Fix GLPrograms test.

src/core/SkXfermode.cpp

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkXfermode.h"
@@ skipping 966 matching lines @@
             : GrGLEffect(factory ) {
         }
         virtual void emitCode(GrGLShaderBuilder* builder,
                               const GrDrawEffect& drawEffect,
                               EffectKey key,
                               const char* outputColor,
                               const char* inputColor,
                               const TextureSamplerArray& samplers) SK_OVERRIDE {
             const char* dstColorName = builder->dstColor();
             GrAssert(NULL != dstColorName);
-            builder->fsCodeAppendf("\t\t%s.a = 1.0 - (1.0 - %s.a) * (1.0 - %s.a);\n",
-                                   outputColor, dstColorName, inputColor);
-            builder->fsCodeAppendf("\t\t%s.rgb = min((1.0 - %s.a) * %s.rgb + %s.rgb,"
-                                                   " (1.0 - %s.a) * %s.rgb + %s.rgb);\n",
-                                   outputColor,
-                                   inputColor, dstColorName, inputColor,
-                                   dstColorName, inputColor, dstColorName);
+            if (NULL == inputColor){
+                // the input color is solid white
+                builder->fsCodeAppendf("\t\t%s.a = 1.0;\n", outputColor);
+                builder->fsCodeAppendf("\t\t%s.rgb = vec3(1.0, 1.0, 1.0) - %s.aaa + %s.rgb;\n",
+                                       outputColor, dstColorName, dstColorName);
+            } else {
+                builder->fsCodeAppendf("\t\t%s.a = 1.0 - (1.0 - %s.a) * (1.0 - %s.a);\n",
+                                       outputColor, dstColorName, inputColor);
+                builder->fsCodeAppendf("\t\t%s.rgb = min((1.0 - %s.a) * %s.rgb + %s.rgb,"
+                                                       " (1.0 - %s.a) * %s.rgb + %s.rgb);\n",
+                                       outputColor,
+                                       inputColor, dstColorName, inputColor,
+                                       dstColorName, inputColor, dstColorName);
+            }
         }
 
         static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&) { return 0; }
 
         virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE {}
 
     private:
         typedef GrGLEffect INHERITED;
     };
 
@@ skipping 601 matching lines @@
     return proc16;
 }
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkXfermode)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkProcCoeffXfermode)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkClearXfermode)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkSrcXfermode)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkDstInXfermode)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkDstOutXfermode)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END