Graphics.cpp revision 7384b428c445f07540fd6a80a21727d03be65d96 
1#define LOG_TAG "GraphicsJNI"
2
3#include "jni.h"
4#include "JNIHelp.h"
5#include "GraphicsJNI.h"
6
7#include "SkCanvas.h"
8#include "SkDevice.h"
9#include "SkPicture.h"
10#include "SkRegion.h"
11#include <android_runtime/AndroidRuntime.h>
12
13void doThrowNPE(JNIEnv* env) {
14    jniThrowNullPointerException(env, NULL);
15}
16
17void doThrowAIOOBE(JNIEnv* env) {
18    jniThrowException(env, "java/lang/ArrayIndexOutOfBoundsException", NULL);
19}
20
21void doThrowRE(JNIEnv* env, const char* msg) {
22    jniThrowRuntimeException(env, msg);
23}
24
25void doThrowIAE(JNIEnv* env, const char* msg) {
26    jniThrowException(env, "java/lang/IllegalArgumentException", msg);
27}
28
29void doThrowISE(JNIEnv* env, const char* msg) {
30    jniThrowException(env, "java/lang/IllegalStateException", msg);
31}
32
33void doThrowOOME(JNIEnv* env, const char* msg) {
34    jniThrowException(env, "java/lang/OutOfMemoryError", msg);
35}
36
37void doThrowIOE(JNIEnv* env, const char* msg) {
38    jniThrowException(env, "java/io/IOException", msg);
39}
40
41bool GraphicsJNI::hasException(JNIEnv *env) {
42    if (env->ExceptionCheck() != 0) {
43        ALOGE("*** Uncaught exception returned from Java call!\n");
44        env->ExceptionDescribe();
45        return true;
46    }
47    return false;
48}
49
50///////////////////////////////////////////////////////////////////////////////
51
52AutoJavaFloatArray::AutoJavaFloatArray(JNIEnv* env, jfloatArray array,
53                                       int minLength, JNIAccess access)
54: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
55    SkASSERT(env);
56    if (array) {
57        fLen = env->GetArrayLength(array);
58        if (fLen < minLength) {
59            sk_throw();
60        }
61        fPtr = env->GetFloatArrayElements(array, NULL);
62    }
63    fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0;
64}
65
66AutoJavaFloatArray::~AutoJavaFloatArray() {
67    if (fPtr) {
68        fEnv->ReleaseFloatArrayElements(fArray, fPtr, fReleaseMode);
69    }
70}
71
72AutoJavaIntArray::AutoJavaIntArray(JNIEnv* env, jintArray array,
73                                       int minLength)
74: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
75    SkASSERT(env);
76    if (array) {
77        fLen = env->GetArrayLength(array);
78        if (fLen < minLength) {
79            sk_throw();
80        }
81        fPtr = env->GetIntArrayElements(array, NULL);
82    }
83}
84
85AutoJavaIntArray::~AutoJavaIntArray() {
86    if (fPtr) {
87        fEnv->ReleaseIntArrayElements(fArray, fPtr, 0);
88    }
89}
90
91AutoJavaShortArray::AutoJavaShortArray(JNIEnv* env, jshortArray array,
92                                       int minLength, JNIAccess access)
93: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
94    SkASSERT(env);
95    if (array) {
96        fLen = env->GetArrayLength(array);
97        if (fLen < minLength) {
98            sk_throw();
99        }
100        fPtr = env->GetShortArrayElements(array, NULL);
101    }
102    fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0;
103}
104
105AutoJavaShortArray::~AutoJavaShortArray() {
106    if (fPtr) {
107        fEnv->ReleaseShortArrayElements(fArray, fPtr, fReleaseMode);
108    }
109}
110
111AutoJavaByteArray::AutoJavaByteArray(JNIEnv* env, jbyteArray array,
112                                       int minLength)
113: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
114    SkASSERT(env);
115    if (array) {
116        fLen = env->GetArrayLength(array);
117        if (fLen < minLength) {
118            sk_throw();
119        }
120        fPtr = env->GetByteArrayElements(array, NULL);
121    }
122}
123
124AutoJavaByteArray::~AutoJavaByteArray() {
125    if (fPtr) {
126        fEnv->ReleaseByteArrayElements(fArray, fPtr, 0);
127    }
128}
129
130///////////////////////////////////////////////////////////////////////////////
131
132static jclass   gRect_class;
133static jfieldID gRect_leftFieldID;
134static jfieldID gRect_topFieldID;
135static jfieldID gRect_rightFieldID;
136static jfieldID gRect_bottomFieldID;
137
