The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | #define LOG_TAG "BitmapFactory" |
| 2 | |
| 3 | #include "SkImageDecoder.h" |
| 4 | #include "SkPixelRef.h" |
| 5 | #include "SkStream.h" |
| 6 | #include "GraphicsJNI.h" |
| 7 | #include "SkTemplates.h" |
| 8 | #include "SkUtils.h" |
| 9 | #include "CreateJavaOutputStreamAdaptor.h" |
| 10 | |
| 11 | #include <android_runtime/AndroidRuntime.h> |
| 12 | #include <utils/Asset.h> |
| 13 | #include <utils/ResourceTypes.h> |
| 14 | #include <netinet/in.h> |
| 15 | #include <sys/mman.h> |
| 16 | |
| 17 | static jclass gOptions_class; |
| 18 | static jfieldID gOptions_justBoundsFieldID; |
| 19 | static jfieldID gOptions_sampleSizeFieldID; |
| 20 | static jfieldID gOptions_configFieldID; |
| 21 | static jfieldID gOptions_ditherFieldID; |
| 22 | static jfieldID gOptions_widthFieldID; |
| 23 | static jfieldID gOptions_heightFieldID; |
| 24 | static jfieldID gOptions_mimeFieldID; |
| 25 | |
| 26 | static jclass gFileDescriptor_class; |
| 27 | static jfieldID gFileDescriptor_descriptor; |
| 28 | |
| 29 | #if 0 |
| 30 | #define TRACE_BITMAP(code) code |
| 31 | #else |
| 32 | #define TRACE_BITMAP(code) |
| 33 | #endif |
| 34 | |
| 35 | //#define MIN_SIZE_TO_USE_MMAP (4*1024) |
| 36 | |
| 37 | /////////////////////////////////////////////////////////////////////////////// |
| 38 | |
| 39 | class AutoDecoderCancel { |
| 40 | public: |
| 41 | AutoDecoderCancel(jobject options, SkImageDecoder* decoder); |
| 42 | ~AutoDecoderCancel(); |
| 43 | |
| 44 | static bool RequestCancel(jobject options); |
| 45 | |
| 46 | private: |
| 47 | AutoDecoderCancel* fNext; |
| 48 | AutoDecoderCancel* fPrev; |
| 49 | jobject fJOptions; // java options object |
| 50 | SkImageDecoder* fDecoder; |
| 51 | |
| 52 | #ifdef SK_DEBUG |
| 53 | static void Validate(); |
| 54 | #else |
| 55 | static void Validate() {} |
| 56 | #endif |
| 57 | }; |
| 58 | |
| 59 | static SkMutex gAutoDecoderCancelMutex; |
| 60 | static AutoDecoderCancel* gAutoDecoderCancel; |
| 61 | #ifdef SK_DEBUG |
| 62 | static int gAutoDecoderCancelCount; |
| 63 | #endif |
| 64 | |
| 65 | AutoDecoderCancel::AutoDecoderCancel(jobject joptions, |
| 66 | SkImageDecoder* decoder) { |
| 67 | fJOptions = joptions; |
| 68 | fDecoder = decoder; |
| 69 | |
| 70 | if (NULL != joptions) { |
| 71 | SkAutoMutexAcquire ac(gAutoDecoderCancelMutex); |
| 72 | |
| 73 | // Add us as the head of the list |
| 74 | fPrev = NULL; |
| 75 | fNext = gAutoDecoderCancel; |
| 76 | if (gAutoDecoderCancel) { |
| 77 | gAutoDecoderCancel->fPrev = this; |
| 78 | } |
| 79 | gAutoDecoderCancel = this; |
| 80 | |
| 81 | SkDEBUGCODE(gAutoDecoderCancelCount += 1;) |
| 82 | Validate(); |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | AutoDecoderCancel::~AutoDecoderCancel() { |
| 87 | if (NULL != fJOptions) { |
| 88 | SkAutoMutexAcquire ac(gAutoDecoderCancelMutex); |
| 89 | |
| 90 | // take us out of the dllist |
| 91 | AutoDecoderCancel* prev = fPrev; |
| 92 | AutoDecoderCancel* next = fNext; |
| 93 | |
| 94 | if (prev) { |
| 95 | SkASSERT(prev->fNext == this); |
| 96 | prev->fNext = next; |
