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comparison: gfx/skia/trunk/src/core/SkCanvas.cpp
gfx/skia/trunk/src/core/SkCanvas.cpp
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| 1 | |
| 2 /* | |
| 3 * Copyright 2008 The Android Open Source Project | |
| 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 | |
| 9 | |
| 10 #include "SkCanvas.h" | |
| 11 #include "SkBitmapDevice.h" | |
| 12 #include "SkBounder.h" | |
| 13 #include "SkDeviceImageFilterProxy.h" | |
| 14 #include "SkDraw.h" | |
| 15 #include "SkDrawFilter.h" | |
| 16 #include "SkDrawLooper.h" | |
| 17 #include "SkMetaData.h" | |
| 18 #include "SkPathOps.h" | |
| 19 #include "SkPicture.h" | |
| 20 #include "SkRasterClip.h" | |
| 21 #include "SkRRect.h" | |
| 22 #include "SkSmallAllocator.h" | |
| 23 #include "SkSurface_Base.h" | |
| 24 #include "SkTemplates.h" | |
| 25 #include "SkTextFormatParams.h" | |
| 26 #include "SkTLazy.h" | |
| 27 #include "SkUtils.h" | |
| 28 | |
| 29 #if SK_SUPPORT_GPU | |
| 30 #include "GrRenderTarget.h" | |
| 31 #endif | |
| 32 | |
| 33 // experimental for faster tiled drawing... | |
| 34 //#define SK_ENABLE_CLIP_QUICKREJECT | |
| 35 | |
| 36 //#define SK_TRACE_SAVERESTORE | |
| 37 | |
| 38 #ifdef SK_TRACE_SAVERESTORE | |
| 39 static int gLayerCounter; | |
| 40 static void inc_layer() { ++gLayerCounter; printf("----- inc layer %d\n", gLayerCounter); } | |
| 41 static void dec_layer() { --gLayerCounter; printf("----- dec layer %d\n", gLayerCounter); } | |
| 42 | |
| 43 static int gRecCounter; | |
| 44 static void inc_rec() { ++gRecCounter; printf("----- inc rec %d\n", gRecCounter); } | |
| 45 static void dec_rec() { --gRecCounter; printf("----- dec rec %d\n", gRecCounter); } | |
| 46 | |
| 47 static int gCanvasCounter; | |
| 48 static void inc_canvas() { ++gCanvasCounter; printf("----- inc canvas %d\n", gCanvasCounter); } | |
| 49 static void dec_canvas() { --gCanvasCounter; printf("----- dec canvas %d\n", gCanvasCounter); } | |
| 50 #else | |
| 51 #define inc_layer() | |
| 52 #define dec_layer() | |
| 53 #define inc_rec() | |
| 54 #define dec_rec() | |
| 55 #define inc_canvas() | |
| 56 #define dec_canvas() | |
| 57 #endif | |
| 58 | |
| 59 #ifdef SK_DEBUG | |
| 60 #include "SkPixelRef.h" | |
| 61 | |
| 62 /* | |
| 63 * Some pixelref subclasses can support being "locked" from another thread | |
| 64 * during the lock-scope of skia calling them. In these instances, this balance | |
| 65 * check will fail, but may not be indicative of a problem, so we allow a build | |
| 66 * flag to disable this check. | |
| 67 * | |
| 68 * Potentially another fix would be to have a (debug-only) virtual or flag on | |
| 69 * pixelref, which could tell us at runtime if this check is valid. That would | |
| 70 * eliminate the need for this heavy-handed build check. | |
| 71 */ | |
| 72 #ifdef SK_DISABLE_PIXELREF_LOCKCOUNT_BALANCE_CHECK | |
| 73 class AutoCheckLockCountBalance { | |
| 74 public: | |
| 75 AutoCheckLockCountBalance(const SkBitmap&) { /* do nothing */ } | |
| 76 }; | |
| 77 #else | |
| 78 class AutoCheckLockCountBalance { | |
| 79 public: | |
| 80 AutoCheckLockCountBalance(const SkBitmap& bm) : fPixelRef(bm.pixelRef()) { | |
| 81 fLockCount = fPixelRef ? fPixelRef->getLockCount() : 0; | |
| 82 } | |
| 83 ~AutoCheckLockCountBalance() { | |
| 84 const int count = fPixelRef ? fPixelRef->getLockCount() : 0; | |
| 85 SkASSERT(count == fLockCount); | |
| 86 } | |
| 87 | |
| 88 private: | |
| 89 const SkPixelRef* fPixelRef; | |
| 90 int fLockCount; | |
| 91 }; | |
| 92 #endif | |
| 93 | |
| 94 class AutoCheckNoSetContext { | |
| 95 public: | |
| 96 AutoCheckNoSetContext(const SkPaint& paint) : fPaint(paint) { | |
| 97 this->assertNoSetContext(fPaint); | |
| 98 } | |
| 99 ~AutoCheckNoSetContext() { | |
| 100 this->assertNoSetContext(fPaint); | |
| 101 } | |
| 102 | |
| 103 private: | |
| 104 const SkPaint& fPaint; | |
| 105 | |
| 106 void assertNoSetContext(const SkPaint& paint) { | |
| 107 SkShader* s = paint.getShader(); | |
| 108 if (s) { | |
| 109 SkASSERT(!s->setContextHasBeenCalled()); | |
| 110 } | |
| 111 } | |
| 112 }; | |
| 113 | |
| 114 #define CHECK_LOCKCOUNT_BALANCE(bitmap) AutoCheckLockCountBalance clcb(bitmap) | |
| 115 #define CHECK_SHADER_NOSETCONTEXT(paint) AutoCheckNoSetContext cshsc(paint) | |
| 116 | |
| 117 #else | |
| 118 #define CHECK_LOCKCOUNT_BALANCE(bitmap) | |
| 119 #define CHECK_SHADER_NOSETCONTEXT(paint) | |
| 120 #endif | |
| 121 | |
| 122 typedef SkTLazy<SkPaint> SkLazyPaint; | |
| 123 | |
| 124 void SkCanvas::predrawNotify() { | |
| 125 if (fSurfaceBase) { | |
| 126 fSurfaceBase->aboutToDraw(SkSurface::kRetain_ContentChangeMode); | |
| 127 } | |
| 128 } | |
| 129 | |
| 130 /////////////////////////////////////////////////////////////////////////////// | |
| 131 | |
| 132 /* This is the record we keep for each SkBaseDevice that the user installs. | |
| 133 The clip/matrix/proc are fields that reflect the top of the save/restore | |
| 134 stack. Whenever the canvas changes, it marks a dirty flag, and then before | |
| 135 these are used (assuming we're not on a layer) we rebuild these cache | |
| 136 values: they reflect the top of the save stack, but translated and clipped | |
| 137 by the device's XY offset and bitmap-bounds. | |
| 138 */ | |
| 139 struct DeviceCM { | |
| 140 DeviceCM* fNext; | |
| 141 SkBaseDevice* fDevice; | |
| 142 SkRasterClip fClip; | |
| 143 const SkMatrix* fMatrix; | |
| 144 SkPaint* fPaint; // may be null (in the future) | |
| 145 | |
| 146 DeviceCM(SkBaseDevice* device, int x, int y, const SkPaint* paint, SkCanvas* canvas) | |
| 147 : fNext(NULL) { | |
| 148 if (NULL != device) { | |
| 149 device->ref(); | |
| 150 device->onAttachToCanvas(canvas); | |
| 151 } | |
| 152 fDevice = device; | |
| 153 fPaint = paint ? SkNEW_ARGS(SkPaint, (*paint)) : NULL; | |
| 154 } | |
| 155 | |
| 156 ~DeviceCM() { | |
| 157 if (NULL != fDevice) { | |
| 158 fDevice->onDetachFromCanvas(); | |
| 159 fDevice->unref(); | |
| 160 } | |
| 161 SkDELETE(fPaint); | |
| 162 } | |
| 163 | |
| 164 void updateMC(const SkMatrix& totalMatrix, const SkRasterClip& totalClip, | |
| 165 const SkClipStack& clipStack, SkRasterClip* updateClip) { | |
| 166 int x = fDevice->getOrigin().x(); | |
| 167 int y = fDevice->getOrigin().y(); | |
| 168 int width = fDevice->width(); | |
| 169 int height = fDevice->height(); | |
| 170 | |
| 171 if ((x | y) == 0) { | |
| 172 fMatrix = &totalMatrix; | |
| 173 fClip = totalClip; | |
| 174 } else { | |
| 175 fMatrixStorage = totalMatrix; | |
| 176 fMatrixStorage.postTranslate(SkIntToScalar(-x), | |
| 177 SkIntToScalar(-y)); | |
| 178 fMatrix = &fMatrixStorage; | |
| 179 | |
| 180 totalClip.translate(-x, -y, &fClip); | |
| 181 } | |
| 182 | |
| 183 fClip.op(SkIRect::MakeWH(width, height), SkRegion::kIntersect_Op); | |
| 184 | |
| 185 // intersect clip, but don't translate it (yet) | |
| 186 | |
| 187 if (updateClip) { | |
| 188 updateClip->op(SkIRect::MakeXYWH(x, y, width, height), | |
| 189 SkRegion::kDifference_Op); | |
| 190 } | |
| 191 | |
| 192 fDevice->setMatrixClip(*fMatrix, fClip.forceGetBW(), clipStack); | |
| 193 | |
| 194 #ifdef SK_DEBUG | |
| 195 if (!fClip.isEmpty()) { | |
| 196 SkIRect deviceR; | |
| 197 deviceR.set(0, 0, width, height); | |
| 198 SkASSERT(deviceR.contains(fClip.getBounds())); | |
| 199 } | |
| 200 #endif | |
| 201 } | |
| 202 | |
| 203 private: | |
| 204 SkMatrix fMatrixStorage; | |
| 205 }; | |
| 206 | |
| 207 /* This is the record we keep for each save/restore level in the stack. | |
| 208 Since a level optionally copies the matrix and/or stack, we have pointers | |
| 209 for these fields. If the value is copied for this level, the copy is | |
| 210 stored in the ...Storage field, and the pointer points to that. If the | |
| 211 value is not copied for this level, we ignore ...Storage, and just point | |
| 212 at the corresponding value in the previous level in the stack. | |
| 213 */ | |
| 214 class SkCanvas::MCRec { | |
| 215 public: | |
| 216 int fFlags; | |
| 217 SkMatrix* fMatrix; // points to either fMatrixStorage or prev MCRec | |
| 218 SkRasterClip* fRasterClip; // points to either fRegionStorage or prev MCRec | |
| 219 SkDrawFilter* fFilter; // the current filter (or null) | |
| 220 | |
| 221 DeviceCM* fLayer; | |
| 222 /* If there are any layers in the stack, this points to the top-most | |
| 223 one that is at or below this level in the stack (so we know what | |
| 224 bitmap/device to draw into from this level. This value is NOT | |
| 225 reference counted, since the real owner is either our fLayer field, | |
| 226 or a previous one in a lower level.) | |
| 227 */ | |
| 228 DeviceCM* fTopLayer; | |
| 229 | |
| 230 MCRec(const MCRec* prev, int flags) : fFlags(flags) { | |
| 231 if (NULL != prev) { | |
| 232 if (flags & SkCanvas::kMatrix_SaveFlag) { | |
| 233 fMatrixStorage = *prev->fMatrix; | |
| 234 fMatrix = &fMatrixStorage; | |
| 235 } else { | |
| 236 fMatrix = prev->fMatrix; | |
| 237 } | |
| 238 | |
| 239 if (flags & SkCanvas::kClip_SaveFlag) { | |
| 240 fRasterClipStorage = *prev->fRasterClip; | |
| 241 fRasterClip = &fRasterClipStorage; | |
| 242 } else { | |
| 243 fRasterClip = prev->fRasterClip; | |
| 244 } | |
| 245 | |
| 246 fFilter = prev->fFilter; | |
| 247 SkSafeRef(fFilter); | |
| 248 | |
| 249 fTopLayer = prev->fTopLayer; | |
| 250 } else { // no prev | |
| 251 fMatrixStorage.reset(); | |
| 252 | |
| 253 fMatrix = &fMatrixStorage; | |
| 254 fRasterClip = &fRasterClipStorage; | |
| 255 fFilter = NULL; | |
| 256 fTopLayer = NULL; | |
| 257 } | |
| 258 fLayer = NULL; | |
| 259 | |
| 260 // don't bother initializing fNext | |
| 261 inc_rec(); | |
| 262 } | |
| 263 ~MCRec() { | |
| 264 SkSafeUnref(fFilter); | |
| 265 SkDELETE(fLayer); | |
| 266 dec_rec(); | |
| 267 } | |
| 268 | |
| 269 private: | |
| 270 SkMatrix fMatrixStorage; | |
| 271 SkRasterClip fRasterClipStorage; | |
| 272 }; | |
| 273 | |
| 274 class SkDrawIter : public SkDraw { | |
| 275 public: | |
| 276 SkDrawIter(SkCanvas* canvas, bool skipEmptyClips = true) { | |
| 277 canvas = canvas->canvasForDrawIter(); | |
| 278 fCanvas = canvas; | |
| 279 canvas->updateDeviceCMCache(); | |
| 280 | |
| 281 fClipStack = &canvas->fClipStack; | |
| 282 fBounder = canvas->getBounder(); | |
| 283 fCurrLayer = canvas->fMCRec->fTopLayer; | |
| 284 fSkipEmptyClips = skipEmptyClips; | |
| 285 } | |
| 286 | |
| 287 bool next() { | |
| 288 // skip over recs with empty clips | |
| 289 if (fSkipEmptyClips) { | |
| 290 while (fCurrLayer && fCurrLayer->fClip.isEmpty()) { | |
| 291 fCurrLayer = fCurrLayer->fNext; | |
| 292 } | |
| 293 } | |
| 294 | |
| 295 const DeviceCM* rec = fCurrLayer; | |
| 296 if (rec && rec->fDevice) { | |
| 297 | |
| 298 fMatrix = rec->fMatrix; | |
| 299 fClip = &((SkRasterClip*)&rec->fClip)->forceGetBW(); | |
| 300 fRC = &rec->fClip; | |
| 301 fDevice = rec->fDevice; | |
| 302 fBitmap = &fDevice->accessBitmap(true); | |
| 303 fPaint = rec->fPaint; | |
| 304 SkDEBUGCODE(this->validate();) | |
| 305 | |
| 306 fCurrLayer = rec->fNext; | |
| 307 if (fBounder) { | |
| 308 fBounder->setClip(fClip); | |
| 309 } | |
| 310 // fCurrLayer may be NULL now | |
| 311 | |
| 312 return true; | |
| 313 } | |
| 314 return false; | |
| 315 } | |
| 316 | |
| 317 SkBaseDevice* getDevice() const { return fDevice; } | |
| 318 int getX() const { return fDevice->getOrigin().x(); } | |
| 319 int getY() const { return fDevice->getOrigin().y(); } | |
| 320 const SkMatrix& getMatrix() const { return *fMatrix; } | |
| 321 const SkRegion& getClip() const { return *fClip; } | |
