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" |
| 9 | #include "SkShaderExtras.h" |
| 10 | #include "SkColorPriv.h" |
| 11 | #include "SkColorFilter.h" |
| 12 | #include "SkTypeface.h" |
| 13 | #include "SkAvoidXfermode.h" |
| 14 | |
| 15 | static inline SkPMColor rgb2gray(SkPMColor c) |
| 16 | { |
| 17 | unsigned r = SkGetPackedR32(c); |
| 18 | unsigned g = SkGetPackedG32(c); |
| 19 | unsigned b = SkGetPackedB32(c); |
| 20 | |
| 21 | unsigned x = r * 5 + g * 7 + b * 4 >> 4; |
| 22 | |
| 23 | return SkPackARGB32(0, x, x, x) | (c & (SK_A32_MASK << SK_A32_SHIFT)); |
| 24 | } |
| 25 | |
| 26 | class SkGrayScaleColorFilter : public SkColorFilter { |
| 27 | public: |
| 28 | virtual void filterSpan(const SkPMColor src[], int count, SkPMColor result[]) |
| 29 | { |
| 30 | for (int i = 0; i < count; i++) |
| 31 | result[i] = rgb2gray(src[i]); |
| 32 | } |
| 33 | }; |
| 34 | |
| 35 | class SkChannelMaskColorFilter : public SkColorFilter { |
| 36 | public: |
| 37 | SkChannelMaskColorFilter(U8CPU redMask, U8CPU greenMask, U8CPU blueMask) |
| 38 | { |
| 39 | fMask = SkPackARGB32(0xFF, redMask, greenMask, blueMask); |
| 40 | } |
| 41 | |
| 42 | virtual void filterSpan(const SkPMColor src[], int count, SkPMColor result[]) |
| 43 | { |
| 44 | SkPMColor mask = fMask; |
| 45 | for (int i = 0; i < count; i++) |
| 46 | result[i] = src[i] & mask; |
| 47 | } |
| 48 | |
| 49 | private: |
| 50 | SkPMColor fMask; |
| 51 | }; |
| 52 | |
| 53 | /////////////////////////////////////////////////////////// |
| 54 | |
| 55 | #include "SkGradientShader.h" |
| 56 | #include "SkLayerRasterizer.h" |
| 57 | #include "SkBlurMaskFilter.h" |
| 58 | |
| 59 | static void r0(SkLayerRasterizer* rast, SkPaint& p) |
| 60 | { |
| 61 | p.setMaskFilter(SkBlurMaskFilter::Create(SkIntToScalar(3), |
| 62 | SkBlurMaskFilter::kNormal_BlurStyle))->unref(); |
| 63 | rast->addLayer(p, SkIntToScalar(3), SkIntToScalar(3)); |
| 64 | |
| 65 | p.setMaskFilter(NULL); |
| 66 | p.setStyle(SkPaint::kStroke_Style); |
| 67 | p.setStrokeWidth(SK_Scalar1); |
| 68 | rast->addLayer(p); |
| 69 | |
| 70 | p.setAlpha(0x11); |
| 71 | p.setStyle(SkPaint::kFill_Style); |
| 72 | p.setPorterDuffXfermode(SkPorterDuff::kSrc_Mode); |
| 73 | rast->addLayer(p); |
| 74 | } |
| 75 | |
| 76 | static void r1(SkLayerRasterizer* rast, SkPaint& p) |
| 77 | { |
| 78 | rast->addLayer(p); |
| 79 | |
| 80 | p.setAlpha(0x40); |
| 81 | p.setPorterDuffXfermode(SkPorterDuff::kSrc_Mode); |
| 82 | p.setStyle(SkPaint::kStroke_Style); |
| 83 | p.setStrokeWidth(SK_Scalar1*2); |
| 84 | rast->addLayer(p); |
| 85 | } |
| 86 | |
| 87 | static void r2(SkLayerRasterizer* rast, SkPaint& p) |
| 88 | { |
| 89 | p.setStyle(SkPaint::kStrokeAndFill_Style); |
| 90 | p.setStrokeWidth(SK_Scalar1*4); |
| 91 | rast->addLayer(p); |
| 92 | |
| 93 | p.setStyle(SkPaint::kStroke_Style); |
| 94 | p.setStrokeWidth(SK_Scalar1*3/2); |
| 95 | p.setPorterDuffXfermode(SkPorterDuff::kClear_Mode); |
| 96 | rast->addLayer(p); |
| 97 | } |
| 98 | |
| 99 | static void r3(SkLayerRasterizer* rast, SkPaint& p) |
| 100 | { |
| 101 | p.setStyle(SkPaint::kStroke_Style); |
| 102 | p.setStrokeWidth(SK_Scalar1*3); |
