --
  -- == Issues
  --
  -- 1) Is this the same functionality as @GL_ARB_shader_draw_parameters@?
  --
  -- __RESOLVED__: It is actually a superset, as it also adds in support for
  -- arrayed drawing commands.
  --
  -- In GL for @GL_ARB_shader_draw_parameters@, @gl_BaseVertexARB@ holds the
  -- integer value passed to the parameter to the command that resulted in
  -- the current shader invocation. In the case where the command has no
  -- @baseVertex@ parameter, the value of @gl_BaseVertexARB@ is zero. This
  -- means that @gl_BaseVertexARB@ = @baseVertex@ (for @glDrawElements@
  -- commands with @baseVertex@) or 0. In particular there are no
  -- @glDrawArrays@ commands that take a @baseVertex@ parameter.
  --
  -- Now in Vulkan, we have @BaseVertex@ = @vertexOffset@ (for indexed
  -- drawing commands) or @firstVertex@ (for arrayed drawing commands), and
  -- so Vulkan’s version is really a superset of GL functionality.
  --
  -- == Version History
  --
  -- -   Revision 1, 2016-10-05 (Daniel Koch)
  --
  --     -   Internal revisions
  --
  -- == See Also
  --
  -- No cross-references are available
  --
  -- == Document Notes
  --
  -- For more information, see the
  -- <https://registry.khronos.org/vulkan/specs/1.3-extensions/html/vkspec.html#VK_KHR_shader_draw_parameters Vulkan Specification>
  --
  -- This page is a generated document. Fixes and changes should be made to
  -- the generator scripts, not directly.
  module Vulkan.Extensions.VK_KHR_shader_draw_parameters  ( KHR_SHADER_DRAW_PARAMETERS_SPEC_VERSION
                                                          , pattern KHR_SHADER_DRAW_PARAMETERS_SPEC_VERSION
                                                          , KHR_SHADER_DRAW_PARAMETERS_EXTENSION_NAME
                                                          , pattern KHR_SHADER_DRAW_PARAMETERS_EXTENSION_NAME
                                                          ) where
  
  import Data.String (IsString)
  
  type KHR_SHADER_DRAW_PARAMETERS_SPEC_VERSION = 1
  
  -- No documentation found for TopLevel "VK_KHR_SHADER_DRAW_PARAMETERS_SPEC_VERSION"
  pattern KHR_SHADER_DRAW_PARAMETERS_SPEC_VERSION :: forall a . Integral a => a
  pattern KHR_SHADER_DRAW_PARAMETERS_SPEC_VERSION = 1
  
  
  type KHR_SHADER_DRAW_PARAMETERS_EXTENSION_NAME = "VK_KHR_shader_draw_parameters"
  
  -- No documentation found for TopLevel "VK_KHR_SHADER_DRAW_PARAMETERS_EXTENSION_NAME"
  pattern KHR_SHADER_DRAW_PARAMETERS_EXTENSION_NAME :: forall a . (Eq a, IsString a) => a
  pattern KHR_SHADER_DRAW_PARAMETERS_EXTENSION_NAME = "VK_KHR_shader_draw_parameters"
  
  