1#define LOG_TAG "BitmapFactory"
2
3#include "BitmapFactory.h"
4#include "NinePatchPeeker.h"
5#include "SkFrontBufferedStream.h"
6#include "SkImageDecoder.h"
7#include "SkMath.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#include "GraphicsJNI.h"
17
18#include <android_runtime/AndroidRuntime.h>
19#include <androidfw/Asset.h>
20#include <androidfw/ResourceTypes.h>
21#include <cutils/compiler.h>
22#include <netinet/in.h>
23#include <stdio.h>
24#include <sys/mman.h>
25#include <sys/stat.h>
26
27jfieldID gOptions_justBoundsFieldID;
28jfieldID gOptions_sampleSizeFieldID;
29jfieldID gOptions_configFieldID;
30jfieldID gOptions_premultipliedFieldID;
31jfieldID gOptions_mutableFieldID;
32jfieldID gOptions_ditherFieldID;
33jfieldID gOptions_preferQualityOverSpeedFieldID;
34jfieldID gOptions_scaledFieldID;
35jfieldID gOptions_densityFieldID;
36jfieldID gOptions_screenDensityFieldID;
37jfieldID gOptions_targetDensityFieldID;
38jfieldID gOptions_widthFieldID;
39jfieldID gOptions_heightFieldID;
40jfieldID gOptions_mimeFieldID;
41jfieldID gOptions_mCancelID;
42jfieldID gOptions_bitmapFieldID;
43
44jfieldID gBitmap_nativeBitmapFieldID;
45jfieldID gBitmap_ninePatchInsetsFieldID;
46
47jclass gInsetStruct_class;
48jmethodID gInsetStruct_constructorMethodID;
49
50using namespace android;
51
52static inline int32_t validOrNeg1(bool isValid, int32_t value) {
53//    return isValid ? value : -1;
54    SkASSERT((int)isValid == 0 || (int)isValid == 1);
55    return ((int32_t)isValid - 1) | value;
56}
57
58jstring getMimeTypeString(JNIEnv* env, SkImageDecoder::Format format) {
59    static const struct {
60        SkImageDecoder::Format fFormat;
61        const char*            fMimeType;
62    } gMimeTypes[] = {
63        { SkImageDecoder::kBMP_Format,  "image/bmp" },
64        { SkImageDecoder::kGIF_Format,  "image/gif" },
65        { SkImageDecoder::kICO_Format,  "image/x-ico" },
66        { SkImageDecoder::kJPEG_Format, "image/jpeg" },
67        { SkImageDecoder::kPNG_Format,  "image/png" },
68        { SkImageDecoder::kWEBP_Format, "image/webp" },
69        { SkImageDecoder::kWBMP_Format, "image/vnd.wap.wbmp" }
70    };
71
72    const char* cstr = NULL;
73    for (size_t i = 0; i < SK_ARRAY_COUNT(gMimeTypes); i++) {
74        if (gMimeTypes[i].fFormat == format) {
75            cstr = gMimeTypes[i].fMimeType;
76            break;
77        }
78    }
79
80    jstring jstr = NULL;
81    if (cstr != NULL) {
82        // NOTE: Caller should env->ExceptionCheck() for OOM
83        // (can't check for NULL as it's a valid return value)
84        jstr = env->NewStringUTF(cstr);
85    }
86    return jstr;
87}
88
89static bool optionsJustBounds(JNIEnv* env, jobject options) {
90    return options != NULL && env->GetBooleanField(options, gOptions_justBoundsFieldID);
91}
92
93static void scaleDivRange(int32_t* divs, int count, float scale, int maxValue) {
94    for (int i = 0; i < count; i++) {
95        divs[i] = int32_t(divs[i] * scale + 0.5f);
96        if (i > 0 && divs[i] == divs[i - 1]) {
97            divs[i]++; // avoid collisions
98        }
99    }
100
101    if (CC_UNLIKELY(divs[count - 1] > maxValue)) {
102        // if the collision avoidance above put some divs outside the bounds of the bitmap,
103        // slide outer stretchable divs inward to stay within bounds
104        int highestAvailable = maxValue;
105        for (int i = count - 1; i >= 0; i--) {
106            divs[i] = highestAvailable;
107            if (i > 0 && divs[i] <= divs[i-1]){
108                // keep shifting
109                highestAvailable = divs[i] - 1;
110            } else {
111                break;
112            }
113        }
114    }
115}
116
117static void scaleNinePatchChunk(android::Res_png_9patch* chunk, float scale,