| 103 | rast->addLayer(p); |
| 104 | |
| 105 | p.setAlpha(0x20); |
| 106 | p.setStyle(SkPaint::kFill_Style); |
| 107 | p.setPorterDuffXfermode(SkPorterDuff::kSrc_Mode); |
| 108 | rast->addLayer(p); |
| 109 | } |
| 110 | |
| 111 | static void r4(SkLayerRasterizer* rast, SkPaint& p) |
| 112 | { |
| 113 | p.setAlpha(0x60); |
| 114 | rast->addLayer(p, SkIntToScalar(3), SkIntToScalar(3)); |
| 115 | |
| 116 | p.setAlpha(0xFF); |
| 117 | p.setPorterDuffXfermode(SkPorterDuff::kClear_Mode); |
| 118 | rast->addLayer(p, SK_Scalar1*3/2, SK_Scalar1*3/2); |
| 119 | |
| 120 | p.setXfermode(NULL); |
| 121 | rast->addLayer(p); |
| 122 | } |
| 123 | |
| 124 | #include "SkDiscretePathEffect.h" |
| 125 | |
| 126 | static void r5(SkLayerRasterizer* rast, SkPaint& p) |
| 127 | { |
| 128 | rast->addLayer(p); |
| 129 | |
| 130 | p.setPathEffect(new SkDiscretePathEffect(SK_Scalar1*4, SK_Scalar1*3))->unref(); |
| 131 | p.setPorterDuffXfermode(SkPorterDuff::kSrcOut_Mode); |
| 132 | rast->addLayer(p); |
| 133 | } |
| 134 | |
| 135 | static void r6(SkLayerRasterizer* rast, SkPaint& p) |
| 136 | { |
| 137 | rast->addLayer(p); |
| 138 | |
| 139 | p.setAntiAlias(false); |
| 140 | SkLayerRasterizer* rast2 = new SkLayerRasterizer; |
| 141 | r5(rast2, p); |
| 142 | p.setRasterizer(rast2)->unref(); |
| 143 | p.setPorterDuffXfermode(SkPorterDuff::kClear_Mode); |
| 144 | rast->addLayer(p); |
| 145 | } |
| 146 | |
| 147 | #include "Sk2DPathEffect.h" |
| 148 | |
| 149 | class Dot2DPathEffect : public Sk2DPathEffect { |
| 150 | public: |
| 151 | Dot2DPathEffect(SkScalar radius, const SkMatrix& matrix) |
| 152 | : Sk2DPathEffect(matrix), fRadius(radius) {} |
| 153 | |
| 154 | virtual void flatten(SkFlattenableWriteBuffer& buffer) |
| 155 | { |
| 156 | this->INHERITED::flatten(buffer); |
| 157 | |
| 158 | buffer.writeScalar(fRadius); |
| 159 | } |
| 160 | virtual Factory getFactory() { return CreateProc; } |
| 161 | |
| 162 | protected: |
| 163 | virtual void next(const SkPoint& loc, int u, int v, SkPath* dst) |
| 164 | { |
| 165 | dst->addCircle(loc.fX, loc.fY, fRadius); |
| 166 | } |
| 167 | |
| 168 | Dot2DPathEffect(SkFlattenableReadBuffer& buffer) : Sk2DPathEffect(buffer) |
| 169 | { |
| 170 | fRadius = buffer.readScalar(); |
| 171 | } |
| 172 | private: |
| 173 | SkScalar fRadius; |
| 174 | |
| 175 | static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) |
| 176 | { |
| 177 | return new Dot2DPathEffect(buffer); |
| 178 | } |
| 179 | |
| 180 | typedef Sk2DPathEffect INHERITED; |
| 181 | }; |
| 182 | |
| 183 | static void r7(SkLayerRasterizer* rast, SkPaint& p) |
| 184 | { |
| 185 | SkMatrix lattice; |
| 186 | lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0); |
| 187 | lattice.postSkew(SK_Scalar1/3, 0, 0, 0); |
| 188 | p.setPathEffect(new Dot2DPathEffect(SK_Scalar1*4, lattice))->unref(); |
| 189 | rast->addLayer(p); |
| 190 | } |
| 191 | |
| 192 | static void r8(SkLayerRasterizer* rast, SkPaint& p) |
| 193 | { |
| 194 | rast->addLayer(p); |
| 195 | |
| 196 | SkMatrix lattice; |
| 197 | lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0); |
| 198 | lattice.postSkew(SK_Scalar1/3, 0, 0, 0); |