| 322 const SkPaint* getPaint() const { return fPaint; } | |
| 323 | |
| 324 private: | |
| 325 SkCanvas* fCanvas; | |
| 326 const DeviceCM* fCurrLayer; | |
| 327 const SkPaint* fPaint; // May be null. | |
| 328 SkBool8 fSkipEmptyClips; | |
| 329 | |
| 330 typedef SkDraw INHERITED; | |
| 331 }; | |
| 332 | |
| 333 ///////////////////////////////////////////////////////////////////////////// | |
| 334 | |
| 335 class AutoDrawLooper { | |
| 336 public: | |
| 337 AutoDrawLooper(SkCanvas* canvas, const SkPaint& paint, | |
| 338 bool skipLayerForImageFilter = false, | |
| 339 const SkRect* bounds = NULL) : fOrigPaint(paint) { | |
| 340 fCanvas = canvas; | |
| 341 fFilter = canvas->getDrawFilter(); | |
| 342 fPaint = NULL; | |
| 343 fSaveCount = canvas->getSaveCount(); | |
| 344 fDoClearImageFilter = false; | |
| 345 fDone = false; | |
| 346 | |
| 347 if (!skipLayerForImageFilter && fOrigPaint.getImageFilter()) { | |
| 348 SkPaint tmp; | |
| 349 tmp.setImageFilter(fOrigPaint.getImageFilter()); | |
| 350 (void)canvas->internalSaveLayer(bounds, &tmp, SkCanvas::kARGB_ClipLayer_SaveFlag, | |
| 351 true, SkCanvas::kFullLayer_SaveLayerStrategy); | |
| 352 // we'll clear the imageFilter for the actual draws in next(), so | |
| 353 // it will only be applied during the restore(). | |
| 354 fDoClearImageFilter = true; | |
| 355 } | |
| 356 | |
| 357 if (SkDrawLooper* looper = paint.getLooper()) { | |
| 358 void* buffer = fLooperContextAllocator.reserveT<SkDrawLooper::Context>( | |
| 359 looper->contextSize()); | |
| 360 fLooperContext = looper->createContext(canvas, buffer); | |
| 361 fIsSimple = false; | |
| 362 } else { | |
| 363 fLooperContext = NULL; | |
| 364 // can we be marked as simple? | |
| 365 fIsSimple = !fFilter && !fDoClearImageFilter; | |
| 366 } | |
| 367 } | |
| 368 | |
| 369 ~AutoDrawLooper() { | |
| 370 if (fDoClearImageFilter) { | |
| 371 fCanvas->internalRestore(); | |
| 372 } | |
| 373 SkASSERT(fCanvas->getSaveCount() == fSaveCount); | |
| 374 } | |
| 375 | |
| 376 const SkPaint& paint() const { | |
| 377 SkASSERT(fPaint); | |
| 378 return *fPaint; | |
| 379 } | |
| 380 | |
| 381 bool next(SkDrawFilter::Type drawType) { | |
| 382 if (fDone) { | |
| 383 return false; | |
| 384 } else if (fIsSimple) { | |
| 385 fDone = true; | |
| 386 fPaint = &fOrigPaint; | |
| 387 return !fPaint->nothingToDraw(); | |
| 388 } else { | |
| 389 return this->doNext(drawType); | |
| 390 } | |
| 391 } | |
| 392 | |
| 393 private: | |
| 394 SkLazyPaint fLazyPaint; | |
| 395 SkCanvas* fCanvas; | |
| 396 const SkPaint& fOrigPaint; | |
| 397 SkDrawFilter* fFilter; | |
| 398 const SkPaint* fPaint; | |
| 399 int fSaveCount; | |
| 400 bool fDoClearImageFilter; | |
| 401 bool fDone; | |
| 402 bool fIsSimple; | |
| 403 SkDrawLooper::Context* fLooperContext; | |
| 404 SkSmallAllocator<1, 32> fLooperContextAllocator; | |
| 405 | |
| 406 bool doNext(SkDrawFilter::Type drawType); | |
| 407 }; | |
| 408 | |
| 409 bool AutoDrawLooper::doNext(SkDrawFilter::Type drawType) { | |
| 410 fPaint = NULL; | |
| 411 SkASSERT(!fIsSimple); | |
| 412 SkASSERT(fLooperContext || fFilter || fDoClearImageFilter); | |
| 413 | |
| 414 SkPaint* paint = fLazyPaint.set(fOrigPaint); | |
| 415 | |
| 416 if (fDoClearImageFilter) { | |
| 417 paint->setImageFilter(NULL); | |
| 418 } | |
| 419 | |
| 420 if (fLooperContext && !fLooperContext->next(fCanvas, paint)) { | |
| 421 fDone = true; | |
| 422 return false; | |
| 423 } | |
| 424 if (fFilter) { | |
| 425 if (!fFilter->filter(paint, drawType)) { | |
| 426 fDone = true; | |
| 427 return false; | |
| 428 } | |
| 429 if (NULL == fLooperContext) { | |
| 430 // no looper means we only draw once | |
| 431 fDone = true; | |
| 432 } | |
| 433 } | |
| 434 fPaint = paint; | |
| 435 | |
| 436 // if we only came in here for the imagefilter, mark us as done | |
| 437 if (!fLooperContext && !fFilter) { | |
| 438 fDone = true; | |
| 439 } | |
| 440 | |
| 441 // call this after any possible paint modifiers | |
| 442 if (fPaint->nothingToDraw()) { | |
| 443 fPaint = NULL; | |
| 444 return false; | |
| 445 } | |
| 446 return true; | |
| 447 } | |
| 448 | |
| 449 /* Stack helper for managing a SkBounder. In the destructor, if we were | |
| 450 given a bounder, we call its commit() method, signifying that we are | |
| 451 done accumulating bounds for that draw. | |
| 452 */ | |
| 453 class SkAutoBounderCommit { | |
| 454 public: | |
| 455 SkAutoBounderCommit(SkBounder* bounder) : fBounder(bounder) {} | |
| 456 ~SkAutoBounderCommit() { | |
| 457 if (NULL != fBounder) { | |
| 458 fBounder->commit(); | |
| 459 } | |
| 460 } | |
| 461 private: | |
| 462 SkBounder* fBounder; | |
| 463 }; | |
| 464 #define SkAutoBounderCommit(...) SK_REQUIRE_LOCAL_VAR(SkAutoBounderCommit) | |
| 465 | |
| 466 #include "SkColorPriv.h" | |
| 467 | |
| 468 ////////// macros to place around the internal draw calls ////////////////// | |
| 469 | |
| 470 #define LOOPER_BEGIN_DRAWDEVICE(paint, type) \ | |
| 471 this->predrawNotify(); \ | |
| 472 AutoDrawLooper looper(this, paint, true); \ | |
| 473 while (looper.next(type)) { \ | |
| 474 SkAutoBounderCommit ac(fBounder); \ | |
| 475 SkDrawIter iter(this); | |
| 476 | |
| 477 #define LOOPER_BEGIN(paint, type, bounds) \ | |
| 478 this->predrawNotify(); \ | |
| 479 AutoDrawLooper looper(this, paint, false, bounds); \ | |
| 480 while (looper.next(type)) { \ | |
| 481 SkAutoBounderCommit ac(fBounder); \ | |
| 482 SkDrawIter iter(this); | |
| 483 | |
| 484 #define LOOPER_END } | |
| 485 | |
| 486 //////////////////////////////////////////////////////////////////////////// | |
| 487 | |
| 488 SkBaseDevice* SkCanvas::init(SkBaseDevice* device) { | |
| 489 fBounder = NULL; | |
| 490 fCachedLocalClipBounds.setEmpty(); | |
| 491 fCachedLocalClipBoundsDirty = true; | |
| 492 fAllowSoftClip = true; | |
| 493 fAllowSimplifyClip = false; | |
| 494 fDeviceCMDirty = false; | |
| 495 fSaveLayerCount = 0; | |
| 496 fCullCount = 0; | |
| 497 fMetaData = NULL; | |
| 498 | |
| 499 fMCRec = (MCRec*)fMCStack.push_back(); | |
| 500 new (fMCRec) MCRec(NULL, 0); | |
| 501 | |
| 502 fMCRec->fLayer = SkNEW_ARGS(DeviceCM, (NULL, 0, 0, NULL, NULL)); | |
| 503 fMCRec->fTopLayer = fMCRec->fLayer; | |
| 504 | |
| 505 fSurfaceBase = NULL; | |
| 506 | |
| 507 return this->setRootDevice(device); | |
| 508 } | |
| 509 | |
| 510 SkCanvas::SkCanvas() | |
| 511 : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) | |
| 512 { | |
| 513 inc_canvas(); | |
| 514 | |
| 515 this->init(NULL); | |
| 516 } | |
| 517 | |
| 518 SkCanvas::SkCanvas(int width, int height) | |
| 519 : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) | |
| 520 { | |
| 521 inc_canvas(); | |
| 522 | |
| 523 SkBitmap bitmap; | |
| 524 bitmap.setConfig(SkImageInfo::MakeUnknown(width, height)); | |
| 525 this->init(SkNEW_ARGS(SkBitmapDevice, (bitmap)))->unref(); | |
| 526 } | |
| 527 | |
| 528 SkCanvas::SkCanvas(SkBaseDevice* device) | |
| 529 : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) | |
| 530 { | |
| 531 inc_canvas(); | |
| 532 | |
| 533 this->init(device); | |
| 534 } | |
| 535 | |
| 536 SkCanvas::SkCanvas(const SkBitmap& bitmap) | |
| 537 : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) | |
| 538 { | |
| 539 inc_canvas(); | |
| 540 | |
| 541 this->init(SkNEW_ARGS(SkBitmapDevice, (bitmap)))->unref(); | |
| 542 } | |
| 543 | |
| 544 SkCanvas::~SkCanvas() { | |
| 545 // free up the contents of our deque | |
| 546 this->restoreToCount(1); // restore everything but the last | |
| 547 SkASSERT(0 == fSaveLayerCount); | |
| 548 | |
| 549 this->internalRestore(); // restore the last, since we're going away | |
| 550 | |
| 551 SkSafeUnref(fBounder); | |
| 552 SkDELETE(fMetaData); | |
| 553 | |
| 554 dec_canvas(); | |
| 555 } | |
| 556 | |
| 557 SkBounder* SkCanvas::setBounder(SkBounder* bounder) { | |
| 558 SkRefCnt_SafeAssign(fBounder, bounder); | |
| 559 return bounder; | |
| 560 } | |
| 561 | |
| 562 SkDrawFilter* SkCanvas::getDrawFilter() const { | |
| 563 return fMCRec->fFilter; | |
| 564 } | |
| 565 | |
| 566 SkDrawFilter* SkCanvas::setDrawFilter(SkDrawFilter* filter) { | |
| 567 SkRefCnt_SafeAssign(fMCRec->fFilter, filter); | |
| 568 return filter; | |
| 569 } | |
| 570 | |
| 571 SkMetaData& SkCanvas::getMetaData() { | |
| 572 // metadata users are rare, so we lazily allocate it. If that changes we | |
| 573 // can decide to just make it a field in the device (rather than a ptr) | |
| 574 if (NULL == fMetaData) { | |
| 575 fMetaData = new SkMetaData; | |
| 576 } | |
| 577 return *fMetaData; | |
| 578 } | |
| 579 | |
| 580 /////////////////////////////////////////////////////////////////////////////// | |
| 581 | |
| 582 void SkCanvas::flush() { | |
| 583 SkBaseDevice* device = this->getDevice(); | |
| 584 if (device) { | |
| 585 device->flush(); | |
| 586 } | |
| 587 } | |
| 588 | |
| 589 SkISize SkCanvas::getTopLayerSize() const { | |
| 590 SkBaseDevice* d = this->getTopDevice(); | |
| 591 return d ? SkISize::Make(d->width(), d->height()) : SkISize::Make(0, 0); | |
| 592 } | |
| 593 | |
| 594 SkIPoint SkCanvas::getTopLayerOrigin() const { | |
| 595 SkBaseDevice* d = this->getTopDevice(); | |
| 596 return d ? d->getOrigin() : SkIPoint::Make(0, 0); | |
| 597 } | |
| 598 | |
| 599 SkISize SkCanvas::getBaseLayerSize() const { | |
| 600 SkBaseDevice* d = this->getDevice(); | |
| 601 return d ? SkISize::Make(d->width(), d->height()) : SkISize::Make(0, 0); | |
| 602 } | |
| 603 | |
| 604 SkBaseDevice* SkCanvas::getDevice() const { | |
| 605 // return root device | |
| 606 MCRec* rec = (MCRec*) fMCStack.front(); | |
| 607 SkASSERT(rec && rec->fLayer); | |
| 608 return rec->fLayer->fDevice; | |
| 609 } | |
| 610 | |
| 611 SkBaseDevice* SkCanvas::getTopDevice(bool updateMatrixClip) const { | |
| 612 if (updateMatrixClip) { | |
| 613 const_cast<SkCanvas*>(this)->updateDeviceCMCache(); | |
| 614 } | |
| 615 return fMCRec->fTopLayer->fDevice; | |
| 616 } | |
| 617 | |
| 618 SkBaseDevice* SkCanvas::setRootDevice(SkBaseDevice* device) { | |
| 619 // return root device | |
| 620 SkDeque::F2BIter iter(fMCStack); | |
| 621 MCRec* rec = (MCRec*)iter.next(); | |
| 622 SkASSERT(rec && rec->fLayer); | |
| 623 SkBaseDevice* rootDevice = rec->fLayer->fDevice; | |
| 624 | |
| 625 if (rootDevice == device) { | |
| 626 return device; | |
| 627 } | |
| 628 | |
| 629 if (device) { | |
| 630 device->onAttachToCanvas(this); | |
| 631 } | |
| 632 if (rootDevice) { | |
| 633 rootDevice->onDetachFromCanvas(); | |
| 634 } | |
| 635 | |
| 636 SkRefCnt_SafeAssign(rec->fLayer->fDevice, device); | |
| 637 rootDevice = device; | |
| 638 | |
| 639 fDeviceCMDirty = true; | |
| 640 | |
| 641 /* Now we update our initial region to have the bounds of the new device, | |
| 642 and then intersect all of the clips in our stack with these bounds, | |
| 643 to ensure that we can't draw outside of the device's bounds (and trash | |
| 644 memory). | |
| 645 | |
| 646 NOTE: this is only a partial-fix, since if the new device is larger than | |
| 647 the previous one, we don't know how to "enlarge" the clips in our stack, | |
| 648 so drawing may be artificially restricted. Without keeping a history of | |
| 649 all calls to canvas->clipRect() and canvas->clipPath(), we can't exactly | |
| 650 reconstruct the correct clips, so this approximation will have to do. | |
| 651 The caller really needs to restore() back to the base if they want to | |
| 652 accurately take advantage of the new device bounds. | |
| 653 */ | |
| 654 | |
| 655 SkIRect bounds; | |
| 656 if (device) { | |
