Add a means of extracting active operations from SkPicture

src/core/SkPicturePlayback.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkPicturePlayback_DEFINED
 #define SkPicturePlayback_DEFINED
 
@@ skipping 67 matching lines @@
 public:
     SkPicturePlayback();
     SkPicturePlayback(const SkPicturePlayback& src, SkPictCopyInfo* deepCopyInfo = NULL);
     explicit SkPicturePlayback(const SkPictureRecord& record, bool deepCopy = false);
     static SkPicturePlayback* CreateFromStream(SkStream*, const SkPictInfo&,
                                                SkPicture::InstallPixelRefProc);
     static SkPicturePlayback* CreateFromBuffer(SkReadBuffer&);
 
     virtual ~SkPicturePlayback();
 
+    const SkTDArray<void*>* getActiveOps(const SkIRect& queryRect);

[bsalomon, 2014/03/13 17:59:34]

The signature seems a little dangerous to me.

[robertphillips, 2014/03/14 17:59:34]

Done. I think I have addressed your concerns here. PTAL.

+
     void draw(SkCanvas& canvas, SkDrawPictureCallback*);
 
     void serialize(SkWStream*, SkPicture::EncodeBitmap) const;
     void flatten(SkWriteBuffer&) const;
 
     void dumpSize() const;
 
     bool containsBitmaps() const;
 
 #ifdef SK_BUILD_FOR_ANDROID
     // Can be called in the middle of playback (the draw() call). WIll abort the
     // drawing and return from draw() after the "current" op code is done
     void abort() { fAbortCurrentPlayback = true; }
 #endif
 
 protected:
     bool parseStream(SkStream*, const SkPictInfo&,
                      SkPicture::InstallPixelRefProc);
     bool parseBuffer(SkReadBuffer& buffer);
 #ifdef SK_DEVELOPER
     virtual bool preDraw(int opIndex, int type);
     virtual void postDraw(int opIndex);
 #endif
 
-    void preLoadBitmaps(const SkTDArray<void*>& results);
+    void preLoadBitmaps(const SkTDArray<void*>* results);
 
 private:
     class TextContainer {
     public:
         size_t length() { return fByteLength; }
         const void* text() { return (const void*) fText; }
         size_t fByteLength;
         const char* fText;
     };
 
@@ skipping 107 matching lines @@
 
     SkData* fOpData;    // opcodes and parameters
     SkAutoTUnref<SkOffsetTable> fBitmapUseOffsets;
 
     SkPicture** fPictureRefs;
     int fPictureCount;
 
     SkBBoxHierarchy* fBoundingHierarchy;
     SkPictureStateTree* fStateTree;
 
+    // The query rect for which the cached active ops are valid
+    SkIRect           fCacheQueryRect;
+    // The operations which are active within 'fCachedQueryRect'
+    SkTDArray<void*>* fCachedActiveOps;
+
     SkTypefacePlayback fTFPlayback;
     SkFactoryPlayback* fFactoryPlayback;
 #ifdef SK_BUILD_FOR_ANDROID
     SkMutex fDrawMutex;
     bool fAbortCurrentPlayback;
 #endif
 };
 
 #endif