Difference between revisions of "Kung Fu Chaos"

Revision as of 14:52, 22 May 2017

Fullscreen blit shader

  v0.xy {
    {0,0}
    {0,1}
    {1,1}
    {1,0}
  }
  
  surfaceSize = {640,480}
  clipRange = {0,16777215}
  
  c[58] = { 320, -240, 16777215, 0 }
  c[59] = { 320.53125, 240.53125, 0, 0}
  
  c[100] = {  640,    480, 0, 5.06639553e-05}
  c[101] = {    0,      0, 0, 1}
  c[102] = {1/320, -1/240, 1, 1}
  c[103] = {    1,     -1, 0, 0}
  c[104] = {    0,      0, 0, 0}
  c[105] = { 320, -240, 16777215, 0 }
  c[106] = { 320.53125, 240.53125, 0, 0} 
  
  
  /* Slot 0: 0x00000000 0x002D001B 0x0C36106C 0x28200FF8 */
  
  // R2.x = 0.0;
  MOV(R2,x, c[104]);
  
  /* Slot 1: 0x00000000 0x002CC01B 0x0C36106C 0x2F900FF8 */
  
  //   R9 = {1/320, -1/240, 1, 1}
  MOV(R9,xyzw, c[102]);
  
  /* Slot 2: 0x00000000 0x024CE200 0x2636186C 0x2C50F81C */
  
  // R5.xy = R2.x * { -1, +1 }  // -> R5.xy = 0.0 .. FIXME: This makes no sense? R2.x was just set to zero?! [from C104.x !!]
  // oD0 = v1
  
  MUL(R5,xy, R2.x, -c[103]);
  MOV(oD0,xyzw, v1);
  
    /* Slot 3: 0x00000000 0x006CC0AA 0x0C36146C 0x98300FF8 */
    ADD(R3,x, c[102].z, -R2);  // -> R3.x = C[102].z = 1.0
  
    /* Slot 4: 0x00000000 0x008CC000 0x242A1800 0xDC400FF8 */
    MAD(R4,xy, R2.x, c[102].xy, R3.x); // -> R4.xy = R3.xx = {1,1}
  
    /* Slot 5: 0x00000000 0x008D2000 0x242A1800 0xDC600FF8 */
    MAD(R6,xy, R2.x, c[105].xy, R3.x); // -> R6.xy = R3.xx = {1,1}
  
    /* Slot 6: 0x00000000 0x004D4000 0x242A186C 0x2C700FF8 */
    MUL(R7,xy, R2.x, c[106].xy); // -> R7.xy = 0.0
  
    /* Slot 7: 0x00000000 0x0080041B 0x0836886D 0x5C800FF8 */
    MAD(R8,xy, v2, R4, R5); // -> R8 = v2 * R4 = v2
  
    oT0.xy = R8 * R6 + R7 // -> v2
    oT1.xy = R8 * R6 + R7 // -> v2
  
    /* Slot 8: 0x00000000 0x004CA01A 0x0C37286C 0x2FA00FF8 */
    MUL(R10,xyzw, c[101].xyz, R9);
  
    /* Slot 11: 0x00000000 0x006CE01B 0xA436146C 0x3070F800 */
    ADD(oPos,xyzw, R10, -c[103]);
  
    /* Slot 12: 0x00000000 0x004C8015 0x942A186C 0x2CB00FF8 */
    MUL(R11,xy, R9.xy, c[100].xy);
  
    /* Slot 13: 0x00000000 0x00800015 0x082B6857 0x1070C800 */
    MAD(oPos,xy, v0.xy, R11.xy, R12.xy);
  
  
  SET FOG:
  
  
    /* Slot 14: 0x00000000 0x004C80FF 0x0DFF886C 0x20708828 */
    MUL(oFog,x, c[100].w, R12.w);
  
  
  
  DO VIEWPORT TRANSFORM:
  
  
    /* Slot 15: 0x00000000 0x0047401B 0xC436186C 0x2070C800 */
    MUL(oPos,xy, R12, c[58]);
  
    /* Slot 16: 0x00000000 0x0067601B 0xC436106C 0x3070C801 */
    ADD(oPos,xy, R12, c[59]);
  
  
  
  SPACE CONVERSION [XQEMU only]:
  
  
    if (oPos.w == 0.0 || isinf(oPos.w)) {
      vtx.inv_w = 1.0;
    } else {
      vtx.inv_w = 1.0 / oPos.w;
    }
    oPos.x = 2.0 * (oPos.x - surfaceSize.x * 0.5) / surfaceSize.x;
    oPos.y = -2.0 * (oPos.y - surfaceSize.y * 0.5) / surfaceSize.y;
    if (clipRange.y != clipRange.x) {
      oPos.z = (oPos.z - 0.5 * (clipRange.x + clipRange.y)) / (0.5 * (clipRange.y - clipRange.x));
    }
    if (oPos.w <= 0.0) {
      oPos.xyz *= oPos.w;
    } else {
      oPos.w = 1.0;
    }
  
  
  /* Make the world a happy place! */
  #if 1
  
  oFog.xyzw = vec4(1.0);
  
  oPos.xy = v0.xy;
  oPos.y *= -1.0;
  oPos.z = 0.5;
  oPos.w = 1.0;
  vtx.inv_w = 1.0;
  
  #endif