-
Notifications
You must be signed in to change notification settings - Fork 11
/
readers.h
111 lines (93 loc) · 3.22 KB
/
readers.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
#include <pixman.h>
#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;
pixman_image_t *p;
};
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);
void ida_image_alloc(struct ida_image *img);
uint8_t *ida_image_scanline(struct ida_image *img, int y);
uint32_t ida_image_stride(struct ida_image *img);
uint32_t ida_image_bpp(struct ida_image *img);
void ida_image_free(struct ida_image *img);
/* ----------------------------------------------------------------------- */
/* 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);