118        int scaledWidth, int scaledHeight) {
119    chunk->paddingLeft = int(chunk->paddingLeft * scale + 0.5f);
120    chunk->paddingTop = int(chunk->paddingTop * scale + 0.5f);
121    chunk->paddingRight = int(chunk->paddingRight * scale + 0.5f);
122    chunk->paddingBottom = int(chunk->paddingBottom * scale + 0.5f);
123
124    scaleDivRange(chunk->getXDivs(), chunk->numXDivs, scale, scaledWidth);
125    scaleDivRange(chunk->getYDivs(), chunk->numYDivs, scale, scaledHeight);
126}
127
128static SkColorType colorTypeForScaledOutput(SkColorType colorType) {
129    switch (colorType) {
130        case kUnknown_SkColorType:
131        case kIndex_8_SkColorType:
132            return kN32_SkColorType;
133        default:
134            break;
135    }
136    return colorType;
137}
138
139class ScaleCheckingAllocator : public SkBitmap::HeapAllocator {
140public:
141    ScaleCheckingAllocator(float scale, int size)
142            : mScale(scale), mSize(size) {
143    }
144
145    virtual bool allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
146        // accounts for scale in final allocation, using eventual size and config
147        const int bytesPerPixel = SkColorTypeBytesPerPixel(
148                colorTypeForScaledOutput(bitmap->colorType()));
149        const int requestedSize = bytesPerPixel *
150                int(bitmap->width() * mScale + 0.5f) *
151                int(bitmap->height() * mScale + 0.5f);
152        if (requestedSize > mSize) {
153            ALOGW("bitmap for alloc reuse (%d bytes) can't fit scaled bitmap (%d bytes)",
154                    mSize, requestedSize);
155            return false;
156        }
157        return SkBitmap::HeapAllocator::allocPixelRef(bitmap, ctable);
158    }
159private:
160    const float mScale;
161    const int mSize;
162};
163
164class RecyclingPixelAllocator : public SkBitmap::Allocator {
165public:
166    RecyclingPixelAllocator(SkPixelRef* pixelRef, unsigned int size)
167            : mPixelRef(pixelRef), mSize(size) {
168        SkSafeRef(mPixelRef);
169    }
170
171    ~RecyclingPixelAllocator() {
172        SkSafeUnref(mPixelRef);
173    }
174
175    virtual bool allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
176        const SkImageInfo& info = bitmap->info();
177        if (info.fColorType == kUnknown_SkColorType) {
178            ALOGW("unable to reuse a bitmap as the target has an unknown bitmap configuration");
179            return false;
180        }
181
182        const int64_t size64 = info.getSafeSize64(bitmap->rowBytes());
183        if (!sk_64_isS32(size64)) {
184            ALOGW("bitmap is too large");
185            return false;
186        }
187
188        const size_t size = sk_64_asS32(size64);
189        if (size > mSize) {
190            ALOGW("bitmap marked for reuse (%d bytes) can't fit new bitmap (%d bytes)",
191                    mSize, size);
192            return false;
193        }
194
195        // Create a new pixelref with the new ctable that wraps the previous pixelref
196        SkPixelRef* pr = new AndroidPixelRef(*static_cast<AndroidPixelRef*>(mPixelRef),
197                info, bitmap->rowBytes(), ctable);
198
199        bitmap->setPixelRef(pr)->unref();
200        // since we're already allocated, we lockPixels right away
201        // HeapAllocator/JavaPixelAllocator behaves this way too
202        bitmap->lockPixels();
203        return true;
204    }
205
206private:
207    SkPixelRef* const mPixelRef;
208    const unsigned int mSize;
209};
210
211static jobject doDecode(JNIEnv* env, SkStreamRewindable* stream, jobject padding, jobject options) {
212
213    int sampleSize = 1;
214
215    SkImageDecoder::Mode decodeMode = SkImageDecoder::kDecodePixels_Mode;
216    SkColorType prefColorType = kN32_SkColorType;
217
