Graphics.cpp revision 2ecdfc2a331ee38d4494377330721d93e9f77ced 
1#define LOG_TAG "GraphicsJNI"
2
3#include <unistd.h>
4#include <sys/mman.h>
5
6#include "jni.h"
7#include "JNIHelp.h"
8#include "GraphicsJNI.h"
9
10#include "SkCanvas.h"
11#include "SkMath.h"
12#include "SkRegion.h"
13#include <android_runtime/AndroidRuntime.h>
14#include <cutils/ashmem.h>
15#include <hwui/Canvas.h>
16
17#include <Caches.h>
18#include <TextureCache.h>
19
20void doThrowNPE(JNIEnv* env) {
21    jniThrowNullPointerException(env, NULL);
22}
23
24void doThrowAIOOBE(JNIEnv* env) {
25    jniThrowException(env, "java/lang/ArrayIndexOutOfBoundsException", NULL);
26}
27
28void doThrowRE(JNIEnv* env, const char* msg) {
29    jniThrowRuntimeException(env, msg);
30}
31
32void doThrowIAE(JNIEnv* env, const char* msg) {
33    jniThrowException(env, "java/lang/IllegalArgumentException", msg);
34}
35
36void doThrowISE(JNIEnv* env, const char* msg) {
37    jniThrowException(env, "java/lang/IllegalStateException", msg);
38}
39
40void doThrowOOME(JNIEnv* env, const char* msg) {
41    jniThrowException(env, "java/lang/OutOfMemoryError", msg);
42}
43
44void doThrowIOE(JNIEnv* env, const char* msg) {
45    jniThrowException(env, "java/io/IOException", msg);
46}
47
48bool GraphicsJNI::hasException(JNIEnv *env) {
49    if (env->ExceptionCheck() != 0) {
50        ALOGE("*** Uncaught exception returned from Java call!\n");
51        env->ExceptionDescribe();
52        return true;
53    }
54    return false;
55}
56
57///////////////////////////////////////////////////////////////////////////////
58
59AutoJavaFloatArray::AutoJavaFloatArray(JNIEnv* env, jfloatArray array,
60                                       int minLength, JNIAccess access)
61: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
62    SkASSERT(env);
63    if (array) {
64        fLen = env->GetArrayLength(array);
65        if (fLen < minLength) {
66            sk_throw();
67        }
68        fPtr = env->GetFloatArrayElements(array, NULL);
69    }
70    fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0;
71}
72
73AutoJavaFloatArray::~AutoJavaFloatArray() {
74    if (fPtr) {
75        fEnv->ReleaseFloatArrayElements(fArray, fPtr, fReleaseMode);
76    }
77}
78
79AutoJavaIntArray::AutoJavaIntArray(JNIEnv* env, jintArray array,
80                                       int minLength)
81: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
82    SkASSERT(env);
83    if (array) {
84        fLen = env->GetArrayLength(array);
85        if (fLen < minLength) {
86            sk_throw();
87        }
88        fPtr = env->GetIntArrayElements(array, NULL);
89    }
90}
91
92AutoJavaIntArray::~AutoJavaIntArray() {
93    if (fPtr) {
94        fEnv->ReleaseIntArrayElements(fArray, fPtr, 0);
95    }
96}
97
98AutoJavaShortArray::AutoJavaShortArray(JNIEnv* env, jshortArray array,
99                                       int minLength, JNIAccess access)
100: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
101    SkASSERT(env);
102    if (array) {
103        fLen = env->GetArrayLength(array);
104        if (fLen < minLength) {
105            sk_throw();
106        }
107        fPtr = env->GetShortArrayElements(array, NULL);
108    }
109    fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0;
110}
111
112AutoJavaShortArray::~AutoJavaShortArray() {
113    if (fPtr) {
114        fEnv->ReleaseShortArrayElements(fArray, fPtr, fReleaseMode);
