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68 lines
1.8 KiB
68 lines
1.8 KiB
/* |
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* Copyright 2012 The Android Open Source Project |
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* |
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* Use of this source code is governed by a BSD-style license that can be |
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* found in the LICENSE file. |
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*/ |
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#include "Benchmark.h" |
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#include "SkBitmap.h" |
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#include "SkCanvas.h" |
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/** |
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* This bench mark tests the use case where the user writes the a canvas |
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* and then reads small chunks from it repeatedly. This can cause trouble |
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* for the GPU as readbacks are very expensive. |
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*/ |
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class ReadPixBench : public Benchmark { |
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public: |
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ReadPixBench() {} |
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protected: |
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const char* onGetName() override { |
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return "readpix"; |
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} |
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void onDraw(int loops, SkCanvas* canvas) override { |
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canvas->clear(SK_ColorBLACK); |
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SkISize size = canvas->getBaseLayerSize(); |
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int offX = (size.width() - kWindowSize) / kNumStepsX; |
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int offY = (size.height() - kWindowSize) / kNumStepsY; |
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SkPaint paint; |
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paint.setColor(SK_ColorBLUE); |
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canvas->drawCircle(SkIntToScalar(size.width()/2), |
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SkIntToScalar(size.height()/2), |
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SkIntToScalar(size.width()/2), |
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paint); |
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SkBitmap bitmap; |
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bitmap.allocPixels(SkImageInfo::MakeN32Premul(kWindowSize, kWindowSize)); |
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for (int i = 0; i < loops; i++) { |
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for (int x = 0; x < kNumStepsX; ++x) { |
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for (int y = 0; y < kNumStepsY; ++y) { |
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canvas->readPixels(bitmap.info(), bitmap.getPixels(), bitmap.rowBytes(), |
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x * offX, y * offY); |
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} |
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} |
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} |
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} |
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private: |
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static const int kNumStepsX = 30; |
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static const int kNumStepsY = 30; |
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static const int kWindowSize = 5; |
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typedef Benchmark INHERITED; |
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}; |
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//////////////////////////////////////////////////////////////////////////////// |
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DEF_BENCH( return new ReadPixBench(); )
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