reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 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 | |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 29 | static bool isPos32Bits(const Sk64& value) { |
| 30 | return !value.isNeg() && value.is32(); |
| 31 | } |
| 32 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 33 | struct MipLevel { |
| 34 | void* fPixels; |
| 35 | uint32_t fRowBytes; |
reed@android.com | f459a49 | 2009-03-27 12:33:50 +0000 | [diff] [blame] | 36 | uint32_t fWidth, fHeight; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 37 | }; |
| 38 | |
| 39 | struct SkBitmap::MipMap : SkNoncopyable { |
| 40 | int32_t fRefCnt; |
| 41 | int fLevelCount; |
| 42 | // MipLevel fLevel[fLevelCount]; |
| 43 | // Pixels[] |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 44 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 45 | static MipMap* Alloc(int levelCount, size_t pixelSize) { |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 46 | if (levelCount < 0) { |
| 47 | return NULL; |
| 48 | } |
| 49 | Sk64 size; |
| 50 | size.setMul(levelCount + 1, sizeof(MipLevel)); |
| 51 | size.add(sizeof(MipMap)); |
| 52 | size.add(pixelSize); |
| 53 | if (!isPos32Bits(size)) { |
| 54 | return NULL; |
| 55 | } |
| 56 | MipMap* mm = (MipMap*)sk_malloc_throw(size.get32()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 57 | mm->fRefCnt = 1; |
| 58 | mm->fLevelCount = levelCount; |
| 59 | return mm; |
| 60 | } |
| 61 | |
| 62 | const MipLevel* levels() const { return (const MipLevel*)(this + 1); } |
| 63 | MipLevel* levels() { return (MipLevel*)(this + 1); } |
| 64 | |
| 65 | const void* pixels() const { return levels() + fLevelCount; } |
| 66 | void* pixels() { return levels() + fLevelCount; } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 67 | |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 68 | void ref() { |
| 69 | if (SK_MaxS32 == sk_atomic_inc(&fRefCnt)) { |
| 70 | sk_throw(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 71 | } |
| 72 | } |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 73 | void unref() { |
| 74 | SkASSERT(fRefCnt > 0); |
| 75 | if (sk_atomic_dec(&fRefCnt) == 1) { |
| 76 | sk_free(this); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 77 | } |
| 78 | } |
| 79 | }; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 80 | |
| 81 | /////////////////////////////////////////////////////////////////////////////// |
| 82 | /////////////////////////////////////////////////////////////////////////////// |
| 83 | |
| 84 | SkBitmap::SkBitmap() { |
reed@android.com | 4516f47 | 2009-06-29 16:25:36 +0000 | [diff] [blame] | 85 | sk_bzero(this, sizeof(*this)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 86 | } |
| 87 | |
| 88 | SkBitmap::SkBitmap(const SkBitmap& src) { |
| 89 | SkDEBUGCODE(src.validate();) |
reed@android.com | 4516f47 | 2009-06-29 16:25:36 +0000 | [diff] [blame] | 90 | sk_bzero(this, sizeof(*this)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 91 | *this = src; |
| 92 | SkDEBUGCODE(this->validate();) |
| 93 | } |
| 94 | |
| 95 | SkBitmap::~SkBitmap() { |
| 96 | SkDEBUGCODE(this->validate();) |
| 97 | this->freePixels(); |
| 98 | } |
| 99 | |
| 100 | SkBitmap& SkBitmap::operator=(const SkBitmap& src) { |
| 101 | if (this != &src) { |
| 102 | this->freePixels(); |
| 103 | memcpy(this, &src, sizeof(src)); |
| 104 | |
| 105 | // inc src reference counts |
reed@android.com | 83f7bc3 | 2009-07-17 02:42:41 +0000 | [diff] [blame] | 106 | SkSafeRef(src.fPixelRef); |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 107 | SkSafeRef(src.fMipMap); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 108 | |
| 109 | // we reset our locks if we get blown away |
| 110 | fPixelLockCount = 0; |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 111 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 112 | /* The src could be in 3 states |
| 113 | 1. no pixelref, in which case we just copy/ref the pixels/ctable |
| 114 | 2. unlocked pixelref, pixels/ctable should be null |
| 115 | 3. locked pixelref, we should lock the ref again ourselves |
| 116 | */ |
| 117 | if (NULL == fPixelRef) { |
| 118 | // leave fPixels as it is |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 119 | SkSafeRef(fColorTable); // ref the user's ctable if present |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 120 | } else { // we have a pixelref, so pixels/ctable reflect it |
| 121 | // ignore the values from the memcpy |
| 122 | fPixels = NULL; |
| 123 | fColorTable = NULL; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | SkDEBUGCODE(this->validate();) |
| 128 | return *this; |
| 129 | } |
| 130 | |
| 131 | void SkBitmap::swap(SkBitmap& other) { |
| 132 | SkTSwap<SkColorTable*>(fColorTable, other.fColorTable); |
| 133 | SkTSwap<SkPixelRef*>(fPixelRef, other.fPixelRef); |
| 134 | SkTSwap<size_t>(fPixelRefOffset, other.fPixelRefOffset); |
| 135 | SkTSwap<int>(fPixelLockCount, other.fPixelLockCount); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 136 | SkTSwap<MipMap*>(fMipMap, other.fMipMap); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 137 | SkTSwap<void*>(fPixels, other.fPixels); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 138 | SkTSwap<uint32_t>(fRowBytes, other.fRowBytes); |
reed@android.com | f459a49 | 2009-03-27 12:33:50 +0000 | [diff] [blame] | 139 | SkTSwap<uint32_t>(fWidth, other.fWidth); |
| 140 | SkTSwap<uint32_t>(fHeight, other.fHeight); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 141 | SkTSwap<uint8_t>(fConfig, other.fConfig); |
| 142 | SkTSwap<uint8_t>(fFlags, other.fFlags); |
| 143 | SkTSwap<uint8_t>(fBytesPerPixel, other.fBytesPerPixel); |
| 144 | |
| 145 | SkDEBUGCODE(this->validate();) |
| 146 | } |
| 147 | |
| 148 | void SkBitmap::reset() { |
| 149 | this->freePixels(); |
reed@android.com | 4516f47 | 2009-06-29 16:25:36 +0000 | [diff] [blame] | 150 | sk_bzero(this, sizeof(*this)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 151 | } |
| 152 | |
| 153 | int SkBitmap::ComputeBytesPerPixel(SkBitmap::Config config) { |
| 154 | int bpp; |
| 155 | switch (config) { |
| 156 | case kNo_Config: |
| 157 | case kA1_Config: |
| 158 | bpp = 0; // not applicable |
| 159 | break; |
| 160 | case kRLE_Index8_Config: |
| 161 | case kA8_Config: |
| 162 | case kIndex8_Config: |
| 163 | bpp = 1; |
| 164 | break; |
| 165 | case kRGB_565_Config: |
| 166 | case kARGB_4444_Config: |
| 167 | bpp = 2; |
| 168 | break; |
| 169 | case kARGB_8888_Config: |
| 170 | bpp = 4; |
| 171 | break; |
| 172 | default: |
| 173 | SkASSERT(!"unknown config"); |
| 174 | bpp = 0; // error |
| 175 | break; |
| 176 | } |
| 177 | return bpp; |
| 178 | } |
| 179 | |
| 180 | int SkBitmap::ComputeRowBytes(Config c, int width) { |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 181 | if (width < 0) { |
| 182 | return 0; |
| 183 | } |
| 184 | |
| 185 | Sk64 rowBytes; |
| 186 | rowBytes.setZero(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 187 | |
| 188 | switch (c) { |
| 189 | case kNo_Config: |
| 190 | case kRLE_Index8_Config: |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 191 | break; |
| 192 | case kA1_Config: |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 193 | rowBytes.set(width); |
| 194 | rowBytes.add(7); |
