mirror of
https://github.com/italicsjenga/slang-shaders.git
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82 lines
2.3 KiB
Plaintext
82 lines
2.3 KiB
Plaintext
#version 450
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/*
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by Rere
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license: public domain
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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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float thickness;
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float glow;
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float sGamma;
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float tGamma;
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float highlights;
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float boost;
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} params;
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#pragma parameter thickness "Scanline thickness" 0.50 0.00 1.00 0.01
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#pragma parameter glow "Scanline glow" 0.75 0.00 1.00 0.01
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#pragma parameter highlights "Scanline highlights" 0.75 0.00 1.00 0.01
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#pragma parameter boost "Luminance boost" 0.25 0.00 1.00 0.01
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#pragma parameter sGamma "Source gamma" 2.40 1.00 3.00 0.01
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#pragma parameter tGamma "Target gamma" 2.20 1.00 3.00 0.01
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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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#define pi 3.141592654
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#define luminance(c) (0.2126 * c.r + 0.7152 * c.g + 0.0722 * c.b)
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vec3 gammaFn(vec3 c, float gamma) {
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return vec3(pow(c.x, gamma), pow(c.y, gamma), pow(c.z, gamma));
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}
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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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layout(location = 1) out float thickness;
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layout(location = 2) out float glow;
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layout(location = 3) out float highlights;
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layout(location = 4) out float boost;
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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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thickness = 0.5 + mix(0.0, 2.0, params.thickness);
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glow = mix(-0.5, 0.5, params.glow);
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highlights = mix(0.0, 1.0, params.highlights);
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boost = mix(0.0, 5.0, params.boost);
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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 = 1) in float thickness;
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layout(location = 2) in float glow;
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layout(location = 3) in float highlights;
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layout(location = 4) in float boost;
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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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vec2 uv = vTexCoord.xy;
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vec3 col = texture(Source, uv).rgb;
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col = gammaFn(col, params.sGamma);
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float L = luminance(col);
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float y = fract(uv.y * params.SourceSize.y * 1.0);
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y = pow(sin(y * pi), thickness);
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y = (y + glow) / (1.0 + glow);
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float g = 1.0 + L * (1.0 - L) * boost;
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col = mix(col, col * g * y, 1.0 - L * highlights);
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FragColor = vec4(gammaFn(col, 1.0 / params.tGamma), 1.0);
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}
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