From a44a1dbd19c2a9b05b497e32853e57ca88495397 Mon Sep 17 00:00:00 2001 From: cinap_lenrek Date: Wed, 11 Mar 2015 12:59:19 +0100 Subject: gif: fix color table clipping (for cb5.gif) --- sys/src/cmd/jpg/readgif.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/sys/src/cmd/jpg/readgif.c b/sys/src/cmd/jpg/readgif.c index d5c0d1d7d..cac585325 100644 --- a/sys/src/cmd/jpg/readgif.c +++ b/sys/src/cmd/jpg/readgif.c @@ -376,7 +376,7 @@ static uchar* decode(Header *h, Rawimage *i, Entry *tbl) { - int c, doclip, incode, codesize, CTM, EOD, pici, datai, stacki, nbits, sreg, fc, code, piclen; + int c, incode, codesize, CTM, EOD, pici, datai, stacki, nbits, sreg, fc, code, piclen; int csize, nentry, maxentry, first, ocode, ndata, nb; uchar clip, *p, *pic; uchar stack[4096], data[256]; @@ -386,10 +386,6 @@ decode(Header *h, Rawimage *i, Entry *tbl) codesize = h->buf[0]; if(codesize>8 || 0>codesize) giferror(h, "ReadGIF: can't handle codesize %d", codesize); - doclip = 0; - if(i->cmap!=nil && i->cmaplen!=3*(1<cmaplen!=3*2)) /* peculiar GIF bitmap files... */ - doclip = 1; CTM =1<cmaplen/3; + if(i->cmap!=nil && i->cmaplen!=3*256){ + clip = (i->cmaplen/3)-1; for(p = pic; p < pic+piclen; p++) - if(*p >= clip) + if(*p > clip) *p = clip; } h->pic = nil; -- cgit v1.2.3