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| 1 /* | |
| 2 * Copyright (C) 2006-2008 The Android Open Source Project | |
| 3 * | |
| 4 * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 5 * you may not use this file except in compliance with the License. | |
| 6 * You may obtain a copy of the License at | |
| 7 * | |
| 8 * http://www.apache.org/licenses/LICENSE-2.0 | |
| 9 * | |
| 10 * Unless required by applicable law or agreed to in writing, software | |
| 11 * distributed under the License is distributed on an "AS IS" BASIS, | |
| 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 13 * See the License for the specific language governing permissions and | |
| 14 * limitations under the License. | |
| 15 */ | |
| 16 | |
| 17 #include "SkBitmap.h" | |
| 18 #include "SkColorPriv.h" | |
| 19 #include "SkDither.h" | |
| 20 #include "SkFlattenable.h" | |
| 21 #include "SkMallocPixelRef.h" | |
| 22 #include "SkMask.h" | |
| 23 #include "SkPixelRef.h" | |
| 24 #include "SkThread.h" | |
| 25 #include "SkUtils.h" | |
| 26 #include "SkPackBits.h" | |
| 27 #include <new> | |
| 28 | |
| 29 #ifdef SK_SUPPORT_MIPMAP | |
| 30 struct MipLevel { | |
| 31 void* fPixels; | |
| 32 uint32_t fRowBytes; | |
| 33 uint16_t fWidth, fHeight; | |
| 34 }; | |
| 35 | |
| 36 struct SkBitmap::MipMap : SkNoncopyable { | |
| 37 int32_t fRefCnt; | |
| 38 int fLevelCount; | |
| 39 // MipLevel fLevel[fLevelCount]; | |
| 40 // Pixels[] | |
| 41 | |
| 42 static MipMap* Alloc(int levelCount, size_t pixelSize) { | |
| 43 MipMap* mm = (MipMap*)sk_malloc_throw(sizeof(MipMap) + | |
| 44 levelCount * sizeof(MipLevel) + | |
| 45 pixelSize); | |
| 46 mm->fRefCnt = 1; | |
| 47 mm->fLevelCount = levelCount; | |
| 48 return mm; | |
| 49 } | |
| 50 | |
| 51 const MipLevel* levels() const { return (const MipLevel*)(this + 1); } | |
| 52 MipLevel* levels() { return (MipLevel*)(this + 1); } | |
| 53 | |
| 54 const void* pixels() const { return levels() + fLevelCount; } | |
| 55 void* pixels() { return levels() + fLevelCount; } | |
| 56 | |
| 57 void safeRef() { | |
| 58 if (this) { | |
| 59 SkASSERT(fRefCnt > 0); | |
| 60 sk_atomic_inc(&fRefCnt); | |
| 61 } | |
| 62 } | |
| 63 void safeUnref() { | |
| 64 if (this) { | |
| 65 SkASSERT(fRefCnt > 0); | |
| 66 if (sk_atomic_dec(&fRefCnt) == 1) { | |
| 67 sk_free(this); | |
| 68 } | |
| 69 } | |
| 70 } | |
| 71 }; | |
| 72 #endif | |
| 73 | |
| 74 /////////////////////////////////////////////////////////////////////////////// | |
| 75 /////////////////////////////////////////////////////////////////////////////// | |
| 76 | |
| 77 SkBitmap::SkBitmap() { | |
| 78 bzero(this, sizeof(*this)); | |
| 79 } | |
| 80 | |
| 81 SkBitmap::SkBitmap(const SkBitmap& src) { | |
| 82 SkDEBUGCODE(src.validate();) | |
| 83 bzero(this, sizeof(*this)); | |
| 84 *this = src; | |
| 85 SkDEBUGCODE(this->validate();) | |
| 86 } | |
| 87 | |
| 88 SkBitmap::~SkBitmap() { | |
| 89 SkDEBUGCODE(this->validate();) | |
| 90 this->freePixels(); | |
| 91 } | |
| 92 | |
| 93 SkBitmap& SkBitmap::operator=(const SkBitmap& src) { | |
| 94 if (this != &src) { | |
| 95 this->freePixels(); | |
| 96 memcpy(this, &src, sizeof(src)); | |
| 97 | |
| 98 // inc src reference counts | |
| 99 src.fPixelRef->safeRef(); | |
| 100 #ifdef SK_SUPPORT_MIPMAP | |
| 101 src.fMipMap->safeRef(); | |
| 102 #endif | |
| 103 | |
| 104 // we reset our locks if we get blown away | |
| 105 fPixelLockCount = 0; | |
| 106 | |
| 107 /* The src could be in 3 states | |
| 108 1. no pixelref, in which case we just copy/ref the pixels/ctable | |
| 109 2. unlocked pixelref, pixels/ctable should be null | |
| 110 3. locked pixelref, we should lock the ref again ourselves | |
| 111 */ | |
| 112 if (NULL == fPixelRef) { | |
| 113 // leave fPixels as it is | |
| 114 fColorTable->safeRef(); // ref the user's ctable if present | |
| 115 } else { // we have a pixelref, so pixels/ctable reflect it | |
| 116 // ignore the values from the memcpy | |
| 117 fPixels = NULL; | |
| 118 fColorTable = NULL; | |
| 119 } | |
| 120 } | |
| 121 | |
| 122 SkDEBUGCODE(this->validate();) | |
| 123 return *this; | |
| 124 } | |
| 125 | |
| 126 void SkBitmap::swap(SkBitmap& other) { | |
| 127 SkTSwap<SkColorTable*>(fColorTable, other.fColorTable); | |
| 128 SkTSwap<SkPixelRef*>(fPixelRef, other.fPixelRef); | |
| 129 SkTSwap<size_t>(fPixelRefOffset, other.fPixelRefOffset); | |
| 130 SkTSwap<int>(fPixelLockCount, other.fPixelLockCount); | |
| 131 #ifdef SK_SUPPORT_MIPMAP | |
| 132 SkTSwap<MipMap*>(fMipMap, other.fMipMap); | |
| 133 #endif | |
| 134 SkTSwap<void*>(fPixels, other.fPixels); | |
| 135 SkTSwap<uint16_t>(fWidth, other.fWidth); | |
| 136 SkTSwap<uint16_t>(fHeight, other.fHeight); | |
| 137 SkTSwap<uint32_t>(fRowBytes, other.fRowBytes); | |
| 138 SkTSwap<uint8_t>(fConfig, other.fConfig); | |
| 139 SkTSwap<uint8_t>(fFlags, other.fFlags); | |
| 140 SkTSwap<uint8_t>(fBytesPerPixel, other.fBytesPerPixel); | |
| 141 | |
| 142 SkDEBUGCODE(this->validate();) | |
| 143 } | |
| 144 | |
| 145 void SkBitmap::reset() { | |
| 146 this->freePixels(); | |
| 147 bzero(this, sizeof(*this)); | |
| 148 } | |
| 149 | |
| 150 int SkBitmap::ComputeBytesPerPixel(SkBitmap::Config config) { | |
| 151 int bpp; | |
