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 // safeRect is set of x,y positions where we can draw the string without hitting 99 // the GM's border. 100 SkRect safeRect = SkRect::MakeLTRB(-r.fLeft, -r.fTop, w - r.fRight, h - r.fBottom); 101 if (safeRect.isEmpty()) { 102 // If we don't fit then just don't worry about how we get cliped to the device 103 // border. 104 safeRect = SkRect::MakeWH(w, h); 105 } 106 fPositions[i].fX = random.nextRangeScalar(safeRect.fLeft, safeRect.fRight); 107 fPositions[i].fY = random.nextRangeScalar(safeRect.fTop, safeRect.fBottom); 108 109 fClipRects[i] = r; 110 fClipRects[i].offset(fPositions[i].fX, fPositions[i].fY); 111 fClipRects[i].outset(2.f, 2.f); 112 113 if (fEffectiveClip) { 114 fClipRects[i].fRight -= 0.25f * fClipRects[i].width(); 115 } 116 } 117 } 118 onDraw(SkCanvas * canvas)119 void onDraw(SkCanvas* canvas) override { 120 for (int i = 0; i < kCnt; ++i) { 121 fPaint.setColor(fColors[i]); 122 fFont.setSize(fPtSizes[i]); 123 fFont.setTypeface(fTypefaces[fTypefaceIndices[i]]); 124 125 canvas->save(); 126 canvas->clipRect(fClipRects[i]); 127 canvas->translate(fPositions[i].fX, fPositions[i].fY); 128 canvas->drawSimpleText(fStrings[i].c_str(), fStrings[i].size(), SkTextEncoding::kUTF8, 129 0, 0, fFont, fPaint); 130 canvas->restore(); 131 } 132 133 // Visualize the clips, but not in bench mode. 134 if (kBench_Mode != this->getMode()) { 135 SkPaint wirePaint; 136 wirePaint.setAntiAlias(true); 137 wirePaint.setStrokeWidth(0); 138 wirePaint.setStyle(SkPaint::kStroke_Style); 139 for (int i = 0; i < kCnt; ++i) { 140 canvas->drawRect(fClipRects[i], wirePaint); 141 } 142 } 143 } 144 runAsBench() const145 bool runAsBench() const override { return true; } 146 147 private: 148 static constexpr int kCnt = 30; 149 static constexpr int kMinLength = 15; 150 static constexpr int kMaxLength = 40; 151 152 bool fEffectiveClip; 153 bool fLCD; 154 sk_sp<SkTypeface> fTypefaces[4]; 155 SkPaint fPaint; 156 SkFont fFont; 157 158 // precomputed for each text draw 159 SkString fStrings[kCnt]; 160 SkColor fColors[kCnt]; 161 SkScalar fPtSizes[kCnt]; 162 int fTypefaceIndices[kCnt]; 163 SkPoint fPositions[kCnt]; 164 SkRect fClipRects[kCnt]; 165 166 typedef skiagm::GM INHERITED; 167 }; 168 169 DEF_GM(return new VariedTextGM(false, false);) 170 DEF_GM(return new VariedTextGM(true, false);) 171 DEF_GM(return new VariedTextGM(false, true);) 172 DEF_GM(return new VariedTextGM(true, true);) 173