66 lines
1.7 KiB
Haskell
66 lines
1.7 KiB
Haskell
{-# LANGUAGE TypeFamilies #-}
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module Types.Sprite where
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import SDL (get, ($=))
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import qualified Graphics.Rendering.OpenGL as GL
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import qualified Graphics.GLUtil as GLU
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import Codec.Picture
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import Linear
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-- internal imports
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import Classes.Renderable
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data SpriteRenderObjects = SpriteRenderObjects
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{ roVAO :: GL.VertexArrayObject
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, roVBO :: GL.BufferObject
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}
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data SpriteShaderObjects = SpriteShaderObjects
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{ soProgram :: GLU.ShaderProgram
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}
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data Sprite = Sprite
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{ spritePosition :: V2 Int
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, spriteSize :: V2 Int
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}
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instance Renderable Sprite where
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type VertexObjects Sprite = SpriteRenderObjects
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type ShaderObjects Sprite = SpriteShaderObjects
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init
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(SpriteRenderObjects vao vbo)
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(SpriteShaderObjects prog)
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texture
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_ = do
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GL.currentProgram $= Just (GLU.program prog)
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GL.bindVertexArrayObject $= Just vao
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GL.activeTexture $= GL.TextureUnit 0
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GL.textureBinding GL.Texture2D $= Just texture
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GL.clearColor $= GL.Color4 1 1 1 1
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draw
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(SpriteRenderObjects vao vbo)
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(SpriteShaderObjects prog)
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(Sprite pos@(V2 px py) size) = do
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let (V2 sx sy) = fmap fromIntegral size
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model = fmap (fmap fromIntegral) $ V4
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(V4 sx 0 0 px)
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(V4 0 sy 0 py)
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(V4 0 0 1 0)
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(V4 0 0 0 1)
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:: M44 Float
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projection = ortho (-1920) 1920 (-1080) 1080 (-1) 1
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putStrLn $ show model
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GLU.setUniform prog "pm" (projection !*! model)
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GL.drawArrays GL.Triangles 0 6
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clean _ = do
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GL.currentProgram $= (Nothing :: Maybe GL.Program)
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GL.bindVertexArrayObject $= (Nothing :: Maybe GL.VertexArrayObject)
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GL.texture GL.Texture2D $= GL.Disabled
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