Add XferProcessor factory in GrPaint and GrDrawState.

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 "GrXferProcessor.h"
 #include "SkXfermode.h"
 #include "SkXfermode_opts_SSE2.h"
 #include "SkXfermode_proccoeff.h"
 #include "SkColorPriv.h"
 #include "SkLazyPtr.h"
 #include "SkMathPriv.h"
 #include "SkReadBuffer.h"
 #include "SkString.h"
 #include "SkUtilsArm.h"
 #include "SkWriteBuffer.h"
@@ skipping 653 matching lines @@
 }
 
 bool SkXfermode::asMode(Mode* mode) const {
     return false;
 }
 
 bool SkXfermode::asFragmentProcessor(GrFragmentProcessor**, GrTexture*) const {
     return false;
 }
 
-bool SkXfermode::asFragmentProcessorOrCoeff(SkXfermode* xfermode, GrFragmentProcessor** fp,
-                                            Coeff* src, Coeff* dst, GrTexture* background) {
+bool SkXfermode::asXPFactory(GrXPFactory**) const {
+    return false;
+}
+
+bool SkXfermode::asFragmentProcessorOrXPFactoryOrCoeff(SkXfermode* xfermode,
+                                                       GrFragmentProcessor** fp,
+                                                       GrXPFactory** xpf,
+                                                       Coeff* src, Coeff* dst,
+                                                       GrTexture* background) {
     if (NULL == xfermode) {
         return ModeAsCoeff(kSrcOver_Mode, src, dst);
     } else if (xfermode->asCoeff(src, dst)) {
         return true;
+    } else if (NULL == background && xfermode->asXPFactory(xpf)) {
+        return true;
     } else {
         return xfermode->asFragmentProcessor(fp, background);
     }
 }
 
 SkPMColor SkXfermode::xferColor(SkPMColor src, SkPMColor dst) const{
     // no-op. subclasses should override this
     return dst;
 }
 
@@ skipping 1255 matching lines @@
         } else {
             proc16 = rec.fProc16_General;
         }
     }
     return proc16;
 }
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkXfermode)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkProcCoeffXfermode)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END