218    bool doDither = true;
219    bool isMutable = false;
220    float scale = 1.0f;
221    bool preferQualityOverSpeed = false;
222    bool requireUnpremultiplied = false;
223
224    jobject javaBitmap = NULL;
225
226    if (options != NULL) {
227        sampleSize = env->GetIntField(options, gOptions_sampleSizeFieldID);
228        if (optionsJustBounds(env, options)) {
229            decodeMode = SkImageDecoder::kDecodeBounds_Mode;
230        }
231
232        // initialize these, in case we fail later on
233        env->SetIntField(options, gOptions_widthFieldID, -1);
234        env->SetIntField(options, gOptions_heightFieldID, -1);
235        env->SetObjectField(options, gOptions_mimeFieldID, 0);
236
237        jobject jconfig = env->GetObjectField(options, gOptions_configFieldID);
238        prefColorType = GraphicsJNI::getNativeBitmapColorType(env, jconfig);
239        isMutable = env->GetBooleanField(options, gOptions_mutableFieldID);
240        doDither = env->GetBooleanField(options, gOptions_ditherFieldID);
241        preferQualityOverSpeed = env->GetBooleanField(options,
242                gOptions_preferQualityOverSpeedFieldID);
243        requireUnpremultiplied = !env->GetBooleanField(options, gOptions_premultipliedFieldID);
244        javaBitmap = env->GetObjectField(options, gOptions_bitmapFieldID);
245
246        if (env->GetBooleanField(options, gOptions_scaledFieldID)) {
247            const int density = env->GetIntField(options, gOptions_densityFieldID);
248            const int targetDensity = env->GetIntField(options, gOptions_targetDensityFieldID);
249            const int screenDensity = env->GetIntField(options, gOptions_screenDensityFieldID);
250            if (density != 0 && targetDensity != 0 && density != screenDensity) {
251                scale = (float) targetDensity / density;
252            }
253        }
254    }
255
256    const bool willScale = scale != 1.0f;
257
258    SkImageDecoder* decoder = SkImageDecoder::Factory(stream);
259    if (decoder == NULL) {
260        return nullObjectReturn("SkImageDecoder::Factory returned null");
261    }
262
263    decoder->setSampleSize(sampleSize);
264    decoder->setDitherImage(doDither);
265    decoder->setPreferQualityOverSpeed(preferQualityOverSpeed);
266    decoder->setRequireUnpremultipliedColors(requireUnpremultiplied);
267
268    SkBitmap* outputBitmap = NULL;
269    unsigned int existingBufferSize = 0;
270    if (javaBitmap != NULL) {
271        outputBitmap = (SkBitmap*) env->GetLongField(javaBitmap, gBitmap_nativeBitmapFieldID);
272        if (outputBitmap->isImmutable()) {
273            ALOGW("Unable to reuse an immutable bitmap as an image decoder target.");
274            javaBitmap = NULL;
275            outputBitmap = NULL;
276        } else {
277            existingBufferSize = GraphicsJNI::getBitmapAllocationByteCount(env, javaBitmap);
278        }
279    }
280
281    SkAutoTDelete<SkBitmap> adb(outputBitmap == NULL ? new SkBitmap : NULL);
282    if (outputBitmap == NULL) outputBitmap = adb.get();
283
284    NinePatchPeeker peeker(decoder);
285    decoder->setPeeker(&peeker);
286
287    JavaPixelAllocator javaAllocator(env);
288    RecyclingPixelAllocator recyclingAllocator(outputBitmap->pixelRef(), existingBufferSize);
289    ScaleCheckingAllocator scaleCheckingAllocator(scale, existingBufferSize);
290    SkBitmap::Allocator* outputAllocator = (javaBitmap != NULL) ?
291            (SkBitmap::Allocator*)&recyclingAllocator : (SkBitmap::Allocator*)&javaAllocator;
292    if (decodeMode != SkImageDecoder::kDecodeBounds_Mode) {
293        if (!willScale) {
294            // If the java allocator is being used to allocate the pixel memory, the decoder
295            // need not write zeroes, since the memory is initialized to 0.
