blob: 1a17118cccc04eb3a40247fc9e2db390ab8c1eb3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
clear = FrameBuffer $ ColorImage @1 $ V4 1 0 0 0.5
triangleRasterCtx = TriangleCtx CullNone PolygonFill NoOffset LastVertex
colorFragmentCtx = accumulationContext (ColorOp NoBlending (V4 True True True True))
rasterizeWith = rasterizePrimitives
triangles = triangleRasterCtx
quadVertexStream = fetch "quad" Triangle (Attribute "position" :: Vec 4 Float)
transform s f = mapPrimitives (\v -> f v) s
mapFragments2 s fs = accumulate colorFragmentCtx ( \a -> fs a) s clear
render f = quadVertexStream -- id vertices
`transform` id
& rasterizeWith triangles () -- rasterize
`mapFragments2` f
& ScreenOut -- draw into screen
main = render $ const blue
|
