From e6b647e8ec1e2c4bc979541179ba093ba1cc5291 Mon Sep 17 00:00:00 2001 From: ppatience0 Date: Wed, 3 Jul 2013 20:49:33 -0400 Subject: tif: rescale palette color map to [0, 255] --- sys/src/cmd/jpg/readtif.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/sys/src/cmd/jpg/readtif.c b/sys/src/cmd/jpg/readtif.c index 75c80f27f..9d2f926e2 100644 --- a/sys/src/cmd/jpg/readtif.c +++ b/sys/src/cmd/jpg/readtif.c @@ -1286,10 +1286,16 @@ static int paldecode(Tif *t, Rawimage *im, uchar *data) { int pix, pmask, xmask; - ulong i, n, x, y, *r, *g, *b; + ulong i, n, x, y, *r, *g, *b, max; pmask = (1 << t->depth) - 1; xmask = 7 >> log2[t->depth]; + for(i = max = 0; i < t->ncolor; i++) { + if(t->color[i] > max) + max = t->color[i]; + } + for(i = 0; i < t->ncolor; i++) + t->color[i] = (t->color[i] * 0xff) / max; r = t->color; g = r + pmask + 1; b = g + pmask + 1; -- cgit v1.2.3