| 152 switch (config) { | |
| 153 case kNo_Config: | |
| 154 case kA1_Config: | |
| 155 bpp = 0; // not applicable | |
| 156 break; | |
| 157 case kRLE_Index8_Config: | |
| 158 case kA8_Config: | |
| 159 case kIndex8_Config: | |
| 160 bpp = 1; | |
| 161 break; | |
| 162 case kRGB_565_Config: | |
| 163 case kARGB_4444_Config: | |
| 164 bpp = 2; | |
| 165 break; | |
| 166 case kARGB_8888_Config: | |
| 167 bpp = 4; | |
| 168 break; | |
| 169 default: | |
| 170 SkASSERT(!"unknown config"); | |
| 171 bpp = 0; // error | |
| 172 break; | |
| 173 } | |
| 174 return bpp; | |
| 175 } | |
| 176 | |
| 177 int SkBitmap::ComputeRowBytes(Config c, int width) { | |
| 178 int rowBytes = 0; | |
| 179 | |
| 180 switch (c) { | |
| 181 case kNo_Config: | |
| 182 case kRLE_Index8_Config: | |
| 183 // assume that the bitmap has no pixels to draw to | |
| 184 rowBytes = 0; | |
| 185 break; | |
| 186 case kA1_Config: | |
| 187 rowBytes = (width + 7) >> 3; | |
| 188 break; | |
| 189 case kA8_Config: | |
| 190 case kIndex8_Config: | |
| 191 rowBytes = width; | |
| 192 break; | |
| 193 case kRGB_565_Config: | |
| 194 case kARGB_4444_Config: | |
| 195 rowBytes = width << 1; | |
| 196 break; | |
| 197 case kARGB_8888_Config: | |
| 198 rowBytes = width << 2; | |
| 199 break; | |
| 200 default: | |
| 201 SkASSERT(!"unknown config"); | |
| 202 break; | |
| 203 } | |
| 204 return rowBytes; | |
| 205 } | |
| 206 | |
| 207 Sk64 SkBitmap::ComputeSize64(Config c, int width, int height) { | |
| 208 Sk64 size; | |
| 209 size.setMul(SkBitmap::ComputeRowBytes(c, width), height); | |
| 210 return size; | |
| 211 } | |
| 212 | |
| 213 size_t SkBitmap::ComputeSize(Config c, int width, int height) { | |
| 214 Sk64 size = SkBitmap::ComputeSize64(c, width, height); | |
| 215 if (size.isNeg() || !size.is32()) { | |
| 216 return 0; | |
| 217 } | |
| 218 return size.get32(); | |
| 219 } | |
| 220 | |
| 221 void SkBitmap::setConfig(Config c, int width, int height, int rowBytes) { | |
| 222 this->freePixels(); | |
| 223 | |
| 224 if (rowBytes == 0) { | |
| 225 rowBytes = SkBitmap::ComputeRowBytes(c, width); | |
| 226 } | |
| 227 fConfig = SkToU8(c); | |
| 228 fWidth = SkToU16(width); | |
| 229 fHeight = SkToU16(height); | |
| 230 fRowBytes = rowBytes; | |
| 231 | |
| 232 fBytesPerPixel = (uint8_t)ComputeBytesPerPixel(c); | |
| 233 | |
| 234 SkDEBUGCODE(this->validate();) | |
| 235 } | |
| 236 | |
| 237 void SkBitmap::updatePixelsFromRef() const { | |
| 238 if (NULL != fPixelRef) { | |
| 239 if (fPixelLockCount > 0) { | |
| 240 SkASSERT(fPixelRef->getLockCount() > 0); | |
| 241 | |
| 242 void* p = fPixelRef->pixels(); | |
| 243 if (NULL != p) { | |
| 244 p = (char*)p + fPixelRefOffset; | |
| 245 } | |
| 246 fPixels = p; | |
| 247 SkRefCnt_SafeAssign(fColorTable, fPixelRef->colorTable()); | |
| 248 } else { | |
| 249 SkASSERT(0 == fPixelLockCount); | |
| 250 fPixels = NULL; | |
| 251 fColorTable->safeUnref(); | |
| 252 fColorTable = NULL; | |
| 253 } | |
| 254 } | |
| 255 } | |
| 256 | |
| 257 SkPixelRef* SkBitmap::setPixelRef(SkPixelRef* pr, size_t offset) { | |
| 258 // do this first, we that we never have a non-zero offset with a null ref | |
| 259 if (NULL == pr) { | |
| 260 offset = 0; | |
| 261 } | |
| 262 | |
| 263 if (fPixelRef != pr || fPixelRefOffset != offset) { | |
| 264 if (fPixelRef != pr) { | |
| 265 this->freePixels(); | |
| 266 SkASSERT(NULL == fPixelRef); | |
| 267 | |
| 268 pr->safeRef(); | |
| 269 fPixelRef = pr; | |
| 270 } | |
| 271 fPixelRefOffset = offset; | |
| 272 this->updatePixelsFromRef(); | |
| 273 } | |
| 274 | |
| 275 SkDEBUGCODE(this->validate();) | |
| 276 return pr; | |
| 277 } | |
| 278 | |
| 279 void SkBitmap::lockPixels() const { | |
| 280 if (NULL != fPixelRef && 1 == ++fPixelLockCount) { | |
| 281 fPixelRef->lockPixels(); | |
| 282 this->updatePixelsFromRef(); | |
| 283 } | |
| 284 SkDEBUGCODE(this->validate();) | |
| 285 } | |
| 286 | |
| 287 void SkBitmap::unlockPixels() const { | |
| 288 SkASSERT(NULL == fPixelRef || fPixelLockCount > 0); | |
| 289 | |
| 290 if (NULL != fPixelRef && 0 == --fPixelLockCount) { | |
| 291 fPixelRef->unlockPixels(); | |
| 292 this->updatePixelsFromRef(); | |
| 293 } | |
| 294 SkDEBUGCODE(this->validate();) | |
| 295 } | |
| 296 | |
| 297 void SkBitmap::setPixels(void* p, SkColorTable* ctable) { | |
| 298 this->freePixels(); | |
| 299 fPixels = p; | |
| 300 SkRefCnt_SafeAssign(fColorTable, ctable); | |
| 301 | |
| 302 SkDEBUGCODE(this->validate();) | |
| 303 } | |
| 304 | |
| 305 bool SkBitmap::allocPixels(Allocator* allocator, SkColorTable* ctable) { | |
| 306 HeapAllocator stdalloc; | |
| 307 | |
| 308 if (NULL == allocator) { | |
| 309 allocator = &stdalloc; | |
| 310 } | |
| 311 return allocator->allocPixelRef(this, ctable); | |
| 312 } | |
| 313 | |
| 314 void SkBitmap::freePixels() { | |
| 315 // if we're gonna free the pixels, we certainly need to free the mipmap | |
| 316 this->freeMipMap(); | |
| 317 | |
| 318 fColorTable->safeUnref(); | |
| 319 fColorTable = NULL; | |
| 320 | |
| 321 if (NULL != fPixelRef) { | |
| 322 if (fPixelLockCount > 0) { | |
| 323 fPixelRef->unlockPixels(); | |
| 324 } | |
| 325 fPixelRef->unref(); | |
| 326 fPixelRef = NULL; | |
