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 "SkGradientShader.h" |
| 5 | #include "SkPath.h" |
| 6 | #include "SkRegion.h" |
| 7 | #include "SkShader.h" |
| 8 | #include "SkUtils.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 9 | #include "SkColorPriv.h" |
| 10 | #include "SkColorFilter.h" |
| 11 | #include "SkTypeface.h" |
| 12 | #include "SkAvoidXfermode.h" |
| 13 | |
| 14 | static inline SkPMColor rgb2gray(SkPMColor c) |
| 15 | { |
| 16 | unsigned r = SkGetPackedR32(c); |
| 17 | unsigned g = SkGetPackedG32(c); |
| 18 | unsigned b = SkGetPackedB32(c); |
| 19 | |
| 20 | unsigned x = r * 5 + g * 7 + b * 4 >> 4; |
| 21 | |
| 22 | return SkPackARGB32(0, x, x, x) | (c & (SK_A32_MASK << SK_A32_SHIFT)); |
| 23 | } |
| 24 | |
| 25 | class SkGrayScaleColorFilter : public SkColorFilter { |
| 26 | public: |
| 27 | virtual void filterSpan(const SkPMColor src[], int count, SkPMColor result[]) |
| 28 | { |
| 29 | for (int i = 0; i < count; i++) |
| 30 | result[i] = rgb2gray(src[i]); |
| 31 | } |
| 32 | }; |
| 33 | |
| 34 | class SkChannelMaskColorFilter : public SkColorFilter { |
| 35 | public: |
| 36 | SkChannelMaskColorFilter(U8CPU redMask, U8CPU greenMask, U8CPU blueMask) |
| 37 | { |
| 38 | fMask = SkPackARGB32(0xFF, redMask, greenMask, blueMask); |
| 39 | } |
| 40 | |
| 41 | virtual void filterSpan(const SkPMColor src[], int count, SkPMColor result[]) |
| 42 | { |
| 43 | SkPMColor mask = fMask; |
| 44 | for (int i = 0; i < count; i++) |
| 45 | result[i] = src[i] & mask; |
| 46 | } |
| 47 | |
| 48 | private: |
| 49 | SkPMColor fMask; |
| 50 | }; |
| 51 | |
| 52 | /////////////////////////////////////////////////////////// |
| 53 | |
| 54 | #include "SkGradientShader.h" |
| 55 | #include "SkLayerRasterizer.h" |
| 56 | #include "SkBlurMaskFilter.h" |
| 57 | |
| 58 | static void r0(SkLayerRasterizer* rast, SkPaint& p) |
| 59 | { |
| 60 | p.setMaskFilter(SkBlurMaskFilter::Create(SkIntToScalar(3), |
| 61 | SkBlurMaskFilter::kNormal_BlurStyle))->unref(); |
| 62 | rast->addLayer(p, SkIntToScalar(3), SkIntToScalar(3)); |
| 63 | |
| 64 | p.setMaskFilter(NULL); |
| 65 | p.setStyle(SkPaint::kStroke_Style); |
| 66 | p.setStrokeWidth(SK_Scalar1); |
| 67 | rast->addLayer(p); |
| 68 | |
| 69 | p.setAlpha(0x11); |
| 70 | p.setStyle(SkPaint::kFill_Style); |
reed@android.com | 0baf193 | 2009-06-24 12:41:42 +0000 | [diff] [blame] | 71 | p.setXfermodeMode(SkXfermode::kSrc_Mode); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 72 | rast->addLayer(p); |
| 73 | } |
| 74 | |
| 75 | static void r1(SkLayerRasterizer* rast, SkPaint& p) |
| 76 | { |
| 77 | rast->addLayer(p); |
| 78 | |
| 79 | p.setAlpha(0x40); |
reed@android.com | 0baf193 | 2009-06-24 12:41:42 +0000 | [diff] [blame] | 80 | p.setXfermodeMode(SkXfermode::kSrc_Mode); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 81 | p.setStyle(SkPaint::kStroke_Style); |
| 82 | p.setStrokeWidth(SK_Scalar1*2); |
| 83 | rast->addLayer(p); |
| 84 | } |
| 85 | |
| 86 | static void r2(SkLayerRasterizer* rast, SkPaint& p) |
| 87 | { |
| 88 | p.setStyle(SkPaint::kStrokeAndFill_Style); |
| 89 | p.setStrokeWidth(SK_Scalar1*4); |
| 90 | rast->addLayer(p); |
| 91 | |
| 92 | p.setStyle(SkPaint::kStroke_Style); |
| 93 | p.setStrokeWidth(SK_Scalar1*3/2); |
