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/include/GrGLDefines.h b/gpu/include/GrGLDefines.h
index 2e22803..6c2483b 100644
--- a/gpu/include/GrGLDefines.h
+++ b/gpu/include/GrGLDefines.h
@@ -69,6 +69,12 @@
/* GL_DST_ALPHA */
/* GL_ONE_MINUS_DST_ALPHA */
+/* ExtendedBlendFactors */
+#define GR_GL_SRC1_COLOR 0x88F9
+#define GR_GL_ONE_MINUS_SRC1_COLOR 0x88FA
+/* GL_SRC1_ALPHA */
+#define GR_GL_ONE_MINUS_SRC1_ALPHA 0x88FB
+
/* BlendEquationSeparate */
#define GR_GL_FUNC_ADD 0x8006
#define GR_GL_BLEND_EQUATION 0x8009