Add support for serializing/deserializing of SkDrawable

src/core/SkPictureRecorder.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBigPicture.h"
 #include "SkData.h"
 #include "SkDrawable.h"
 #include "SkLayerInfo.h"
 #include "SkPictureRecorder.h"
 #include "SkPictureUtils.h"
 #include "SkRecord.h"
 #include "SkRecordDraw.h"
 #include "SkRecordOpts.h"
+#include "SkRecordedDrawable.h"
 #include "SkRecorder.h"
 #include "SkTypes.h"
 
 SkPictureRecorder::SkPictureRecorder() {
     fActivelyRecording = false;
     fRecorder.reset(new SkRecorder(nullptr, SkRect::MakeWH(0, 0), &fMiniRecorder));
 }
 
 SkPictureRecorder::~SkPictureRecorder() {}
 
@@ skipping 83 matching lines @@
     int drawableCount = 0;
     SkDrawable* const* drawables = nullptr;
     SkDrawableList* drawableList = fRecorder->getDrawableList();
     if (drawableList) {
         drawableCount = drawableList->count();
         drawables = drawableList->begin();
     }
     SkRecordDraw(*fRecord, canvas, nullptr, drawables, drawableCount, nullptr/*bbh*/, nullptr/*callback*/);
 }
 
-///////////////////////////////////////////////////////////////////////////////////////////////////
-
-class SkRecordedDrawable : public SkDrawable {
-    SkAutoTUnref<SkRecord>          fRecord;
-    SkAutoTUnref<SkBBoxHierarchy>   fBBH;
-    SkAutoTDelete<SkDrawableList>   fDrawableList;
-    const SkRect                    fBounds;
-    const bool                      fDoSaveLayerInfo;
-
-public:
-    SkRecordedDrawable(SkRecord* record, SkBBoxHierarchy* bbh, SkDrawableList* drawableList,
-                       const SkRect& bounds, bool doSaveLayerInfo)
-        : fRecord(SkRef(record))
-        , fBBH(SkSafeRef(bbh))
-        , fDrawableList(drawableList)   // we take ownership
-        , fBounds(bounds)
-        , fDoSaveLayerInfo(doSaveLayerInfo)
-    {}
-
-protected:
-    SkRect onGetBounds() override { return fBounds; }
-
-    void onDraw(SkCanvas* canvas) override {
-        SkDrawable* const* drawables = nullptr;
-        int drawableCount = 0;
-        if (fDrawableList) {
-            drawables = fDrawableList->begin();
-            drawableCount = fDrawableList->count();
-        }
-        SkRecordDraw(*fRecord, canvas, nullptr, drawables, drawableCount, fBBH, nullptr/*callback*/);
-    }
-
-    SkPicture* onNewPictureSnapshot() override {
-        SkBigPicture::SnapshotArray* pictList = nullptr;
-        if (fDrawableList) {
-            // TODO: should we plumb-down the BBHFactory and recordFlags from our host
-            //       PictureRecorder?
-            pictList = fDrawableList->newDrawableSnapshot();
-        }
-
-        SkAutoTUnref<SkLayerInfo> saveLayerData;
-        if (fBBH && fDoSaveLayerInfo) {
-            // TODO: can we avoid work by not allocating / filling these bounds?
-            SkAutoTMalloc<SkRect> scratchBounds(fRecord->count());
-            saveLayerData.reset(new SkLayerInfo);
-
-            SkRecordComputeLayers(fBounds, *fRecord, scratchBounds, pictList, saveLayerData);
-        }
-
-        size_t subPictureBytes = 0;
-        for (int i = 0; pictList && i < pictList->count(); i++) {
-            subPictureBytes += SkPictureUtils::ApproximateBytesUsed(pictList->begin()[i]);
-        }
-        // SkBigPicture will take ownership of a ref on both fRecord and fBBH.
-        // We're not willing to give up our ownership, so we must ref them for SkPicture.
-        return new SkBigPicture(fBounds, SkRef(fRecord.get()), pictList, SkSafeRef(fBBH.get()),
-                                saveLayerData.release(), subPictureBytes);
-    }
-};
-
 sk_sp<SkDrawable> SkPictureRecorder::finishRecordingAsDrawable() {
     fActivelyRecording = false;
     fRecorder->flushMiniRecorder();
     fRecorder->restoreToCount(1);  // If we were missing any restores, add them now.
 
     // TODO: delay as much of this work until just before first playback?
     SkRecordOptimize(fRecord);
 
     if (fBBH.get()) {
         SkAutoTMalloc<SkRect> bounds(fRecord->count());
         SkRecordFillBounds(fCullRect, *fRecord, bounds);
         fBBH->insert(bounds, fRecord->count());
     }
 
     sk_sp<SkDrawable> drawable =
            sk_make_sp<SkRecordedDrawable>(fRecord, fBBH, fRecorder->detachDrawableList(), fCullRect,
                                    SkToBool(fFlags & kComputeSaveLayerInfo_RecordFlag));
 
     // release our refs now, so only the drawable will be the owner.
     fRecord.reset(nullptr);
     fBBH.reset(nullptr);
 
     return drawable;
 }