296            decoder->setSkipWritingZeroes(outputAllocator == &javaAllocator);
297            decoder->setAllocator(outputAllocator);
298        } else if (javaBitmap != NULL) {
299            // check for eventual scaled bounds at allocation time, so we don't decode the bitmap
300            // only to find the scaled result too large to fit in the allocation
301            decoder->setAllocator(&scaleCheckingAllocator);
302        }
303    }
304
305    // Only setup the decoder to be deleted after its stack-based, refcounted
306    // components (allocators, peekers, etc) are declared. This prevents RefCnt
307    // asserts from firing due to the order objects are deleted from the stack.
308    SkAutoTDelete<SkImageDecoder> add(decoder);
309
310    AutoDecoderCancel adc(options, decoder);
311
312    // To fix the race condition in case "requestCancelDecode"
313    // happens earlier than AutoDecoderCancel object is added
314    // to the gAutoDecoderCancelMutex linked list.
315    if (options != NULL && env->GetBooleanField(options, gOptions_mCancelID)) {
316        return nullObjectReturn("gOptions_mCancelID");
317    }
318
319    SkBitmap decodingBitmap;
320    if (decoder->decode(stream, &decodingBitmap, prefColorType, decodeMode)
321                != SkImageDecoder::kSuccess) {
322        return nullObjectReturn("decoder->decode returned false");
323    }
324
325    int scaledWidth = decodingBitmap.width();
326    int scaledHeight = decodingBitmap.height();
327
328    if (willScale && decodeMode != SkImageDecoder::kDecodeBounds_Mode) {
329        scaledWidth = int(scaledWidth * scale + 0.5f);
330        scaledHeight = int(scaledHeight * scale + 0.5f);
331    }
332
333    // update options (if any)
334    if (options != NULL) {
335        jstring mimeType = getMimeTypeString(env, decoder->getFormat());
336        if (env->ExceptionCheck()) {
337            return nullObjectReturn("OOM in getMimeTypeString()");
338        }
339        env->SetIntField(options, gOptions_widthFieldID, scaledWidth);
340        env->SetIntField(options, gOptions_heightFieldID, scaledHeight);
341        env->SetObjectField(options, gOptions_mimeFieldID, mimeType);
342    }
343
344    // if we're in justBounds mode, return now (skip the java bitmap)
345    if (decodeMode == SkImageDecoder::kDecodeBounds_Mode) {
346        return NULL;
347    }
348
349    jbyteArray ninePatchChunk = NULL;
350    if (peeker.mPatch != NULL) {
351        if (willScale) {
352            scaleNinePatchChunk(peeker.mPatch, scale, scaledWidth, scaledHeight);
353        }
354
355        size_t ninePatchArraySize = peeker.mPatch->serializedSize();
356        ninePatchChunk = env->NewByteArray(ninePatchArraySize);
357        if (ninePatchChunk == NULL) {
358            return nullObjectReturn("ninePatchChunk == null");
359        }
360
361        jbyte* array = (jbyte*) env->GetPrimitiveArrayCritical(ninePatchChunk, NULL);
362        if (array == NULL) {
363            return nullObjectReturn("primitive array == null");
364        }
365
366        memcpy(array, peeker.mPatch, peeker.mPatchSize);
367        env->ReleasePrimitiveArrayCritical(ninePatchChunk, array, 0);
368    }
369
370    jobject ninePatchInsets = NULL;
371    if (peeker.mHasInsets) {
372        ninePatchInsets = env->NewObject(gInsetStruct_class, gInsetStruct_constructorMethodID,
373                peeker.mOpticalInsets[0], peeker.mOpticalInsets[1], peeker.mOpticalInsets[2], peeker.mOpticalInsets[3],
374                peeker.mOutlineInsets[0], peeker.mOutlineInsets[1], peeker.mOutlineInsets[2], peeker.mOutlineInsets[3],
375                peeker.mOutlineRadius, peeker.mOutlineAlpha, scale);
376        if (ninePatchInsets == NULL) {
377            return nullObjectReturn("nine patch insets == null");
378        }
379        if (javaBitmap != NULL) {
380            env->SetObjectField(javaBitmap, gBitmap_ninePatchInsetsFieldID, ninePatchInsets);
381        }
382    }
383
384    if (willScale) {
385        // This is weird so let me explain: we could use the scale parameter
386        // directly, but for historical reasons this is how the corresponding
387        // Dalvik code has always behaved. We simply recreate the behavior here.
