6c22573edb
patch from issue 325733002 TBR=scroggo Author: reed@chromium.org Review URL: https://codereview.chromium.org/322963002
68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
|
|
/*
|
|
* Copyright 2012 The Android Open Source Project
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
#include "SkBenchmark.h"
|
|
#include "SkCanvas.h"
|
|
|
|
|
|
/**
|
|
* This bench mark tests the use case where the user writes the a canvas
|
|
* and then reads small chunks from it repeatedly. This can cause trouble
|
|
* for the GPU as readbacks are very expensive.
|
|
*/
|
|
class ReadPixBench : public SkBenchmark {
|
|
public:
|
|
ReadPixBench() {}
|
|
|
|
protected:
|
|
virtual const char* onGetName() SK_OVERRIDE {
|
|
return "readpix";
|
|
}
|
|
|
|
virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
|
|
canvas->clear(SK_ColorBLACK);
|
|
|
|
SkISize size = canvas->getDeviceSize();
|
|
|
|
int offX = (size.width() - kWindowSize) / kNumStepsX;
|
|
int offY = (size.height() - kWindowSize) / kNumStepsY;
|
|
|
|
SkPaint paint;
|
|
|
|
paint.setColor(SK_ColorBLUE);
|
|
|
|
canvas->drawCircle(SkIntToScalar(size.width()/2),
|
|
SkIntToScalar(size.height()/2),
|
|
SkIntToScalar(size.width()/2),
|
|
paint);
|
|
|
|
SkBitmap bitmap;
|
|
|
|
bitmap.setInfo(SkImageInfo::MakeN32Premul(kWindowSize, kWindowSize));
|
|
|
|
for (int i = 0; i < loops; i++) {
|
|
for (int x = 0; x < kNumStepsX; ++x) {
|
|
for (int y = 0; y < kNumStepsY; ++y) {
|
|
canvas->readPixels(&bitmap, x * offX, y * offY);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private:
|
|
static const int kNumStepsX = 30;
|
|
static const int kNumStepsY = 30;
|
|
static const int kWindowSize = 5;
|
|
|
|
typedef SkBenchmark INHERITED;
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
DEF_BENCH( return new ReadPixBench(); )
|