#ifndef H_IMAGEPALC
 #define H_IMAGEPALC
 #ifdef __cplusplus
  extern "C" {
 #endif


/***
 * IMAGE PALETTIZING FUNCTIONS
 */


/* Create a palette with a maximum of nColors colors for this image. */
int CreateRGBPalette(unsigned char (*data)[3], int w, int h,
                     unsigned char (**palette)[3], int nColors);


/* 'Posterize' the image using the specified palette. */
int RGB2Pal(unsigned char (*rgb)[3], unsigned char **pal,
            int w, int h,
            unsigned char (*palette)[3], int nColors);


/***
 * IMAGE DITHERING FUNCTIONS
 */


/*
 * Dither from "in" grayscale image to "out" monotone image,
 * with scaling if necessary.
 */
int DitherGray2BW(unsigned char *input_image, int xdim_in, int ydim_in,
                  unsigned char **output_image, int xdim_out, int ydim_out);


/*
 * Dither a 24-bit image onto the provided palette.
 * If 'palette' is NULL, then CreateRGBPalette(data, w, h, [temp], nColors)
 * before dithering.
 */
int DitherRGB(unsigned char (*data)[3], int w, int h,
              unsigned char (*palette)[3], int nColors);


/* Convert palettized to RGB data. */
int Pal2RGB(unsigned char *pal, unsigned char (**rgb)[3],
            int w, int h,
            unsigned char (*palette)[3], int nColors);


 #ifdef __cplusplus
   }
 #endif
#endif