138static jclass   gRectF_class;
139static jfieldID gRectF_leftFieldID;
140static jfieldID gRectF_topFieldID;
141static jfieldID gRectF_rightFieldID;
142static jfieldID gRectF_bottomFieldID;
143
144static jclass   gPoint_class;
145static jfieldID gPoint_xFieldID;
146static jfieldID gPoint_yFieldID;
147
148static jclass   gPointF_class;
149static jfieldID gPointF_xFieldID;
150static jfieldID gPointF_yFieldID;
151
152static jclass   gBitmap_class;
153static jfieldID gBitmap_nativeInstanceID;
154static jmethodID gBitmap_constructorMethodID;
155
156static jclass   gBitmapConfig_class;
157static jfieldID gBitmapConfig_nativeInstanceID;
158
159static jclass   gBitmapRegionDecoder_class;
160static jmethodID gBitmapRegionDecoder_constructorMethodID;
161
162static jclass   gCanvas_class;
163static jfieldID gCanvas_nativeInstanceID;
164
165static jclass   gPaint_class;
166static jfieldID gPaint_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(SkFloatToScalar(env->GetFloatField(obj, gRectF_leftFieldID)),
229           SkFloatToScalar(env->GetFloatField(obj, gRectF_topFieldID)),
230           SkFloatToScalar(env->GetFloatField(obj, gRectF_rightFieldID)),
231           SkFloatToScalar(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(SkFloatToScalar(env->GetIntField(obj, gPointF_xFieldID)),
278               SkFloatToScalar(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
290SkBitmap* GraphicsJNI::getNativeBitmap(JNIEnv* env, jobject bitmap) {
291    SkASSERT(env);
292    SkASSERT(bitmap);
293    SkASSERT(env->IsInstanceOf(bitmap, gBitmap_class));
294    SkBitmap* b = (SkBitmap*)env->GetIntField(bitmap, gBitmap_nativeInstanceID);
295    SkASSERT(b);
296    return b;
297}
298
299SkBitmap::Config GraphicsJNI::getNativeBitmapConfig(JNIEnv* env,
300                                                    jobject jconfig) {
301    SkASSERT(env);
302    if (NULL == jconfig) {
303        return SkBitmap::kNo_Config;
304    }
305    SkASSERT(env->IsInstanceOf(jconfig, gBitmapConfig_class));
306    int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID);
307    if (c < 0 || c >= SkBitmap::kConfigCount) {
308        c = SkBitmap::kNo_Config;
309    }
310    return static_cast<SkBitmap::Config>(c);
311}
312
313SkCanvas* GraphicsJNI::getNativeCanvas(JNIEnv* env, jobject canvas) {
314    SkASSERT(env);
315    SkASSERT(canvas);
316    SkASSERT(env->IsInstanceOf(canvas, gCanvas_class));
317    SkCanvas* c = (SkCanvas*)env->GetIntField(canvas, gCanvas_nativeInstanceID);
318    SkASSERT(c);
319    return c;
320}
321
322SkPaint* GraphicsJNI::getNativePaint(JNIEnv* env, jobject paint) {
323    SkASSERT(env);
324    SkASSERT(paint);
325    SkASSERT(env->IsInstanceOf(paint, gPaint_class));
326    SkPaint* p = (SkPaint*)env->GetIntField(paint, gPaint_nativeInstanceID);
327    SkASSERT(p);
328    return p;
329}
330
331SkPicture* GraphicsJNI::getNativePicture(JNIEnv* env, jobject picture)
332{
333    SkASSERT(env);
334    SkASSERT(picture);
335    SkASSERT(env->IsInstanceOf(picture, gPicture_class));
336    SkPicture* p = (SkPicture*)env->GetIntField(picture, gPicture_nativeInstanceID);
337    SkASSERT(p);
338    return p;
339}
340
341SkRegion* GraphicsJNI::getNativeRegion(JNIEnv* env, jobject region)
342{
343    SkASSERT(env);
344    SkASSERT(region);
345    SkASSERT(env->IsInstanceOf(region, gRegion_class));
346    SkRegion* r = (SkRegion*)env->GetIntField(region, gRegion_nativeInstanceID);
347    SkASSERT(r);
348    return r;
349}
350
351///////////////////////////////////////////////////////////////////////////////////////////
352
353jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, jbyteArray buffer,
354                                  bool isMutable, jbyteArray ninepatch, jintArray layoutbounds,
355                                  int density)
356{
357    SkASSERT(bitmap);
358    SkASSERT(bitmap->pixelRef());
359    jobject obj = env->NewObject(gBitmap_class, gBitmap_constructorMethodID,
360            static_cast<jint>(reinterpret_cast<uintptr_t>(bitmap)),
361            buffer, isMutable, ninepatch, layoutbounds, density);
362    hasException(env); // For the side effect of logging.
