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/*
* Copyright 2013 Google Inc.
*
* 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"
#include "SkPaint.h"
#include "SkRandom.h"
#include "SkString.h"
#include "SkXfermode.h"
// Benchmark that draws non-AA rects with an SkXfermode::Mode
class XfermodeBench : public SkBenchmark {
public:
XfermodeBench(void* param, SkXfermode::Mode mode) : SkBenchmark(param) {
fXfermode.reset(SkXfermode::Create(mode));
SkASSERT(NULL != fXfermode.get() || SkXfermode::kSrcOver_Mode == mode);
fName.printf("Xfermode_%s", SkXfermode::ModeName(mode));
}
protected:
virtual const char* onGetName() SK_OVERRIDE { return fName.c_str(); }
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
SkISize size = canvas->getDeviceSize();
SkMWCRandom random;
for (int i = 0; i < kNumRects; ++i) {
SkPaint paint;
paint.setXfermode(fXfermode.get());
paint.setColor(random.nextU());
SkScalar w = random.nextRangeScalar(SkIntToScalar(kMinSize), SkIntToScalar(kMaxSize));
SkScalar h = random.nextRangeScalar(SkIntToScalar(kMinSize), SkIntToScalar(kMaxSize));
SkRect rect = SkRect::MakeXYWH(
random.nextUScalar1() * (size.fWidth - w),
random.nextUScalar1() * (size.fHeight - h),
w,
h
);
canvas->drawRect(rect, paint);
}
}
private:
enum {
kNumRects = SkBENCHLOOP(1000),
kMinSize = 10,
kMaxSize = 400,
};
SkAutoTUnref<SkXfermode> fXfermode;
SkString fName;
typedef SkBenchmark INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
// These modes were chosen because they are expected to be successively harder for the GPU.
// kSrc can disable blending, kSrcOver cannot, kDarken requires reading the dst pixel in the shader.
static SkBenchmark* Fact0(void* p) { return new XfermodeBench(p, SkXfermode::kSrc_Mode); }
static SkBenchmark* Fact1(void* p) { return new XfermodeBench(p, SkXfermode::kSrcOver_Mode); }
static SkBenchmark* Fact2(void* p) { return new XfermodeBench(p, SkXfermode::kDarken_Mode); }
static BenchRegistry gReg0(Fact0);
static BenchRegistry gReg1(Fact1);
static BenchRegistry gReg2(Fact2);
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