388        // The result is slightly different from simply using scale because of
389        // the 0.5f rounding bias applied when computing the target image size
390        const float sx = scaledWidth / float(decodingBitmap.width());
391        const float sy = scaledHeight / float(decodingBitmap.height());
392
393        // TODO: avoid copying when scaled size equals decodingBitmap size
394        SkColorType colorType = colorTypeForScaledOutput(decodingBitmap.colorType());
395        // FIXME: If the alphaType is kUnpremul and the image has alpha, the
396        // colors may not be correct, since Skia does not yet support drawing
397        // to/from unpremultiplied bitmaps.
398        outputBitmap->setInfo(SkImageInfo::Make(scaledWidth, scaledHeight,
399                colorType, decodingBitmap.alphaType()));
400        if (!outputBitmap->allocPixels(outputAllocator, NULL)) {
401            return nullObjectReturn("allocation failed for scaled bitmap");
402        }
403
404        // If outputBitmap's pixels are newly allocated by Java, there is no need
405        // to erase to 0, since the pixels were initialized to 0.
406        if (outputAllocator != &javaAllocator) {
407            outputBitmap->eraseColor(0);
408        }
409
410        SkPaint paint;
411        paint.setFilterLevel(SkPaint::kLow_FilterLevel);
412
413        SkCanvas canvas(*outputBitmap);
414        canvas.scale(sx, sy);
415        canvas.drawBitmap(decodingBitmap, 0.0f, 0.0f, &paint);
416    } else {
417        outputBitmap->swap(decodingBitmap);
418    }
419
420    if (padding) {
421        if (peeker.mPatch != NULL) {
422            GraphicsJNI::set_jrect(env, padding,
423                    peeker.mPatch->paddingLeft, peeker.mPatch->paddingTop,
424                    peeker.mPatch->paddingRight, peeker.mPatch->paddingBottom);
425        } else {
426            GraphicsJNI::set_jrect(env, padding, -1, -1, -1, -1);
427        }
428    }
429
430    // if we get here, we're in kDecodePixels_Mode and will therefore
431    // already have a pixelref installed.
432    if (outputBitmap->pixelRef() == NULL) {
433        return nullObjectReturn("Got null SkPixelRef");
434    }
435
436    if (!isMutable && javaBitmap == NULL) {
437        // promise we will never change our pixels (great for sharing and pictures)
438        outputBitmap->setImmutable();
439    }
440
441    // detach bitmap from its autodeleter, since we want to own it now
442    adb.detach();
443
444    if (javaBitmap != NULL) {
445        bool isPremultiplied = !requireUnpremultiplied;
446        GraphicsJNI::reinitBitmap(env, javaBitmap, outputBitmap, isPremultiplied);
447        outputBitmap->notifyPixelsChanged();
448        // If a java bitmap was passed in for reuse, pass it back
449        return javaBitmap;
450    }
451
452    int bitmapCreateFlags = 0x0;
453    if (isMutable) bitmapCreateFlags |= GraphicsJNI::kBitmapCreateFlag_Mutable;
454    if (!requireUnpremultiplied) bitmapCreateFlags |= GraphicsJNI::kBitmapCreateFlag_Premultiplied;
455
456    // now create the java bitmap
457    return GraphicsJNI::createBitmap(env, outputBitmap, javaAllocator.getStorageObj(),
458            bitmapCreateFlags, ninePatchChunk, ninePatchInsets, -1);
459}
460
461// Need to buffer enough input to be able to rewind as much as might be read by a decoder
462// trying to determine the stream's format. Currently the most is 64, read by
463// SkImageDecoder_libwebp.
