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/* These declarations were supposed to be in the libfloyd.h file in the ilbm
package, but that file was missing, so I made them up myself.
- Bryan 01.03.10.
*/
#ifdef __cplusplus
extern "C" {
#endif
#if 0
} /* to fake out automatic code indenters */
#endif
struct ppm_fs_info {
/* thisXerr and nextXerr are dynamically allocated arrays each of whose
dimension is the width of the image plus 2
*/
long *thisrederr;
long *thisgreenerr;
long *thisblueerr;
long *nextrederr;
long *nextgreenerr;
long *nextblueerr;
int lefttoright;
int cols;
pixval maxval;
int flags;
pixel *pixrow;
int col_end;
pixval red, green, blue;
};
typedef struct ppm_fs_info ppm_fs_info;
/* Bitmasks for ppm_fs_info.flags */
#define FS_RANDOMINIT 0x01
#define FS_ALTERNATE 0x02
ppm_fs_info *
ppm_fs_init(int cols, pixval maxval, int flags);
void
ppm_fs_free(ppm_fs_info *fi);
int
ppm_fs_startrow(ppm_fs_info *fi, pixel *pixrow);
int
ppm_fs_next(ppm_fs_info *fi, int col);
void
ppm_fs_endrow(ppm_fs_info *fi);
void
ppm_fs_update( ppm_fs_info *fi, int col, pixel *pP);
void
ppm_fs_update3(ppm_fs_info * const fi,
int const col,
pixval const r,
pixval const g,
pixval const b);
#ifdef __cplusplus
}
#endif
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