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  1. /*
  2.     SDL - Simple DirectMedia Layer
  3.     Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga
  4.  
  5.     This library is free software; you can redistribute it and/or
  6.     modify it under the terms of the GNU Library General Public
  7.     License as published by the Free Software Foundation; either
  8.     version 2 of the License, or (at your option) any later version.
  9.  
  10.     This library is distributed in the hope that it will be useful,
  11.     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12.     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13.     Library General Public License for more details.
  14.  
  15.     You should have received a copy of the GNU Library General Public
  16.     License along with this library; if not, write to the Free
  17.     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18.  
  19.     Sam Lantinga
  20.     slouken@devolution.com
  21. */
  22.  
  23. #ifdef SAVE_RCSID
  24. static char rcsid =
  25.  "@(#) $Id: SDL_pixels_c.h,v 1.2 2001/04/26 16:50:18 hercules Exp $";
  26. #endif
  27.  
  28. /* Useful functions and variables from SDL_pixel.c */
  29.  
  30. #include "SDL_blit.h"
  31.  
  32. /* Pixel format functions */
  33. extern SDL_PixelFormat *SDL_AllocFormat(int bpp,
  34.                 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask);
  35. extern SDL_PixelFormat *SDL_ReallocFormat(SDL_Surface *surface, int bpp,
  36.                 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask);
  37. extern void SDL_FormatChanged(SDL_Surface *surface);
  38. extern void SDL_FreeFormat(SDL_PixelFormat *format);
  39.  
  40. /* Blit mapping functions */
  41. extern SDL_BlitMap *SDL_AllocBlitMap(void);
  42. extern void SDL_InvalidateMap(SDL_BlitMap *map);
  43. extern int SDL_MapSurface (SDL_Surface *src, SDL_Surface *dst);
  44. extern void SDL_FreeBlitMap(SDL_BlitMap *map);
  45.  
  46. /* Miscellaneous functions */
  47. extern Uint16 SDL_CalculatePitch(SDL_Surface *surface);
  48. extern void SDL_DitherColors(SDL_Color *colors, int bpp);
  49. extern Uint8 SDL_FindColor(SDL_Palette *pal, Uint8 r, Uint8 g, Uint8 b);
  50. extern void SDL_ApplyGamma(Uint16 *gamma, SDL_Color *colors, SDL_Color *output, int ncolors);
  51.