Graphics.cpp revision 71487eb0ceb2b7dea02649e78d99bb5952f5eaef 
1#define LOG_TAG "GraphicsJNI"
2
3#include "jni.h"
4#include "JNIHelp.h"
5#include "GraphicsJNI.h"
6
7#include "Canvas.h"
8#include "SkCanvas.h"
9#include "SkDevice.h"
10#include "SkMath.h"
11#include "SkRegion.h"
12#include <android_runtime/AndroidRuntime.h>
13
14void doThrowNPE(JNIEnv* env) {
15    jniThrowNullPointerException(env, NULL);
16}
17
18void doThrowAIOOBE(JNIEnv* env) {
19    jniThrowException(env, "java/lang/ArrayIndexOutOfBoundsException", NULL);
20}
21
22void doThrowRE(JNIEnv* env, const char* msg) {
23    jniThrowRuntimeException(env, msg);
24}
25
26void doThrowIAE(JNIEnv* env, const char* msg) {
27    jniThrowException(env, "java/lang/IllegalArgumentException", msg);
28}
29
30void doThrowISE(JNIEnv* env, const char* msg) {
31    jniThrowException(env, "java/lang/IllegalStateException", msg);
32}
33
34void doThrowOOME(JNIEnv* env, const char* msg) {
35    jniThrowException(env, "java/lang/OutOfMemoryError", msg);
36}
37
38void doThrowIOE(JNIEnv* env, const char* msg) {
39    jniThrowException(env, "java/io/IOException", msg);
40}
41
42bool GraphicsJNI::hasException(JNIEnv *env) {
43    if (env->ExceptionCheck() != 0) {
44        ALOGE("*** Uncaught exception returned from Java call!\n");
45        env->ExceptionDescribe();
46        return true;
47    }
48    return false;
49}
50
51///////////////////////////////////////////////////////////////////////////////
52
53AutoJavaFloatArray::AutoJavaFloatArray(JNIEnv* env, jfloatArray array,
54                                       int minLength, JNIAccess access)
55: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
56    SkASSERT(env);
57    if (array) {
58        fLen = env->GetArrayLength(array);
59        if (fLen < minLength) {
60            sk_throw();
61        }
62        fPtr = env->GetFloatArrayElements(array, NULL);
63    }
64    fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0;
65}
66
67AutoJavaFloatArray::~AutoJavaFloatArray() {
68    if (fPtr) {
69        fEnv->ReleaseFloatArrayElements(fArray, fPtr, fReleaseMode);
70    }
71}
72
73AutoJavaIntArray::AutoJavaIntArray(JNIEnv* env, jintArray array,
74                                       int minLength)
75: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
76    SkASSERT(env);
77    if (array) {
78        fLen = env->GetArrayLength(array);
79        if (fLen < minLength) {
80            sk_throw();
81        }
82        fPtr = env->GetIntArrayElements(array, NULL);
83    }
84}
85
86AutoJavaIntArray::~AutoJavaIntArray() {
87    if (fPtr) {
88        fEnv->ReleaseIntArrayElements(fArray, fPtr, 0);
89    }
90}
91
92AutoJavaShortArray::AutoJavaShortArray(JNIEnv* env, jshortArray array,
93                                       int minLength, JNIAccess access)
94: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
95    SkASSERT(env);
96    if (array) {
97        fLen = env->GetArrayLength(array);
98        if (fLen < minLength) {
99            sk_throw();
100        }
101        fPtr = env->GetShortArrayElements(array, NULL);
102    }
103    fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0;
104}
105
106AutoJavaShortArray::~AutoJavaShortArray() {
107    if (fPtr) {
108        fEnv->ReleaseShortArrayElements(fArray, fPtr, fReleaseMode);
109    }
110}
111
112AutoJavaByteArray::AutoJavaByteArray(JNIEnv* env, jbyteArray array,
113                                       int minLength)
114: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
115    SkASSERT(env);
116    if (array) {
117        fLen = env->GetArrayLength(array);
118        if (fLen < minLength) {
119            sk_throw();
120        }
121        fPtr = env->GetByteArrayElements(array, NULL);
122    }
123}
124
125AutoJavaByteArray::~AutoJavaByteArray() {
126    if (fPtr) {
127        fEnv->ReleaseByteArrayElements(fArray, fPtr, 0);
128    }
129}
130
131///////////////////////////////////////////////////////////////////////////////
132
133static jclass   gRect_class;
134static jfieldID gRect_leftFieldID;
135static jfieldID gRect_topFieldID;
136static jfieldID gRect_rightFieldID;
137static jfieldID gRect_bottomFieldID;
138
139static jclass   gRectF_class;
140static jfieldID gRectF_leftFieldID;
141static jfieldID gRectF_topFieldID;
142static jfieldID gRectF_rightFieldID;
143static jfieldID gRectF_bottomFieldID;
144
145static jclass   gPoint_class;
146static jfieldID gPoint_xFieldID;
147static jfieldID gPoint_yFieldID;
148
149static jclass   gPointF_class;
150static jfieldID gPointF_xFieldID;
151static jfieldID gPointF_yFieldID;
152
153static jclass   gBitmap_class;
154static jfieldID gBitmap_nativeInstanceID;
155static jmethodID gBitmap_constructorMethodID;
156static jmethodID gBitmap_reinitMethodID;
157static jmethodID gBitmap_getAllocationByteCountMethodID;
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// This enum must keep these int values, to match the int values
291// in the java Bitmap.Config enum.
