85 lines
3.2 KiB
Haskell
85 lines
3.2 KiB
Haskell
{-# LANGUAGE BangPatterns #-}
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module Render.Render where
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import qualified Data.ByteString as B
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import Foreign.Marshal.Array (withArray)
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import Foreign.Storable (sizeOf)
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import Graphics.Rendering.OpenGL.GL.BufferObjects
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import Graphics.Rendering.OpenGL.GL.Framebuffer (clearColor)
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import Graphics.Rendering.OpenGL.GL.ObjectName
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import Graphics.Rendering.OpenGL.GL.PerFragment
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import Graphics.Rendering.OpenGL.GL.Shaders
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import Graphics.Rendering.OpenGL.GL.StateVar
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import Graphics.Rendering.OpenGL.GL.VertexArrays (Capability (..),
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vertexAttribArray)
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import Graphics.Rendering.OpenGL.GL.VertexSpec
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import Graphics.Rendering.OpenGL.Raw.Core31
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import Render.Misc
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vertexShaderFile :: String
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vertexShaderFile = "shaders/vertex.shader"
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fragmentShaderFile :: String
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fragmentShaderFile = "shaders/fragment.shader"
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initBuffer :: [GLfloat] -> IO BufferObject
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initBuffer varray =
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let
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sizeOfVarray = length varray * sizeOfComponent
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sizeOfComponent = sizeOf (head varray)
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in do
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bufferObject <- genObjectName
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bindBuffer ArrayBuffer $= Just bufferObject
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withArray varray $ \buffer ->
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bufferData ArrayBuffer $= (fromIntegral sizeOfVarray, buffer, StaticDraw)
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checkError "initBuffer"
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return bufferObject
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initShader :: IO (AttribLocation, AttribLocation, AttribLocation, UniformLocation, UniformLocation, UniformLocation)
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initShader = do
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! vertexSource <- B.readFile vertexShaderFile
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! fragmentSource <- B.readFile fragmentShaderFile
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vertexShader <- compileShaderSource VertexShader vertexSource
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checkError "compile Vertex"
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fragmentShader <- compileShaderSource FragmentShader fragmentSource
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checkError "compile Frag"
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program <- createProgramUsing [vertexShader, fragmentShader]
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checkError "compile Program"
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currentProgram $= Just program
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projectionMatrixIndex <- get (uniformLocation program "fg_ProjectionMatrix")
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checkError "projMat"
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viewMatrixIndex <- get (uniformLocation program "fg_ViewMatrix")
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checkError "viewMat"
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modelMatrixIndex <- get (uniformLocation program "fg_ModelMatrix")
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checkError "modelMat"
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vertexIndex <- get (attribLocation program "fg_VertexIn")
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vertexAttribArray vertexIndex $= Enabled
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checkError "vertexInd"
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normalIndex <- get (attribLocation program "fg_NormalIn")
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vertexAttribArray normalIndex $= Enabled
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checkError "normalInd"
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colorIndex <- get (attribLocation program "fg_Color")
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vertexAttribArray colorIndex $= Enabled
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checkError "colorInd"
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att <- get (activeAttribs program)
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putStrLn $ unlines $ "Attributes: ":map show att
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putStrLn $ unlines $ ["Indices: ", show (colorIndex, normalIndex, vertexIndex)]
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checkError "initShader"
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return (colorIndex, normalIndex, vertexIndex, projectionMatrixIndex, viewMatrixIndex, modelMatrixIndex)
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initRendering :: IO ()
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initRendering = do
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clearColor $= Color4 0 0 0 0
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depthFunc $= Just Less
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glCullFace gl_BACK
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checkError "initRendering"
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