| 195 | rowBytes.shiftRight(3); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 196 | break; |
| 197 | case kA8_Config: |
| 198 | case kIndex8_Config: |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 199 | rowBytes.set(width); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 200 | break; |
| 201 | case kRGB_565_Config: |
| 202 | case kARGB_4444_Config: |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 203 | rowBytes.set(width); |
| 204 | rowBytes.shiftLeft(1); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 205 | break; |
| 206 | case kARGB_8888_Config: |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 207 | rowBytes.set(width); |
| 208 | rowBytes.shiftLeft(2); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 209 | break; |
| 210 | default: |
| 211 | SkASSERT(!"unknown config"); |
| 212 | break; |
| 213 | } |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 214 | return isPos32Bits(rowBytes) ? rowBytes.get32() : 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | Sk64 SkBitmap::ComputeSize64(Config c, int width, int height) { |
| 218 | Sk64 size; |
| 219 | size.setMul(SkBitmap::ComputeRowBytes(c, width), height); |
| 220 | return size; |
| 221 | } |
| 222 | |
| 223 | size_t SkBitmap::ComputeSize(Config c, int width, int height) { |
| 224 | Sk64 size = SkBitmap::ComputeSize64(c, width, height); |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 225 | return isPos32Bits(size) ? size.get32() : 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 226 | } |
| 227 | |
wjmaclean@chromium.org | 86bff1f | 2010-11-16 20:22:41 +0000 | [diff] [blame] | 228 | Sk64 SkBitmap::ComputeSafeSize64(Config config, |
| 229 | uint32_t width, |
| 230 | uint32_t height, |
| 231 | uint32_t rowBytes) { |
| 232 | Sk64 safeSize; |
| 233 | safeSize.setZero(); |
| 234 | if (height > 0) { |
| 235 | safeSize.set(ComputeRowBytes(config, width)); |
| 236 | Sk64 sizeAllButLastRow; |
| 237 | sizeAllButLastRow.setMul(height - 1, rowBytes); |
| 238 | safeSize.add(sizeAllButLastRow); |
| 239 | } |
| 240 | SkASSERT(!safeSize.isNeg()); |
| 241 | return safeSize; |
| 242 | } |
| 243 | |
| 244 | size_t SkBitmap::ComputeSafeSize(Config config, |
| 245 | uint32_t width, |
| 246 | uint32_t height, |
| 247 | uint32_t rowBytes) { |
| 248 | Sk64 safeSize = ComputeSafeSize64(config, width, height, rowBytes); |
| 249 | return (safeSize.is32() ? safeSize.get32() : 0); |
| 250 | } |
| 251 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 252 | void SkBitmap::setConfig(Config c, int width, int height, int rowBytes) { |
| 253 | this->freePixels(); |
| 254 | |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 255 | if ((width | height | rowBytes) < 0) { |
agl@chromium.org | 6b8cb25 | 2009-06-01 23:52:37 +0000 | [diff] [blame] | 256 | goto err; |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 257 | } |
| 258 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 259 | if (rowBytes == 0) { |
| 260 | rowBytes = SkBitmap::ComputeRowBytes(c, width); |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 261 | if (0 == rowBytes && kNo_Config != c) { |
agl@chromium.org | 6b8cb25 | 2009-06-01 23:52:37 +0000 | [diff] [blame] | 262 | goto err; |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 263 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 264 | } |
reed@android.com | 89bb83a | 2009-05-29 21:30:42 +0000 | [diff] [blame] | 265 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 266 | fConfig = SkToU8(c); |
reed@android.com | f459a49 | 2009-03-27 12:33:50 +0000 | [diff] [blame] | 267 | fWidth = width; |
| 268 | fHeight = height; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 269 | fRowBytes = rowBytes; |
| 270 | |
| 271 | fBytesPerPixel = (uint8_t)ComputeBytesPerPixel(c); |
| 272 | |
| 273 | SkDEBUGCODE(this->validate();) |
reed@android.com | 9e0c2fc | 2009-06-02 18:54:28 +0000 | [diff] [blame] | 274 | return; |
agl@chromium.org | 6b8cb25 | 2009-06-01 23:52:37 +0000 | [diff] [blame] | 275 | |
reed@android.com | 9e0c2fc | 2009-06-02 18:54:28 +0000 | [diff] [blame] | 276 | // if we got here, we had an error, so we reset the bitmap to empty |
agl@chromium.org | 6b8cb25 | 2009-06-01 23:52:37 +0000 | [diff] [blame] | 277 | err: |
| 278 | this->reset(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 279 | } |
| 280 | |
| 281 | void SkBitmap::updatePixelsFromRef() const { |
| 282 | if (NULL != fPixelRef) { |
| 283 | if (fPixelLockCount > 0) { |
| 284 | SkASSERT(fPixelRef->getLockCount() > 0); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 285 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 286 | void* p = fPixelRef->pixels(); |
| 287 | if (NULL != p) { |
| 288 | p = (char*)p + fPixelRefOffset; |
| 289 | } |
| 290 | fPixels = p; |
| 291 | SkRefCnt_SafeAssign(fColorTable, fPixelRef->colorTable()); |
| 292 | } else { |
| 293 | SkASSERT(0 == fPixelLockCount); |
| 294 | fPixels = NULL; |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 295 | if (fColorTable) { |
| 296 | fColorTable->unref(); |
| 297 | fColorTable = NULL; |
| 298 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 299 | } |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | SkPixelRef* SkBitmap::setPixelRef(SkPixelRef* pr, size_t offset) { |
| 304 | // do this first, we that we never have a non-zero offset with a null ref |
| 305 | if (NULL == pr) { |
| 306 | offset = 0; |
| 307 | } |
| 308 | |
| 309 | if (fPixelRef != pr || fPixelRefOffset != offset) { |
| 310 | if (fPixelRef != pr) { |
| 311 | this->freePixels(); |
| 312 | SkASSERT(NULL == fPixelRef); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 313 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 314 | SkSafeRef(pr); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 315 | fPixelRef = pr; |
| 316 | } |
| 317 | fPixelRefOffset = offset; |
| 318 | this->updatePixelsFromRef(); |
| 319 | } |
| 320 | |
| 321 | SkDEBUGCODE(this->validate();) |
| 322 | return pr; |
| 323 | } |
| 324 | |
| 325 | void SkBitmap::lockPixels() const { |
| 326 | if (NULL != fPixelRef && 1 == ++fPixelLockCount) { |
| 327 | fPixelRef->lockPixels(); |
| 328 | this->updatePixelsFromRef(); |
| 329 | } |
| 330 | SkDEBUGCODE(this->validate();) |
| 331 | } |
| 332 | |
| 333 | void SkBitmap::unlockPixels() const { |
| 334 | SkASSERT(NULL == fPixelRef || fPixelLockCount > 0); |
| 335 | |
| 336 | if (NULL != fPixelRef && 0 == --fPixelLockCount) { |
| 337 | fPixelRef->unlockPixels(); |
| 338 | this->updatePixelsFromRef(); |
| 339 | } |
| 340 | SkDEBUGCODE(this->validate();) |
| 341 | } |
| 342 | |
| 343 | void SkBitmap::setPixels(void* p, SkColorTable* ctable) { |
| 344 | this->freePixels(); |
| 345 | fPixels = p; |
| 346 | SkRefCnt_SafeAssign(fColorTable, ctable); |
| 347 | |
| 348 | SkDEBUGCODE(this->validate();) |
| 349 | } |
| 350 | |
| 351 | bool SkBitmap::allocPixels(Allocator* allocator, SkColorTable* ctable) { |
| 352 | HeapAllocator stdalloc; |
| 353 | |
| 354 | if (NULL == allocator) { |
| 355 | allocator = &stdalloc; |
| 356 | } |
| 357 | return allocator->allocPixelRef(this, ctable); |
| 358 | } |
| 359 | |
| 360 | void SkBitmap::freePixels() { |
| 361 | // if we're gonna free the pixels, we certainly need to free the mipmap |
| 362 | this->freeMipMap(); |
| 363 | |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 364 | if (fColorTable) { |
