1. inline void PutPixel(int x, int y, Uint32 color)
  2. {
  3.     if (x >= 0 && x < screenWidth && y >= 0 && y < screenHeight)
  4.     {
  5.     switch (screen->format->BytesPerPixel)
  6.     {
  7.         case 1: // Assuming 8-bpp
  8.         {
  9.             Uint8 *bufp;
  10.             bufp = (Uint8 *)screen->pixels + y*screen->pitch + x;
  11.             *bufp = color;
  12.         }
  13.         break;
  14.         case 2: // Probably 15-bpp or 16-bpp
  15.         {
  16.             Uint16 *bufp;
  17.             bufp = (Uint16 *)screen->pixels + y*screen->pitch/2 + x;
  18.             *bufp = color;
  19.         }
  20.         break;
  21.         case 3: // Slow 24-bpp mode, usually not used
  22.         {
  23.             Uint8 *bufp;
  24.             bufp = (Uint8 *)screen->pixels + y*screen->pitch + x * 3;
  25.             if(SDL_BYTEORDER == SDL_LIL_ENDIAN)
  26.             {
  27.                 bufp[0] = color;
  28.                 bufp[1] = color >> 8;
  29.                 bufp[2] = color >> 16;
  30.             } else {
  31.                 bufp[2] = color;
  32.                 bufp[1] = color >> 8;
  33.                 bufp[0] = color >> 16;
  34.             }
  35.         }
  36.         break;
  37.         case 4: // Probably 32-bpp
  38.         {
  39.             Uint32 *bufp;
  40.             bufp = (Uint32 *)screen->pixels + y*screen->pitch/4 + x;
  41.             *bufp = color;
  42.         }
  43.         break;
  44.     }
  45.     }
  46. }
  47.