reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame^] | 1 | #include "SampleCode.h" |
| 2 | #include "SkView.h" |
| 3 | #include "SkCanvas.h" |
| 4 | #include "SkBlurMaskFilter.h" |
| 5 | #include "SkCamera.h" |
| 6 | #include "SkColorFilter.h" |
| 7 | #include "SkColorPriv.h" |
| 8 | #include "SkDevice.h" |
| 9 | #include "SkGradientShader.h" |
| 10 | #include "SkImageDecoder.h" |
| 11 | #include "SkInterpolator.h" |
| 12 | #include "SkMaskFilter.h" |
| 13 | #include "SkPath.h" |
| 14 | #include "SkRegion.h" |
| 15 | #include "SkShader.h" |
| 16 | #include "SkShaderExtras.h" |
| 17 | #include "SkTime.h" |
| 18 | #include "SkTypeface.h" |
| 19 | #include "SkUtils.h" |
| 20 | #include "SkKey.h" |
| 21 | #include "SkPorterDuff.h" |
| 22 | #include "SkXfermode.h" |
| 23 | #include "SkDrawFilter.h" |
| 24 | |
| 25 | static void make_paint(SkPaint* paint) { |
| 26 | SkColor colors[] = { 0, SK_ColorWHITE }; |
| 27 | SkPoint pts[] = { 0, 0, 0, SK_Scalar1*20 }; |
| 28 | SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode); |
| 29 | |
| 30 | paint->setShader(s)->unref(); |
| 31 | paint->setXfermode(SkPorterDuff::CreateXfermode(SkPorterDuff::kDstIn_Mode))->unref(); |
| 32 | } |
| 33 | |
| 34 | static void dump_layers(const char label[], SkCanvas* canvas) { |
| 35 | SkDebugf("Dump Layers(%s)\n", label); |
| 36 | |
| 37 | SkCanvas::LayerIter iter(canvas, true); |
| 38 | int index = 0; |
| 39 | while (!iter.done()) { |
| 40 | const SkBitmap& bm = iter.device()->accessBitmap(false); |
| 41 | const SkIRect& clip = iter.clip().getBounds(); |
| 42 | SkDebugf("Layer[%d] bitmap [%d %d] X=%d Y=%d clip=[%d %d %d %d] alpha=%d\n", index++, |
| 43 | bm.width(), bm.height(), iter.x(), iter.y(), |
| 44 | clip.fLeft, clip.fTop, clip.fRight, clip.fBottom, |
| 45 | iter.paint().getAlpha()); |
| 46 | iter.next(); |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | // test drawing with strips of fading gradient above and below |
| 51 | static void test_fade(SkCanvas* canvas) { |
| 52 | SkAutoCanvasRestore ar(canvas, true); |
| 53 | |
| 54 | SkRect r; |
| 55 | |
| 56 | SkPaint p; |
| 57 | p.setAlpha(0x88); |
| 58 | |
| 59 | SkAutoCanvasRestore(canvas, false); |
| 60 | |
| 61 | // create the layers |
| 62 | |
| 63 | r.set(0, 0, SkIntToScalar(100), SkIntToScalar(100)); |
| 64 | canvas->clipRect(r); |
| 65 | |
| 66 | r.fBottom = SkIntToScalar(20); |
| 67 | canvas->saveLayer(&r, NULL, (SkCanvas::SaveFlags)(SkCanvas::kHasAlphaLayer_SaveFlag | SkCanvas::kFullColorLayer_SaveFlag)); |
| 68 | |
| 69 | r.fTop = SkIntToScalar(80); |
| 70 | r.fBottom = SkIntToScalar(100); |
| 71 | canvas->saveLayer(&r, NULL, (SkCanvas::SaveFlags)(SkCanvas::kHasAlphaLayer_SaveFlag | SkCanvas::kFullColorLayer_SaveFlag)); |
| 72 | |
| 73 | // now draw the "content" |
| 74 | |
| 75 | if (true) { |
