75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
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/*
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* Copyright 2018 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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// This benchmark attempts to measure the time to do a fullscreen clear, an axis-aligned partial
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// clear, and a clear restricted to an axis-aligned rounded rect. The fullscreen and axis-aligned
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// partial clears on the GPU should follow a fast path that maps to backend-specialized clear
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// operations, whereas the rounded-rect clear cannot be.
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#include "Benchmark.h"
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#include "SkCanvas.h"
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#include "SkPaint.h"
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#include "SkRect.h"
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#include "SkRRect.h"
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class ClearBench : public Benchmark {
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public:
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enum ClearType {
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kFull_ClearType,
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kPartial_ClearType,
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kComplex_ClearType
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};
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ClearBench(ClearType type) : fType(type) {}
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protected:
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const char* onGetName() override {
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switch(fType) {
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case kFull_ClearType:
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return "Clear-Full";
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case kPartial_ClearType:
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return "Clear-Partial";
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case kComplex_ClearType:
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return "Clear-Complex";
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}
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SkASSERT(false);
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return "Unreachable";
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}
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void onDraw(int loops, SkCanvas* canvas) override {
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const SkColor color = SK_ColorBLUE;
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const SkRect partialClip = SkRect::MakeLTRB(50, 50, 400, 400);
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const SkRRect complexClip = SkRRect::MakeRectXY(partialClip, 15, 15);
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// TODO (michaelludwig): Any benefit to changing the clip geometry?
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for (int i = 0; i < loops; i++) {
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canvas->save();
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switch(fType) {
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case kPartial_ClearType:
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canvas->clipRect(partialClip);
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break;
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case kComplex_ClearType:
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canvas->clipRRect(complexClip);
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break;
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case kFull_ClearType:
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// Don't add any extra clipping, since it defaults to the entire "device"
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break;
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}
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canvas->clear(color);
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canvas->restore();
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}
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}
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private:
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ClearType fType;
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};
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DEF_BENCH( return new ClearBench(ClearBench::kFull_ClearType); )
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DEF_BENCH( return new ClearBench(ClearBench::kPartial_ClearType); )
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DEF_BENCH( return new ClearBench(ClearBench::kComplex_ClearType); )
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