| 657 bounds.set(0, 0, device->width(), device->height()); | |
| 658 } else { | |
| 659 bounds.setEmpty(); | |
| 660 } | |
| 661 // now jam our 1st clip to be bounds, and intersect the rest with that | |
| 662 rec->fRasterClip->setRect(bounds); | |
| 663 while ((rec = (MCRec*)iter.next()) != NULL) { | |
| 664 (void)rec->fRasterClip->op(bounds, SkRegion::kIntersect_Op); | |
| 665 } | |
| 666 | |
| 667 return device; | |
| 668 } | |
| 669 | |
| 670 bool SkCanvas::readPixels(SkBitmap* bitmap, | |
| 671 int x, int y, | |
| 672 Config8888 config8888) { | |
| 673 SkBaseDevice* device = this->getDevice(); | |
| 674 if (!device) { | |
| 675 return false; | |
| 676 } | |
| 677 return device->readPixels(bitmap, x, y, config8888); | |
| 678 } | |
| 679 | |
| 680 bool SkCanvas::readPixels(const SkIRect& srcRect, SkBitmap* bitmap) { | |
| 681 SkBaseDevice* device = this->getDevice(); | |
| 682 if (!device) { | |
| 683 return false; | |
| 684 } | |
| 685 | |
| 686 SkIRect bounds; | |
| 687 bounds.set(0, 0, device->width(), device->height()); | |
| 688 if (!bounds.intersect(srcRect)) { | |
| 689 return false; | |
| 690 } | |
| 691 | |
| 692 SkBitmap tmp; | |
| 693 tmp.setConfig(SkBitmap::kARGB_8888_Config, bounds.width(), | |
| 694 bounds.height()); | |
| 695 if (this->readPixels(&tmp, bounds.fLeft, bounds.fTop)) { | |
| 696 bitmap->swap(tmp); | |
| 697 return true; | |
| 698 } else { | |
| 699 return false; | |
| 700 } | |
| 701 } | |
| 702 | |
| 703 #ifdef SK_SUPPORT_LEGACY_WRITEPIXELSCONFIG | |
| 704 void SkCanvas::writePixels(const SkBitmap& bitmap, int x, int y, | |
| 705 Config8888 config8888) { | |
| 706 SkBaseDevice* device = this->getDevice(); | |
| 707 if (device) { | |
| 708 if (SkIRect::Intersects(SkIRect::MakeSize(this->getDeviceSize()), | |
| 709 SkIRect::MakeXYWH(x, y, bitmap.width(), bitmap.height()))) { | |
| 710 device->accessBitmap(true); | |
| 711 device->writePixels(bitmap, x, y, config8888); | |
| 712 } | |
| 713 } | |
| 714 } | |
| 715 #endif | |
| 716 | |
| 717 bool SkCanvas::writePixels(const SkBitmap& bitmap, int x, int y) { | |
| 718 if (bitmap.getTexture()) { | |
| 719 return false; | |
| 720 } | |
| 721 SkBitmap bm(bitmap); | |
| 722 bm.lockPixels(); | |
| 723 if (bm.getPixels()) { | |
| 724 return this->writePixels(bm.info(), bm.getPixels(), bm.rowBytes(), x, y); | |
| 725 } | |
| 726 return false; | |
| 727 } | |
| 728 | |
| 729 bool SkCanvas::writePixels(const SkImageInfo& origInfo, const void* pixels, size_t rowBytes, | |
| 730 int x, int y) { | |
| 731 switch (origInfo.colorType()) { | |
| 732 case kUnknown_SkColorType: | |
| 733 case kIndex_8_SkColorType: | |
| 734 return false; | |
| 735 default: | |
| 736 break; | |
| 737 } | |
| 738 if (NULL == pixels || rowBytes < origInfo.minRowBytes()) { | |
| 739 return false; | |
| 740 } | |
| 741 | |
| 742 const SkISize size = this->getBaseLayerSize(); | |
| 743 SkIRect target = SkIRect::MakeXYWH(x, y, origInfo.width(), origInfo.height()); | |
| 744 if (!target.intersect(0, 0, size.width(), size.height())) { | |
| 745 return false; | |
| 746 } | |
| 747 | |
| 748 SkBaseDevice* device = this->getDevice(); | |
| 749 if (!device) { | |
| 750 return false; | |
| 751 } | |
| 752 | |
| 753 SkImageInfo info = origInfo; | |
| 754 // the intersect may have shrunk info's logical size | |
| 755 info.fWidth = target.width(); | |
| 756 info.fHeight = target.height(); | |
| 757 | |
| 758 // if x or y are negative, then we have to adjust pixels | |
| 759 if (x > 0) { | |
| 760 x = 0; | |
| 761 } | |
| 762 if (y > 0) { | |
| 763 y = 0; | |
| 764 } | |
| 765 // here x,y are either 0 or negative | |
| 766 pixels = ((const char*)pixels - y * rowBytes - x * info.bytesPerPixel()); | |
| 767 | |
| 768 // The device can assert that the requested area is always contained in its bounds | |
| 769 return device->writePixelsDirect(info, pixels, rowBytes, target.x(), target.y()); | |
| 770 } | |
| 771 | |
| 772 SkCanvas* SkCanvas::canvasForDrawIter() { | |
| 773 return this; | |
| 774 } | |
| 775 | |
| 776 ////////////////////////////////////////////////////////////////////////////// | |
| 777 | |
| 778 void SkCanvas::updateDeviceCMCache() { | |
| 779 if (fDeviceCMDirty) { | |
| 780 const SkMatrix& totalMatrix = this->getTotalMatrix(); | |
| 781 const SkRasterClip& totalClip = *fMCRec->fRasterClip; | |
| 782 DeviceCM* layer = fMCRec->fTopLayer; | |
| 783 | |
| 784 if (NULL == layer->fNext) { // only one layer | |
| 785 layer->updateMC(totalMatrix, totalClip, fClipStack, NULL); | |
| 786 } else { | |
| 787 SkRasterClip clip(totalClip); | |
| 788 do { | |
| 789 layer->updateMC(totalMatrix, clip, fClipStack, &clip); | |
| 790 } while ((layer = layer->fNext) != NULL); | |
| 791 } | |
| 792 fDeviceCMDirty = false; | |
| 793 } | |
| 794 } | |
| 795 | |
| 796 /////////////////////////////////////////////////////////////////////////////// | |
| 797 | |
| 798 int SkCanvas::internalSave(SaveFlags flags) { | |
| 799 int saveCount = this->getSaveCount(); // record this before the actual save | |
| 800 | |
| 801 MCRec* newTop = (MCRec*)fMCStack.push_back(); | |
| 802 new (newTop) MCRec(fMCRec, flags); // balanced in restore() | |
| 803 | |
| 804 fMCRec = newTop; | |
| 805 | |
| 806 if (SkCanvas::kClip_SaveFlag & flags) { | |
| 807 fClipStack.save(); | |
| 808 } | |
| 809 | |
| 810 return saveCount; | |
| 811 } | |
| 812 | |
| 813 void SkCanvas::willSave(SaveFlags) { | |
| 814 // Do nothing. Subclasses may do something. | |
| 815 } | |
| 816 | |
| 817 int SkCanvas::save(SaveFlags flags) { | |
| 818 this->willSave(flags); | |
| 819 // call shared impl | |
| 820 return this->internalSave(flags); | |
| 821 } | |
| 822 | |
| 823 static bool bounds_affects_clip(SkCanvas::SaveFlags flags) { | |
| 824 #ifdef SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG | |
| 825 return (flags & SkCanvas::kClipToLayer_SaveFlag) != 0; | |
| 826 #else | |
| 827 return true; | |
| 828 #endif | |
| 829 } | |
| 830 | |
| 831 bool SkCanvas::clipRectBounds(const SkRect* bounds, SaveFlags flags, | |
| 832 SkIRect* intersection, const SkImageFilter* imageFilter) { | |
| 833 SkIRect clipBounds; | |
| 834 SkRegion::Op op = SkRegion::kIntersect_Op; | |
| 835 if (!this->getClipDeviceBounds(&clipBounds)) { | |
| 836 return false; | |
| 837 } | |
| 838 | |
| 839 if (imageFilter) { | |
| 840 imageFilter->filterBounds(clipBounds, *fMCRec->fMatrix, &clipBounds); | |
| 841 // Filters may grow the bounds beyond the device bounds. | |
| 842 op = SkRegion::kReplace_Op; | |
| 843 } | |
| 844 SkIRect ir; | |
| 845 if (NULL != bounds) { | |
| 846 SkRect r; | |
| 847 | |
| 848 this->getTotalMatrix().mapRect(&r, *bounds); | |
| 849 r.roundOut(&ir); | |
| 850 // early exit if the layer's bounds are clipped out | |
| 851 if (!ir.intersect(clipBounds)) { | |
| 852 if (bounds_affects_clip(flags)) { | |
| 853 fMCRec->fRasterClip->setEmpty(); | |
| 854 } | |
| 855 return false; | |
| 856 } | |
| 857 } else { // no user bounds, so just use the clip | |
| 858 ir = clipBounds; | |
| 859 } | |
| 860 | |
| 861 if (bounds_affects_clip(flags)) { | |
| 862 fClipStack.clipDevRect(ir, op); | |
| 863 // early exit if the clip is now empty | |
| 864 if (!fMCRec->fRasterClip->op(ir, op)) { | |
| 865 return false; | |
| 866 } | |
| 867 } | |
| 868 | |
| 869 if (intersection) { | |
| 870 *intersection = ir; | |
| 871 } | |
| 872 return true; | |
| 873 } | |
| 874 | |
| 875 SkCanvas::SaveLayerStrategy SkCanvas::willSaveLayer(const SkRect*, const SkPaint*, SaveFlags) { | |
| 876 | |
| 877 // Do nothing. Subclasses may do something. | |
| 878 return kFullLayer_SaveLayerStrategy; | |
| 879 } | |
| 880 | |
| 881 int SkCanvas::saveLayer(const SkRect* bounds, const SkPaint* paint, | |
| 882 SaveFlags flags) { | |
| 883 // Overriding classes may return false to signal that we don't need to create a layer. | |
| 884 SaveLayerStrategy strategy = this->willSaveLayer(bounds, paint, flags); | |
| 885 return this->internalSaveLayer(bounds, paint, flags, false, strategy); | |
| 886 } | |
| 887 | |
| 888 static SkBaseDevice* createCompatibleDevice(SkCanvas* canvas, | |
| 889 const SkImageInfo& info) { | |
| 890 SkBaseDevice* device = canvas->getDevice(); | |
| 891 return device ? device->createCompatibleDevice(info) : NULL; | |
| 892 } | |
| 893 | |
| 894 int SkCanvas::internalSaveLayer(const SkRect* bounds, const SkPaint* paint, SaveFlags flags, | |
| 895 bool justForImageFilter, SaveLayerStrategy strategy) { | |
| 896 #ifndef SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG | |
| 897 flags = (SaveFlags)(flags | kClipToLayer_SaveFlag); | |
| 898 #endif | |
| 899 | |
| 900 // do this before we create the layer. We don't call the public save() since | |
| 901 // that would invoke a possibly overridden virtual | |
| 902 int count = this->internalSave(flags); | |
| 903 | |
| 904 fDeviceCMDirty = true; | |
| 905 | |
| 906 SkIRect ir; | |
| 907 if (!this->clipRectBounds(bounds, flags, &ir, paint ? paint->getImageFilter() : NULL)) { | |
| 908 return count; | |
| 909 } | |
| 910 | |
| 911 // FIXME: do willSaveLayer() overriders returning kNoLayer_SaveLayerStrategy really care about | |
| 912 // the clipRectBounds() call above? | |
| 913 if (kNoLayer_SaveLayerStrategy == strategy) { | |
| 914 return count; | |
| 915 } | |
| 916 | |
| 917 // Kill the imagefilter if our device doesn't allow it | |
| 918 SkLazyPaint lazyP; | |
| 919 if (paint && paint->getImageFilter()) { | |
| 920 if (!this->getTopDevice()->allowImageFilter(paint->getImageFilter())) { | |
| 921 if (justForImageFilter) { | |
| 922 // early exit if the layer was just for the imageFilter | |
| 923 return count; | |
| 924 } | |
| 925 SkPaint* p = lazyP.set(*paint); | |
| 926 p->setImageFilter(NULL); | |
| 927 paint = p; | |
| 928 } | |
| 929 } | |
| 930 | |
| 931 bool isOpaque = !SkToBool(flags & kHasAlphaLayer_SaveFlag); | |
| 932 SkImageInfo info = SkImageInfo::MakeN32(ir.width(), ir.height(), | |
| 933 isOpaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType); | |
| 934 | |
| 935 SkBaseDevice* device; | |
| 936 if (paint && paint->getImageFilter()) { | |
| 937 device = createCompatibleDevice(this, info); | |
| 938 } else { | |
| 939 device = this->createLayerDevice(info); | |
| 940 } | |
| 941 if (NULL == device) { | |
| 942 SkDebugf("Unable to create device for layer."); | |
| 943 return count; | |
| 944 } | |
| 945 | |
| 946 device->setOrigin(ir.fLeft, ir.fTop); | |
| 947 DeviceCM* layer = SkNEW_ARGS(DeviceCM, (device, ir.fLeft, ir.fTop, paint, this)); | |
| 948 device->unref(); | |
| 949 | |
| 950 layer->fNext = fMCRec->fTopLayer; | |
| 951 fMCRec->fLayer = layer; | |
| 952 fMCRec->fTopLayer = layer; // this field is NOT an owner of layer | |
| 953 | |
| 954 fSaveLayerCount += 1; | |
| 955 return count; | |
| 956 } | |
| 957 | |
| 958 int SkCanvas::saveLayerAlpha(const SkRect* bounds, U8CPU alpha, | |
| 959 SaveFlags flags) { | |
| 960 if (0xFF == alpha) { | |
| 961 return this->saveLayer(bounds, NULL, flags); | |
| 962 } else { | |
| 963 SkPaint tmpPaint; | |
| 964 tmpPaint.setAlpha(alpha); | |
| 965 return this->saveLayer(bounds, &tmpPaint, flags); | |
| 966 } | |
| 967 } | |
| 968 | |
| 969 void SkCanvas::willRestore() { | |
| 970 // Do nothing. Subclasses may do something. | |
| 971 } | |
| 972 | |
| 973 void SkCanvas::restore() { | |
| 974 // check for underflow | |
| 975 if (fMCStack.count() > 1) { | |
| 976 this->willRestore(); | |
| 977 this->internalRestore(); | |
| 978 } | |
| 979 } | |
| 980 | |
| 981 void SkCanvas::internalRestore() { | |
