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
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
#include "mupdf/fitz.h"
#define DPI 72.0f
typedef struct img_document_s img_document;
typedef struct img_page_s img_page;
struct img_page_s
{
fz_page super;
fz_image *image;
};
struct img_document_s
{
fz_document super;
fz_image *image;
};
static void
img_drop_document(fz_context *ctx, img_document *doc)
{
fz_drop_image(ctx, doc->image);
}
static int
img_count_pages(fz_context *ctx, img_document *doc)
{
return 1;
}
static fz_rect *
img_bound_page(fz_context *ctx, img_page *page, fz_rect *bbox)
{
fz_image *image = page->image;
int xres, yres;
fz_image_resolution(image, &xres, &yres);
bbox->x0 = bbox->y0 = 0;
bbox->x1 = image->w * DPI / xres;
bbox->y1 = image->h * DPI / yres;
return bbox;
}
static void
img_run_page(fz_context *ctx, img_page *page, fz_device *dev, const fz_matrix *ctm, fz_cookie *cookie)
{
fz_matrix local_ctm = *ctm;
fz_image *image = page->image;
int xres, yres;
float w, h;
fz_image_resolution(image, &xres, &yres);
w = image->w * DPI / xres;
h = image->h * DPI / yres;
fz_pre_scale(&local_ctm, w, h);
fz_fill_image(ctx, dev, image, &local_ctm, 1);
}
static void
img_drop_page(fz_context *ctx, img_page *page)
{
fz_drop_image(ctx, page->image);
}
static img_page *
img_load_page(fz_context *ctx, img_document *doc, int number)
{
img_page *page;
if (number != 0)
return NULL;
page = fz_new_page(ctx, sizeof *page);
page->super.bound_page = (fz_page_bound_page_fn *)img_bound_page;
page->super.run_page_contents = (fz_page_run_page_contents_fn *)img_run_page;
page->super.drop_page = (fz_page_drop_page_fn *)img_drop_page;
page->image = fz_keep_image(ctx, doc->image);
return page;
}
static int
img_lookup_metadata(fz_context *ctx, img_document *doc, const char *key, char *buf, int size)
{
if (!strcmp(key, "format"))
return (int)fz_strlcpy(buf, "Image", size);
return -1;
}
static img_document *
img_new_document(fz_context *ctx, fz_image *image)
{
img_document *doc = fz_new_document(ctx, img_document);
doc->super.drop_document = (fz_document_drop_fn *)img_drop_document;
doc->super.count_pages = (fz_document_count_pages_fn *)img_count_pages;
doc->super.load_page = (fz_document_load_page_fn *)img_load_page;
doc->super.lookup_metadata = (fz_document_lookup_metadata_fn *)img_lookup_metadata;
doc->image = fz_keep_image(ctx, image);
return doc;
}
static img_document *
img_open_document_with_stream(fz_context *ctx, fz_stream *stm)
{
fz_buffer *buffer = NULL;
fz_image *image = NULL;
img_document *doc;
fz_var(buffer);
fz_var(image);
fz_try(ctx)
{
buffer = fz_read_all(ctx, stm, 1024);
image = fz_new_image_from_buffer(ctx, buffer);
doc = img_new_document(ctx, image);
}
fz_always(ctx)
{
fz_drop_image(ctx, image);
fz_drop_buffer(ctx, buffer);
}
fz_catch(ctx)
fz_rethrow(ctx);
return doc;
}
static int
img_recognize(fz_context *doc, const char *magic)
{
char *ext = strrchr(magic, '.');
if (ext)
{
if (!fz_strcasecmp(ext, ".png") || !fz_strcasecmp(ext, ".jpg") ||
!fz_strcasecmp(ext, ".jpeg") || !fz_strcasecmp(ext, ".jfif") ||
!fz_strcasecmp(ext, ".jfif-tbnl") || !fz_strcasecmp(ext, ".jpe") ||
!fz_strcasecmp(ext, ".gif") || !fz_strcasecmp(ext, ".bmp") ||
!fz_strcasecmp(ext, ".jpx") || !fz_strcasecmp(ext, ".jp2") ||
!fz_strcasecmp(ext, ".j2k") || !fz_strcasecmp(ext, ".wdp") ||
!fz_strcasecmp(ext, ".hdp") || !fz_strcasecmp(ext, ".jxr") ||
!fz_strcasecmp(ext, ".pbm") || !fz_strcasecmp(ext, ".pgm") ||
!fz_strcasecmp(ext, ".ppm") || !fz_strcasecmp(ext, ".pam") ||
!fz_strcasecmp(ext, ".pnm"))
return 100;
}
if (!strcmp(magic, "png") || !strcmp(magic, "image/png") ||
!strcmp(magic, "jpg") || !strcmp(magic, "image/jpeg") ||
!strcmp(magic, "jpeg") || !strcmp(magic, "image/pjpeg") ||
!strcmp(magic, "jpe") || !strcmp(magic, "jfif") ||
!strcmp(magic, "gif") || !strcmp(magic, "image/gif") ||
!strcmp(magic, "bmp") || !strcmp(magic, "image/bmp") ||
!strcmp(magic, "jpx") || !strcmp(magic, "image/jpx") ||
!strcmp(magic, "jp2") || !strcmp(magic, "image/jp2") ||
!strcmp(magic, "j2k") || !strcmp(magic, "wdp") ||
!strcmp(magic, "hdp") || !strcmp(magic, "image/vnd.ms-photo") ||
!strcmp(magic, "jxr") || !strcmp(magic, "image/jxr") ||
!strcmp(magic, "pbm") || !strcmp(magic, "image/x-portable-bitmap") ||
!strcmp(magic, "pgm") || !strcmp(magic, "image/x-portable-greymap") ||
!strcmp(magic, "ppm") || !strcmp(magic, "image/x-portable-pixmap") ||
!strcmp(magic, "pam") || !strcmp(magic, "image/x-portable-arbitrarymap") ||
!strcmp(magic, "pnm"))
return 100;
return 0;
}
fz_document_handler img_document_handler =
{
(fz_document_recognize_fn *)&img_recognize,
(fz_document_open_fn *)NULL,
(fz_document_open_with_stream_fn *)&img_open_document_with_stream
};
|
