w3d/pnm.h

   1 #ifndef __PPM_H
   2 #define __PPM_H
   3
   4 #include "w3dtypes.h"
   5
   6 /**
   7  *   Returns number of color channels (1 == grayscale, 3 == rgb)
   8  *   or -1 on error.
   9  */
  10 extern int read_pnm_header (char *fname, int *w, int *h);
  11
  12 /**
  13  *   Read pnm into buf. Assumes you have called read_pnm_header()
  14  *   and allocated buf before.
  15  */
  16 extern int read_pnm (char *fname, uint8_t *buf);
  17
  18 /**
  19  *   Write buf into pnm file. Depending of the suffix of fname we
  20  *   assume 1 channel for '.png' and 3 channels for '.ppm'
  21  */
  22 extern void write_pnm (char *fname, uint8_t *buf, int w, int h);
  23
  24 /**
  25  *   Write a int16_t buf into pgm file
  26  */
  27 extern void write_pgm16 (char *fname, int16_t *buf, int w, int h, int16_t offset);
  28
  29 #endif
  30