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 SkPicture::OperationList& getActiveOps(const SkIRect& queryRect);
+
     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;
 
+    class CachedOperationList : public SkPicture::OperationList {
+    public:
+        CachedOperationList() {
+            fCacheQueryRect.setEmpty();
+        }
+
+        virtual bool valid() const { return true; }
+        virtual int numOps() const SK_OVERRIDE { return fOps.count(); }
+        virtual uint32_t offset(int index) const SK_OVERRIDE;
+        virtual const SkMatrix& matrix(int index) const SK_OVERRIDE;
+
+        // The query rect for which the cached active ops are valid
+        SkIRect          fCacheQueryRect;
+
+        // The operations which are active within 'fCachedQueryRect'
+        SkTDArray<void*> fOps;
+
+    private:
+        typedef SkPicture::OperationList INHERITED;
+    };
+
+    CachedOperationList* fCachedActiveOps;
+
     SkTypefacePlayback fTFPlayback;
     SkFactoryPlayback* fFactoryPlayback;
 #ifdef SK_BUILD_FOR_ANDROID
     SkMutex fDrawMutex;
     bool fAbortCurrentPlayback;
 #endif
 };
 
 #endif