464// FIXME: Get this number from SkImageDecoder
465#define BYTES_TO_BUFFER 64
466
467static jobject nativeDecodeStream(JNIEnv* env, jobject clazz, jobject is, jbyteArray storage,
468        jobject padding, jobject options) {
469
470    jobject bitmap = NULL;
471    SkAutoTUnref<SkStream> stream(CreateJavaInputStreamAdaptor(env, is, storage));
472
473    if (stream.get()) {
474        SkAutoTUnref<SkStreamRewindable> bufferedStream(
475                SkFrontBufferedStream::Create(stream, BYTES_TO_BUFFER));
476        SkASSERT(bufferedStream.get() != NULL);
477        bitmap = doDecode(env, bufferedStream, padding, options);
478    }
479    return bitmap;
480}
481
482static jobject nativeDecodeFileDescriptor(JNIEnv* env, jobject clazz, jobject fileDescriptor,
483        jobject padding, jobject bitmapFactoryOptions) {
484
485    NPE_CHECK_RETURN_ZERO(env, fileDescriptor);
486
487    int descriptor = jniGetFDFromFileDescriptor(env, fileDescriptor);
488
489    struct stat fdStat;
490    if (fstat(descriptor, &fdStat) == -1) {
491        doThrowIOE(env, "broken file descriptor");
492        return nullObjectReturn("fstat return -1");
493    }
494
495    // Restore the descriptor's offset on exiting this function. Even though
496    // we dup the descriptor, both the original and dup refer to the same open
497    // file description and changes to the file offset in one impact the other.
498    AutoFDSeek autoRestore(descriptor);
499
500    // Duplicate the descriptor here to prevent leaking memory. A leak occurs
501    // if we only close the file descriptor and not the file object it is used to
502    // create.  If we don't explicitly clean up the file (which in turn closes the
503    // descriptor) the buffers allocated internally by fseek will be leaked.
504    int dupDescriptor = dup(descriptor);
505
506    FILE* file = fdopen(dupDescriptor, "r");
507    if (file == NULL) {
508        // cleanup the duplicated descriptor since it will not be closed when the
509        // file is cleaned up (fclose).
510        close(dupDescriptor);
511        return nullObjectReturn("Could not open file");
512    }
513
514    SkAutoTUnref<SkFILEStream> fileStream(new SkFILEStream(file,
515                         SkFILEStream::kCallerPasses_Ownership));
516
517    // Use a buffered stream. Although an SkFILEStream can be rewound, this
518    // ensures that SkImageDecoder::Factory never rewinds beyond the
519    // current position of the file descriptor.
520    SkAutoTUnref<SkStreamRewindable> stream(SkFrontBufferedStream::Create(fileStream,
521            BYTES_TO_BUFFER));
522
523    return doDecode(env, stream, padding, bitmapFactoryOptions);
524}
525
526static jobject nativeDecodeAsset(JNIEnv* env, jobject clazz, jlong native_asset,
527        jobject padding, jobject options) {
528
529    Asset* asset = reinterpret_cast<Asset*>(native_asset);
530    // since we know we'll be done with the asset when we return, we can
531    // just use a simple wrapper
532    SkAutoTUnref<SkStreamRewindable> stream(new AssetStreamAdaptor(asset,
533            AssetStreamAdaptor::kNo_OwnAsset, AssetStreamAdaptor::kNo_HasMemoryBase));
534    return doDecode(env, stream, padding, options);
535}
536
537static jobject nativeDecodeByteArray(JNIEnv* env, jobject, jbyteArray byteArray,
538        jint offset, jint length, jobject options) {
539
540    AutoJavaByteArray ar(env, byteArray);
541    SkMemoryStream* stream = new SkMemoryStream(ar.ptr() + offset, length, false);
542    SkAutoUnref aur(stream);
543    return doDecode(env, stream, NULL, options);
544}
545
546static void nativeRequestCancel(JNIEnv*, jobject joptions) {
547    (void)AutoDecoderCancel::RequestCancel(joptions);
548}
549
550static jboolean nativeIsSeekable(JNIEnv* env, jobject, jobject fileDescriptor) {
551    jint descriptor = jniGetFDFromFileDescriptor(env, fileDescriptor);
552    return ::lseek64(descriptor, 0, SEEK_CUR) != -1 ? JNI_TRUE : JNI_FALSE;
553}
554
555///////////////////////////////////////////////////////////////////////////////
556
557static JNINativeMethod gMethods[] = {