reed@android.com | 0baf193 | 2009-06-24 12:41:42 +0000 | [diff] [blame] | 94 | p.setXfermodeMode(SkXfermode::kClear_Mode); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 95 | rast->addLayer(p); |
| 96 | } |
| 97 | |
| 98 | static void r3(SkLayerRasterizer* rast, SkPaint& p) |
| 99 | { |
| 100 | p.setStyle(SkPaint::kStroke_Style); |
| 101 | p.setStrokeWidth(SK_Scalar1*3); |
| 102 | rast->addLayer(p); |
| 103 | |
| 104 | p.setAlpha(0x20); |
| 105 | p.setStyle(SkPaint::kFill_Style); |
reed@android.com | 0baf193 | 2009-06-24 12:41:42 +0000 | [diff] [blame] | 106 | p.setXfermodeMode(SkXfermode::kSrc_Mode); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 107 | rast->addLayer(p); |
| 108 | } |
| 109 | |
| 110 | static void r4(SkLayerRasterizer* rast, SkPaint& p) |
| 111 | { |
| 112 | p.setAlpha(0x60); |
| 113 | rast->addLayer(p, SkIntToScalar(3), SkIntToScalar(3)); |
| 114 | |
| 115 | p.setAlpha(0xFF); |
reed@android.com | 0baf193 | 2009-06-24 12:41:42 +0000 | [diff] [blame] | 116 | p.setXfermodeMode(SkXfermode::kClear_Mode); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 117 | rast->addLayer(p, SK_Scalar1*3/2, SK_Scalar1*3/2); |
| 118 | |
| 119 | p.setXfermode(NULL); |
| 120 | rast->addLayer(p); |
| 121 | } |
| 122 | |
| 123 | #include "SkDiscretePathEffect.h" |
| 124 | |
| 125 | static void r5(SkLayerRasterizer* rast, SkPaint& p) |
| 126 | { |
| 127 | rast->addLayer(p); |
| 128 | |
| 129 | p.setPathEffect(new SkDiscretePathEffect(SK_Scalar1*4, SK_Scalar1*3))->unref(); |
reed@android.com | 0baf193 | 2009-06-24 12:41:42 +0000 | [diff] [blame] | 130 | p.setXfermodeMode(SkXfermode::kSrcOut_Mode); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 131 | rast->addLayer(p); |
| 132 | } |
| 133 | |
| 134 | static void r6(SkLayerRasterizer* rast, SkPaint& p) |
| 135 | { |
| 136 | rast->addLayer(p); |
| 137 | |
| 138 | p.setAntiAlias(false); |
| 139 | SkLayerRasterizer* rast2 = new SkLayerRasterizer; |
| 140 | r5(rast2, p); |
| 141 | p.setRasterizer(rast2)->unref(); |
reed@android.com | 0baf193 | 2009-06-24 12:41:42 +0000 | [diff] [blame] | 142 | p.setXfermodeMode(SkXfermode::kClear_Mode); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 143 | rast->addLayer(p); |
| 144 | } |
| 145 | |
| 146 | #include "Sk2DPathEffect.h" |
| 147 | |
| 148 | class Dot2DPathEffect : public Sk2DPathEffect { |
| 149 | public: |
| 150 | Dot2DPathEffect(SkScalar radius, const SkMatrix& matrix) |
| 151 | : Sk2DPathEffect(matrix), fRadius(radius) {} |
| 152 | |
| 153 | virtual void flatten(SkFlattenableWriteBuffer& buffer) |
| 154 | { |
| 155 | this->INHERITED::flatten(buffer); |
| 156 | |
| 157 | buffer.writeScalar(fRadius); |
| 158 | } |
| 159 | virtual Factory getFactory() { return CreateProc; } |
| 160 | |
| 161 | protected: |
| 162 | virtual void next(const SkPoint& loc, int u, int v, SkPath* dst) |
| 163 | { |
| 164 | dst->addCircle(loc.fX, loc.fY, fRadius); |
| 165 | } |
| 166 | |
| 167 | Dot2DPathEffect(SkFlattenableReadBuffer& buffer) : Sk2DPathEffect(buffer) |
| 168 | { |
| 169 | fRadius = buffer.readScalar(); |
| 170 | } |
| 171 | private: |
| 172 | SkScalar fRadius; |
| 173 | |
| 174 | static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) |
| 175 | { |
| 176 | return new Dot2DPathEffect(buffer); |
| 177 | } |
| 178 | |
| 179 | typedef Sk2DPathEffect INHERITED; |
| 180 | }; |
| 181 | |
