| // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SKIA_EXT_BENCHMARKING_CANVAS_H_ |
| #define SKIA_EXT_BENCHMARKING_CANVAS_H_ |
| |
| #include "base/compiler_specific.h" |
| #include "skia/ext/refptr.h" |
| #include "third_party/skia/include/utils/SkNWayCanvas.h" |
| #include "third_party/skia/src/utils/debugger/SkDebugCanvas.h" |
| |
| namespace skia { |
| |
| class TimingCanvas; |
| |
| class SK_API BenchmarkingCanvas : public SkNWayCanvas { |
| public: |
| BenchmarkingCanvas(int width, int height); |
| virtual ~BenchmarkingCanvas(); |
| |
| // Returns the number of draw commands executed on this canvas. |
| size_t CommandCount() const; |
| |
| // Get draw command info for a given index. |
| SkDrawCommand* GetCommand(size_t index); |
| |
| // Return the recorded render time (milliseconds) for a draw command index. |
| double GetTime(size_t index); |
| |
| private: |
| // In order to avoid introducing a Skia version dependency, this |
| // implementation dispatches draw commands in lock-step to two distinct |
| // canvases: |
| // * a SkDebugCanvas used for gathering command info and tracking |
| // the current command index |
| // * a SkiaTimingCanvas used for measuring raster paint times (and relying |
| // on the former for tracking the current command index). |
| // |
| // This way, if the SkCanvas API is extended, we don't need to worry about |
| // updating content::SkiaTimingCanvas to accurately override all new methods |
| // (to avoid timing info indices from getting out of sync), as SkDebugCanvas |
| // already does that for us. |
| |
| skia::RefPtr<SkDebugCanvas> debug_canvas_; |
| skia::RefPtr<TimingCanvas> timing_canvas_; |
| }; |
| |
| } |
| #endif // SKIA_EXT_BENCHMARKING_CANVAS_H |