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/*
* logotool - tool to modify logo images with simple compression
* Copyright (C) 2007
* pancake <pancake@youterm.com>
* esteve <esteve@eslack.org>
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#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 uncompress_image(char *srcf, char *dstf)
{
int fd;
int fout;
int width,height;
int fsize;
char* src;
char* dst;
char* src2;
char* eof;
char *deof;
char* dst2 = NULL;
unsigned char byte;
fd = open( srcf, O_RDONLY );
if (fd == -1) {
printf("Cannot open file '%s'\n", srcf);
return 1;
}
fout = open( dstf, O_CREAT | O_WRONLY , 0660 );
if (fout == -1) {
printf("Cannot open file '%s' for writing\n", dstf);
return 1;
}
fprintf(stderr, "Input file: %s\n", srcf);
fprintf(stderr, "Output file: %s\n", dstf);
fsize = lseek ( fd, 0,SEEK_END);
fsize = lseek ( fd, 0,SEEK_CUR);
lseek ( fd,0, SEEK_SET);
fsize -= 8;
read ( fd, &width, 4 );
read ( fd, &height, 4 );
fprintf(stderr, "Width: %d\nHeight: %d\n",width, height);
fprintf(stderr, "Input Size: %d\n",fsize);
src = malloc ( fsize );
dst = malloc ( width*height*2 );
deof = dst+width*height*2;
if (src == (void *)-1 || dst == (void *)-1 ) {
printf("Cannot malloc\n");
return 1;
}
memset(dst,'\0', width*height*2);
read(fd, src, fsize);
eof = src+fsize;
for(dst2 = dst, src2 = src; src2<eof;) {
//byte = src2[0] & 0xff;
//src2 = src2 + 1;
byte=(*src2++)&0xff;
// [1xxxyyyy] [char] [char]
// copies xxxyyyy times two chars
if (byte > 0x7f) {
int i,j = byte&0x7f;
for(i=0; i++<j; dst2+=2)
memcpy(dst2, src2, 2);
src2+=2;
} else {
if ( byte != 0x00 ) {
byte<<=1;
// fprintf(stderr, "COPYING: %d %d\n", byte, (eof-src2));
if ((dst2+byte >= deof || (src2+byte >= eof))) {
fprintf(stderr, "Break\n");
break;
}
memcpy(dst2, src2, byte);
src2+=byte; dst2+=byte;
}
}
}
fprintf(stderr, "Output Size: %lld\n",(long long int)(dst2-dst));
if ((dst2-dst)!=(width*height*2))
fprintf(stderr, "failed?\n");
write ( fout, dst, width*height*2);
close(fout);
close(fd);
//printf("./logotool -w %d -h %d -v %s || \n", width, height, dstf);
//printf("logotool -w %d -h %d -v %s\n", width, height, dstf);
printf("eval PATH=$PWD:$PATH logotool -w %d -h %d -m %s\n", width, height, dstf);
return 0;
}
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