Chris Dalton | cb72722 | 2017-06-30 12:00:35 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017 Google Inc. |
| 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 "Benchmark.h" |
| 9 | #include "SkCanvas.h" |
| 10 | #include "SkGlyphCache.h" |
| 11 | #include "SkPaint.h" |
| 12 | #include "SkPath.h" |
| 13 | #include "SkRandom.h" |
| 14 | |
| 15 | static constexpr int kScreenWidth = 1500; |
| 16 | static constexpr int kScreenHeight = 1500; |
| 17 | |
| 18 | static constexpr int kNumDraws = 2000; |
| 19 | |
| 20 | // I and l are rects on OS X. |
| 21 | static constexpr char kGlyphs[] = "ABCDEFGH7JKLMNOPQRSTUVWXYZabcdefghijk1mnopqrstuvwxyz"; |
| 22 | static constexpr int kNumGlyphs = sizeof(kGlyphs) - 1; |
| 23 | static_assert(52 == kNumGlyphs, "expected 52 glyphs"); |
| 24 | |
| 25 | /* |
| 26 | * This class benchmarks drawing many glyphs at random scales and rotations. |
| 27 | */ |
| 28 | class PathTextBench : public Benchmark { |
| 29 | public: |
| 30 | bool isVisual() override { return true; } |
| 31 | |
| 32 | private: |
| 33 | const char* onGetName() override { |
| 34 | return "path_text"; |
| 35 | } |
| 36 | SkIPoint onGetSize() override { return SkIPoint::Make(kScreenWidth, kScreenHeight); } |
| 37 | |
| 38 | void onDelayedSetup() override { |
| 39 | SkPaint defaultPaint; |
| 40 | SkAutoGlyphCache agc(defaultPaint, nullptr, &SkMatrix::I()); |
| 41 | SkGlyphCache* cache = agc.getCache(); |
| 42 | for (int i = 0; i < kNumGlyphs; ++i) { |
| 43 | SkGlyphID id = cache->unicharToGlyph(kGlyphs[i]); |
| 44 | cache->getScalerContext()->getPath(SkPackedGlyphID(id), &fGlyphs[i]); |
| 45 | } |
| 46 | |
| 47 | SkRandom rand; |
| 48 | for (int i = 0; i < kNumDraws; ++i) { |
| 49 | const SkPath& glyph = fGlyphs[i % kNumGlyphs]; |
| 50 | const SkRect& bounds = glyph.getBounds(); |
| 51 | float glyphSize = SkTMax(bounds.width(), bounds.height()); |
| 52 | |
| 53 | float t0 = pow(rand.nextF(), 100); |
| 54 | float size = (1 - t0) * SkTMin(kScreenWidth, kScreenHeight) / 50 + |
| 55 | t0 * SkTMin(kScreenWidth, kScreenHeight) / 3; |
| 56 | float scale = size / glyphSize; |
| 57 | float t1 = rand.nextF(), t2 = rand.nextF(); |
| 58 | fXforms[i].setTranslate((1 - t1) * sqrt(2) * scale/2 * glyphSize + |
| 59 | t1 * (kScreenWidth - sqrt(2) * scale/2 * glyphSize), |
| 60 | (1 - t2) * sqrt(2) * scale/2 * glyphSize + |
| 61 | t2 * (kScreenHeight - sqrt(2) * scale/2 * glyphSize)); |
| 62 | fXforms[i].preRotate(rand.nextF() * 360); |
| 63 | fXforms[i].preTranslate(-scale/2 * bounds.width(), -scale/2 * bounds.height()); |
| 64 | fXforms[i].preScale(scale, scale); |
| 65 | fPaints[i].setAntiAlias(true); |
| 66 | fPaints[i].setColor(rand.nextU() | 0x80808080); |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | void onDraw(int loops, SkCanvas* canvas) override { |
| 71 | SkAutoCanvasRestore acr(canvas, true); |
| 72 | for (int i = 0; i < kNumDraws; ++i) { |
| 73 | const SkPath& glyph = fGlyphs[i % kNumGlyphs]; |
| 74 | canvas->setMatrix(fXforms[i]); |
| 75 | canvas->drawPath(glyph, fPaints[i]); |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | SkPath fGlyphs[kNumGlyphs]; |
| 80 | SkPaint fPaints[kNumDraws]; |
| 81 | SkMatrix fXforms[kNumDraws]; |
| 82 | |
| 83 | typedef Benchmark INHERITED; |
| 84 | }; |
| 85 | |
| 86 | DEF_BENCH(return new PathTextBench;) |