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| 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.h" |
| 9 #include "SkCanvas.h" |
| 10 #include "SkPath.h" |
| 11 #include "SkTypeface.h" |
| 12 #include "SkRandom.h" |
| 13 |
| 14 /** |
| 15 * Draws text with random parameters. The text draws each get their own clip rec
t. It is also |
| 16 * used as a bench to measure how well the GPU backend batches text draws. |
| 17 */ |
| 18 |
| 19 class VariedTextGM : public skiagm::GM { |
| 20 public: |
| 21 VariedTextGM(bool effectiveClip, bool lcd) |
| 22 : fEffectiveClip(effectiveClip) |
| 23 , fLCD(lcd) { |
| 24 memset(fTypefacesToUnref, 0, sizeof(fTypefacesToUnref)); |
| 25 } |
| 26 |
| 27 ~VariedTextGM() { |
| 28 for (size_t i = 0; i < SK_ARRAY_COUNT(fTypefacesToUnref); ++i) { |
| 29 SkSafeUnref(fTypefacesToUnref[i]); |
| 30 } |
| 31 } |
| 32 |
| 33 protected: |
| 34 virtual SkString onShortName() SK_OVERRIDE { |
| 35 SkString name("varied_text"); |
| 36 if (fEffectiveClip) { |
| 37 name.append("_clipped"); |
| 38 } else { |
| 39 name.append("_ignorable_clip"); |
| 40 } |
| 41 if (fLCD) { |
| 42 name.append("_lcd"); |
| 43 } else { |
| 44 name.append("_no_lcd"); |
| 45 } |
| 46 return name; |
| 47 } |
| 48 |
| 49 virtual SkISize onISize() SK_OVERRIDE { |
| 50 return SkISize::Make(640, 480); |
| 51 } |
| 52 |
| 53 virtual void onOnceBeforeDraw() SK_OVERRIDE { |
| 54 fPaint.setAntiAlias(true); |
| 55 fPaint.setLCDRenderText(fLCD); |
| 56 |
| 57 SkISize size = this->getISize(); |
| 58 SkScalar w = SkIntToScalar(size.fWidth); |
| 59 SkScalar h = SkIntToScalar(size.fHeight); |
| 60 |
| 61 SK_COMPILE_ASSERT(4 == SK_ARRAY_COUNT(fTypefacesToUnref), typeface_cnt); |
| 62 fTypefacesToUnref[0] = SkTypeface::CreateFromName("sans-serif", SkTypefa
ce::kNormal); |
| 63 fTypefacesToUnref[1] = SkTypeface::CreateFromName("sans-serif", SkTypefa
ce::kBold); |
| 64 fTypefacesToUnref[2] = SkTypeface::CreateFromName("serif", SkTypeface::k
Normal); |
| 65 fTypefacesToUnref[3] = SkTypeface::CreateFromName("serif", SkTypeface::k
Bold); |
| 66 |
| 67 SkRandom random; |
| 68 for (int i = 0; i < kCnt; ++i) { |
| 69 int length = random.nextRangeU(kMinLength, kMaxLength); |
| 70 char text[kMaxLength]; |
| 71 for (int j = 0; j < length; ++j) { |
| 72 text[j] = (char)random.nextRangeU('!', 'z'); |
| 73 } |
| 74 fStrings[i].set(text, length); |
| 75 |
| 76 fColors[i] = random.nextU(); |
| 77 fColors[i] |= 0xFF000000; |
| 78 |
| 79 static const SkScalar kMinPtSize = 8.f; |
| 80 static const SkScalar kMaxPtSize = 32.f; |
| 81 |
| 82 fPtSizes[i] = random.nextRangeScalar(kMinPtSize, kMaxPtSize); |
| 83 |
| 84 fTypefaces[i] = fTypefacesToUnref[ |
| 85 random.nextULessThan(SK_ARRAY_COUNT(fTypefacesToUnref))]; |
| 86 |
| 87 SkRect r; |
| 88 fPaint.setColor(fColors[i]); |
| 89 fPaint.setTypeface(fTypefaces[i]); |
| 90 fPaint.setTextSize(fPtSizes[i]); |
| 91 |