| 199 | p.setPathEffect(new Dot2DPathEffect(SK_Scalar1*2, lattice))->unref(); |
| 200 | p.setPorterDuffXfermode(SkPorterDuff::kClear_Mode); |
| 201 | rast->addLayer(p); |
| 202 | |
| 203 | p.setPathEffect(NULL); |
| 204 | p.setXfermode(NULL); |
| 205 | p.setStyle(SkPaint::kStroke_Style); |
| 206 | p.setStrokeWidth(SK_Scalar1); |
| 207 | rast->addLayer(p); |
| 208 | } |
| 209 | |
| 210 | class Line2DPathEffect : public Sk2DPathEffect { |
| 211 | public: |
| 212 | Line2DPathEffect(SkScalar width, const SkMatrix& matrix) |
| 213 | : Sk2DPathEffect(matrix), fWidth(width) {} |
| 214 | |
| 215 | virtual bool filterPath(SkPath* dst, const SkPath& src, SkScalar* width) |
| 216 | { |
| 217 | if (this->INHERITED::filterPath(dst, src, width)) |
| 218 | { |
| 219 | *width = fWidth; |
| 220 | return true; |
| 221 | } |
| 222 | return false; |
| 223 | } |
| 224 | |
| 225 | virtual Factory getFactory() { return CreateProc; } |
| 226 | virtual void flatten(SkFlattenableWriteBuffer& buffer) |
| 227 | { |
| 228 | this->INHERITED::flatten(buffer); |
| 229 | buffer.writeScalar(fWidth); |
| 230 | } |
| 231 | protected: |
| 232 | virtual void nextSpan(int u, int v, int ucount, SkPath* dst) |
| 233 | { |
| 234 | if (ucount > 1) |
| 235 | { |
| 236 | SkPoint src[2], dstP[2]; |
| 237 | |
| 238 | src[0].set(SkIntToScalar(u) + SK_ScalarHalf, |
| 239 | SkIntToScalar(v) + SK_ScalarHalf); |
| 240 | src[1].set(SkIntToScalar(u+ucount) + SK_ScalarHalf, |
| 241 | SkIntToScalar(v) + SK_ScalarHalf); |
| 242 | this->getMatrix().mapPoints(dstP, src, 2); |
| 243 | |
| 244 | dst->moveTo(dstP[0]); |
| 245 | dst->lineTo(dstP[1]); |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | Line2DPathEffect::Line2DPathEffect(SkFlattenableReadBuffer& buffer) : Sk2DPathEffect(buffer) |
| 250 | { |
| 251 | fWidth = buffer.readScalar(); |
| 252 | } |
| 253 | |
| 254 | private: |
| 255 | SkScalar fWidth; |
| 256 | |
| 257 | static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) |
| 258 | { |
| 259 | return new Line2DPathEffect(buffer); |
| 260 | } |
| 261 | |
| 262 | typedef Sk2DPathEffect INHERITED; |
| 263 | }; |
| 264 | |
| 265 | static void r9(SkLayerRasterizer* rast, SkPaint& p) |
| 266 | { |
| 267 | rast->addLayer(p); |
| 268 | |
| 269 | SkMatrix lattice; |
| 270 | lattice.setScale(SK_Scalar1, SK_Scalar1*6, 0, 0); |
| 271 | lattice.postRotate(SkIntToScalar(30), 0, 0); |
| 272 | p.setPathEffect(new Line2DPathEffect(SK_Scalar1*2, lattice))->unref(); |
| 273 | p.setPorterDuffXfermode(SkPorterDuff::kClear_Mode); |
| 274 | rast->addLayer(p); |
| 275 | |
| 276 | p.setPathEffect(NULL); |
| 277 | p.setXfermode(NULL); |
| 278 | p.setStyle(SkPaint::kStroke_Style); |
| 279 | p.setStrokeWidth(SK_Scalar1); |
| 280 | rast->addLayer(p); |
| 281 | } |
| 282 | |
| 283 | typedef void (*raster_proc)(SkLayerRasterizer*, SkPaint&); |
| 284 | |
| 285 | static const raster_proc gRastProcs[] = { |
| 286 | r0, r1, r2, r3, r4, r5, r6, r7, r8, r9 |
| 287 | }; |
| 288 | |
| 289 | static const struct { |
| 290 | SkColor fMul, fAdd; |
| 291 | } gLightingColors[] = { |
| 292 | { 0x808080, 0x800000 }, // general case |
| 293 | { 0x707070, 0x707070 }, // no-pin case |
