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- /* ppmcmap.h - header file for colormap routines in libppm
- */
-
- /* 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** pixels, int cols, int rows, int maxcolors, int* colorsP );
- /* Returns a colorhist *colorsP long (with space allocated for maxcolors. */
-
- void ppm_addtocolorhist ( colorhist_vector chv, int* colorsP, int maxcolors, pixel* colorP, int value, int position );
-
- void ppm_freecolorhist ( colorhist_vector chv );
-
-
- /* Color hash table stuff. */
-
- typedef colorhist_list* colorhash_table;
-
- colorhash_table ppm_computecolorhash ( pixel** pixels, int cols, int rows, int maxcolors, int* colorsP );
-
- int
- ppm_lookupcolor ( colorhash_table cht, pixel* colorP );
-
- colorhist_vector ppm_colorhashtocolorhist ( colorhash_table cht, int maxcolors );
- colorhash_table ppm_colorhisttocolorhash ( colorhist_vector chv, int colors );
-
- int ppm_addtocolorhash ( colorhash_table cht, pixel* colorP, int value );
- /* Returns -1 on failure. */
-
- colorhash_table ppm_alloccolorhash ( void );
-
- void ppm_freecolorhash ( colorhash_table cht );
-