commit e63799d3fd4571202098a9d0dc02f582e9ec8f9d
author bsalomon@google.com <bsalomon@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> Wed Nov 09 14:14:38 2011 +0000
committer bsalomon@google.com <bsalomon@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> Wed Nov 09 14:14:38 2011 +0000
tree c293714cbf893b71917343c6159a544aaf00edad
parent 002af91302e35378ae9a7074291ce7645b947316

[GPU] when writing to unpremult dest and alpha is 0, make rgb=0

Review URL: http://codereview.appspot.com/5340062/


git-svn-id: http://skia.googlecode.com/svn/trunk@2640 2bbb7eff-a529-9590-31e7-b0007b416f81

src/gpu/GrGLProgram.cpp

diff --git a/src/gpu/GrGLProgram.cpp b/src/gpu/GrGLProgram.cpp
index 93303ca..28e4fc1 100644
--- a/src/gpu/GrGLProgram.cpp
+++ b/src/gpu/GrGLProgram.cpp
@@ -893,7 +893,8 @@
                         inCoverage.c_str(),
                         &segments.fFSCode);
         if (ProgramDesc::kNo_OutputPM == fProgramDesc.fOutputPM) {
-            segments.fFSCode.appendf("\t%s = vec4(%s.rgb / %s.a, %s.a);\n",
+            segments.fFSCode.appendf("\t%s = %s.a <= 0.0 ? vec4(0,0,0,0) : vec4(%s.rgb / %s.a, %s.a);\n",
+                                     fsColorOutput,
                                      fsColorOutput,
                                      fsColorOutput,
                                      fsColorOutput,