BitmapFactory.cpp revision 76344241719384f160ee623554f66987d0fcae41 
1#define LOG_TAG "BitmapFactory"
2
3#include "BitmapFactory.h"
4#include "NinePatchPeeker.h"
5#include "SkImageDecoder.h"
6#include "SkImageRef_ashmem.h"
7#include "SkImageRef_GlobalPool.h"
8#include "SkPixelRef.h"
9#include "SkStream.h"
10#include "SkTemplates.h"
11#include "SkUtils.h"
12#include "CreateJavaOutputStreamAdaptor.h"
13#include "AutoDecodeCancel.h"
14#include "Utils.h"
15#include "JNIHelp.h"
16
17#include <android_runtime/AndroidRuntime.h>
18#include <androidfw/Asset.h>
19#include <androidfw/ResourceTypes.h>
20#include <netinet/in.h>
21#include <sys/mman.h>
22#include <sys/stat.h>
23
24jfieldID gOptions_justBoundsFieldID;
25jfieldID gOptions_sampleSizeFieldID;
26jfieldID gOptions_configFieldID;
27jfieldID gOptions_mutableFieldID;
28jfieldID gOptions_ditherFieldID;
29jfieldID gOptions_purgeableFieldID;
30jfieldID gOptions_shareableFieldID;
31jfieldID gOptions_preferQualityOverSpeedFieldID;
32jfieldID gOptions_widthFieldID;
33jfieldID gOptions_heightFieldID;
34jfieldID gOptions_mimeFieldID;
35jfieldID gOptions_mCancelID;
36jfieldID gOptions_bitmapFieldID;
37jfieldID gBitmap_nativeBitmapFieldID;
38jfieldID gBitmap_layoutBoundsFieldID;
39
40#if 0
41    #define TRACE_BITMAP(code)  code
42#else
43    #define TRACE_BITMAP(code)
44#endif
45
46using namespace android;
47
48static inline int32_t validOrNeg1(bool isValid, int32_t value) {
49//    return isValid ? value : -1;
50    SkASSERT((int)isValid == 0 || (int)isValid == 1);
51    return ((int32_t)isValid - 1) | value;
52}
53
54jstring getMimeTypeString(JNIEnv* env, SkImageDecoder::Format format) {
55    static const struct {
56        SkImageDecoder::Format fFormat;
57        const char*            fMimeType;
58    } gMimeTypes[] = {
59        { SkImageDecoder::kBMP_Format,  "image/bmp" },
60        { SkImageDecoder::kGIF_Format,  "image/gif" },
61        { SkImageDecoder::kICO_Format,  "image/x-ico" },
62        { SkImageDecoder::kJPEG_Format, "image/jpeg" },
63        { SkImageDecoder::kPNG_Format,  "image/png" },
64        { SkImageDecoder::kWBMP_Format, "image/vnd.wap.wbmp" }
65    };
66
67    const char* cstr = NULL;
68    for (size_t i = 0; i < SK_ARRAY_COUNT(gMimeTypes); i++) {
69        if (gMimeTypes[i].fFormat == format) {
70            cstr = gMimeTypes[i].fMimeType;
71            break;
72        }
73    }
74
75    jstring jstr = 0;
76    if (NULL != cstr) {
77        jstr = env->NewStringUTF(cstr);
78    }
79    return jstr;
80}
81
82static bool optionsPurgeable(JNIEnv* env, jobject options) {
83    return options != NULL && env->GetBooleanField(options, gOptions_purgeableFieldID);
84}
85
86static bool optionsShareable(JNIEnv* env, jobject options) {
87    return options != NULL && env->GetBooleanField(options, gOptions_shareableFieldID);
88}
89
90static bool optionsJustBounds(JNIEnv* env, jobject options) {
91    return options != NULL && env->GetBooleanField(options, gOptions_justBoundsFieldID);
92}
93
94static void scaleNinePatchChunk(android::Res_png_9patch* chunk, float scale) {
95    chunk->paddingLeft = int(chunk->paddingLeft * scale + 0.5f);
96    chunk->paddingTop = int(chunk->paddingTop * scale + 0.5f);
97    chunk->paddingRight = int(chunk->paddingRight * scale + 0.5f);
98    chunk->paddingBottom = int(chunk->paddingBottom * scale + 0.5f);
99
100    for (int i = 0; i < chunk->numXDivs; i++) {
101        chunk->xDivs[i] = int(chunk->xDivs[i] * scale + 0.5f);
102        if (i > 0 && chunk->xDivs[i] == chunk->xDivs[i - 1]) {
103            chunk->xDivs[i]++;
104        }
105    }
106
107    for (int i = 0; i < chunk->numYDivs; i++) {
108        chunk->yDivs[i] = int(chunk->yDivs[i] * scale + 0.5f);
109        if (i > 0 && chunk->yDivs[i] == chunk->yDivs[i - 1]) {
110            chunk->yDivs[i]++;
111        }
112    }
113}
114
115static jbyteArray nativeScaleNinePatch(JNIEnv* env, jobject, jbyteArray chunkObject, jfloat scale,
116        jobject padding) {
117
118    jbyte* array = env->GetByteArrayElements(chunkObject, 0);
119    if (array != NULL) {