| 327 fPixelRefOffset = 0; | |
| 328 } | |
| 329 fPixelLockCount = 0; | |
| 330 fPixels = NULL; | |
| 331 } | |
| 332 | |
| 333 void SkBitmap::freeMipMap() { | |
| 334 #ifdef SK_SUPPORT_MIPMAP | |
| 335 fMipMap->safeUnref(); | |
| 336 fMipMap = NULL; | |
| 337 #endif | |
| 338 } | |
| 339 | |
| 340 uint32_t SkBitmap::getGenerationID() const { | |
| 341 return fPixelRef ? fPixelRef->getGenerationID() : 0; | |
| 342 } | |
| 343 | |
| 344 void SkBitmap::notifyPixelsChanged() const { | |
| 345 if (fPixelRef) { | |
| 346 fPixelRef->notifyPixelsChanged(); | |
| 347 } | |
| 348 } | |
| 349 | |
| 350 /////////////////////////////////////////////////////////////////////////////// | |
| 351 | |
| 352 SkMallocPixelRef::SkMallocPixelRef(void* storage, size_t size, | |
| 353 SkColorTable* ctable) { | |
| 354 SkASSERT(storage); | |
| 355 fStorage = storage; | |
| 356 fSize = size; | |
| 357 fCTable = ctable; | |
| 358 ctable->safeRef(); | |
| 359 } | |
| 360 | |
| 361 SkMallocPixelRef::~SkMallocPixelRef() { | |
| 362 fCTable->safeUnref(); | |
| 363 sk_free(fStorage); | |
| 364 } | |
| 365 | |
| 366 void* SkMallocPixelRef::onLockPixels(SkColorTable** ct) { | |
| 367 *ct = fCTable; | |
| 368 return fStorage; | |
| 369 } | |
| 370 | |
| 371 void SkMallocPixelRef::onUnlockPixels() { | |
| 372 // nothing to do | |
| 373 } | |
| 374 | |
| 375 void SkMallocPixelRef::flatten(SkFlattenableWriteBuffer& buffer) const { | |
| 376 this->INHERITED::flatten(buffer); | |
| 377 | |
| 378 buffer.write32(fSize); | |
| 379 buffer.writePad(fStorage, fSize); | |
| 380 if (fCTable) { | |
| 381 buffer.writeBool(true); | |
| 382 fCTable->flatten(buffer); | |
| 383 } else { | |
| 384 buffer.writeBool(false); | |
| 385 } | |
| 386 } | |
| 387 | |
| 388 SkMallocPixelRef::SkMallocPixelRef(SkFlattenableReadBuffer& buffer) : INHERITED(
buffer, NULL) { | |
| 389 fSize = buffer.readU32(); | |
| 390 fStorage = sk_malloc_throw(fSize); | |
| 391 buffer.read(fStorage, fSize); | |
| 392 if (buffer.readBool()) { | |
| 393 fCTable = SkNEW_ARGS(SkColorTable, (buffer)); | |
| 394 } else { | |
| 395 fCTable = NULL; | |
| 396 } | |
| 397 } | |
| 398 | |
| 399 static SkPixelRef::Registrar reg("SkMallocPixelRef", | |
| 400 SkMallocPixelRef::Create); | |
| 401 | |
| 402 /** We explicitly use the same allocator for our pixels that SkMask does, | |
| 403 so that we can freely assign memory allocated by one class to the other. | |
| 404 */ | |
| 405 bool SkBitmap::HeapAllocator::allocPixelRef(SkBitmap* dst, | |
| 406 SkColorTable* ctable) { | |
| 407 Sk64 size = dst->getSize64(); | |
| 408 if (size.isNeg() || !size.is32()) { | |
| 409 return false; | |
| 410 } | |
| 411 | |
| 412 void* addr = sk_malloc_flags(size.get32(), 0); // returns NULL on failure | |
| 413 if (NULL == addr) { | |
| 414 return false; | |
| 415 } | |
| 416 | |
| 417 dst->setPixelRef(new SkMallocPixelRef(addr, size.get32(), ctable))->unref(); | |
| 418 // since we're already allocated, we lockPixels right away | |
| 419 dst->lockPixels(); | |
| 420 return true; | |
| 421 } | |
| 422 | |
| 423 /////////////////////////////////////////////////////////////////////////////// | |
| 424 | |
| 425 bool SkBitmap::isOpaque() const { | |
| 426 switch (fConfig) { | |
| 427 case kNo_Config: | |
| 428 return true; | |
| 429 | |
| 430 case kA1_Config: | |
| 431 case kA8_Config: | |
| 432 case kARGB_4444_Config: | |
| 433 case kARGB_8888_Config: | |
| 434 return (fFlags & kImageIsOpaque_Flag) != 0; | |
| 435 | |
| 436 case kIndex8_Config: | |
| 437 case kRLE_Index8_Config: { | |
| 438 uint32_t flags = 0; | |
| 439 | |
| 440 this->lockPixels(); | |
| 441 // if lockPixels failed, we may not have a ctable ptr | |
| 442 if (fColorTable) { | |
| 443 flags = fColorTable->getFlags(); | |
| 444 } | |
| 445 this->unlockPixels(); | |
| 446 | |
| 447 return (flags & SkColorTable::kColorsAreOpaque_Flag) != 0; | |
| 448 } | |
| 449 | |
| 450 case kRGB_565_Config: | |
| 451 return true; | |
| 452 | |
| 453 default: | |
| 454 SkASSERT(!"unknown bitmap config pased to isOpaque"); | |
| 455 return false; | |
| 456 } | |
| 457 } | |
| 458 | |
| 459 void SkBitmap::setIsOpaque(bool isOpaque) { | |
| 460 /* we record this regardless of fConfig, though it is ignored in | |
| 461 isOpaque() for configs that can't support per-pixel alpha. | |
| 462 */ | |
| 463 if (isOpaque) { | |
| 464 fFlags |= kImageIsOpaque_Flag; | |
| 465 } else { | |
| 466 fFlags &= ~kImageIsOpaque_Flag; | |
| 467 } | |
| 468 } | |
| 469 | |
| 470 void* SkBitmap::getAddr(int x, int y) const { | |
| 471 SkASSERT((unsigned)x < (unsigned)this->width()); | |
| 472 SkASSERT((unsigned)y < (unsigned)this->height()); | |
| 473 | |
| 474 char* base = (char*)this->getPixels(); | |
| 475 if (base) { | |
| 476 base += y * this->rowBytes(); | |
| 477 switch (this->config()) { | |
| 478 case SkBitmap::kARGB_8888_Config: | |
| 479 base += x << 2; | |
| 480 break; | |
| 481 case SkBitmap::kARGB_4444_Config: | |
| 482 case SkBitmap::kRGB_565_Config: | |
| 483 base += x << 1; | |
| 484 break; | |
| 485 case SkBitmap::kA8_Config: | |
| 486 case SkBitmap::kIndex8_Config: | |
| 487 base += x; | |
| 488 break; | |
| 489 case SkBitmap::kA1_Config: | |
| 490 base += x >> 3; | |
| 491 break; | |
