mirror of https://github.com/bsnes-emu/bsnes.git
78 lines
2.0 KiB
Forth
78 lines
2.0 KiB
Forth
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#version 150
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////////////////////////////////////////////////////////
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// GTU version 0.40
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// Author: aliaspider - aliaspider@gmail.com
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// License: GPLv3
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////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////
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// SETTINGS
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////////////////////////////////////////////////////////
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//#define CROP_OVERSCAN
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#define TV_COLOR_LEVELS
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//#define COMPOSITE_CONNECTION
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//#define NO_SCANLINES
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#define TV_HORIZONTAL_RESOLUTION 400.0
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#define TV_VERTICAL_RESOLUTION 300.0
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#define SIGNAL_RESOLUTION 280.0
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#define SIGNAL_RESOLUTION_I 83.0
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#define SIGNAL_RESOLUTION_Q 25.0
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#define TV_DISPLAY_GAMMA 2.4
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#define OUTPUT_DISPLAY_GAMMA 2.2
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////////////////////////////////////////////////////////
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//
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////////////////////////////////////////////////////////
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#define SCANLINE_WIDTH (1.5*sourceSize[0].y/TV_VERTICAL_RESOLUTION)
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uniform sampler2D source[];
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uniform sampler2D texture[];
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uniform vec4 sourceSize[];
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in Vertex {
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vec2 texCoord;
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};
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out vec4 fragColor;
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#define GAMMAOUT(c0) (pow(c0, vec3(1.0/OUTPUTG2)))
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#define pi 3.14159265358
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#define GAUSS(x,w) ((sqrt(2.0) / (w)) * (exp((-2.0 * pi * (x) * (x)) / ((w) * (w)))))
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#define Y(j) (offset.y-(j))
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#define a(x) abs(x)
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#define d(x,b) (pi*b*min(a(x)+0.5,1.0/b))
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#define e(x,b) (pi*b*min(max(a(x)-0.5,-1.0/b),1.0/b))
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#define STU(x,b) ((d(x,b)+sin(d(x,b))-e(x,b)-sin(e(x,b)))/(2.0*pi))
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#define SOURCE(j) vec2(texCoord.x,texCoord.y - Y(j)*sourceSize[0].w)
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#define C(j) (texture2D(source[0], SOURCE(j)).xyz)
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#ifdef NO_SCANLINES
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#define VAL(j) (C(j)*STU(Y(j),(TV_VERTICAL_RESOLUTION*sourceSize[0].w)))
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#else
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#define VAL(j) (C(j)*GAUSS(Y(j),SCANLINE_WIDTH))
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#endif
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void main() {
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vec2 offset = fract((texCoord.xy * sourceSize[0].xy) - 0.5);
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vec3 tempColor = vec3(0.0);
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tempColor+=VAL(-3.0);
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tempColor+=VAL(-2.0);
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tempColor+=VAL(-1.0);
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tempColor+=VAL(0.0);
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tempColor+=VAL(1.0);
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tempColor+=VAL(2.0);
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tempColor+=VAL(3.0);
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tempColor+=VAL(4.0);
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fragColor = vec4(pow(tempColor,vec3(1.0/OUTPUT_DISPLAY_GAMMA)), 1.0);
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}
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