| 182 | static void r7(SkLayerRasterizer* rast, SkPaint& p) |
| 183 | { |
| 184 | SkMatrix lattice; |
| 185 | lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0); |
| 186 | lattice.postSkew(SK_Scalar1/3, 0, 0, 0); |
| 187 | p.setPathEffect(new Dot2DPathEffect(SK_Scalar1*4, lattice))->unref(); |
| 188 | rast->addLayer(p); |
| 189 | } |
| 190 | |
| 191 | static void r8(SkLayerRasterizer* rast, SkPaint& p) |
| 192 | { |
| 193 | rast->addLayer(p); |
| 194 | |
| 195 | SkMatrix lattice; |
| 196 | lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0); |
| 197 | lattice.postSkew(SK_Scalar1/3, 0, 0, 0); |
| 198 | p.setPathEffect(new Dot2DPathEffect(SK_Scalar1*2, lattice))->unref(); |
reed@android.com | 0baf193 | 2009-06-24 12:41:42 +0000 | [diff] [blame] | 199 | p.setXfermodeMode(SkXfermode::kClear_Mode); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 200 | rast->addLayer(p); |
| 201 | |
| 202 | p.setPathEffect(NULL); |
| 203 | p.setXfermode(NULL); |
| 204 | p.setStyle(SkPaint::kStroke_Style); |
| 205 | p.setStrokeWidth(SK_Scalar1); |
| 206 | rast->addLayer(p); |
| 207 | } |
| 208 | |
| 209 | class Line2DPathEffect : public Sk2DPathEffect { |
| 210 | public: |
| 211 | Line2DPathEffect(SkScalar width, const SkMatrix& matrix) |
| 212 | : Sk2DPathEffect(matrix), fWidth(width) {} |
| 213 | |
| 214 | virtual bool filterPath(SkPath* dst, const SkPath& src, SkScalar* width) |
| 215 | { |
| 216 | if (this->INHERITED::filterPath(dst, src, width)) |
| 217 | { |
| 218 | *width = fWidth; |
| 219 | return true; |
| 220 | } |
| 221 | return false; |
| 222 | } |
| 223 | |
| 224 | virtual Factory getFactory() { return CreateProc; } |
| 225 | virtual void flatten(SkFlattenableWriteBuffer& buffer) |
| 226 | { |
| 227 | this->INHERITED::flatten(buffer); |
| 228 | buffer.writeScalar(fWidth); |
| 229 | } |
| 230 | protected: |
| 231 | virtual void nextSpan(int u, int v, int ucount, SkPath* dst) |
| 232 | { |
| 233 | if (ucount > 1) |
| 234 | { |
| 235 | SkPoint src[2], dstP[2]; |
| 236 | |
| 237 | src[0].set(SkIntToScalar(u) + SK_ScalarHalf, |
| 238 | SkIntToScalar(v) + SK_ScalarHalf); |
| 239 | src[1].set(SkIntToScalar(u+ucount) + SK_ScalarHalf, |
| 240 | SkIntToScalar(v) + SK_ScalarHalf); |
| 241 | this->getMatrix().mapPoints(dstP, src, 2); |
| 242 | |
| 243 | dst->moveTo(dstP[0]); |
| 244 | dst->lineTo(dstP[1]); |
| 245 | } |
| 246 | } |
| 247 | |
deanm@chromium.org | 1220e1c | 2009-06-11 12:26:47 +0000 | [diff] [blame] | 248 | Line2DPathEffect(SkFlattenableReadBuffer& buffer) : Sk2DPathEffect(buffer) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 249 | { |
| 250 | fWidth = buffer.readScalar(); |
| 251 | } |
| 252 | |
| 253 | private: |
| 254 | SkScalar fWidth; |
| 255 | |
| 256 | static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) |
| 257 | { |
| 258 | return new Line2DPathEffect(buffer); |
| 259 | } |
| 260 | |
| 261 | typedef Sk2DPathEffect INHERITED; |
| 262 | }; |
| 263 | |
| 264 | static void r9(SkLayerRasterizer* rast, SkPaint& p) |
| 265 | { |
| 266 | rast->addLayer(p); |
| 267 | |
| 268 | SkMatrix lattice; |
| 269 | lattice.setScale(SK_Scalar1, SK_Scalar1*6, 0, 0); |
| 270 | lattice.postRotate(SkIntToScalar(30), 0, 0); |
| 271 | p.setPathEffect(new Line2DPathEffect(SK_Scalar1*2, lattice))->unref(); |