120        size_t chunkSize = env->GetArrayLength(chunkObject);
121        void* storage = alloca(chunkSize);
122        android::Res_png_9patch* chunk = static_cast<android::Res_png_9patch*>(storage);
123        memcpy(chunk, array, chunkSize);
124        android::Res_png_9patch::deserialize(chunk);
125
126        scaleNinePatchChunk(chunk, scale);
127        memcpy(array, chunk, chunkSize);
128
129        if (padding) {
130            GraphicsJNI::set_jrect(env, padding, chunk->paddingLeft, chunk->paddingTop,
131                    chunk->paddingRight, chunk->paddingBottom);
132        }
133
134        env->ReleaseByteArrayElements(chunkObject, array, 0);
135    }
136    return chunkObject;
137}
138
139static SkPixelRef* installPixelRef(SkBitmap* bitmap, SkStream* stream,
140        int sampleSize, bool ditherImage) {
141
142    SkImageRef* pr;
143    // only use ashmem for large images, since mmaps come at a price
144    if (bitmap->getSize() >= 32 * 1024) {
145        pr = new SkImageRef_ashmem(stream, bitmap->config(), sampleSize);
146    } else {
147        pr = new SkImageRef_GlobalPool(stream, bitmap->config(), sampleSize);
148    }
149    pr->setDitherImage(ditherImage);
150    bitmap->setPixelRef(pr)->unref();
151    pr->isOpaque(bitmap);
152    return pr;
153}
154
155// since we "may" create a purgeable imageref, we require the stream be ref'able
156// i.e. dynamically allocated, since its lifetime may exceed the current stack
157// frame.
158static jobject doDecode(JNIEnv* env, SkStream* stream, jobject padding,
159        jobject options, bool allowPurgeable, bool forcePurgeable = false,
160        bool applyScale = false, float scale = 1.0f) {
161
162    int sampleSize = 1;
163
164    SkImageDecoder::Mode mode = SkImageDecoder::kDecodePixels_Mode;
165    SkBitmap::Config prefConfig = SkBitmap::kARGB_8888_Config;
166
167    bool doDither = true;
168    bool isMutable = false;
169    bool willScale = applyScale && scale != 1.0f;
170    bool isPurgeable = !willScale &&
171            (forcePurgeable || (allowPurgeable && optionsPurgeable(env, options)));
172    bool preferQualityOverSpeed = false;
173
174    jobject javaBitmap = NULL;
175
176    if (options != NULL) {
177        sampleSize = env->GetIntField(options, gOptions_sampleSizeFieldID);
178        if (optionsJustBounds(env, options)) {
179            mode = SkImageDecoder::kDecodeBounds_Mode;
180        }
181
182        // initialize these, in case we fail later on
183        env->SetIntField(options, gOptions_widthFieldID, -1);
184        env->SetIntField(options, gOptions_heightFieldID, -1);
185        env->SetObjectField(options, gOptions_mimeFieldID, 0);
186
187        jobject jconfig = env->GetObjectField(options, gOptions_configFieldID);
188        prefConfig = GraphicsJNI::getNativeBitmapConfig(env, jconfig);
189        isMutable = env->GetBooleanField(options, gOptions_mutableFieldID);
190        doDither = env->GetBooleanField(options, gOptions_ditherFieldID);
191        preferQualityOverSpeed = env->GetBooleanField(options,
192                gOptions_preferQualityOverSpeedFieldID);
193        javaBitmap = env->GetObjectField(options, gOptions_bitmapFieldID);
194    }
195
196    if (willScale && javaBitmap != NULL) {
197        return nullObjectReturn("Cannot pre-scale a reused bitmap");
198    }
199
200    SkImageDecoder* decoder = SkImageDecoder::Factory(stream);
201    if (decoder == NULL) {
202        return nullObjectReturn("SkImageDecoder::Factory returned null");
203    }
204
205    decoder->setSampleSize(sampleSize);
206    decoder->setDitherImage(doDither);
207    decoder->setPreferQualityOverSpeed(preferQualityOverSpeed);
208
209    NinePatchPeeker peeker(decoder);
210    JavaPixelAllocator javaAllocator(env);
211
212    SkBitmap* bitmap;
213    if (javaBitmap == NULL) {
214        bitmap = new SkBitmap;
215    } else {
216        if (sampleSize != 1) {
217            return nullObjectReturn("SkImageDecoder: Cannot reuse bitmap with sampleSize != 1");
218        }
219        bitmap = (SkBitmap*) env->GetIntField(javaBitmap, gBitmap_nativeBitmapFieldID);
