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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef WrappedBenchmark_DEFINED
#define WrappedBenchmark_DEFINED
#include "Benchmark.h"
#include "SkSurface.h"
#include "GrContext.h"
#include "GrDrawContext.h"
#include "GrRenderTarget.h"
// Wrap some other benchmark to allow specialization to either
// cpu or gpu backends. The derived class will override 'setupOffScreen'
// to create an offscreen surface in which the actual rendering will occur.
class WrappedBenchmark : public Benchmark {
public:
// Takes ownership of caller's ref on `bench`.
explicit WrappedBenchmark(const SkSurfaceProps& surfaceProps, Benchmark* bench)
: fSurfaceProps(surfaceProps)
, fBench(bench) {}
const SkSurfaceProps& surfaceProps() const { return fSurfaceProps; }
const char* onGetName() override { return fBench->getName(); }
const char* onGetUniqueName() override { return fBench->getUniqueName(); }
void onDelayedSetup() override { fBench->delayedSetup(); }
void onPerCanvasPreDraw(SkCanvas* canvas) override {
this->setupOffScreen(canvas);
fOffScreen->getCanvas()->clear(SK_ColorWHITE);
fBench->perCanvasPreDraw(fOffScreen->getCanvas());
}
void onPreDraw(SkCanvas* canvas) override {
SkASSERT(fOffScreen);
fBench->preDraw(fOffScreen->getCanvas());
}
void onPostDraw(SkCanvas* canvas) override {
SkASSERT(fOffScreen);
fBench->postDraw(fOffScreen->getCanvas());
}
void onPerCanvasPostDraw(SkCanvas* canvas) override {
SkASSERT(fOffScreen);
fBench->perCanvasPostDraw(fOffScreen->getCanvas());
}
void onDraw(int loops, SkCanvas* canvas) override {
SkASSERT(fOffScreen);
fBench->draw(loops, fOffScreen->getCanvas());
this->blitToScreen(canvas);
}
virtual SkIPoint onGetSize() override { return fBench->getSize(); }
protected:
virtual void setupOffScreen(SkCanvas*)=0;
void blitToScreen(SkCanvas* canvas) {
int w = SkTMin(fBench->getSize().fX, fOffScreen->width());
int h = SkTMin(fBench->getSize().fY, fOffScreen->width());
this->onBlitToScreen(canvas, w, h);
}
virtual void onBlitToScreen(SkCanvas* canvas, int w, int h) = 0;
SkSurfaceProps fSurfaceProps;
sk_sp<SkSurface> fOffScreen;
SkAutoTUnref<Benchmark> fBench;
};
// Create a raster surface for off screen rendering
class CpuWrappedBenchmark : public WrappedBenchmark {
public:
explicit CpuWrappedBenchmark(const SkSurfaceProps& surfaceProps, Benchmark* bench)
: INHERITED(surfaceProps, bench) {}
private:
void setupOffScreen(SkCanvas* canvas) override {
fOffScreen = SkSurface::MakeRaster(canvas->imageInfo(), &this->surfaceProps());
}
void onBlitToScreen(SkCanvas* canvas, int w, int h) override {
sk_sp<SkImage> image(fOffScreen->makeImageSnapshot());
SkPaint blitPaint;
blitPaint.setXfermodeMode(SkXfermode::kSrc_Mode);
canvas->drawImageRect(image.get(), SkIRect::MakeWH(w, h),
SkRect::MakeWH(SkIntToScalar(w), SkIntToScalar(h)), &blitPaint);
}
typedef WrappedBenchmark INHERITED;
};
// Create an MSAA & NVPR-enabled GPU backend
class GpuWrappedBenchmark : public WrappedBenchmark {
public:
explicit GpuWrappedBenchmark(const SkSurfaceProps& surfaceProps, Benchmark* bench,
int numSamples)
: INHERITED(surfaceProps, bench)
, fNumSamples(numSamples) {}
private:
void setupOffScreen(SkCanvas* canvas) override {
fOffScreen = SkSurface::MakeRenderTarget(canvas->getGrContext(),
SkBudgeted::kNo,
canvas->imageInfo(),
fNumSamples,
&this->surfaceProps());
}
void onBlitToScreen(SkCanvas* canvas, int w, int h) override {
// We call copySurface directly on the underlying GPU surfaces for a more efficient blit.
GrDrawContext* dstDC = canvas->internal_private_accessTopLayerDrawContext();
SkASSERT(dstDC);
GrDrawContext* srcDC =
fOffScreen->getCanvas()->internal_private_accessTopLayerDrawContext();
SkASSERT(srcDC);
GrRenderTarget* src = srcDC->accessRenderTarget();
SkASSERT(src);
SkASSERT(canvas->getGrContext() == fOffScreen->getCanvas()->getGrContext());
dstDC->copySurface(src, SkIRect::MakeWH(w, h), SkIPoint::Make(0, 0));
}
int fNumSamples;
typedef WrappedBenchmark INHERITED;
};
#endif //WrappedBenchmark_DEFINED
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