1 /* 2 * Copyright 2014 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 "gm/gm.h" 9 #include "include/core/SkCanvas.h" 10 #include "include/core/SkColor.h" 11 #include "include/core/SkFont.h" 12 #include "include/core/SkFontStyle.h" 13 #include "include/core/SkFontTypes.h" 14 #include "include/core/SkPaint.h" 15 #include "include/core/SkPoint.h" 16 #include "include/core/SkRect.h" 17 #include "include/core/SkRefCnt.h" 18 #include "include/core/SkScalar.h" 19 #include "include/core/SkSize.h" 20 #include "include/core/SkString.h" 21 #include "include/core/SkTypeface.h" 22 #include "include/core/SkTypes.h" 23 #include "include/utils/SkRandom.h" 24 #include "tools/ToolUtils.h" 25 26 /** 27 * Draws text with random parameters. The text draws each get their own clip rect. It is also 28 * used as a bench to measure how well the GPU backend combines draw ops for text draws. 29 */ 30 31 class VariedTextGM : public skiagm::GM { 32 public: VariedTextGM(bool effectiveClip,bool lcd)33 VariedTextGM(bool effectiveClip, bool lcd) 34 : fEffectiveClip(effectiveClip) 35 , fLCD(lcd) { 36 } 37 38 protected: onShortName()39 SkString onShortName() override { 40 SkString name("varied_text"); 41 if (fEffectiveClip) { 42 name.append("_clipped"); 43 } else { 44 name.append("_ignorable_clip"); 45 } 46 if (fLCD) { 47 name.append("_lcd"); 48 } else { 49 name.append("_no_lcd"); 50 } 51 return name; 52 } 53 onISize()54 SkISize onISize() override { 55 return SkISize::Make(640, 480); 56 } 57 onOnceBeforeDraw()58 void onOnceBeforeDraw() override { 59 fPaint.setAntiAlias(true); 60 fFont.setEdging(fLCD ? SkFont::Edging::kSubpixelAntiAlias : SkFont::Edging::kAntiAlias); 61 62 SkISize size = this->getISize(); 63 SkScalar w = SkIntToScalar(size.fWidth); 64 SkScalar h = SkIntToScalar(size.fHeight); 65 66 static_assert(4 == SK_ARRAY_COUNT(fTypefaces), "typeface_cnt"); 67 fTypefaces[0] = ToolUtils::create_portable_typeface("sans-serif", SkFontStyle()); 68 fTypefaces[1] = ToolUtils::create_portable_typeface("sans-serif", SkFontStyle::Bold()); 69 fTypefaces[2] = ToolUtils::create_portable_typeface("serif", SkFontStyle()); 70 fTypefaces[3] = ToolUtils::create_portable_typeface("serif", SkFontStyle::Bold()); 71 72 SkRandom random; 73 for (int i = 0; i < kCnt; ++i) { 74 int length = random.nextRangeU(kMinLength, kMaxLength); 75 char text[kMaxLength]; 76 for (int j = 0; j < length; ++j) { 77 text[j] = (char)random.nextRangeU('!', 'z'); 78 } 79 fStrings[i].set(text, length); 80 81 fColors[i] = random.nextU(); 82 fColors[i] |= 0xFF000000; 83 fColors[i] = ToolUtils::color_to_565(fColors[i]); 84 85 constexpr SkScalar kMinPtSize = 8.f; 86 constexpr SkScalar kMaxPtSize = 32.f; 87 88 fPtSizes[i] = random.nextRangeScalar(kMinPtSize, kMaxPtSize); 89 90 fTypefaceIndices[i] = random.nextULessThan(SK_ARRAY_COUNT(fTypefaces)); 91 92 SkRect r; 93 fPaint.setColor(fColors[i]); 94 fFont.setTypeface(fTypefaces[fTypefaceIndices[i]]); 95 fFont.setSize(fPtSizes[i]); 96 97 fFont.measureText(fStrings[i].c_str(), fStrings[i].size(), SkTextEncoding::kUTF8, &r); 98 // The set of x,y offsets which place the bounding box inside the GM's border. 99 SkRect safeRect = SkRect::MakeLTRB(-r.fLeft, -r.fTop, w - r.fRight, h - r.fBottom); 100 if (safeRect.isEmpty()) { 101 // If the bounds don't fit then allow any offset in the GM's border. 102 safeRect = SkRect::MakeWH(w, h); 103 } 104 fOffsets[i].fX = random.nextRangeScalar(safeRect.fLeft, safeRect.fRight); 105 fOffsets[i].fY = random.nextRangeScalar(safeRect.fTop, safeRect.fBottom); 106 107 fClipRects[i] = r; 108 fClipRects[i].offset(fOffsets[i].fX, fOffsets[i].fY); 109 fClipRects[i].outset(2.f, 2.f); 110 111 if (fEffectiveClip) { 112 fClipRects[i].fRight -= 0.25f * fClipRects[i].width(); 113 } 114 } 115 } 116 onDraw(SkCanvas * canvas)117 void onDraw(SkCanvas* canvas) override { 118 for (int i = 0; i < kCnt; ++i) { 119 fPaint.setColor(fColors[i]); 120 fFont.setSize(fPtSizes[i]); 121 fFont.setTypeface(fTypefaces[fTypefaceIndices[i]]); 122 123 canvas->save(); 124 canvas->clipRect(fClipRects[i]); 125 canvas->translate(fOffsets[i].fX, fOffsets[i].fY); 126 canvas->drawSimpleText(fStrings[i].c_str(), fStrings[i].size(), SkTextEncoding::kUTF8, 127 0, 0, fFont, fPaint); 128 canvas->restore(); 129 } 130 131 // Visualize the clips, but not in bench mode. 132 if (kBench_Mode != this->getMode()) { 133 SkPaint wirePaint; 134 wirePaint.setAntiAlias(true); 135 wirePaint.setStrokeWidth(0); 136 wirePaint.setStyle(SkPaint::kStroke_Style); 137 for (int i = 0; i < kCnt; ++i) { 138 canvas->drawRect(fClipRects[i], wirePaint); 139 } 140 } 141 } 142 runAsBench() const143 bool runAsBench() const override { return true; } 144 145 private: 146 inline static constexpr int kCnt = 30; 147 inline static constexpr int kMinLength = 15; 148 inline static constexpr int kMaxLength = 40; 149 150 bool fEffectiveClip; 151 bool fLCD; 152 sk_sp<SkTypeface> fTypefaces[4]; 153 SkPaint fPaint; 154 SkFont fFont; 155 156 // precomputed for each text draw 157 SkString fStrings[kCnt]; 158 SkColor fColors[kCnt]; 159 SkScalar fPtSizes[kCnt]; 160 int fTypefaceIndices[kCnt]; 161 SkPoint fOffsets[kCnt]; 162 SkRect fClipRects[kCnt]; 163 164 using INHERITED = skiagm::GM; 165 }; 166 167 DEF_GM(return new VariedTextGM(false, false);) 168 DEF_GM(return new VariedTextGM(true, false);) 169 DEF_GM(return new VariedTextGM(false, true);) 170 DEF_GM(return new VariedTextGM(true, true);) 171