| 982 SkASSERT(fMCStack.count() != 0); | |
| 983 | |
| 984 fDeviceCMDirty = true; | |
| 985 fCachedLocalClipBoundsDirty = true; | |
| 986 | |
| 987 if (SkCanvas::kClip_SaveFlag & fMCRec->fFlags) { | |
| 988 fClipStack.restore(); | |
| 989 } | |
| 990 | |
| 991 // reserve our layer (if any) | |
| 992 DeviceCM* layer = fMCRec->fLayer; // may be null | |
| 993 // now detach it from fMCRec so we can pop(). Gets freed after its drawn | |
| 994 fMCRec->fLayer = NULL; | |
| 995 | |
| 996 // now do the normal restore() | |
| 997 fMCRec->~MCRec(); // balanced in save() | |
| 998 fMCStack.pop_back(); | |
| 999 fMCRec = (MCRec*)fMCStack.back(); | |
| 1000 | |
| 1001 /* Time to draw the layer's offscreen. We can't call the public drawSprite, | |
| 1002 since if we're being recorded, we don't want to record this (the | |
| 1003 recorder will have already recorded the restore). | |
| 1004 */ | |
| 1005 if (NULL != layer) { | |
| 1006 if (layer->fNext) { | |
| 1007 const SkIPoint& origin = layer->fDevice->getOrigin(); | |
| 1008 this->internalDrawDevice(layer->fDevice, origin.x(), origin.y(), | |
| 1009 layer->fPaint); | |
| 1010 // reset this, since internalDrawDevice will have set it to true | |
| 1011 fDeviceCMDirty = true; | |
| 1012 | |
| 1013 SkASSERT(fSaveLayerCount > 0); | |
| 1014 fSaveLayerCount -= 1; | |
| 1015 } | |
| 1016 SkDELETE(layer); | |
| 1017 } | |
| 1018 } | |
| 1019 | |
| 1020 int SkCanvas::getSaveCount() const { | |
| 1021 return fMCStack.count(); | |
| 1022 } | |
| 1023 | |
| 1024 void SkCanvas::restoreToCount(int count) { | |
| 1025 // sanity check | |
| 1026 if (count < 1) { | |
| 1027 count = 1; | |
| 1028 } | |
| 1029 | |
| 1030 int n = this->getSaveCount() - count; | |
| 1031 for (int i = 0; i < n; ++i) { | |
| 1032 this->restore(); | |
| 1033 } | |
| 1034 } | |
| 1035 | |
| 1036 bool SkCanvas::isDrawingToLayer() const { | |
| 1037 return fSaveLayerCount > 0; | |
| 1038 } | |
| 1039 | |
| 1040 SkSurface* SkCanvas::newSurface(const SkImageInfo& info) { | |
| 1041 return this->onNewSurface(info); | |
| 1042 } | |
| 1043 | |
| 1044 SkSurface* SkCanvas::onNewSurface(const SkImageInfo& info) { | |
| 1045 SkBaseDevice* dev = this->getDevice(); | |
| 1046 return dev ? dev->newSurface(info) : NULL; | |
| 1047 } | |
| 1048 | |
| 1049 SkImageInfo SkCanvas::imageInfo() const { | |
| 1050 SkBaseDevice* dev = this->getDevice(); | |
| 1051 if (dev) { | |
| 1052 return dev->imageInfo(); | |
| 1053 } else { | |
| 1054 return SkImageInfo::MakeUnknown(0, 0); | |
| 1055 } | |
| 1056 } | |
| 1057 | |
| 1058 const void* SkCanvas::peekPixels(SkImageInfo* info, size_t* rowBytes) { | |
| 1059 return this->onPeekPixels(info, rowBytes); | |
| 1060 } | |
| 1061 | |
| 1062 const void* SkCanvas::onPeekPixels(SkImageInfo* info, size_t* rowBytes) { | |
| 1063 SkBaseDevice* dev = this->getDevice(); | |
| 1064 return dev ? dev->peekPixels(info, rowBytes) : NULL; | |
| 1065 } | |
| 1066 | |
| 1067 void* SkCanvas::accessTopLayerPixels(SkImageInfo* info, size_t* rowBytes) { | |
| 1068 return this->onAccessTopLayerPixels(info, rowBytes); | |
| 1069 } | |
| 1070 | |
| 1071 void* SkCanvas::onAccessTopLayerPixels(SkImageInfo* info, size_t* rowBytes) { | |
| 1072 SkBaseDevice* dev = this->getTopDevice(); | |
| 1073 return dev ? dev->accessPixels(info, rowBytes) : NULL; | |
| 1074 } | |
| 1075 | |
| 1076 SkAutoROCanvasPixels::SkAutoROCanvasPixels(SkCanvas* canvas) { | |
| 1077 fAddr = canvas->peekPixels(&fInfo, &fRowBytes); | |
| 1078 if (NULL == fAddr) { | |
| 1079 fInfo = canvas->imageInfo(); | |
| 1080 if (kUnknown_SkColorType == fInfo.colorType() || | |
| 1081 !fBitmap.allocPixels(fInfo)) | |
| 1082 { | |
| 1083 return; // failure, fAddr is NULL | |
| 1084 } | |
| 1085 fBitmap.lockPixels(); | |
| 1086 if (!canvas->readPixels(&fBitmap, 0, 0)) { | |
| 1087 return; // failure, fAddr is NULL | |
| 1088 } | |
| 1089 fAddr = fBitmap.getPixels(); | |
| 1090 fRowBytes = fBitmap.rowBytes(); | |
| 1091 } | |
| 1092 SkASSERT(fAddr); // success | |
| 1093 } | |
| 1094 | |
| 1095 bool SkAutoROCanvasPixels::asROBitmap(SkBitmap* bitmap) const { | |
| 1096 if (fAddr) { | |
| 1097 return bitmap->installPixels(fInfo, const_cast<void*>(fAddr), fRowBytes, | |
| 1098 NULL, NULL); | |
| 1099 } else { | |
| 1100 bitmap->reset(); | |
| 1101 return false; | |
| 1102 } | |
| 1103 } | |
| 1104 | |
| 1105 void SkCanvas::onPushCull(const SkRect& cullRect) { | |
| 1106 // do nothing. Subclasses may do something | |
| 1107 } | |
| 1108 | |
| 1109 void SkCanvas::onPopCull() { | |
| 1110 // do nothing. Subclasses may do something | |
| 1111 } | |
| 1112 | |
| 1113 ///////////////////////////////////////////////////////////////////////////// | |
| 1114 | |
| 1115 void SkCanvas::internalDrawBitmap(const SkBitmap& bitmap, | |
| 1116 const SkMatrix& matrix, const SkPaint* paint) { | |
| 1117 if (bitmap.drawsNothing()) { | |
| 1118 return; | |
| 1119 } | |
| 1120 | |
| 1121 SkLazyPaint lazy; | |
| 1122 if (NULL == paint) { | |
| 1123 paint = lazy.init(); | |
| 1124 } | |
| 1125 | |
| 1126 SkDEBUGCODE(bitmap.validate();) | |
| 1127 CHECK_LOCKCOUNT_BALANCE(bitmap); | |
| 1128 | |
| 1129 SkRect storage; | |
| 1130 const SkRect* bounds = NULL; | |
| 1131 if (paint && paint->canComputeFastBounds()) { | |
| 1132 bitmap.getBounds(&storage); | |
| 1133 matrix.mapRect(&storage); | |
| 1134 bounds = &paint->computeFastBounds(storage, &storage); | |
| 1135 } | |
| 1136 | |
| 1137 LOOPER_BEGIN(*paint, SkDrawFilter::kBitmap_Type, bounds) | |
| 1138 | |
| 1139 while (iter.next()) { | |
| 1140 iter.fDevice->drawBitmap(iter, bitmap, matrix, looper.paint()); | |
| 1141 } | |
| 1142 | |
| 1143 LOOPER_END | |
| 1144 } | |
| 1145 | |
| 1146 void SkCanvas::internalDrawDevice(SkBaseDevice* srcDev, int x, int y, | |
| 1147 const SkPaint* paint) { | |
| 1148 SkPaint tmp; | |
| 1149 if (NULL == paint) { | |
| 1150 tmp.setDither(true); | |
| 1151 paint = &tmp; | |
| 1152 } | |
| 1153 | |
| 1154 LOOPER_BEGIN_DRAWDEVICE(*paint, SkDrawFilter::kBitmap_Type) | |
| 1155 while (iter.next()) { | |
| 1156 SkBaseDevice* dstDev = iter.fDevice; | |
| 1157 paint = &looper.paint(); | |
| 1158 SkImageFilter* filter = paint->getImageFilter(); | |
| 1159 SkIPoint pos = { x - iter.getX(), y - iter.getY() }; | |
| 1160 if (filter && !dstDev->canHandleImageFilter(filter)) { | |
| 1161 SkDeviceImageFilterProxy proxy(dstDev); | |
| 1162 SkBitmap dst; | |
| 1163 SkIPoint offset = SkIPoint::Make(0, 0); | |
| 1164 const SkBitmap& src = srcDev->accessBitmap(false); | |
| 1165 SkMatrix matrix = *iter.fMatrix; | |
| 1166 matrix.postTranslate(SkIntToScalar(-x), SkIntToScalar(-y)); | |
| 1167 SkIRect clipBounds = SkIRect::MakeWH(srcDev->width(), srcDev->height()); | |
| 1168 SkImageFilter::Context ctx(matrix, clipBounds); | |
| 1169 if (filter->filterImage(&proxy, src, ctx, &dst, &offset)) { | |
| 1170 SkPaint tmpUnfiltered(*paint); | |
| 1171 tmpUnfiltered.setImageFilter(NULL); | |
| 1172 dstDev->drawSprite(iter, dst, pos.x() + offset.x(), pos.y() + offset.y(), | |
| 1173 tmpUnfiltered); | |
| 1174 } | |
| 1175 } else { | |
| 1176 dstDev->drawDevice(iter, srcDev, pos.x(), pos.y(), *paint); | |
| 1177 } | |
| 1178 } | |
| 1179 LOOPER_END | |
| 1180 } | |
| 1181 | |
| 1182 void SkCanvas::drawSprite(const SkBitmap& bitmap, int x, int y, | |
| 1183 const SkPaint* paint) { | |
| 1184 if (bitmap.drawsNothing()) { | |
| 1185 return; | |
| 1186 } | |
| 1187 SkDEBUGCODE(bitmap.validate();) | |
| 1188 CHECK_LOCKCOUNT_BALANCE(bitmap); | |
| 1189 | |
| 1190 SkPaint tmp; | |
| 1191 if (NULL == paint) { | |
| 1192 paint = &tmp; | |
| 1193 } | |
| 1194 | |
| 1195 LOOPER_BEGIN_DRAWDEVICE(*paint, SkDrawFilter::kBitmap_Type) | |
| 1196 | |
| 1197 while (iter.next()) { | |
| 1198 paint = &looper.paint(); | |
| 1199 SkImageFilter* filter = paint->getImageFilter(); | |
| 1200 SkIPoint pos = { x - iter.getX(), y - iter.getY() }; | |
| 1201 if (filter && !iter.fDevice->canHandleImageFilter(filter)) { | |
| 1202 SkDeviceImageFilterProxy proxy(iter.fDevice); | |
| 1203 SkBitmap dst; | |
| 1204 SkIPoint offset = SkIPoint::Make(0, 0); | |
| 1205 SkMatrix matrix = *iter.fMatrix; | |
| 1206 matrix.postTranslate(SkIntToScalar(-x), SkIntToScalar(-y)); | |
| 1207 SkIRect clipBounds = SkIRect::MakeWH(bitmap.width(), bitmap.height()); | |
| 1208 SkImageFilter::Context ctx(matrix, clipBounds); | |
| 1209 if (filter->filterImage(&proxy, bitmap, ctx, &dst, &offset)) { | |
| 1210 SkPaint tmpUnfiltered(*paint); | |
| 1211 tmpUnfiltered.setImageFilter(NULL); | |
| 1212 iter.fDevice->drawSprite(iter, dst, pos.x() + offset.x(), pos.y() + offset.y(), | |
| 1213 tmpUnfiltered); | |
| 1214 } | |
| 1215 } else { | |
| 1216 iter.fDevice->drawSprite(iter, bitmap, pos.x(), pos.y(), *paint); | |
| 1217 } | |
| 1218 } | |
| 1219 LOOPER_END | |
| 1220 } | |
| 1221 | |
| 1222 ///////////////////////////////////////////////////////////////////////////// | |
| 1223 void SkCanvas::didTranslate(SkScalar, SkScalar) { | |
| 1224 // Do nothing. Subclasses may do something. | |
| 1225 } | |
| 1226 | |
| 1227 bool SkCanvas::translate(SkScalar dx, SkScalar dy) { | |
| 1228 fDeviceCMDirty = true; | |
| 1229 fCachedLocalClipBoundsDirty = true; | |
| 1230 bool res = fMCRec->fMatrix->preTranslate(dx, dy); | |
| 1231 | |
| 1232 this->didTranslate(dx, dy); | |
| 1233 return res; | |
| 1234 } | |
| 1235 | |
| 1236 void SkCanvas::didScale(SkScalar, SkScalar) { | |
| 1237 // Do nothing. Subclasses may do something. | |
| 1238 } | |
| 1239 | |
| 1240 bool SkCanvas::scale(SkScalar sx, SkScalar sy) { | |
| 1241 fDeviceCMDirty = true; | |
| 1242 fCachedLocalClipBoundsDirty = true; | |
| 1243 bool res = fMCRec->fMatrix->preScale(sx, sy); | |
| 1244 | |
| 1245 this->didScale(sx, sy); | |
| 1246 return res; | |
| 1247 } | |
| 1248 | |
| 1249 void SkCanvas::didRotate(SkScalar) { | |
| 1250 // Do nothing. Subclasses may do something. | |
| 1251 } | |
| 1252 | |
| 1253 bool SkCanvas::rotate(SkScalar degrees) { | |
| 1254 fDeviceCMDirty = true; | |
| 1255 fCachedLocalClipBoundsDirty = true; | |
| 1256 bool res = fMCRec->fMatrix->preRotate(degrees); | |
| 1257 | |
| 1258 this->didRotate(degrees); | |
| 1259 return res; | |
| 1260 } | |
| 1261 | |
| 1262 void SkCanvas::didSkew(SkScalar, SkScalar) { | |
| 1263 // Do nothing. Subclasses may do something. | |
| 1264 } | |
| 1265 | |
| 1266 bool SkCanvas::skew(SkScalar sx, SkScalar sy) { | |
| 1267 fDeviceCMDirty = true; | |
| 1268 fCachedLocalClipBoundsDirty = true; | |
| 1269 bool res = fMCRec->fMatrix->preSkew(sx, sy); | |
| 1270 | |
| 1271 this->didSkew(sx, sy); | |
| 1272 return res; | |
| 1273 } | |
| 1274 | |
| 1275 void SkCanvas::didConcat(const SkMatrix&) { | |
| 1276 // Do nothing. Subclasses may do something. | |
| 1277 } | |
| 1278 | |
| 1279 bool SkCanvas::concat(const SkMatrix& matrix) { | |
| 1280 fDeviceCMDirty = true; | |
| 1281 fCachedLocalClipBoundsDirty = true; | |
| 1282 bool res = fMCRec->fMatrix->preConcat(matrix); | |
| 1283 | |
| 1284 this->didConcat(matrix); | |
| 1285 return res; | |
| 1286 } | |
| 1287 | |
| 1288 void SkCanvas::didSetMatrix(const SkMatrix&) { | |
| 1289 // Do nothing. Subclasses may do something. | |
| 1290 } | |
| 1291 | |
| 1292 void SkCanvas::setMatrix(const SkMatrix& matrix) { | |
| 1293 fDeviceCMDirty = true; | |
| 1294 fCachedLocalClipBoundsDirty = true; | |
| 1295 *fMCRec->fMatrix = matrix; | |
| 1296 this->didSetMatrix(matrix); | |
| 1297 } | |
| 1298 | |
| 1299 void SkCanvas::resetMatrix() { | |
| 1300 SkMatrix matrix; | |
| 1301 | |
| 1302 matrix.reset(); | |
| 1303 this->setMatrix(matrix); | |
| 1304 } | |