| 76 | r.set(0, 0, SkIntToScalar(100), SkIntToScalar(100)); |
| 77 | |
| 78 | canvas->saveLayerAlpha(&r, 0x80); |
| 79 | |
| 80 | SkPaint p; |
| 81 | p.setColor(SK_ColorRED); |
| 82 | p.setAntiAlias(true); |
| 83 | canvas->drawOval(r, p); |
| 84 | |
| 85 | dump_layers("inside layer alpha", canvas); |
| 86 | |
| 87 | canvas->restore(); |
| 88 | } else { |
| 89 | r.set(0, 0, SkIntToScalar(100), SkIntToScalar(100)); |
| 90 | |
| 91 | SkPaint p; |
| 92 | p.setColor(SK_ColorRED); |
| 93 | p.setAntiAlias(true); |
| 94 | canvas->drawOval(r, p); |
| 95 | } |
| 96 | |
| 97 | // return; |
| 98 | |
| 99 | dump_layers("outside layer alpha", canvas); |
| 100 | |
| 101 | // now apply an effect |
| 102 | |
| 103 | SkPaint paint; |
| 104 | make_paint(&paint); |
| 105 | r.set(0, 0, SkIntToScalar(100), SkIntToScalar(20)); |
| 106 | // SkDebugf("--------- draw top grad\n"); |
| 107 | canvas->drawRect(r, paint); |
| 108 | |
| 109 | SkMatrix m; |
| 110 | SkShader* s = paint.getShader(); |
| 111 | m.setScale(SK_Scalar1, -SK_Scalar1); |
| 112 | m.postTranslate(0, SkIntToScalar(100)); |
| 113 | s->setLocalMatrix(m); |
| 114 | |
| 115 | r.fTop = SkIntToScalar(80); |
| 116 | r.fBottom = SkIntToScalar(100); |
| 117 | // SkDebugf("--------- draw bot grad\n"); |
| 118 | canvas->drawRect(r, paint); |
| 119 | } |
| 120 | |
| 121 | class RedFilter : public SkDrawFilter { |
| 122 | public: |
| 123 | virtual bool filter(SkCanvas*, SkPaint* p, SkDrawFilter::Type) { |
| 124 | fColor = p->getColor(); |
| 125 | if (fColor == SK_ColorRED) { |
| 126 | p->setColor(SK_ColorGREEN); |
| 127 | } |
| 128 | return true; |
| 129 | } |
| 130 | virtual void restore(SkCanvas*, SkPaint* p, SkDrawFilter::Type) { |
| 131 | p->setColor(fColor); |
| 132 | } |
| 133 | |
| 134 | private: |
| 135 | SkColor fColor; |
| 136 | }; |
| 137 | |
| 138 | class LayersView : public SkView { |
| 139 | public: |
| 140 | LayersView() {} |
| 141 | |
| 142 | protected: |
| 143 | // overrides from SkEventSink |
| 144 | virtual bool onQuery(SkEvent* evt) { |
| 145 | if (SampleCode::TitleQ(*evt)) { |
| 146 | SampleCode::TitleR(evt, "Layers"); |
| 147 | return true; |
| 148 | } |
| 149 | return this->INHERITED::onQuery(evt); |
| 150 | } |
| 151 | |
| 152 | void drawBG(SkCanvas* canvas) { |
| 153 | canvas->drawColor(SK_ColorWHITE); |
| 154 | } |
| 155 | |
| 156 | virtual void onDraw(SkCanvas* canvas) { |
| 157 | this->drawBG(canvas); |
| 158 | |
| 159 | if (false) { |
| 160 | SkRect r; |
| 161 | r.set(SkIntToScalar(0), SkIntToScalar(0), |
| 162 | SkIntToScalar(220), SkIntToScalar(120)); |
| 163 | SkPaint p; |
| 164 | p.setAlpha(0x88); |
| 165 | p.setAntiAlias(true); |
| 166 | |
| 167 | if (true) { |
| 168 | canvas->saveLayer(&r, &p); |
| 169 | p.setColor(0xFFFF0000); |
| 170 | canvas->drawOval(r, p); |
| 171 | canvas->restore(); |
| 172 | } |
| 173 | |
