diff options
Diffstat (limited to 'video/out/gl_video_shaders.glsl')
| -rw-r--r-- | video/out/gl_video_shaders.glsl | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/video/out/gl_video_shaders.glsl b/video/out/gl_video_shaders.glsl index bb6530295f..ff2a019b30 100644 --- a/video/out/gl_video_shaders.glsl +++ b/video/out/gl_video_shaders.glsl @@ -43,6 +43,12 @@ // Earlier GLSL doesn't support mix() with bvec #if __VERSION__ >= 130 +vec3 srgb_expand(vec3 v) +{ + return mix(v / 12.92, pow((v + vec3(0.055))/1.055, vec3(2.4)), + lessThanEqual(vec3(0.04045), v)); +} + vec3 srgb_compand(vec3 v) { return mix(v * 12.92, 1.055 * pow(v, vec3(1.0/2.4)) - 0.055, @@ -98,6 +104,9 @@ void main() { #ifdef USE_OSD_LINEAR_CONV_BT2020 color.rgb = bt2020_expand(color.rgb); #endif +#ifdef USE_OSD_LINEAR_CONV_SRGB + color.rgb = srgb_expand(color.rgb); +#endif #ifdef USE_OSD_CMS_MATRIX // Convert to the right target gamut first (to BT.709 for sRGB, // and to BT.2020 for 3DLUT). Normal clamping here as perceptually @@ -439,6 +448,13 @@ void main() { // ... and actual BT.2020 (two-part function) color = bt2020_expand(color); #endif +#ifdef USE_LINEAR_LIGHT_SRGB + // This is not needed for most sRGB content since we can use GL_SRGB to + // directly sample RGB texture in linear light, but for things which are + // also sRGB but in a different format (such as JPEG's YUV), we need + // to convert to linear light manually. + color = srgb_expand(color); +#endif #ifdef USE_CONST_LUMA // Calculate the green channel from the expanded RYcB // The BT.2020 specification says Yc = 0.2627*R + 0.6780*G + 0.0593*B |