| 97 | } else { |
| 98 | SkASSERT(gAutoDecoderCancel == this); |
| 99 | gAutoDecoderCancel = next; |
| 100 | } |
| 101 | if (next) { |
| 102 | SkASSERT(next->fPrev == this); |
| 103 | next->fPrev = prev; |
| 104 | } |
| 105 | |
| 106 | SkDEBUGCODE(gAutoDecoderCancelCount -= 1;) |
| 107 | Validate(); |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | bool AutoDecoderCancel::RequestCancel(jobject joptions) { |
| 112 | SkAutoMutexAcquire ac(gAutoDecoderCancelMutex); |
| 113 | |
| 114 | Validate(); |
| 115 | |
| 116 | AutoDecoderCancel* pair = gAutoDecoderCancel; |
| 117 | while (pair != NULL) { |
| 118 | if (pair->fJOptions == joptions) { |
| 119 | pair->fDecoder->cancelDecode(); |
| 120 | return true; |
| 121 | } |
| 122 | pair = pair->fNext; |
| 123 | } |
| 124 | return false; |
| 125 | } |
| 126 | |
| 127 | #ifdef SK_DEBUG |
| 128 | // can only call this inside a lock on gAutoDecoderCancelMutex |
| 129 | void AutoDecoderCancel::Validate() { |
| 130 | const int gCount = gAutoDecoderCancelCount; |
| 131 | |
| 132 | if (gCount == 0) { |
| 133 | SkASSERT(gAutoDecoderCancel == NULL); |
| 134 | } else { |
| 135 | SkASSERT(gCount > 0); |
| 136 | |
| 137 | AutoDecoderCancel* curr = gAutoDecoderCancel; |
| 138 | SkASSERT(curr); |
| 139 | SkASSERT(curr->fPrev == NULL); |
| 140 | |
| 141 | int count = 0; |
| 142 | while (curr) { |
| 143 | count += 1; |
| 144 | SkASSERT(count <= gCount); |
| 145 | if (curr->fPrev) { |
| 146 | SkASSERT(curr->fPrev->fNext == curr); |
| 147 | } |
| 148 | if (curr->fNext) { |
| 149 | SkASSERT(curr->fNext->fPrev == curr); |
| 150 | } |
| 151 | curr = curr->fNext; |
| 152 | } |
| 153 | SkASSERT(count == gCount); |
| 154 | } |
| 155 | } |
| 156 | #endif |
| 157 | |
| 158 | /////////////////////////////////////////////////////////////////////////////// |
| 159 | |
| 160 | using namespace android; |
| 161 | |
| 162 | class NinePatchPeeker : public SkImageDecoder::Peeker { |
| 163 | public: |
| 164 | NinePatchPeeker() { |
| 165 | fPatchIsValid = false; |
| 166 | } |
| 167 | |
| 168 | ~NinePatchPeeker() { |
| 169 | if (fPatchIsValid) { |
| 170 | free(fPatch); |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | bool fPatchIsValid; |
| 175 | Res_png_9patch* fPatch; |
| 176 | |
| 177 | virtual bool peek(const char tag[], const void* data, size_t length) { |
| 178 | if (strcmp("npTc", tag) == 0 && length >= sizeof(Res_png_9patch)) { |
| 179 | Res_png_9patch* patch = (Res_png_9patch*) data; |
| 180 | size_t patchSize = patch->serializedSize(); |
| 181 | assert(length == patchSize); |
| 182 | // You have to copy the data because it is owned by the png reader |
| 183 | Res_png_9patch* patchNew = (Res_png_9patch*) malloc(patchSize); |
| 184 | memcpy(patchNew, patch, patchSize); |
| 185 | // this relies on deserialization being done in place |
| 186 | Res_png_9patch::deserialize(patchNew); |
| 187 | patchNew->fileToDevice(); |
| 188 | if (fPatchIsValid) { |
| 189 | free(fPatch); |
| 190 | } |
| 191 | fPatch = patchNew; |
| 192 | //printf("9patch: (%d,%d)-(%d,%d)\n", |
| 193 | // fPatch.sizeLeft, fPatch.sizeTop, |
