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 "bench/Benchmark.h" 9 #include "include/core/SkCanvas.h" 10 #include "include/core/SkPaint.h" 11 #include "include/core/SkPath.h" 12 #include "src/base/SkRandom.h" 13 #include "src/core/SkStrike.h" 14 #include "src/core/SkStrikeCache.h" 15 #include "src/core/SkStrikeSpec.h" 16 #include "tools/ToolUtils.h" 17 18 static constexpr int kScreenWidth = 1500; 19 static constexpr int kScreenHeight = 1500; 20 21 static constexpr int kNumDraws = 2000; 22 23 // I and l are rects on OS X. 24 static constexpr char kGlyphs[] = "ABCDEFGH7JKLMNOPQRSTUVWXYZabcdefghijk1mnopqrstuvwxyz"; 25 static constexpr int kNumGlyphs = sizeof(kGlyphs) - 1; 26 static_assert(52 == kNumGlyphs, "expected 52 glyphs"); 27 28 /* 29 * This class benchmarks drawing many glyphs at random scales and rotations. 30 */ 31 class PathTextBench : public Benchmark { 32 public: PathTextBench(bool clipped,bool uncached)33 PathTextBench(bool clipped, bool uncached) : fClipped(clipped), fUncached(uncached) {} 34 35 private: onGetName()36 const char* onGetName() override { 37 fName = "path_text"; 38 if (fClipped) { 39 fName.append("_clipped"); 40 } 41 if (fUncached) { 42 fName.append("_uncached"); 43 } 44 return fName.c_str(); 45 } onGetSize()46 SkIPoint onGetSize() override { return SkIPoint::Make(kScreenWidth, kScreenHeight); } 47 onDelayedSetup()48 void onDelayedSetup() override { 49 SkFont defaultFont; 50 SkStrikeSpec strikeSpec = SkStrikeSpec::MakeWithNoDevice(defaultFont); 51 SkBulkGlyphMetricsAndPaths pathMaker{strikeSpec}; 52 for (int i = 0; i < kNumGlyphs; ++i) { 53 SkGlyphID id(defaultFont.unicharToGlyph(kGlyphs[i])); 54 const SkGlyph* glyph = pathMaker.glyph(id); 55 if (glyph->path()) { 56 fGlyphs[i] = *glyph->path(); 57 } 58 fGlyphs[i].setIsVolatile(fUncached); 59 } 60 61 SkRandom rand; 62 for (int i = 0; i < kNumDraws; ++i) { 63 const SkPath& glyph = fGlyphs[i % kNumGlyphs]; 64 const SkRect& bounds = glyph.getBounds(); 65 float glyphSize = std::max(bounds.width(), bounds.height()); 66 67 float t0 = pow(rand.nextF(), 100); 68 float size = (1 - t0) * std::min(kScreenWidth, kScreenHeight) / 50 + 69 t0 * std::min(kScreenWidth, kScreenHeight) / 3; 70 float scale = size / glyphSize; 71 float t1 = rand.nextF(), t2 = rand.nextF(); 72 fXforms[i].setTranslate((1 - t1) * sqrt(2) * scale/2 * glyphSize + 73 t1 * (kScreenWidth - sqrt(2) * scale/2 * glyphSize), 74 (1 - t2) * sqrt(2) * scale/2 * glyphSize + 75 t2 * (kScreenHeight - sqrt(2) * scale/2 * glyphSize)); 76 fXforms[i].preRotate(rand.nextF() * 360); 77 fXforms[i].preTranslate(-scale/2 * bounds.width(), -scale/2 * bounds.height()); 78 fXforms[i].preScale(scale, scale); 79 fPaints[i].setAntiAlias(true); 80 fPaints[i].setColor(rand.nextU() | 0x80808080); 81 } 82 83 if (fClipped) { 84 fClipPath = ToolUtils::make_star(SkRect::MakeIWH(kScreenWidth, kScreenHeight), 11, 3); 85 fClipPath.setIsVolatile(fUncached); 86 } 87 } 88 onDraw(int loops,SkCanvas * canvas)89 void onDraw(int loops, SkCanvas* canvas) override { 90 SkAutoCanvasRestore acr(canvas, true); 91 if (fClipped) { 92 canvas->clipPath(fClipPath, SkClipOp::kIntersect, true); 93 } 94 for (int i = 0; i < kNumDraws; ++i) { 95 const SkPath& glyph = fGlyphs[i % kNumGlyphs]; 96 canvas->setMatrix(fXforms[i]); 97 canvas->drawPath(glyph, fPaints[i]); 98 } 99 } 100 101 const bool fClipped; 102 const bool fUncached; 103 SkString fName; 104 SkPath fGlyphs[kNumGlyphs]; 105 SkPaint fPaints[kNumDraws]; 106 SkMatrix fXforms[kNumDraws]; 107 SkPath fClipPath; 108 109 using INHERITED = Benchmark; 110 }; 111 112 DEF_BENCH(return new PathTextBench(false, false);) 113 DEF_BENCH(return new PathTextBench(false, true);) 114 DEF_BENCH(return new PathTextBench(true, true);) 115