| 174 | p.setColor(0xFF0000FF); |
| 175 | r.offset(SkIntToScalar(20), SkIntToScalar(50)); |
| 176 | canvas->drawOval(r, p); |
| 177 | } |
| 178 | |
| 179 | if (false) { |
| 180 | SkPaint p; |
| 181 | p.setAlpha(0x88); |
| 182 | p.setAntiAlias(true); |
| 183 | |
| 184 | canvas->translate(SkIntToScalar(300), 0); |
| 185 | |
| 186 | SkRect r; |
| 187 | r.set(SkIntToScalar(0), SkIntToScalar(0), |
| 188 | SkIntToScalar(220), SkIntToScalar(60)); |
| 189 | |
| 190 | canvas->saveLayer(&r, &p, (SkCanvas::SaveFlags)(SkCanvas::kHasAlphaLayer_SaveFlag | SkCanvas::kFullColorLayer_SaveFlag)); |
| 191 | // canvas->clipRect(r, SkRegion::kDifference_Op); |
| 192 | // canvas->clipRect(r, SkRegion::kIntersect_Op); |
| 193 | |
| 194 | r.set(SkIntToScalar(0), SkIntToScalar(0), |
| 195 | SkIntToScalar(220), SkIntToScalar(120)); |
| 196 | p.setColor(SK_ColorBLUE); |
| 197 | canvas->drawOval(r, p); |
| 198 | canvas->restore(); |
| 199 | return; |
| 200 | } |
| 201 | |
| 202 | //canvas->translate(SkIntToScalar(20), SkIntToScalar(20)); |
| 203 | test_fade(canvas); |
| 204 | return; |
| 205 | |
| 206 | // canvas->setDrawFilter(new RedFilter)->unref(); |
| 207 | |
| 208 | SkRect r; |
| 209 | SkPaint p; |
| 210 | |
| 211 | canvas->translate(SkIntToScalar(220), SkIntToScalar(20)); |
| 212 | |
| 213 | p.setAntiAlias(true); |
| 214 | r.set(SkIntToScalar(20), SkIntToScalar(20), |
| 215 | SkIntToScalar(220), SkIntToScalar(120)); |
| 216 | |
| 217 | p.setColor(SK_ColorBLUE); |
| 218 | // p.setMaskFilter(SkBlurMaskFilter::Create(SkIntToScalar(8), SkBlurMaskFilter::kNormal_BlurStyle))->unref(); |
| 219 | canvas->drawRect(r, p); |
| 220 | p.setMaskFilter(NULL); |
| 221 | |
| 222 | SkRect bounds = r; |
| 223 | bounds.fBottom = bounds.centerY(); |
| 224 | canvas->saveLayer(&bounds, NULL, SkCanvas::kARGB_NoClipLayer_SaveFlag); |
| 225 | |
| 226 | p.setColor(SK_ColorRED); |
| 227 | canvas->drawOval(r, p); |
| 228 | |
| 229 | p.setAlpha(0x80); |
| 230 | p.setPorterDuffXfermode(SkPorterDuff::kDstIn_Mode); |
| 231 | canvas->drawRect(bounds, p); |
| 232 | |
| 233 | canvas->restore(); |
| 234 | } |
| 235 | |
| 236 | virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) { |
| 237 | this->inval(NULL); |
| 238 | |
| 239 | return this->INHERITED::onFindClickHandler(x, y); |
| 240 | } |
| 241 | |
| 242 | virtual bool onClick(Click* click) { |
| 243 | return this->INHERITED::onClick(click); |
| 244 | } |
| 245 | |
| 246 | virtual bool handleKey(SkKey key) { |
| 247 | this->inval(NULL); |
| 248 | return true; |
| 249 | } |
| 250 | |
| 251 | private: |
| 252 | typedef SkView INHERITED; |
| 253 | }; |
| 254 | |
| 255 | ////////////////////////////////////////////////////////////////////////////// |
| 256 | |
| 257 | static SkView* MyFactory() { return new LayersView; } |
| 258 | static SkViewRegister reg(MyFactory); |
| 259 | |