115    }
116}
117
118AutoJavaByteArray::AutoJavaByteArray(JNIEnv* env, jbyteArray array,
119                                       int minLength)
120: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
121    SkASSERT(env);
122    if (array) {
123        fLen = env->GetArrayLength(array);
124        if (fLen < minLength) {
125            sk_throw();
126        }
127        fPtr = env->GetByteArrayElements(array, NULL);
128    }
129}
130
131AutoJavaByteArray::~AutoJavaByteArray() {
132    if (fPtr) {
133        fEnv->ReleaseByteArrayElements(fArray, fPtr, 0);
134    }
135}
136
137///////////////////////////////////////////////////////////////////////////////
138
139static jclass   gRect_class;
140static jfieldID gRect_leftFieldID;
141static jfieldID gRect_topFieldID;
142static jfieldID gRect_rightFieldID;
143static jfieldID gRect_bottomFieldID;
144
145static jclass   gRectF_class;
146static jfieldID gRectF_leftFieldID;
147static jfieldID gRectF_topFieldID;
148static jfieldID gRectF_rightFieldID;
149static jfieldID gRectF_bottomFieldID;
150
151static jclass   gPoint_class;
152static jfieldID gPoint_xFieldID;
153static jfieldID gPoint_yFieldID;
154
155static jclass   gPointF_class;
156static jfieldID gPointF_xFieldID;
157static jfieldID gPointF_yFieldID;
158
159static jclass   gBitmapConfig_class;
160static jfieldID gBitmapConfig_nativeInstanceID;
161
162static jclass   gBitmapRegionDecoder_class;
163static jmethodID gBitmapRegionDecoder_constructorMethodID;
164
165static jclass   gCanvas_class;
166static jfieldID gCanvas_nativeInstanceID;
167
168static jclass   gPicture_class;
169static jfieldID gPicture_nativeInstanceID;
170
171static jclass   gRegion_class;
172static jfieldID gRegion_nativeInstanceID;
173static jmethodID gRegion_constructorMethodID;
174
175static jclass    gByte_class;
176static jobject   gVMRuntime;
177static jclass    gVMRuntime_class;
178static jmethodID gVMRuntime_newNonMovableArray;
179static jmethodID gVMRuntime_addressOf;
180
181///////////////////////////////////////////////////////////////////////////////
182
183void GraphicsJNI::get_jrect(JNIEnv* env, jobject obj, int* L, int* T, int* R, int* B)
184{
185    SkASSERT(env->IsInstanceOf(obj, gRect_class));
186
187    *L = env->GetIntField(obj, gRect_leftFieldID);
188    *T = env->GetIntField(obj, gRect_topFieldID);
189    *R = env->GetIntField(obj, gRect_rightFieldID);
190    *B = env->GetIntField(obj, gRect_bottomFieldID);
191}
192
193void GraphicsJNI::set_jrect(JNIEnv* env, jobject obj, int L, int T, int R, int B)
194{
195    SkASSERT(env->IsInstanceOf(obj, gRect_class));
196
197    env->SetIntField(obj, gRect_leftFieldID, L);
198    env->SetIntField(obj, gRect_topFieldID, T);
199    env->SetIntField(obj, gRect_rightFieldID, R);
200    env->SetIntField(obj, gRect_bottomFieldID, B);
201}
202
203SkIRect* GraphicsJNI::jrect_to_irect(JNIEnv* env, jobject obj, SkIRect* ir)
204{
205    SkASSERT(env->IsInstanceOf(obj, gRect_class));
206
207    ir->set(env->GetIntField(obj, gRect_leftFieldID),
208            env->GetIntField(obj, gRect_topFieldID),
209            env->GetIntField(obj, gRect_rightFieldID),
210            env->GetIntField(obj, gRect_bottomFieldID));
211    return ir;
212}
213
214void GraphicsJNI::irect_to_jrect(const SkIRect& ir, JNIEnv* env, jobject obj)
215{
216    SkASSERT(env->IsInstanceOf(obj, gRect_class));
217
218    env->SetIntField(obj, gRect_leftFieldID, ir.fLeft);
