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