363    return obj;
364}
365
366jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, bool isMutable,
367                            jbyteArray ninepatch, int density)
368{
369    return createBitmap(env, bitmap, NULL, isMutable, ninepatch, NULL, density);
370}
371
372
373jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap)
374{
375    SkASSERT(bitmap != NULL);
376
377    jobject obj = env->NewObject(gBitmapRegionDecoder_class,
378            gBitmapRegionDecoder_constructorMethodID,
379            static_cast<jint>(reinterpret_cast<uintptr_t>(bitmap)));
380    hasException(env); // For the side effect of logging.
381    return obj;
382}
383
384jobject GraphicsJNI::createRegion(JNIEnv* env, SkRegion* region)
385{
386    SkASSERT(region != NULL);
387    jobject obj = env->NewObject(gRegion_class, gRegion_constructorMethodID,
388            static_cast<jint>(reinterpret_cast<uintptr_t>(region)), 0);
389    hasException(env); // For the side effect of logging.
390    return obj;
391}
392
393static JNIEnv* vm2env(JavaVM* vm)
394{
395    JNIEnv* env = NULL;
396    if (vm->GetEnv((void**)&env, JNI_VERSION_1_4) != JNI_OK || NULL == env)
397    {
398        SkDebugf("------- [%p] vm->GetEnv() failed\n", vm);
399        sk_throw();
400    }
401    return env;
402}
403
404///////////////////////////////////////////////////////////////////////////////
405
406AndroidPixelRef::AndroidPixelRef(JNIEnv* env, void* storage, size_t size, jbyteArray storageObj,
407        SkColorTable* ctable) : SkMallocPixelRef(storage, size, ctable) {
408    SkASSERT(storage);
409    SkASSERT(env);
410
411    if (env->GetJavaVM(&fVM) != JNI_OK) {
412        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
413        sk_throw();
414    }
415    fStorageObj = storageObj;
416    fHasGlobalRef = false;
417    fGlobalRefCnt = 0;
418
419    // If storageObj is NULL, the memory was NOT allocated on the Java heap
420    fOnJavaHeap = (storageObj != NULL);
421
422}
423
424AndroidPixelRef::~AndroidPixelRef() {
425    if (fOnJavaHeap) {
426        JNIEnv* env = vm2env(fVM);
427
428        if (fStorageObj && fHasGlobalRef) {
429            env->DeleteGlobalRef(fStorageObj);
430        }
431        fStorageObj = NULL;
432
433        // Set this to NULL to prevent the SkMallocPixelRef destructor
434        // from freeing the memory.