| 492 case kRLE_Index8_Config: | |
| 493 SkASSERT(!"Can't return addr for kRLE_Index8_Config"); | |
| 494 base = NULL; | |
| 495 break; | |
| 496 default: | |
| 497 SkASSERT(!"Can't return addr for config"); | |
| 498 base = NULL; | |
| 499 break; | |
| 500 } | |
| 501 } | |
| 502 return base; | |
| 503 } | |
| 504 | |
| 505 /////////////////////////////////////////////////////////////////////////////// | |
| 506 /////////////////////////////////////////////////////////////////////////////// | |
| 507 | |
| 508 void SkBitmap::eraseARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b) const { | |
| 509 SkDEBUGCODE(this->validate();) | |
| 510 | |
| 511 if (0 == fWidth || 0 == fHeight || | |
| 512 kNo_Config == fConfig || kIndex8_Config == fConfig) { | |
| 513 return; | |
| 514 } | |
| 515 | |
| 516 SkAutoLockPixels alp(*this); | |
| 517 // perform this check after the lock call | |
| 518 if (!this->readyToDraw()) { | |
| 519 return; | |
| 520 } | |
| 521 | |
| 522 int height = fHeight; | |
| 523 const int width = fWidth; | |
| 524 const int rowBytes = fRowBytes; | |
| 525 | |
| 526 // make rgb premultiplied | |
| 527 if (255 != a) { | |
| 528 r = SkAlphaMul(r, a); | |
| 529 g = SkAlphaMul(g, a); | |
| 530 b = SkAlphaMul(b, a); | |
| 531 } | |
| 532 | |
| 533 switch (fConfig) { | |
| 534 case kA1_Config: { | |
| 535 uint8_t* p = (uint8_t*)fPixels; | |
| 536 const int count = (width + 7) >> 3; | |
| 537 a = (a >> 7) ? 0xFF : 0; | |
| 538 SkASSERT(count <= rowBytes); | |
| 539 while (--height >= 0) { | |
| 540 memset(p, a, count); | |
| 541 p += rowBytes; | |
| 542 } | |
| 543 break; | |
| 544 } | |
| 545 case kA8_Config: { | |
| 546 uint8_t* p = (uint8_t*)fPixels; | |
| 547 while (--height >= 0) { | |
| 548 memset(p, a, width); | |
| 549 p += rowBytes; | |
| 550 } | |
| 551 break; | |
| 552 } | |
| 553 case kARGB_4444_Config: | |
| 554 case kRGB_565_Config: { | |
| 555 uint16_t* p = (uint16_t*)fPixels; | |
| 556 uint16_t v; | |
| 557 | |
| 558 if (kARGB_4444_Config == fConfig) { | |
| 559 v = SkPackARGB4444(a >> 4, r >> 4, g >> 4, b >> 4); | |
| 560 } else { // kRGB_565_Config | |
| 561 v = SkPackRGB16(r >> (8 - SK_R16_BITS), g >> (8 - SK_G16_BITS), | |
| 562 b >> (8 - SK_B16_BITS)); | |
| 563 } | |
| 564 while (--height >= 0) { | |
| 565 sk_memset16(p, v, width); | |
| 566 p = (uint16_t*)((char*)p + rowBytes); | |
| 567 } | |
| 568 break; | |
| 569 } | |
| 570 case kARGB_8888_Config: { | |
| 571 uint32_t* p = (uint32_t*)fPixels; | |
| 572 uint32_t v = SkPackARGB32(a, r, g, b); | |
| 573 | |
| 574 while (--height >= 0) { | |
| 575 sk_memset32(p, v, width); | |
| 576 p = (uint32_t*)((char*)p + rowBytes); | |
| 577 } | |
| 578 break; | |
| 579 } | |
| 580 } | |
| 581 | |
| 582 this->notifyPixelsChanged(); | |
| 583 } | |
| 584 | |
| 585 ////////////////////////////////////////////////////////////////////////////////
////// | |
| 586 ////////////////////////////////////////////////////////////////////////////////
////// | |
| 587 | |
| 588 #define SUB_OFFSET_FAILURE ((size_t)-1) | |
| 589 | |
| 590 static size_t getSubOffset(const SkBitmap& bm, int x, int y) { | |
| 591 SkASSERT((unsigned)x < (unsigned)bm.width()); | |
| 592 SkASSERT((unsigned)y < (unsigned)bm.height()); | |
| 593 | |
| 594 switch (bm.getConfig()) { | |
| 595 case SkBitmap::kA8_Config: | |
| 596 case SkBitmap:: kIndex8_Config: | |
| 597 // x is fine as is for the calculation | |
| 598 break; | |
| 599 | |
| 600 case SkBitmap::kRGB_565_Config: | |
| 601 case SkBitmap::kARGB_4444_Config: | |
| 602 x <<= 1; | |
| 603 break; | |
| 604 | |
| 605 case SkBitmap::kARGB_8888_Config: | |
| 606 x <<= 2; | |
| 607 break; | |
| 608 | |
| 609 case SkBitmap::kNo_Config: | |
| 610 case SkBitmap::kA1_Config: | |
| 611 default: | |
| 612 return SUB_OFFSET_FAILURE; | |
| 613 } | |
| 614 return y * bm.rowBytes() + x; | |
| 615 } | |
| 616 | |
| 617 bool SkBitmap::extractSubset(SkBitmap* result, const SkIRect& subset) const { | |
| 618 SkDEBUGCODE(this->validate();) | |
| 619 | |
| 620 if (NULL == result || (NULL == fPixelRef && NULL == fPixels)) { | |
| 621 return false; // no src pixels | |
| 622 } | |
| 623 | |
| 624 SkIRect srcRect, r; | |
| 625 srcRect.set(0, 0, this->width(), this->height()); | |
| 626 if (!r.intersect(srcRect, subset)) { | |
| 627 return false; // r is empty (i.e. no intersection) | |
| 628 } | |
| 629 | |
| 630 if (kRLE_Index8_Config == fConfig) { | |
| 631 SkAutoLockPixels alp(*this); | |
| 632 // don't call readyToDraw(), since we can operate w/o a colortable | |
| 633 // at this stage | |
| 634 if (this->getPixels() == NULL) { | |
| 635 return false; | |
| 636 } | |
| 637 SkBitmap bm; | |
| 638 | |
| 639 bm.setConfig(kIndex8_Config, r.width(), r.height()); | |
| 640 bm.allocPixels(this->getColorTable()); | |
| 641 if (NULL == bm.getPixels()) { | |
| 642 return false; | |
| 643 } | |
| 644 | |
| 645 const RLEPixels* rle = (const RLEPixels*)this->getPixels(); | |
| 646 uint8_t* dst = bm.getAddr8(0, 0); | |
| 647 const int width = bm.width(); | |
| 648 const int rowBytes = bm.rowBytes(); | |
| 649 | |
| 650 for (int y = r.fTop; y < r.fBottom; y++) { | |
| 651 SkPackBits::Unpack8(dst, r.fLeft, width, rle->packedAtY(y)); | |
