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 SkRecording_DEFINED 9 #define SkRecording_DEFINED 10 11 #include "SkCanvas.h" // SkCanvas 12 #include "SkRefCnt.h" // SkAutoTUnref 13 #include "SkTemplates.h" // SkAutoTDelete 14 #include "SkTypes.h" // SkNoncopyable 15 16 // These are intentionally left opaque. 17 class SkRecord; 18 class SkRecorder; 19 20 namespace EXPERIMENTAL { 21 22 /** Easy mode interface to SkRecord-based SkCanvas recording. 23 * 24 * scoped_ptr<SkRecording> recording(new SkRecording(1920, 1080)); 25 * skia::RefPtr<SkCanvas> canvas(skia::SharePtr(recording->canvas())); 26 * 27 * canvas->drawThis(); 28 * canvas->clipThat(); 29 * ... 30 * 31 * canvas.clear(); // You must deref the canvas before you may call releasePlayback(). 32 * scoped_ptr<const SkPlayback> playback(recording->releasePlayback()); 33 * playback->draw(&someCanvas); 34 * playback->draw(&someOtherCanvas); 35 * 36 * SkPlayback is thread safe; SkRecording is not. 37 */ 38 39 class SK_API SkPlayback : SkNoncopyable { 40 public: 41 // Remember, if you've got an SkPlayback*, you probably own it. Don't forget to delete it! 42 ~SkPlayback(); 43 44 // Draw recorded commands into a canvas. 45 void draw(SkCanvas*) const; 46 47 private: 48 explicit SkPlayback(const SkRecord*); 49 50 SkAutoTDelete<const SkRecord> fRecord; 51 52 friend class SkRecording; 53 }; 54 55 class SK_API SkRecording : SkNoncopyable { 56 public: 57 SkRecording(int width, int height); 58 ~SkRecording(); 59 60 // Draws issued to this canvas will be replayed by SkPlayback::draw(). 61 // Any refs held on canvas() must be dropped before you may call releasePlayback(). 62 SkCanvas* canvas(); 63 64 // Release exclusive ownership of an SkPlayback to the caller. 65 // Any refs held on canvas() must be dropped before you may call releasePlayback(). 66 SkPlayback* releasePlayback(); 67 68 private: 69 SkAutoTDelete<SkRecord> fRecord; 70 SkAutoTUnref<SkRecorder> fRecorder; 71 }; 72 73 } // namespace EXPERIMENTAL 74 75 #endif//SkRecording_DEFINED 76
