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
|
/*
* compile with:
*
* g++ -g -Wall buffer.cpp `pkg-config vips-cpp --cflags --libs`
*
*/
#define DEBUG
#include <vips/vips8>
using namespace vips;
int
main(int argc, char **argv)
{
if (VIPS_INIT(argv[0]))
vips_error_exit(NULL);
// load an image from a file
VImage im = VImage::new_from_file(argv[1],
VImage::option()->set("access", "sequential"));
printf("loaded %d x %d pixel image from %s\n",
im.width(), im.height(), argv[1]);
// write to a formatted memory buffer
size_t size;
void *buf;
im.write_to_buffer(".png", &buf, &size);
printf("written to memory %p in png format, %zu bytes\n", buf, size);
// load from the formatted memory area
im = VImage::new_from_buffer(buf, size, "");
printf("loaded from memory, %d x %d pixel image\n",
im.width(), im.height());
// write back to a file
im.write_to_file(argv[2]);
printf("written back to %s\n", argv[2]);
return 0;
}
|
