1 #include "SampleCode.h" 2 #include "SkView.h" 3 #include "SkCanvas.h" 4 #include "SkDevice.h" 5 #include "SkPaint.h" 6 #include "SkShader.h" 7 8 static SkBitmap createBitmap(int n) { 9 SkBitmap bitmap; 10 bitmap.setConfig(SkBitmap::kARGB_8888_Config, n, n); 11 bitmap.allocPixels(); 12 bitmap.eraseColor(SK_ColorGREEN); 13 14 SkCanvas canvas(bitmap); 15 SkRect r; 16 r.set(0, 0, SkIntToScalar(n), SkIntToScalar(n)); 17 SkPaint paint; 18 paint.setAntiAlias(true); 19 20 paint.setColor(SK_ColorRED); 21 canvas.drawOval(r, paint); 22 paint.setColor(SK_ColorBLUE); 23 paint.setStrokeWidth(SkIntToScalar(n)/15); 24 paint.setStyle(SkPaint::kStroke_Style); 25 canvas.drawLine(0, 0, r.fRight, r.fBottom, paint); 26 canvas.drawLine(0, r.fBottom, r.fRight, 0, paint); 27 28 return bitmap; 29 } 30 31 class AARectView : public SampleView { 32 SkBitmap fBitmap; 33 enum { 34 N = 64 35 }; 36 public: 37 AARectView() { 38 fBitmap = createBitmap(N); 39 40 fWidth = N; 41 } 42 43 protected: 44 // overrides from SkEventSink 45 virtual bool onQuery(SkEvent* evt) { 46 if (SampleCode::TitleQ(*evt)) { 47 SampleCode::TitleR(evt, "AA Rects"); 48 return true; 49 } 50 return this->INHERITED::onQuery(evt); 51 } 52 53 virtual void onDrawContent(SkCanvas* canvas) { 54 canvas->translate(SkIntToScalar(10), SkIntToScalar(10)); 55 56 SkPaint bluePaint; 57 bluePaint.setARGB(0xff, 0x0, 0x0, 0xff); 58 SkPaint bmpPaint; 59 SkShader* bmpShader = SkShader::CreateBitmapShader(fBitmap, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode); 60 bmpPaint.setShader(bmpShader); 61 bmpShader->unref(); 62 63 bluePaint.setStrokeWidth(3); 64 bmpPaint.setStrokeWidth(3); 65 66 SkPaint paints[] = { bluePaint, bmpPaint }; 67 68 SkRect rect; 69 70 SkScalar dx = SkIntToScalar(80); 71 SkScalar dy = SkIntToScalar(100); 72 SkMatrix matrix; 73 for (size_t p = 0; p < SK_ARRAY_COUNT(paints); ++p) { 74 for (int stroke = 0; stroke < 2; ++stroke) { 75 paints[p].setStyle(stroke ? SkPaint::kStroke_Style : SkPaint::kFill_Style); 76 for (int a = 0; a < 3; ++ a) { 77 paints[p].setAntiAlias(a > 0); 78 paints[p].setAlpha(a > 1 ? 0x80 : 0xff); 79 80 canvas->save(); 81 rect = SkRect::MakeLTRB(SkFloatToScalar(0.f), 82 SkFloatToScalar(0.f), 83 SkFloatToScalar(40.f), 84 SkFloatToScalar(40.f)); 85 canvas->drawRect(rect, paints[p]); 86 canvas->translate(dx, 0); 87 88 rect = SkRect::MakeLTRB(SkFloatToScalar(0.5f), 89 SkFloatToScalar(0.5f), 90 SkFloatToScalar(40.5f), 91 SkFloatToScalar(40.5f)); 92 canvas->drawRect(rect, paints[p]); 93 canvas->translate(dx, 0); 94 95 rect = SkRect::MakeLTRB(SkFloatToScalar(0.5f), 96 SkFloatToScalar(0.5f), 97 SkFloatToScalar(40.f), 98 SkFloatToScalar(40.f)); 99 