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#include <u.h>
#include <libc.h>
#include <draw.h>
#include <memdraw.h>
#include <ctype.h>
#include <bio.h>
#include "imagefile.h"
void
usage(void)
{
fprint(2, "usage: togif [-l loopcount] [-c 'comment'] [-d Δt (ms)] [-t transparency-index] [file ... [-d Δt] file ...]\n");
exits("usage");
}
#define UNSET (-12345678)
void
main(int argc, char *argv[])
{
Biobuf bout;
Memimage *i, *ni;
int fd, j, dt, trans, loop;
char buf[256];
char *err, *comment, *s;
comment = nil;
dt = -1;
trans = -1;
loop = UNSET;
ARGBEGIN{
case 'l':
s = ARGF();
if(s==nil || (!isdigit(s[0]) && s[0]!='-'))
usage();
loop = atoi(s);
break;
case 'c':
comment = ARGF();
if(comment == nil)
usage();
break;
case 'd':
s = ARGF();
if(s==nil || !isdigit(s[0]))
usage();
dt = atoi(s);
break;
case 't':
s = ARGF();
if(s==nil || !isdigit(s[0]))
usage();
trans = atoi(s);
if(trans > 255)
usage();
break;
default:
usage();
}ARGEND
if(Binit(&bout, 1, OWRITE) < 0)
sysfatal("Binit failed: %r");
memimageinit();
err = nil;
if(argc == 0){
i = readmemimage(0);
if(i == nil)
sysfatal("reading input: %r");
ni = memonechan(i);
if(ni == nil)
sysfatal("converting image to RGBV: %r");
if(i != ni){
freememimage(i);
i = ni;
}
err = memstartgif(&bout, i, -1);
if(err == nil){
if(comment)
err = memwritegif(&bout, i, comment, dt, trans);
else{
snprint(buf, sizeof buf, "Converted by Plan 9 from <stdin>");
err = memwritegif(&bout, i, buf, dt, trans);
}
}
}else{
if(loop == UNSET){
if(argc == 1)
loop = -1; /* no loop for single image */
else
loop = 0; /* the default case: 0 means infinite loop */
}
for(j=0; j<argc; j++){
if(argv[j][0] == '-' && argv[j][1]=='d'){
/* time change */
if(argv[j][2] == '\0'){
s = argv[++j];
if(j == argc)
usage();
}else
s = &argv[j][2];
if(!isdigit(s[0]))
usage();
dt = atoi(s);
if(j == argc-1) /* last argument must be file */
usage();
continue;
}
fd = open(argv[j], OREAD);
if(fd < 0)
sysfatal("can't open %s: %r", argv[j]);
i = readmemimage(fd);
if(i == nil)
sysfatal("can't readimage %s: %r", argv[j]);
close(fd);
ni = memonechan(i);
if(ni == nil)
sysfatal("converting image to RGBV: %r");
if(i != ni){
freememimage(i);
i = ni;
}
if(j == 0){
err = memstartgif(&bout, i, loop);
if(err != nil)
break;
}
if(comment)
err = memwritegif(&bout, i, comment, dt, trans);
else{
snprint(buf, sizeof buf, "Converted by Plan 9 from %s", argv[j]);
err = memwritegif(&bout, i, buf, dt, trans);
}
if(err != nil)
break;
freememimage(i);
comment = nil;
}
}
memendgif(&bout);
if(err != nil)
fprint(2, "togif: %s\n", err);
exits(err);
}
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