| 365 | fColorTable->unref(); |
| 366 | fColorTable = NULL; |
| 367 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 368 | |
| 369 | if (NULL != fPixelRef) { |
| 370 | if (fPixelLockCount > 0) { |
| 371 | fPixelRef->unlockPixels(); |
| 372 | } |
| 373 | fPixelRef->unref(); |
| 374 | fPixelRef = NULL; |
| 375 | fPixelRefOffset = 0; |
| 376 | } |
| 377 | fPixelLockCount = 0; |
| 378 | fPixels = NULL; |
| 379 | } |
| 380 | |
| 381 | void SkBitmap::freeMipMap() { |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 382 | if (fMipMap) { |
| 383 | fMipMap->unref(); |
| 384 | fMipMap = NULL; |
| 385 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 386 | } |
| 387 | |
| 388 | uint32_t SkBitmap::getGenerationID() const { |
| 389 | return fPixelRef ? fPixelRef->getGenerationID() : 0; |
| 390 | } |
| 391 | |
| 392 | void SkBitmap::notifyPixelsChanged() const { |
| 393 | if (fPixelRef) { |
| 394 | fPixelRef->notifyPixelsChanged(); |
| 395 | } |
| 396 | } |
| 397 | |
reed@android.com | ce4e53a | 2010-09-09 16:01:26 +0000 | [diff] [blame] | 398 | SkGpuTexture* SkBitmap::getTexture() const { |
| 399 | return fPixelRef ? fPixelRef->getTexture() : NULL; |
| 400 | } |
| 401 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 402 | /////////////////////////////////////////////////////////////////////////////// |
| 403 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 404 | /** We explicitly use the same allocator for our pixels that SkMask does, |
| 405 | so that we can freely assign memory allocated by one class to the other. |
| 406 | */ |
| 407 | bool SkBitmap::HeapAllocator::allocPixelRef(SkBitmap* dst, |
| 408 | SkColorTable* ctable) { |
| 409 | Sk64 size = dst->getSize64(); |
| 410 | if (size.isNeg() || !size.is32()) { |
| 411 | return false; |
| 412 | } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 413 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 414 | void* addr = sk_malloc_flags(size.get32(), 0); // returns NULL on failure |
| 415 | if (NULL == addr) { |
| 416 | return false; |
| 417 | } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 418 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 419 | dst->setPixelRef(new SkMallocPixelRef(addr, size.get32(), ctable))->unref(); |
| 420 | // since we're already allocated, we lockPixels right away |
| 421 | dst->lockPixels(); |
| 422 | return true; |
| 423 | } |
| 424 | |
| 425 | /////////////////////////////////////////////////////////////////////////////// |
| 426 | |
wjmaclean@chromium.org | 86bff1f | 2010-11-16 20:22:41 +0000 | [diff] [blame] | 427 | size_t SkBitmap::getSafeSize() const { |
| 428 | // This is intended to be a size_t version of ComputeSafeSize64(), just |
| 429 | // faster. The computation is meant to be identical. |
| 430 | return (fHeight ? ((fHeight - 1) * fRowBytes) + |
| 431 | ComputeRowBytes(getConfig(), fWidth): 0); |
| 432 | } |
| 433 | |
| 434 | Sk64 SkBitmap::getSafeSize64() const { |
| 435 | return ComputeSafeSize64(getConfig(), fWidth, fHeight, fRowBytes); |
| 436 | } |
| 437 | |
| 438 | bool SkBitmap::copyPixelsTo(void* const dst, size_t dstSize, int dstRowBytes) |
| 439 | const { |
| 440 | |
| 441 | if (dstRowBytes == -1) |
| 442 | dstRowBytes = fRowBytes; |
| 443 | SkASSERT(dstRowBytes >= 0); |
| 444 | |
| 445 | if (getConfig() == kRLE_Index8_Config || |
| 446 | dstRowBytes < ComputeRowBytes(getConfig(), fWidth) || |
| 447 | dst == NULL || (getPixels() == NULL && pixelRef() == NULL)) |
| 448 | return false; |
| 449 | |
| 450 | if (static_cast<uint32_t>(dstRowBytes) == fRowBytes) { |
| 451 | size_t safeSize = getSafeSize(); |
| 452 | if (safeSize > dstSize || safeSize == 0) |
| 453 | return false; |
| 454 | else { |
| 455 | SkAutoLockPixels lock(*this); |
| 456 | // This implementation will write bytes beyond the end of each row, |
| 457 | // excluding the last row, if the bitmap's stride is greater than |
| 458 | // strictly required by the current config. |
| 459 | memcpy(dst, getPixels(), safeSize); |
| 460 | |
| 461 | return true; |
| 462 | } |
| 463 | } else { |
| 464 | // If destination has different stride than us, then copy line by line. |
| 465 | if (ComputeSafeSize(getConfig(), fWidth, fHeight, dstRowBytes) > |
| 466 | dstSize) |
| 467 | return false; |
| 468 | else { |
| 469 | // Just copy what we need on each line. |
| 470 | uint32_t rowBytes = ComputeRowBytes(getConfig(), fWidth); |
| 471 | SkAutoLockPixels lock(*this); |
| 472 | const uint8_t* srcP = reinterpret_cast<const uint8_t*>(getPixels()); |
| 473 | uint8_t* dstP = reinterpret_cast<uint8_t*>(dst); |
| 474 | for (uint32_t row = 0; row < fHeight; |
| 475 | row++, srcP += fRowBytes, dstP += dstRowBytes) { |
| 476 | memcpy(dstP, srcP, rowBytes); |
| 477 | } |
| 478 | |
| 479 | return true; |
| 480 | } |
| 481 | } |
| 482 | } |
| 483 | |
| 484 | bool SkBitmap::copyPixelsFrom(const void* const src, size_t srcSize, |
| 485 | int srcRowBytes) { |
| 486 | |
| 487 | if (srcRowBytes == -1) |
| 488 | srcRowBytes = fRowBytes; |
| 489 | SkASSERT(srcRowBytes >= 0); |
| 490 | |
| 491 | size_t safeSize = getSafeSize(); |
| 492 | uint32_t rowBytes = ComputeRowBytes(getConfig(), fWidth); |
| 493 | if (getConfig() == kRLE_Index8_Config || src == NULL || |
| 494 | static_cast<uint32_t>(srcRowBytes) < rowBytes || |
| 495 | safeSize == 0 || |
| 496 | srcSize < ComputeSafeSize(getConfig(), fWidth, fHeight, srcRowBytes)) { |
| 497 | return false; |
| 498 | } |
| 499 | |
| 500 | SkAutoLockPixels lock(*this); |
| 501 | if (static_cast<uint32_t>(srcRowBytes) == fRowBytes) { |
| 502 | // This implementation will write bytes beyond the end of each row, |
| 503 | // excluding the last row, if the bitmap's stride is greater than |
| 504 | // strictly required by the current config. |
| 505 | memcpy(getPixels(), src, safeSize); |
| 506 | } else { |
| 507 | // Just copy the bytes we need on each line. |
| 508 | const uint8_t* srcP = reinterpret_cast<const uint8_t*>(src); |
| 509 | uint8_t* dstP = reinterpret_cast<uint8_t*>(getPixels()); |
| 510 | for (uint32_t row = 0; row < fHeight; |
| 511 | row++, srcP += srcRowBytes, dstP += fRowBytes) { |
| 512 | memcpy(dstP, srcP, rowBytes); |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | return true; |
| 517 | } |
| 518 | |
| 519 | /////////////////////////////////////////////////////////////////////////////// |
| 520 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 521 | bool SkBitmap::isOpaque() const { |
| 522 | switch (fConfig) { |
| 523 | case kNo_Config: |
| 524 | return true; |
| 525 | |
| 526 | case kA1_Config: |
| 527 | case kA8_Config: |
| 528 | case kARGB_4444_Config: |
| 529 | case kARGB_8888_Config: |
| 530 | return (fFlags & kImageIsOpaque_Flag) != 0; |
| 531 | |
| 532 | case kIndex8_Config: |
| 533 | case kRLE_Index8_Config: { |
| 534 | uint32_t flags = 0; |
| 535 | |
| 536 | this->lockPixels(); |
| 537 | // if lockPixels failed, we may not have a ctable ptr |
| 538 | if (fColorTable) { |
| 539 | flags = fColorTable->getFlags(); |
| 540 | } |
| 541 | this->unlockPixels(); |
| 542 | |
| 543 | return (flags & SkColorTable::kColorsAreOpaque_Flag) != 0; |
| 544 | } |
| 545 | |
| 546 | case kRGB_565_Config: |
| 547 | return true; |
| 548 | |
| 549 | default: |
| 550 | SkASSERT(!"unknown bitmap config pased to isOpaque"); |