| 194 | // fPatch.sizeRight, fPatch.sizeBottom); |
| 195 | fPatchIsValid = true; |
| 196 | } else { |
| 197 | fPatch = NULL; |
| 198 | } |
| 199 | return true; // keep on decoding |
| 200 | } |
| 201 | }; |
| 202 | |
| 203 | class AssetStreamAdaptor : public SkStream { |
| 204 | public: |
| 205 | AssetStreamAdaptor(Asset* a) : fAsset(a) {} |
| 206 | |
| 207 | virtual bool rewind() { |
| 208 | off_t pos = fAsset->seek(0, SEEK_SET); |
| 209 | return pos != (off_t)-1; |
| 210 | } |
| 211 | |
| 212 | virtual size_t read(void* buffer, size_t size) { |
| 213 | ssize_t amount; |
| 214 | |
| 215 | if (NULL == buffer) { |
| 216 | if (0 == size) { // caller is asking us for our total length |
| 217 | return fAsset->getLength(); |
| 218 | } |
| 219 | // asset->seek returns new total offset |
| 220 | // we want to return amount that was skipped |
| 221 | |
| 222 | off_t oldOffset = fAsset->seek(0, SEEK_CUR); |
| 223 | if (-1 == oldOffset) { |
| 224 | return 0; |
| 225 | } |
| 226 | off_t newOffset = fAsset->seek(size, SEEK_CUR); |
| 227 | if (-1 == newOffset) { |
| 228 | return 0; |
| 229 | } |
| 230 | amount = newOffset - oldOffset; |
| 231 | } else { |
| 232 | amount = fAsset->read(buffer, size); |
| 233 | } |
| 234 | |
| 235 | if (amount < 0) { |
| 236 | amount = 0; |
| 237 | } |
| 238 | return amount; |
| 239 | } |
| 240 | |
| 241 | private: |
| 242 | Asset* fAsset; |
| 243 | }; |
| 244 | |
| 245 | /////////////////////////////////////////////////////////////////////////////// |
| 246 | |
| 247 | static inline int32_t validOrNeg1(bool isValid, int32_t value) { |
| 248 | // return isValid ? value : -1; |
| 249 | SkASSERT((int)isValid == 0 || (int)isValid == 1); |
| 250 | return ((int32_t)isValid - 1) | value; |
| 251 | } |
| 252 | |
| 253 | static jstring getMimeTypeString(JNIEnv* env, SkImageDecoder::Format format) { |
| 254 | static const struct { |
| 255 | SkImageDecoder::Format fFormat; |
| 256 | const char* fMimeType; |
| 257 | } gMimeTypes[] = { |
| 258 | { SkImageDecoder::kBMP_Format, "image/bmp" }, |
| 259 | { SkImageDecoder::kGIF_Format, "image/gif" }, |
| 260 | { SkImageDecoder::kICO_Format, "image/x-ico" }, |
| 261 | { SkImageDecoder::kJPEG_Format, "image/jpeg" }, |
| 262 | { SkImageDecoder::kPNG_Format, "image/png" }, |
| 263 | { SkImageDecoder::kWBMP_Format, "image/vnd.wap.wbmp" } |
| 264 | }; |
| 265 | |
| 266 | const char* cstr = NULL; |
| 267 | for (size_t i = 0; i < SK_ARRAY_COUNT(gMimeTypes); i++) { |
| 268 | if (gMimeTypes[i].fFormat == format) { |
| 269 | cstr = gMimeTypes[i].fMimeType; |
| 270 | break; |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | jstring jstr = 0; |
| 275 | if (NULL != cstr) { |
| 276 | jstr = env->NewStringUTF(cstr); |
| 277 | } |
| 278 | return jstr; |
| 279 | } |
| 280 | |
| 281 | static jobject doDecode(JNIEnv* env, SkStream* stream, jobject padding, |
| 282 | jobject options) { |
| 283 | |
| 284 | int sampleSize = 1; |
| 285 | SkImageDecoder::Mode mode = SkImageDecoder::kDecodePixels_Mode; |
| 286 | SkBitmap::Config prefConfig = SkBitmap::kNo_Config; |
| 287 | bool doDither = true; |
| 288 | |
