SkTCopyOnFirstWrite-based SkPaintFilterCanvas API

src/utils/debugger/SkDebugCanvas.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkClipStack.h"
 #include "SkColorPriv.h"
 #include "SkDebugCanvas.h"
@@ skipping 51 matching lines @@
                            int height,
                            bool overdrawViz,
                            bool overrideFilterQuality,
                            SkFilterQuality quality)
         : INHERITED(width, height)
         , fOverdrawXfermode(overdrawViz ? new OverdrawXfermode : nullptr)
         , fOverrideFilterQuality(overrideFilterQuality)
         , fFilterQuality(quality) {}
 
 protected:
-    bool onFilter(const SkPaint* paint, Type, SkTLazy<SkPaint>* filteredPaint) const override {
-        if (paint) {
-            filteredPaint->set(*paint);
+    bool onFilter(SkTCopyOnFirstWrite<SkPaint>* paint, Type) const override {
+        if (*paint) {
             if (nullptr != fOverdrawXfermode.get()) {
-                filteredPaint->get()->setAntiAlias(false);
-                filteredPaint->get()->setXfermode(fOverdrawXfermode.get());
+                paint->writable()->setAntiAlias(false);
+                paint->writable()->setXfermode(fOverdrawXfermode.get());
             }
 
             if (fOverrideFilterQuality) {
-                filteredPaint->get()->setFilterQuality(fFilterQuality);
+                paint->writable()->setFilterQuality(fFilterQuality);
             }
         }
         return true;
     }
 
     void onDrawPicture(const SkPicture* picture,
                        const SkMatrix* matrix,
                        const SkPaint* paint) override {
         // We need to replay the picture onto this canvas in order to filter its internal paints.
         this->SkCanvas::onDrawPicture(picture, matrix, paint);
@@ skipping 570 matching lines @@
 }
 
 bool SkDebugCanvas::lastClipStackData(const SkPath& devPath) {
     if (fCalledAddStackData) {
         fClipStackData.appendf("<br>");
         addPathData(devPath, "pathOut");
         return true;
     }
     return false;
 }