3661bc9976
BUG=skia: Change-Id: I42d4ca92897bde5bd8e0575a0104b12b83134cef Reviewed-on: https://skia-review.googlesource.com/8852 Reviewed-by: Cary Clark <caryclark@google.com> Commit-Queue: Mike Reed <reed@google.com>
67 lines
1.7 KiB
C++
67 lines
1.7 KiB
C++
/*
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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 "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.setInfo(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, 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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