reed@android.com | 0baf193 | 2009-06-24 12:41:42 +0000 | [diff] [blame] | 272 | p.setXfermodeMode(SkXfermode::kClear_Mode); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 273 | rast->addLayer(p); |
| 274 | |
| 275 | p.setPathEffect(NULL); |
| 276 | p.setXfermode(NULL); |
| 277 | p.setStyle(SkPaint::kStroke_Style); |
| 278 | p.setStrokeWidth(SK_Scalar1); |
| 279 | rast->addLayer(p); |
| 280 | } |
| 281 | |
| 282 | typedef void (*raster_proc)(SkLayerRasterizer*, SkPaint&); |
| 283 | |
| 284 | static const raster_proc gRastProcs[] = { |
| 285 | r0, r1, r2, r3, r4, r5, r6, r7, r8, r9 |
| 286 | }; |
| 287 | |
| 288 | static const struct { |
| 289 | SkColor fMul, fAdd; |
| 290 | } gLightingColors[] = { |
| 291 | { 0x808080, 0x800000 }, // general case |
| 292 | { 0x707070, 0x707070 }, // no-pin case |
| 293 | { 0xFFFFFF, 0x800000 }, // just-add case |
| 294 | { 0x808080, 0x000000 }, // just-mul case |
| 295 | { 0xFFFFFF, 0x000000 } // identity case |
| 296 | }; |
| 297 | |
| 298 | #include "SkXfermode.h" |
| 299 | |
| 300 | static unsigned color_dist16(uint16_t a, uint16_t b) |
| 301 | { |
| 302 | unsigned dr = SkAbs32(SkPacked16ToR32(a) - SkPacked16ToR32(b)); |
| 303 | unsigned dg = SkAbs32(SkPacked16ToG32(a) - SkPacked16ToG32(b)); |
| 304 | unsigned db = SkAbs32(SkPacked16ToB32(a) - SkPacked16ToB32(b)); |
| 305 | |
| 306 | return SkMax32(dr, SkMax32(dg, db)); |
| 307 | } |
| 308 | |
| 309 | static unsigned scale_dist(unsigned dist, unsigned scale) |
| 310 | { |
| 311 | dist >>= 6; |
| 312 | dist = (dist << 2) | dist; |
| 313 | dist = (dist << 4) | dist; |
| 314 | return dist; |
| 315 | |
| 316 | // return SkAlphaMul(dist, scale); |
| 317 | } |
| 318 | |
| 319 | static void apply_shader(SkPaint* paint, int index) |
| 320 | { |
| 321 | raster_proc proc = gRastProcs[index]; |
| 322 | if (proc) |
| 323 | { |
| 324 | SkPaint p; |
| 325 | SkLayerRasterizer* rast = new SkLayerRasterizer; |
| 326 | |
| 327 | p.setAntiAlias(true); |
| 328 | proc(rast, p); |
| 329 | paint->setRasterizer(rast)->unref(); |
| 330 | } |
| 331 | |
| 332 | #if 0 |
| 333 | SkScalar dir[] = { SK_Scalar1, SK_Scalar1, SK_Scalar1 }; |
| 334 | paint->setMaskFilter(SkBlurMaskFilter::CreateEmboss(dir, SK_Scalar1/4, SkIntToScalar(4), SkIntToScalar(3)))->unref(); |
| 335 | #endif |
| 336 | paint->setColor(SK_ColorBLUE); |
| 337 | } |
| 338 | |
| 339 | static int gRastIndex; |
| 340 | |
| 341 | class TextEffectView : public SkView { |
| 342 | SkTypeface* fFace; |
| 343 | public: |
| 344 | TextEffectView() |
| 345 | { |
| 346 | fFace = SkTypeface::CreateFromFile("/Users/reed/Downloads/p052024l.pfb"); |
| 347 | } |
| 348 | |
| 349 | virtual ~TextEffectView() |
| 350 | { |
| 351 | fFace->safeUnref(); |
| 352 | } |
| 353 | |
| 354 | protected: |
| 355 | // overrides from SkEventSink |
| 356 | virtual bool onQuery(SkEvent* evt) |
| 357 | { |
| 358 | if (SampleCode::TitleQ(*evt)) |
| 359 | { |
| 360 | SampleCode::TitleR(evt, "Text Effects"); |
| 361 | return true; |
| 362 | } |
| 363 | return this->INHERITED::onQuery(evt); |
| 364 | } |
| 365 | |
| 366 | void drawBG(SkCanvas* canvas) |
| 367 | { |
| 368 | // canvas->drawColor(0xFFDDDDDD); |
| 369 | canvas->drawColor(SK_ColorWHITE); |
| 370 | } |
| 371 | |
| 372 | virtual void onDraw(SkCanvas* canvas) |
| 373 | { |
| 374 | this->drawBG(canvas); |
| 375 | |
| 376 | canvas->save(); |