| 551 | return false; |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | void SkBitmap::setIsOpaque(bool isOpaque) { |
| 556 | /* we record this regardless of fConfig, though it is ignored in |
| 557 | isOpaque() for configs that can't support per-pixel alpha. |
| 558 | */ |
| 559 | if (isOpaque) { |
| 560 | fFlags |= kImageIsOpaque_Flag; |
| 561 | } else { |
| 562 | fFlags &= ~kImageIsOpaque_Flag; |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | void* SkBitmap::getAddr(int x, int y) const { |
| 567 | SkASSERT((unsigned)x < (unsigned)this->width()); |
| 568 | SkASSERT((unsigned)y < (unsigned)this->height()); |
| 569 | |
| 570 | char* base = (char*)this->getPixels(); |
| 571 | if (base) { |
| 572 | base += y * this->rowBytes(); |
| 573 | switch (this->config()) { |
| 574 | case SkBitmap::kARGB_8888_Config: |
| 575 | base += x << 2; |
| 576 | break; |
| 577 | case SkBitmap::kARGB_4444_Config: |
| 578 | case SkBitmap::kRGB_565_Config: |
| 579 | base += x << 1; |
| 580 | break; |
| 581 | case SkBitmap::kA8_Config: |
| 582 | case SkBitmap::kIndex8_Config: |
| 583 | base += x; |
| 584 | break; |
| 585 | case SkBitmap::kA1_Config: |
| 586 | base += x >> 3; |
| 587 | break; |
| 588 | case kRLE_Index8_Config: |
| 589 | SkASSERT(!"Can't return addr for kRLE_Index8_Config"); |
| 590 | base = NULL; |
| 591 | break; |
| 592 | default: |
| 593 | SkASSERT(!"Can't return addr for config"); |
| 594 | base = NULL; |
| 595 | break; |
| 596 | } |
| 597 | } |
| 598 | return base; |
| 599 | } |
| 600 | |
| 601 | /////////////////////////////////////////////////////////////////////////////// |
| 602 | /////////////////////////////////////////////////////////////////////////////// |
| 603 | |
| 604 | void SkBitmap::eraseARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b) const { |
| 605 | SkDEBUGCODE(this->validate();) |
| 606 | |
| 607 | if (0 == fWidth || 0 == fHeight || |
| 608 | kNo_Config == fConfig || kIndex8_Config == fConfig) { |
| 609 | return; |
| 610 | } |
| 611 | |
| 612 | SkAutoLockPixels alp(*this); |
| 613 | // perform this check after the lock call |
| 614 | if (!this->readyToDraw()) { |
| 615 | return; |
| 616 | } |
| 617 | |
| 618 | int height = fHeight; |
| 619 | const int width = fWidth; |
| 620 | const int rowBytes = fRowBytes; |
| 621 | |
| 622 | // make rgb premultiplied |
| 623 | if (255 != a) { |
| 624 | r = SkAlphaMul(r, a); |
| 625 | g = SkAlphaMul(g, a); |
| 626 | b = SkAlphaMul(b, a); |
| 627 | } |
| 628 | |
| 629 | switch (fConfig) { |
| 630 | case kA1_Config: { |
| 631 | uint8_t* p = (uint8_t*)fPixels; |
| 632 | const int count = (width + 7) >> 3; |
| 633 | a = (a >> 7) ? 0xFF : 0; |
| 634 | SkASSERT(count <= rowBytes); |
| 635 | while (--height >= 0) { |
| 636 | memset(p, a, count); |
| 637 | p += rowBytes; |
| 638 | } |
| 639 | break; |
| 640 | } |
| 641 | case kA8_Config: { |
| 642 | uint8_t* p = (uint8_t*)fPixels; |
| 643 | while (--height >= 0) { |
| 644 | memset(p, a, width); |
| 645 | p += rowBytes; |
| 646 | } |
| 647 | break; |
| 648 | } |
| 649 | case kARGB_4444_Config: |
| 650 | case kRGB_565_Config: { |
| 651 | uint16_t* p = (uint16_t*)fPixels; |
| 652 | uint16_t v; |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 653 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 654 | if (kARGB_4444_Config == fConfig) { |
| 655 | v = SkPackARGB4444(a >> 4, r >> 4, g >> 4, b >> 4); |
| 656 | } else { // kRGB_565_Config |
| 657 | v = SkPackRGB16(r >> (8 - SK_R16_BITS), g >> (8 - SK_G16_BITS), |
| 658 | b >> (8 - SK_B16_BITS)); |
| 659 | } |
| 660 | while (--height >= 0) { |
| 661 | sk_memset16(p, v, width); |
| 662 | p = (uint16_t*)((char*)p + rowBytes); |
| 663 | } |
| 664 | break; |
| 665 | } |
| 666 | case kARGB_8888_Config: { |
| 667 | uint32_t* p = (uint32_t*)fPixels; |
| 668 | uint32_t v = SkPackARGB32(a, r, g, b); |
| 669 | |
| 670 | while (--height >= 0) { |
| 671 | sk_memset32(p, v, width); |
| 672 | p = (uint32_t*)((char*)p + rowBytes); |
| 673 | } |
| 674 | break; |
| 675 | } |
| 676 | } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 677 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 678 | this->notifyPixelsChanged(); |
| 679 | } |
| 680 | |
| 681 | ////////////////////////////////////////////////////////////////////////////////////// |
| 682 | ////////////////////////////////////////////////////////////////////////////////////// |
| 683 | |
| 684 | #define SUB_OFFSET_FAILURE ((size_t)-1) |
| 685 | |
| 686 | static size_t getSubOffset(const SkBitmap& bm, int x, int y) { |
| 687 | SkASSERT((unsigned)x < (unsigned)bm.width()); |
| 688 | SkASSERT((unsigned)y < (unsigned)bm.height()); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 689 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 690 | switch (bm.getConfig()) { |
| 691 | case SkBitmap::kA8_Config: |
| 692 | case SkBitmap:: kIndex8_Config: |
| 693 | // x is fine as is for the calculation |
| 694 | break; |
| 695 | |
| 696 | case SkBitmap::kRGB_565_Config: |
| 697 | case SkBitmap::kARGB_4444_Config: |
| 698 | x <<= 1; |
| 699 | break; |
| 700 | |
| 701 | case SkBitmap::kARGB_8888_Config: |
| 702 | x <<= 2; |
| 703 | break; |
| 704 | |
| 705 | case SkBitmap::kNo_Config: |
| 706 | case SkBitmap::kA1_Config: |
| 707 | default: |
| 708 | return SUB_OFFSET_FAILURE; |
| 709 | } |
| 710 | return y * bm.rowBytes() + x; |
| 711 | } |
| 712 | |
| 713 | bool SkBitmap::extractSubset(SkBitmap* result, const SkIRect& subset) const { |
| 714 | SkDEBUGCODE(this->validate();) |
| 715 | |
| 716 | if (NULL == result || (NULL == fPixelRef && NULL == fPixels)) { |
| 717 | return false; // no src pixels |
| 718 | } |
| 719 | |
| 720 | SkIRect srcRect, r; |
| 721 | srcRect.set(0, 0, this->width(), this->height()); |
| 722 | if (!r.intersect(srcRect, subset)) { |
| 723 | return false; // r is empty (i.e. no intersection) |
| 724 | } |
| 725 | |
| 726 | if (kRLE_Index8_Config == fConfig) { |
| 727 | SkAutoLockPixels alp(*this); |
| 728 | // don't call readyToDraw(), since we can operate w/o a colortable |
| 729 | // at this stage |
| 730 | if (this->getPixels() == NULL) { |
| 731 | return false; |
| 732 | } |
| 733 | SkBitmap bm; |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 734 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 735 | bm.setConfig(kIndex8_Config, r.width(), r.height()); |
| 736 | bm.allocPixels(this->getColorTable()); |
| 737 | if (NULL == bm.getPixels()) { |
| 738 | return false; |
| 739 | } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 740 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 741 | const RLEPixels* rle = (const RLEPixels*)this->getPixels(); |
| 742 | uint8_t* dst = bm.getAddr8(0, 0); |
| 743 | const int width = bm.width(); |
| 744 | const int rowBytes = bm.rowBytes(); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 745 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 746 | for (int y = r.fTop; y < r.fBottom; y++) { |
| 747 | SkPackBits::Unpack8(dst, r.fLeft, width, rle->packedAtY(y)); |
| 748 | dst += rowBytes; |
| 749 | } |
| 750 | result->swap(bm); |
| 751 | return true; |
| 752 | } |
| 753 | |
| 754 | size_t offset = getSubOffset(*this, r.fLeft, r.fTop); |
| 755 | if (SUB_OFFSET_FAILURE == offset) { |
| 756 | return false; // config not supported |
