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#ifndef PPMCMAP_INCLUDED
#define PPMCMAP_INCLUDED
/* ppmcmap.h - header file for colormap routines in libppm
*/
#ifdef __cplusplus
extern "C" {
#endif
#if 0
} /* to fake out automatic code indenters */
#endif
/* Color histogram stuff. */
typedef struct colorhist_item* colorhist_vector;
struct colorhist_item {
pixel color;
int value;
};
typedef struct colorhist_list_item* colorhist_list;
struct colorhist_list_item {
struct colorhist_item ch;
colorhist_list next;
};
colorhist_vector
ppm_computecolorhist( pixel ** const pixels,
const int cols, const int rows, const int maxcolors,
int * const colorsP );
colorhist_vector
ppm_computecolorhist2(FILE * const ifp,
const int cols, const int rows,
const pixval maxval, const int format,
const int maxcolors, int * const colorsP );
void
ppm_addtocolorhist( colorhist_vector chv,
int * const colorsP, const int maxcolors,
const pixel * const colorP,
const int value, const int position );
void
ppm_freecolorhist(colorhist_vector const chv);
/* Color hash table stuff. */
typedef colorhist_list* colorhash_table;
colorhash_table
ppm_computecolorhash( pixel ** const pixels,
const int cols, const int rows,
const int maxcolors, int * const colorsP );
colorhash_table
ppm_computecolorhash2(FILE * const ifp,
const int cols, const int rows,
const pixval maxval, const int format,
const int maxcolors, int * const colorsP);
int
ppm_lookupcolor(colorhash_table const cht,
const pixel * const colorP );
colorhist_vector
ppm_colorhashtocolorhist(colorhash_table const cht,
int const maxcolors);
colorhash_table
ppm_colorhisttocolorhash(colorhist_vector const chv,
int const colors);
int
ppm_addtocolorhash(colorhash_table const cht,
const pixel * const colorP,
int const value);
void
ppm_delfromcolorhash(colorhash_table const cht,
const pixel * const colorP);
colorhash_table
ppm_alloccolorhash(void);
void
ppm_freecolorhash(colorhash_table const cht);
colorhash_table ppm_colorrowtocolorhash ARGS((pixel *colorrow, int ncolors));
pixel * ppm_computecolorrow ARGS((pixel **pixels, int cols, int rows, int maxcolors, int *ncolorsP));
pixel * ppm_mapfiletocolorrow ARGS((FILE *file, int maxcolors, int *ncolorsP, pixval *maxvalP));
void ppm_colorrowtomapfile ARGS((FILE *ofp, pixel *colormap, int ncolors, pixval maxval));
void ppm_sortcolorrow (pixel * const colorrow, const int ncolors,
int (*cmpfunc)(pixel *, pixel *) );
int ppm_addtocolorrow ARGS((pixel *colorrow, int *ncolorsP, int maxcolors, pixel *pixelP));
int
ppm_findclosestcolor(const pixel * const colormap,
int const ncolors,
const pixel * const pP);
/* standard sort function for ppm_sortcolorrow() */
#define PPM_STDSORT (int (*)(pixel *, pixel *))0
#endif
#ifdef __cplusplus
}
#endif
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