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
|
#include "mupdf/img.h"
#include <ctype.h> /* for tolower */
#define DPI 72.0f
static void image_init_document(image_document *doc);
struct image_document_s
{
fz_document super;
fz_context *ctx;
fz_stream *file;
fz_image *image;
};
image_document *
image_open_document_with_stream(fz_context *ctx, fz_stream *file)
{
image_document *doc;
fz_buffer *buffer = NULL;
doc = fz_malloc_struct(ctx, image_document);
image_init_document(doc);
doc->ctx = ctx;
doc->file = fz_keep_stream(file);
fz_var(buffer);
fz_try(ctx)
{
buffer = fz_read_all(doc->file, 1024);
doc->image = fz_new_image_from_buffer(ctx, buffer);
}
fz_always(ctx)
{
fz_drop_buffer(ctx, buffer);
}
fz_catch(ctx)
{
image_close_document(doc);
fz_rethrow(ctx);
}
return doc;
}
image_document *
image_open_document(fz_context *ctx, const char *filename)
{
fz_stream *file;
image_document *doc;
file = fz_open_file(ctx, filename);
if (!file)
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot open file '%s': %s", filename, strerror(errno));
fz_try(ctx)
{
doc = image_open_document_with_stream(ctx, file);
}
fz_always(ctx)
{
fz_close(file);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
return doc;
}
void
image_close_document(image_document *doc)
{
fz_context *ctx = doc->ctx;
fz_drop_image(ctx, doc->image);
fz_close(doc->file);
fz_free(ctx, doc);
}
int
image_count_pages(image_document *doc)
{
return 1;
}
image_page *
image_load_page(image_document *doc, int number)
{
if (number != 0)
return NULL;
return (image_page *)doc->image;
}
void
image_free_page(image_document *doc, image_page *page)
{
}
fz_rect *
image_bound_page(image_document *doc, image_page *page, fz_rect *bbox)
{
fz_image *image = (fz_image *)page;
bbox->x0 = bbox->y0 = 0;
bbox->x1 = image->w * DPI / image->xres;
bbox->y1 = image->h * DPI / image->yres;
return bbox;
}
void
image_run_page(image_document *doc, image_page *page, fz_device *dev, const fz_matrix *ctm, fz_cookie *cookie)
{
fz_matrix local_ctm = *ctm;
fz_image *image = (fz_image *)page;
float w = image->w * DPI / image->xres;
float h = image->h * DPI / image->yres;
fz_pre_scale(&local_ctm, w, h);
fz_fill_image(dev, image, &local_ctm, 1);
}
static int
image_meta(image_document *doc, int key, void *ptr, int size)
{
switch(key)
{
case FZ_META_FORMAT_INFO:
sprintf((char *)ptr, "IMAGE");
return FZ_META_OK;
default:
return FZ_META_UNKNOWN_KEY;
}
}
static void
image_rebind(image_document *doc, fz_context *ctx)
{
doc->ctx = ctx;
fz_rebind_stream(doc->file, ctx);
}
static void
image_init_document(image_document *doc)
{
doc->super.close = (void*)image_close_document;
doc->super.count_pages = (void*)image_count_pages;
doc->super.load_page = (void*)image_load_page;
doc->super.bound_page = (void*)image_bound_page;
doc->super.run_page_contents = (void*)image_run_page;
doc->super.free_page = (void*)image_free_page;
doc->super.meta = (void*)image_meta;
doc->super.rebind = (void*)image_rebind;
}
|