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" |
vandebo@chromium.org | 112706d | 2011-02-24 22:50:55 +0000 | [diff] [blame] | 25 | #include "SkUnPreMultiply.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 26 | #include "SkUtils.h" |
| 27 | #include "SkPackBits.h" |
| 28 | #include <new> |
| 29 | |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 30 | static bool isPos32Bits(const Sk64& value) { |
| 31 | return !value.isNeg() && value.is32(); |
| 32 | } |
| 33 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 34 | struct MipLevel { |
| 35 | void* fPixels; |
| 36 | uint32_t fRowBytes; |
reed@android.com | f459a49 | 2009-03-27 12:33:50 +0000 | [diff] [blame] | 37 | uint32_t fWidth, fHeight; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 38 | }; |
| 39 | |
| 40 | struct SkBitmap::MipMap : SkNoncopyable { |
| 41 | int32_t fRefCnt; |
| 42 | int fLevelCount; |
| 43 | // MipLevel fLevel[fLevelCount]; |
| 44 | // Pixels[] |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 45 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 46 | static MipMap* Alloc(int levelCount, size_t pixelSize) { |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 47 | if (levelCount < 0) { |
| 48 | return NULL; |
| 49 | } |
| 50 | Sk64 size; |
| 51 | size.setMul(levelCount + 1, sizeof(MipLevel)); |
| 52 | size.add(sizeof(MipMap)); |
| 53 | size.add(pixelSize); |
| 54 | if (!isPos32Bits(size)) { |
| 55 | return NULL; |
| 56 | } |
| 57 | MipMap* mm = (MipMap*)sk_malloc_throw(size.get32()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 58 | mm->fRefCnt = 1; |
| 59 | mm->fLevelCount = levelCount; |
| 60 | return mm; |
| 61 | } |
| 62 | |
| 63 | const MipLevel* levels() const { return (const MipLevel*)(this + 1); } |
| 64 | MipLevel* levels() { return (MipLevel*)(this + 1); } |
| 65 | |
| 66 | const void* pixels() const { return levels() + fLevelCount; } |
| 67 | void* pixels() { return levels() + fLevelCount; } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 68 | |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 69 | void ref() { |
| 70 | if (SK_MaxS32 == sk_atomic_inc(&fRefCnt)) { |
| 71 | sk_throw(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 72 | } |
| 73 | } |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 74 | void unref() { |
| 75 | SkASSERT(fRefCnt > 0); |
| 76 | if (sk_atomic_dec(&fRefCnt) == 1) { |
| 77 | sk_free(this); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 78 | } |
| 79 | } |
| 80 | }; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 81 | |
| 82 | /////////////////////////////////////////////////////////////////////////////// |
| 83 | /////////////////////////////////////////////////////////////////////////////// |
| 84 | |
| 85 | SkBitmap::SkBitmap() { |
reed@android.com | 4516f47 | 2009-06-29 16:25:36 +0000 | [diff] [blame] | 86 | sk_bzero(this, sizeof(*this)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 87 | } |
| 88 | |
| 89 | SkBitmap::SkBitmap(const SkBitmap& src) { |
| 90 | SkDEBUGCODE(src.validate();) |
reed@android.com | 4516f47 | 2009-06-29 16:25:36 +0000 | [diff] [blame] | 91 | sk_bzero(this, sizeof(*this)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 92 | *this = src; |
| 93 | SkDEBUGCODE(this->validate();) |
| 94 | } |
| 95 | |
| 96 | SkBitmap::~SkBitmap() { |
| 97 | SkDEBUGCODE(this->validate();) |
| 98 | this->freePixels(); |
| 99 | } |
| 100 | |
| 101 | SkBitmap& SkBitmap::operator=(const SkBitmap& src) { |
| 102 | if (this != &src) { |
| 103 | this->freePixels(); |
| 104 | memcpy(this, &src, sizeof(src)); |
| 105 | |
| 106 | // inc src reference counts |
reed@android.com | 83f7bc3 | 2009-07-17 02:42:41 +0000 | [diff] [blame] | 107 | SkSafeRef(src.fPixelRef); |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 108 | SkSafeRef(src.fMipMap); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 109 | |
| 110 | // we reset our locks if we get blown away |
| 111 | fPixelLockCount = 0; |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 112 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 113 | /* The src could be in 3 states |
| 114 | 1. no pixelref, in which case we just copy/ref the pixels/ctable |
| 115 | 2. unlocked pixelref, pixels/ctable should be null |
| 116 | 3. locked pixelref, we should lock the ref again ourselves |
| 117 | */ |
| 118 | if (NULL == fPixelRef) { |
| 119 | // leave fPixels as it is |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 120 | SkSafeRef(fColorTable); // ref the user's ctable if present |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 121 | } else { // we have a pixelref, so pixels/ctable reflect it |
| 122 | // ignore the values from the memcpy |
| 123 | fPixels = NULL; |
| 124 | fColorTable = NULL; |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | SkDEBUGCODE(this->validate();) |
| 129 | return *this; |
| 130 | } |
| 131 | |
| 132 | void SkBitmap::swap(SkBitmap& other) { |
| 133 | SkTSwap<SkColorTable*>(fColorTable, other.fColorTable); |
| 134 | SkTSwap<SkPixelRef*>(fPixelRef, other.fPixelRef); |
| 135 | SkTSwap<size_t>(fPixelRefOffset, other.fPixelRefOffset); |
| 136 | SkTSwap<int>(fPixelLockCount, other.fPixelLockCount); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 137 | SkTSwap<MipMap*>(fMipMap, other.fMipMap); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 138 | SkTSwap<void*>(fPixels, other.fPixels); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 139 | SkTSwap<uint32_t>(fRowBytes, other.fRowBytes); |
reed@android.com | f459a49 | 2009-03-27 12:33:50 +0000 | [diff] [blame] | 140 | SkTSwap<uint32_t>(fWidth, other.fWidth); |
| 141 | SkTSwap<uint32_t>(fHeight, other.fHeight); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 142 | SkTSwap<uint8_t>(fConfig, other.fConfig); |
| 143 | SkTSwap<uint8_t>(fFlags, other.fFlags); |
| 144 | SkTSwap<uint8_t>(fBytesPerPixel, other.fBytesPerPixel); |
| 145 | |
| 146 | SkDEBUGCODE(this->validate();) |
| 147 | } |
| 148 | |
| 149 | void SkBitmap::reset() { |
| 150 | this->freePixels(); |
reed@android.com | 4516f47 | 2009-06-29 16:25:36 +0000 | [diff] [blame] | 151 | sk_bzero(this, sizeof(*this)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 152 | } |
| 153 | |
| 154 | int SkBitmap::ComputeBytesPerPixel(SkBitmap::Config config) { |
| 155 | int bpp; |
| 156 | switch (config) { |
| 157 | case kNo_Config: |
| 158 | case kA1_Config: |
| 159 | bpp = 0; // not applicable |
| 160 | break; |
| 161 | case kRLE_Index8_Config: |
| 162 | case kA8_Config: |
| 163 | case kIndex8_Config: |
| 164 | bpp = 1; |
| 165 | break; |
| 166 | case kRGB_565_Config: |
| 167 | case kARGB_4444_Config: |
| 168 | bpp = 2; |
| 169 | break; |
| 170 | case kARGB_8888_Config: |
| 171 | bpp = 4; |
| 172 | break; |
| 173 | default: |
| 174 | SkASSERT(!"unknown config"); |
| 175 | bpp = 0; // error |
| 176 | break; |
| 177 | } |
| 178 | return bpp; |
| 179 | } |
| 180 | |
| 181 | int SkBitmap::ComputeRowBytes(Config c, int width) { |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 182 | if (width < 0) { |
| 183 | return 0; |
| 184 | } |
| 185 | |
| 186 | Sk64 rowBytes; |
| 187 | rowBytes.setZero(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 188 | |
| 189 | switch (c) { |
| 190 | case kNo_Config: |
| 191 | case kRLE_Index8_Config: |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 192 | break; |
| 193 | case kA1_Config: |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 194 | rowBytes.set(width); |
| 195 | rowBytes.add(7); |
| 196 | rowBytes.shiftRight(3); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 197 | break; |
| 198 | case kA8_Config: |
| 199 | case kIndex8_Config: |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 200 | rowBytes.set(width); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 201 | break; |
| 202 | case kRGB_565_Config: |
| 203 | case kARGB_4444_Config: |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 204 | rowBytes.set(width); |
| 205 | rowBytes.shiftLeft(1); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 206 | break; |
