diff options
Diffstat (limited to 'luma.glsl')
| -rw-r--r-- | luma.glsl | 27 |
1 files changed, 21 insertions, 6 deletions
@@ -1,5 +1,5 @@ /* - * Copyright (C) 2023 Mikhail Burakov. This file is part of streamer. + * Copyright (C) 2024 Mikhail Burakov. This file is part of streamer. * * streamer is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -16,14 +16,29 @@ */ uniform sampler2D img_input; -uniform mediump mat3 colorspace; -uniform mediump vec3 ranges[2]; - varying mediump vec2 texcoord; +const mediump mat3 kColorSpace = mat3( + 0.299, 0.587, 0.114, + -0.168736, -0.331264, 0.5, + 0.5, -0.418688, -0.081312 +); + +const mediump vec3 kColorRangeBase = vec3( + 16.0 / 255.0, + 16.0 / 255.0, + 16.0 / 255.0 +); + +const mediump vec3 kColorRangeScale = vec3( + (235.0 - 16.0) / 255.0, + (240.0 - 16.0) / 255.0, + (240.0 - 16.0) / 255.0 +); + mediump vec3 rgb2yuv(in mediump vec3 rgb) { - mediump vec3 yuv = colorspace * rgb.rgb + vec3(0.0, 0.5, 0.5); - return ranges[0] + yuv * ranges[1]; + mediump vec3 yuv = kColorSpace * rgb.rgb + vec3(0.0, 0.5, 0.5); + return kColorRangeBase + yuv * kColorRangeScale; } void main() { |