35 lines
887 B
Text
35 lines
887 B
Text
/* Handle PNM-files Dez98 JS
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* 0,0 = left up
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* PAM-formats
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* PAM any P7
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* PNM-formats
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* PGM gray ASCII=P2 RAW=P5 dx dy col gray
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* PPM RGB ASCII=P3 RAW=P6 dx dy col RGB
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* PBM B/W ASCII=P1 RAW=P4 dx dy bitmap
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*/
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#ifndef GOCR_PNM_H
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#define GOCR_PNM_H 1
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#include "config.h"
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struct pixmap {
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unsigned char *p; /* pointer of image buffer (pixmap) */
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int x; /* xsize */
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int y; /* ysize */
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int bpp; /* bytes per pixel: 1=gray 3=rgb */
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};
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typedef struct pixmap pix;
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/* return 1 on multiple images (holding file open), 0 else */
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int readpgm(char *name, pix *p, int vvv);
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/* write pgm-map to pnm-file */
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int writepgm(char *nam, pix *p);
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int writepbm(char *nam, pix *p);
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int writeppm(char *nam, pix *p); /* use lowest 3 bits for farbcoding */
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/* ----- count colors ------ create histogram ------- */
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void makehisto(pix p, unsigned col[256], int vvv);
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#endif
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