Add dual source blending support for proper blending with coverage.
Review URL: http://codereview.appspot.com/4535088/
git-svn-id: http://skia.googlecode.com/svn/trunk@1390 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/GrGLInterface.cpp b/gpu/src/GrGLInterface.cpp
index 0825a3f..5ecf8eb 100644
--- a/gpu/src/GrGLInterface.cpp
+++ b/gpu/src/GrGLInterface.cpp
@@ -333,6 +333,15 @@
}
}
+ // Dual source blending
+ if (kDesktop_GrGLBinding == fBindingsExported &&
+ (has_gl_extension_from_string("GL_ARB_blend_func_extended", ext) ||
+ (3 < major) || (3 == major && 3 <= minor))) {
+ if (NULL == fBindFragDataLocationIndexed) {
+ return false;
+ }
+ }
+
return true;
}