| 207 | case kARGB_8888_Config: |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 208 | rowBytes.set(width); |
| 209 | rowBytes.shiftLeft(2); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 210 | break; |
| 211 | default: |
| 212 | SkASSERT(!"unknown config"); |
| 213 | break; |
| 214 | } |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 215 | return isPos32Bits(rowBytes) ? rowBytes.get32() : 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 216 | } |
| 217 | |
| 218 | Sk64 SkBitmap::ComputeSize64(Config c, int width, int height) { |
| 219 | Sk64 size; |
| 220 | size.setMul(SkBitmap::ComputeRowBytes(c, width), height); |
| 221 | return size; |
| 222 | } |
| 223 | |
| 224 | size_t SkBitmap::ComputeSize(Config c, int width, int height) { |
| 225 | Sk64 size = SkBitmap::ComputeSize64(c, width, height); |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 226 | return isPos32Bits(size) ? size.get32() : 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 227 | } |
| 228 | |
wjmaclean@chromium.org | 86bff1f | 2010-11-16 20:22:41 +0000 | [diff] [blame] | 229 | Sk64 SkBitmap::ComputeSafeSize64(Config config, |
| 230 | uint32_t width, |
| 231 | uint32_t height, |
| 232 | uint32_t rowBytes) { |
| 233 | Sk64 safeSize; |
| 234 | safeSize.setZero(); |
| 235 | if (height > 0) { |
| 236 | safeSize.set(ComputeRowBytes(config, width)); |
| 237 | Sk64 sizeAllButLastRow; |
| 238 | sizeAllButLastRow.setMul(height - 1, rowBytes); |
| 239 | safeSize.add(sizeAllButLastRow); |
| 240 | } |
| 241 | SkASSERT(!safeSize.isNeg()); |
| 242 | return safeSize; |
| 243 | } |
| 244 | |
| 245 | size_t SkBitmap::ComputeSafeSize(Config config, |
| 246 | uint32_t width, |
| 247 | uint32_t height, |
| 248 | uint32_t rowBytes) { |
| 249 | Sk64 safeSize = ComputeSafeSize64(config, width, height, rowBytes); |
| 250 | return (safeSize.is32() ? safeSize.get32() : 0); |
| 251 | } |
| 252 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 253 | void SkBitmap::setConfig(Config c, int width, int height, int rowBytes) { |
| 254 | this->freePixels(); |
| 255 | |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 256 | if ((width | height | rowBytes) < 0) { |
agl@chromium.org | 6b8cb25 | 2009-06-01 23:52:37 +0000 | [diff] [blame] | 257 | goto err; |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 258 | } |
| 259 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 260 | if (rowBytes == 0) { |
| 261 | rowBytes = SkBitmap::ComputeRowBytes(c, width); |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 262 | if (0 == rowBytes && kNo_Config != c) { |
agl@chromium.org | 6b8cb25 | 2009-06-01 23:52:37 +0000 | [diff] [blame] | 263 | goto err; |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 264 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 265 | } |
reed@android.com | 89bb83a | 2009-05-29 21:30:42 +0000 | [diff] [blame] | 266 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 267 | fConfig = SkToU8(c); |
reed@android.com | f459a49 | 2009-03-27 12:33:50 +0000 | [diff] [blame] | 268 | fWidth = width; |
| 269 | fHeight = height; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 270 | fRowBytes = rowBytes; |
| 271 | |
| 272 | fBytesPerPixel = (uint8_t)ComputeBytesPerPixel(c); |
| 273 | |
| 274 | SkDEBUGCODE(this->validate();) |
reed@android.com | 9e0c2fc | 2009-06-02 18:54:28 +0000 | [diff] [blame] | 275 | return; |
agl@chromium.org | 6b8cb25 | 2009-06-01 23:52:37 +0000 | [diff] [blame] | 276 | |
reed@android.com | 9e0c2fc | 2009-06-02 18:54:28 +0000 | [diff] [blame] | 277 | // 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] | 278 | err: |
| 279 | this->reset(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | void SkBitmap::updatePixelsFromRef() const { |
| 283 | if (NULL != fPixelRef) { |
| 284 | if (fPixelLockCount > 0) { |
| 285 | SkASSERT(fPixelRef->getLockCount() > 0); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 286 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 287 | void* p = fPixelRef->pixels(); |
| 288 | if (NULL != p) { |
| 289 | p = (char*)p + fPixelRefOffset; |
| 290 | } |
| 291 | fPixels = p; |
| 292 | SkRefCnt_SafeAssign(fColorTable, fPixelRef->colorTable()); |
| 293 | } else { |
| 294 | SkASSERT(0 == fPixelLockCount); |
| 295 | fPixels = NULL; |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 296 | if (fColorTable) { |
| 297 | fColorTable->unref(); |
| 298 | fColorTable = NULL; |
| 299 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 300 | } |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | SkPixelRef* SkBitmap::setPixelRef(SkPixelRef* pr, size_t offset) { |
| 305 | // do this first, we that we never have a non-zero offset with a null ref |
| 306 | if (NULL == pr) { |
| 307 | offset = 0; |
| 308 | } |
| 309 | |
| 310 | if (fPixelRef != pr || fPixelRefOffset != offset) { |
| 311 | if (fPixelRef != pr) { |
| 312 | this->freePixels(); |
| 313 | SkASSERT(NULL == fPixelRef); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 314 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 315 | SkSafeRef(pr); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 316 | fPixelRef = pr; |
| 317 | } |
| 318 | fPixelRefOffset = offset; |
| 319 | this->updatePixelsFromRef(); |
| 320 | } |
| 321 | |
| 322 | SkDEBUGCODE(this->validate();) |
| 323 | return pr; |
| 324 | } |
| 325 | |
| 326 | void SkBitmap::lockPixels() const { |
| 327 | if (NULL != fPixelRef && 1 == ++fPixelLockCount) { |
| 328 | fPixelRef->lockPixels(); |
| 329 | this->updatePixelsFromRef(); |
| 330 | } |
| 331 | SkDEBUGCODE(this->validate();) |
| 332 | } |
| 333 | |
| 334 | void SkBitmap::unlockPixels() const { |
| 335 | SkASSERT(NULL == fPixelRef || fPixelLockCount > 0); |
| 336 | |
| 337 | if (NULL != fPixelRef && 0 == --fPixelLockCount) { |
| 338 | fPixelRef->unlockPixels(); |
| 339 | this->updatePixelsFromRef(); |
| 340 | } |
| 341 | SkDEBUGCODE(this->validate();) |
| 342 | } |
| 343 | |
| 344 | void SkBitmap::setPixels(void* p, SkColorTable* ctable) { |
| 345 | this->freePixels(); |
| 346 | fPixels = p; |
| 347 | SkRefCnt_SafeAssign(fColorTable, ctable); |
| 348 | |
| 349 | SkDEBUGCODE(this->validate();) |
| 350 | } |
| 351 | |
| 352 | bool SkBitmap::allocPixels(Allocator* allocator, SkColorTable* ctable) { |
| 353 | HeapAllocator stdalloc; |
| 354 | |
| 355 | if (NULL == allocator) { |
| 356 | allocator = &stdalloc; |
| 357 | } |
| 358 | return allocator->allocPixelRef(this, ctable); |
| 359 | } |
| 360 | |
| 361 | void SkBitmap::freePixels() { |
| 362 | // if we're gonna free the pixels, we certainly need to free the mipmap |
| 363 | this->freeMipMap(); |
| 364 | |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 365 | if (fColorTable) { |
| 366 | fColorTable->unref(); |
| 367 | fColorTable = NULL; |
| 368 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 369 | |
| 370 | if (NULL != fPixelRef) { |
| 371 | if (fPixelLockCount > 0) { |
| 372 | fPixelRef->unlockPixels(); |
| 373 | } |
| 374 | fPixelRef->unref(); |
| 375 | fPixelRef = NULL; |
| 376 | fPixelRefOffset = 0; |
| 377 | } |
| 378 | fPixelLockCount = 0; |
| 379 | fPixels = NULL; |
| 380 | } |
| 381 | |
| 382 | void SkBitmap::freeMipMap() { |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 383 | if (fMipMap) { |
| 384 | fMipMap->unref(); |
| 385 | fMipMap = NULL; |
| 386 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 387 | } |
| 388 | |
| 389 | uint32_t SkBitmap::getGenerationID() const { |
| 390 | return fPixelRef ? fPixelRef->getGenerationID() : 0; |
| 391 | } |
| 392 | |
| 393 | void SkBitmap::notifyPixelsChanged() const { |
| 394 | if (fPixelRef) { |
| 395 | fPixelRef->notifyPixelsChanged(); |
| 396 | } |
| 397 | } |
| 398 | |
reed@android.com | ce4e53a | 2010-09-09 16:01:26 +0000 | [diff] [blame] | 399 | SkGpuTexture* SkBitmap::getTexture() const { |
| 400 | return fPixelRef ? fPixelRef->getTexture() : NULL; |
| 401 | } |
| 402 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 403 | /////////////////////////////////////////////////////////////////////////////// |
