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Usenet 1994 October
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usenetsourcesnewsgroupsinfomagicoctober1994disk2.iso
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misc
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volume9
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pbmplus
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part12
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ppm
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ppmcmap.h
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C/C++ Source or Header
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1989-11-26
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1KB
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45 lines
/* 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 color, 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 color */ );
colorhist_vector ppm_colorhashtocolorhist( /* colorhash_table cht, int maxcolors */ );
colorhash_table ppm_colorhisttocolorhash( /* colorhist_vector chv, int colors */ );
void ppm_addtocolorhash( /* colorhash_table cht, pixel color, int value */ );
colorhash_table ppm_alloccolorhash( /* */ );
void ppm_freecolorhash( /* colorhash_table cht */ );