summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--src/mesa/swrast/s_blend.c19
1 files changed, 14 insertions, 5 deletions
diff --git a/src/mesa/swrast/s_blend.c b/src/mesa/swrast/s_blend.c
index 73c03d1a63..3fdb808abf 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;