| 404 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 405 | /** We explicitly use the same allocator for our pixels that SkMask does, |
| 406 | so that we can freely assign memory allocated by one class to the other. |
| 407 | */ |
| 408 | bool SkBitmap::HeapAllocator::allocPixelRef(SkBitmap* dst, |
| 409 | SkColorTable* ctable) { |
| 410 | Sk64 size = dst->getSize64(); |
| 411 | if (size.isNeg() || !size.is32()) { |
| 412 | return false; |
| 413 | } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 414 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 415 | void* addr = sk_malloc_flags(size.get32(), 0); // returns NULL on failure |
| 416 | if (NULL == addr) { |
| 417 | return false; |
| 418 | } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 419 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 420 | dst->setPixelRef(new SkMallocPixelRef(addr, size.get32(), ctable))->unref(); |
| 421 | // since we're already allocated, we lockPixels right away |
| 422 | dst->lockPixels(); |
| 423 | return true; |
| 424 | } |
| 425 | |
| 426 | /////////////////////////////////////////////////////////////////////////////// |
| 427 | |
wjmaclean@chromium.org | 86bff1f | 2010-11-16 20:22:41 +0000 | [diff] [blame] | 428 | size_t SkBitmap::getSafeSize() const { |
| 429 | // This is intended to be a size_t version of ComputeSafeSize64(), just |
| 430 | // faster. The computation is meant to be identical. |
| 431 | return (fHeight ? ((fHeight - 1) * fRowBytes) + |
| 432 | ComputeRowBytes(getConfig(), fWidth): 0); |
| 433 | } |
| 434 | |
| 435 | Sk64 SkBitmap::getSafeSize64() const { |
| 436 | return ComputeSafeSize64(getConfig(), fWidth, fHeight, fRowBytes); |
| 437 | } |
| 438 | |
| 439 | bool SkBitmap::copyPixelsTo(void* const dst, size_t dstSize, int dstRowBytes) |
| 440 | const { |
| 441 | |
| 442 | if (dstRowBytes == -1) |
| 443 | dstRowBytes = fRowBytes; |
| 444 | SkASSERT(dstRowBytes >= 0); |
| 445 | |
| 446 | if (getConfig() == kRLE_Index8_Config || |
| 447 | dstRowBytes < ComputeRowBytes(getConfig(), fWidth) || |
| 448 | dst == NULL || (getPixels() == NULL && pixelRef() == NULL)) |
| 449 | return false; |
| 450 | |
| 451 | if (static_cast<uint32_t>(dstRowBytes) == fRowBytes) { |
| 452 | size_t safeSize = getSafeSize(); |
| 453 | if (safeSize > dstSize || safeSize == 0) |
| 454 | return false; |
| 455 | else { |
| 456 | SkAutoLockPixels lock(*this); |
| 457 | // This implementation will write bytes beyond the end of each row, |
| 458 | // excluding the last row, if the bitmap's stride is greater than |
| 459 | // strictly required by the current config. |
| 460 | memcpy(dst, getPixels(), safeSize); |
| 461 | |
| 462 | return true; |
| 463 | } |
| 464 | } else { |
| 465 | // If destination has different stride than us, then copy line by line. |
| 466 | if (ComputeSafeSize(getConfig(), fWidth, fHeight, dstRowBytes) > |
| 467 | dstSize) |
| 468 | return false; |
| 469 | else { |
| 470 | // Just copy what we need on each line. |
| 471 | uint32_t rowBytes = ComputeRowBytes(getConfig(), fWidth); |
| 472 | SkAutoLockPixels lock(*this); |
| 473 | const uint8_t* srcP = reinterpret_cast<const uint8_t*>(getPixels()); |
| 474 | uint8_t* dstP = reinterpret_cast<uint8_t*>(dst); |
| 475 | for (uint32_t row = 0; row < fHeight; |
| 476 | row++, srcP += fRowBytes, dstP += dstRowBytes) { |
| 477 | memcpy(dstP, srcP, rowBytes); |
| 478 | } |
| 479 | |
| 480 | return true; |
| 481 | } |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | bool SkBitmap::copyPixelsFrom(const void* const src, size_t srcSize, |
| 486 | int srcRowBytes) { |
| 487 | |
| 488 | if (srcRowBytes == -1) |
| 489 | srcRowBytes = fRowBytes; |
| 490 | SkASSERT(srcRowBytes >= 0); |
| 491 | |
| 492 | size_t safeSize = getSafeSize(); |
| 493 | uint32_t rowBytes = ComputeRowBytes(getConfig(), fWidth); |
| 494 | if (getConfig() == kRLE_Index8_Config || src == NULL || |
| 495 | static_cast<uint32_t>(srcRowBytes) < rowBytes || |
| 496 | safeSize == 0 || |
| 497 | srcSize < ComputeSafeSize(getConfig(), fWidth, fHeight, srcRowBytes)) { |
| 498 | return false; |
| 499 | } |
| 500 | |
| 501 | SkAutoLockPixels lock(*this); |
| 502 | if (static_cast<uint32_t>(srcRowBytes) == fRowBytes) { |
| 503 | // This implementation will write bytes beyond the end of each row, |
| 504 | // excluding the last row, if the bitmap's stride is greater than |
| 505 | // strictly required by the current config. |
| 506 | memcpy(getPixels(), src, safeSize); |
| 507 | } else { |
| 508 | // Just copy the bytes we need on each line. |
| 509 | const uint8_t* srcP = reinterpret_cast<const uint8_t*>(src); |
| 510 | uint8_t* dstP = reinterpret_cast<uint8_t*>(getPixels()); |
| 511 | for (uint32_t row = 0; row < fHeight; |
| 512 | row++, srcP += srcRowBytes, dstP += fRowBytes) { |
| 513 | memcpy(dstP, srcP, rowBytes); |
| 514 | } |
| 515 | } |
| 516 | |
| 517 | return true; |
| 518 | } |
| 519 | |
| 520 | /////////////////////////////////////////////////////////////////////////////// |
| 521 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 522 | bool SkBitmap::isOpaque() const { |
| 523 | switch (fConfig) { |
| 524 | case kNo_Config: |
| 525 | return true; |
| 526 | |
| 527 | case kA1_Config: |
| 528 | case kA8_Config: |
| 529 | case kARGB_4444_Config: |
| 530 | case kARGB_8888_Config: |
| 531 | return (fFlags & kImageIsOpaque_Flag) != 0; |
| 532 | |
| 533 | case kIndex8_Config: |
| 534 | case kRLE_Index8_Config: { |
| 535 | uint32_t flags = 0; |
| 536 | |
| 537 | this->lockPixels(); |
| 538 | // if lockPixels failed, we may not have a ctable ptr |
| 539 | if (fColorTable) { |
| 540 | flags = fColorTable->getFlags(); |
| 541 | } |
| 542 | this->unlockPixels(); |
| 543 | |
| 544 | return (flags & SkColorTable::kColorsAreOpaque_Flag) != 0; |
| 545 | } |
| 546 | |
| 547 | case kRGB_565_Config: |
| 548 | return true; |
| 549 | |
| 550 | default: |
| 551 | SkASSERT(!"unknown bitmap config pased to isOpaque"); |
| 552 | return false; |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | void SkBitmap::setIsOpaque(bool isOpaque) { |
| 557 | /* we record this regardless of fConfig, though it is ignored in |
| 558 | isOpaque() for configs that can't support per-pixel alpha. |
| 559 | */ |
| 560 | if (isOpaque) { |
| 561 | fFlags |= kImageIsOpaque_Flag; |
| 562 | } else { |
| 563 | fFlags &= ~kImageIsOpaque_Flag; |
| 564 | } |
| 565 | } |
| 566 | |
| 567 | void* SkBitmap::getAddr(int x, int y) const { |
| 568 | SkASSERT((unsigned)x < (unsigned)this->width()); |
| 569 | SkASSERT((unsigned)y < (unsigned)this->height()); |
| 570 | |
| 571 | char* base = (char*)this->getPixels(); |
| 572 | if (base) { |
| 573 | base += y * this->rowBytes(); |
| 574 | switch (this->config()) { |
| 575 | case SkBitmap::kARGB_8888_Config: |
| 576 | base += x << 2; |
| 577 | break; |
| 578 | case SkBitmap::kARGB_4444_Config: |
| 579 | case SkBitmap::kRGB_565_Config: |
| 580 | base += x << 1; |
| 581 | break; |
| 582 | case SkBitmap::kA8_Config: |
| 583 | case SkBitmap::kIndex8_Config: |
| 584 | base += x; |
| 585 | break; |
| 586 | case SkBitmap::kA1_Config: |
| 587 | base += x >> 3; |
| 588 | break; |
| 589 | case kRLE_Index8_Config: |
| 590 | SkASSERT(!"Can't return addr for kRLE_Index8_Config"); |
| 591 | base = NULL; |
| 592 | break; |
| 593 | default: |
| 594 | SkASSERT(!"Can't return addr for config"); |
| 595 | base = NULL; |
| 596 | break; |
| 597 | } |
| 598 | } |
| 599 | return base; |
| 600 | } |
| 601 | |
vandebo@chromium.org | 112706d | 2011-02-24 22:50:55 +0000 | [diff] [blame] | 602 | SkColor SkBitmap::getColor(int x, int y) const { |
| 603 | SkASSERT((unsigned)x < (unsigned)this->width()); |
| 604 | SkASSERT((unsigned)y < (unsigned)this->height()); |
| 605 | |
| 606 | switch (this->config()) { |
| 607 | case SkBitmap::kA1_Config: { |
| 608 | uint8_t* addr = getAddr1(x, y); |
| 609 | uint8_t mask = 1 << (7 - (x % 8)); |
| 610 | if (addr[0] & mask) { |
| 611 | return SK_ColorBLACK; |
| 612 | } else { |
| 613 | return 0; |
