readpnm.h

zgv-5.6,一个Linux系统下的图片浏览器(VGA/SVGA)

/* Zgv v2.7 - GIF, JPEG and PBM/PGM/PPM viewer, for VGA PCs running Linux.
 * Copyright (C) 1993-1995 Russell Marks. See README for license details.
 *
 * readpnm.h
 */

extern int read_pnm_file(char *filename,hffunc howfarfunc,unsigned char **bmap,
                  unsigned char **pal,int *output_type,PICINFO *pp);
extern int read_pnm_main(FILE *fp,hffunc howfarfunc,unsigned char **bmap,
                  unsigned char **pal,int *output_type,PICINFO *pp,
                  int (*closefunc)(FILE *));
extern int read_xv332(char *filename, unsigned char **bmap,
                      int *width, int *height);

extern int ditherinit(int w);
extern void ditherfinish(void);
extern void ditherline(unsigned char *theline, int linenum, int width);
extern int read_xv332(char *filename, unsigned char **bmap,
                      int *width, int *height);
extern void make_332_palette(unsigned char *palptr);
extern void aborted_file_pnm_cleanup();