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
|
// ==========================================================
// FreeImage 3 Test Script
//
// Design and implementation by
// - Herv Drolon (drolon@infonie.fr)
//
// This file is part of FreeImage 3
//
// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
// THIS DISCLAIMER.
//
// Use at your own risk!
// ==========================================================
#include "TestSuite.h"
void testSaveMemIO(const char *lpszPathName) {
FIMEMORY *hmem = NULL;
// load a regular file
FREE_IMAGE_FORMAT fif = FreeImage_GetFileType(lpszPathName);
FIBITMAP *dib = FreeImage_Load(fif, lpszPathName, 0);
// open a memory handle
hmem = FreeImage_OpenMemory();
// save the file to memory
FreeImage_SaveToMemory(fif, dib, hmem, 0);
// at this point, hmem contains the entire PNG data in memory.
// the amount of space used by the memory is equal to file_size
long file_size = FreeImage_TellMemory(hmem);
printf("File size : %ld\n", file_size);
// its easy load an image from memory as well
// seek to the start of the memory stream
FreeImage_SeekMemory(hmem, 0L, SEEK_SET);
// get the file type
FREE_IMAGE_FORMAT mem_fif = FreeImage_GetFileTypeFromMemory(hmem, 0);
// load an image from the memory handle
FIBITMAP *check = FreeImage_LoadFromMemory(mem_fif, hmem, 0);
// save as a regular file
FreeImage_Save(FIF_PNG, check, "dump.png", PNG_DEFAULT);
// make sure to free the data since FreeImage_SaveToMemory
// will cause it to be malloc'd
FreeImage_CloseMemory(hmem);
FreeImage_Unload(check);
FreeImage_Unload(dib);
}
//you could also have image data in memory via some other method, and just set
//fmh.data to point to it, and set both fmh.datalen and fmh.filelen to the
//size of that data, then FreeImage_LoadFromMemory could load the image from that memory
void testLoadMemIO(const char *lpszPathName) {
struct stat buf;
int result;
// get data associated with lpszPathName
result = stat(lpszPathName, &buf);
if(result == 0) {
// allocate a memory buffer and load temporary data
BYTE *mem_buffer = (BYTE*)malloc(buf.st_size * sizeof(BYTE));
if(mem_buffer) {
FILE *stream = fopen(lpszPathName, "rb");
if(stream) {
fread(mem_buffer, sizeof(BYTE), buf.st_size, stream);
fclose(stream);
// attach the binary data to a memory stream
FIMEMORY *hmem = FreeImage_OpenMemory(mem_buffer, buf.st_size);
// get the file type
FREE_IMAGE_FORMAT fif = FreeImage_GetFileTypeFromMemory(hmem, 0);
// load an image from the memory stream
FIBITMAP *check = FreeImage_LoadFromMemory(fif, hmem, PNG_DEFAULT);
// save as a regular file
FreeImage_Save(FIF_PNG, check, "blob.png", PNG_DEFAULT);
FreeImage_Unload(check);
// close the stream
FreeImage_CloseMemory(hmem);
}
}
// user is responsible for freeing the data
free(mem_buffer);
}
}
void testAcquireMemIO(const char *lpszPathName) {
FIMEMORY *hmem = NULL;
// load a regular file
FREE_IMAGE_FORMAT fif = FreeImage_GetFileType(lpszPathName);
FIBITMAP *dib = FreeImage_Load(fif, lpszPathName, 0);
// open and allocate a memory stream
hmem = FreeImage_OpenMemory();
// save the file to memory
FreeImage_SaveToMemory(FIF_PNG, dib, hmem, PNG_DEFAULT);
FreeImage_Unload(dib);
// get the buffer from the memory stream
BYTE *mem_buffer = NULL;
DWORD size_in_bytes = 0;
FreeImage_AcquireMemory(hmem, &mem_buffer, &size_in_bytes);
// save the buffer in a file stream
FILE *stream = fopen("buffer.png", "wb");
if(stream) {
fwrite(mem_buffer, sizeof(BYTE), size_in_bytes, stream);
fclose(stream);
}
// close and free the memory stream
FreeImage_CloseMemory(hmem);
}
void testMemIO(const char *lpszPathName) {
testSaveMemIO(lpszPathName);
testLoadMemIO(lpszPathName);
testAcquireMemIO(lpszPathName);
}
|