canvas->drawRect(rect, paints[p]); 100 canvas->translate(dx, 0); 101 102 rect = SkRect::MakeLTRB(SkFloatToScalar(0.75f), 103 SkFloatToScalar(0.75f), 104 SkFloatToScalar(40.75f), 105 SkFloatToScalar(40.75f)); 106 canvas->drawRect(rect, paints[p]); 107 canvas->translate(dx, 0); 108 109 canvas->save(); 110 canvas->translate(SkFloatToScalar(.33f), SkFloatToScalar(.67f)); 111 rect = SkRect::MakeLTRB(SkFloatToScalar(0.0f), 112 SkFloatToScalar(0.0f), 113 SkFloatToScalar(40.0f), 114 SkFloatToScalar(40.0f)); 115 canvas->drawRect(rect, paints[p]); 116 canvas->restore(); 117 canvas->translate(dx, 0); 118 119 canvas->save(); 120 matrix.setRotate(SkFloatToScalar(45.f)); 121 canvas->concat(matrix); 122 canvas->translate(SkFloatToScalar(20.0f / sqrtf(2.f)), 123 SkFloatToScalar(20.0f / sqrtf(2.f))); 124 rect = SkRect::MakeLTRB(SkFloatToScalar(-20.0f), 125 SkFloatToScalar(-20.0f), 126 SkFloatToScalar(20.0f), 127 SkFloatToScalar(20.0f)); 128 canvas->drawRect(rect, paints[p]); 129 canvas->restore(); 130 canvas->translate(dx, 0); 131 132 canvas->save(); 133 canvas->rotate(SkFloatToScalar(90.f)); 134 rect = SkRect::MakeLTRB(SkFloatToScalar(0.0f), 135 SkFloatToScalar(0.0f), 136 SkFloatToScalar(40.0f), 137 SkFloatToScalar(-40.0f)); 138 canvas->drawRect(rect, paints[p]); 139 canvas->restore(); 140 canvas->translate(dx, 0); 141 142 canvas->save(); 143 canvas->rotate(SkFloatToScalar(90.f)); 144 rect = SkRect::MakeLTRB(SkFloatToScalar(0.5f), 145 SkFloatToScalar(0.5f), 146 SkFloatToScalar(40.5f), 147 SkFloatToScalar(-40.5f)); 148 canvas->drawRect(rect, paints[p]); 149 canvas->restore(); 150 canvas->translate(dx, 0); 151 152 canvas->save(); 153 matrix.setScale(SkFloatToScalar(-1.f), SkFloatToScalar(-1.f)); 154 canvas->concat(matrix); 155 rect = SkRect::MakeLTRB(SkFloatToScalar(0.5f), 156 SkFloatToScalar(0.5f), 157 SkFloatToScalar(-40.5f), 158 SkFloatToScalar(-40.5f)); 159 canvas->drawRect(rect, paints[p]); 160 canvas->restore(); 161 canvas->translate(dx, 0); 162 163 canvas->save(); 164 matrix.setScale(SkFloatToScalar(2.1f), SkFloatToScalar(4.1f)); 165 canvas->concat(matrix); 166 rect = SkRect::MakeLTRB(SkFloatToScalar(0.1f), 167 SkFloatToScalar(0.1f), 168 SkFloatToScalar(19.1f), 169 SkFloatToScalar(9.1f)); 170 canvas->drawRect(rect, paints[p]); 171 canvas->restore(); 172 canvas->translate(dx, 0); 173 174 canvas->restore(); 175 canvas->translate(0, dy); 176 } 177 } 178 } 179 } 180 181 private: 182 int fWidth; 183 184 typedef SampleView INHERITED; 185 }; 186 187 ////////////////////////////////////////////////////////////////////////////// 188 189 static SkView* MyFactory() { return new AARectView; } 190 static SkViewRegister reg(MyFactory); 191 192