| 614 | } |
| 615 | } |
| 616 | case SkBitmap::kA8_Config: { |
| 617 | uint8_t* addr = getAddr8(x, y); |
| 618 | return SkColorSetA(0, addr[0]); |
| 619 | } |
| 620 | case SkBitmap::kIndex8_Config: { |
| 621 | SkPMColor c = getIndex8Color(x, y); |
| 622 | return SkUnPreMultiply::PMColorToColor(c); |
| 623 | } |
| 624 | case SkBitmap::kRGB_565_Config: { |
| 625 | uint16_t* addr = getAddr16(x, y); |
| 626 | return SkPixel16ToColor(addr[0]); |
| 627 | } |
| 628 | case SkBitmap::kARGB_4444_Config: { |
| 629 | uint16_t* addr = getAddr16(x, y); |
| 630 | SkPMColor c = SkPixel4444ToPixel32(addr[0]); |
| 631 | return SkUnPreMultiply::PMColorToColor(c); |
| 632 | } |
| 633 | case SkBitmap::kARGB_8888_Config: { |
| 634 | uint32_t* addr = getAddr32(x, y); |
| 635 | return SkUnPreMultiply::PMColorToColor(addr[0]); |
| 636 | } |
| 637 | case kRLE_Index8_Config: { |
| 638 | uint8_t dst; |
| 639 | const SkBitmap::RLEPixels* rle = |
| 640 | (const SkBitmap::RLEPixels*) getPixels(); |
| 641 | SkPackBits::Unpack8(&dst, x, 1, rle->packedAtY(y)); |
| 642 | return SkUnPreMultiply::PMColorToColor((*fColorTable)[dst]); |
| 643 | } |
| 644 | case kNo_Config: |
| 645 | case kConfigCount: |
| 646 | SkASSERT(false); |
| 647 | return 0; |
| 648 | } |
| 649 | SkASSERT(false); // Not reached. |
| 650 | return 0; |
| 651 | } |
| 652 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 653 | /////////////////////////////////////////////////////////////////////////////// |
| 654 | /////////////////////////////////////////////////////////////////////////////// |
| 655 | |
| 656 | void SkBitmap::eraseARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b) const { |
| 657 | SkDEBUGCODE(this->validate();) |
| 658 | |
| 659 | if (0 == fWidth || 0 == fHeight || |
| 660 | kNo_Config == fConfig || kIndex8_Config == fConfig) { |
| 661 | return; |
| 662 | } |
| 663 | |
| 664 | SkAutoLockPixels alp(*this); |
| 665 | // perform this check after the lock call |
| 666 | if (!this->readyToDraw()) { |
| 667 | return; |
| 668 | } |
| 669 | |
| 670 | int height = fHeight; |
| 671 | const int width = fWidth; |
| 672 | const int rowBytes = fRowBytes; |
| 673 | |
| 674 | // make rgb premultiplied |
| 675 | if (255 != a) { |
| 676 | r = SkAlphaMul(r, a); |
| 677 | g = SkAlphaMul(g, a); |
| 678 | b = SkAlphaMul(b, a); |
| 679 | } |
| 680 | |
| 681 | switch (fConfig) { |
| 682 | case kA1_Config: { |
| 683 | uint8_t* p = (uint8_t*)fPixels; |
| 684 | const int count = (width + 7) >> 3; |
| 685 | a = (a >> 7) ? 0xFF : 0; |
| 686 | SkASSERT(count <= rowBytes); |
| 687 | while (--height >= 0) { |
| 688 | memset(p, a, count); |
| 689 | p += rowBytes; |
| 690 | } |
| 691 | break; |
| 692 | } |
| 693 | case kA8_Config: { |
| 694 | uint8_t* p = (uint8_t*)fPixels; |
| 695 | while (--height >= 0) { |
| 696 | memset(p, a, width); |
| 697 | p += rowBytes; |
| 698 | } |
| 699 | break; |
| 700 | } |
| 701 | case kARGB_4444_Config: |
| 702 | case kRGB_565_Config: { |
| 703 | uint16_t* p = (uint16_t*)fPixels; |
| 704 | uint16_t v; |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 705 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 706 | if (kARGB_4444_Config == fConfig) { |
| 707 | v = SkPackARGB4444(a >> 4, r >> 4, g >> 4, b >> 4); |
| 708 | } else { // kRGB_565_Config |
| 709 | v = SkPackRGB16(r >> (8 - SK_R16_BITS), g >> (8 - SK_G16_BITS), |
| 710 | b >> (8 - SK_B16_BITS)); |
| 711 | } |
| 712 | while (--height >= 0) { |
| 713 | sk_memset16(p, v, width); |
| 714 | p = (uint16_t*)((char*)p + rowBytes); |
| 715 | } |
| 716 | break; |
| 717 | } |
| 718 | case kARGB_8888_Config: { |
| 719 | uint32_t* p = (uint32_t*)fPixels; |
| 720 | uint32_t v = SkPackARGB32(a, r, g, b); |
| 721 | |
| 722 | while (--height >= 0) { |
| 723 | sk_memset32(p, v, width); |
| 724 | p = (uint32_t*)((char*)p + rowBytes); |
| 725 | } |
| 726 | break; |
| 727 | } |
| 728 | } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 729 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 730 | this->notifyPixelsChanged(); |
| 731 | } |
| 732 | |
| 733 | ////////////////////////////////////////////////////////////////////////////////////// |
| 734 | ////////////////////////////////////////////////////////////////////////////////////// |
| 735 | |
| 736 | #define SUB_OFFSET_FAILURE ((size_t)-1) |
| 737 | |
| 738 | static size_t getSubOffset(const SkBitmap& bm, int x, int y) { |
| 739 | SkASSERT((unsigned)x < (unsigned)bm.width()); |
| 740 | SkASSERT((unsigned)y < (unsigned)bm.height()); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 741 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 742 | switch (bm.getConfig()) { |
| 743 | case SkBitmap::kA8_Config: |
| 744 | case SkBitmap:: kIndex8_Config: |
| 745 | // x is fine as is for the calculation |
| 746 | break; |
| 747 | |
| 748 | case SkBitmap::kRGB_565_Config: |
| 749 | case SkBitmap::kARGB_4444_Config: |
| 750 | x <<= 1; |
| 751 | break; |
| 752 | |
| 753 | case SkBitmap::kARGB_8888_Config: |
| 754 | x <<= 2; |
| 755 | break; |
| 756 | |
| 757 | case SkBitmap::kNo_Config: |
| 758 | case SkBitmap::kA1_Config: |
| 759 | default: |
| 760 | return SUB_OFFSET_FAILURE; |
| 761 | } |
| 762 | return y * bm.rowBytes() + x; |
| 763 | } |
| 764 | |
| 765 | bool SkBitmap::extractSubset(SkBitmap* result, const SkIRect& subset) const { |
| 766 | SkDEBUGCODE(this->validate();) |
| 767 | |
| 768 | if (NULL == result || (NULL == fPixelRef && NULL == fPixels)) { |
| 769 | return false; // no src pixels |
| 770 | } |
| 771 | |
| 772 | SkIRect srcRect, r; |
| 773 | srcRect.set(0, 0, this->width(), this->height()); |
| 774 | if (!r.intersect(srcRect, subset)) { |
| 775 | return false; // r is empty (i.e. no intersection) |
| 776 | } |
| 777 | |
| 778 | if (kRLE_Index8_Config == fConfig) { |
| 779 | SkAutoLockPixels alp(*this); |
| 780 | // don't call readyToDraw(), since we can operate w/o a colortable |
| 781 | // at this stage |
| 782 | if (this->getPixels() == NULL) { |
| 783 | return false; |
| 784 | } |
| 785 | SkBitmap bm; |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 786 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 787 | bm.setConfig(kIndex8_Config, r.width(), r.height()); |
| 788 | bm.allocPixels(this->getColorTable()); |
| 789 | if (NULL == bm.getPixels()) { |
| 790 | return false; |
| 791 | } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 792 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 793 | const RLEPixels* rle = (const RLEPixels*)this->getPixels(); |
| 794 | uint8_t* dst = bm.getAddr8(0, 0); |
| 795 | const int width = bm.width(); |
| 796 | const int rowBytes = bm.rowBytes(); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 797 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 798 | for (int y = r.fTop; y < r.fBottom; y++) { |
| 799 | SkPackBits::Unpack8(dst, r.fLeft, width, rle->packedAtY(y)); |
| 800 | dst += rowBytes; |
| 801 | } |
| 802 | result->swap(bm); |
| 803 | return true; |
| 804 | } |
| 805 | |
| 806 | size_t offset = getSubOffset(*this, r.fLeft, r.fTop); |
| 807 | if (SUB_OFFSET_FAILURE == offset) { |
| 808 | return false; // config not supported |
| 809 | } |
| 810 | |
| 811 | SkBitmap dst; |
| 812 | dst.setConfig(this->config(), r.width(), r.height(), this->rowBytes()); |
| 813 | |
| 814 | if (fPixelRef) { |
| 815 | // share the pixelref with a custom offset |
| 816 | dst.setPixelRef(fPixelRef, fPixelRefOffset + offset); |
| 817 | } else { |
| 818 | // share the pixels (owned by the caller) |
| 819 | dst.setPixels((char*)fPixels + offset, this->getColorTable()); |
| 820 | } |
| 821 | SkDEBUGCODE(dst.validate();) |
| 822 | |
| 823 | // we know we're good, so commit to result |
| 824 | result->swap(dst); |
| 825 | return true; |
| 826 | } |
| 827 | |
| 828 | /////////////////////////////////////////////////////////////////////////////// |
| 829 | |
| 830 | #include "SkCanvas.h" |
| 831 | #include "SkPaint.h" |
| 832 | |
reed@android.com | fbaa88d | 2009-05-06 17:44:34 +0000 | [diff] [blame] | 833 | bool SkBitmap::canCopyTo(Config dstConfig) const { |
