[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [14245] trunk/blender/source/blender/ render/intern/source/imagetexture.c:

[Brecht Van Lommel]

Revision: 14245
          http://projects.blender.org/plugins/scmsvn/viewcvs.php?view=rev&root=bf-blender&revision=14245
Author:   blendix
Date:     2008-03-26 16:25:56 +0100 (Wed, 26 Mar 2008)

Log Message:
-----------

Fix for bug #8750: depremul in the image texture code should check
with an epsilon rather than 0.0f, could give random spots otherwise
with e.g. calcalpha + negalpha.

Modified Paths:
--------------
    trunk/blender/source/blender/render/intern/source/imagetexture.c

Modified: trunk/blender/source/blender/render/intern/source/imagetexture.c
===================================================================
--- trunk/blender/source/blender/render/intern/source/imagetexture.c	2008-03-26 14:58:34 UTC (rev 14244)
+++ trunk/blender/source/blender/render/intern/source/imagetexture.c	2008-03-26 15:25:56 UTC (rev 14245)
@@ -32,6 +32,7 @@
 #include <string.h>
 #include <fcntl.h>
 #include <math.h>
+#include <float.h>
 #ifndef WIN32 
 #include <unistd.h>
 #else
@@ -245,7 +246,7 @@
 	if(tex->flag & TEX_NEGALPHA) texres->ta= 1.0f-texres->ta;
 
 	/* de-premul, this is being premulled in shade_input_do_shade() */
-	if(texres->ta!=1.0f && texres->ta!=0.0f) {
+	if(texres->ta!=1.0f && texres->ta>FLT_EPSILON) {
 		fx= 1.0f/texres->ta;
 		texres->tr*= fx;
 		texres->tg*= fx;
@@ -989,7 +990,7 @@
 	}
 	
 	/* de-premul, this is being premulled in shade_input_do_shade() */
-	if(texres->ta!=1.0f && texres->ta!=0.0f) {
+	if(texres->ta!=1.0f && texres->ta>FLT_EPSILON) {
 		fx= 1.0f/texres->ta;
 		texres->tr*= fx;
 		texres->tg*= fx;