skia2/bench/ReadPixBench.cpp
Florin Malita ab244f045a Revert "Revert "Reland: Remove SkLights include from SkCanvas.h""
This reverts commit 9d5f66d9c2.

Reason for revert: Leon landed Android fixes.

Original change's description:
> Revert "Reland: Remove SkLights include from SkCanvas.h"
> 
> This reverts commit fed00319c9.
> 
> Reason for revert: breaking the Android roll.
> 
> Original change's description:
> > Reland: Remove SkLights include from SkCanvas.h
> > 
> > SkLights.h pulls in a bunch of other headers and is not needed (fwdecl
> > works fine).
> > 
> > Change-Id: I3ed97cd7861e51dcb7cfa7950a97b420dbc6fbfb
> > TBR=reed@google.com
> > Reviewed-on: https://skia-review.googlesource.com/15143
> > Commit-Queue: Florin Malita <fmalita@chromium.org>
> > Reviewed-by: Florin Malita <fmalita@chromium.org>
> > 
> 
> TBR=fmalita@chromium.org,reed@google.com
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> 
> Change-Id: I3b0e69f1d04d160f16a5567b09982d35cc9ca84e
> Reviewed-on: https://skia-review.googlesource.com/15195
> Reviewed-by: Florin Malita <fmalita@chromium.org>
> Commit-Queue: Florin Malita <fmalita@chromium.org>
> 

TBR=msarett@google.com,reviews@skia.org,fmalita@chromium.org,reed@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: I0a1c2f9df61f16987ab72dfb4f3a205fbcc37667
Reviewed-on: https://skia-review.googlesource.com/15229
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>
2017-05-03 19:17:11 +00:00

69 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 "Benchmark.h"
#include "SkBitmap.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 Benchmark {
public:
ReadPixBench() {}
protected:
const char* onGetName() override {
return "readpix";
}
void onDraw(int loops, SkCanvas* canvas) override {
canvas->clear(SK_ColorBLACK);
SkISize size = canvas->getBaseLayerSize();
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.allocPixels(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.info(), bitmap.getPixels(), bitmap.rowBytes(),
x * offX, y * offY);
}
}
}
}
private:
static const int kNumStepsX = 30;
static const int kNumStepsY = 30;
static const int kWindowSize = 5;
typedef Benchmark INHERITED;
};
////////////////////////////////////////////////////////////////////////////////
DEF_BENCH( return new ReadPixBench(); )