mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-10-11 14:03:23 -05:00
148 lines
3.9 KiB
Plaintext
148 lines
3.9 KiB
Plaintext
/* COMPATIBILITY
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- HLSL compilers
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- Cg compilers
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*/
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#ifdef GL_ES
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precision mediump float;
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precision mediump int;
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#endif
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const vec3 dtt = vec3(65536,255,1);
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float reduce(vec3 color)
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{
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return dot(color, dtt);
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}
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struct inputdata
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{
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vec2 video_size;
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vec2 texture_size;
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vec2 output_size;
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float frame_count;
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float frame_direction;
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float frame_rotation;
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};
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uniform sampler2D Sample;
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uniform inputdata IN;
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varying vec4 TexCoord[8];
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varying vec2 v_texCoord;
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/* GET_RESULT function */
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/* Copyright (c) 1999-2001 by Derek Liauw Kie Fa */
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/* License: GNU-GPL */
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int GET_RESULT(float A, float B, float C, float D)
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{
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int x = 0; int y = 0; int r = 0;
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if (A == C) x+=1; else if (B == C) y+=1;
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if (A == D) x+=1; else if (B == D) y+=1;
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if (x <= 1) r+=1;
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if (y <= 1) r-=1;
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return r;
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}
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void main()
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{
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vec2 fp = fract(v_texCoord*IN.texture_size);
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// Reading the texels
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vec3 C0 = texture2D(Sample,TexCoord[0].xy).xyz;
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vec3 C1 = texture2D(Sample,TexCoord[0].zw).xyz;
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vec3 C2 = texture2D(Sample,TexCoord[1].xy).xyz;
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vec3 D3 = texture2D(Sample,TexCoord[1].zw).xyz;
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vec3 C3 = texture2D(Sample,TexCoord[2].xy).xyz;
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vec3 C4 = texture2D(Sample,v_texCoord).xyz;
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vec3 C5 = texture2D(Sample,TexCoord[2].zw).xyz;
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vec3 D4 = texture2D(Sample,TexCoord[3].xy).xyz;
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vec3 C6 = texture2D(Sample,TexCoord[3].zw).xyz;
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vec3 C7 = texture2D(Sample,TexCoord[4].xy).xyz;
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vec3 C8 = texture2D(Sample,TexCoord[4].zw).xyz;
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vec3 D5 = texture2D(Sample,TexCoord[5].xy).xyz;
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vec3 D0 = texture2D(Sample,TexCoord[5].zw).xyz;
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vec3 D1 = texture2D(Sample,TexCoord[6].xy).xyz;
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vec3 D2 = texture2D(Sample,TexCoord[6].zw).xyz;
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vec3 D6 = texture2D(Sample,TexCoord[7].xy).xyz;
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vec3 p00,p10,p01,p11;
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// reducing vec3 to float
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float c0 = reduce(C0);float c1 = reduce(C1);
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float c2 = reduce(C2);float c3 = reduce(C3);
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float c4 = reduce(C4);float c5 = reduce(C5);
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float c6 = reduce(C6);float c7 = reduce(C7);
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float c8 = reduce(C8);float d0 = reduce(D0);
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float d1 = reduce(D1);float d2 = reduce(D2);
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float d3 = reduce(D3);float d4 = reduce(D4);
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float d5 = reduce(D5);float d6 = reduce(D6);
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/* SuperEagle code */
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/* Copied from the Dosbox source code */
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/* Copyright (C) 2002-2007 The DOSBox Team */
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/* License: GNU-GPL */
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/* Adapted by guest(r) on 16.4.2007 */
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if (c4 != c8) {
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if (c7 == c5) {
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p01 = p10 = C7;
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if ((c6 == c7) || (c5 == c2)) {
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p00 = 0.25*(3.0*C7+C4);
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} else {
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p00 = 0.5*(C4+C5);
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}
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if ((c5 == d4) || (c7 == d1)) {
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p11 = 0.25*(3.0*C7+C8);
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} else {
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p11 = 0.5*(C7+C8);
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}
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} else {
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p11 = 0.125*(6.0*C8+C7+C5);
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p00 = 0.125*(6.0*C4+C7+C5);
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p10 = 0.125*(6.0*C7+C4+C8);
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p01 = 0.125*(6.0*C5+C4+C8);
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}
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} else {
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if (c7 != c5) {
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p11 = p00 = C4;
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if ((c1 == c4) || (c8 == d5)) {
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p01 = 0.25*(3.0*C4+C5);
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} else {
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p01 = 0.5*(C4+C5);
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}
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if ((c8 == d2) || (c3 == c4)) {
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p10 = 0.25*(3.0*C4+C7);
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} else {
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p10 = 0.5*(C7+C8);
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}
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} else {
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int r = 0;
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r += GET_RESULT(c5,c4,c6,d1);
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r += GET_RESULT(c5,c4,c3,c1);
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r += GET_RESULT(c5,c4,d2,d5);
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r += GET_RESULT(c5,c4,c2,d4);
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if (r > 0) {
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p01 = p10 = C7;
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p00 = p11 = 0.5*(C4+C5);
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} else if (r < 0) {
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p11 = p00 = C4;
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p01 = p10 = 0.5*(C4+C5);
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} else {
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p11 = p00 = C4;
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p01 = p10 = C7;
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}
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}
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}
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// Distributing the four products
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p10 = (fp.x < 0.50) ? (fp.y < 0.50 ? p00 : p10) : (fp.y < 0.50 ? p01: p11);
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// OUTPUT
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gl_FragColor = vec4(p10, 1);
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}
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