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#include "list.h"
enum ida_extype {
EXTRA_COMMENT = 1,
EXTRA_EXIF = 2,
};
struct ida_extra {
enum ida_extype type;
unsigned char *data;
unsigned int size;
struct ida_extra *next;
};
/* image data and metadata */
struct ida_image_info {
unsigned int width;
unsigned int height;
unsigned int dpi;
unsigned int npages;
struct ida_extra *extra;
int thumbnail;
unsigned int real_width;
unsigned int real_height;
};
struct ida_image {
struct ida_image_info i;
unsigned char *data;
};
struct ida_rect {
int x1,y1,x2,y2;
};
/* load image files */
struct ida_loader {
char *magic;
int moff;
int mlen;
char *name;
void* (*init)(FILE *fp, char *filename, unsigned int page,
struct ida_image_info *i, int thumbnail);
void (*read)(unsigned char *dst, unsigned int line, void *data);
void (*done)(void *data);
struct list_head list;
};
/* filter + operations */
struct ida_op {
char *name;
void* (*init)(struct ida_image *src, struct ida_rect *rect,
struct ida_image_info *i, void *parm);
void (*work)(struct ida_image *src, struct ida_rect *rect,
unsigned char *dst, int line,
void *data);
void (*done)(void *data);
};
void* op_none_init(struct ida_image *src, struct ida_rect *rect,
struct ida_image_info *i, void *parm);
void op_none_done(void *data);
void op_free_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_bits_lsb(unsigned char *dst, unsigned char *src, int width,
int on, int off);
void load_bits_msb(unsigned char *dst, unsigned char *src, int width,
int on, int off);
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);
int load_add_extra(struct ida_image_info *info, enum ida_extype type,
unsigned char *data, unsigned int size);
struct ida_extra* load_find_extra(struct ida_image_info *info,
enum ida_extype type);
int load_free_extras(struct ida_image_info *info);
/* ----------------------------------------------------------------------- */
/* other */
extern int debug;
extern struct ida_loader ppm_loader;
extern struct ida_loader jpeg_loader;
extern struct ida_loader sane_loader;
extern struct ida_writer ps_writer;
extern struct ida_writer jpeg_writer;
/* lists */
#define __init __attribute__ ((constructor))
#define __fini __attribute__ ((destructor))
extern struct list_head loaders;
void load_register(struct ida_loader *loader);
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