| 289 | if (NULL != options) { |
| 290 | sampleSize = env->GetIntField(options, gOptions_sampleSizeFieldID); |
| 291 | if (env->GetBooleanField(options, gOptions_justBoundsFieldID)) { |
| 292 | mode = SkImageDecoder::kDecodeBounds_Mode; |
| 293 | } |
| 294 | // initialize these, in case we fail later on |
| 295 | env->SetIntField(options, gOptions_widthFieldID, -1); |
| 296 | env->SetIntField(options, gOptions_heightFieldID, -1); |
| 297 | env->SetObjectField(options, gOptions_mimeFieldID, 0); |
| 298 | |
| 299 | jobject jconfig = env->GetObjectField(options, gOptions_configFieldID); |
| 300 | prefConfig = GraphicsJNI::getNativeBitmapConfig(env, jconfig); |
| 301 | doDither = env->GetBooleanField(options, gOptions_ditherFieldID); |
| 302 | } |
| 303 | |
| 304 | SkImageDecoder* decoder = SkImageDecoder::Factory(stream); |
| 305 | if (NULL == decoder) { |
| 306 | return NULL; |
| 307 | } |
| 308 | |
| 309 | decoder->setSampleSize(sampleSize); |
| 310 | decoder->setDitherImage(doDither); |
| 311 | |
| 312 | NinePatchPeeker peeker; |
| 313 | JavaPixelAllocator allocator(env); |
| 314 | SkBitmap* bitmap = new SkBitmap; |
| 315 | Res_png_9patch dummy9Patch; |
| 316 | |
| 317 | SkAutoTDelete<SkImageDecoder> add(decoder); |
| 318 | SkAutoTDelete<SkBitmap> adb(bitmap); |
| 319 | |
| 320 | decoder->setPeeker(&peeker); |
| 321 | decoder->setAllocator(&allocator); |
| 322 | |
| 323 | AutoDecoderCancel adc(options, decoder); |
| 324 | |
| 325 | if (!decoder->decode(stream, bitmap, prefConfig, mode)) { |
| 326 | return NULL; |
| 327 | } |
| 328 | |
| 329 | // update options (if any) |
| 330 | if (NULL != options) { |
| 331 | env->SetIntField(options, gOptions_widthFieldID, bitmap->width()); |
| 332 | env->SetIntField(options, gOptions_heightFieldID, bitmap->height()); |
| 333 | // TODO: set the mimeType field with the data from the codec. |
| 334 | // but how to reuse a set of strings, rather than allocating new one |
| 335 | // each time? |
| 336 | env->SetObjectField(options, gOptions_mimeFieldID, |
| 337 | getMimeTypeString(env, decoder->getFormat())); |
| 338 | } |
| 339 | |
| 340 | // if we're in justBounds mode, return now (skip the java bitmap) |
| 341 | if (SkImageDecoder::kDecodeBounds_Mode == mode) { |
| 342 | return NULL; |
| 343 | } |
| 344 | |
| 345 | jbyteArray ninePatchChunk = NULL; |
| 346 | if (peeker.fPatchIsValid) { |
| 347 | size_t ninePatchArraySize = peeker.fPatch->serializedSize(); |
| 348 | ninePatchChunk = env->NewByteArray(ninePatchArraySize); |
| 349 | if (NULL == ninePatchChunk) { |
| 350 | return NULL; |
| 351 | } |
| 352 | jbyte* array = (jbyte*)env->GetPrimitiveArrayCritical(ninePatchChunk, |
| 353 | NULL); |
| 354 | if (NULL == array) { |
| 355 | return NULL; |
| 356 | } |
| 357 | peeker.fPatch->serialize(array); |
| 358 | env->ReleasePrimitiveArrayCritical(ninePatchChunk, array, 0); |
| 359 | } |
| 360 | |
| 361 | // detach bitmap from its autotdeleter, since we want to own it now |
| 362 | adb.detach(); |
| 363 | |
| 364 | if (padding) { |
| 365 | if (peeker.fPatchIsValid) { |
| 366 | GraphicsJNI::set_jrect(env, padding, |
