diff options
| author | Brian Paul <[email protected]> | 2002-04-04 16:53:26 +0000 |
|---|---|---|
| committer | Brian Paul <[email protected]> | 2002-04-04 16:53:26 +0000 |
| commit | d5c94ef40d9dfef9ad4ecaa56218150f903014e3 (patch) | |
| tree | a67893194227fd9ece74d2bfa563c6a79c63aedb /src/mesa/swrast | |
| parent | 543381510d942246020dfe5f71748539fed0d290 (diff) | |
fixed 16 bit/channel problem in blend_modulate()
Diffstat (limited to 'src/mesa/swrast')
| -rw-r--r-- | src/mesa/swrast/s_blend.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/src/mesa/swrast/s_blend.c b/src/mesa/swrast/s_blend.c index 73c03d1a634..3fdb808abf0 100644 --- a/src/mesa/swrast/s_blend.c +++ b/src/mesa/swrast/s_blend.c @@ -1,4 +1,4 @@ -/* $Id: s_blend.c,v 1.17 2002/04/04 01:40:18 brianp Exp $ */ +/* $Id: s_blend.c,v 1.18 2002/04/04 16:53:26 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -274,11 +274,20 @@ blend_modulate( GLcontext *ctx, GLuint n, const GLubyte mask[], rgba[i][GCOMP] = rgba[i][GCOMP] * dest[i][GCOMP]; rgba[i][BCOMP] = rgba[i][BCOMP] * dest[i][BCOMP]; rgba[i][ACOMP] = rgba[i][ACOMP] * dest[i][ACOMP]; +#elif CHAN_TYPE == GL_UNSIGNED_SHORT + GLint r = (rgba[i][RCOMP] * dest[i][RCOMP] + 65535) >> 16; + GLint g = (rgba[i][GCOMP] * dest[i][GCOMP] + 65535) >> 16; + GLint b = (rgba[i][BCOMP] * dest[i][BCOMP] + 65535) >> 16; + GLint a = (rgba[i][ACOMP] * dest[i][ACOMP] + 65535) >> 16; + rgba[i][RCOMP] = (GLchan) r; + rgba[i][GCOMP] = (GLchan) g; + rgba[i][BCOMP] = (GLchan) b; + rgba[i][ACOMP] = (GLchan) a; #else - GLint r = (rgba[i][RCOMP] * dest[i][RCOMP]) >> 8; - GLint g = (rgba[i][GCOMP] * dest[i][GCOMP]) >> 8; - GLint b = (rgba[i][BCOMP] * dest[i][BCOMP]) >> 8; - GLint a = (rgba[i][ACOMP] * dest[i][ACOMP]) >> 8; + GLint r = (rgba[i][RCOMP] * dest[i][RCOMP] + 255) >> 8; + GLint g = (rgba[i][GCOMP] * dest[i][GCOMP] + 255) >> 8; + GLint b = (rgba[i][BCOMP] * dest[i][BCOMP] + 255) >> 8; + GLint a = (rgba[i][ACOMP] * dest[i][ACOMP] + 255) >> 8; rgba[i][RCOMP] = (GLchan) r; rgba[i][GCOMP] = (GLchan) g; rgba[i][BCOMP] = (GLchan) b; |