| 652 dst += rowBytes; | |
| 653 } | |
| 654 result->swap(bm); | |
| 655 return true; | |
| 656 } | |
| 657 | |
| 658 size_t offset = getSubOffset(*this, r.fLeft, r.fTop); | |
| 659 if (SUB_OFFSET_FAILURE == offset) { | |
| 660 return false; // config not supported | |
| 661 } | |
| 662 | |
| 663 SkBitmap dst; | |
| 664 dst.setConfig(this->config(), r.width(), r.height(), this->rowBytes()); | |
| 665 | |
| 666 if (fPixelRef) { | |
| 667 // share the pixelref with a custom offset | |
| 668 dst.setPixelRef(fPixelRef, fPixelRefOffset + offset); | |
| 669 } else { | |
| 670 // share the pixels (owned by the caller) | |
| 671 dst.setPixels((char*)fPixels + offset, this->getColorTable()); | |
| 672 } | |
| 673 SkDEBUGCODE(dst.validate();) | |
| 674 | |
| 675 // we know we're good, so commit to result | |
| 676 result->swap(dst); | |
| 677 return true; | |
| 678 } | |
| 679 | |
| 680 /////////////////////////////////////////////////////////////////////////////// | |
| 681 | |
| 682 #include "SkCanvas.h" | |
| 683 #include "SkPaint.h" | |
| 684 | |
| 685 bool SkBitmap::copyTo(SkBitmap* dst, Config dstConfig, Allocator* alloc) const { | |
| 686 if (NULL == dst || this->width() == 0 || this->height() == 0) { | |
| 687 return false; | |
| 688 } | |
| 689 | |
| 690 switch (dstConfig) { | |
| 691 case kA8_Config: | |
| 692 case kARGB_4444_Config: | |
| 693 case kRGB_565_Config: | |
| 694 case kARGB_8888_Config: | |
| 695 break; | |
| 696 default: | |
| 697 return false; | |
| 698 } | |
| 699 | |
| 700 SkBitmap tmp; | |
| 701 | |
| 702 tmp.setConfig(dstConfig, this->width(), this->height()); | |
| 703 // pass null for colortable, since we don't support Index8 config for dst | |
| 704 if (!tmp.allocPixels(alloc, NULL)) { | |
| 705 return false; | |
| 706 } | |
| 707 | |
| 708 SkAutoLockPixels srclock(*this); | |
| 709 SkAutoLockPixels dstlock(tmp); | |
| 710 | |
| 711 if (!this->readyToDraw() || !tmp.readyToDraw()) { | |
| 712 // allocator/lock failed | |
| 713 return false; | |
| 714 } | |
| 715 | |
| 716 // if the src has alpha, we have to clear the dst first | |
| 717 if (!this->isOpaque()) { | |
| 718 tmp.eraseColor(0); | |
| 719 } | |
| 720 | |
| 721 SkCanvas canvas(tmp); | |
| 722 SkPaint paint; | |
| 723 | |
| 724 paint.setDither(true); | |
| 725 canvas.drawBitmap(*this, 0, 0, &paint); | |
| 726 | |
| 727 dst->swap(tmp); | |
| 728 return true; | |
| 729 } | |
| 730 | |
| 731 /////////////////////////////////////////////////////////////////////////////// | |
| 732 /////////////////////////////////////////////////////////////////////////////// | |
| 733 | |
| 734 static void downsampleby2_proc32(SkBitmap* dst, int x, int y, | |
| 735 const SkBitmap& src) { | |
| 736 x <<= 1; | |
| 737 y <<= 1; | |
| 738 const SkPMColor* p = src.getAddr32(x, y); | |
| 739 SkPMColor c, ag, rb; | |
| 740 | |
| 741 c = *p; ag = (c >> 8) & 0xFF00FF; rb = c & 0xFF00FF; | |
| 742 if (x < src.width() - 1) { | |
| 743 p += 1; | |
| 744 } | |
| 745 c = *p; ag += (c >> 8) & 0xFF00FF; rb += c & 0xFF00FF; | |
| 746 | |
| 747 if (y < src.height() - 1) { | |
| 748 p = src.getAddr32(x, y + 1); | |
| 749 } | |
| 750 c = *p; ag += (c >> 8) & 0xFF00FF; rb += c & 0xFF00FF; | |
| 751 if (x < src.width() - 1) { | |
| 752 p += 1; | |
| 753 } | |
| 754 c = *p; ag += (c >> 8) & 0xFF00FF; rb += c & 0xFF00FF; | |
| 755 | |
| 756 *dst->getAddr32(x >> 1, y >> 1) = | |
| 757 ((rb >> 2) & 0xFF00FF) | ((ag << 6) & 0xFF00FF00); | |
| 758 } | |
| 759 | |
| 760 static inline uint32_t expand16(U16CPU c) { | |
| 761 return (c & ~SK_G16_MASK_IN_PLACE) | ((c & SK_G16_MASK_IN_PLACE) << 16); | |
| 762 } | |
| 763 | |
| 764 // returns dirt in the top 16bits, but we don't care, since we only | |
| 765 // store the low 16bits. | |
| 766 static inline U16CPU pack16(uint32_t c) { | |
| 767 return (c & ~SK_G16_MASK_IN_PLACE) | ((c >> 16) & SK_G16_MASK_IN_PLACE); | |
| 768 } | |
| 769 | |
| 770 static void downsampleby2_proc16(SkBitmap* dst, int x, int y, | |
| 771 const SkBitmap& src) { | |
| 772 x <<= 1; | |
| 773 y <<= 1; | |
| 774 const uint16_t* p = src.getAddr16(x, y); | |
| 775 SkPMColor c; | |
| 776 | |
| 777 c = expand16(*p); | |
| 778 if (x < (int)src.width() - 1) { | |
| 779 p += 1; | |
| 780 } | |
| 781 c += expand16(*p); | |
| 782 | |
| 783 if (y < (int)src.height() - 1) { | |
| 784 p = src.getAddr16(x, y + 1); | |
| 785 } | |
| 786 c += expand16(*p); | |
| 787 if (x < (int)src.width() - 1) { | |
| 788 p += 1; | |
| 789 } | |
| 790 c += expand16(*p); | |
| 791 | |
| 792 *dst->getAddr16(x >> 1, y >> 1) = (uint16_t)pack16(c >> 2); | |
| 793 } | |
| 794 | |
| 795 static uint32_t expand4444(U16CPU c) { | |
| 796 return (c & 0xF0F) | ((c & ~0xF0F) << 12); | |
| 797 } | |
| 798 | |
| 799 static U16CPU collaps4444(uint32_t c) { | |
| 800 return (c & 0xF0F) | ((c >> 12) & ~0xF0F); | |
| 801 } | |
| 802 | |
| 803 static void downsampleby2_proc4444(SkBitmap* dst, int x, int y, | |
| 804 const SkBitmap& src) { | |
| 805 x <<= 1; | |
| 806 y <<= 1; | |
| 807 const uint16_t* p = src.getAddr16(x, y); | |
| 808 uint32_t c; | |
| 809 | |
| 810 c = expand4444(*p); | |
| 811 if (x < src.width() - 1) { | |
| 812 p += 1; | |
| 813 } | |
| 814 c += expand4444(*p); | |
| 815 | |