| 1305 | |
| 1306 ////////////////////////////////////////////////////////////////////////////// | |
| 1307 | |
| 1308 void SkCanvas::clipRect(const SkRect& rect, SkRegion::Op op, bool doAA) { | |
| 1309 ClipEdgeStyle edgeStyle = doAA ? kSoft_ClipEdgeStyle : kHard_ClipEdgeStyle; | |
| 1310 this->onClipRect(rect, op, edgeStyle); | |
| 1311 } | |
| 1312 | |
| 1313 void SkCanvas::onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle edgeStyle) { | |
| 1314 #ifdef SK_ENABLE_CLIP_QUICKREJECT | |
| 1315 if (SkRegion::kIntersect_Op == op) { | |
| 1316 if (fMCRec->fRasterClip->isEmpty()) { | |
| 1317 return false; | |
| 1318 } | |
| 1319 | |
| 1320 if (this->quickReject(rect)) { | |
| 1321 fDeviceCMDirty = true; | |
| 1322 fCachedLocalClipBoundsDirty = true; | |
| 1323 | |
| 1324 fClipStack.clipEmpty(); | |
| 1325 return fMCRec->fRasterClip->setEmpty(); | |
| 1326 } | |
| 1327 } | |
| 1328 #endif | |
| 1329 | |
| 1330 AutoValidateClip avc(this); | |
| 1331 | |
| 1332 fDeviceCMDirty = true; | |
| 1333 fCachedLocalClipBoundsDirty = true; | |
| 1334 if (!fAllowSoftClip) { | |
| 1335 edgeStyle = kHard_ClipEdgeStyle; | |
| 1336 } | |
| 1337 | |
| 1338 if (fMCRec->fMatrix->rectStaysRect()) { | |
| 1339 // for these simpler matrices, we can stay a rect even after applying | |
| 1340 // the matrix. This means we don't have to a) make a path, and b) tell | |
| 1341 // the region code to scan-convert the path, only to discover that it | |
| 1342 // is really just a rect. | |
| 1343 SkRect r; | |
| 1344 | |
| 1345 fMCRec->fMatrix->mapRect(&r, rect); | |
| 1346 fClipStack.clipDevRect(r, op, kSoft_ClipEdgeStyle == edgeStyle); | |
| 1347 fMCRec->fRasterClip->op(r, op, kSoft_ClipEdgeStyle == edgeStyle); | |
| 1348 } else { | |
| 1349 // since we're rotated or some such thing, we convert the rect to a path | |
| 1350 // and clip against that, since it can handle any matrix. However, to | |
| 1351 // avoid recursion in the case where we are subclassed (e.g. Pictures) | |
| 1352 // we explicitly call "our" version of clipPath. | |
| 1353 SkPath path; | |
| 1354 | |
| 1355 path.addRect(rect); | |
| 1356 this->SkCanvas::onClipPath(path, op, edgeStyle); | |
| 1357 } | |
| 1358 } | |
| 1359 | |
| 1360 static void clip_path_helper(const SkCanvas* canvas, SkRasterClip* currClip, | |
| 1361 const SkPath& devPath, SkRegion::Op op, bool doAA) { | |
| 1362 // base is used to limit the size (and therefore memory allocation) of the | |
| 1363 // region that results from scan converting devPath. | |
| 1364 SkRegion base; | |
| 1365 | |
| 1366 if (SkRegion::kIntersect_Op == op) { | |
| 1367 // since we are intersect, we can do better (tighter) with currRgn's | |
| 1368 // bounds, than just using the device. However, if currRgn is complex, | |
| 1369 // our region blitter may hork, so we do that case in two steps. | |
| 1370 if (currClip->isRect()) { | |
| 1371 // FIXME: we should also be able to do this when currClip->isBW(), | |
| 1372 // but relaxing the test above triggers GM asserts in | |
| 1373 // SkRgnBuilder::blitH(). We need to investigate what's going on. | |
| 1374 currClip->setPath(devPath, currClip->bwRgn(), doAA); | |
| 1375 } else { | |
| 1376 base.setRect(currClip->getBounds()); | |
| 1377 SkRasterClip clip; | |
| 1378 clip.setPath(devPath, base, doAA); | |
| 1379 currClip->op(clip, op); | |
| 1380 } | |
| 1381 } else { | |
| 1382 const SkBaseDevice* device = canvas->getDevice(); | |
| 1383 if (!device) { | |
| 1384 currClip->setEmpty(); | |
| 1385 return; | |
| 1386 } | |
| 1387 | |
| 1388 base.setRect(0, 0, device->width(), device->height()); | |
| 1389 | |
| 1390 if (SkRegion::kReplace_Op == op) { | |
| 1391 currClip->setPath(devPath, base, doAA); | |
| 1392 } else { | |
| 1393 SkRasterClip clip; | |
| 1394 clip.setPath(devPath, base, doAA); | |
| 1395 currClip->op(clip, op); | |
| 1396 } | |
| 1397 } | |
| 1398 } | |
| 1399 | |
| 1400 void SkCanvas::clipRRect(const SkRRect& rrect, SkRegion::Op op, bool doAA) { | |
| 1401 ClipEdgeStyle edgeStyle = doAA ? kSoft_ClipEdgeStyle : kHard_ClipEdgeStyle; | |
| 1402 if (rrect.isRect()) { | |
| 1403 this->onClipRect(rrect.getBounds(), op, edgeStyle); | |
| 1404 } else { | |
| 1405 this->onClipRRect(rrect, op, edgeStyle); | |
| 1406 } | |
| 1407 } | |
| 1408 | |
| 1409 void SkCanvas::onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle edgeStyle) { | |
| 1410 SkRRect transformedRRect; | |
| 1411 if (rrect.transform(*fMCRec->fMatrix, &transformedRRect)) { | |
| 1412 AutoValidateClip avc(this); | |
| 1413 | |
| 1414 fDeviceCMDirty = true; | |
| 1415 fCachedLocalClipBoundsDirty = true; | |
| 1416 if (!fAllowSoftClip) { | |
| 1417 edgeStyle = kHard_ClipEdgeStyle; | |
| 1418 } | |
| 1419 | |
| 1420 fClipStack.clipDevRRect(transformedRRect, op, kSoft_ClipEdgeStyle == edgeStyle); | |
| 1421 | |
| 1422 SkPath devPath; | |
| 1423 devPath.addRRect(transformedRRect); | |
| 1424 | |
| 1425 clip_path_helper(this, fMCRec->fRasterClip, devPath, op, kSoft_ClipEdgeStyle == edgeStyle); | |
| 1426 return; | |
| 1427 } | |
| 1428 | |
| 1429 SkPath path; | |
| 1430 path.addRRect(rrect); | |
| 1431 // call the non-virtual version | |
| 1432 this->SkCanvas::onClipPath(path, op, edgeStyle); | |
| 1433 } | |
| 1434 | |
| 1435 void SkCanvas::clipPath(const SkPath& path, SkRegion::Op op, bool doAA) { | |
| 1436 ClipEdgeStyle edgeStyle = doAA ? kSoft_ClipEdgeStyle : kHard_ClipEdgeStyle; | |
| 1437 SkRect r; | |
| 1438 if (!path.isInverseFillType() && path.isRect(&r)) { | |
| 1439 this->onClipRect(r, op, edgeStyle); | |
| 1440 } else { | |
| 1441 this->onClipPath(path, op, edgeStyle); | |
| 1442 } | |
| 1443 } | |
| 1444 | |
| 1445 void SkCanvas::onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle edgeStyle) { | |
| 1446 #ifdef SK_ENABLE_CLIP_QUICKREJECT | |
| 1447 if (SkRegion::kIntersect_Op == op && !path.isInverseFillType()) { | |
| 1448 if (fMCRec->fRasterClip->isEmpty()) { | |
| 1449 return false; | |
| 1450 } | |
| 1451 | |
| 1452 if (this->quickReject(path.getBounds())) { | |
| 1453 fDeviceCMDirty = true; | |
| 1454 fCachedLocalClipBoundsDirty = true; | |
| 1455 | |
| 1456 fClipStack.clipEmpty(); | |
| 1457 return fMCRec->fRasterClip->setEmpty(); | |
| 1458 } | |
| 1459 } | |
| 1460 #endif | |
| 1461 | |
| 1462 AutoValidateClip avc(this); | |
| 1463 | |
| 1464 fDeviceCMDirty = true; | |
| 1465 fCachedLocalClipBoundsDirty = true; | |
| 1466 if (!fAllowSoftClip) { | |
| 1467 edgeStyle = kHard_ClipEdgeStyle; | |
| 1468 } | |
| 1469 | |
| 1470 SkPath devPath; | |
| 1471 path.transform(*fMCRec->fMatrix, &devPath); | |
| 1472 | |
| 1473 // Check if the transfomation, or the original path itself | |
| 1474 // made us empty. Note this can also happen if we contained NaN | |
| 1475 // values. computing the bounds detects this, and will set our | |
| 1476 // bounds to empty if that is the case. (see SkRect::set(pts, count)) | |
| 1477 if (devPath.getBounds().isEmpty()) { | |
| 1478 // resetting the path will remove any NaN or other wanky values | |
| 1479 // that might upset our scan converter. | |
| 1480 devPath.reset(); | |
| 1481 } | |
| 1482 | |
| 1483 // if we called path.swap() we could avoid a deep copy of this path | |
| 1484 fClipStack.clipDevPath(devPath, op, kSoft_ClipEdgeStyle == edgeStyle); | |
| 1485 | |
| 1486 if (fAllowSimplifyClip) { | |
| 1487 devPath.reset(); | |
| 1488 devPath.setFillType(SkPath::kInverseEvenOdd_FillType); | |
| 1489 const SkClipStack* clipStack = getClipStack(); | |
| 1490 SkClipStack::Iter iter(*clipStack, SkClipStack::Iter::kBottom_IterStart); | |
| 1491 const SkClipStack::Element* element; | |
| 1492 while ((element = iter.next())) { | |
| 1493 SkClipStack::Element::Type type = element->getType(); | |
| 1494 if (type == SkClipStack::Element::kEmpty_Type) { | |
| 1495 continue; | |
| 1496 } | |
| 1497 SkPath operand; | |
| 1498 element->asPath(&operand); | |
| 1499 SkRegion::Op elementOp = element->getOp(); | |
| 1500 if (elementOp == SkRegion::kReplace_Op) { | |
| 1501 devPath = operand; | |
| 1502 } else { | |
| 1503 Op(devPath, operand, (SkPathOp) elementOp, &devPath); | |
| 1504 } | |
| 1505 // if the prev and curr clips disagree about aa -vs- not, favor the aa request. | |
| 1506 // perhaps we need an API change to avoid this sort of mixed-signals about | |
| 1507 // clipping. | |
| 1508 if (element->isAA()) { | |
| 1509 edgeStyle = kSoft_ClipEdgeStyle; | |
| 1510 } | |
| 1511 } | |
| 1512 op = SkRegion::kReplace_Op; | |
| 1513 } | |
| 1514 | |
| 1515 clip_path_helper(this, fMCRec->fRasterClip, devPath, op, edgeStyle); | |
| 1516 } | |
| 1517 | |
| 1518 void SkCanvas::updateClipConservativelyUsingBounds(const SkRect& bounds, SkRegion::Op op, | |
| 1519 bool inverseFilled) { | |
| 1520 // This is for updating the clip conservatively using only bounds | |
| 1521 // information. | |
| 1522 // Contract: | |
| 1523 // The current clip must contain the true clip. The true | |
| 1524 // clip is the clip that would have normally been computed | |
| 1525 // by calls to clipPath and clipRRect | |
| 1526 // Objective: | |
| 1527 // Keep the current clip as small as possible without | |
| 1528 // breaking the contract, using only clip bounding rectangles | |
| 1529 // (for performance). | |
| 1530 | |
| 1531 // N.B.: This *never* calls back through a virtual on canvas, so subclasses | |
| 1532 // don't have to worry about getting caught in a loop. Thus anywhere | |
| 1533 // we call a virtual method, we explicitly prefix it with | |
| 1534 // SkCanvas:: to be sure to call the base-class. | |
| 1535 | |
| 1536 if (inverseFilled) { | |
| 1537 switch (op) { | |
| 1538 case SkRegion::kIntersect_Op: | |
| 1539 case SkRegion::kDifference_Op: | |
| 1540 // These ops can only shrink the current clip. So leaving | |
| 1541 // the clip unchanged conservatively respects the contract. | |
| 1542 break; | |
| 1543 case SkRegion::kUnion_Op: | |
| 1544 case SkRegion::kReplace_Op: | |
| 1545 case SkRegion::kReverseDifference_Op: | |
| 1546 case SkRegion::kXOR_Op: { | |
| 1547 // These ops can grow the current clip up to the extents of | |
| 1548 // the input clip, which is inverse filled, so we just set | |
| 1549 // the current clip to the device bounds. | |
| 1550 SkRect deviceBounds; | |
| 1551 SkIRect deviceIBounds; | |
| 1552 this->getDevice()->getGlobalBounds(&deviceIBounds); | |
| 1553 deviceBounds = SkRect::Make(deviceIBounds); | |
| 1554 this->SkCanvas::save(SkCanvas::kMatrix_SaveFlag); | |
| 1555 // set the clip in device space | |
| 1556 this->SkCanvas::setMatrix(SkMatrix::I()); | |
| 1557 this->SkCanvas::onClipRect(deviceBounds, SkRegion::kReplace_Op, | |
| 1558 kHard_ClipEdgeStyle); | |
| 1559 this->SkCanvas::restore(); //pop the matrix, but keep the clip | |
| 1560 break; | |
| 1561 } | |
| 1562 default: | |
| 1563 SkASSERT(0); // unhandled op? | |
| 1564 } | |
| 1565 } else { | |
| 1566 // Not inverse filled | |
| 1567 switch (op) { | |
| 1568 case SkRegion::kIntersect_Op: | |
| 1569 case SkRegion::kUnion_Op: | |
| 1570 case SkRegion::kReplace_Op: | |
| 1571 this->SkCanvas::onClipRect(bounds, op, kHard_ClipEdgeStyle); | |
| 1572 break; | |
| 1573 case SkRegion::kDifference_Op: | |
| 1574 // Difference can only shrink the current clip. | |
| 1575 // Leaving clip unchanged conservatively fullfills the contract. | |
| 1576 break; | |
| 1577 case SkRegion::kReverseDifference_Op: | |
| 1578 // To reverse, we swap in the bounds with a replace op. | |
| 1579 // As with difference, leave it unchanged. | |
| 1580 this->SkCanvas::onClipRect(bounds, SkRegion::kReplace_Op, kHard_ClipEdgeStyle); | |
