Brian Osman | 310178c | 2021-07-27 13:16:09 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2021 Google LLC |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "bench/Benchmark.h" |
| 9 | #include "include/core/SkCanvas.h" |
| 10 | |
| 11 | class CanvasSaveRestoreBench : public Benchmark { |
| 12 | public: |
| 13 | CanvasSaveRestoreBench(int depth) : fDepth(depth) { |
| 14 | fName.printf("canvas_save_restore_%d", fDepth); |
| 15 | } |
| 16 | |
| 17 | protected: |
| 18 | const char* onGetName() override { return fName.c_str(); } |
| 19 | bool isSuitableFor(Backend backend) override { return backend == kRaster_Backend; } |
| 20 | SkIPoint onGetSize() override { return { 1, 1 }; } |
| 21 | |
| 22 | void onDraw(int loops, SkCanvas* canvas) override { |
| 23 | SkM44 m = SkM44::Rotate({0, 0, 1}, 1); |
| 24 | |
| 25 | for (int i = 0; i < loops; ++i) { |
| 26 | for (int j = 0; j < fDepth; ++j) { |
| 27 | canvas->save(); |
| 28 | canvas->concat(m); |
| 29 | } |
| 30 | canvas->drawColor(SkColors::kCyan); |
| 31 | for (int j = 0; j < fDepth; ++j) { |
| 32 | canvas->restore(); |
| 33 | } |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | private: |
| 38 | const int fDepth; |
| 39 | SkString fName; |
| 40 | |
| 41 | using INHERITED = Benchmark; |
| 42 | }; |
| 43 | |
| 44 | // Performance remains roughly constant up to 32 (the number of preallocated save records). |
| 45 | // After that, the cost of additional malloc/free calls starts to be measurable. |
| 46 | DEF_BENCH( return new CanvasSaveRestoreBench(8);) |
| 47 | DEF_BENCH( return new CanvasSaveRestoreBench(32);) |
| 48 | DEF_BENCH( return new CanvasSaveRestoreBench(128);) |
| 49 | DEF_BENCH( return new CanvasSaveRestoreBench(512);) |