| 816 if (y < src.height() - 1) { | |
| 817 p = src.getAddr16(x, y + 1); | |
| 818 } | |
| 819 c += expand4444(*p); | |
| 820 if (x < src.width() - 1) { | |
| 821 p += 1; | |
| 822 } | |
| 823 c += expand4444(*p); | |
| 824 | |
| 825 *dst->getAddr16(x >> 1, y >> 1) = (uint16_t)collaps4444(c >> 2); | |
| 826 } | |
| 827 | |
| 828 void SkBitmap::buildMipMap(bool forceRebuild) { | |
| 829 #ifdef SK_SUPPORT_MIPMAP | |
| 830 if (forceRebuild) | |
| 831 this->freeMipMap(); | |
| 832 else if (fMipMap) | |
| 833 return; // we're already built | |
| 834 | |
| 835 SkASSERT(NULL == fMipMap); | |
| 836 | |
| 837 void (*proc)(SkBitmap* dst, int x, int y, const SkBitmap& src); | |
| 838 | |
| 839 const SkBitmap::Config config = this->getConfig(); | |
| 840 | |
| 841 switch (config) { | |
| 842 case kARGB_8888_Config: | |
| 843 proc = downsampleby2_proc32; | |
| 844 break; | |
| 845 case kRGB_565_Config: | |
| 846 proc = downsampleby2_proc16; | |
| 847 break; | |
| 848 case kARGB_4444_Config: | |
| 849 proc = downsampleby2_proc4444; | |
| 850 break; | |
| 851 case kIndex8_Config: | |
| 852 case kA8_Config: | |
| 853 default: | |
| 854 return; // don't build mipmaps for these configs | |
| 855 } | |
| 856 | |
| 857 // whip through our loop to compute the exact size needed | |
| 858 size_t size = 0; | |
| 859 int maxLevels = 0; | |
| 860 { | |
| 861 unsigned width = this->width(); | |
| 862 unsigned height = this->height(); | |
| 863 for (;;) { | |
| 864 width >>= 1; | |
| 865 height >>= 1; | |
| 866 if (0 == width || 0 == height) { | |
| 867 break; | |
| 868 } | |
| 869 size += ComputeRowBytes(config, width) * height; | |
| 870 maxLevels += 1; | |
| 871 } | |
| 872 } | |
| 873 if (0 == maxLevels) { | |
| 874 return; | |
| 875 } | |
| 876 | |
| 877 MipMap* mm = MipMap::Alloc(maxLevels, size); | |
| 878 MipLevel* level = mm->levels(); | |
| 879 uint8_t* addr = (uint8_t*)mm->pixels(); | |
| 880 | |
| 881 unsigned width = this->width(); | |
| 882 unsigned height = this->height(); | |
| 883 unsigned rowBytes = this->rowBytes(); | |
| 884 SkBitmap srcBM(*this), dstBM; | |
| 885 | |
| 886 srcBM.lockPixels(); | |
| 887 | |
| 888 for (int i = 0; i < maxLevels; i++) { | |
| 889 width >>= 1; | |
| 890 height >>= 1; | |
| 891 rowBytes = ComputeRowBytes(config, width); | |
| 892 | |
| 893 level[i].fPixels = addr; | |
| 894 level[i].fWidth = SkToU16(width); | |
| 895 level[i].fHeight = SkToU16(height); | |
| 896 level[i].fRowBytes = SkToU16(rowBytes); | |
| 897 | |
| 898 dstBM.setConfig(config, width, height, rowBytes); | |
| 899 dstBM.setPixels(addr); | |
| 900 | |
| 901 for (unsigned y = 0; y < height; y++) { | |
| 902 for (unsigned x = 0; x < width; x++) { | |
| 903 proc(&dstBM, x, y, srcBM); | |
| 904 } | |
| 905 } | |
| 906 | |
| 907 srcBM = dstBM; | |
| 908 addr += height * rowBytes; | |
| 909 } | |
| 910 SkASSERT(addr == (uint8_t*)mm->pixels() + size); | |
| 911 fMipMap = mm; | |
| 912 #endif | |
| 913 } | |
| 914 | |
| 915 bool SkBitmap::hasMipMap() const { | |
| 916 #ifdef SK_SUPPORT_MIPMAP | |
| 917 return fMipMap != NULL; | |
| 918 #else | |
| 919 return false; | |
| 920 #endif | |
| 921 } | |
| 922 | |
| 923 int SkBitmap::extractMipLevel(SkBitmap* dst, SkFixed sx, SkFixed sy) { | |
| 924 #ifdef SK_SUPPORT_MIPMAP | |
| 925 if (NULL == fMipMap) | |
| 926 return 0; | |
| 927 | |
| 928 int level = ComputeMipLevel(sx, sy) >> 16; | |
| 929 SkASSERT(level >= 0); | |
| 930 if (level <= 0) { | |
| 931 return 0; | |
| 932 } | |
| 933 | |
| 934 if (level >= fMipMap->fLevelCount) { | |
| 935 level = fMipMap->fLevelCount - 1; | |
| 936 } | |
| 937 if (dst) { | |
| 938 const MipLevel& mip = fMipMap->levels()[level - 1]; | |
| 939 dst->setConfig((SkBitmap::Config)this->config(), | |
| 940 mip.fWidth, mip.fHeight, mip.fRowBytes); | |
| 941 dst->setPixels(mip.fPixels); | |
| 942 } | |
| 943 return level; | |
| 944 #else | |
| 945 return 0; | |
| 946 #endif | |
| 947 } | |
| 948 | |
| 949 SkFixed SkBitmap::ComputeMipLevel(SkFixed sx, SkFixed sy) { | |
| 950 #ifdef SK_SUPPORT_MIPMAP | |
| 951 sx = SkAbs32(sx); | |
| 952 sy = SkAbs32(sy); | |
| 953 if (sx < sy) { | |
| 954 sx = sy; | |
| 955 } | |
| 956 if (sx < SK_Fixed1) { | |
| 957 return 0; | |
| 958 } | |
| 959 int clz = SkCLZ(sx); | |
| 960 SkASSERT(clz >= 1 && clz <= 15); | |
| 961 return SkIntToFixed(15 - clz) + ((unsigned)(sx << (clz + 1)) >> 16); | |
| 962 #else | |
| 963 return 0; | |
| 964 #endif | |
| 965 } | |
| 966 | |
| 967 /////////////////////////////////////////////////////////////////////////////// | |
| 968 | |
| 969 static void GetBitmapAlpha(const SkBitmap& src, uint8_t SK_RESTRICT alpha[], | |
| 970 int alphaRowBytes) { | |
| 971 SkASSERT(alpha != NULL); | |
| 972 SkASSERT(alphaRowBytes >= src.width()); | |
| 973 | |
| 974 SkBitmap::Config config = src.getConfig(); | |
| 975 int w = src.width(); | |
| 976 int h = src.height(); | |
| 977 int rb = src.rowBytes(); | |
| 978 | |
| 979 if (SkBitmap::kA8_Config == config && !src.isOpaque()) { | |
| 980 const uint8_t* s = src.getAddr8(0, 0); | |
| 981 while (--h >= 0) { | |
| 982 memcpy(alpha, s, w); | |
| 983 s += rb; | |
| 984 alpha += alphaRowBytes; | |
| 985 } | |
| 986 } else if (SkBitmap::kARGB_8888_Config == config && !src.isOpaque()) { | |
