1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef SKIA_EXT_BENCHMARKING_CANVAS_H_ 6 #define SKIA_EXT_BENCHMARKING_CANVAS_H_ 7 8 #include "base/compiler_specific.h" 9 #include "skia/ext/refptr.h" 10 #include "third_party/skia/include/utils/SkNWayCanvas.h" 11 #include "third_party/skia/src/utils/debugger/SkDebugCanvas.h" 12 13 namespace skia { 14 15 class TimingCanvas; 16 17 class SK_API BenchmarkingCanvas : public SkNWayCanvas { 18 public: 19 BenchmarkingCanvas(int width, int height); 20 virtual ~BenchmarkingCanvas(); 21 22 // Returns the number of draw commands executed on this canvas. 23 size_t CommandCount() const; 24 25 // Get draw command info for a given index. 26 SkDrawCommand* GetCommand(size_t index); 27 28 // Return the recorded render time (milliseconds) for a draw command index. 29 double GetTime(size_t index); 30 31 private: 32 // In order to avoid introducing a Skia version dependency, this 33 // implementation dispatches draw commands in lock-step to two distinct 34 // canvases: 35 // * a SkDebugCanvas used for gathering command info and tracking 36 // the current command index 37 // * a SkiaTimingCanvas used for measuring raster paint times (and relying 38 // on the former for tracking the current command index). 39 // 40 // This way, if the SkCanvas API is extended, we don't need to worry about 41 // updating content::SkiaTimingCanvas to accurately override all new methods 42 // (to avoid timing info indices from getting out of sync), as SkDebugCanvas 43 // already does that for us. 44 45 skia::RefPtr<SkDebugCanvas> debug_canvas_; 46 skia::RefPtr<TimingCanvas> timing_canvas_; 47 }; 48 49 } 50 #endif // SKIA_EXT_BENCHMARKING_CANVAS_H 51
