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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Benchmark.h"
#include "SkCanvas.h"
#include "SkImage.h"
#include "SkPaint.h"
#include "SkSurface.h"
class GrMipMapBench: public Benchmark {
sk_sp<SkSurface> fSurface;
SkString fName;
const int fW, fH;
public:
GrMipMapBench(int w, int h) : fW(w), fH(h) {
fName.printf("gr_mipmap_build_%dx%d", w, h);
}
protected:
bool isSuitableFor(Backend backend) override {
return kGPU_Backend == backend;
}
const char* onGetName() override { return fName.c_str(); }
void onDraw(int loops, SkCanvas* canvas) override {
if (!fSurface) {
GrContext* context = canvas->getGrContext();
if (nullptr == context) {
return;
}
auto srgb = SkColorSpace::MakeSRGB();
SkImageInfo info =
SkImageInfo::Make(fW, fH, kRGBA_8888_SkColorType, kPremul_SkAlphaType, srgb);
// We're benching the regeneration of the mip levels not the need to allocate them every
// frame. Thus we create the surface with mips to begin with.
fSurface = SkSurface::MakeRenderTarget(context, SkBudgeted::kNo, info, 0,
kBottomLeft_GrSurfaceOrigin, nullptr, true);
}
// Clear surface once:
fSurface->getCanvas()->clear(SK_ColorBLACK);
SkPaint paint;
paint.setFilterQuality(kMedium_SkFilterQuality);
paint.setColor(SK_ColorWHITE);
for (int i = 0; i < loops; i++) {
// Touch surface so mips are dirtied
fSurface->getCanvas()->drawPoint(0, 0, paint);
// Draw reduced version of surface to original canvas, to trigger mip generation
canvas->save();
canvas->scale(0.1f, 0.1f);
canvas->drawImage(fSurface->makeImageSnapshot(), 0, 0, &paint);
canvas->restore();
}
}
void onPerCanvasPostDraw(SkCanvas*) override {
fSurface.reset(nullptr);
}
private:
typedef Benchmark INHERITED;
};
// Build variants that exercise the width and heights being even or odd at each level, as the
// impl specializes on each of these.
//
DEF_BENCH( return new GrMipMapBench(511, 511); )
DEF_BENCH( return new GrMipMapBench(512, 511); )
DEF_BENCH( return new GrMipMapBench(511, 512); )
DEF_BENCH( return new GrMipMapBench(512, 512); )
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