219    env->SetIntField(obj, gRect_topFieldID, ir.fTop);
220    env->SetIntField(obj, gRect_rightFieldID, ir.fRight);
221    env->SetIntField(obj, gRect_bottomFieldID, ir.fBottom);
222}
223
224SkRect* GraphicsJNI::jrectf_to_rect(JNIEnv* env, jobject obj, SkRect* r)
225{
226    SkASSERT(env->IsInstanceOf(obj, gRectF_class));
227
228    r->set(env->GetFloatField(obj, gRectF_leftFieldID),
229           env->GetFloatField(obj, gRectF_topFieldID),
230           env->GetFloatField(obj, gRectF_rightFieldID),
231           env->GetFloatField(obj, gRectF_bottomFieldID));
232    return r;
233}
234
235SkRect* GraphicsJNI::jrect_to_rect(JNIEnv* env, jobject obj, SkRect* r)
236{
237    SkASSERT(env->IsInstanceOf(obj, gRect_class));
238
239    r->set(SkIntToScalar(env->GetIntField(obj, gRect_leftFieldID)),
240           SkIntToScalar(env->GetIntField(obj, gRect_topFieldID)),
241           SkIntToScalar(env->GetIntField(obj, gRect_rightFieldID)),
242           SkIntToScalar(env->GetIntField(obj, gRect_bottomFieldID)));
243    return r;
244}
245
246void GraphicsJNI::rect_to_jrectf(const SkRect& r, JNIEnv* env, jobject obj)
247{
248    SkASSERT(env->IsInstanceOf(obj, gRectF_class));
249
250    env->SetFloatField(obj, gRectF_leftFieldID, SkScalarToFloat(r.fLeft));
251    env->SetFloatField(obj, gRectF_topFieldID, SkScalarToFloat(r.fTop));
252    env->SetFloatField(obj, gRectF_rightFieldID, SkScalarToFloat(r.fRight));
253    env->SetFloatField(obj, gRectF_bottomFieldID, SkScalarToFloat(r.fBottom));
254}
255
256SkIPoint* GraphicsJNI::jpoint_to_ipoint(JNIEnv* env, jobject obj, SkIPoint* point)
257{
258    SkASSERT(env->IsInstanceOf(obj, gPoint_class));
259
260    point->set(env->GetIntField(obj, gPoint_xFieldID),
261               env->GetIntField(obj, gPoint_yFieldID));
262    return point;
263}
264
265void GraphicsJNI::ipoint_to_jpoint(const SkIPoint& ir, JNIEnv* env, jobject obj)
266{
267    SkASSERT(env->IsInstanceOf(obj, gPoint_class));
268
269    env->SetIntField(obj, gPoint_xFieldID, ir.fX);
270    env->SetIntField(obj, gPoint_yFieldID, ir.fY);
271}
272
273SkPoint* GraphicsJNI::jpointf_to_point(JNIEnv* env, jobject obj, SkPoint* point)
274{
275    SkASSERT(env->IsInstanceOf(obj, gPointF_class));
276
277    point->set(env->GetIntField(obj, gPointF_xFieldID),
278               env->GetIntField(obj, gPointF_yFieldID));
279    return point;
280}
281
282void GraphicsJNI::point_to_jpointf(const SkPoint& r, JNIEnv* env, jobject obj)
283{
284    SkASSERT(env->IsInstanceOf(obj, gPointF_class));
285
286    env->SetFloatField(obj, gPointF_xFieldID, SkScalarToFloat(r.fX));
287    env->SetFloatField(obj, gPointF_yFieldID, SkScalarToFloat(r.fY));
288}
289
290// See enum values in GraphicsJNI.h
291jint GraphicsJNI::colorTypeToLegacyBitmapConfig(SkColorType colorType) {
292    switch (colorType) {
293        case kRGBA_F16_SkColorType:
294            return kRGBA_16F_LegacyBitmapConfig;
295        case kN32_SkColorType:
296            return kARGB_8888_LegacyBitmapConfig;
297        case kARGB_4444_SkColorType:
298            return kARGB_4444_LegacyBitmapConfig;
299        case kRGB_565_SkColorType:
300            return kRGB_565_LegacyBitmapConfig;
301        case kIndex_8_SkColorType:
302            return kIndex8_LegacyBitmapConfig;
303        case kAlpha_8_SkColorType:
304            return kA8_LegacyBitmapConfig;
305        case kUnknown_SkColorType:
