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