| 367 | peeker.fPatch->paddingLeft, |
| 368 | peeker.fPatch->paddingTop, |
| 369 | peeker.fPatch->paddingRight, |
| 370 | peeker.fPatch->paddingBottom); |
| 371 | } else { |
| 372 | GraphicsJNI::set_jrect(env, padding, -1, -1, -1, -1); |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | // promise we will never change our pixels (great for sharing and pictures) |
| 377 | SkPixelRef* ref = bitmap->pixelRef(); |
| 378 | SkASSERT(ref); |
| 379 | ref->setImmutable(); |
| 380 | |
| 381 | return GraphicsJNI::createBitmap(env, bitmap, false, ninePatchChunk); |
| 382 | } |
| 383 | |
| 384 | static jobject nativeDecodeStream(JNIEnv* env, jobject clazz, |
| 385 | jobject is, // InputStream |
| 386 | jbyteArray storage, // byte[] |
| 387 | jobject padding, |
| 388 | jobject options) { // BitmapFactory$Options |
| 389 | jobject bitmap = NULL; |
| 390 | SkStream* stream = CreateJavaInputStreamAdaptor(env, is, storage); |
| 391 | |
| 392 | if (stream) { |
| 393 | bitmap = doDecode(env, stream, padding, options); |
| 394 | stream->unref(); |
| 395 | } |
| 396 | return bitmap; |
| 397 | } |
| 398 | |
| 399 | static ssize_t getFDSize(int fd) { |
| 400 | off_t curr = ::lseek(fd, 0, SEEK_CUR); |
| 401 | if (curr < 0) { |
| 402 | return 0; |
| 403 | } |
| 404 | size_t size = ::lseek(fd, 0, SEEK_END); |
| 405 | ::lseek(fd, curr, SEEK_SET); |
| 406 | return size; |
| 407 | } |
| 408 | |
| 409 | /** Restore the file descriptor's offset in our destructor |
| 410 | */ |
| 411 | class AutoFDSeek { |
| 412 | public: |
| 413 | AutoFDSeek(int fd) : fFD(fd) { |
| 414 | fCurr = ::lseek(fd, 0, SEEK_CUR); |
| 415 | } |
| 416 | ~AutoFDSeek() { |
| 417 | if (fCurr >= 0) { |
| 418 | ::lseek(fFD, fCurr, SEEK_SET); |
| 419 | } |
| 420 | } |
| 421 | private: |
| 422 | int fFD; |
| 423 | off_t fCurr; |
| 424 | }; |
| 425 | |
| 426 | static jobject nativeDecodeFileDescriptor(JNIEnv* env, jobject clazz, |
| 427 | jobject fileDescriptor, |
| 428 | jobject padding, |
| 429 | jobject bitmapFactoryOptions) { |
| 430 | NPE_CHECK_RETURN_ZERO(env, fileDescriptor); |
| 431 | |
| 432 | jint descriptor = env->GetIntField(fileDescriptor, |
| 433 | gFileDescriptor_descriptor); |
| 434 | |
| 435 | #ifdef MIN_SIZE_TO_USE_MMAP |
| 436 | // First try to use mmap |
| 437 | size_t size = getFDSize(descriptor); |
| 438 | if (size >= MIN_SIZE_TO_USE_MMAP) { |
| 439 | void* addr = mmap(NULL, size, PROT_READ, MAP_PRIVATE, descriptor, 0); |
| 440 | // SkDebugf("-------- mmap returned %p %d\n", addr, size); |
| 441 | if (MAP_FAILED != addr) { |
| 442 | SkMemoryStream strm(addr, size); |
| 443 | jobject obj = doDecode(env, &strm, padding, bitmapFactoryOptions); |
| 444 | munmap(addr, size); |
| 445 | return obj; |
| 446 | } |
| 447 | } |
| 448 | #endif |
| 449 | |
| 450 | // we pass false for closeWhenDone, since the caller owns the descriptor |
| 451 | SkFDStream file(descriptor, false); |
| 452 | if (!file.isValid()) { |
| 453 | return NULL; |
| 454 | } |
| 455 | |
| 456 | /* Restore our offset when we leave, so the caller doesn't have to. |
| 457 | This is a real feature, so we can be called more than once with the |