| 377 | // canvas->scale(SK_Scalar1*2, SK_Scalar1*2, 0, 0); |
| 378 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 379 | SkPaint paint; |
| 380 | |
| 381 | paint.setAntiAlias(true); |
reed@android.com | 0bb6d06 | 2010-05-17 14:50:04 +0000 | [diff] [blame^] | 382 | paint.setTextSize(SkIntToScalar(56)); |
reed@android.com | 069b827 | 2009-03-04 15:31:48 +0000 | [diff] [blame] | 383 | paint.setTypeface(SkTypeface::CreateFromName("sans-serif", |
| 384 | SkTypeface::kBold)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 385 | |
reed@android.com | 0bb6d06 | 2010-05-17 14:50:04 +0000 | [diff] [blame^] | 386 | SkScalar x = SkIntToScalar(20); |
| 387 | SkScalar y = paint.getTextSize(); |
| 388 | |
| 389 | SkString str("TextEffects"); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 390 | |
| 391 | paint.setTypeface(fFace); |
| 392 | |
| 393 | for (int i = 0; i < SK_ARRAY_COUNT(gRastProcs); i++) |
| 394 | { |
| 395 | apply_shader(&paint, i); |
| 396 | |
| 397 | // paint.setMaskFilter(NULL); |
| 398 | // paint.setColor(SK_ColorBLACK); |
| 399 | |
| 400 | #if 0 |
| 401 | int index = i % SK_ARRAY_COUNT(gLightingColors); |
| 402 | paint.setColorFilter(SkColorFilter::CreateLightingFilter( |
| 403 | gLightingColors[index].fMul, |
| 404 | gLightingColors[index].fAdd))->unref(); |
| 405 | #endif |
| 406 | |
| 407 | canvas->drawText(str.c_str(), str.size(), x, y, paint); |
| 408 | |
| 409 | if (0) |
| 410 | { |
| 411 | SkPath path; |
| 412 | paint.getTextPath(str.c_str(), str.size(), x + SkIntToScalar(260), y, &path); |
| 413 | canvas->drawPath(path, paint); |
| 414 | } |
| 415 | |
| 416 | y += paint.getFontSpacing(); |
| 417 | } |
| 418 | |
| 419 | canvas->restore(); |
| 420 | |
| 421 | if (0) |
| 422 | { |
| 423 | SkPoint pts[] = { 0, 0, 0, SkIntToScalar(150) }; |
| 424 | SkColor colors[] = { 0xFFE6E6E6, 0xFFFFFFFF }; |
| 425 | SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode); |
| 426 | |
| 427 | paint.reset(); |
| 428 | paint.setShader(s); |
| 429 | canvas->drawRectCoords(0, 0, SkIntToScalar(120), SkIntToScalar(150), paint); |
| 430 | } |
| 431 | |
reed@android.com | 0bb6d06 | 2010-05-17 14:50:04 +0000 | [diff] [blame^] | 432 | if (0) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 433 | { |
| 434 | SkAvoidXfermode mode(SK_ColorWHITE, 0xFF, |
| 435 | SkAvoidXfermode::kTargetColor_Mode); |
| 436 | SkPaint paint; |
| 437 | x += SkIntToScalar(20); |
| 438 | SkRect r = { x, 0, x + SkIntToScalar(360), SkIntToScalar(700) }; |
| 439 | paint.setXfermode(&mode); |
| 440 | paint.setColor(SK_ColorGREEN); |
| 441 | paint.setAntiAlias(true); |
| 442 | canvas->drawOval(r, paint); |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) |
| 447 | { |
| 448 | gRastIndex = (gRastIndex + 1) % SK_ARRAY_COUNT(gRastProcs); |
| 449 | this->inval(NULL); |
| 450 | |
| 451 | return this->INHERITED::onFindClickHandler(x, y); |
| 452 | } |
| 453 | |
| 454 | virtual bool onClick(Click* click) |
| 455 | { |
| 456 | return this->INHERITED::onClick(click); |
| 457 | } |
| 458 | |
| 459 | private: |
| 460 | typedef SkView INHERITED; |
| 461 | }; |
| 462 | |
| 463 | ////////////////////////////////////////////////////////////////////////////// |
| 464 | |
| 465 | static SkView* MyFactory() { return new TextEffectView; } |
| 466 | static SkViewRegister reg(MyFactory); |
| 467 | |