1 /* 2 * Copyright 2011 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 #include "SampleCode.h" 8 #include "SkView.h" 9 #include "SkCanvas.h" 10 #include "SkPaint.h" 11 #include "SkShader.h" 12 13 static SkBitmap createBitmap(int n) { 14 SkBitmap bitmap; 15 bitmap.allocN32Pixels(n, n); 16 bitmap.eraseColor(SK_ColorGREEN); 17 18 SkCanvas canvas(bitmap); 19 SkRect r; 20 r.set(0, 0, SkIntToScalar(n), SkIntToScalar(n)); 21 SkPaint paint; 22 paint.setAntiAlias(true); 23 24 paint.setColor(SK_ColorRED); 25 canvas.drawOval(r, paint); 26 paint.setColor(SK_ColorBLUE); 27 paint.setStrokeWidth(SkIntToScalar(n)/15); 28 paint.setStyle(SkPaint::kStroke_Style); 29 canvas.drawLine(0, 0, r.fRight, r.fBottom, paint); 30 canvas.drawLine(0, r.fBottom, r.fRight, 0, paint); 31 32 return bitmap; 33 } 34 35 class AARectView : public SampleView { 36 SkBitmap fBitmap; 37 enum { 38 N = 64 39 }; 40 public: 41 AARectView() { 42 fBitmap = createBitmap(N); 43 44 fWidth = N; 45 } 46 47 protected: 48 // overrides from SkEventSink 49 virtual bool onQuery(SkEvent* evt) { 50 if (SampleCode::TitleQ(*evt)) { 51 SampleCode::TitleR(evt, "AA Rects"); 52 return true; 53 } 54 return this->INHERITED::onQuery(evt); 55 } 56 57 virtual void onDrawContent(SkCanvas* canvas) { 58 canvas->translate(SkIntToScalar(10), SkIntToScalar(10)); 59 60 SkPaint bluePaint; 61 bluePaint.setARGB(0xff, 0x0, 0x0, 0xff); 62 SkPaint bmpPaint; 63 bmpPaint.setShader(SkShader::MakeBitmapShader(fBitmap, SkShader::kRepeat_TileMode, 64 SkShader::kRepeat_TileMode)); 65 bluePaint.setStrokeWidth(3); 66 bmpPaint.setStrokeWidth(3); 67 68 SkPaint paints[] = { bluePaint, bmpPaint }; 69 70 SkRect rect; 71 72 SkScalar dx = SkIntToScalar(80); 73 SkScalar dy = SkIntToScalar(100); 74 SkMatrix matrix; 75 for (size_t p = 0; p < SK_ARRAY_COUNT(paints); ++p) { 76 for (int stroke = 0; stroke < 2; ++stroke) { 77 paints[p].setStyle(stroke ? SkPaint::kStroke_Style : SkPaint::kFill_Style); 78 for (int a = 0; a < 3; ++ a) { 79 paints[p].setAntiAlias(a > 0); 80 paints[p].setAlpha(a > 1 ? 0x80 : 0xff); 81 82 canvas->save(); 83 rect = SkRect::MakeLTRB(0.f, 84 0.f, 85 40.f, 86 40.f); 87 canvas->drawRect(rect, paints[p]); 88 canvas->translate(dx, 0); 89 90 rect = SkRect::MakeLTRB(0.5f, 91 0.5f, 92 40.5f, 93 40.5f); 94 canvas->drawRect(rect, paints[p]); 95 canvas->translate(dx, 0); 96 97 rect = SkRect::MakeLTRB(0.5f, 98 0.5f, 99 40.f, 100 40.f); 101 canvas->drawRect(rect, paints[p]); 102 canvas->translate(dx, 0); 103 104 rect = SkRect::MakeLTRB(0.75f, 105 0.75f, 106 40.75f, 107 40.75f); 108 canvas->drawRect(rect, paints[p]); 109 canvas->translate(dx, 0); 110 111 canvas->save(); 112 canvas->translate(.33f, .67f); 113 rect = SkRect::MakeLTRB(0.0f, 114 0.0f, 115 40.0f, 116 40.0f); 117 canvas->drawRect(rect, paints[p]); 118 canvas->restore(); 119 canvas->translate(dx, 0); 120 121 canvas->save(); 122 matrix.setRotate(45.f); 123 canvas->concat(matrix); 124 canvas->translate(20.0f / sqrtf(2.f), 125 20.0f / sqrtf(2.f)); 126 rect = SkRect::MakeLTRB(-20.0f, 127 -20.0f, 128 20.0f, 129 20.0f); 130 canvas->drawRect(rect, paints[p]); 131 canvas->restore(); 132 canvas->translate(dx, 0); 133 134 canvas->save(); 135 canvas->rotate(90.f); 136 rect = SkRect::MakeLTRB(0.0f, 137 0.0f, 138 40.0f, 139 -40.0f); 140 canvas->drawRect(rect, paints[p]); 141 canvas->restore(); 142 canvas->translate(dx, 0); 143 144 canvas->save(); 145 canvas->rotate(90.f); 146 rect = SkRect::MakeLTRB(0.5f, 147 0.5f, 148 40.5f, 149 -40.5f); 150 canvas->drawRect(rect, paints[p]); 151 canvas->restore(); 152 canvas->translate(dx, 0); 153 154 canvas->save(); 155 matrix.setScale(-1.f, -1.f); 156 canvas->concat(matrix); 157 rect = SkRect::MakeLTRB(0.5f, 158 0.5f, 159 -40.5f, 160 -40.5f); 161 canvas->drawRect(rect, paints[p]); 162 canvas->restore(); 163 canvas->translate(dx, 0); 164 165 canvas->save(); 166 matrix.setScale(2.1f, 4.1f); 167 canvas->concat(matrix); 168 rect = SkRect::MakeLTRB(0.1f, 169 0.1f, 170 19.1f, 171 9.1f); 172 canvas->drawRect(rect, paints[p]); 173 canvas->restore(); 174 canvas->translate(dx, 0); 175 176 canvas->restore(); 177 canvas->translate(0, dy); 178 } 179 } 180 } 181 } 182 183 private: 184 int fWidth; 185 186 typedef SampleView INHERITED; 187 }; 188 189 ////////////////////////////////////////////////////////////////////////////// 190 191 static SkView* MyFactory() { return new AARectView; } 192 static SkViewRegister reg(MyFactory); 193
