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