| 1581 break; | |
| 1582 case SkRegion::kXOR_Op: | |
| 1583 // Be conservative, based on (A XOR B) always included in (A union B), | |
| 1584 // which is always included in (bounds(A) union bounds(B)) | |
| 1585 this->SkCanvas::onClipRect(bounds, SkRegion::kUnion_Op, kHard_ClipEdgeStyle); | |
| 1586 break; | |
| 1587 default: | |
| 1588 SkASSERT(0); // unhandled op? | |
| 1589 } | |
| 1590 } | |
| 1591 } | |
| 1592 | |
| 1593 void SkCanvas::clipRegion(const SkRegion& rgn, SkRegion::Op op) { | |
| 1594 this->onClipRegion(rgn, op); | |
| 1595 } | |
| 1596 | |
| 1597 void SkCanvas::onClipRegion(const SkRegion& rgn, SkRegion::Op op) { | |
| 1598 AutoValidateClip avc(this); | |
| 1599 | |
| 1600 fDeviceCMDirty = true; | |
| 1601 fCachedLocalClipBoundsDirty = true; | |
| 1602 | |
| 1603 // todo: signal fClipStack that we have a region, and therefore (I guess) | |
| 1604 // we have to ignore it, and use the region directly? | |
| 1605 fClipStack.clipDevRect(rgn.getBounds(), op); | |
| 1606 | |
| 1607 fMCRec->fRasterClip->op(rgn, op); | |
| 1608 } | |
| 1609 | |
| 1610 #ifdef SK_DEBUG | |
| 1611 void SkCanvas::validateClip() const { | |
| 1612 // construct clipRgn from the clipstack | |
| 1613 const SkBaseDevice* device = this->getDevice(); | |
| 1614 if (!device) { | |
| 1615 SkASSERT(this->isClipEmpty()); | |
| 1616 return; | |
| 1617 } | |
| 1618 | |
| 1619 SkIRect ir; | |
| 1620 ir.set(0, 0, device->width(), device->height()); | |
| 1621 SkRasterClip tmpClip(ir); | |
| 1622 | |
| 1623 SkClipStack::B2TIter iter(fClipStack); | |
| 1624 const SkClipStack::Element* element; | |
| 1625 while ((element = iter.next()) != NULL) { | |
| 1626 switch (element->getType()) { | |
| 1627 case SkClipStack::Element::kRect_Type: | |
| 1628 element->getRect().round(&ir); | |
| 1629 tmpClip.op(ir, element->getOp()); | |
| 1630 break; | |
| 1631 case SkClipStack::Element::kEmpty_Type: | |
| 1632 tmpClip.setEmpty(); | |
| 1633 break; | |
| 1634 default: { | |
| 1635 SkPath path; | |
| 1636 element->asPath(&path); | |
| 1637 clip_path_helper(this, &tmpClip, path, element->getOp(), element->isAA()); | |
| 1638 break; | |
| 1639 } | |
| 1640 } | |
| 1641 } | |
| 1642 } | |
| 1643 #endif | |
| 1644 | |
| 1645 void SkCanvas::replayClips(ClipVisitor* visitor) const { | |
| 1646 SkClipStack::B2TIter iter(fClipStack); | |
| 1647 const SkClipStack::Element* element; | |
| 1648 | |
| 1649 static const SkRect kEmpty = { 0, 0, 0, 0 }; | |
| 1650 while ((element = iter.next()) != NULL) { | |
| 1651 switch (element->getType()) { | |
| 1652 case SkClipStack::Element::kPath_Type: | |
| 1653 visitor->clipPath(element->getPath(), element->getOp(), element->isAA()); | |
| 1654 break; | |
| 1655 case SkClipStack::Element::kRRect_Type: | |
| 1656 visitor->clipRRect(element->getRRect(), element->getOp(), element->isAA()); | |
| 1657 break; | |
| 1658 case SkClipStack::Element::kRect_Type: | |
| 1659 visitor->clipRect(element->getRect(), element->getOp(), element->isAA()); | |
| 1660 break; | |
| 1661 case SkClipStack::Element::kEmpty_Type: | |
| 1662 visitor->clipRect(kEmpty, SkRegion::kIntersect_Op, false); | |
| 1663 break; | |
| 1664 } | |
| 1665 } | |
| 1666 } | |
| 1667 | |
| 1668 /////////////////////////////////////////////////////////////////////////////// | |
| 1669 | |
| 1670 bool SkCanvas::isClipEmpty() const { | |
| 1671 return fMCRec->fRasterClip->isEmpty(); | |
| 1672 } | |
| 1673 | |
| 1674 bool SkCanvas::isClipRect() const { | |
| 1675 return fMCRec->fRasterClip->isRect(); | |
| 1676 } | |
| 1677 | |
| 1678 bool SkCanvas::quickReject(const SkRect& rect) const { | |
| 1679 | |
| 1680 if (!rect.isFinite()) | |
| 1681 return true; | |
| 1682 | |
| 1683 if (fMCRec->fRasterClip->isEmpty()) { | |
| 1684 return true; | |
| 1685 } | |
| 1686 | |
| 1687 if (fMCRec->fMatrix->hasPerspective()) { | |
| 1688 SkRect dst; | |
| 1689 fMCRec->fMatrix->mapRect(&dst, rect); | |
| 1690 SkIRect idst; | |
| 1691 dst.roundOut(&idst); | |
| 1692 return !SkIRect::Intersects(idst, fMCRec->fRasterClip->getBounds()); | |
| 1693 } else { | |
| 1694 const SkRect& clipR = this->getLocalClipBounds(); | |
| 1695 | |
| 1696 // for speed, do the most likely reject compares first | |
| 1697 // TODO: should we use | instead, or compare all 4 at once? | |
| 1698 if (rect.fTop >= clipR.fBottom || rect.fBottom <= clipR.fTop) { | |
| 1699 return true; | |
| 1700 } | |
| 1701 if (rect.fLeft >= clipR.fRight || rect.fRight <= clipR.fLeft) { | |
| 1702 return true; | |
| 1703 } | |
| 1704 return false; | |
| 1705 } | |
| 1706 } | |
| 1707 | |
| 1708 bool SkCanvas::quickReject(const SkPath& path) const { | |
| 1709 return path.isEmpty() || this->quickReject(path.getBounds()); | |
| 1710 } | |
| 1711 | |
| 1712 bool SkCanvas::getClipBounds(SkRect* bounds) const { | |
| 1713 SkIRect ibounds; | |
| 1714 if (!this->getClipDeviceBounds(&ibounds)) { | |
| 1715 return false; | |
| 1716 } | |
| 1717 | |
| 1718 SkMatrix inverse; | |
| 1719 // if we can't invert the CTM, we can't return local clip bounds | |
| 1720 if (!fMCRec->fMatrix->invert(&inverse)) { | |
| 1721 if (bounds) { | |
| 1722 bounds->setEmpty(); | |
| 1723 } | |
| 1724 return false; | |
| 1725 } | |
| 1726 | |
| 1727 if (NULL != bounds) { | |
| 1728 SkRect r; | |
| 1729 // adjust it outwards in case we are antialiasing | |
| 1730 const int inset = 1; | |
| 1731 | |
| 1732 r.iset(ibounds.fLeft - inset, ibounds.fTop - inset, | |
| 1733 ibounds.fRight + inset, ibounds.fBottom + inset); | |
| 1734 inverse.mapRect(bounds, r); | |
| 1735 } | |
| 1736 return true; | |
| 1737 } | |
| 1738 | |
| 1739 bool SkCanvas::getClipDeviceBounds(SkIRect* bounds) const { | |
| 1740 const SkRasterClip& clip = *fMCRec->fRasterClip; | |
| 1741 if (clip.isEmpty()) { | |
| 1742 if (bounds) { | |
| 1743 bounds->setEmpty(); | |
| 1744 } | |
| 1745 return false; | |
| 1746 } | |
| 1747 | |
| 1748 if (NULL != bounds) { | |
| 1749 *bounds = clip.getBounds(); | |
| 1750 } | |
| 1751 return true; | |
| 1752 } | |
| 1753 | |
| 1754 const SkMatrix& SkCanvas::getTotalMatrix() const { | |
| 1755 return *fMCRec->fMatrix; | |
| 1756 } | |
| 1757 | |
| 1758 #ifdef SK_SUPPORT_LEGACY_GETCLIPTYPE | |
| 1759 SkCanvas::ClipType SkCanvas::getClipType() const { | |
| 1760 if (fMCRec->fRasterClip->isEmpty()) { | |
| 1761 return kEmpty_ClipType; | |
| 1762 } | |
| 1763 if (fMCRec->fRasterClip->isRect()) { | |
| 1764 return kRect_ClipType; | |
| 1765 } | |
| 1766 return kComplex_ClipType; | |
| 1767 } | |
| 1768 #endif | |
| 1769 | |
| 1770 #ifdef SK_SUPPORT_LEGACY_GETTOTALCLIP | |
| 1771 const SkRegion& SkCanvas::getTotalClip() const { | |
| 1772 return fMCRec->fRasterClip->forceGetBW(); | |
| 1773 } | |
| 1774 #endif | |
| 1775 | |
| 1776 const SkRegion& SkCanvas::internal_private_getTotalClip() const { | |
| 1777 return fMCRec->fRasterClip->forceGetBW(); | |
| 1778 } | |
| 1779 | |
| 1780 void SkCanvas::internal_private_getTotalClipAsPath(SkPath* path) const { | |
| 1781 path->reset(); | |
| 1782 | |
| 1783 const SkRegion& rgn = fMCRec->fRasterClip->forceGetBW(); | |
| 1784 if (rgn.isEmpty()) { | |
| 1785 return; | |
| 1786 } | |
| 1787 (void)rgn.getBoundaryPath(path); | |
| 1788 } | |
| 1789 | |
| 1790 GrRenderTarget* SkCanvas::internal_private_accessTopLayerRenderTarget() { | |
| 1791 SkBaseDevice* dev = this->getTopDevice(); | |
| 1792 return dev ? dev->accessRenderTarget() : NULL; | |
| 1793 } | |
| 1794 | |
| 1795 SkBaseDevice* SkCanvas::createLayerDevice(const SkImageInfo& info) { | |
| 1796 SkBaseDevice* device = this->getTopDevice(); | |
| 1797 return device ? device->createCompatibleDeviceForSaveLayer(info) : NULL; | |
| 1798 } | |
| 1799 | |
| 1800 GrContext* SkCanvas::getGrContext() { | |
| 1801 #if SK_SUPPORT_GPU | |
| 1802 SkBaseDevice* device = this->getTopDevice(); | |
| 1803 if (NULL != device) { | |
| 1804 GrRenderTarget* renderTarget = device->accessRenderTarget(); | |
| 1805 if (NULL != renderTarget) { | |
| 1806 return renderTarget->getContext(); | |
| 1807 } | |
| 1808 } | |
| 1809 #endif | |
| 1810 | |
| 1811 return NULL; | |
| 1812 | |
| 1813 } | |
| 1814 | |
| 1815 void SkCanvas::drawDRRect(const SkRRect& outer, const SkRRect& inner, | |
| 1816 const SkPaint& paint) { | |
| 1817 if (outer.isEmpty()) { | |
| 1818 return; | |
| 1819 } | |
| 1820 if (inner.isEmpty()) { | |
| 1821 this->drawRRect(outer, paint); | |
| 1822 return; | |
| 1823 } | |
| 1824 | |
| 1825 // We don't have this method (yet), but technically this is what we should | |
| 1826 // be able to assert... | |
| 1827 // SkASSERT(outer.contains(inner)); | |
| 1828 // | |
| 1829 // For now at least check for containment of bounds | |
| 1830 SkASSERT(outer.getBounds().contains(inner.getBounds())); | |
| 1831 | |
| 1832 this->onDrawDRRect(outer, inner, paint); | |
| 1833 } | |
| 1834 | |
| 1835 ////////////////////////////////////////////////////////////////////////////// | |
| 1836 // These are the virtual drawing methods | |
| 1837 ////////////////////////////////////////////////////////////////////////////// | |
| 1838 | |
| 1839 void SkCanvas::clear(SkColor color) { | |
| 1840 SkDrawIter iter(this); | |
| 1841 this->predrawNotify(); | |
| 1842 while (iter.next()) { | |
| 1843 iter.fDevice->clear(color); | |
| 1844 } | |
| 1845 } | |
| 1846 | |
| 1847 void SkCanvas::drawPaint(const SkPaint& paint) { | |
| 1848 this->internalDrawPaint(paint); | |
| 1849 } | |
| 1850 | |
| 1851 void SkCanvas::internalDrawPaint(const SkPaint& paint) { | |
| 1852 CHECK_SHADER_NOSETCONTEXT(paint); | |
| 1853 | |
| 1854 LOOPER_BEGIN(paint, SkDrawFilter::kPaint_Type, NULL) | |
| 1855 | |
| 1856 while (iter.next()) { | |
| 1857 iter.fDevice->drawPaint(iter, looper.paint()); | |
| 1858 } | |
| 1859 | |
| 1860 LOOPER_END | |
| 1861 } | |
| 1862 | |
| 1863 void SkCanvas::drawPoints(PointMode mode, size_t count, const SkPoint pts[], | |
| 1864 const SkPaint& paint) { | |
| 1865 if ((long)count <= 0) { | |
| 1866 return; | |
| 1867 } | |
| 1868 | |
| 1869 CHECK_SHADER_NOSETCONTEXT(paint); | |
| 1870 | |
| 1871 SkRect r, storage; | |
| 1872 const SkRect* bounds = NULL; | |
| 1873 if (paint.canComputeFastBounds()) { | |
| 1874 // special-case 2 points (common for drawing a single line) | |
| 1875 if (2 == count) { | |
| 1876 r.set(pts[0], pts[1]); | |
| 1877 } else { | |
| 1878 r.set(pts, SkToInt(count)); | |
| 1879 } | |
| 1880 bounds = &paint.computeFastStrokeBounds(r, &storage); | |
| 1881 if (this->quickReject(*bounds)) { | |
| 1882 return; | |
| 1883 } | |
| 1884 } | |
| 1885 | |
| 1886 SkASSERT(pts != NULL); | |
| 1887 | |
| 1888 LOOPER_BEGIN(paint, SkDrawFilter::kPoint_Type, bounds) | |
| 1889 | |
| 1890 while (iter.next()) { | |
| 1891 iter.fDevice->drawPoints(iter, mode, count, pts, looper.paint()); | |
| 1892 } | |
| 1893 | |
| 1894 LOOPER_END | |
| 1895 } | |
| 1896 | |
| 1897 void SkCanvas::drawRect(const SkRect& r, const SkPaint& paint) { | |
| 1898 CHECK_SHADER_NOSETCONTEXT(paint); | |
| 1899 | |
| 1900 SkRect storage; | |
| 1901 const SkRect* bounds = NULL; | |
| 1902 if (paint.canComputeFastBounds()) { | |
| 1903 bounds = &paint.computeFastBounds(r, &storage); | |
| 1904 if (this->quickReject(*bounds)) { | |
| 1905 return; | |
| 1906 } | |
| 1907 } | |
| 1908 | |
| 1909 LOOPER_BEGIN(paint, SkDrawFilter::kRect_Type, bounds) | |
| 1910 | |
| 1911 while (iter.next()) { | |
| 1912 iter.fDevice->drawRect(iter, r, looper.paint()); | |
| 1913 } | |
| 1914 | |
| 1915 LOOPER_END | |
| 1916 } | |
| 1917 | |
| 1918 void SkCanvas::drawOval(const SkRect& oval, const SkPaint& paint) { | |