| 987 const SkPMColor* SK_RESTRICT s = src.getAddr32(0, 0); | |
| 988 while (--h >= 0) { | |
| 989 for (int x = 0; x < w; x++) { | |
| 990 alpha[x] = SkGetPackedA32(s[x]); | |
| 991 } | |
| 992 s = (const SkPMColor*)((const char*)s + rb); | |
| 993 alpha += alphaRowBytes; | |
| 994 } | |
| 995 } else if (SkBitmap::kARGB_4444_Config == config && !src.isOpaque()) { | |
| 996 const SkPMColor16* SK_RESTRICT s = src.getAddr16(0, 0); | |
| 997 while (--h >= 0) { | |
| 998 for (int x = 0; x < w; x++) { | |
| 999 alpha[x] = SkPacked4444ToA32(s[x]); | |
| 1000 } | |
| 1001 s = (const SkPMColor16*)((const char*)s + rb); | |
| 1002 alpha += alphaRowBytes; | |
| 1003 } | |
| 1004 } else if (SkBitmap::kIndex8_Config == config && !src.isOpaque()) { | |
| 1005 SkColorTable* ct = src.getColorTable(); | |
| 1006 if (ct) { | |
| 1007 const SkPMColor* SK_RESTRICT table = ct->lockColors(); | |
| 1008 const uint8_t* SK_RESTRICT s = src.getAddr8(0, 0); | |
| 1009 while (--h >= 0) { | |
| 1010 for (int x = 0; x < w; x++) { | |
| 1011 alpha[x] = SkGetPackedA32(table[s[x]]); | |
| 1012 } | |
| 1013 s += rb; | |
| 1014 alpha += alphaRowBytes; | |
| 1015 } | |
| 1016 ct->unlockColors(false); | |
| 1017 } | |
| 1018 } else { // src is opaque, so just fill alpha[] with 0xFF | |
| 1019 memset(alpha, 0xFF, h * alphaRowBytes); | |
| 1020 } | |
| 1021 } | |
| 1022 | |
| 1023 #include "SkPaint.h" | |
| 1024 #include "SkMaskFilter.h" | |
| 1025 #include "SkMatrix.h" | |
| 1026 | |
| 1027 void SkBitmap::extractAlpha(SkBitmap* dst, const SkPaint* paint, | |
| 1028 SkIPoint* offset) const { | |
| 1029 SkDEBUGCODE(this->validate();) | |
| 1030 | |
| 1031 SkMatrix identity; | |
| 1032 SkMask srcM, dstM; | |
| 1033 | |
| 1034 srcM.fBounds.set(0, 0, this->width(), this->height()); | |
| 1035 srcM.fRowBytes = SkAlign4(this->width()); | |
| 1036 srcM.fFormat = SkMask::kA8_Format; | |
| 1037 | |
| 1038 SkMaskFilter* filter = paint ? paint->getMaskFilter() : NULL; | |
| 1039 | |
| 1040 // compute our (larger?) dst bounds if we have a filter | |
| 1041 if (NULL != filter) { | |
| 1042 identity.reset(); | |
| 1043 srcM.fImage = NULL; | |
| 1044 if (!filter->filterMask(&dstM, srcM, identity, NULL)) { | |
| 1045 goto NO_FILTER_CASE; | |
| 1046 } | |
| 1047 dstM.fRowBytes = SkAlign4(dstM.fBounds.width()); | |
| 1048 } else { | |
| 1049 NO_FILTER_CASE: | |
| 1050 dst->setConfig(SkBitmap::kA8_Config, this->width(), this->height(), | |
| 1051 srcM.fRowBytes); | |
| 1052 dst->allocPixels(); | |
| 1053 GetBitmapAlpha(*this, dst->getAddr8(0, 0), srcM.fRowBytes); | |
| 1054 if (offset) { | |
| 1055 offset->set(0, 0); | |
| 1056 } | |
| 1057 return; | |
| 1058 } | |
| 1059 | |
| 1060 SkAutoMaskImage srcCleanup(&srcM, true); | |
| 1061 | |
| 1062 GetBitmapAlpha(*this, srcM.fImage, srcM.fRowBytes); | |
| 1063 if (!filter->filterMask(&dstM, srcM, identity, NULL)) { | |
| 1064 goto NO_FILTER_CASE; | |
| 1065 } | |
| 1066 | |
| 1067 SkAutoMaskImage dstCleanup(&dstM, false); | |
| 1068 | |
| 1069 dst->setConfig(SkBitmap::kA8_Config, dstM.fBounds.width(), | |
| 1070 dstM.fBounds.height(), dstM.fRowBytes); | |
| 1071 dst->allocPixels(); | |
| 1072 memcpy(dst->getPixels(), dstM.fImage, dstM.computeImageSize()); | |
| 1073 if (offset) { | |
| 1074 offset->set(dstM.fBounds.fLeft, dstM.fBounds.fTop); | |
| 1075 } | |
| 1076 SkDEBUGCODE(dst->validate();) | |
| 1077 } | |
| 1078 | |
| 1079 /////////////////////////////////////////////////////////////////////////////// | |
| 1080 | |
| 1081 enum { | |
| 1082 SERIALIZE_PIXELTYPE_NONE, | |
| 1083 SERIALIZE_PIXELTYPE_RAW_WITH_CTABLE, | |
| 1084 SERIALIZE_PIXELTYPE_RAW_NO_CTABLE, | |
| 1085 SERIALIZE_PIXELTYPE_REF_DATA, | |
| 1086 SERIALIZE_PIXELTYPE_REF_PTR, | |
| 1087 }; | |
| 1088 | |
| 1089 static void writeString(SkFlattenableWriteBuffer& buffer, const char str[]) { | |
| 1090 size_t len = strlen(str); | |
| 1091 buffer.write32(len); | |
| 1092 buffer.writePad(str, len); | |
| 1093 } | |
| 1094 | |
| 1095 static SkPixelRef::Factory deserialize_factory(SkFlattenableReadBuffer& buffer)
{ | |
| 1096 size_t len = buffer.readInt(); | |
| 1097 SkAutoSMalloc<256> storage(len + 1); | |
| 1098 char* str = (char*)storage.get(); | |
| 1099 buffer.read(str, len); | |
| 1100 str[len] = 0; | |
| 1101 return SkPixelRef::NameToFactory(str); | |
| 1102 } | |
| 1103 | |
| 1104 /* | |
| 1105 It is tricky to know how much to flatten. If we don't have a pixelref (i.e. | |
| 1106 we just have pixels, then we can only flatten the pixels, or write out an | |
| 1107 empty bitmap. | |
| 1108 | |
| 1109 With a pixelref, we still have the question of recognizing when two sitings | |
| 1110 of the same pixelref are the same, and when they are different. Perhaps we | |
| 1111 should look at the generationID and keep a record of that in some dictionary | |
| 1112 associated with the buffer. SkGLTextureCache does this sort of thing to know | |
| 1113 when to create a new texture. | |
| 1114 */ | |
| 1115 void SkBitmap::flatten(SkFlattenableWriteBuffer& buffer) const { | |
| 1116 buffer.write32(fWidth); | |
| 1117 buffer.write32(fHeight); | |
| 1118 buffer.write32(fRowBytes); | |
| 1119 buffer.write8(fConfig); | |
| 1120 buffer.writeBool(this->isOpaque()); | |