558    {   "nativeDecodeStream",
559        "(Ljava/io/InputStream;[BLandroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;",
560        (void*)nativeDecodeStream
561    },
562
563    {   "nativeDecodeFileDescriptor",
564        "(Ljava/io/FileDescriptor;Landroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;",
565        (void*)nativeDecodeFileDescriptor
566    },
567
568    {   "nativeDecodeAsset",
569        "(JLandroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;",
570        (void*)nativeDecodeAsset
571    },
572
573    {   "nativeDecodeByteArray",
574        "([BIILandroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;",
575        (void*)nativeDecodeByteArray
576    },
577
578    {   "nativeIsSeekable",
579        "(Ljava/io/FileDescriptor;)Z",
580        (void*)nativeIsSeekable
581    },
582};
583
584static JNINativeMethod gOptionsMethods[] = {
585    {   "requestCancel", "()V", (void*)nativeRequestCancel }
586};
587
588static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz,
589                                const char fieldname[], const char type[]) {
590    jfieldID id = env->GetFieldID(clazz, fieldname, type);
591    SkASSERT(id);
592    return id;
593}
594
595int register_android_graphics_BitmapFactory(JNIEnv* env) {
596    jclass options_class = env->FindClass("android/graphics/BitmapFactory$Options");
597    SkASSERT(options_class);
598    gOptions_bitmapFieldID = getFieldIDCheck(env, options_class, "inBitmap",
599            "Landroid/graphics/Bitmap;");
600    gOptions_justBoundsFieldID = getFieldIDCheck(env, options_class, "inJustDecodeBounds", "Z");
601    gOptions_sampleSizeFieldID = getFieldIDCheck(env, options_class, "inSampleSize", "I");
602    gOptions_configFieldID = getFieldIDCheck(env, options_class, "inPreferredConfig",
603            "Landroid/graphics/Bitmap$Config;");
604    gOptions_premultipliedFieldID = getFieldIDCheck(env, options_class, "inPremultiplied", "Z");
605    gOptions_mutableFieldID = getFieldIDCheck(env, options_class, "inMutable", "Z");
606    gOptions_ditherFieldID = getFieldIDCheck(env, options_class, "inDither", "Z");
607    gOptions_preferQualityOverSpeedFieldID = getFieldIDCheck(env, options_class,
608            "inPreferQualityOverSpeed", "Z");
609    gOptions_scaledFieldID = getFieldIDCheck(env, options_class, "inScaled", "Z");
610    gOptions_densityFieldID = getFieldIDCheck(env, options_class, "inDensity", "I");
611    gOptions_screenDensityFieldID = getFieldIDCheck(env, options_class, "inScreenDensity", "I");
612    gOptions_targetDensityFieldID = getFieldIDCheck(env, options_class, "inTargetDensity", "I");
613    gOptions_widthFieldID = getFieldIDCheck(env, options_class, "outWidth", "I");
614    gOptions_heightFieldID = getFieldIDCheck(env, options_class, "outHeight", "I");
615    gOptions_mimeFieldID = getFieldIDCheck(env, options_class, "outMimeType", "Ljava/lang/String;");
616    gOptions_mCancelID = getFieldIDCheck(env, options_class, "mCancel", "Z");
617
618    jclass bitmap_class = env->FindClass("android/graphics/Bitmap");
619    SkASSERT(bitmap_class);
620    gBitmap_nativeBitmapFieldID = getFieldIDCheck(env, bitmap_class, "mNativeBitmap", "J");
621    gBitmap_ninePatchInsetsFieldID = getFieldIDCheck(env, bitmap_class, "mNinePatchInsets",
622            "Landroid/graphics/NinePatch$InsetStruct;");
623
624    gInsetStruct_class = (jclass) env->NewGlobalRef(env->FindClass("android/graphics/NinePatch$InsetStruct"));
625    gInsetStruct_constructorMethodID = env->GetMethodID(gInsetStruct_class, "<init>", "(IIIIIIIIFIF)V");
626
627    int ret = AndroidRuntime::registerNativeMethods(env,
628                                    "android/graphics/BitmapFactory$Options",
629                                    gOptionsMethods,
630                                    SK_ARRAY_COUNT(gOptionsMethods));
631    if (ret) {
632        return ret;
633    }
634    return android::AndroidRuntime::registerNativeMethods(env, "android/graphics/BitmapFactory",
635                                         gMethods, SK_ARRAY_COUNT(gMethods));
636}
637