| 834 | if (this->getConfig() == kNo_Config) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 835 | return false; |
| 836 | } |
| 837 | |
reed@android.com | fbaa88d | 2009-05-06 17:44:34 +0000 | [diff] [blame] | 838 | bool sameConfigs = (this->config() == dstConfig); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 839 | switch (dstConfig) { |
| 840 | case kA8_Config: |
| 841 | case kARGB_4444_Config: |
| 842 | case kRGB_565_Config: |
| 843 | case kARGB_8888_Config: |
| 844 | break; |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 845 | case kA1_Config: |
| 846 | case kIndex8_Config: |
| 847 | if (!sameConfigs) { |
| 848 | return false; |
| 849 | } |
| 850 | break; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 851 | default: |
| 852 | return false; |
| 853 | } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 854 | |
| 855 | // do not copy src if srcConfig == kA1_Config while dstConfig != kA1_Config |
| 856 | if (this->getConfig() == kA1_Config && !sameConfigs) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 857 | return false; |
| 858 | } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 859 | |
reed@android.com | fbaa88d | 2009-05-06 17:44:34 +0000 | [diff] [blame] | 860 | return true; |
| 861 | } |
| 862 | |
| 863 | bool SkBitmap::copyTo(SkBitmap* dst, Config dstConfig, Allocator* alloc) const { |
| 864 | if (!this->canCopyTo(dstConfig)) { |
| 865 | return false; |
| 866 | } |
| 867 | |
reed@google.com | 50dfa01 | 2011-04-01 19:05:36 +0000 | [diff] [blame^] | 868 | // if we have a texture, first get those pixels |
| 869 | SkBitmap tmpSrc; |
| 870 | const SkBitmap* src = this; |
| 871 | |
| 872 | if (this->getTexture()) { |
| 873 | if (!fPixelRef->readPixels(&tmpSrc)) { |
| 874 | return false; |
| 875 | } |
| 876 | SkASSERT(tmpSrc.width() == this->width()); |
| 877 | SkASSERT(tmpSrc.height() == this->height()); |
| 878 | |
| 879 | // did we get lucky and we can just return tmpSrc? |
| 880 | if (tmpSrc.config() == dstConfig && NULL == alloc) { |
| 881 | dst->swap(tmpSrc); |
| 882 | return true; |
| 883 | } |
| 884 | |
| 885 | // fall through to the raster case |
| 886 | src = &tmpSrc; |
reed@android.com | fbaa88d | 2009-05-06 17:44:34 +0000 | [diff] [blame] | 887 | } |
reed@android.com | 311c82d | 2009-05-05 23:13:23 +0000 | [diff] [blame] | 888 | |
reed@google.com | 50dfa01 | 2011-04-01 19:05:36 +0000 | [diff] [blame^] | 889 | // we lock this now, since we may need its colortable |
| 890 | SkAutoLockPixels srclock(*src); |
| 891 | if (!src->readyToDraw()) { |
| 892 | return false; |
| 893 | } |
| 894 | |
| 895 | SkBitmap tmpDst; |
| 896 | tmpDst.setConfig(dstConfig, src->width(), src->height()); |
| 897 | |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 898 | // allocate colortable if srcConfig == kIndex8_Config |
| 899 | SkColorTable* ctable = (dstConfig == kIndex8_Config) ? |
reed@google.com | 50dfa01 | 2011-04-01 19:05:36 +0000 | [diff] [blame^] | 900 | new SkColorTable(*src->getColorTable()) : NULL; |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 901 | SkAutoUnref au(ctable); |
reed@google.com | 50dfa01 | 2011-04-01 19:05:36 +0000 | [diff] [blame^] | 902 | if (!tmpDst.allocPixels(alloc, ctable)) { |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 903 | return false; |
| 904 | } |
reed@google.com | 50dfa01 | 2011-04-01 19:05:36 +0000 | [diff] [blame^] | 905 | |
| 906 | SkAutoLockPixels dstlock(tmpDst); |
| 907 | if (!tmpDst.readyToDraw()) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 908 | // allocator/lock failed |
| 909 | return false; |
| 910 | } |
reed@google.com | 50dfa01 | 2011-04-01 19:05:36 +0000 | [diff] [blame^] | 911 | |
reed@android.com | fbaa88d | 2009-05-06 17:44:34 +0000 | [diff] [blame] | 912 | /* do memcpy for the same configs cases, else use drawing |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 913 | */ |
reed@google.com | 50dfa01 | 2011-04-01 19:05:36 +0000 | [diff] [blame^] | 914 | if (src->config() == dstConfig) { |
| 915 | if (tmpDst.getSize() == src->getSize()) { |
| 916 | memcpy(tmpDst.getPixels(), src->getPixels(), src->getSafeSize()); |
reed@android.com | 311c82d | 2009-05-05 23:13:23 +0000 | [diff] [blame] | 917 | } else { |
reed@google.com | 50dfa01 | 2011-04-01 19:05:36 +0000 | [diff] [blame^] | 918 | const char* srcP = reinterpret_cast<const char*>(src->getPixels()); |
| 919 | char* dstP = reinterpret_cast<char*>(tmpDst.getPixels()); |
reed@android.com | 311c82d | 2009-05-05 23:13:23 +0000 | [diff] [blame] | 920 | // to be sure we don't read too much, only copy our logical pixels |
reed@google.com | 50dfa01 | 2011-04-01 19:05:36 +0000 | [diff] [blame^] | 921 | size_t bytesToCopy = tmpDst.width() * tmpDst.bytesPerPixel(); |
| 922 | for (int y = 0; y < tmpDst.height(); y++) { |
reed@android.com | 311c82d | 2009-05-05 23:13:23 +0000 | [diff] [blame] | 923 | memcpy(dstP, srcP, bytesToCopy); |
reed@google.com | 50dfa01 | 2011-04-01 19:05:36 +0000 | [diff] [blame^] | 924 | srcP += src->rowBytes(); |
| 925 | dstP += tmpDst.rowBytes(); |
reed@android.com | 311c82d | 2009-05-05 23:13:23 +0000 | [diff] [blame] | 926 | } |
| 927 | } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 928 | } else { |
| 929 | // if the src has alpha, we have to clear the dst first |
reed@google.com | 50dfa01 | 2011-04-01 19:05:36 +0000 | [diff] [blame^] | 930 | if (!src->isOpaque()) { |
| 931 | tmpDst.eraseColor(0); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 932 | } |
| 933 | |
reed@google.com | 50dfa01 | 2011-04-01 19:05:36 +0000 | [diff] [blame^] | 934 | SkCanvas canvas(tmpDst); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 935 | SkPaint paint; |
| 936 | |
| 937 | paint.setDither(true); |
reed@google.com | 50dfa01 | 2011-04-01 19:05:36 +0000 | [diff] [blame^] | 938 | canvas.drawBitmap(*src, 0, 0, &paint); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 939 | } |
| 940 | |
reed@google.com | 50dfa01 | 2011-04-01 19:05:36 +0000 | [diff] [blame^] | 941 | tmpDst.setIsOpaque(src->isOpaque()); |
reed@android.com | cafc9f9 | 2009-08-22 03:44:57 +0000 | [diff] [blame] | 942 | |
reed@google.com | 50dfa01 | 2011-04-01 19:05:36 +0000 | [diff] [blame^] | 943 | dst->swap(tmpDst); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 944 | return true; |
| 945 | } |
| 946 | |
| 947 | /////////////////////////////////////////////////////////////////////////////// |
| 948 | /////////////////////////////////////////////////////////////////////////////// |
| 949 | |
| 950 | static void downsampleby2_proc32(SkBitmap* dst, int x, int y, |
| 951 | const SkBitmap& src) { |
| 952 | x <<= 1; |
| 953 | y <<= 1; |
| 954 | const SkPMColor* p = src.getAddr32(x, y); |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 955 | const SkPMColor* baseP = p; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 956 | SkPMColor c, ag, rb; |
| 957 | |
| 958 | c = *p; ag = (c >> 8) & 0xFF00FF; rb = c & 0xFF00FF; |
| 959 | if (x < src.width() - 1) { |
| 960 | p += 1; |
| 961 | } |
| 962 | c = *p; ag += (c >> 8) & 0xFF00FF; rb += c & 0xFF00FF; |
| 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() >> 2; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 967 | } |
| 968 | c = *p; ag += (c >> 8) & 0xFF00FF; rb += c & 0xFF00FF; |
| 969 | if (x < src.width() - 1) { |
| 970 | p += 1; |
| 971 | } |
| 972 | c = *p; ag += (c >> 8) & 0xFF00FF; rb += c & 0xFF00FF; |
| 973 | |
| 974 | *dst->getAddr32(x >> 1, y >> 1) = |
| 975 | ((rb >> 2) & 0xFF00FF) | ((ag << 6) & 0xFF00FF00); |
| 976 | } |
| 977 | |
| 978 | static inline uint32_t expand16(U16CPU c) { |
| 979 | return (c & ~SK_G16_MASK_IN_PLACE) | ((c & SK_G16_MASK_IN_PLACE) << 16); |
| 980 | } |
| 981 | |
| 982 | // returns dirt in the top 16bits, but we don't care, since we only |
| 983 | // store the low 16bits. |
| 984 | static inline U16CPU pack16(uint32_t c) { |
| 985 | return (c & ~SK_G16_MASK_IN_PLACE) | ((c >> 16) & SK_G16_MASK_IN_PLACE); |
| 986 | } |
| 987 | |
| 988 | static void downsampleby2_proc16(SkBitmap* dst, int x, int y, |
