Add SkRasterPipeline blitter.

src/core/SkBlitter.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 "SkBlitter.h"
 #include "SkAntiRun.h"
 #include "SkColor.h"
@@ skipping 835 matching lines @@
     if (SkXfermode::IsMode(mode, SkXfermode::kClear_Mode)) {
         SkPaint* p = paint.writable();
         p->setShader(nullptr);
         shader = nullptr;
         p->setColorFilter(nullptr);
         cf = nullptr;
         mode = p->setXfermodeMode(SkXfermode::kSrc_Mode);
         p->setColor(0);
     }
 
+    if (SkBlitter* blitter = SkCreateRasterPipelineBlitter(device, *paint, allocator)) {
+        return blitter;
+    }
+
     if (nullptr == shader) {
         if (mode) {
             // xfermodes (and filters) require shaders for our current blitters
             paint.writable()->setShader(SkShader::MakeColorShader(paint->getColor()));
             paint.writable()->setAlpha(0xFF);
             shader = paint->getShader();
         } else if (cf) {
             // if no shader && no xfermode, we just apply the colorfilter to
             // our color and move on.
             SkPaint* writablePaint = paint.writable();
@@ skipping 139 matching lines @@
     fShaderContext->~Context();
     SkShader::Context* ctx = fShader->createContext(rec, (void*)fShaderContext);
     if (nullptr == ctx) {
         // Need a valid context in fShaderContext's storage, so we can later (or our caller) call
         // the in-place destructor.
         new (fShaderContext) SkZeroShaderContext(*fShader, rec);
         return false;
     }
     return true;
 }