158 lines
2.5 KiB
C
158 lines
2.5 KiB
C
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#include <u.h>
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#include <libc.h>
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#include <bio.h>
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#include <draw.h>
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#include <memdraw.h>
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#include "imagefile.h"
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static Memimage *memtochan(Memimage *, uint32_t);
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void
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usage(void)
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{
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fprint(2, "usage: %s [-c 'comment'] "
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"[-3bgGhklLptvyY] [file]\n", argv0);
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exits("usage");
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}
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void
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main(int argc, char *argv[])
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{
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Biobuf bout;
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Memimage *i, *ni;
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int fd, chanflag, comp, opt;
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char *err, *file, *c;
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uint32_t chan;
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chan = BGR24;
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chanflag = opt = 0;
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comp = 1;
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c = nil;
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ARGBEGIN {
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case '3': /* force RGB */
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chan = BGR24;
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chanflag = 1;
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break;
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case 'b':
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chan = GREY1;
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chanflag = 1;
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break;
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case 'c':
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c = EARGF(usage());
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break;
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case 'g': /* t4 */
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comp = 3;
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opt = 0;
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break;
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case 'G': /* t4 two-dimensional */
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comp = 3;
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opt = 1;
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break;
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case 'h': /* huffman */
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comp = 2;
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break;
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case 'k':
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chan = GREY8;
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chanflag = 1;
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break;
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case 'l': /* lzw */
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comp = 5;
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opt = 0;
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break;
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case 'L': /* lzw, horizontal differencing */
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comp = 5;
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opt = 1;
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break;
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case 'p': /* packbits */
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comp = 0x8005;
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break;
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case 't': /* t6 */
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comp = 4;
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break;
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case 'v': /* RGBV */
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chan = CMAP8;
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chanflag = 1;
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break;
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case 'y':
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chan = GREY2;
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chanflag = 1;
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break;
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case 'Y':
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chan = GREY4;
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chanflag = 1;
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break;
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default:
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usage();
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} ARGEND
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if(argc > 1)
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usage();
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if(argc == 0) {
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file = "<stdin>";
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fd = 0;
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} else {
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file = argv[0];
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if((fd = open(file, OREAD)) < 0)
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sysfatal("open %s: %r", file);
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}
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if(Binit(&bout, 1, OWRITE) < 0)
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sysfatal("Binit: %r");
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memimageinit();
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if((i = readmemimage(fd)) == nil)
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sysfatal("readmemimage %s: %r", file);
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close(fd);
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if(comp >= 2 && comp <= 4) {
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chan = GREY1;
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chanflag = 1;
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} else if(chan == GREY2) {
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if((ni = memtochan(i, chan)) == nil)
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sysfatal("memtochan: %r");
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if(i != ni) {
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freememimage(i);
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i = ni;
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}
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chan = GREY4;
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}
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if(!chanflag) {
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switch(i->chan) {
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case GREY1:
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case GREY4:
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case GREY8:
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case CMAP8:
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case BGR24:
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break;
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case GREY2:
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chan = GREY4;
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chanflag = 1;
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break;
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default:
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chanflag = 1;
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break;
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}
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}
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if(chanflag) {
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if((ni = memtochan(i, chan)) == nil)
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sysfatal("memtochan: %r");
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if(i != ni) {
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freememimage(i);
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i = ni;
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}
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}
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if((err = memwritetif(&bout, i, c, comp, opt)) != nil)
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fprint(2, "%s: %s\n", argv0, err);
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freememimage(i);
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exits(err);
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}
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static Memimage *
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memtochan(Memimage *i, uint32_t chan)
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{
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Memimage *ni;
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if(i->chan == chan)
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return i;
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if((ni = allocmemimage(i->r, chan)) == nil)
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return nil;
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memimagedraw(ni, ni->r, i, i->r.min, nil, i->r.min, S);
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return ni;
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}
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