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https://github.com/italicsjenga/slang-shaders.git
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45 lines
912 B
Plaintext
45 lines
912 B
Plaintext
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#version 450
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/*
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Anime4k - Luma shader - ported by Hyllian - 2020
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*/
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layout(push_constant) uniform Push
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{
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vec4 SourceSize;
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vec4 OriginalSize;
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vec4 OutputSize;
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uint FrameCount;
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} params;
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layout(std140, set = 0, binding = 0) uniform UBO
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{
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mat4 MVP;
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} global;
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#pragma stage vertex
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layout(location = 0) in vec4 Position;
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layout(location = 1) in vec2 TexCoord;
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layout(location = 0) out vec2 vTexCoord;
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void main()
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{
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gl_Position = global.MVP * Position;
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vTexCoord = TexCoord;
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}
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#pragma stage fragment
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layout(location = 0) in vec2 vTexCoord;
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layout(location = 0) out vec4 FragColor;
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layout(set = 0, binding = 2) uniform sampler2D Source;
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void main()
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{
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vec4 c0 = texture(Source, vTexCoord);
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//Quick luminance approximation
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float lum = (c0.r + c0[0].r + c0.g + c0.g + c0.g + c0.b) / 6;
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//Computes the luminance and saves it in the unused alpha channel
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FragColor = vec4(c0.r, c0.g, c0.b, lum);
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}
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