| 1121 | |
| 1122 /* If we are called in this mode, then it is up to the caller to manage | |
| 1123 the owner-counts on the pixelref, as we just record the ptr itself. | |
| 1124 */ | |
| 1125 if (!buffer.persistBitmapPixels()) { | |
| 1126 if (fPixelRef) { | |
| 1127 buffer.write8(SERIALIZE_PIXELTYPE_REF_PTR); | |
| 1128 buffer.write32(fPixelRefOffset); | |
| 1129 buffer.writeRefCnt(fPixelRef); | |
| 1130 return; | |
| 1131 } else { | |
| 1132 // we ignore the non-persist request, since we don't have a ref | |
| 1133 // ... or we could just write an empty bitmap... | |
| 1134 // (true) will write an empty bitmap, (false) will flatten the pix | |
| 1135 if (true) { | |
| 1136 buffer.write8(SERIALIZE_PIXELTYPE_NONE); | |
| 1137 return; | |
| 1138 } | |
| 1139 } | |
| 1140 } | |
| 1141 | |
| 1142 if (fPixelRef) { | |
| 1143 SkPixelRef::Factory fact = fPixelRef->getFactory(); | |
| 1144 if (fact) { | |
| 1145 const char* name = SkPixelRef::FactoryToName(fact); | |
| 1146 if (name && *name) { | |
| 1147 buffer.write8(SERIALIZE_PIXELTYPE_REF_DATA); | |
| 1148 buffer.write32(fPixelRefOffset); | |
| 1149 writeString(buffer, name); | |
| 1150 fPixelRef->flatten(buffer); | |
| 1151 return; | |
| 1152 } | |
| 1153 } | |
| 1154 // if we get here, we can't record the pixels | |
| 1155 buffer.write8(SERIALIZE_PIXELTYPE_NONE); | |
| 1156 } else if (fPixels) { | |
| 1157 if (fColorTable) { | |
| 1158 buffer.write8(SERIALIZE_PIXELTYPE_RAW_WITH_CTABLE); | |
| 1159 fColorTable->flatten(buffer); | |
| 1160 } else { | |
| 1161 buffer.write8(SERIALIZE_PIXELTYPE_RAW_NO_CTABLE); | |
| 1162 } | |
| 1163 buffer.writePad(fPixels, this->getSize()); | |
| 1164 } else { | |
| 1165 buffer.write8(SERIALIZE_PIXELTYPE_NONE); | |
| 1166 } | |
| 1167 } | |
| 1168 | |
| 1169 void SkBitmap::unflatten(SkFlattenableReadBuffer& buffer) { | |
| 1170 this->reset(); | |
| 1171 | |
| 1172 int width = buffer.readInt(); | |
| 1173 int height = buffer.readInt(); | |
| 1174 int rowBytes = buffer.readInt(); | |
| 1175 int config = buffer.readU8(); | |
| 1176 | |
| 1177 this->setConfig((Config)config, width, height, rowBytes); | |
| 1178 this->setIsOpaque(buffer.readBool()); | |
| 1179 | |
| 1180 size_t size = this->getSize(); | |
| 1181 int reftype = buffer.readU8(); | |
| 1182 switch (reftype) { | |
| 1183 case SERIALIZE_PIXELTYPE_REF_PTR: { | |
| 1184 size_t offset = buffer.readU32(); | |
| 1185 SkPixelRef* pr = (SkPixelRef*)buffer.readRefCnt(); | |
| 1186 this->setPixelRef(pr, offset); | |
| 1187 break; | |
| 1188 } | |
| 1189 case SERIALIZE_PIXELTYPE_REF_DATA: { | |
| 1190 size_t offset = buffer.readU32(); | |
| 1191 SkPixelRef::Factory fact = deserialize_factory(buffer); | |
| 1192 SkPixelRef* pr = fact(buffer); | |
| 1193 this->setPixelRef(pr, offset)->safeUnref(); | |
| 1194 break; | |
| 1195 } | |
| 1196 case SERIALIZE_PIXELTYPE_RAW_WITH_CTABLE: | |
| 1197 case SERIALIZE_PIXELTYPE_RAW_NO_CTABLE: { | |
| 1198 SkColorTable* ctable = NULL; | |
| 1199 if (SERIALIZE_PIXELTYPE_RAW_WITH_CTABLE == reftype) { | |
| 1200 ctable = SkNEW_ARGS(SkColorTable, (buffer)); | |
| 1201 } | |
| 1202 if (this->allocPixels(ctable)) { | |
| 1203 this->lockPixels(); | |
| 1204 buffer.read(this->getPixels(), size); | |
| 1205 this->unlockPixels(); | |
| 1206 } else { | |
| 1207 buffer.skip(size); | |
| 1208 } | |
| 1209 ctable->safeUnref(); | |
| 1210 break; | |
| 1211 } | |
| 1212 case SERIALIZE_PIXELTYPE_NONE: | |
| 1213 break; | |
| 1214 default: | |
| 1215 SkASSERT(!"unrecognized pixeltype in serialized data"); | |
| 1216 sk_throw(); | |
| 1217 } | |
| 1218 } | |
| 1219 | |
| 1220 /////////////////////////////////////////////////////////////////////////////// | |
| 1221 | |
| 1222 SkBitmap::RLEPixels::RLEPixels(int width, int height) { | |
| 1223 fHeight = height; | |
| 1224 fYPtrs = (uint8_t**)sk_malloc_throw(height * sizeof(uint8_t*)); | |
| 1225 bzero(fYPtrs, height * sizeof(uint8_t*)); | |
| 1226 } | |
| 1227 | |
| 1228 SkBitmap::RLEPixels::~RLEPixels() { | |
| 1229 sk_free(fYPtrs); | |
| 1230 } | |
| 1231 | |
| 1232 /////////////////////////////////////////////////////////////////////////////// | |
| 1233 | |
| 1234 #ifdef SK_DEBUG | |
| 1235 void SkBitmap::validate() const { | |
| 1236 SkASSERT(fConfig < kConfigCount); | |
| 1237 SkASSERT(fRowBytes >= (unsigned)ComputeRowBytes((Config)fConfig, fWidth)); | |
| 1238 SkASSERT(fFlags <= kImageIsOpaque_Flag); | |
| 1239 SkASSERT(fPixelLockCount >= 0); | |
| 1240 SkASSERT(NULL == fColorTable || (unsigned)fColorTable->getRefCnt() < 10000); | |
| 1241 SkASSERT((uint8_t)ComputeBytesPerPixel((Config)fConfig) == fBytesPerPixel); | |
| 1242 | |
| 1243 #if 0 // these asserts are not thread-correct, so disable for now | |
| 1244 if (fPixelRef) { | |
| 1245 if (fPixelLockCount > 0) { | |
| 1246 SkASSERT(fPixelRef->getLockCount() > 0); | |
| 1247 } else { | |
| 1248 SkASSERT(NULL == fPixels); | |
| 1249 SkASSERT(NULL == fColorTable); | |
| 1250 } | |
| 1251 } | |
| 1252 #endif | |
| 1253 } | |
| 1254 #endif | |
| 1255 | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 113827:
Remove the remainder of the skia source code from the Chromium repo.... (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/