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