| 757 | } |
| 758 | |
| 759 | SkBitmap dst; |
| 760 | dst.setConfig(this->config(), r.width(), r.height(), this->rowBytes()); |
| 761 | |
| 762 | if (fPixelRef) { |
| 763 | // share the pixelref with a custom offset |
| 764 | dst.setPixelRef(fPixelRef, fPixelRefOffset + offset); |
| 765 | } else { |
| 766 | // share the pixels (owned by the caller) |
| 767 | dst.setPixels((char*)fPixels + offset, this->getColorTable()); |
| 768 | } |
| 769 | SkDEBUGCODE(dst.validate();) |
| 770 | |
| 771 | // we know we're good, so commit to result |
| 772 | result->swap(dst); |
| 773 | return true; |
| 774 | } |
| 775 | |
| 776 | /////////////////////////////////////////////////////////////////////////////// |
| 777 | |
| 778 | #include "SkCanvas.h" |
| 779 | #include "SkPaint.h" |
| 780 | |
reed@android.com | fbaa88d | 2009-05-06 17:44:34 +0000 | [diff] [blame] | 781 | bool SkBitmap::canCopyTo(Config dstConfig) const { |
| 782 | if (this->getConfig() == kNo_Config) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 783 | return false; |
| 784 | } |
| 785 | |
reed@android.com | fbaa88d | 2009-05-06 17:44:34 +0000 | [diff] [blame] | 786 | bool sameConfigs = (this->config() == dstConfig); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 787 | switch (dstConfig) { |
| 788 | case kA8_Config: |
| 789 | case kARGB_4444_Config: |
| 790 | case kRGB_565_Config: |
| 791 | case kARGB_8888_Config: |
| 792 | break; |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 793 | case kA1_Config: |
| 794 | case kIndex8_Config: |
| 795 | if (!sameConfigs) { |
| 796 | return false; |
| 797 | } |
| 798 | break; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 799 | default: |
| 800 | return false; |
| 801 | } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 802 | |
| 803 | // do not copy src if srcConfig == kA1_Config while dstConfig != kA1_Config |
| 804 | if (this->getConfig() == kA1_Config && !sameConfigs) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 805 | return false; |
| 806 | } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 807 | |
reed@android.com | fbaa88d | 2009-05-06 17:44:34 +0000 | [diff] [blame] | 808 | return true; |
| 809 | } |
| 810 | |
| 811 | bool SkBitmap::copyTo(SkBitmap* dst, Config dstConfig, Allocator* alloc) const { |
| 812 | if (!this->canCopyTo(dstConfig)) { |
| 813 | return false; |
| 814 | } |
| 815 | |
reed@android.com | 311c82d | 2009-05-05 23:13:23 +0000 | [diff] [blame] | 816 | // we lock this now, since we may need its colortable |
| 817 | SkAutoLockPixels srclock(*this); |
reed@android.com | fbaa88d | 2009-05-06 17:44:34 +0000 | [diff] [blame] | 818 | if (!this->readyToDraw()) { |
| 819 | return false; |
| 820 | } |
reed@android.com | 311c82d | 2009-05-05 23:13:23 +0000 | [diff] [blame] | 821 | |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 822 | SkBitmap tmp; |
| 823 | tmp.setConfig(dstConfig, this->width(), this->height()); |
| 824 | |
| 825 | // allocate colortable if srcConfig == kIndex8_Config |
| 826 | SkColorTable* ctable = (dstConfig == kIndex8_Config) ? |
| 827 | new SkColorTable(*this->getColorTable()) : NULL; |
| 828 | SkAutoUnref au(ctable); |
| 829 | if (!tmp.allocPixels(alloc, ctable)) { |
| 830 | return false; |
| 831 | } |
| 832 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 833 | SkAutoLockPixels dstlock(tmp); |
reed@android.com | fbaa88d | 2009-05-06 17:44:34 +0000 | [diff] [blame] | 834 | if (!tmp.readyToDraw()) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 835 | // allocator/lock failed |
| 836 | return false; |
| 837 | } |
| 838 | |
reed@android.com | fbaa88d | 2009-05-06 17:44:34 +0000 | [diff] [blame] | 839 | /* do memcpy for the same configs cases, else use drawing |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 840 | */ |
reed@android.com | fbaa88d | 2009-05-06 17:44:34 +0000 | [diff] [blame] | 841 | if (this->config() == dstConfig) { |
reed@android.com | 311c82d | 2009-05-05 23:13:23 +0000 | [diff] [blame] | 842 | if (tmp.getSize() == this->getSize()) { |
wjmaclean@chromium.org | 0bde180 | 2010-12-22 17:43:54 +0000 | [diff] [blame] | 843 | memcpy(tmp.getPixels(), this->getPixels(), this->getSafeSize()); |
reed@android.com | 311c82d | 2009-05-05 23:13:23 +0000 | [diff] [blame] | 844 | } else { |
| 845 | const char* srcP = reinterpret_cast<const char*>(this->getPixels()); |
| 846 | char* dstP = reinterpret_cast<char*>(tmp.getPixels()); |
| 847 | // to be sure we don't read too much, only copy our logical pixels |
| 848 | size_t bytesToCopy = tmp.width() * tmp.bytesPerPixel(); |
| 849 | for (int y = 0; y < tmp.height(); y++) { |
| 850 | memcpy(dstP, srcP, bytesToCopy); |
| 851 | srcP += this->rowBytes(); |
| 852 | dstP += tmp.rowBytes(); |
| 853 | } |
| 854 | } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 855 | } else { |
| 856 | // if the src has alpha, we have to clear the dst first |
| 857 | if (!this->isOpaque()) { |
| 858 | tmp.eraseColor(0); |
| 859 | } |
| 860 | |
| 861 | SkCanvas canvas(tmp); |
| 862 | SkPaint paint; |
| 863 | |
| 864 | paint.setDither(true); |
| 865 | canvas.drawBitmap(*this, 0, 0, &paint); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 866 | } |
| 867 | |
reed@android.com | cafc9f9 | 2009-08-22 03:44:57 +0000 | [diff] [blame] | 868 | tmp.setIsOpaque(this->isOpaque()); |
| 869 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 870 | dst->swap(tmp); |
| 871 | return true; |
| 872 | } |
| 873 | |
| 874 | /////////////////////////////////////////////////////////////////////////////// |
| 875 | /////////////////////////////////////////////////////////////////////////////// |
| 876 | |
| 877 | static void downsampleby2_proc32(SkBitmap* dst, int x, int y, |
| 878 | const SkBitmap& src) { |
| 879 | x <<= 1; |
| 880 | y <<= 1; |
| 881 | const SkPMColor* p = src.getAddr32(x, y); |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 882 | const SkPMColor* baseP = p; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 883 | SkPMColor c, ag, rb; |
| 884 | |
| 885 | c = *p; ag = (c >> 8) & 0xFF00FF; rb = c & 0xFF00FF; |
| 886 | if (x < src.width() - 1) { |
| 887 | p += 1; |
| 888 | } |
| 889 | c = *p; ag += (c >> 8) & 0xFF00FF; rb += c & 0xFF00FF; |
| 890 | |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 891 | p = baseP; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 892 | if (y < src.height() - 1) { |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 893 | p += src.rowBytes() >> 2; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 894 | } |
| 895 | c = *p; ag += (c >> 8) & 0xFF00FF; rb += c & 0xFF00FF; |
| 896 | if (x < src.width() - 1) { |
| 897 | p += 1; |
| 898 | } |
| 899 | c = *p; ag += (c >> 8) & 0xFF00FF; rb += c & 0xFF00FF; |
| 900 | |
| 901 | *dst->getAddr32(x >> 1, y >> 1) = |
| 902 | ((rb >> 2) & 0xFF00FF) | ((ag << 6) & 0xFF00FF00); |
| 903 | } |
| 904 | |
| 905 | static inline uint32_t expand16(U16CPU c) { |
| 906 | return (c & ~SK_G16_MASK_IN_PLACE) | ((c & SK_G16_MASK_IN_PLACE) << 16); |
| 907 | } |
| 908 | |
| 909 | // returns dirt in the top 16bits, but we don't care, since we only |
| 910 | // store the low 16bits. |
| 911 | static inline U16CPU pack16(uint32_t c) { |
| 912 | return (c & ~SK_G16_MASK_IN_PLACE) | ((c >> 16) & SK_G16_MASK_IN_PLACE); |
| 913 | } |
| 914 | |
