91 lines
2.2 KiB
Haskell
91 lines
2.2 KiB
Haskell
{-# LANGUAGE TemplateHaskell #-}
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{-# LANGUAGE StrictData #-}
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{- | Datatypes used to setup and pass data to shaders. -}
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module Shader.Data
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( VAO (..)
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, VBO (..)
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, EBO (..)
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-- , FullShader (..)
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, FullShader (..)
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, ShaderTexture (..)
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, EPrimitiveMode (..)
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-- | Lens functions
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, vaoName
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, vaoVBO
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, vboName
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, vboPtr
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, vboAttribSizes
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, vboStride
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, eboName
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, eboPtr
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, shadProg'
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, shadVAO'
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, shadPrim'
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, shadTex'
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, shadUnis'
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-- | Synonyms
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, vert'
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, geom'
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, frag'
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) where
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import Data.Vector (Vector)
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import Graphics.GL.Core45
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import Foreign
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import Control.Lens
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{- | Datatype containing the necessary information for a single shader. -}
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data FullShader = FullShader
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{ _shadProg' :: GLuint -- should be shaderID
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, _shadVAO' :: VAO
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, _shadPrim' :: EPrimitiveMode
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, _shadTex' :: Maybe ShaderTexture
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, _shadUnis' :: Vector GLint
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}
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{- | Vertex array object: contains the reference to the object,
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and its buffer targets. -}
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data VAO = VAO
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{ _vaoName :: GLuint
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, _vaoVBO :: VBO
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}
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{- | Vertex buffer object: contains the reference to the object,
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a pointer to a location with space that can be written to the buffer,
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and a list of attribute pointer sizes.
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Vertex attributes are interleaved within the vbo. -}
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data VBO = VBO
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{ _vboName :: GLuint
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, _vboPtr :: Ptr Float
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, _vboAttribSizes :: [Int] -- ^ It is not clear to me if this is necessary to store or not
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, _vboStride :: Int
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}
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data EBO = EBO
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{ _eboName :: GLuint
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, _eboPtr :: Ptr GLushort
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}
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{- | Datatype containing the reference to a texture object. -}
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newtype ShaderTexture = ShaderTexture
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{ _textureObject :: GLuint -- DSA style texture, 450
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-- , _textureTarget :: GLenum
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}
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data EPrimitiveMode
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= EPoints
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| ELines
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| ELinesAdjacency
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| ELineLoop
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| ELineStrip
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| ETriangles
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| ETriangleStrip
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| ETriangleFan
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| EQuads
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| EQuadStrip
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| EPolygon
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| EPatches
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-- | Short synonyms for shader types
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vert', geom', frag' :: GLenum
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vert' = GL_VERTEX_SHADER
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geom' = GL_GEOMETRY_SHADER
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frag' = GL_FRAGMENT_SHADER
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makeLenses ''VAO
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makeLenses ''VBO
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makeLenses ''FullShader
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makeLenses ''EBO
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