| 989 | const SkBitmap& src) { |
| 990 | x <<= 1; |
| 991 | y <<= 1; |
| 992 | const uint16_t* p = src.getAddr16(x, y); |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 993 | const uint16_t* baseP = p; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 994 | SkPMColor c; |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 995 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 996 | c = expand16(*p); |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 997 | if (x < src.width() - 1) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 998 | p += 1; |
| 999 | } |
| 1000 | c += expand16(*p); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1001 | |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 1002 | p = baseP; |
| 1003 | if (y < src.height() - 1) { |
| 1004 | p += src.rowBytes() >> 1; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1005 | } |
| 1006 | c += expand16(*p); |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 1007 | if (x < src.width() - 1) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1008 | p += 1; |
| 1009 | } |
| 1010 | c += expand16(*p); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1011 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1012 | *dst->getAddr16(x >> 1, y >> 1) = (uint16_t)pack16(c >> 2); |
| 1013 | } |
| 1014 | |
| 1015 | static uint32_t expand4444(U16CPU c) { |
| 1016 | return (c & 0xF0F) | ((c & ~0xF0F) << 12); |
| 1017 | } |
| 1018 | |
| 1019 | static U16CPU collaps4444(uint32_t c) { |
| 1020 | return (c & 0xF0F) | ((c >> 12) & ~0xF0F); |
| 1021 | } |
| 1022 | |
| 1023 | static void downsampleby2_proc4444(SkBitmap* dst, int x, int y, |
| 1024 | const SkBitmap& src) { |
| 1025 | x <<= 1; |
| 1026 | y <<= 1; |
| 1027 | const uint16_t* p = src.getAddr16(x, y); |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 1028 | const uint16_t* baseP = p; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1029 | uint32_t c; |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1030 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1031 | c = expand4444(*p); |
| 1032 | if (x < src.width() - 1) { |
| 1033 | p += 1; |
| 1034 | } |
| 1035 | c += expand4444(*p); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1036 | |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 1037 | p = baseP; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1038 | if (y < src.height() - 1) { |
reed@android.com | 829c83c | 2009-06-08 12:05:31 +0000 | [diff] [blame] | 1039 | p += src.rowBytes() >> 1; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1040 | } |
| 1041 | c += expand4444(*p); |
| 1042 | if (x < src.width() - 1) { |
| 1043 | p += 1; |
| 1044 | } |
| 1045 | c += expand4444(*p); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1046 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1047 | *dst->getAddr16(x >> 1, y >> 1) = (uint16_t)collaps4444(c >> 2); |
| 1048 | } |
| 1049 | |
| 1050 | void SkBitmap::buildMipMap(bool forceRebuild) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1051 | if (forceRebuild) |
| 1052 | this->freeMipMap(); |
| 1053 | else if (fMipMap) |
| 1054 | return; // we're already built |
| 1055 | |
| 1056 | SkASSERT(NULL == fMipMap); |
| 1057 | |
| 1058 | void (*proc)(SkBitmap* dst, int x, int y, const SkBitmap& src); |
| 1059 | |
| 1060 | const SkBitmap::Config config = this->getConfig(); |
| 1061 | |
| 1062 | switch (config) { |
| 1063 | case kARGB_8888_Config: |
| 1064 | proc = downsampleby2_proc32; |
| 1065 | break; |
| 1066 | case kRGB_565_Config: |
| 1067 | proc = downsampleby2_proc16; |
| 1068 | break; |
| 1069 | case kARGB_4444_Config: |
| 1070 | proc = downsampleby2_proc4444; |
| 1071 | break; |
| 1072 | case kIndex8_Config: |
| 1073 | case kA8_Config: |
| 1074 | default: |
| 1075 | return; // don't build mipmaps for these configs |
| 1076 | } |
reed@android.com | 89bb83a | 2009-05-29 21:30:42 +0000 | [diff] [blame] | 1077 | |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 1078 | SkAutoLockPixels alp(*this); |
| 1079 | if (!this->readyToDraw()) { |
| 1080 | return; |
| 1081 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1082 | |
| 1083 | // whip through our loop to compute the exact size needed |
| 1084 | size_t size = 0; |
| 1085 | int maxLevels = 0; |
| 1086 | { |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 1087 | int width = this->width(); |
| 1088 | int height = this->height(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1089 | for (;;) { |
| 1090 | width >>= 1; |
| 1091 | height >>= 1; |
| 1092 | if (0 == width || 0 == height) { |
| 1093 | break; |
| 1094 | } |
| 1095 | size += ComputeRowBytes(config, width) * height; |
| 1096 | maxLevels += 1; |
| 1097 | } |
| 1098 | } |
reed@android.com | 89bb83a | 2009-05-29 21:30:42 +0000 | [diff] [blame] | 1099 | |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 1100 | // nothing to build |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1101 | if (0 == maxLevels) { |
| 1102 | return; |
| 1103 | } |
| 1104 | |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 1105 | SkBitmap srcBM(*this); |
| 1106 | srcBM.lockPixels(); |
| 1107 | if (!srcBM.readyToDraw()) { |
| 1108 | return; |
| 1109 | } |
| 1110 | |
| 1111 | MipMap* mm = MipMap::Alloc(maxLevels, size); |
| 1112 | if (NULL == mm) { |
| 1113 | return; |
| 1114 | } |
| 1115 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1116 | MipLevel* level = mm->levels(); |
| 1117 | uint8_t* addr = (uint8_t*)mm->pixels(); |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 1118 | int width = this->width(); |
| 1119 | int height = this->height(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1120 | unsigned rowBytes = this->rowBytes(); |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 1121 | SkBitmap dstBM; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1122 | |
| 1123 | for (int i = 0; i < maxLevels; i++) { |
| 1124 | width >>= 1; |
| 1125 | height >>= 1; |
| 1126 | rowBytes = ComputeRowBytes(config, width); |
| 1127 | |
| 1128 | level[i].fPixels = addr; |
reed@android.com | f459a49 | 2009-03-27 12:33:50 +0000 | [diff] [blame] | 1129 | level[i].fWidth = width; |
| 1130 | level[i].fHeight = height; |
reed@android.com | 49f0ff2 | 2009-03-19 21:52:42 +0000 | [diff] [blame] | 1131 | level[i].fRowBytes = rowBytes; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1132 | |
| 1133 | dstBM.setConfig(config, width, height, rowBytes); |
| 1134 | dstBM.setPixels(addr); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1135 | |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 1136 | for (int y = 0; y < height; y++) { |
| 1137 | for (int x = 0; x < width; x++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1138 | proc(&dstBM, x, y, srcBM); |
| 1139 | } |
| 1140 | } |
| 1141 | |
| 1142 | srcBM = dstBM; |
| 1143 | addr += height * rowBytes; |
| 1144 | } |
| 1145 | SkASSERT(addr == (uint8_t*)mm->pixels() + size); |
| 1146 | fMipMap = mm; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1147 | } |
| 1148 | |
| 1149 | bool SkBitmap::hasMipMap() const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1150 | return fMipMap != NULL; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1151 | } |
| 1152 | |
| 1153 | int SkBitmap::extractMipLevel(SkBitmap* dst, SkFixed sx, SkFixed sy) { |
reed@android.com | 83f7bc3 | 2009-07-17 02:42:41 +0000 | [diff] [blame] | 1154 | if (NULL == fMipMap) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1155 | return 0; |
reed@android.com | 83f7bc3 | 2009-07-17 02:42:41 +0000 | [diff] [blame] | 1156 | } |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1157 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1158 | int level = ComputeMipLevel(sx, sy) >> 16; |
| 1159 | SkASSERT(level >= 0); |
| 1160 | if (level <= 0) { |
| 1161 | return 0; |
| 1162 | } |
| 1163 | |
| 1164 | if (level >= fMipMap->fLevelCount) { |
| 1165 | level = fMipMap->fLevelCount - 1; |
| 1166 | } |
| 1167 | if (dst) { |
| 1168 | const MipLevel& mip = fMipMap->levels()[level - 1]; |