| 92 fPaint.measureText(fStrings[i].c_str(), fStrings[i].size(), &r); |
| 93 // safeRect is set of x,y positions where we can draw the string wit
hout hitting |
| 94 // the GM's border. |
| 95 SkRect safeRect = SkRect::MakeLTRB(-r.fLeft, -r.fTop, w - r.fRight,
h - r.fBottom); |
| 96 if (safeRect.isEmpty()) { |
| 97 // If we don't fit then just don't worry about how we get cliped
to the device |
| 98 // border. |
| 99 safeRect = SkRect::MakeWH(w, h); |
| 100 } |
| 101 fPositions[i].fX = random.nextRangeScalar(safeRect.fLeft, safeRect.f
Right); |
| 102 fPositions[i].fY = random.nextRangeScalar(safeRect.fTop, safeRect.fB
ottom); |
| 103 |
| 104 fClipRects[i] = r; |
| 105 fClipRects[i].offset(fPositions[i].fX, fPositions[i].fY); |
| 106 fClipRects[i].outset(2.f, 2.f); |
| 107 |
| 108 if (fEffectiveClip) { |
| 109 fClipRects[i].fRight -= 0.25f * fClipRects[i].width(); |
| 110 } |
| 111 } |
| 112 } |
| 113 |
| 114 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 115 for (int i = 0; i < kCnt; ++i) { |
| 116 fPaint.setColor(fColors[i]); |
| 117 fPaint.setTextSize(fPtSizes[i]); |
| 118 fPaint.setTypeface(fTypefaces[i]); |
| 119 |
| 120 canvas->save(); |
| 121 canvas->clipRect(fClipRects[i]); |
| 122 canvas->translate(fPositions[i].fX, fPositions[i].fY); |
| 123 canvas->drawText(fStrings[i].c_str(), fStrings[i].size(), 0, 0,
fPaint); |
| 124 canvas->restore(); |
| 125 } |
| 126 |
| 127 // Visualize the clips, but not in bench mode. |
| 128 if (kBench_Mode != this->getMode()) { |
| 129 SkPaint wirePaint; |
| 130 wirePaint.setAntiAlias(true); |
| 131 wirePaint.setStrokeWidth(0); |
| 132 wirePaint.setStyle(SkPaint::kStroke_Style); |
| 133 for (int i = 0; i < kCnt; ++i) { |
| 134 canvas->drawRect(fClipRects[i], wirePaint); |
| 135 } |
| 136 } |
| 137 } |
| 138 |
| 139 virtual uint32_t onGetFlags() const SK_OVERRIDE { |
| 140 // The aa hairline stroked rects used to visualize the clip draw slightl
y differently in |
| 141 // quilt mode in dm. |
| 142 return kAsBench_Flag | kSkipTiled_Flag; |
| 143 } |
| 144 |
| 145 private: |
| 146 static const int kCnt = 30; |
| 147 static const int kMinLength = 15; |
| 148 static const int kMaxLength = 40; |
| 149 |
| 150 bool fEffectiveClip; |
| 151 bool fLCD; |
| 152 SkTypeface* fTypefacesToUnref[4]; |
| 153 SkPaint fPaint; |
| 154 |
| 155 // precomputed for each text draw |
| 156 SkString fStrings[kCnt]; |
| 157 SkColor fColors[kCnt]; |
| 158 SkScalar fPtSizes[kCnt]; |
| 159 SkTypeface* fTypefaces[kCnt]; |
| 160 SkPoint fPositions[kCnt]; |
| 161 SkRect fClipRects[kCnt]; |
| 162 |
| 163 typedef skiagm::GM INHERITED; |
| 164 }; |
| 165 |
| 166 DEF_GM( return SkNEW(VariedTextGM(false, false)); ) |
| 167 DEF_GM( return SkNEW(VariedTextGM(true, false)); ) |
| 168 DEF_GM( return SkNEW(VariedTextGM(false, true)); ) |
| 169 DEF_GM( return SkNEW(VariedTextGM(true, true)); ) |
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