Create fragment processor for performing input color blend with child processor

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 633 matching lines @@
     { color_modeproc,       CANNOT_USE_COEFF,       CANNOT_USE_COEFF },
     { luminosity_modeproc,  CANNOT_USE_COEFF,       CANNOT_USE_COEFF },
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 bool SkXfermode::asMode(Mode* mode) const {
     return false;
 }
 
-bool SkXfermode::asFragmentProcessor(GrFragmentProcessor**, GrProcessorDataManager*,
-                                     GrTexture*) const {
+bool SkXfermode::asFragmentProcessor(const GrFragmentProcessor**, GrProcessorDataManager*,
+                                     const GrFragmentProcessor*) const {
     return false;
 }
 
 bool SkXfermode::asXPFactory(GrXPFactory**) const {
     return false;
 }
 
 
 #if SK_SUPPORT_GPU
 #include "effects/GrPorterDuffXferProcessor.h"
@@ skipping 247 matching lines @@
                     }
                     dst[i] = SkToU8(A);
                 }
             }
         }
     }
 }
 
 #if SK_SUPPORT_GPU
 #include "effects/GrCustomXfermode.h"
+#include "effects/GrXfermodeFragmentProcessor.h"
 
-bool SkProcCoeffXfermode::asFragmentProcessor(GrFragmentProcessor** fp,
+bool SkProcCoeffXfermode::asFragmentProcessor(const GrFragmentProcessor** fp,
                                               GrProcessorDataManager* procDataManager,
-                                              GrTexture* background) const {
-    if (GrCustomXfermode::IsSupportedMode(fMode)) {
-        if (fp) {
-            SkASSERT(procDataManager);
-            *fp = GrCustomXfermode::CreateFP(procDataManager, fMode, background);
-            SkASSERT(*fp);
-        }
-        return true;
+                                              const GrFragmentProcessor* dst) const {
+    if (fp) {
+        SkASSERT(dst);
+        SkASSERT(procDataManager);
+        *fp = GrXfermodeFragmentProcessor::CreateFromDstProcessor(dst, fMode);
+        SkASSERT(*fp || kSrc_Mode == fMode);
     }
-    return false;
+    return true;
 }
 
 bool SkProcCoeffXfermode::asXPFactory(GrXPFactory** xp) const {
     if (CANNOT_USE_COEFF != fSrcCoeff) {
         if (xp) {
             *xp = GrPorterDuffXPFactory::Create(fMode);
             SkASSERT(*xp);
         }
         return true;
     }
@@ skipping 140 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