| 1169 | dst->setConfig((SkBitmap::Config)this->config(), |
| 1170 | mip.fWidth, mip.fHeight, mip.fRowBytes); |
| 1171 | dst->setPixels(mip.fPixels); |
| 1172 | } |
| 1173 | return level; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1174 | } |
| 1175 | |
| 1176 | SkFixed SkBitmap::ComputeMipLevel(SkFixed sx, SkFixed sy) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1177 | sx = SkAbs32(sx); |
| 1178 | sy = SkAbs32(sy); |
| 1179 | if (sx < sy) { |
| 1180 | sx = sy; |
| 1181 | } |
| 1182 | if (sx < SK_Fixed1) { |
| 1183 | return 0; |
| 1184 | } |
| 1185 | int clz = SkCLZ(sx); |
| 1186 | SkASSERT(clz >= 1 && clz <= 15); |
| 1187 | return SkIntToFixed(15 - clz) + ((unsigned)(sx << (clz + 1)) >> 16); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1188 | } |
| 1189 | |
| 1190 | /////////////////////////////////////////////////////////////////////////////// |
| 1191 | |
reed@android.com | 1cdcb51 | 2009-08-24 19:11:00 +0000 | [diff] [blame] | 1192 | static bool GetBitmapAlpha(const SkBitmap& src, uint8_t SK_RESTRICT alpha[], |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1193 | int alphaRowBytes) { |
| 1194 | SkASSERT(alpha != NULL); |
| 1195 | SkASSERT(alphaRowBytes >= src.width()); |
| 1196 | |
| 1197 | SkBitmap::Config config = src.getConfig(); |
| 1198 | int w = src.width(); |
| 1199 | int h = src.height(); |
| 1200 | int rb = src.rowBytes(); |
| 1201 | |
reed@android.com | 1cdcb51 | 2009-08-24 19:11:00 +0000 | [diff] [blame] | 1202 | SkAutoLockPixels alp(src); |
| 1203 | if (!src.readyToDraw()) { |
| 1204 | // zero out the alpha buffer and return |
| 1205 | while (--h >= 0) { |
| 1206 | memset(alpha, 0, w); |
| 1207 | alpha += alphaRowBytes; |
| 1208 | } |
| 1209 | return false; |
| 1210 | } |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 1211 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1212 | if (SkBitmap::kA8_Config == config && !src.isOpaque()) { |
| 1213 | const uint8_t* s = src.getAddr8(0, 0); |
| 1214 | while (--h >= 0) { |
| 1215 | memcpy(alpha, s, w); |
| 1216 | s += rb; |
| 1217 | alpha += alphaRowBytes; |
| 1218 | } |
| 1219 | } else if (SkBitmap::kARGB_8888_Config == config && !src.isOpaque()) { |
| 1220 | const SkPMColor* SK_RESTRICT s = src.getAddr32(0, 0); |
| 1221 | while (--h >= 0) { |
| 1222 | for (int x = 0; x < w; x++) { |
| 1223 | alpha[x] = SkGetPackedA32(s[x]); |
| 1224 | } |
| 1225 | s = (const SkPMColor*)((const char*)s + rb); |
| 1226 | alpha += alphaRowBytes; |
| 1227 | } |
| 1228 | } else if (SkBitmap::kARGB_4444_Config == config && !src.isOpaque()) { |
| 1229 | const SkPMColor16* SK_RESTRICT s = src.getAddr16(0, 0); |
| 1230 | while (--h >= 0) { |
| 1231 | for (int x = 0; x < w; x++) { |
| 1232 | alpha[x] = SkPacked4444ToA32(s[x]); |
| 1233 | } |
| 1234 | s = (const SkPMColor16*)((const char*)s + rb); |
| 1235 | alpha += alphaRowBytes; |
| 1236 | } |
| 1237 | } else if (SkBitmap::kIndex8_Config == config && !src.isOpaque()) { |
| 1238 | SkColorTable* ct = src.getColorTable(); |
| 1239 | if (ct) { |
| 1240 | const SkPMColor* SK_RESTRICT table = ct->lockColors(); |
| 1241 | const uint8_t* SK_RESTRICT s = src.getAddr8(0, 0); |
| 1242 | while (--h >= 0) { |
| 1243 | for (int x = 0; x < w; x++) { |
| 1244 | alpha[x] = SkGetPackedA32(table[s[x]]); |
| 1245 | } |
| 1246 | s += rb; |
| 1247 | alpha += alphaRowBytes; |
| 1248 | } |
| 1249 | ct->unlockColors(false); |
| 1250 | } |
| 1251 | } else { // src is opaque, so just fill alpha[] with 0xFF |
| 1252 | memset(alpha, 0xFF, h * alphaRowBytes); |
| 1253 | } |
reed@android.com | 1cdcb51 | 2009-08-24 19:11:00 +0000 | [diff] [blame] | 1254 | return true; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1255 | } |
| 1256 | |
| 1257 | #include "SkPaint.h" |
| 1258 | #include "SkMaskFilter.h" |
| 1259 | #include "SkMatrix.h" |
| 1260 | |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 1261 | bool SkBitmap::extractAlpha(SkBitmap* dst, const SkPaint* paint, |
djsollen@google.com | 57f4969 | 2011-02-23 20:46:31 +0000 | [diff] [blame] | 1262 | Allocator *allocator, SkIPoint* offset) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1263 | SkDEBUGCODE(this->validate();) |
| 1264 | |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 1265 | SkBitmap tmpBitmap; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1266 | SkMatrix identity; |
| 1267 | SkMask srcM, dstM; |
| 1268 | |
| 1269 | srcM.fBounds.set(0, 0, this->width(), this->height()); |
| 1270 | srcM.fRowBytes = SkAlign4(this->width()); |
| 1271 | srcM.fFormat = SkMask::kA8_Format; |
| 1272 | |
| 1273 | SkMaskFilter* filter = paint ? paint->getMaskFilter() : NULL; |
| 1274 | |
| 1275 | // compute our (larger?) dst bounds if we have a filter |
| 1276 | if (NULL != filter) { |
| 1277 | identity.reset(); |
| 1278 | srcM.fImage = NULL; |
| 1279 | if (!filter->filterMask(&dstM, srcM, identity, NULL)) { |
| 1280 | goto NO_FILTER_CASE; |
| 1281 | } |
| 1282 | dstM.fRowBytes = SkAlign4(dstM.fBounds.width()); |
| 1283 | } else { |
| 1284 | NO_FILTER_CASE: |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 1285 | tmpBitmap.setConfig(SkBitmap::kA8_Config, this->width(), this->height(), |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1286 | srcM.fRowBytes); |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 1287 | if (!tmpBitmap.allocPixels(allocator, NULL)) { |
| 1288 | // Allocation of pixels for alpha bitmap failed. |
| 1289 | SkDebugf("extractAlpha failed to allocate (%d,%d) alpha bitmap\n", |
| 1290 | tmpBitmap.width(), tmpBitmap.height()); |
| 1291 | return false; |
| 1292 | } |
| 1293 | GetBitmapAlpha(*this, tmpBitmap.getAddr8(0, 0), srcM.fRowBytes); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1294 | if (offset) { |
| 1295 | offset->set(0, 0); |
| 1296 | } |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 1297 | tmpBitmap.swap(*dst); |
| 1298 | return true; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1299 | } |
| 1300 | |
| 1301 | SkAutoMaskImage srcCleanup(&srcM, true); |
| 1302 | |
| 1303 | GetBitmapAlpha(*this, srcM.fImage, srcM.fRowBytes); |
| 1304 | if (!filter->filterMask(&dstM, srcM, identity, NULL)) { |
| 1305 | goto NO_FILTER_CASE; |
| 1306 | } |
| 1307 | |
| 1308 | SkAutoMaskImage dstCleanup(&dstM, false); |
| 1309 | |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 1310 | tmpBitmap.setConfig(SkBitmap::kA8_Config, dstM.fBounds.width(), |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1311 | dstM.fBounds.height(), dstM.fRowBytes); |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 1312 | if (!tmpBitmap.allocPixels(allocator, NULL)) { |
| 1313 | // Allocation of pixels for alpha bitmap failed. |
| 1314 | SkDebugf("extractAlpha failed to allocate (%d,%d) alpha bitmap\n", |
| 1315 | tmpBitmap.width(), tmpBitmap.height()); |
| 1316 | return false; |
| 1317 | } |
| 1318 | memcpy(tmpBitmap.getPixels(), dstM.fImage, dstM.computeImageSize()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1319 | if (offset) { |
| 1320 | offset->set(dstM.fBounds.fLeft, dstM.fBounds.fTop); |
| 1321 | } |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 1322 | SkDEBUGCODE(tmpBitmap.validate();) |
| 1323 | |
| 1324 | tmpBitmap.swap(*dst); |
| 1325 | return true; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1326 | } |
| 1327 | |
| 1328 | /////////////////////////////////////////////////////////////////////////////// |
| 1329 | |
| 1330 | enum { |
| 1331 | SERIALIZE_PIXELTYPE_NONE, |
| 1332 | SERIALIZE_PIXELTYPE_RAW_WITH_CTABLE, |
| 1333 | SERIALIZE_PIXELTYPE_RAW_NO_CTABLE, |
| 1334 | SERIALIZE_PIXELTYPE_REF_DATA, |
| 1335 | SERIALIZE_PIXELTYPE_REF_PTR, |
| 1336 | }; |
| 1337 | |
| 1338 | static void writeString(SkFlattenableWriteBuffer& buffer, const char str[]) { |
| 1339 | size_t len = strlen(str); |
| 1340 | buffer.write32(len); |
| 1341 | buffer.writePad(str, len); |
| 1342 | } |
| 1343 | |
| 1344 | static SkPixelRef::Factory deserialize_factory(SkFlattenableReadBuffer& buffer) { |
| 1345 | size_t len = buffer.readInt(); |