| 915 | static void downsampleby2_proc16(SkBitmap* dst, int x, int y, |
| 916 | const SkBitmap& src) { |
| 917 | x <<= 1; |
| 918 | y <<= 1; |
| 919 | const uint16_t* p = src.getAddr16(x, y); |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 920 | const uint16_t* baseP = p; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 921 | SkPMColor c; |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 922 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 923 | c = expand16(*p); |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 924 | if (x < src.width() - 1) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 925 | p += 1; |
| 926 | } |
| 927 | c += expand16(*p); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 928 | |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 929 | p = baseP; |
| 930 | if (y < src.height() - 1) { |
| 931 | p += src.rowBytes() >> 1; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 932 | } |
| 933 | c += expand16(*p); |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 934 | if (x < src.width() - 1) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 935 | p += 1; |
| 936 | } |
| 937 | c += expand16(*p); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 938 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 939 | *dst->getAddr16(x >> 1, y >> 1) = (uint16_t)pack16(c >> 2); |
| 940 | } |
| 941 | |
| 942 | static uint32_t expand4444(U16CPU c) { |
| 943 | return (c & 0xF0F) | ((c & ~0xF0F) << 12); |
| 944 | } |
| 945 | |
| 946 | static U16CPU collaps4444(uint32_t c) { |
| 947 | return (c & 0xF0F) | ((c >> 12) & ~0xF0F); |
| 948 | } |
| 949 | |
| 950 | static void downsampleby2_proc4444(SkBitmap* dst, int x, int y, |
| 951 | const SkBitmap& src) { |
| 952 | x <<= 1; |
| 953 | y <<= 1; |
| 954 | const uint16_t* p = src.getAddr16(x, y); |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 955 | const uint16_t* baseP = p; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 956 | uint32_t c; |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 957 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 958 | c = expand4444(*p); |
| 959 | if (x < src.width() - 1) { |
| 960 | p += 1; |
| 961 | } |
| 962 | c += expand4444(*p); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 963 | |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 964 | p = baseP; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 965 | if (y < src.height() - 1) { |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 966 | p += src.rowBytes() >> 1; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 967 | } |
| 968 | c += expand4444(*p); |
| 969 | if (x < src.width() - 1) { |
| 970 | p += 1; |
| 971 | } |
| 972 | c += expand4444(*p); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 973 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 974 | *dst->getAddr16(x >> 1, y >> 1) = (uint16_t)collaps4444(c >> 2); |
| 975 | } |
| 976 | |
| 977 | void SkBitmap::buildMipMap(bool forceRebuild) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 978 | if (forceRebuild) |
| 979 | this->freeMipMap(); |
| 980 | else if (fMipMap) |
| 981 | return; // we're already built |
| 982 | |
| 983 | SkASSERT(NULL == fMipMap); |
| 984 | |
| 985 | void (*proc)(SkBitmap* dst, int x, int y, const SkBitmap& src); |
| 986 | |
| 987 | const SkBitmap::Config config = this->getConfig(); |
| 988 | |
| 989 | switch (config) { |
| 990 | case kARGB_8888_Config: |
| 991 | proc = downsampleby2_proc32; |
| 992 | break; |
| 993 | case kRGB_565_Config: |
| 994 | proc = downsampleby2_proc16; |
| 995 | break; |
| 996 | case kARGB_4444_Config: |
| 997 | proc = downsampleby2_proc4444; |
| 998 | break; |
| 999 | case kIndex8_Config: |
| 1000 | case kA8_Config: |
| 1001 | default: |
| 1002 | return; // don't build mipmaps for these configs |
| 1003 | } |
reed@android.com | 89bb83a | 2009-05-29 21:30:42 +0000 | [diff] [blame] | 1004 | |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 1005 | SkAutoLockPixels alp(*this); |
| 1006 | if (!this->readyToDraw()) { |
| 1007 | return; |
| 1008 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1009 | |
| 1010 | // whip through our loop to compute the exact size needed |
| 1011 | size_t size = 0; |
| 1012 | int maxLevels = 0; |
| 1013 | { |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 1014 | int width = this->width(); |
| 1015 | int height = this->height(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1016 | for (;;) { |
| 1017 | width >>= 1; |
| 1018 | height >>= 1; |
| 1019 | if (0 == width || 0 == height) { |
| 1020 | break; |
| 1021 | } |
| 1022 | size += ComputeRowBytes(config, width) * height; |
| 1023 | maxLevels += 1; |
| 1024 | } |
| 1025 | } |
reed@android.com | 89bb83a | 2009-05-29 21:30:42 +0000 | [diff] [blame] | 1026 | |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 1027 | // nothing to build |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1028 | if (0 == maxLevels) { |
| 1029 | return; |
| 1030 | } |
| 1031 | |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 1032 | SkBitmap srcBM(*this); |
| 1033 | srcBM.lockPixels(); |
| 1034 | if (!srcBM.readyToDraw()) { |
| 1035 | return; |
| 1036 | } |
| 1037 | |
| 1038 | MipMap* mm = MipMap::Alloc(maxLevels, size); |
| 1039 | if (NULL == mm) { |
| 1040 | return; |
| 1041 | } |
| 1042 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1043 | MipLevel* level = mm->levels(); |
| 1044 | uint8_t* addr = (uint8_t*)mm->pixels(); |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 1045 | int width = this->width(); |
| 1046 | int height = this->height(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1047 | unsigned rowBytes = this->rowBytes(); |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 1048 | SkBitmap dstBM; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1049 | |
| 1050 | for (int i = 0; i < maxLevels; i++) { |
| 1051 | width >>= 1; |
| 1052 | height >>= 1; |
| 1053 | rowBytes = ComputeRowBytes(config, width); |
| 1054 | |
| 1055 | level[i].fPixels = addr; |
reed@android.com | f459a49 | 2009-03-27 12:33:50 +0000 | [diff] [blame] | 1056 | level[i].fWidth = width; |
| 1057 | level[i].fHeight = height; |
reed@android.com | 49f0ff2 | 2009-03-19 21:52:42 +0000 | [diff] [blame] | 1058 | level[i].fRowBytes = rowBytes; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1059 | |
| 1060 | dstBM.setConfig(config, width, height, rowBytes); |
| 1061 | dstBM.setPixels(addr); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1062 | |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 1063 | for (int y = 0; y < height; y++) { |
| 1064 | for (int x = 0; x < width; x++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1065 | proc(&dstBM, x, y, srcBM); |
| 1066 | } |
| 1067 | } |
| 1068 | |
| 1069 | srcBM = dstBM; |
| 1070 | addr += height * rowBytes; |
| 1071 | } |
| 1072 | SkASSERT(addr == (uint8_t*)mm->pixels() + size); |
| 1073 | fMipMap = mm; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1074 | } |
| 1075 | |
| 1076 | bool SkBitmap::hasMipMap() const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1077 | return fMipMap != NULL; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1078 | } |
| 1079 | |
| 1080 | int SkBitmap::extractMipLevel(SkBitmap* dst, SkFixed sx, SkFixed sy) { |