220        // config of supplied bitmap overrules config set in options
221        prefConfig = bitmap->getConfig();
222    }
223
224    SkAutoTDelete<SkImageDecoder> add(decoder);
225    SkAutoTDelete<SkBitmap> adb(bitmap, javaBitmap == NULL);
226
227    decoder->setPeeker(&peeker);
228    if (!isPurgeable) {
229        decoder->setAllocator(&javaAllocator);
230    }
231
232    AutoDecoderCancel adc(options, decoder);
233
234    // To fix the race condition in case "requestCancelDecode"
235    // happens earlier than AutoDecoderCancel object is added
236    // to the gAutoDecoderCancelMutex linked list.
237    if (options != NULL && env->GetBooleanField(options, gOptions_mCancelID)) {
238        return nullObjectReturn("gOptions_mCancelID");
239    }
240
241    SkImageDecoder::Mode decodeMode = mode;
242    if (isPurgeable) {
243        decodeMode = SkImageDecoder::kDecodeBounds_Mode;
244    }
245
246    SkBitmap* decoded;
247    if (willScale) {
248        decoded = new SkBitmap;
249    } else {
250        decoded = bitmap;
251    }
252    SkAutoTDelete<SkBitmap> adb2(willScale ? decoded : NULL);
253
254    if (!decoder->decode(stream, decoded, prefConfig, decodeMode, javaBitmap != NULL)) {
255        return nullObjectReturn("decoder->decode returned false");
256    }
257
258    int scaledWidth = decoded->width();
259    int scaledHeight = decoded->height();
260
261    if (willScale && mode != SkImageDecoder::kDecodeBounds_Mode) {
262        scaledWidth = int(scaledWidth * scale + 0.5f);
263        scaledHeight = int(scaledHeight * scale + 0.5f);
264    }
265
266    // update options (if any)
267    if (options != NULL) {
268        env->SetIntField(options, gOptions_widthFieldID, scaledWidth);
269        env->SetIntField(options, gOptions_heightFieldID, scaledHeight);
270        env->SetObjectField(options, gOptions_mimeFieldID,
271                getMimeTypeString(env, decoder->getFormat()));
272    }
273
274    // if we're in justBounds mode, return now (skip the java bitmap)
275    if (mode == SkImageDecoder::kDecodeBounds_Mode) {
276        return NULL;
277    }
278
279    jbyteArray ninePatchChunk = NULL;
280    if (peeker.fPatch != NULL) {
281        if (willScale) {
282            scaleNinePatchChunk(peeker.fPatch, scale);
283        }
284
285        size_t ninePatchArraySize = peeker.fPatch->serializedSize();
286        ninePatchChunk = env->NewByteArray(ninePatchArraySize);
287        if (ninePatchChunk == NULL) {
288            return nullObjectReturn("ninePatchChunk == null");
289        }
290
291        jbyte* array = (jbyte*) env->GetPrimitiveArrayCritical(ninePatchChunk, NULL);
292        if (array == NULL) {
293            return nullObjectReturn("primitive array == null");
294        }
295
296        peeker.fPatch->serialize(array);
297        env->ReleasePrimitiveArrayCritical(ninePatchChunk, array, 0);
298    }
299
300    jintArray layoutBounds = NULL;
301    if (peeker.fLayoutBounds != NULL) {
302        layoutBounds = env->NewIntArray(4);
303        if (layoutBounds == NULL) {
304            return nullObjectReturn("layoutBounds == null");
305        }
306
307        jint scaledBounds[4];
308        if (willScale) {
309            for (int i=0; i<4; i++) {
310                scaledBounds[i] = (jint)((((jint*)peeker.fLayoutBounds)[i]*scale) + .5f);
311            }
312        } else {
313            memcpy(scaledBounds, (jint*)peeker.fLayoutBounds, sizeof(scaledBounds));
314        }
315        env->SetIntArrayRegion(layoutBounds, 0, 4, scaledBounds);
316        if (javaBitmap != NULL) {
317            env->SetObjectField(javaBitmap, gBitmap_layoutBoundsFieldID, layoutBounds);
318        }
319    }
320    // detach bitmap from its autodeleter, since we want to own it now
321    adb.detach();
322
323    if (willScale) {
324        // This is weird so let me explain: we could use the scale parameter
325        // directly, but for historical reasons this is how the corresponding
326        // Dalvik code has always behaved. We simply recreate the behavior here.
