mirror of
https://github.com/italicsjenga/slang-shaders.git
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147 lines
3.7 KiB
Plaintext
147 lines
3.7 KiB
Plaintext
#version 450
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// An OSSC-like shader
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// By DariusG @May/2023
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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 OVERSCAN,ASPECTx,ASPECTy, LINES, L1, L2,L3,L4,L5,TATE, HYBRID;
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} params;
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#pragma parameter LINES "Lines" 4.0 2.0 5.0 1.0
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#define LINES params.LINES
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#pragma parameter TATE "TATE mode" 0.0 0.0 1.0 1.0
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#define TATE params.TATE
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#pragma parameter L1 "Line 1 Scanline Strength %" 0.25 0.0 1.0 0.01
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#define L1 params.L1
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#pragma parameter L2 "Line 2 Scanline Strength %" 0.0 0.0 1.0 0.01
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#define L2 params.L2
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#pragma parameter L3 "Line 3 Scanline Strength %" 0.0 0.0 1.0 0.01
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#define L3 params.L3
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#pragma parameter L4 "Line 4 Scanline Strength %" 0.4 0.0 1.0 0.01
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#define L4 params.L4
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#pragma parameter L5 "Line 5 Scanline Strength %" 0.5 0.0 1.0 0.01
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#define L5 params.L5
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#pragma parameter HYBRID "Scanline Hybrid Blend % (depend on pixel overlayed)" 0.0 0.0 1.0 0.01
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#define HYBRID params.HYBRID
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#pragma parameter OVERSCAN "Overscan" 0.0 0.0 1.0 1.0
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#define OVERSCAN params.OVERSCAN
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#pragma parameter something "--Set Retroarch Aspect to FULL--" 0.0 0.0 0.0 0.0
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#pragma parameter ASPECTx "Aspect Ratio X" 4.0 1.0 32.0 1.0
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#define ASPECTx params.ASPECTx
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#pragma parameter ASPECTy "Aspect Ratio Y" 3.0 1.0 32.0 1.0
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#define ASPECTy params.ASPECTy
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#define OutputSize params.OutputSize
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#define SourceSize params.SourceSize
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#define OriginalSize params.OriginalSize
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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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vec2 Overscan(vec2 pos, float dx, float dy){
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pos=pos*2.0-1.0;
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pos*=vec2(dx/(ASPECTx/ASPECTy/OutputSize.x*OutputSize.y),dy);
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return pos*0.5 + 0.5;
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}
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float scanline5(float y, float lm)
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{
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float l = 1.0/LINES;
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float m = fract(y*l);
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if (m<l) return 1.0-L1*(1.0-lm*HYBRID);
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else if (m<2.0*l) return 1.0-L2*(1.0-lm*HYBRID);
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else if (m<3.0*l) return 1.0-L3*(1.0-lm*HYBRID);
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else if (m<4.0*l) return 1.0-L4*(1.0-lm*HYBRID);
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else return 1.0-L5*(1.0-lm*HYBRID);
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}
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float scanline4(float y, float lm)
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{
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float l = 1.0/LINES;
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float m = fract(y*l);
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if (m<l) return 1.0-L1*(1.0-lm*HYBRID);
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else if (m<2.0*l) return 1.0-L2*(1.0-lm*HYBRID);
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else if (m<3.0*l) return 1.0-L3*(1.0-lm*HYBRID);
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else return 1.0-L4*(1.0-lm*HYBRID);
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}
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float scanline3(float y, float lm)
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{
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float l = 1.0/LINES;
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float m = fract(y*l);
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if (m<l) return 1.0-L1*(1.0-lm*HYBRID);
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else if (m<2.0*l) return 1.0-L2*(1.0-lm*HYBRID);
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else return 1.0-L3*(1.0-lm*HYBRID);
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}
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float scanline2(float y, float lm)
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{
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float l = 1.0/LINES;
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float m = fract(y*l);
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if (m<l) return 1.0-L1*(1.0-lm*HYBRID);
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else return 1.0-L2*(1.0-lm*HYBRID);
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}
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void main()
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{
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vec2 texcoord = vTexCoord.xy;
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vec2 ofactor = OutputSize.xy/OriginalSize.xy;
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vec2 intfactor;
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if (OVERSCAN == 0.0) intfactor = floor(ofactor); else intfactor = ceil(ofactor);
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vec2 diff = ofactor/intfactor;
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float scan = diff.y;
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texcoord = Overscan(texcoord, scan, scan);
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vec2 OGL2Pos = vTexCoord.xy*OutputSize.xy;
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if (TATE == 1.0) OGL2Pos = vec2(OGL2Pos.y,OGL2Pos.x);
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vec3 res = texture(Source, texcoord).rgb;
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vec3 lumweight = vec3 (0.2126,0.7152,0.0722);
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float lum = dot(res, lumweight);
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if (LINES == 5.0) {res *= scanline5(OGL2Pos.y, lum);}
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else if (LINES == 4.0){res *= scanline4(OGL2Pos.y,lum);}
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else if (LINES == 3.0){res *= scanline3(OGL2Pos.y,lum);}
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else if (LINES == 2.0){res *= scanline2(OGL2Pos.y,lum);}
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FragColor = vec4(res,1.0);
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}
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