reed@android.com | 83f7bc3 | 2009-07-17 02:42:41 +0000 | [diff] [blame] | 1081 | if (NULL == fMipMap) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1082 | return 0; |
reed@android.com | 83f7bc3 | 2009-07-17 02:42:41 +0000 | [diff] [blame] | 1083 | } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1084 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1085 | int level = ComputeMipLevel(sx, sy) >> 16; |
| 1086 | SkASSERT(level >= 0); |
| 1087 | if (level <= 0) { |
| 1088 | return 0; |
| 1089 | } |
| 1090 | |
| 1091 | if (level >= fMipMap->fLevelCount) { |
| 1092 | level = fMipMap->fLevelCount - 1; |
| 1093 | } |
| 1094 | if (dst) { |
| 1095 | const MipLevel& mip = fMipMap->levels()[level - 1]; |
| 1096 | dst->setConfig((SkBitmap::Config)this->config(), |
| 1097 | mip.fWidth, mip.fHeight, mip.fRowBytes); |
| 1098 | dst->setPixels(mip.fPixels); |
| 1099 | } |
| 1100 | return level; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1101 | } |
| 1102 | |
| 1103 | SkFixed SkBitmap::ComputeMipLevel(SkFixed sx, SkFixed sy) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1104 | sx = SkAbs32(sx); |
| 1105 | sy = SkAbs32(sy); |
| 1106 | if (sx < sy) { |
| 1107 | sx = sy; |
| 1108 | } |
| 1109 | if (sx < SK_Fixed1) { |
| 1110 | return 0; |
| 1111 | } |
| 1112 | int clz = SkCLZ(sx); |
| 1113 | SkASSERT(clz >= 1 && clz <= 15); |
| 1114 | return SkIntToFixed(15 - clz) + ((unsigned)(sx << (clz + 1)) >> 16); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1115 | } |
| 1116 | |
| 1117 | /////////////////////////////////////////////////////////////////////////////// |
| 1118 | |
reed@android.com | 1cdcb51 | 2009-08-24 19:11:00 +0000 | [diff] [blame] | 1119 | static bool GetBitmapAlpha(const SkBitmap& src, uint8_t SK_RESTRICT alpha[], |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1120 | int alphaRowBytes) { |
| 1121 | SkASSERT(alpha != NULL); |
| 1122 | SkASSERT(alphaRowBytes >= src.width()); |
| 1123 | |
| 1124 | SkBitmap::Config config = src.getConfig(); |
| 1125 | int w = src.width(); |
| 1126 | int h = src.height(); |
| 1127 | int rb = src.rowBytes(); |
| 1128 | |
reed@android.com | 1cdcb51 | 2009-08-24 19:11:00 +0000 | [diff] [blame] | 1129 | SkAutoLockPixels alp(src); |
| 1130 | if (!src.readyToDraw()) { |
| 1131 | // zero out the alpha buffer and return |
| 1132 | while (--h >= 0) { |
| 1133 | memset(alpha, 0, w); |
| 1134 | alpha += alphaRowBytes; |
| 1135 | } |
| 1136 | return false; |
| 1137 | } |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 1138 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1139 | if (SkBitmap::kA8_Config == config && !src.isOpaque()) { |
| 1140 | const uint8_t* s = src.getAddr8(0, 0); |
| 1141 | while (--h >= 0) { |
| 1142 | memcpy(alpha, s, w); |
| 1143 | s += rb; |
| 1144 | alpha += alphaRowBytes; |
| 1145 | } |
| 1146 | } else if (SkBitmap::kARGB_8888_Config == config && !src.isOpaque()) { |
| 1147 | const SkPMColor* SK_RESTRICT s = src.getAddr32(0, 0); |
| 1148 | while (--h >= 0) { |
| 1149 | for (int x = 0; x < w; x++) { |
| 1150 | alpha[x] = SkGetPackedA32(s[x]); |
| 1151 | } |
| 1152 | s = (const SkPMColor*)((const char*)s + rb); |
| 1153 | alpha += alphaRowBytes; |
| 1154 | } |
| 1155 | } else if (SkBitmap::kARGB_4444_Config == config && !src.isOpaque()) { |
| 1156 | const SkPMColor16* SK_RESTRICT s = src.getAddr16(0, 0); |
| 1157 | while (--h >= 0) { |
| 1158 | for (int x = 0; x < w; x++) { |
| 1159 | alpha[x] = SkPacked4444ToA32(s[x]); |
| 1160 | } |
| 1161 | s = (const SkPMColor16*)((const char*)s + rb); |
| 1162 | alpha += alphaRowBytes; |
| 1163 | } |
| 1164 | } else if (SkBitmap::kIndex8_Config == config && !src.isOpaque()) { |
| 1165 | SkColorTable* ct = src.getColorTable(); |
| 1166 | if (ct) { |
| 1167 | const SkPMColor* SK_RESTRICT table = ct->lockColors(); |
| 1168 | const uint8_t* SK_RESTRICT s = src.getAddr8(0, 0); |
| 1169 | while (--h >= 0) { |
| 1170 | for (int x = 0; x < w; x++) { |
| 1171 | alpha[x] = SkGetPackedA32(table[s[x]]); |
| 1172 | } |
| 1173 | s += rb; |
| 1174 | alpha += alphaRowBytes; |
| 1175 | } |
| 1176 | ct->unlockColors(false); |
| 1177 | } |
| 1178 | } else { // src is opaque, so just fill alpha[] with 0xFF |
| 1179 | memset(alpha, 0xFF, h * alphaRowBytes); |
| 1180 | } |
reed@android.com | 1cdcb51 | 2009-08-24 19:11:00 +0000 | [diff] [blame] | 1181 | return true; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1182 | } |
| 1183 | |
| 1184 | #include "SkPaint.h" |
| 1185 | #include "SkMaskFilter.h" |
| 1186 | #include "SkMatrix.h" |
| 1187 | |
| 1188 | void SkBitmap::extractAlpha(SkBitmap* dst, const SkPaint* paint, |
| 1189 | SkIPoint* offset) const { |
| 1190 | SkDEBUGCODE(this->validate();) |
| 1191 | |
| 1192 | SkMatrix identity; |
| 1193 | SkMask srcM, dstM; |
| 1194 | |
| 1195 | srcM.fBounds.set(0, 0, this->width(), this->height()); |
| 1196 | srcM.fRowBytes = SkAlign4(this->width()); |
| 1197 | srcM.fFormat = SkMask::kA8_Format; |
| 1198 | |
| 1199 | SkMaskFilter* filter = paint ? paint->getMaskFilter() : NULL; |
| 1200 | |
| 1201 | // compute our (larger?) dst bounds if we have a filter |
| 1202 | if (NULL != filter) { |
| 1203 | identity.reset(); |
| 1204 | srcM.fImage = NULL; |
| 1205 | if (!filter->filterMask(&dstM, srcM, identity, NULL)) { |
| 1206 | goto NO_FILTER_CASE; |
| 1207 | } |
| 1208 | dstM.fRowBytes = SkAlign4(dstM.fBounds.width()); |
| 1209 | } else { |
| 1210 | NO_FILTER_CASE: |
| 1211 | dst->setConfig(SkBitmap::kA8_Config, this->width(), this->height(), |
| 1212 | srcM.fRowBytes); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1213 | dst->allocPixels(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1214 | GetBitmapAlpha(*this, dst->getAddr8(0, 0), srcM.fRowBytes); |
| 1215 | if (offset) { |
| 1216 | offset->set(0, 0); |
| 1217 | } |
| 1218 | return; |
| 1219 | } |
| 1220 | |
| 1221 | SkAutoMaskImage srcCleanup(&srcM, true); |
| 1222 | |
| 1223 | GetBitmapAlpha(*this, srcM.fImage, srcM.fRowBytes); |
| 1224 | if (!filter->filterMask(&dstM, srcM, identity, NULL)) { |
| 1225 | goto NO_FILTER_CASE; |
| 1226 | } |
| 1227 | |
| 1228 | SkAutoMaskImage dstCleanup(&dstM, false); |
| 1229 | |
| 1230 | dst->setConfig(SkBitmap::kA8_Config, dstM.fBounds.width(), |
| 1231 | dstM.fBounds.height(), dstM.fRowBytes); |
| 1232 | dst->allocPixels(); |
| 1233 | memcpy(dst->getPixels(), dstM.fImage, dstM.computeImageSize()); |
| 1234 | if (offset) { |
| 1235 | offset->set(dstM.fBounds.fLeft, dstM.fBounds.fTop); |
| 1236 | } |
| 1237 | SkDEBUGCODE(dst->validate();) |
| 1238 | } |
| 1239 | |
| 1240 | /////////////////////////////////////////////////////////////////////////////// |
| 1241 | |
| 1242 | enum { |
| 1243 | SERIALIZE_PIXELTYPE_NONE, |
| 1244 | SERIALIZE_PIXELTYPE_RAW_WITH_CTABLE, |
| 1245 | SERIALIZE_PIXELTYPE_RAW_NO_CTABLE, |
| 1246 | SERIALIZE_PIXELTYPE_REF_DATA, |
| 1247 | SERIALIZE_PIXELTYPE_REF_PTR, |
| 1248 | }; |
| 1249 | |
| 1250 | static void writeString(SkFlattenableWriteBuffer& buffer, const char str[]) { |
| 1251 | size_t len = strlen(str); |
| 1252 | buffer.write32(len); |
| 1253 | buffer.writePad(str, len); |
| 1254 | } |
| 1255 | |
| 1256 | static SkPixelRef::Factory deserialize_factory(SkFlattenableReadBuffer& buffer) { |
| 1257 | size_t len = buffer.readInt(); |
| 1258 | SkAutoSMalloc<256> storage(len + 1); |