| 458 | same descriptor. |
| 459 | */ |
| 460 | AutoFDSeek as(descriptor); |
| 461 | |
| 462 | return doDecode(env, &file, padding, bitmapFactoryOptions); |
| 463 | } |
| 464 | |
| 465 | static jobject nativeDecodeAsset(JNIEnv* env, jobject clazz, |
| 466 | jint native_asset, // Asset |
| 467 | jobject padding, // Rect |
| 468 | jobject options) { // BitmapFactory$Options |
| 469 | AssetStreamAdaptor mystream((Asset*)native_asset); |
| 470 | |
| 471 | return doDecode(env, &mystream, padding, options); |
| 472 | } |
| 473 | |
| 474 | static jobject nativeDecodeByteArray(JNIEnv* env, jobject, jbyteArray byteArray, |
| 475 | int offset, int length, jobject options) { |
| 476 | AutoJavaByteArray ar(env, byteArray); |
| 477 | SkMemoryStream stream(ar.ptr() + offset, length); |
| 478 | |
| 479 | return doDecode(env, &stream, NULL, options); |
| 480 | } |
| 481 | |
| 482 | static void nativeRequestCancel(JNIEnv*, jobject joptions) { |
| 483 | (void)AutoDecoderCancel::RequestCancel(joptions); |
| 484 | } |
| 485 | |
| 486 | static jbyteArray nativeScaleNinePatch(JNIEnv* env, jobject, jbyteArray chunkObject, jfloat scale, |
| 487 | jobject padding) { |
| 488 | |
| 489 | jbyte* array = env->GetByteArrayElements(chunkObject, 0); |
| 490 | if (array != NULL) { |
| 491 | size_t chunkSize = env->GetArrayLength(chunkObject); |
| 492 | void* storage = alloca(chunkSize); |
| 493 | android::Res_png_9patch* chunk = static_cast<android::Res_png_9patch*>(storage); |
| 494 | memcpy(chunk, array, chunkSize); |
| 495 | android::Res_png_9patch::deserialize(chunk); |
| 496 | |
| 497 | chunk->paddingLeft = int(chunk->paddingLeft * scale + 0.5f); |
| 498 | chunk->paddingTop = int(chunk->paddingTop * scale + 0.5f); |
| 499 | chunk->paddingRight = int(chunk->paddingRight * scale + 0.5f); |
| 500 | chunk->paddingBottom = int(chunk->paddingBottom * scale + 0.5f); |
| 501 | |
| 502 | for (int i = 0; i < chunk->numXDivs; i++) { |
| 503 | chunk->xDivs[i] = int(chunk->xDivs[i] * scale + 0.5f); |
| 504 | if (i > 0 && chunk->xDivs[i] == chunk->xDivs[i - 1]) { |
| 505 | chunk->xDivs[i]++; |
| 506 | } |
| 507 | } |
| 508 | |
| 509 | for (int i = 0; i < chunk->numYDivs; i++) { |
| 510 | chunk->yDivs[i] = int(chunk->yDivs[i] * scale + 0.5f); |
| 511 | if (i > 0 && chunk->yDivs[i] == chunk->yDivs[i - 1]) { |
| 512 | chunk->yDivs[i]++; |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | memcpy(array, chunk, chunkSize); |
| 517 | |
| 518 | if (padding) { |
| 519 | GraphicsJNI::set_jrect(env, padding, chunk->paddingLeft, chunk->paddingTop, |
| 520 | chunk->paddingRight, chunk->paddingBottom); |
| 521 | } |
| 522 | |
| 523 | env->ReleaseByteArrayElements(chunkObject, array, 0); |
| 524 | } |
| 525 | return chunkObject; |
| 526 | } |
| 527 | |
| 528 | /////////////////////////////////////////////////////////////////////////////// |
| 529 | |
| 530 | static JNINativeMethod gMethods[] = { |
| 531 | { "nativeDecodeStream", |
| 532 | "(Ljava/io/InputStream;[BLandroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", |
| 533 | (void*)nativeDecodeStream |