306        default:
307            break;
308    }
309    return kNo_LegacyBitmapConfig;
310}
311
312SkColorType GraphicsJNI::legacyBitmapConfigToColorType(jint legacyConfig) {
313    const uint8_t gConfig2ColorType[] = {
314        kUnknown_SkColorType,
315        kAlpha_8_SkColorType,
316        kIndex_8_SkColorType,
317        kRGB_565_SkColorType,
318        kARGB_4444_SkColorType,
319        kN32_SkColorType,
320        kRGBA_F16_SkColorType,
321        kN32_SkColorType
322    };
323
324    if (legacyConfig < 0 || legacyConfig > kLastEnum_LegacyBitmapConfig) {
325        legacyConfig = kNo_LegacyBitmapConfig;
326    }
327    return static_cast<SkColorType>(gConfig2ColorType[legacyConfig]);
328}
329
330void GraphicsJNI::getSkBitmap(JNIEnv* env, jobject bitmap, SkBitmap* outBitmap) {
331    android::bitmap::toBitmap(env, bitmap).getSkBitmap(outBitmap);
332}
333
334SkPixelRef* GraphicsJNI::refSkPixelRef(JNIEnv* env, jobject jbitmap) {
335    android::Bitmap& bitmap = android::bitmap::toBitmap(env, jbitmap);
336    bitmap.ref();
337    return &bitmap;
338}
339SkColorType GraphicsJNI::getNativeBitmapColorType(JNIEnv* env, jobject jconfig) {
340    SkASSERT(env);
341    if (NULL == jconfig) {
342        return kUnknown_SkColorType;
343    }
344    SkASSERT(env->IsInstanceOf(jconfig, gBitmapConfig_class));
345    int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID);
346    return legacyBitmapConfigToColorType(c);
347}
348
349bool GraphicsJNI::isHardwareConfig(JNIEnv* env, jobject jconfig) {
350    SkASSERT(env);
351    if (NULL == jconfig) {
352        return false;
353    }
354    int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID);
355    return c == kHardware_LegacyBitmapConfig;
356}
357
358jint GraphicsJNI::hardwareLegacyBitmapConfig() {
359    return kHardware_LegacyBitmapConfig;
360}
361
362android::Canvas* GraphicsJNI::getNativeCanvas(JNIEnv* env, jobject canvas) {
363    SkASSERT(env);
364    SkASSERT(canvas);
365    SkASSERT(env->IsInstanceOf(canvas, gCanvas_class));
366    jlong canvasHandle = env->GetLongField(canvas, gCanvas_nativeInstanceID);
367    if (!canvasHandle) {
368        return NULL;
369    }
370    return reinterpret_cast<android::Canvas*>(canvasHandle);
371}
372
373SkRegion* GraphicsJNI::getNativeRegion(JNIEnv* env, jobject region)
374{
375    SkASSERT(env);
376    SkASSERT(region);
377    SkASSERT(env->IsInstanceOf(region, gRegion_class));
378    jlong regionHandle = env->GetLongField(region, gRegion_nativeInstanceID);
379    SkRegion* r = reinterpret_cast<SkRegion*>(regionHandle);
380    SkASSERT(r);
381    return r;
382}
383
384///////////////////////////////////////////////////////////////////////////////////////////
385
386jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap)
387{
388    SkASSERT(bitmap != NULL);
389
390    jobject obj = env->NewObject(gBitmapRegionDecoder_class,
391            gBitmapRegionDecoder_constructorMethodID,
392            reinterpret_cast<jlong>(bitmap));
393    hasException(env); // For the side effect of logging.
394    return obj;
395}
396
397jobject GraphicsJNI::createRegion(JNIEnv* env, SkRegion* region)
398{
399    SkASSERT(region != NULL);
400    jobject obj = env->NewObject(gRegion_class, gRegion_constructorMethodID,
401                                 reinterpret_cast<jlong>(region), 0);
402    hasException(env); // For the side effect of logging.