327        // The result is slightly different from simply using scale because of
328        // the 0.5f rounding bias applied when computing the target image size
329        const float sx = scaledWidth / float(decoded->width());
330        const float sy = scaledHeight / float(decoded->height());
331
332        bitmap->setConfig(decoded->getConfig(), scaledWidth, scaledHeight);
333        bitmap->setIsOpaque(decoded->isOpaque());
334        bitmap->allocPixels(&javaAllocator, NULL);
335        bitmap->eraseColor(0);
336
337        SkPaint paint;
338        paint.setFilterBitmap(true);
339
340        SkCanvas canvas(*bitmap);
341        canvas.scale(sx, sy);
342        canvas.drawBitmap(*decoded, 0.0f, 0.0f, &paint);
343    }
344
345    if (padding) {
346        if (peeker.fPatch != NULL) {
347            GraphicsJNI::set_jrect(env, padding,
348                    peeker.fPatch->paddingLeft, peeker.fPatch->paddingTop,
349                    peeker.fPatch->paddingRight, peeker.fPatch->paddingBottom);
350        } else {
351            GraphicsJNI::set_jrect(env, padding, -1, -1, -1, -1);
352        }
353    }
354
355    SkPixelRef* pr;
356    if (isPurgeable) {
357        pr = installPixelRef(bitmap, stream, sampleSize, doDither);
358    } else {
359        // if we get here, we're in kDecodePixels_Mode and will therefore
360        // already have a pixelref installed.
361        pr = bitmap->pixelRef();
362    }
363
364    if (!isMutable) {
365        // promise we will never change our pixels (great for sharing and pictures)
366        pr->setImmutable();
367    }
368
369    if (javaBitmap != NULL) {
370        // If a java bitmap was passed in for reuse, pass it back
371        return javaBitmap;
372    }
373    // now create the java bitmap
374    return GraphicsJNI::createBitmap(env, bitmap, javaAllocator.getStorageObj(),
375            isMutable, ninePatchChunk, layoutBounds, -1);
376}
377
378static jobject nativeDecodeStreamScaled(JNIEnv* env, jobject clazz, jobject is, jbyteArray storage,
379        jobject padding, jobject options, jboolean applyScale, jfloat scale) {
380
381    jobject bitmap = NULL;
382    SkStream* stream = CreateJavaInputStreamAdaptor(env, is, storage, 0);
383
384    if (stream) {
385        // for now we don't allow purgeable with java inputstreams
386        bitmap = doDecode(env, stream, padding, options, false, false, applyScale, scale);
387        stream->unref();
388    }
389    return bitmap;
390}
391
392static jobject nativeDecodeStream(JNIEnv* env, jobject clazz, jobject is, jbyteArray storage,
393        jobject padding, jobject options) {
394
395    return nativeDecodeStreamScaled(env, clazz, is, storage, padding, options, false, 1.0f);
396}
397
398static ssize_t getFDSize(int fd) {
399    off64_t curr = ::lseek64(fd, 0, SEEK_CUR);
400    if (curr < 0) {
401        return 0;
402    }
403    size_t size = ::lseek(fd, 0, SEEK_END);
404    ::lseek64(fd, curr, SEEK_SET);
405    return size;
406}
407
408static jobject nativeDecodeFileDescriptor(JNIEnv* env, jobject clazz, jobject fileDescriptor,
409        jobject padding, jobject bitmapFactoryOptions) {
410
411    NPE_CHECK_RETURN_ZERO(env, fileDescriptor);
412
413    jint descriptor = jniGetFDFromFileDescriptor(env, fileDescriptor);
414
415    bool isPurgeable = optionsPurgeable(env, bitmapFactoryOptions);
416    bool isShareable = optionsShareable(env, bitmapFactoryOptions);
417    bool weOwnTheFD = false;
418    if (isPurgeable && isShareable) {
419        int newFD = ::dup(descriptor);
420        if (-1 != newFD) {
421            weOwnTheFD = true;
422            descriptor = newFD;
423        }
424    }
425
426    SkFDStream* stream = new SkFDStream(descriptor, weOwnTheFD);
427    SkAutoUnref aur(stream);
428    if (!stream->isValid()) {
429        return NULL;
430    }
431
432    /* Restore our offset when we leave, so we can be called more than once
433       with the same descriptor. This is only required if we didn't dup the
434       file descriptor, but it is OK to do it all the time.