| 1259 | char* str = (char*)storage.get(); |
| 1260 | buffer.read(str, len); |
| 1261 | str[len] = 0; |
| 1262 | return SkPixelRef::NameToFactory(str); |
| 1263 | } |
| 1264 | |
| 1265 | /* |
| 1266 | It is tricky to know how much to flatten. If we don't have a pixelref (i.e. |
| 1267 | we just have pixels, then we can only flatten the pixels, or write out an |
| 1268 | empty bitmap. |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1269 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1270 | With a pixelref, we still have the question of recognizing when two sitings |
| 1271 | of the same pixelref are the same, and when they are different. Perhaps we |
| 1272 | should look at the generationID and keep a record of that in some dictionary |
| 1273 | associated with the buffer. SkGLTextureCache does this sort of thing to know |
| 1274 | when to create a new texture. |
| 1275 | */ |
| 1276 | void SkBitmap::flatten(SkFlattenableWriteBuffer& buffer) const { |
| 1277 | buffer.write32(fWidth); |
| 1278 | buffer.write32(fHeight); |
| 1279 | buffer.write32(fRowBytes); |
| 1280 | buffer.write8(fConfig); |
| 1281 | buffer.writeBool(this->isOpaque()); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1282 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1283 | /* If we are called in this mode, then it is up to the caller to manage |
| 1284 | the owner-counts on the pixelref, as we just record the ptr itself. |
| 1285 | */ |
| 1286 | if (!buffer.persistBitmapPixels()) { |
| 1287 | if (fPixelRef) { |
| 1288 | buffer.write8(SERIALIZE_PIXELTYPE_REF_PTR); |
| 1289 | buffer.write32(fPixelRefOffset); |
| 1290 | buffer.writeRefCnt(fPixelRef); |
| 1291 | return; |
| 1292 | } else { |
| 1293 | // we ignore the non-persist request, since we don't have a ref |
| 1294 | // ... or we could just write an empty bitmap... |
| 1295 | // (true) will write an empty bitmap, (false) will flatten the pix |
| 1296 | if (true) { |
| 1297 | buffer.write8(SERIALIZE_PIXELTYPE_NONE); |
| 1298 | return; |
| 1299 | } |
| 1300 | } |
| 1301 | } |
| 1302 | |
| 1303 | if (fPixelRef) { |
| 1304 | SkPixelRef::Factory fact = fPixelRef->getFactory(); |
| 1305 | if (fact) { |
| 1306 | const char* name = SkPixelRef::FactoryToName(fact); |
| 1307 | if (name && *name) { |
| 1308 | buffer.write8(SERIALIZE_PIXELTYPE_REF_DATA); |
| 1309 | buffer.write32(fPixelRefOffset); |
| 1310 | writeString(buffer, name); |
| 1311 | fPixelRef->flatten(buffer); |
| 1312 | return; |
| 1313 | } |
| 1314 | } |
| 1315 | // if we get here, we can't record the pixels |
| 1316 | buffer.write8(SERIALIZE_PIXELTYPE_NONE); |
| 1317 | } else if (fPixels) { |
| 1318 | if (fColorTable) { |
| 1319 | buffer.write8(SERIALIZE_PIXELTYPE_RAW_WITH_CTABLE); |
| 1320 | fColorTable->flatten(buffer); |
| 1321 | } else { |
| 1322 | buffer.write8(SERIALIZE_PIXELTYPE_RAW_NO_CTABLE); |
| 1323 | } |
| 1324 | buffer.writePad(fPixels, this->getSize()); |
| 1325 | } else { |
| 1326 | buffer.write8(SERIALIZE_PIXELTYPE_NONE); |
| 1327 | } |
| 1328 | } |
| 1329 | |
| 1330 | void SkBitmap::unflatten(SkFlattenableReadBuffer& buffer) { |
| 1331 | this->reset(); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1332 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1333 | int width = buffer.readInt(); |
| 1334 | int height = buffer.readInt(); |
| 1335 | int rowBytes = buffer.readInt(); |
| 1336 | int config = buffer.readU8(); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1337 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1338 | this->setConfig((Config)config, width, height, rowBytes); |
| 1339 | this->setIsOpaque(buffer.readBool()); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1340 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1341 | size_t size = this->getSize(); |
| 1342 | int reftype = buffer.readU8(); |
| 1343 | switch (reftype) { |
| 1344 | case SERIALIZE_PIXELTYPE_REF_PTR: { |
| 1345 | size_t offset = buffer.readU32(); |
| 1346 | SkPixelRef* pr = (SkPixelRef*)buffer.readRefCnt(); |
| 1347 | this->setPixelRef(pr, offset); |
| 1348 | break; |
| 1349 | } |
| 1350 | case SERIALIZE_PIXELTYPE_REF_DATA: { |
| 1351 | size_t offset = buffer.readU32(); |
| 1352 | SkPixelRef::Factory fact = deserialize_factory(buffer); |
| 1353 | SkPixelRef* pr = fact(buffer); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 1354 | SkSafeUnref(this->setPixelRef(pr, offset)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1355 | break; |
| 1356 | } |
| 1357 | case SERIALIZE_PIXELTYPE_RAW_WITH_CTABLE: |
| 1358 | case SERIALIZE_PIXELTYPE_RAW_NO_CTABLE: { |
| 1359 | SkColorTable* ctable = NULL; |
| 1360 | if (SERIALIZE_PIXELTYPE_RAW_WITH_CTABLE == reftype) { |
| 1361 | ctable = SkNEW_ARGS(SkColorTable, (buffer)); |
| 1362 | } |
| 1363 | if (this->allocPixels(ctable)) { |
| 1364 | this->lockPixels(); |
wjmaclean@chromium.org | 0bde180 | 2010-12-22 17:43:54 +0000 | [diff] [blame] | 1365 | buffer.read(this->getPixels(), this->getSafeSize()); // Just read what we need. |
| 1366 | buffer.skip(size - this->getSafeSize()); // Keep aligned for subsequent reads. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1367 | this->unlockPixels(); |
| 1368 | } else { |
wjmaclean@chromium.org | 0bde180 | 2010-12-22 17:43:54 +0000 | [diff] [blame] | 1369 | buffer.skip(size); // Still skip the full-sized buffer though. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1370 | } |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 1371 | SkSafeUnref(ctable); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1372 | break; |
| 1373 | } |
| 1374 | case SERIALIZE_PIXELTYPE_NONE: |
| 1375 | break; |
| 1376 | default: |
| 1377 | SkASSERT(!"unrecognized pixeltype in serialized data"); |
| 1378 | sk_throw(); |
| 1379 | } |
| 1380 | } |
| 1381 | |
| 1382 | /////////////////////////////////////////////////////////////////////////////// |
| 1383 | |
| 1384 | SkBitmap::RLEPixels::RLEPixels(int width, int height) { |
| 1385 | fHeight = height; |
| 1386 | fYPtrs = (uint8_t**)sk_malloc_throw(height * sizeof(uint8_t*)); |
reed@android.com | 4516f47 | 2009-06-29 16:25:36 +0000 | [diff] [blame] | 1387 | sk_bzero(fYPtrs, height * sizeof(uint8_t*)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1388 | } |
| 1389 | |
| 1390 | SkBitmap::RLEPixels::~RLEPixels() { |
| 1391 | sk_free(fYPtrs); |
| 1392 | } |
| 1393 | |
| 1394 | /////////////////////////////////////////////////////////////////////////////// |
| 1395 | |
| 1396 | #ifdef SK_DEBUG |
| 1397 | void SkBitmap::validate() const { |
| 1398 | SkASSERT(fConfig < kConfigCount); |
| 1399 | SkASSERT(fRowBytes >= (unsigned)ComputeRowBytes((Config)fConfig, fWidth)); |
| 1400 | SkASSERT(fFlags <= kImageIsOpaque_Flag); |
| 1401 | SkASSERT(fPixelLockCount >= 0); |
| 1402 | SkASSERT(NULL == fColorTable || (unsigned)fColorTable->getRefCnt() < 10000); |
| 1403 | SkASSERT((uint8_t)ComputeBytesPerPixel((Config)fConfig) == fBytesPerPixel); |
| 1404 | |
| 1405 | #if 0 // these asserts are not thread-correct, so disable for now |
| 1406 | if (fPixelRef) { |
| 1407 | if (fPixelLockCount > 0) { |
| 1408 | SkASSERT(fPixelRef->getLockCount() > 0); |
| 1409 | } else { |
| 1410 | SkASSERT(NULL == fPixels); |
| 1411 | SkASSERT(NULL == fColorTable); |
| 1412 | } |
| 1413 | } |
| 1414 | #endif |
| 1415 | } |
| 1416 | #endif |
| 1417 | |