403    return obj;
404}
405
406///////////////////////////////////////////////////////////////////////////////
407
408android::Bitmap* GraphicsJNI::mapAshmemBitmap(JNIEnv* env, SkBitmap* bitmap,
409        SkColorTable* ctable, int fd, void* addr, size_t size, bool readOnly) {
410    const SkImageInfo& info = bitmap->info();
411    if (info.colorType() == kUnknown_SkColorType) {
412        doThrowIAE(env, "unknown bitmap configuration");
413        return nullptr;
414    }
415
416    if (!addr) {
417        // Map existing ashmem region if not already mapped.
418        int flags = readOnly ? (PROT_READ) : (PROT_READ | PROT_WRITE);
419        size = ashmem_get_size_region(fd);
420        addr = mmap(NULL, size, flags, MAP_SHARED, fd, 0);
421        if (addr == MAP_FAILED) {
422            return nullptr;
423        }
424    }
425
426    // we must respect the rowBytes value already set on the bitmap instead of
427    // attempting to compute our own.
428    const size_t rowBytes = bitmap->rowBytes();
429
430    auto wrapper = new android::Bitmap(addr, fd, size, info, rowBytes, ctable);
431    wrapper->getSkBitmap(bitmap);
432    if (readOnly) {
433        bitmap->pixelRef()->setImmutable();
434    }
435    // since we're already allocated, we lockPixels right away
436    // HeapAllocator behaves this way too
437    bitmap->lockPixels();
438
439    return wrapper;
440}
441
442sk_sp<SkColorSpace> GraphicsJNI::defaultColorSpace() {
443#ifdef ANDROID_ENABLE_LINEAR_BLENDING
444    return SkColorSpace::MakeSRGB();
445#else
446    return nullptr;
447#endif
448}
449
450sk_sp<SkColorSpace> GraphicsJNI::linearColorSpace() {
451    return SkColorSpace::MakeSRGBLinear();
452}
453
454sk_sp<SkColorSpace> GraphicsJNI::colorSpaceForType(SkColorType type) {
455    switch (type) {
456        case kRGBA_F16_SkColorType:
457            return linearColorSpace();
458        default:
459            return defaultColorSpace();
460    }
461}
462
463bool GraphicsJNI::isColorSpaceSRGB(SkColorSpace* colorSpace) {
464    return colorSpace == nullptr || colorSpace->isSRGB();
465}
466
467///////////////////////////////////////////////////////////////////////////////
468bool HeapAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
469    mStorage = android::Bitmap::allocateHeapBitmap(bitmap, ctable);
470    return !!mStorage;
471}
472
473////////////////////////////////////////////////////////////////////////////////
474
475RecyclingClippingPixelAllocator::RecyclingClippingPixelAllocator(
476        android::Bitmap* recycledBitmap, size_t recycledBytes)
477    : mRecycledBitmap(recycledBitmap)
478    , mRecycledBytes(recycledBytes)
479    , mSkiaBitmap(nullptr)
480    , mNeedsCopy(false)
481{}
482
483RecyclingClippingPixelAllocator::~RecyclingClippingPixelAllocator() {}
484
485bool RecyclingClippingPixelAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
486    // Ensure that the caller did not pass in a NULL bitmap to the constructor or this
487    // function.
488    LOG_ALWAYS_FATAL_IF(!mRecycledBitmap);
489    LOG_ALWAYS_FATAL_IF(!bitmap);
490    mSkiaBitmap = bitmap;
491
492    // This behaves differently than the RecyclingPixelAllocator.  For backwards
493    // compatibility, the original color type of the recycled bitmap must be maintained.
494    if (mRecycledBitmap->info().colorType() != bitmap->colorType()) {
495        return false;
496    }
497
498    // The Skia bitmap specifies the width and height needed by the decoder.
499    // mRecycledBitmap specifies the width and height of the bitmap that we
500    // want to reuse.  Neither can be changed.  We will try to find a way
501    // to reuse the memory.
