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/* image data and metadata */
struct ida_image_info {
int width;
int height;
int dpi;
};
struct ida_image {
struct ida_image_info i;
unsigned char *data;
};
/* load image files */
struct ida_loader {
char *magic;
int moff;
int mlen;
char *name;
void* (*init)(FILE *fp, char *filename, struct ida_image_info *i);
void (*read)(unsigned char *dst, int line, void *data);
void (*done)(void *data);
};
/* ----------------------------------------------------------------------- */
/* resolution */
#define res_cm_to_inch(x) ((x * 2540 + 5) / 1000)
#define res_m_to_inch(x) ((x * 2540 + 5) / 100000)
#define res_inch_to_m(x) ((x * 100000 + 5) / 2540)
/* ----------------------------------------------------------------------- */
/* helpers */
void load_gray(unsigned char *dst, unsigned char *src, int width);
void load_graya(unsigned char *dst, unsigned char *src, int width);
void load_rgba(unsigned char *dst, unsigned char *src, int width);
/* import */
extern struct ida_loader ppm_loader;
extern struct ida_loader pgm_loader;
extern struct ida_loader xwd_loader;
extern struct ida_loader pcd_loader;
extern struct ida_loader xpm_loader;
extern struct ida_loader xbm1_loader;
extern struct ida_loader xbm2_loader;
extern struct ida_loader bmp_loader;
extern struct ida_loader jpeg_loader;
extern struct ida_loader gif_loader;
extern struct ida_loader png_loader;
extern struct ida_loader tiff1_loader;
extern struct ida_loader tiff2_loader;
extern struct ida_loader magick_loader;
extern struct ida_loader sane_loader;
/* export */
extern struct ida_writer ppm_writer;
extern struct ida_writer jpeg_writer;
extern struct ida_writer tiff_writer;
extern struct ida_writer ps_writer;
extern struct ida_writer png_writer;
/* lists */
extern struct ida_loader *loaders[];
extern struct ida_writer *writers[];
/* other */
extern int debug;
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