435        fStorage = NULL;
436    }
437}
438
439void AndroidPixelRef::setLocalJNIRef(jbyteArray arr) {
440    if (!fHasGlobalRef) {
441        fStorageObj = arr;
442    }
443}
444
445void AndroidPixelRef::globalRef(void* localref) {
446    if (fOnJavaHeap && sk_atomic_inc(&fGlobalRefCnt) == 0) {
447        JNIEnv *env = vm2env(fVM);
448
449        // If JNI ref was passed, it is always used
450        if (localref) fStorageObj = (jbyteArray) localref;
451
452        if (fStorageObj == NULL) {
453            SkDebugf("No valid local ref to create a JNI global ref\n");
454            sk_throw();
455        }
456        if (fHasGlobalRef) {
457            // This should never happen
458            SkDebugf("Already holding a JNI global ref");
459            sk_throw();
460        }
461
462        fStorageObj = (jbyteArray) env->NewGlobalRef(fStorageObj);
463        // TODO: Check for failure here
464        fHasGlobalRef = true;
465    }
466    ref();
467}
468
469void AndroidPixelRef::globalUnref() {
470    if (fOnJavaHeap && sk_atomic_dec(&fGlobalRefCnt) == 1) {
471        JNIEnv *env = vm2env(fVM);
472        if (!fHasGlobalRef) {
473            SkDebugf("We don't have a global ref!");
474            sk_throw();
475        }
476        env->DeleteGlobalRef(fStorageObj);
477        fStorageObj = NULL;
478        fHasGlobalRef = false;
479    }
480    unref();
481}
482
483///////////////////////////////////////////////////////////////////////////////
484
485jbyteArray GraphicsJNI::allocateJavaPixelRef(JNIEnv* env, SkBitmap* bitmap,
486                                             SkColorTable* ctable) {
487    Sk64 size64 = bitmap->getSize64();
488    if (size64.isNeg() || !size64.is32()) {
489        jniThrowException(env, "java/lang/IllegalArgumentException",
490                          "bitmap size exceeds 32bits");
491        return NULL;
492    }
493    size_t size = size64.get32();
494    jbyteArray arrayObj = (jbyteArray) env->CallObjectMethod(gVMRuntime,
495                                                             gVMRuntime_newNonMovableArray,
496                                                             gByte_class, size);
497    if (arrayObj) {
498        jbyte* addr = (jbyte*)env->CallLongMethod(gVMRuntime, gVMRuntime_addressOf, arrayObj);
499        if (addr) {
500            SkPixelRef* pr = new AndroidPixelRef(env, (void*) addr, size, arrayObj, ctable);
501            bitmap->setPixelRef(pr)->unref();
502            // since we're already allocated, we lockPixels right away
503            // HeapAllocator behaves this way too
504            bitmap->lockPixels();
505        }
506    }
507
508    return arrayObj;
509}
510
511///////////////////////////////////////////////////////////////////////////////
512
513JavaPixelAllocator::JavaPixelAllocator(JNIEnv* env)
514    : fStorageObj(NULL),
515      fAllocCount(0) {
516    if (env->GetJavaVM(&fVM) != JNI_OK) {
517        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
518        sk_throw();
519    }
520}
521
522bool JavaPixelAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
523    JNIEnv* env = vm2env(fVM);
524
525    fStorageObj = GraphicsJNI::allocateJavaPixelRef(env, bitmap, ctable);
526    fAllocCount += 1;
527    return fStorageObj != NULL;
528}
529
530////////////////////////////////////////////////////////////////////////////////
531
532JavaHeapBitmapRef::JavaHeapBitmapRef(JNIEnv* env, SkBitmap* nativeBitmap, jbyteArray buffer) {
533    fEnv = env;
534    fNativeBitmap = nativeBitmap;
535    fBuffer = buffer;
536
537    // If the buffer is NULL, the backing memory wasn't allocated on the Java heap
538    if (fBuffer) {
539        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(fBuffer);
540    }
541}
542
543JavaHeapBitmapRef::~JavaHeapBitmapRef() {
544    if (fBuffer) {
545        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(NULL);
546    }
547}
548
549////////////////////////////////////////////////////////////////////////////////
550
