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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef GraphicsContextRecorder_h
     32 #define GraphicsContextRecorder_h
     33 
     34 #include "platform/JSONValues.h"
     35 #include "platform/PlatformExport.h"
     36 #include "platform/graphics/GraphicsContext.h"
     37 #include "third_party/skia/include/core/SkPicture.h"
     38 #include "third_party/skia/include/core/SkPictureRecorder.h"
     39 #include "wtf/RefCounted.h"
     40 
     41 namespace WebCore {
     42 
     43 class PLATFORM_EXPORT GraphicsContextSnapshot : public RefCounted<GraphicsContextSnapshot> {
     44 WTF_MAKE_NONCOPYABLE(GraphicsContextSnapshot);
     45 public:
     46     typedef Vector<Vector<double> > Timings;
     47 
     48     static PassRefPtr<GraphicsContextSnapshot> load(const char*, size_t);
     49 
     50     PassOwnPtr<ImageBuffer> replay(unsigned fromStep = 0, unsigned toStep = 0) const;
     51     PassOwnPtr<Timings> profile(unsigned minIterations, double minDuration) const;
     52     PassRefPtr<JSONArray> snapshotCommandLog() const;
     53 
     54 private:
     55     friend class GraphicsContextRecorder;
     56     GraphicsContextSnapshot(PassRefPtr<SkPicture>, bool isCerteainlyOpaque);
     57 
     58     PassOwnPtr<ImageBuffer> createImageBuffer() const;
     59 
     60     RefPtr<SkPicture> m_picture;
     61     bool m_isCertainlyOpaque;
     62 };
     63 
     64 class PLATFORM_EXPORT GraphicsContextRecorder {
     65 WTF_MAKE_NONCOPYABLE(GraphicsContextRecorder);
     66 public:
     67     GraphicsContextRecorder() { }
     68     GraphicsContext* record(const IntSize&, bool isCertainlyOpaque);
     69     PassRefPtr<GraphicsContextSnapshot> stop();
     70 
     71 private:
     72     RefPtr<SkPicture> m_picture;
     73     OwnPtr<GraphicsContext> m_context;
     74     OwnPtr<SkPictureRecorder> m_recorder;
     75     bool m_isCertainlyOpaque;
     76 };
     77 
     78 }
     79 
     80 #endif // GraphicsContextRecorder_h
     81