| 294 | { 0xFFFFFF, 0x800000 }, // just-add case |
| 295 | { 0x808080, 0x000000 }, // just-mul case |
| 296 | { 0xFFFFFF, 0x000000 } // identity case |
| 297 | }; |
| 298 | |
| 299 | #include "SkXfermode.h" |
| 300 | |
| 301 | static unsigned color_dist16(uint16_t a, uint16_t b) |
| 302 | { |
| 303 | unsigned dr = SkAbs32(SkPacked16ToR32(a) - SkPacked16ToR32(b)); |
| 304 | unsigned dg = SkAbs32(SkPacked16ToG32(a) - SkPacked16ToG32(b)); |
| 305 | unsigned db = SkAbs32(SkPacked16ToB32(a) - SkPacked16ToB32(b)); |
| 306 | |
| 307 | return SkMax32(dr, SkMax32(dg, db)); |
| 308 | } |
| 309 | |
| 310 | static unsigned scale_dist(unsigned dist, unsigned scale) |
| 311 | { |
| 312 | dist >>= 6; |
| 313 | dist = (dist << 2) | dist; |
| 314 | dist = (dist << 4) | dist; |
| 315 | return dist; |
| 316 | |
| 317 | // return SkAlphaMul(dist, scale); |
| 318 | } |
| 319 | |
| 320 | static void apply_shader(SkPaint* paint, int index) |
| 321 | { |
| 322 | raster_proc proc = gRastProcs[index]; |
| 323 | if (proc) |
| 324 | { |
| 325 | SkPaint p; |
| 326 | SkLayerRasterizer* rast = new SkLayerRasterizer; |
| 327 | |
| 328 | p.setAntiAlias(true); |
| 329 | proc(rast, p); |
| 330 | paint->setRasterizer(rast)->unref(); |
| 331 | } |
| 332 | |
| 333 | #if 0 |
| 334 | SkScalar dir[] = { SK_Scalar1, SK_Scalar1, SK_Scalar1 }; |
| 335 | paint->setMaskFilter(SkBlurMaskFilter::CreateEmboss(dir, SK_Scalar1/4, SkIntToScalar(4), SkIntToScalar(3)))->unref(); |
| 336 | #endif |
| 337 | paint->setColor(SK_ColorBLUE); |
| 338 | } |
| 339 | |
| 340 | static int gRastIndex; |
| 341 | |
| 342 | class TextEffectView : public SkView { |
| 343 | SkTypeface* fFace; |
| 344 | public: |
| 345 | TextEffectView() |
| 346 | { |
| 347 | fFace = SkTypeface::CreateFromFile("/Users/reed/Downloads/p052024l.pfb"); |
| 348 | } |
| 349 | |
| 350 | virtual ~TextEffectView() |
| 351 | { |
| 352 | fFace->safeUnref(); |
| 353 | } |
| 354 | |
| 355 | protected: |
| 356 | // overrides from SkEventSink |
| 357 | virtual bool onQuery(SkEvent* evt) |
| 358 | { |
| 359 | if (SampleCode::TitleQ(*evt)) |
| 360 | { |
| 361 | SampleCode::TitleR(evt, "Text Effects"); |
| 362 | return true; |
| 363 | } |
| 364 | return this->INHERITED::onQuery(evt); |
| 365 | } |
| 366 | |
| 367 | void drawBG(SkCanvas* canvas) |
| 368 | { |
| 369 | // canvas->drawColor(0xFFDDDDDD); |
| 370 | canvas->drawColor(SK_ColorWHITE); |
| 371 | } |
| 372 | |
| 373 | virtual void onDraw(SkCanvas* canvas) |
| 374 | { |
| 375 | this->drawBG(canvas); |
| 376 | |
| 377 | canvas->save(); |
| 378 | // canvas->scale(SK_Scalar1*2, SK_Scalar1*2, 0, 0); |
| 379 | |
| 380 | SkScalar x = SkIntToScalar(20); |
| 381 | SkScalar y = SkIntToScalar(40); |
| 382 | SkPaint paint; |
| 383 | |
| 384 | paint.setAntiAlias(true); |
| 385 | paint.setTextSize(SkIntToScalar(48)); |
| 386 | paint.setTypeface(SkTypeface::Create("sans-serif", SkTypeface::kBold)); |
| 387 | |
| 388 | SkString str("GOOGLE "); |
| 389 | str.appendUnichar(0x5700); |
| 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 | |
| 432 | if (1) |
| 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 | |