Implement the Rec. 709 gamma curve.

[movit] / gamma_compression_effect_srgb.glsl

diff --git a/gamma_compression_effect_srgb.glsl b/gamma_compression_effect_srgb.glsl
index 2d53e08a58833ba8802fcd42c6e2d1093dcb3368..e65d6bb8dc4c68fea9c441fc1fc607869794ddfd 100644 (file)
--- a/gamma_compression_effect_srgb.glsl
+++ b/gamma_compression_effect_srgb.glsl
@@ -3,14 +3,14 @@
 #if 0
 
 // if we have the lut
-uniform sampler1D PREFIX(srgb_tex);
+uniform sampler1D PREFIX(srgb_inverse_tex);
 
 vec4 FUNCNAME(vec2 tc) {
        vec4 x = LAST_INPUT(tc);
 
-       x.r = texture1D(PREFIX(srgb_tex), x.r).x;
-       x.g = texture1D(PREFIX(srgb_tex), x.g).x;
-       x.b = texture1D(PREFIX(srgb_tex), x.b).x;
+       x.r = texture1D(PREFIX(srgb_inverse_tex), x.r).x;
+       x.g = texture1D(PREFIX(srgb_inverse_tex), x.g).x;
+       x.b = texture1D(PREFIX(srgb_inverse_tex), x.b).x;
 
        return x;
 }