| 1346 | SkAutoSMalloc<256> storage(len + 1); |
| 1347 | char* str = (char*)storage.get(); |
| 1348 | buffer.read(str, len); |
| 1349 | str[len] = 0; |
| 1350 | return SkPixelRef::NameToFactory(str); |
| 1351 | } |
| 1352 | |
| 1353 | /* |
| 1354 | It is tricky to know how much to flatten. If we don't have a pixelref (i.e. |
| 1355 | we just have pixels, then we can only flatten the pixels, or write out an |
| 1356 | empty bitmap. |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1357 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1358 | With a pixelref, we still have the question of recognizing when two sitings |
| 1359 | of the same pixelref are the same, and when they are different. Perhaps we |
| 1360 | should look at the generationID and keep a record of that in some dictionary |
| 1361 | associated with the buffer. SkGLTextureCache does this sort of thing to know |
| 1362 | when to create a new texture. |
| 1363 | */ |
| 1364 | void SkBitmap::flatten(SkFlattenableWriteBuffer& buffer) const { |
| 1365 | buffer.write32(fWidth); |
| 1366 | buffer.write32(fHeight); |
| 1367 | buffer.write32(fRowBytes); |
| 1368 | buffer.write8(fConfig); |
| 1369 | buffer.writeBool(this->isOpaque()); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1370 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1371 | /* If we are called in this mode, then it is up to the caller to manage |
| 1372 | the owner-counts on the pixelref, as we just record the ptr itself. |
| 1373 | */ |
| 1374 | if (!buffer.persistBitmapPixels()) { |
| 1375 | if (fPixelRef) { |
| 1376 | buffer.write8(SERIALIZE_PIXELTYPE_REF_PTR); |
| 1377 | buffer.write32(fPixelRefOffset); |
| 1378 | buffer.writeRefCnt(fPixelRef); |
| 1379 | return; |
| 1380 | } else { |
| 1381 | // we ignore the non-persist request, since we don't have a ref |
| 1382 | // ... or we could just write an empty bitmap... |
| 1383 | // (true) will write an empty bitmap, (false) will flatten the pix |
| 1384 | if (true) { |
| 1385 | buffer.write8(SERIALIZE_PIXELTYPE_NONE); |
| 1386 | return; |
| 1387 | } |
| 1388 | } |
| 1389 | } |
| 1390 | |
| 1391 | if (fPixelRef) { |
| 1392 | SkPixelRef::Factory fact = fPixelRef->getFactory(); |
| 1393 | if (fact) { |
| 1394 | const char* name = SkPixelRef::FactoryToName(fact); |
| 1395 | if (name && *name) { |
| 1396 | buffer.write8(SERIALIZE_PIXELTYPE_REF_DATA); |
| 1397 | buffer.write32(fPixelRefOffset); |
| 1398 | writeString(buffer, name); |
| 1399 | fPixelRef->flatten(buffer); |
| 1400 | return; |
| 1401 | } |
| 1402 | } |
| 1403 | // if we get here, we can't record the pixels |
| 1404 | buffer.write8(SERIALIZE_PIXELTYPE_NONE); |
| 1405 | } else if (fPixels) { |
| 1406 | if (fColorTable) { |
| 1407 | buffer.write8(SERIALIZE_PIXELTYPE_RAW_WITH_CTABLE); |
| 1408 | fColorTable->flatten(buffer); |
| 1409 | } else { |
| 1410 | buffer.write8(SERIALIZE_PIXELTYPE_RAW_NO_CTABLE); |
| 1411 | } |
wjmaclean@chromium.org | 3f0260d | 2011-02-22 22:32:14 +0000 | [diff] [blame] | 1412 | buffer.writePad(fPixels, this->getSafeSize()); |
| 1413 | // There is no writeZeroPad() fcn, so write individual bytes. |
| 1414 | if (this->getSize() > this->getSafeSize()) { |
| 1415 | size_t deltaSize = this->getSize() - this->getSafeSize(); |
| 1416 | // Need aligned pointer to write into due to internal implementa- |
| 1417 | // tion of SkWriter32. |
| 1418 | memset(buffer.reserve(SkAlign4(deltaSize)), 0, deltaSize); |
| 1419 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1420 | } else { |
| 1421 | buffer.write8(SERIALIZE_PIXELTYPE_NONE); |
| 1422 | } |
| 1423 | } |
| 1424 | |
| 1425 | void SkBitmap::unflatten(SkFlattenableReadBuffer& buffer) { |
| 1426 | this->reset(); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1427 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1428 | int width = buffer.readInt(); |
| 1429 | int height = buffer.readInt(); |
| 1430 | int rowBytes = buffer.readInt(); |
| 1431 | int config = buffer.readU8(); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1432 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1433 | this->setConfig((Config)config, width, height, rowBytes); |
| 1434 | this->setIsOpaque(buffer.readBool()); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 1435 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1436 | int reftype = buffer.readU8(); |
| 1437 | switch (reftype) { |
| 1438 | case SERIALIZE_PIXELTYPE_REF_PTR: { |
| 1439 | size_t offset = buffer.readU32(); |
| 1440 | SkPixelRef* pr = (SkPixelRef*)buffer.readRefCnt(); |
| 1441 | this->setPixelRef(pr, offset); |
| 1442 | break; |
| 1443 | } |
| 1444 | case SERIALIZE_PIXELTYPE_REF_DATA: { |
| 1445 | size_t offset = buffer.readU32(); |
| 1446 | SkPixelRef::Factory fact = deserialize_factory(buffer); |
| 1447 | SkPixelRef* pr = fact(buffer); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 1448 | SkSafeUnref(this->setPixelRef(pr, offset)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1449 | break; |
| 1450 | } |
| 1451 | case SERIALIZE_PIXELTYPE_RAW_WITH_CTABLE: |
| 1452 | case SERIALIZE_PIXELTYPE_RAW_NO_CTABLE: { |
| 1453 | SkColorTable* ctable = NULL; |
| 1454 | if (SERIALIZE_PIXELTYPE_RAW_WITH_CTABLE == reftype) { |
| 1455 | ctable = SkNEW_ARGS(SkColorTable, (buffer)); |
| 1456 | } |
wjmaclean@chromium.org | 3f0260d | 2011-02-22 22:32:14 +0000 | [diff] [blame] | 1457 | size_t size = this->getSize(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1458 | if (this->allocPixels(ctable)) { |
| 1459 | this->lockPixels(); |
wjmaclean@chromium.org | 3f0260d | 2011-02-22 22:32:14 +0000 | [diff] [blame] | 1460 | // Just read what we need. |
| 1461 | buffer.read(this->getPixels(), this->getSafeSize()); |
| 1462 | // Keep aligned for subsequent reads. |
| 1463 | buffer.skip(size - this->getSafeSize()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1464 | this->unlockPixels(); |
| 1465 | } else { |
wjmaclean@chromium.org | 0bde180 | 2010-12-22 17:43:54 +0000 | [diff] [blame] | 1466 | buffer.skip(size); // Still skip the full-sized buffer though. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1467 | } |
reed@android.com | 149e2f6 | 2009-05-22 14:39:03 +0000 | [diff] [blame] | 1468 | SkSafeUnref(ctable); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1469 | break; |
| 1470 | } |
| 1471 | case SERIALIZE_PIXELTYPE_NONE: |
| 1472 | break; |
| 1473 | default: |
| 1474 | SkASSERT(!"unrecognized pixeltype in serialized data"); |
| 1475 | sk_throw(); |
| 1476 | } |
| 1477 | } |
| 1478 | |
| 1479 | /////////////////////////////////////////////////////////////////////////////// |
| 1480 | |
| 1481 | SkBitmap::RLEPixels::RLEPixels(int width, int height) { |
| 1482 | fHeight = height; |
| 1483 | fYPtrs = (uint8_t**)sk_malloc_throw(height * sizeof(uint8_t*)); |
reed@android.com | 4516f47 | 2009-06-29 16:25:36 +0000 | [diff] [blame] | 1484 | sk_bzero(fYPtrs, height * sizeof(uint8_t*)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1485 | } |
| 1486 | |
| 1487 | SkBitmap::RLEPixels::~RLEPixels() { |
| 1488 | sk_free(fYPtrs); |
| 1489 | } |
| 1490 | |
| 1491 | /////////////////////////////////////////////////////////////////////////////// |
| 1492 | |
| 1493 | #ifdef SK_DEBUG |
| 1494 | void SkBitmap::validate() const { |
| 1495 | SkASSERT(fConfig < kConfigCount); |
| 1496 | SkASSERT(fRowBytes >= (unsigned)ComputeRowBytes((Config)fConfig, fWidth)); |
| 1497 | SkASSERT(fFlags <= kImageIsOpaque_Flag); |
| 1498 | SkASSERT(fPixelLockCount >= 0); |
| 1499 | SkASSERT(NULL == fColorTable || (unsigned)fColorTable->getRefCnt() < 10000); |
| 1500 | SkASSERT((uint8_t)ComputeBytesPerPixel((Config)fConfig) == fBytesPerPixel); |
| 1501 | |
| 1502 | #if 0 // these asserts are not thread-correct, so disable for now |
| 1503 | if (fPixelRef) { |
| 1504 | if (fPixelLockCount > 0) { |
| 1505 | SkASSERT(fPixelRef->getLockCount() > 0); |
| 1506 | } else { |
| 1507 | SkASSERT(NULL == fPixels); |
| 1508 | SkASSERT(NULL == fColorTable); |
| 1509 | } |
| 1510 | } |
| 1511 | #endif |
| 1512 | } |
| 1513 | #endif |
| 1514 | |