435    */
436    AutoFDSeek as(descriptor);
437
438    /* Allow purgeable iff we own the FD, i.e., in the puregeable and
439       shareable case.
440    */
441    return doDecode(env, stream, padding, bitmapFactoryOptions, weOwnTheFD);
442}
443
444/*  make a deep copy of the asset, and return it as a stream, or NULL if there
445    was an error.
446 */
447static SkStream* copyAssetToStream(Asset* asset) {
448    // if we could "ref/reopen" the asset, we may not need to copy it here
449    off64_t size = asset->seek(0, SEEK_SET);
450    if ((off64_t)-1 == size) {
451        SkDebugf("---- copyAsset: asset rewind failed\n");
452        return NULL;
453    }
454
455    size = asset->getLength();
456    if (size <= 0) {
457        SkDebugf("---- copyAsset: asset->getLength() returned %d\n", size);
458        return NULL;
459    }
460
461    SkStream* stream = new SkMemoryStream(size);
462    void* data = const_cast<void*>(stream->getMemoryBase());
463    off64_t len = asset->read(data, size);
464    if (len != size) {
465        SkDebugf("---- copyAsset: asset->read(%d) returned %d\n", size, len);
466        delete stream;
467        stream = NULL;
468    }
469    return stream;
470}
471
472static jobject nativeDecodeAssetScaled(JNIEnv* env, jobject clazz, jint native_asset,
473        jobject padding, jobject options, jboolean applyScale, jfloat scale) {
474
475    SkStream* stream;
476    Asset* asset = reinterpret_cast<Asset*>(native_asset);
477    bool forcePurgeable = optionsPurgeable(env, options);
478    if (forcePurgeable) {
479        // if we could "ref/reopen" the asset, we may not need to copy it here
480        // and we could assume optionsShareable, since assets are always RO
481        stream = copyAssetToStream(asset);
482        if (stream == NULL) {
483            return NULL;
484        }
485    } else {
486        // since we know we'll be done with the asset when we return, we can
487        // just use a simple wrapper
488        stream = new AssetStreamAdaptor(asset);
489    }
490    SkAutoUnref aur(stream);
491    return doDecode(env, stream, padding, options, true, forcePurgeable, applyScale, scale);
492}
493
494static jobject nativeDecodeAsset(JNIEnv* env, jobject clazz, jint native_asset,
495        jobject padding, jobject options) {
496
497    return nativeDecodeAssetScaled(env, clazz, native_asset, padding, options, false, 1.0f);
498}
499
500static jobject nativeDecodeByteArray(JNIEnv* env, jobject, jbyteArray byteArray,
501        int offset, int length, jobject options) {
502
503    /*  If optionsShareable() we could decide to just wrap the java array and
504        share it, but that means adding a globalref to the java array object
505        and managing its lifetime. For now we just always copy the array's data
506        if optionsPurgeable(), unless we're just decoding bounds.
