Line data    Source code

       1             : /*
       2             :  * Copyright 2014 Google Inc.
       3             :  *
       4             :  * Use of this source code is governed by a BSD-style license that can be
       5             :  * found in the LICENSE file.
       6             :  */
       7             : 
       8             : #ifndef SkPicturePlayback_DEFINED
       9             : #define SkPicturePlayback_DEFINED
      10             : 
      11             : #include "SkPictureFlat.h"  // for DrawType
      12             : 
      13             : class SkBitmap;
      14             : class SkCanvas;
      15             : class SkPaint;
      16             : class SkPictureData;
      17             : 
      18             : // The basic picture playback class replays the provided picture into a canvas.
      19             : class SkPicturePlayback final : SkNoncopyable {
      20             : public:
      21           0 :     SkPicturePlayback(const SkPictureData* data)
      22           0 :         : fPictureData(data)
      23           0 :         , fCurOffset(0) {
      24           0 :     }
      25             : 
      26             :     void draw(SkCanvas* canvas, SkPicture::AbortCallback*, SkReadBuffer* buffer);
      27             : 
      28             :     // TODO: remove the curOp calls after cleaning up GrGatherDevice
      29             :     // Return the ID of the operation currently being executed when playing
      30             :     // back. 0 indicates no call is active.
      31             :     size_t curOpID() const { return fCurOffset; }
      32           0 :     void resetOpID() { fCurOffset = 0; }
      33             : 
      34             : protected:
      35             :     const SkPictureData* fPictureData;
      36             : 
      37             :     // The offset of the current operation when within the draw method
      38             :     size_t fCurOffset;
      39             : 
      40             :     void handleOp(SkReadBuffer* reader,
      41             :                   DrawType op,
      42             :                   uint32_t size,
      43             :                   SkCanvas* canvas,
      44             :                   const SkMatrix& initialMatrix);
      45             : 
      46             :     static DrawType ReadOpAndSize(SkReadBuffer* reader, uint32_t* size);
      47             : 
      48             :     class AutoResetOpID {
      49             :     public:
      50           0 :         AutoResetOpID(SkPicturePlayback* playback) : fPlayback(playback) { }
      51           0 :         ~AutoResetOpID() {
      52           0 :             if (fPlayback) {
      53           0 :                 fPlayback->resetOpID();
      54             :             }
      55           0 :         }
      56             : 
      57             :     private:
      58             :         SkPicturePlayback* fPlayback;
      59             :     };
      60             : 
      61             : private:
      62             :     typedef SkNoncopyable INHERITED;
      63             : };
      64             : 
      65             : #endif