502    const int maxWidth = SkTMax(bitmap->width(), mRecycledBitmap->info().width());
503    const int maxHeight = SkTMax(bitmap->height(), mRecycledBitmap->info().height());
504    const SkImageInfo maxInfo = bitmap->info().makeWH(maxWidth, maxHeight);
505    const size_t rowBytes = maxInfo.minRowBytes();
506    const size_t bytesNeeded = maxInfo.getSafeSize(rowBytes);
507    if (bytesNeeded <= mRecycledBytes) {
508        // Here we take advantage of reconfigure() to reset the rowBytes and ctable
509        // of mRecycledBitmap.  It is very important that we pass in
510        // mRecycledBitmap->info() for the SkImageInfo.  According to the
511        // specification for BitmapRegionDecoder, we are not allowed to change
512        // the SkImageInfo.
513        mRecycledBitmap->reconfigure(mRecycledBitmap->info(), rowBytes, ctable);
514
515        // Give the bitmap the same pixelRef as mRecycledBitmap.
516        // skbug.com/4538: We also need to make sure that the rowBytes on the pixel ref
517        //                 match the rowBytes on the bitmap.
518        bitmap->setInfo(bitmap->info(), rowBytes);
519        mRecycledBitmap->ref();
520        bitmap->setPixelRef(mRecycledBitmap)->unref();
521
522        // Make sure that the recycled bitmap has the correct alpha type.
523        mRecycledBitmap->setAlphaType(bitmap->alphaType());
524
525        bitmap->notifyPixelsChanged();
526        bitmap->lockPixels();
527        mNeedsCopy = false;
528
529        // TODO: If the dimensions of the SkBitmap are smaller than those of
530        // mRecycledBitmap, should we zero the memory in mRecycledBitmap?
531        return true;
532    }
533
534    // In the event that mRecycledBitmap is not large enough, allocate new memory
535    // on the heap.
536    SkBitmap::HeapAllocator heapAllocator;
537
538    // We will need to copy from heap memory to mRecycledBitmap's memory after the
539    // decode is complete.
540    mNeedsCopy = true;
541
542    return heapAllocator.allocPixelRef(bitmap, ctable);
543}
544
545void RecyclingClippingPixelAllocator::copyIfNecessary() {
546    if (mNeedsCopy) {
547        mRecycledBitmap->ref();
548        SkPixelRef* recycledPixels = mRecycledBitmap;
549        void* dst = recycledPixels->pixels();
550        const size_t dstRowBytes = mRecycledBitmap->rowBytes();
551        const size_t bytesToCopy = std::min(mRecycledBitmap->info().minRowBytes(),
552                mSkiaBitmap->info().minRowBytes());
553        const int rowsToCopy = std::min(mRecycledBitmap->info().height(),
554                mSkiaBitmap->info().height());
555        for (int y = 0; y < rowsToCopy; y++) {
556            memcpy(dst, mSkiaBitmap->getAddr(0, y), bytesToCopy);
557            dst = SkTAddOffset<void>(dst, dstRowBytes);
558        }
559        recycledPixels->notifyPixelsChanged();
560        recycledPixels->unref();
561    }
562    mRecycledBitmap = nullptr;
563    mSkiaBitmap = nullptr;
564}
565
566////////////////////////////////////////////////////////////////////////////////
567
568AshmemPixelAllocator::AshmemPixelAllocator(JNIEnv *env) {
569    LOG_ALWAYS_FATAL_IF(env->GetJavaVM(&mJavaVM) != JNI_OK,
570            "env->GetJavaVM failed");
571}
572
573bool AshmemPixelAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
574    mStorage = android::Bitmap::allocateAshmemBitmap(bitmap, ctable);
575    return !!mStorage;
576}
577
578////////////////////////////////////////////////////////////////////////////////
579
580static jclass make_globalref(JNIEnv* env, const char classname[])