551static jclass make_globalref(JNIEnv* env, const char classname[])
552{
553    jclass c = env->FindClass(classname);
554    SkASSERT(c);
555    return (jclass)env->NewGlobalRef(c);
556}
557
558static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz,
559                                const char fieldname[], const char type[])
560{
561    jfieldID id = env->GetFieldID(clazz, fieldname, type);
562    SkASSERT(id);
563    return id;
564}
565
566int register_android_graphics_Graphics(JNIEnv* env)
567{
568    jmethodID m;
569    jclass c;
570
571    gRect_class = make_globalref(env, "android/graphics/Rect");
572    gRect_leftFieldID = getFieldIDCheck(env, gRect_class, "left", "I");
573    gRect_topFieldID = getFieldIDCheck(env, gRect_class, "top", "I");
574    gRect_rightFieldID = getFieldIDCheck(env, gRect_class, "right", "I");
575    gRect_bottomFieldID = getFieldIDCheck(env, gRect_class, "bottom", "I");
576
577    gRectF_class = make_globalref(env, "android/graphics/RectF");
578    gRectF_leftFieldID = getFieldIDCheck(env, gRectF_class, "left", "F");
579    gRectF_topFieldID = getFieldIDCheck(env, gRectF_class, "top", "F");
580    gRectF_rightFieldID = getFieldIDCheck(env, gRectF_class, "right", "F");
581    gRectF_bottomFieldID = getFieldIDCheck(env, gRectF_class, "bottom", "F");
582
583    gPoint_class = make_globalref(env, "android/graphics/Point");
584    gPoint_xFieldID = getFieldIDCheck(env, gPoint_class, "x", "I");
585    gPoint_yFieldID = getFieldIDCheck(env, gPoint_class, "y", "I");
586
587    gPointF_class = make_globalref(env, "android/graphics/PointF");
588    gPointF_xFieldID = getFieldIDCheck(env, gPointF_class, "x", "F");
589    gPointF_yFieldID = getFieldIDCheck(env, gPointF_class, "y", "F");
590
591    gBitmap_class = make_globalref(env, "android/graphics/Bitmap");
592    gBitmap_nativeInstanceID = getFieldIDCheck(env, gBitmap_class, "mNativeBitmap", "I");
593    gBitmap_constructorMethodID = env->GetMethodID(gBitmap_class, "<init>",
594                                            "(I[BZ[B[II)V");
595    gBitmapRegionDecoder_class = make_globalref(env, "android/graphics/BitmapRegionDecoder");
596    gBitmapRegionDecoder_constructorMethodID = env->GetMethodID(gBitmapRegionDecoder_class, "<init>", "(I)V");
597
598    gBitmapConfig_class = make_globalref(env, "android/graphics/Bitmap$Config");
599    gBitmapConfig_nativeInstanceID = getFieldIDCheck(env, gBitmapConfig_class,
600                                                     "nativeInt", "I");
601
602    gCanvas_class = make_globalref(env, "android/graphics/Canvas");
603    gCanvas_nativeInstanceID = getFieldIDCheck(env, gCanvas_class, "mNativeCanvas", "I");
604
605    gPaint_class = make_globalref(env, "android/graphics/Paint");
606    gPaint_nativeInstanceID = getFieldIDCheck(env, gPaint_class, "mNativePaint", "I");
607
608    gPicture_class = make_globalref(env, "android/graphics/Picture");
609    gPicture_nativeInstanceID = getFieldIDCheck(env, gPicture_class, "mNativePicture", "I");
610
611    gRegion_class = make_globalref(env, "android/graphics/Region");
612    gRegion_nativeInstanceID = getFieldIDCheck(env, gRegion_class, "mNativeRegion", "I");
613    gRegion_constructorMethodID = env->GetMethodID(gRegion_class, "<init>",
614        "(II)V");
615
616    c = env->FindClass("java/lang/Byte");
617    gByte_class = (jclass)env->NewGlobalRef(
618        env->GetStaticObjectField(c, env->GetStaticFieldID(c, "TYPE", "Ljava/lang/Class;")));
619
620    gVMRuntime_class = make_globalref(env, "dalvik/system/VMRuntime");
621    m = env->GetStaticMethodID(gVMRuntime_class, "getRuntime", "()Ldalvik/system/VMRuntime;");
622    gVMRuntime = env->NewGlobalRef(env->CallStaticObjectMethod(gVMRuntime_class, m));
623    gVMRuntime_newNonMovableArray = env->GetMethodID(gVMRuntime_class, "newNonMovableArray",
624                                                     "(Ljava/lang/Class;I)Ljava/lang/Object;");
625    gVMRuntime_addressOf = env->GetMethodID(gVMRuntime_class, "addressOf", "(Ljava/lang/Object;)J");
626
627    return 0;
628}
629