507     */
508    bool purgeable = optionsPurgeable(env, options) && !optionsJustBounds(env, options);
509    AutoJavaByteArray ar(env, byteArray);
510    SkStream* stream = new SkMemoryStream(ar.ptr() + offset, length, purgeable);
511    SkAutoUnref aur(stream);
512    return doDecode(env, stream, NULL, options, purgeable);
513}
514
515static void nativeRequestCancel(JNIEnv*, jobject joptions) {
516    (void)AutoDecoderCancel::RequestCancel(joptions);
517}
518
519static jboolean nativeIsSeekable(JNIEnv* env, jobject, jobject fileDescriptor) {
520    jint descriptor = jniGetFDFromFileDescriptor(env, fileDescriptor);
521    return ::lseek64(descriptor, 0, SEEK_CUR) != -1 ? JNI_TRUE : JNI_FALSE;
522}
523
524///////////////////////////////////////////////////////////////////////////////
525
526static JNINativeMethod gMethods[] = {
527    {   "nativeDecodeStream",
528        "(Ljava/io/InputStream;[BLandroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;",
529        (void*)nativeDecodeStream
530    },
531    {   "nativeDecodeStream",
532        "(Ljava/io/InputStream;[BLandroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;ZF)Landroid/graphics/Bitmap;",
533        (void*)nativeDecodeStreamScaled
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    {   "nativeDecodeAsset",
547        "(ILandroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;ZF)Landroid/graphics/Bitmap;",
548        (void*)nativeDecodeAssetScaled
549    },
550
551    {   "nativeDecodeByteArray",
552        "([BIILandroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;",
553        (void*)nativeDecodeByteArray
554    },
555
556    {   "nativeScaleNinePatch",
557        "([BFLandroid/graphics/Rect;)[B",
558        (void*)nativeScaleNinePatch
559    },
560
561    {   "nativeIsSeekable",
562        "(Ljava/io/FileDescriptor;)Z",
563        (void*)nativeIsSeekable
564    },
565};
566
567static JNINativeMethod gOptionsMethods[] = {
568    {   "requestCancel", "()V", (void*)nativeRequestCancel }
569};
570
571static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz,
572                                const char fieldname[], const char type[]) {
573    jfieldID id = env->GetFieldID(clazz, fieldname, type);
574    SkASSERT(id);
575    return id;
576}
577
578int register_android_graphics_BitmapFactory(JNIEnv* env) {
579    jclass options_class = env->FindClass("android/graphics/BitmapFactory$Options");
580    SkASSERT(options_class);
581    gOptions_bitmapFieldID = getFieldIDCheck(env, options_class, "inBitmap",
582        "Landroid/graphics/Bitmap;");
583    gOptions_justBoundsFieldID = getFieldIDCheck(env, options_class, "inJustDecodeBounds", "Z");
584    gOptions_sampleSizeFieldID = getFieldIDCheck(env, options_class, "inSampleSize", "I");
585    gOptions_configFieldID = getFieldIDCheck(env, options_class, "inPreferredConfig",
586            "Landroid/graphics/Bitmap$Config;");
587    gOptions_mutableFieldID = getFieldIDCheck(env, options_class, "inMutable", "Z");
588    gOptions_ditherFieldID = getFieldIDCheck(env, options_class, "inDither", "Z");
589    gOptions_purgeableFieldID = getFieldIDCheck(env, options_class, "inPurgeable", "Z");
590    gOptions_shareableFieldID = getFieldIDCheck(env, options_class, "inInputShareable", "Z");
591    gOptions_preferQualityOverSpeedFieldID = getFieldIDCheck(env, options_class,
592            "inPreferQualityOverSpeed", "Z");
593    gOptions_widthFieldID = getFieldIDCheck(env, options_class, "outWidth", "I");
594    gOptions_heightFieldID = getFieldIDCheck(env, options_class, "outHeight", "I");
595    gOptions_mimeFieldID = getFieldIDCheck(env, options_class, "outMimeType", "Ljava/lang/String;");
596    gOptions_mCancelID = getFieldIDCheck(env, options_class, "mCancel", "Z");
597
598    jclass bitmap_class = env->FindClass("android/graphics/Bitmap");
599    SkASSERT(bitmap_class);
600    gBitmap_nativeBitmapFieldID = getFieldIDCheck(env, bitmap_class, "mNativeBitmap", "I");
601    gBitmap_layoutBoundsFieldID = getFieldIDCheck(env, bitmap_class, "mLayoutBounds", "[I");
602    int ret = AndroidRuntime::registerNativeMethods(env,
603                                    "android/graphics/BitmapFactory$Options",
604                                    gOptionsMethods,
605                                    SK_ARRAY_COUNT(gOptionsMethods));
606    if (ret) {
607        return ret;
608    }
609    return android::AndroidRuntime::registerNativeMethods(env, "android/graphics/BitmapFactory",
610                                         gMethods, SK_ARRAY_COUNT(gMethods));
611}
612