{-# OPTIONS_HADDOCK hide #-}

module Brillo.Internals.Rendering.Color where

import Brillo.Internals.Data.Color (Color (..))
import Graphics.Rendering.OpenGL.GL qualified as GL
import Unsafe.Coerce (unsafeCoerce)


-- | Convert one of our Colors to OpenGL's representation.
glColor4OfColor :: Color -> GL.Color4 a
glColor4OfColor :: forall a. Color -> Color4 a
glColor4OfColor Color
color =
  case Color
color of
    RGBA Float
r Float
g Float
b Float
a ->
      let rF :: b
rF = Float -> b
forall a b. a -> b
unsafeCoerce Float
r
          gF :: b
gF = Float -> b
forall a b. a -> b
unsafeCoerce Float
g
          bF :: b
bF = Float -> b
forall a b. a -> b
unsafeCoerce Float
b
          aF :: b
aF = Float -> b
forall a b. a -> b
unsafeCoerce Float
a
      in  a -> a -> a -> a -> Color4 a
forall a. a -> a -> a -> a -> Color4 a
GL.Color4 a
forall {b}. b
rF a
forall {b}. b
gF a
forall {b}. b
bF a
forall {b}. b
aF
{-# INLINE glColor4OfColor #-}