osCapConvertToI8_PaintStudio

/* From Mario Artist Paint Studio */
void osCapConvertToI8(byte *capture,byte *dest)

{
  int calc;
  byte *pbVar1;
  int y;
  byte *pbVar2;
  int x;
  byte intensity;

  capture = capture + 0x4468;
  y = 0xd0;
  do {
    x = 0xc0;
    pbVar1 = dest;
    pbVar2 = capture;
    do {
      calc = (uint)*pbVar2 + ((int)(uint)*pbVar2 >> 2) +
             (uint)pbVar2[1] + ((int)(uint)pbVar2[1] >> 2) +
             (uint)pbVar2[2] + ((int)(uint)pbVar2[2] >> 2) +
             (uint)pbVar2[3] + ((int)(uint)pbVar2[3] >> 2) + -0x82;
      if (calc < 0) {
        calc = 0;
      }
      intensity = (byte)((uint)calc >> 2);
      if (0xff < (uint)calc >> 2) {
        intensity = 0xff;
      }
      x = x + -1;
      *pbVar1 = intensity;
      pbVar2 = pbVar2 + 4;
      pbVar1 = pbVar1 + 1;
    } while (0 < x);
    y = y + -1;
    capture = capture + 0x400;
    dest = dest + 0xc0;
  } while (0 < y);
  return;
}