42 lines
921 B
Haskell
42 lines
921 B
Haskell
module Renderer where
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import SDL (($=))
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import qualified Graphics.Rendering.OpenGL as GL
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import Foreign
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initSpriteRenderData = do
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quadVAO <- GL.genObjectName
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quadVBO <- GL.genObjectName
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GL.bindBuffer GL.ArrayBuffer $= Just quadVBO
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withArray rawVertices $ \ptr ->
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GL.bufferData GL.ArrayBuffer $=
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( fromIntegral $ length rawVertices * sizeOf (0 :: Float)
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, ptr
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, GL.StaticDraw
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)
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GL.bindVertexArrayObject $= Just quadVAO
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GL.vertexAttribArray (GL.AttribLocation 0) $= GL.Enabled
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GL.vertexAttribPointer (GL.AttribLocation 0) $=
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( GL.ToFloat
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, GL.VertexArrayDescriptor 4 GL.Float 0 (plusPtr nullPtr 0)
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)
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GL.bindBuffer GL.ArrayBuffer $= Nothing
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GL.bindVertexArrayObject $= Nothing
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where
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rawVertices :: [Float]
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rawVertices =
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[ 0, 1, 0, 0
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, 1, 0, 1, 0
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, 0, 0, 0, 0
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, 0, 1, 0, 1
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, 1, 1, 1, 1
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, 1, 0, 1, 0
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]
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