53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/* ppmcmap.h - header file for colormap routines in libppm
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*/
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/* Color histogram stuff. */
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#ifndef PPMCMAP_H
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#define PPMCMAP_H
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#include "pandabase.h"
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#include "pnmimage_base.h"
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typedef struct colorhist_item* colorhist_vector;
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struct colorhist_item
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{
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pixel color;
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int value;
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};
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typedef struct colorhist_list_item* colorhist_list;
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struct colorhist_list_item
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{
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struct colorhist_item ch;
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colorhist_list next;
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};
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EXPCL_PANDA_PNMIMAGE colorhist_vector ppm_computecolorhist( pixel** pixels, int cols, int rows, int maxcolors, int* colorsP );
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/* Returns a colorhist *colorsP long (with space allocated for maxcolors. */
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EXPCL_PANDA_PNMIMAGE void ppm_addtocolorhist ( colorhist_vector chv, int* colorsP, int maxcolors, pixel* colorP, int value, int position );
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EXPCL_PANDA_PNMIMAGE void ppm_freecolorhist( colorhist_vector chv );
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/* Color hash table stuff. */
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typedef colorhist_list* colorhash_table;
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EXPCL_PANDA_PNMIMAGE colorhash_table ppm_computecolorhash ( pixel** pixels, int cols, int rows, int maxcolors, int* colorsP );
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EXPCL_PANDA_PNMIMAGE int
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ppm_lookupcolor( colorhash_table cht, pixel* colorP );
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EXPCL_PANDA_PNMIMAGE colorhist_vector ppm_colorhashtocolorhist ( colorhash_table cht, int maxcolors );
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EXPCL_PANDA_PNMIMAGE colorhash_table ppm_colorhisttocolorhash( colorhist_vector chv, int colors );
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EXPCL_PANDA_PNMIMAGE int ppm_addtocolorhash ( colorhash_table cht, pixel* colorP, int value );
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/* Returns -1 on failure. */
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EXPCL_PANDA_PNMIMAGE colorhash_table ppm_alloccolorhash ( void );
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EXPCL_PANDA_PNMIMAGE void ppm_freecolorhash( colorhash_table cht );
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#endif
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