581{
582    jclass c = env->FindClass(classname);
583    SkASSERT(c);
584    return (jclass) env->NewGlobalRef(c);
585}
586
587static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz,
588                                const char fieldname[], const char type[])
589{
590    jfieldID id = env->GetFieldID(clazz, fieldname, type);
591    SkASSERT(id);
592    return id;
593}
594
595int register_android_graphics_Graphics(JNIEnv* env)
596{
597    jmethodID m;
598    jclass c;
599
600    gRect_class = make_globalref(env, "android/graphics/Rect");
601    gRect_leftFieldID = getFieldIDCheck(env, gRect_class, "left", "I");
602    gRect_topFieldID = getFieldIDCheck(env, gRect_class, "top", "I");
603    gRect_rightFieldID = getFieldIDCheck(env, gRect_class, "right", "I");
604    gRect_bottomFieldID = getFieldIDCheck(env, gRect_class, "bottom", "I");
605
606    gRectF_class = make_globalref(env, "android/graphics/RectF");
607    gRectF_leftFieldID = getFieldIDCheck(env, gRectF_class, "left", "F");
608    gRectF_topFieldID = getFieldIDCheck(env, gRectF_class, "top", "F");
609    gRectF_rightFieldID = getFieldIDCheck(env, gRectF_class, "right", "F");
610    gRectF_bottomFieldID = getFieldIDCheck(env, gRectF_class, "bottom", "F");
611
612    gPoint_class = make_globalref(env, "android/graphics/Point");
613    gPoint_xFieldID = getFieldIDCheck(env, gPoint_class, "x", "I");
614    gPoint_yFieldID = getFieldIDCheck(env, gPoint_class, "y", "I");
615
616    gPointF_class = make_globalref(env, "android/graphics/PointF");
617    gPointF_xFieldID = getFieldIDCheck(env, gPointF_class, "x", "F");
618    gPointF_yFieldID = getFieldIDCheck(env, gPointF_class, "y", "F");
619
620    gBitmapRegionDecoder_class = make_globalref(env, "android/graphics/BitmapRegionDecoder");
621    gBitmapRegionDecoder_constructorMethodID = env->GetMethodID(gBitmapRegionDecoder_class, "<init>", "(J)V");
622
623    gBitmapConfig_class = make_globalref(env, "android/graphics/Bitmap$Config");
624    gBitmapConfig_nativeInstanceID = getFieldIDCheck(env, gBitmapConfig_class,
625                                                     "nativeInt", "I");
626
627    gCanvas_class = make_globalref(env, "android/graphics/Canvas");
628    gCanvas_nativeInstanceID = getFieldIDCheck(env, gCanvas_class, "mNativeCanvasWrapper", "J");
629
630    gPicture_class = make_globalref(env, "android/graphics/Picture");
631    gPicture_nativeInstanceID = getFieldIDCheck(env, gPicture_class, "mNativePicture", "J");
632
633    gRegion_class = make_globalref(env, "android/graphics/Region");
634    gRegion_nativeInstanceID = getFieldIDCheck(env, gRegion_class, "mNativeRegion", "J");
635    gRegion_constructorMethodID = env->GetMethodID(gRegion_class, "<init>",
636        "(JI)V");
637
638    c = env->FindClass("java/lang/Byte");
639    gByte_class = (jclass) env->NewGlobalRef(
640        env->GetStaticObjectField(c, env->GetStaticFieldID(c, "TYPE", "Ljava/lang/Class;")));
641
642    gVMRuntime_class = make_globalref(env, "dalvik/system/VMRuntime");
643    m = env->GetStaticMethodID(gVMRuntime_class, "getRuntime", "()Ldalvik/system/VMRuntime;");
644    gVMRuntime = env->NewGlobalRef(env->CallStaticObjectMethod(gVMRuntime_class, m));
645    gVMRuntime_newNonMovableArray = env->GetMethodID(gVMRuntime_class, "newNonMovableArray",
646                                                     "(Ljava/lang/Class;I)Ljava/lang/Object;");
647    gVMRuntime_addressOf = env->GetMethodID(gVMRuntime_class, "addressOf", "(Ljava/lang/Object;)J");
648
649    return 0;
650}
651