| 534 | }, |
| 535 | |
| 536 | { "nativeDecodeFileDescriptor", |
| 537 | "(Ljava/io/FileDescriptor;Landroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", |
| 538 | (void*)nativeDecodeFileDescriptor |
| 539 | }, |
| 540 | |
| 541 | { "nativeDecodeAsset", |
| 542 | "(ILandroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", |
| 543 | (void*)nativeDecodeAsset |
| 544 | }, |
| 545 | |
| 546 | { "nativeDecodeByteArray", |
| 547 | "([BIILandroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", |
| 548 | (void*)nativeDecodeByteArray |
| 549 | }, |
| 550 | |
| 551 | { "nativeScaleNinePatch", |
| 552 | "([BFLandroid/graphics/Rect;)[B", |
| 553 | (void*)nativeScaleNinePatch |
| 554 | } |
| 555 | |
| 556 | }; |
| 557 | |
| 558 | static JNINativeMethod gOptionsMethods[] = { |
| 559 | { "requestCancel", "()V", (void*)nativeRequestCancel } |
| 560 | }; |
| 561 | |
| 562 | static jclass make_globalref(JNIEnv* env, const char classname[]) { |
| 563 | jclass c = env->FindClass(classname); |
| 564 | SkASSERT(c); |
| 565 | return (jclass)env->NewGlobalRef(c); |
| 566 | } |
| 567 | |
| 568 | static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz, |
| 569 | const char fieldname[], const char type[]) { |
| 570 | jfieldID id = env->GetFieldID(clazz, fieldname, type); |
| 571 | SkASSERT(id); |
| 572 | return id; |
| 573 | } |
| 574 | |
| 575 | #define kClassPathName "android/graphics/BitmapFactory" |
| 576 | |
| 577 | #define RETURN_ERR_IF_NULL(value) \ |
| 578 | do { if (!(value)) { assert(0); return -1; } } while (false) |
| 579 | |
| 580 | int register_android_graphics_BitmapFactory(JNIEnv* env); |
| 581 | int register_android_graphics_BitmapFactory(JNIEnv* env) { |
| 582 | gOptions_class = make_globalref(env, "android/graphics/BitmapFactory$Options"); |
| 583 | gOptions_justBoundsFieldID = getFieldIDCheck(env, gOptions_class, "inJustDecodeBounds", "Z"); |
| 584 | gOptions_sampleSizeFieldID = getFieldIDCheck(env, gOptions_class, "inSampleSize", "I"); |
| 585 | gOptions_configFieldID = getFieldIDCheck(env, gOptions_class, "inPreferredConfig", |
| 586 | "Landroid/graphics/Bitmap$Config;"); |
| 587 | gOptions_ditherFieldID = getFieldIDCheck(env, gOptions_class, "inDither", "Z"); |
| 588 | gOptions_widthFieldID = getFieldIDCheck(env, gOptions_class, "outWidth", "I"); |
| 589 | gOptions_heightFieldID = getFieldIDCheck(env, gOptions_class, "outHeight", "I"); |
| 590 | gOptions_mimeFieldID = getFieldIDCheck(env, gOptions_class, "outMimeType", "Ljava/lang/String;"); |
| 591 | |
| 592 | gFileDescriptor_class = make_globalref(env, "java/io/FileDescriptor"); |
| 593 | gFileDescriptor_descriptor = getFieldIDCheck(env, gFileDescriptor_class, "descriptor", "I"); |
| 594 | |
| 595 | int ret = AndroidRuntime::registerNativeMethods(env, |
| 596 | "android/graphics/BitmapFactory$Options", |
| 597 | gOptionsMethods, |
| 598 | SK_ARRAY_COUNT(gOptionsMethods)); |
| 599 | if (ret) { |
| 600 | return ret; |
| 601 | } |
| 602 | return android::AndroidRuntime::registerNativeMethods(env, kClassPathName, |
| 603 | gMethods, SK_ARRAY_COUNT(gMethods)); |
| 604 | } |