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
|
/*
* Copyright (C) 2007
* pancake <pancake@youterm.com>
* esteve <esteve@eslack.org>
*
* logotool is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* logotool is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with logotool; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
int compress_image(char *srcf, char *dstf, int w, int h)
{
char buf[256];
char tmp[256];
int fd, fdout;
int i,ret;
fd = open(srcf, O_RDONLY);
if (fd == -1) {
printf("Cannot open file '%s' \n", srcf);
return 1;
}
fdout = open( dstf, O_CREAT | O_WRONLY , 0660 );
if (fdout == -1) {
printf("Cannot open file '%s' for writing\n", dstf);
return 1;
}
// TODO: force little endian!! (not safe for big endian)
write(fdout, &w, 4);
write(fdout, &h, 4);
for(;;) {
unsigned char c;
ret = read(fd, buf, 3*80);
c = (int)((2*ret/3)>>1);
write(fdout,&c, 1);
if (ret <= 0) break;
for(i=0;i<ret;i+=3) {
tmp[0] = buf[i+0]&0xf8;
tmp[0] |= buf[i+1]&0x07;
tmp[1] = buf[i+1]&0xe0;
tmp[1] |= buf[i+1]&0x1f;
write(fdout, tmp, 2);
}
}
close(fd);
close(fdout);
printf("eval PATH=$PWD:$PATH logotool -u %s\n", dstf);
return 1;
}
|
