Nerfed/Nerfed.Runtime/Graphics/StockShaders/Source/video_yuv2rgba.frag

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/*
* This effect is based on the YUV-to-RGBA GLSL shader found in SDL.
* Thus, it also released under the zlib license:
* http://libsdl.org/license.php
*/
#version 450
layout(location = 0) in vec2 TexCoord;
layout(location = 0) out vec4 FragColor;
layout(set = 2, binding = 0) uniform sampler2D YSampler;
layout(set = 2, binding = 1) uniform sampler2D USampler;
layout(set = 2, binding = 2) uniform sampler2D VSampler;
/* More info about colorspace conversion:
* http://www.equasys.de/colorconversion.html
* http://www.equasys.de/colorformat.html
*/
const vec3 offset = vec3(-0.0625, -0.5, -0.5);
const vec3 Rcoeff = vec3(1.164, 0.000, 1.793);
const vec3 Gcoeff = vec3(1.164, -0.213, -0.533);
const vec3 Bcoeff = vec3(1.164, 2.112, 0.000);
void main()
{
vec3 yuv;
yuv.x = texture(YSampler, TexCoord).r;
yuv.y = texture(USampler, TexCoord).r;
yuv.z = texture(VSampler, TexCoord).r;
yuv += offset;
FragColor.r = dot(yuv, Rcoeff);
FragColor.g = dot(yuv, Gcoeff);
FragColor.b = dot(yuv, Bcoeff);
FragColor.a = 1.0;
}