| 1919 CHECK_SHADER_NOSETCONTEXT(paint); | |
| 1920 | |
| 1921 SkRect storage; | |
| 1922 const SkRect* bounds = NULL; | |
| 1923 if (paint.canComputeFastBounds()) { | |
| 1924 bounds = &paint.computeFastBounds(oval, &storage); | |
| 1925 if (this->quickReject(*bounds)) { | |
| 1926 return; | |
| 1927 } | |
| 1928 } | |
| 1929 | |
| 1930 LOOPER_BEGIN(paint, SkDrawFilter::kOval_Type, bounds) | |
| 1931 | |
| 1932 while (iter.next()) { | |
| 1933 iter.fDevice->drawOval(iter, oval, looper.paint()); | |
| 1934 } | |
| 1935 | |
| 1936 LOOPER_END | |
| 1937 } | |
| 1938 | |
| 1939 void SkCanvas::drawRRect(const SkRRect& rrect, const SkPaint& paint) { | |
| 1940 CHECK_SHADER_NOSETCONTEXT(paint); | |
| 1941 | |
| 1942 SkRect storage; | |
| 1943 const SkRect* bounds = NULL; | |
| 1944 if (paint.canComputeFastBounds()) { | |
| 1945 bounds = &paint.computeFastBounds(rrect.getBounds(), &storage); | |
| 1946 if (this->quickReject(*bounds)) { | |
| 1947 return; | |
| 1948 } | |
| 1949 } | |
| 1950 | |
| 1951 if (rrect.isRect()) { | |
| 1952 // call the non-virtual version | |
| 1953 this->SkCanvas::drawRect(rrect.getBounds(), paint); | |
| 1954 return; | |
| 1955 } else if (rrect.isOval()) { | |
| 1956 // call the non-virtual version | |
| 1957 this->SkCanvas::drawOval(rrect.getBounds(), paint); | |
| 1958 return; | |
| 1959 } | |
| 1960 | |
| 1961 LOOPER_BEGIN(paint, SkDrawFilter::kRRect_Type, bounds) | |
| 1962 | |
| 1963 while (iter.next()) { | |
| 1964 iter.fDevice->drawRRect(iter, rrect, looper.paint()); | |
| 1965 } | |
| 1966 | |
| 1967 LOOPER_END | |
| 1968 } | |
| 1969 | |
| 1970 void SkCanvas::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, | |
| 1971 const SkPaint& paint) { | |
| 1972 CHECK_SHADER_NOSETCONTEXT(paint); | |
| 1973 | |
| 1974 SkRect storage; | |
| 1975 const SkRect* bounds = NULL; | |
| 1976 if (paint.canComputeFastBounds()) { | |
| 1977 bounds = &paint.computeFastBounds(outer.getBounds(), &storage); | |
| 1978 if (this->quickReject(*bounds)) { | |
| 1979 return; | |
| 1980 } | |
| 1981 } | |
| 1982 | |
| 1983 LOOPER_BEGIN(paint, SkDrawFilter::kRRect_Type, bounds) | |
| 1984 | |
| 1985 while (iter.next()) { | |
| 1986 iter.fDevice->drawDRRect(iter, outer, inner, looper.paint()); | |
| 1987 } | |
| 1988 | |
| 1989 LOOPER_END | |
| 1990 } | |
| 1991 | |
| 1992 void SkCanvas::drawPath(const SkPath& path, const SkPaint& paint) { | |
| 1993 CHECK_SHADER_NOSETCONTEXT(paint); | |
| 1994 | |
| 1995 if (!path.isFinite()) { | |
| 1996 return; | |
| 1997 } | |
| 1998 | |
| 1999 SkRect storage; | |
| 2000 const SkRect* bounds = NULL; | |
| 2001 if (!path.isInverseFillType() && paint.canComputeFastBounds()) { | |
| 2002 const SkRect& pathBounds = path.getBounds(); | |
| 2003 bounds = &paint.computeFastBounds(pathBounds, &storage); | |
| 2004 if (this->quickReject(*bounds)) { | |
| 2005 return; | |
| 2006 } | |
| 2007 } | |
| 2008 | |
| 2009 const SkRect& r = path.getBounds(); | |
| 2010 if (r.width() <= 0 && r.height() <= 0) { | |
| 2011 if (path.isInverseFillType()) { | |
| 2012 this->internalDrawPaint(paint); | |
| 2013 } | |
| 2014 return; | |
| 2015 } | |
| 2016 | |
| 2017 LOOPER_BEGIN(paint, SkDrawFilter::kPath_Type, bounds) | |
| 2018 | |
| 2019 while (iter.next()) { | |
| 2020 iter.fDevice->drawPath(iter, path, looper.paint()); | |
| 2021 } | |
| 2022 | |
| 2023 LOOPER_END | |
| 2024 } | |
| 2025 | |
| 2026 void SkCanvas::drawBitmap(const SkBitmap& bitmap, SkScalar x, SkScalar y, | |
| 2027 const SkPaint* paint) { | |
| 2028 SkDEBUGCODE(bitmap.validate();) | |
| 2029 | |
| 2030 if (NULL == paint || paint->canComputeFastBounds()) { | |
| 2031 SkRect bounds = { | |
| 2032 x, y, | |
| 2033 x + SkIntToScalar(bitmap.width()), | |
| 2034 y + SkIntToScalar(bitmap.height()) | |
| 2035 }; | |
| 2036 if (paint) { | |
| 2037 (void)paint->computeFastBounds(bounds, &bounds); | |
| 2038 } | |
| 2039 if (this->quickReject(bounds)) { | |
| 2040 return; | |
| 2041 } | |
| 2042 } | |
| 2043 | |
| 2044 SkMatrix matrix; | |
| 2045 matrix.setTranslate(x, y); | |
| 2046 this->internalDrawBitmap(bitmap, matrix, paint); | |
| 2047 } | |
| 2048 | |
| 2049 // this one is non-virtual, so it can be called safely by other canvas apis | |
| 2050 void SkCanvas::internalDrawBitmapRect(const SkBitmap& bitmap, const SkRect* src, | |
| 2051 const SkRect& dst, const SkPaint* paint, | |
| 2052 DrawBitmapRectFlags flags) { | |
| 2053 if (bitmap.drawsNothing() || dst.isEmpty()) { | |
| 2054 return; | |
| 2055 } | |
| 2056 | |
| 2057 CHECK_LOCKCOUNT_BALANCE(bitmap); | |
| 2058 | |
| 2059 SkRect storage; | |
| 2060 const SkRect* bounds = &dst; | |
| 2061 if (NULL == paint || paint->canComputeFastBounds()) { | |
| 2062 if (paint) { | |
| 2063 bounds = &paint->computeFastBounds(dst, &storage); | |
| 2064 } | |
| 2065 if (this->quickReject(*bounds)) { | |
| 2066 return; | |
| 2067 } | |
| 2068 } | |
| 2069 | |
| 2070 SkLazyPaint lazy; | |
| 2071 if (NULL == paint) { | |
| 2072 paint = lazy.init(); | |
| 2073 } | |
| 2074 | |
| 2075 LOOPER_BEGIN(*paint, SkDrawFilter::kBitmap_Type, bounds) | |
| 2076 | |
| 2077 while (iter.next()) { | |
| 2078 iter.fDevice->drawBitmapRect(iter, bitmap, src, dst, looper.paint(), flags); | |
| 2079 } | |
| 2080 | |
| 2081 LOOPER_END | |
| 2082 } | |
| 2083 | |
| 2084 void SkCanvas::drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src, | |
| 2085 const SkRect& dst, const SkPaint* paint, | |
| 2086 DrawBitmapRectFlags flags) { | |
| 2087 SkDEBUGCODE(bitmap.validate();) | |
| 2088 this->internalDrawBitmapRect(bitmap, src, dst, paint, flags); | |
| 2089 } | |
| 2090 | |
| 2091 void SkCanvas::drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& matrix, | |
| 2092 const SkPaint* paint) { | |
| 2093 SkDEBUGCODE(bitmap.validate();) | |
| 2094 this->internalDrawBitmap(bitmap, matrix, paint); | |
| 2095 } | |
| 2096 | |
| 2097 void SkCanvas::internalDrawBitmapNine(const SkBitmap& bitmap, | |
| 2098 const SkIRect& center, const SkRect& dst, | |
| 2099 const SkPaint* paint) { | |
| 2100 if (bitmap.drawsNothing()) { | |
| 2101 return; | |
| 2102 } | |
| 2103 if (NULL == paint || paint->canComputeFastBounds()) { | |
| 2104 SkRect storage; | |
| 2105 const SkRect* bounds = &dst; | |
| 2106 if (paint) { | |
| 2107 bounds = &paint->computeFastBounds(dst, &storage); | |
| 2108 } | |
| 2109 if (this->quickReject(*bounds)) { | |
| 2110 return; | |
| 2111 } | |
| 2112 } | |
| 2113 | |
| 2114 const int32_t w = bitmap.width(); | |
| 2115 const int32_t h = bitmap.height(); | |
| 2116 | |
| 2117 SkIRect c = center; | |
| 2118 // pin center to the bounds of the bitmap | |
| 2119 c.fLeft = SkMax32(0, center.fLeft); | |
| 2120 c.fTop = SkMax32(0, center.fTop); | |
| 2121 c.fRight = SkPin32(center.fRight, c.fLeft, w); | |
| 2122 c.fBottom = SkPin32(center.fBottom, c.fTop, h); | |
| 2123 | |
| 2124 const SkScalar srcX[4] = { | |
| 2125 0, SkIntToScalar(c.fLeft), SkIntToScalar(c.fRight), SkIntToScalar(w) | |
| 2126 }; | |
| 2127 const SkScalar srcY[4] = { | |
| 2128 0, SkIntToScalar(c.fTop), SkIntToScalar(c.fBottom), SkIntToScalar(h) | |
| 2129 }; | |
| 2130 SkScalar dstX[4] = { | |
| 2131 dst.fLeft, dst.fLeft + SkIntToScalar(c.fLeft), | |
| 2132 dst.fRight - SkIntToScalar(w - c.fRight), dst.fRight | |
| 2133 }; | |
| 2134 SkScalar dstY[4] = { | |
| 2135 dst.fTop, dst.fTop + SkIntToScalar(c.fTop), | |
| 2136 dst.fBottom - SkIntToScalar(h - c.fBottom), dst.fBottom | |
| 2137 }; | |
| 2138 | |
| 2139 if (dstX[1] > dstX[2]) { | |
| 2140 dstX[1] = dstX[0] + (dstX[3] - dstX[0]) * c.fLeft / (w - c.width()); | |
| 2141 dstX[2] = dstX[1]; | |
| 2142 } | |
| 2143 | |
| 2144 if (dstY[1] > dstY[2]) { | |
| 2145 dstY[1] = dstY[0] + (dstY[3] - dstY[0]) * c.fTop / (h - c.height()); | |
| 2146 dstY[2] = dstY[1]; | |
| 2147 } | |
| 2148 | |
| 2149 for (int y = 0; y < 3; y++) { | |
| 2150 SkRect s, d; | |
| 2151 | |
| 2152 s.fTop = srcY[y]; | |
| 2153 s.fBottom = srcY[y+1]; | |
| 2154 d.fTop = dstY[y]; | |
| 2155 d.fBottom = dstY[y+1]; | |
| 2156 for (int x = 0; x < 3; x++) { | |
| 2157 s.fLeft = srcX[x]; | |
| 2158 s.fRight = srcX[x+1]; | |
| 2159 d.fLeft = dstX[x]; | |
| 2160 d.fRight = dstX[x+1]; | |
| 2161 this->internalDrawBitmapRect(bitmap, &s, d, paint, | |
| 2162 kNone_DrawBitmapRectFlag); | |
| 2163 } | |
| 2164 } | |
| 2165 } | |
| 2166 | |
| 2167 void SkCanvas::drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center, | |
| 2168 const SkRect& dst, const SkPaint* paint) { | |
| 2169 SkDEBUGCODE(bitmap.validate();) | |
| 2170 | |
| 2171 // Need a device entry-point, so gpu can use a mesh | |
| 2172 this->internalDrawBitmapNine(bitmap, center, dst, paint); | |
| 2173 } | |
| 2174 | |
| 2175 class SkDeviceFilteredPaint { | |
| 2176 public: | |
| 2177 SkDeviceFilteredPaint(SkBaseDevice* device, const SkPaint& paint) { | |
| 2178 SkBaseDevice::TextFlags flags; | |
| 2179 if (device->filterTextFlags(paint, &flags)) { | |
| 2180 SkPaint* newPaint = fLazy.set(paint); | |
| 2181 newPaint->setFlags(flags.fFlags); | |
| 2182 newPaint->setHinting(flags.fHinting); | |
| 2183 fPaint = newPaint; | |
| 2184 } else { | |
| 2185 fPaint = &paint; | |
| 2186 } | |
| 2187 } | |
| 2188 | |
| 2189 const SkPaint& paint() const { return *fPaint; } | |
| 2190 | |
| 2191 private: | |
| 2192 const SkPaint* fPaint; | |
| 2193 SkLazyPaint fLazy; | |
| 2194 }; | |
| 2195 | |
| 2196 void SkCanvas::DrawRect(const SkDraw& draw, const SkPaint& paint, | |
| 2197 const SkRect& r, SkScalar textSize) { | |
| 2198 if (paint.getStyle() == SkPaint::kFill_Style) { | |
| 2199 draw.fDevice->drawRect(draw, r, paint); | |
| 2200 } else { | |
| 2201 SkPaint p(paint); | |
| 2202 p.setStrokeWidth(SkScalarMul(textSize, paint.getStrokeWidth())); | |
| 2203 draw.fDevice->drawRect(draw, r, p); | |
| 2204 } | |
| 2205 } | |
| 2206 | |
| 2207 void SkCanvas::DrawTextDecorations(const SkDraw& draw, const SkPaint& paint, | |
| 2208 const char text[], size_t byteLength, | |
| 2209 SkScalar x, SkScalar y) { | |
| 2210 SkASSERT(byteLength == 0 || text != NULL); | |
| 2211 | |
| 2212 // nothing to draw | |
| 2213 if (text == NULL || byteLength == 0 || | |
| 2214 draw.fClip->isEmpty() || | |
| 2215 (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) { | |
| 2216 return; | |
| 2217 } | |
| 2218 | |
| 2219 SkScalar width = 0; | |
| 2220 SkPoint start; | |
| 2221 | |
| 2222 start.set(0, 0); // to avoid warning | |
| 2223 if (paint.getFlags() & (SkPaint::kUnderlineText_Flag | | |
| 2224 SkPaint::kStrikeThruText_Flag)) { | |
| 2225 width = paint.measureText(text, byteLength); | |
| 2226 | |
| 2227 SkScalar offsetX = 0; | |
| 2228 if (paint.getTextAlign() == SkPaint::kCenter_Align) { | |
| 2229 offsetX = SkScalarHalf(width); | |
| 2230 } else if (paint.getTextAlign() == SkPaint::kRight_Align) { | |
| 2231 offsetX = width; | |
| 2232 } | |
| 2233 start.set(x - offsetX, y); | |
| 2234 } | |
| 2235 | |
| 2236 if (0 == width) { | |
| 2237 return; | |
| 2238 } | |
| 2239 | |
| 2240 uint32_t flags = paint.getFlags(); | |
| 2241 | |
| 2242 if (flags & (SkPaint::kUnderlineText_Flag | | |
| 2243 SkPaint::kStrikeThruText_Flag)) { | |
| 2244 SkScalar textSize = paint.getTextSize(); | |
| 2245 SkScalar height = SkScalarMul(textSize, kStdUnderline_Thickness); | |
| 2246 SkRect r; | |
| 2247 | |
| 2248 r.fLeft = start.fX; | |
| 2249 r.fRight = start.fX + width; | |
| 2250 | |
| 2251 if (flags & SkPaint::kUnderlineText_Flag) { | |
| 2252 SkScalar offset = SkScalarMulAdd(textSize, kStdUnderline_Offset, | |
| 2253 start.fY); | |
| 2254 r.fTop = offset; | |
