50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
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/*
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* Copyright 2021 Google LLC
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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 "bench/Benchmark.h"
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#include "include/core/SkCanvas.h"
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class CanvasSaveRestoreBench : public Benchmark {
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public:
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CanvasSaveRestoreBench(int depth) : fDepth(depth) {
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fName.printf("canvas_save_restore_%d", fDepth);
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}
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protected:
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const char* onGetName() override { return fName.c_str(); }
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bool isSuitableFor(Backend backend) override { return backend == kRaster_Backend; }
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SkIPoint onGetSize() override { return { 1, 1 }; }
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void onDraw(int loops, SkCanvas* canvas) override {
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SkM44 m = SkM44::Rotate({0, 0, 1}, 1);
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for (int i = 0; i < loops; ++i) {
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for (int j = 0; j < fDepth; ++j) {
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canvas->save();
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canvas->concat(m);
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}
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canvas->drawColor(SkColors::kCyan);
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for (int j = 0; j < fDepth; ++j) {
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canvas->restore();
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}
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}
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}
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private:
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const int fDepth;
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SkString fName;
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using INHERITED = Benchmark;
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};
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// Performance remains roughly constant up to 32 (the number of preallocated save records).
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// After that, the cost of additional malloc/free calls starts to be measurable.
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DEF_BENCH( return new CanvasSaveRestoreBench(8);)
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DEF_BENCH( return new CanvasSaveRestoreBench(32);)
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DEF_BENCH( return new CanvasSaveRestoreBench(128);)
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DEF_BENCH( return new CanvasSaveRestoreBench(512);)
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