Don't create a GXPFactory when blend is SrcOver

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"
 #include "SkXfermode_proccoeff.h"
@@ skipping 642 matching lines @@
 
 bool SkXfermode::asFragmentProcessor(const GrFragmentProcessor**,
                                      const GrFragmentProcessor*) const {
     return false;
 }
 
 bool SkXfermode::asXPFactory(GrXPFactory**) const {
     return false;
 }
 
-
-#if SK_SUPPORT_GPU
-#include "effects/GrPorterDuffXferProcessor.h"
-
-bool SkXfermode::AsXPFactory(SkXfermode* xfermode, GrXPFactory** xpf) {
-    if (nullptr == xfermode) {
-        if (xpf) {
-            *xpf = GrPorterDuffXPFactory::Create(kSrcOver_Mode);
-        }
-        return true;
-    } else {
-        return xfermode->asXPFactory(xpf);
-    }
-}
-#else
-bool SkXfermode::AsXPFactory(SkXfermode* xfermode, GrXPFactory** xpf) {
-    return false;
-}
-#endif
-
 SkPMColor SkXfermode::xferColor(SkPMColor src, SkPMColor dst) const{
     // no-op. subclasses should override this
     return dst;
 }
 
 void SkXfermode::xfer32(SkPMColor* SK_RESTRICT dst,
                         const SkPMColor* SK_RESTRICT src, int count,
                         const SkAlpha* SK_RESTRICT aa) const {
     SkASSERT(dst && src && count >= 0);
 
@@ skipping 220 matching lines @@
                     }
                     dst[i] = SkToU8(A);
                 }
             }
         }
     }
 }
 
 #if SK_SUPPORT_GPU
 #include "effects/GrCustomXfermode.h"
+#include "effects/GrPorterDuffXferProcessor.h"
 #include "effects/GrXfermodeFragmentProcessor.h"
 
 bool SkProcCoeffXfermode::asFragmentProcessor(const GrFragmentProcessor** fp,
                                               const GrFragmentProcessor* dst) const {
     if (fp) {
         SkASSERT(dst);
         *fp = GrXfermodeFragmentProcessor::CreateFromDstProcessor(dst, fMode);
         SkASSERT(*fp || kSrc_Mode == fMode);
     }
     return true;
@@ skipping 150 matching lines @@
     if (!xfer) {
         return SkXfermode::kOpaque_SrcColorOpacity == opacityType;
     }
 
     return xfer->isOpaque(opacityType);
 }
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkXfermode)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkProcCoeffXfermode)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END