| 2255 r.fBottom = offset + height; | |
| 2256 DrawRect(draw, paint, r, textSize); | |
| 2257 } | |
| 2258 if (flags & SkPaint::kStrikeThruText_Flag) { | |
| 2259 SkScalar offset = SkScalarMulAdd(textSize, kStdStrikeThru_Offset, | |
| 2260 start.fY); | |
| 2261 r.fTop = offset; | |
| 2262 r.fBottom = offset + height; | |
| 2263 DrawRect(draw, paint, r, textSize); | |
| 2264 } | |
| 2265 } | |
| 2266 } | |
| 2267 | |
| 2268 void SkCanvas::drawText(const void* text, size_t byteLength, | |
| 2269 SkScalar x, SkScalar y, const SkPaint& paint) { | |
| 2270 CHECK_SHADER_NOSETCONTEXT(paint); | |
| 2271 | |
| 2272 LOOPER_BEGIN(paint, SkDrawFilter::kText_Type, NULL) | |
| 2273 | |
| 2274 while (iter.next()) { | |
| 2275 SkDeviceFilteredPaint dfp(iter.fDevice, looper.paint()); | |
| 2276 iter.fDevice->drawText(iter, text, byteLength, x, y, dfp.paint()); | |
| 2277 DrawTextDecorations(iter, dfp.paint(), | |
| 2278 static_cast<const char*>(text), byteLength, x, y); | |
| 2279 } | |
| 2280 | |
| 2281 LOOPER_END | |
| 2282 } | |
| 2283 | |
| 2284 void SkCanvas::drawPosText(const void* text, size_t byteLength, | |
| 2285 const SkPoint pos[], const SkPaint& paint) { | |
| 2286 CHECK_SHADER_NOSETCONTEXT(paint); | |
| 2287 | |
| 2288 LOOPER_BEGIN(paint, SkDrawFilter::kText_Type, NULL) | |
| 2289 | |
| 2290 while (iter.next()) { | |
| 2291 SkDeviceFilteredPaint dfp(iter.fDevice, looper.paint()); | |
| 2292 iter.fDevice->drawPosText(iter, text, byteLength, &pos->fX, 0, 2, | |
| 2293 dfp.paint()); | |
| 2294 } | |
| 2295 | |
| 2296 LOOPER_END | |
| 2297 } | |
| 2298 | |
| 2299 void SkCanvas::drawPosTextH(const void* text, size_t byteLength, | |
| 2300 const SkScalar xpos[], SkScalar constY, | |
| 2301 const SkPaint& paint) { | |
| 2302 CHECK_SHADER_NOSETCONTEXT(paint); | |
| 2303 | |
| 2304 LOOPER_BEGIN(paint, SkDrawFilter::kText_Type, NULL) | |
| 2305 | |
| 2306 while (iter.next()) { | |
| 2307 SkDeviceFilteredPaint dfp(iter.fDevice, looper.paint()); | |
| 2308 iter.fDevice->drawPosText(iter, text, byteLength, xpos, constY, 1, | |
| 2309 dfp.paint()); | |
| 2310 } | |
| 2311 | |
| 2312 LOOPER_END | |
| 2313 } | |
| 2314 | |
| 2315 void SkCanvas::drawTextOnPath(const void* text, size_t byteLength, | |
| 2316 const SkPath& path, const SkMatrix* matrix, | |
| 2317 const SkPaint& paint) { | |
| 2318 CHECK_SHADER_NOSETCONTEXT(paint); | |
| 2319 | |
| 2320 LOOPER_BEGIN(paint, SkDrawFilter::kText_Type, NULL) | |
| 2321 | |
| 2322 while (iter.next()) { | |
| 2323 iter.fDevice->drawTextOnPath(iter, text, byteLength, path, | |
| 2324 matrix, looper.paint()); | |
| 2325 } | |
| 2326 | |
| 2327 LOOPER_END | |
| 2328 } | |
| 2329 | |
| 2330 void SkCanvas::drawVertices(VertexMode vmode, int vertexCount, | |
| 2331 const SkPoint verts[], const SkPoint texs[], | |
| 2332 const SkColor colors[], SkXfermode* xmode, | |
| 2333 const uint16_t indices[], int indexCount, | |
| 2334 const SkPaint& paint) { | |
| 2335 CHECK_SHADER_NOSETCONTEXT(paint); | |
| 2336 | |
| 2337 LOOPER_BEGIN(paint, SkDrawFilter::kPath_Type, NULL) | |
| 2338 | |
| 2339 while (iter.next()) { | |
| 2340 iter.fDevice->drawVertices(iter, vmode, vertexCount, verts, texs, | |
| 2341 colors, xmode, indices, indexCount, | |
| 2342 looper.paint()); | |
| 2343 } | |
| 2344 | |
| 2345 LOOPER_END | |
| 2346 } | |
| 2347 | |
| 2348 ////////////////////////////////////////////////////////////////////////////// | |
| 2349 // These methods are NOT virtual, and therefore must call back into virtual | |
| 2350 // methods, rather than actually drawing themselves. | |
| 2351 ////////////////////////////////////////////////////////////////////////////// | |
| 2352 | |
| 2353 void SkCanvas::drawARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b, | |
| 2354 SkXfermode::Mode mode) { | |
| 2355 SkPaint paint; | |
| 2356 | |
| 2357 paint.setARGB(a, r, g, b); | |
| 2358 if (SkXfermode::kSrcOver_Mode != mode) { | |
| 2359 paint.setXfermodeMode(mode); | |
| 2360 } | |
| 2361 this->drawPaint(paint); | |
| 2362 } | |
| 2363 | |
| 2364 void SkCanvas::drawColor(SkColor c, SkXfermode::Mode mode) { | |
| 2365 SkPaint paint; | |
| 2366 | |
| 2367 paint.setColor(c); | |
| 2368 if (SkXfermode::kSrcOver_Mode != mode) { | |
| 2369 paint.setXfermodeMode(mode); | |
| 2370 } | |
| 2371 this->drawPaint(paint); | |
| 2372 } | |
| 2373 | |
| 2374 void SkCanvas::drawPoint(SkScalar x, SkScalar y, const SkPaint& paint) { | |
| 2375 SkPoint pt; | |
| 2376 | |
| 2377 pt.set(x, y); | |
| 2378 this->drawPoints(kPoints_PointMode, 1, &pt, paint); | |
| 2379 } | |
| 2380 | |
| 2381 void SkCanvas::drawPoint(SkScalar x, SkScalar y, SkColor color) { | |
| 2382 SkPoint pt; | |
| 2383 SkPaint paint; | |
| 2384 | |
| 2385 pt.set(x, y); | |
| 2386 paint.setColor(color); | |
| 2387 this->drawPoints(kPoints_PointMode, 1, &pt, paint); | |
| 2388 } | |
| 2389 | |
| 2390 void SkCanvas::drawLine(SkScalar x0, SkScalar y0, SkScalar x1, SkScalar y1, | |
| 2391 const SkPaint& paint) { | |
| 2392 SkPoint pts[2]; | |
| 2393 | |
| 2394 pts[0].set(x0, y0); | |
| 2395 pts[1].set(x1, y1); | |
| 2396 this->drawPoints(kLines_PointMode, 2, pts, paint); | |
| 2397 } | |
| 2398 | |
| 2399 void SkCanvas::drawRectCoords(SkScalar left, SkScalar top, | |
| 2400 SkScalar right, SkScalar bottom, | |
| 2401 const SkPaint& paint) { | |
| 2402 SkRect r; | |
| 2403 | |
| 2404 r.set(left, top, right, bottom); | |
| 2405 this->drawRect(r, paint); | |
| 2406 } | |
| 2407 | |
| 2408 void SkCanvas::drawCircle(SkScalar cx, SkScalar cy, SkScalar radius, | |
| 2409 const SkPaint& paint) { | |
| 2410 if (radius < 0) { | |
| 2411 radius = 0; | |
| 2412 } | |
| 2413 | |
| 2414 SkRect r; | |
| 2415 r.set(cx - radius, cy - radius, cx + radius, cy + radius); | |
| 2416 this->drawOval(r, paint); | |
| 2417 } | |
| 2418 | |
| 2419 void SkCanvas::drawRoundRect(const SkRect& r, SkScalar rx, SkScalar ry, | |
| 2420 const SkPaint& paint) { | |
| 2421 if (rx > 0 && ry > 0) { | |
| 2422 if (paint.canComputeFastBounds()) { | |
| 2423 SkRect storage; | |
| 2424 if (this->quickReject(paint.computeFastBounds(r, &storage))) { | |
| 2425 return; | |
| 2426 } | |
| 2427 } | |
| 2428 SkRRect rrect; | |
| 2429 rrect.setRectXY(r, rx, ry); | |
| 2430 this->drawRRect(rrect, paint); | |
| 2431 } else { | |
| 2432 this->drawRect(r, paint); | |
| 2433 } | |
| 2434 } | |
| 2435 | |
| 2436 void SkCanvas::drawArc(const SkRect& oval, SkScalar startAngle, | |
| 2437 SkScalar sweepAngle, bool useCenter, | |
| 2438 const SkPaint& paint) { | |
| 2439 if (SkScalarAbs(sweepAngle) >= SkIntToScalar(360)) { | |
| 2440 this->drawOval(oval, paint); | |
| 2441 } else { | |
| 2442 SkPath path; | |
| 2443 if (useCenter) { | |
| 2444 path.moveTo(oval.centerX(), oval.centerY()); | |
| 2445 } | |
| 2446 path.arcTo(oval, startAngle, sweepAngle, !useCenter); | |
| 2447 if (useCenter) { | |
| 2448 path.close(); | |
| 2449 } | |
| 2450 this->drawPath(path, paint); | |
| 2451 } | |
| 2452 } | |
| 2453 | |
| 2454 void SkCanvas::drawTextOnPathHV(const void* text, size_t byteLength, | |
| 2455 const SkPath& path, SkScalar hOffset, | |
| 2456 SkScalar vOffset, const SkPaint& paint) { | |
| 2457 SkMatrix matrix; | |
| 2458 | |
| 2459 matrix.setTranslate(hOffset, vOffset); | |
| 2460 this->drawTextOnPath(text, byteLength, path, &matrix, paint); | |
| 2461 } | |
| 2462 | |
| 2463 /////////////////////////////////////////////////////////////////////////////// | |
| 2464 void SkCanvas::EXPERIMENTAL_optimize(SkPicture* picture) { | |
| 2465 SkBaseDevice* device = this->getDevice(); | |
| 2466 if (NULL != device) { | |
| 2467 device->EXPERIMENTAL_optimize(picture); | |
| 2468 } | |
| 2469 } | |
| 2470 | |
| 2471 void SkCanvas::drawPicture(SkPicture& picture) { | |
| 2472 SkBaseDevice* device = this->getTopDevice(); | |
| 2473 if (NULL != device) { | |
| 2474 // Canvas has to first give the device the opportunity to render | |
| 2475 // the picture itself. | |
| 2476 if (device->EXPERIMENTAL_drawPicture(picture)) { | |
| 2477 return; // the device has rendered the entire picture | |
| 2478 } | |
| 2479 } | |
| 2480 | |
| 2481 picture.draw(this); | |
| 2482 } | |
| 2483 | |
| 2484 /////////////////////////////////////////////////////////////////////////////// | |
| 2485 /////////////////////////////////////////////////////////////////////////////// | |
| 2486 | |
| 2487 SkCanvas::LayerIter::LayerIter(SkCanvas* canvas, bool skipEmptyClips) { | |
| 2488 SK_COMPILE_ASSERT(sizeof(fStorage) >= sizeof(SkDrawIter), fStorage_too_small); | |
| 2489 | |
| 2490 SkASSERT(canvas); | |
| 2491 | |
| 2492 fImpl = new (fStorage) SkDrawIter(canvas, skipEmptyClips); | |
| 2493 fDone = !fImpl->next(); | |
| 2494 } | |
| 2495 | |
| 2496 SkCanvas::LayerIter::~LayerIter() { | |
| 2497 fImpl->~SkDrawIter(); | |
| 2498 } | |
| 2499 | |
| 2500 void SkCanvas::LayerIter::next() { | |
| 2501 fDone = !fImpl->next(); | |
| 2502 } | |
| 2503 | |
| 2504 SkBaseDevice* SkCanvas::LayerIter::device() const { | |
| 2505 return fImpl->getDevice(); | |
| 2506 } | |
| 2507 | |
| 2508 const SkMatrix& SkCanvas::LayerIter::matrix() const { | |
| 2509 return fImpl->getMatrix(); | |
| 2510 } | |
| 2511 | |
| 2512 const SkPaint& SkCanvas::LayerIter::paint() const { | |
| 2513 const SkPaint* paint = fImpl->getPaint(); | |
| 2514 if (NULL == paint) { | |
| 2515 paint = &fDefaultPaint; | |
| 2516 } | |
| 2517 return *paint; | |
| 2518 } | |
| 2519 | |
| 2520 const SkRegion& SkCanvas::LayerIter::clip() const { return fImpl->getClip(); } | |
| 2521 int SkCanvas::LayerIter::x() const { return fImpl->getX(); } | |
| 2522 int SkCanvas::LayerIter::y() const { return fImpl->getY(); } | |
| 2523 | |
| 2524 /////////////////////////////////////////////////////////////////////////////// | |
| 2525 | |
| 2526 SkCanvas::ClipVisitor::~ClipVisitor() { } | |
| 2527 | |
| 2528 /////////////////////////////////////////////////////////////////////////////// | |
| 2529 | |
| 2530 static bool supported_for_raster_canvas(const SkImageInfo& info) { | |
| 2531 switch (info.alphaType()) { | |
| 2532 case kPremul_SkAlphaType: | |
| 2533 case kOpaque_SkAlphaType: | |
| 2534 break; | |
| 2535 default: | |
| 2536 return false; | |
| 2537 } | |
| 2538 | |
| 2539 switch (info.colorType()) { | |
| 2540 case kAlpha_8_SkColorType: | |
| 2541 case kRGB_565_SkColorType: | |
| 2542 case kPMColor_SkColorType: | |
| 2543 break; | |
| 2544 default: | |
| 2545 return false; | |
| 2546 } | |
| 2547 | |
| 2548 return true; | |
| 2549 } | |
| 2550 | |
| 2551 SkCanvas* SkCanvas::NewRaster(const SkImageInfo& info) { | |
| 2552 if (!supported_for_raster_canvas(info)) { | |
| 2553 return NULL; | |
| 2554 } | |
| 2555 | |
| 2556 SkBitmap bitmap; | |
| 2557 if (!bitmap.allocPixels(info)) { | |
| 2558 return NULL; | |
| 2559 } | |
| 2560 | |
| 2561 // should this functionality be moved into allocPixels()? | |
| 2562 if (!bitmap.info().isOpaque()) { | |
| 2563 bitmap.eraseColor(0); | |
| 2564 } | |
| 2565 return SkNEW_ARGS(SkCanvas, (bitmap)); | |
| 2566 } | |
| 2567 | |
| 2568 SkCanvas* SkCanvas::NewRasterDirect(const SkImageInfo& info, void* pixels, size_t rowBytes) { | |
| 2569 if (!supported_for_raster_canvas(info)) { | |
| 2570 return NULL; | |
| 2571 } | |
| 2572 | |
| 2573 SkBitmap bitmap; | |
| 2574 if (!bitmap.installPixels(info, pixels, rowBytes)) { | |
| 2575 return NULL; | |
| 2576 } | |
| 2577 | |
| 2578 // should this functionality be moved into allocPixels()? | |
| 2579 if (!bitmap.info().isOpaque()) { | |
| 2580 bitmap.eraseColor(0); | |
| 2581 } | |
| 2582 return SkNEW_ARGS(SkCanvas, (bitmap)); | |
| 2583 } |
