1 2 /* 3 * Copyright 2011 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 #include "SampleCode.h" 9 #include "SkView.h" 10 #include "SkCanvas.h" 11 #include "SkDevice.h" 12 #include "SkPaint.h" 13 #include "SkShader.h" 14 15 static SkBitmap createBitmap(int n) { 16 SkBitmap bitmap; 17 bitmap.setConfig(SkBitmap::kARGB_8888_Config, n, n); 18 bitmap.allocPixels(); 19 bitmap.eraseColor(SK_ColorGREEN); 20 21 SkCanvas canvas(bitmap); 22 SkRect r; 23 r.set(0, 0, SkIntToScalar(n), SkIntToScalar(n)); 24 SkPaint paint; 25 paint.setAntiAlias(true); 26 27 paint.setColor(SK_ColorRED); 28 canvas.drawOval(r, paint); 29 paint.setColor(SK_ColorBLUE); 30 paint.setStrokeWidth(SkIntToScalar(n)/15); 31 paint.setStyle(SkPaint::kStroke_Style); 32 canvas.drawLine(0, 0, r.fRight, r.fBottom, paint); 33 canvas.drawLine(0, r.fBottom, r.fRight, 0, paint); 34 35 return bitmap; 36 } 37 38 class AARectView : public SampleView { 39 SkBitmap fBitmap; 40 enum { 41 N = 64 42 }; 43 public: 44 AARectView() { 45 fBitmap = createBitmap(N); 46 47 fWidth = N; 48 } 49 50 protected: 51 // overrides from SkEventSink 52 virtual bool onQuery(SkEvent* evt) { 53 if (SampleCode::TitleQ(*evt)) { 54 SampleCode::TitleR(evt, "AA Rects"); 55 return true; 56 } 57 return this->INHERITED::onQuery(evt); 58 } 59 60 virtual void onDrawContent(SkCanvas* canvas) { 61 canvas->translate(SkIntToScalar(10), SkIntToScalar(10)); 62 63 SkPaint bluePaint; 64 bluePaint.setARGB(0xff, 0x0, 0x0, 0xff); 65 SkPaint bmpPaint; 66 SkShader* bmpShader = SkShader::CreateBitmapShader(fBitmap, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode); 67 bmpPaint.setShader(bmpShader); 68 bmpShader->unref(); 69 70 bluePaint.setStrokeWidth(3); 71 bmpPaint.setStrokeWidth(3); 72 73 SkPaint paints[] = { bluePaint, bmpPaint }; 74 75 SkRect rect; 76 77 SkScalar dx = SkIntToScalar(80); 78 SkScalar dy = SkIntToScalar(100); 79 SkMatrix matrix; 80 for (size_t p = 0; p < SK_ARRAY_COUNT(paints); ++p) { 81 for (int stroke = 0; stroke < 2; ++stroke) { 82 paints[p].setStyle(stroke ? SkPaint::kStroke_Style : SkPaint::kFill_Style); 83 for (int a = 0; a < 3; ++ a) { 84 paints[p].setAntiAlias(a > 0); 85 paints[p].setAlpha(a > 1 ? 0x80 : 0xff); 86 87 canvas->save(); 88 rect = SkRect::MakeLTRB(SkFloatToScalar(0.f), 89 SkFloatToScalar(0.f), 90 SkFloatToScalar(40.f), 91 SkFloatToScalar(40.f)); 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(40.5f), 98 SkFloatToScalar(40.5f)); 99 canvas->drawRect(rect, paints[p]); 100 canvas->translate(dx, 0); 101 102 rect = SkRect::MakeLTRB(SkFloatToScalar(0.5f), 103 SkFloatToScalar(0.5f), 104 SkFloatToScalar(40.f), 105 SkFloatToScalar(40.f)); 106 canvas->drawRect(rect, paints[p]); 107 canvas->translate(dx, 0); 108 109 rect = SkRect::MakeLTRB(SkFloatToScalar(0.75f), 110 SkFloatToScalar(0.75f), 111 SkFloatToScalar(40.75f), 112 SkFloatToScalar(40.75f)); 113 canvas->drawRect(rect, paints[p]); 114 canvas->translate(dx, 0); 115 116 canvas->save(); 117 canvas->translate(SkFloatToScalar(.33f), SkFloatToScalar(.67f)); 118 rect = SkRect::MakeLTRB(SkFloatToScalar(0.0f), 119 SkFloatToScalar(0.0f), 120 SkFloatToScalar(40.0f), 121 SkFloatToScalar(40.0f)); 122 canvas->drawRect(rect, paints[p]); 123 canvas->restore(); 124 canvas->translate(dx, 0); 125 126 canvas->save(); 127 matrix.setRotate(SkFloatToScalar(45.f)); 128 canvas->concat(matrix); 129 canvas->translate(SkFloatToScalar(20.0f / sqrtf(2.f)), 130 SkFloatToScalar(20.0f / sqrtf(2.f))); 131 rect = SkRect::MakeLTRB(SkFloatToScalar(-20.0f), 132 SkFloatToScalar(-20.0f), 133 SkFloatToScalar(20.0f), 134 SkFloatToScalar(20.0f)); 135 canvas->drawRect(rect, paints[p]); 136 canvas->restore(); 137 canvas->translate(dx, 0); 138 139 canvas->save(); 140 canvas->rotate(SkFloatToScalar(90.f)); 141 rect = SkRect::MakeLTRB(SkFloatToScalar(0.0f), 142 SkFloatToScalar(0.0f), 143 SkFloatToScalar(40.0f), 144 SkFloatToScalar(-40.0f)); 145 canvas->drawRect(rect, paints[p]); 146 canvas->restore(); 147 canvas->translate(dx, 0); 148 149 canvas->save(); 150 canvas->rotate(SkFloatToScalar(90.f)); 151 rect = SkRect::MakeLTRB(SkFloatToScalar(0.5f), 152 SkFloatToScalar(0.5f), 153 SkFloatToScalar(40.5f), 154 SkFloatToScalar(-40.5f)); 155 canvas->drawRect(rect, paints[p]); 156 canvas->restore(); 157 canvas->translate(dx, 0); 158 159 canvas->save(); 160 matrix.setScale(SkFloatToScalar(-1.f), SkFloatToScalar(-1.f)); 161 canvas->concat(matrix); 162 rect = SkRect::MakeLTRB(SkFloatToScalar(0.5f), 163 SkFloatToScalar(0.5f), 164 SkFloatToScalar(-40.5f), 165 SkFloatToScalar(-40.5f)); 166 canvas->drawRect(rect, paints[p]); 167 canvas->restore(); 168 canvas->translate(dx, 0); 169 170 canvas->save(); 171 matrix.setScale(SkFloatToScalar(2.1f), SkFloatToScalar(4.1f)); 172 canvas->concat(matrix); 173 rect = SkRect::MakeLTRB(SkFloatToScalar(0.1f), 174 SkFloatToScalar(0.1f), 175 SkFloatToScalar(19.1f), 176 SkFloatToScalar(9.1f)); 177 canvas->drawRect(rect, paints[p]); 178 canvas->restore(); 179 canvas->translate(dx, 0); 180 181 canvas->restore(); 182 canvas->translate(0, dy); 183 } 184 } 185 } 186 } 187 188 private: 189 int fWidth; 190 191 typedef SampleView INHERITED; 192 }; 193 194 ////////////////////////////////////////////////////////////////////////////// 195 196 static SkView* MyFactory() { return new AARectView; } 197 static SkViewRegister reg(MyFactory); 198 199