292enum LegacyBitmapConfig {
293    kNo_LegacyBitmapConfig          = 0,
294    kA8_LegacyBitmapConfig          = 1,
295    kIndex8_LegacyBitmapConfig      = 2,
296    kRGB_565_LegacyBitmapConfig     = 3,
297    kARGB_4444_LegacyBitmapConfig   = 4,
298    kARGB_8888_LegacyBitmapConfig   = 5,
299
300    kLastEnum_LegacyBitmapConfig = kARGB_8888_LegacyBitmapConfig
301};
302
303jint GraphicsJNI::colorTypeToLegacyBitmapConfig(SkColorType colorType) {
304    switch (colorType) {
305        case kN32_SkColorType:
306            return kARGB_8888_LegacyBitmapConfig;
307        case kARGB_4444_SkColorType:
308            return kARGB_4444_LegacyBitmapConfig;
309        case kRGB_565_SkColorType:
310            return kRGB_565_LegacyBitmapConfig;
311        case kIndex_8_SkColorType:
312            return kIndex8_LegacyBitmapConfig;
313        case kAlpha_8_SkColorType:
314            return kA8_LegacyBitmapConfig;
315        case kUnknown_SkColorType:
316        default:
317            break;
318    }
319    return kNo_LegacyBitmapConfig;
320}
321
322SkColorType GraphicsJNI::legacyBitmapConfigToColorType(jint legacyConfig) {
323    const uint8_t gConfig2ColorType[] = {
324        kUnknown_SkColorType,
325        kAlpha_8_SkColorType,
326        kIndex_8_SkColorType,
327        kRGB_565_SkColorType,
328        kARGB_4444_SkColorType,
329        kN32_SkColorType
330    };
331
332    if (legacyConfig < 0 || legacyConfig > kLastEnum_LegacyBitmapConfig) {
333        legacyConfig = kNo_LegacyBitmapConfig;
334    }
335    return static_cast<SkColorType>(gConfig2ColorType[legacyConfig]);
336}
337
338SkBitmap* GraphicsJNI::getNativeBitmap(JNIEnv* env, jobject bitmap) {
339    SkASSERT(env);
340    SkASSERT(bitmap);
341    SkASSERT(env->IsInstanceOf(bitmap, gBitmap_class));
342    jlong bitmapHandle = env->GetLongField(bitmap, gBitmap_nativeInstanceID);
343    SkBitmap* b = reinterpret_cast<SkBitmap*>(bitmapHandle);
344    SkASSERT(b);
345    return b;
346}
347
348SkColorType GraphicsJNI::getNativeBitmapColorType(JNIEnv* env, jobject jconfig) {
349    SkASSERT(env);
350    if (NULL == jconfig) {
351        return kUnknown_SkColorType;
352    }
353    SkASSERT(env->IsInstanceOf(jconfig, gBitmapConfig_class));
354    int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID);
355    return legacyBitmapConfigToColorType(c);
356}
357
358SkCanvas* GraphicsJNI::getNativeCanvas(JNIEnv* env, jobject canvas) {
359    SkASSERT(env);
360    SkASSERT(canvas);
361    SkASSERT(env->IsInstanceOf(canvas, gCanvas_class));
362    jlong canvasHandle = env->GetLongField(canvas, gCanvas_nativeInstanceID);
363    if (!canvasHandle) {
364        return NULL;
365    }
366    SkCanvas* c = reinterpret_cast<android::Canvas*>(canvasHandle)->getSkCanvas();
367    SkASSERT(c);
368    return c;
369}
370
371SkRegion* GraphicsJNI::getNativeRegion(JNIEnv* env, jobject region)
372{
373    SkASSERT(env);
374    SkASSERT(region);
375    SkASSERT(env->IsInstanceOf(region, gRegion_class));
376    jlong regionHandle = env->GetLongField(region, gRegion_nativeInstanceID);
377    SkRegion* r = reinterpret_cast<SkRegion*>(regionHandle);
378    SkASSERT(r);
379    return r;
380}
381
382///////////////////////////////////////////////////////////////////////////////////////////
383
384// Assert that bitmap's SkAlphaType is consistent with isPremultiplied.
385static void assert_premultiplied(const SkBitmap& bitmap, bool isPremultiplied) {
386    // kOpaque_SkAlphaType and kIgnore_SkAlphaType mean that isPremultiplied is
387    // irrelevant. This just tests to ensure that the SkAlphaType is not
388    // opposite of isPremultiplied.
389    if (isPremultiplied) {
390        SkASSERT(bitmap.alphaType() != kUnpremul_SkAlphaType);
391    } else {
392        SkASSERT(bitmap.alphaType() != kPremul_SkAlphaType);
393    }
394}
395
396jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, jbyteArray buffer,
397        int bitmapCreateFlags, jbyteArray ninePatchChunk, jobject ninePatchInsets, int density)
398{
399    SkASSERT(bitmap);
400    SkASSERT(bitmap->pixelRef());
401    SkASSERT(!env->ExceptionCheck());
402    bool isMutable = bitmapCreateFlags & kBitmapCreateFlag_Mutable;
403    bool isPremultiplied = bitmapCreateFlags & kBitmapCreateFlag_Premultiplied;
404
405    // The caller needs to have already set the alpha type properly, so the
406    // native SkBitmap stays in sync with the Java Bitmap.
407    assert_premultiplied(*bitmap, isPremultiplied);
408
409    jobject obj = env->NewObject(gBitmap_class, gBitmap_constructorMethodID,
410            reinterpret_cast<jlong>(bitmap), buffer,
411            bitmap->width(), bitmap->height(), density, isMutable, isPremultiplied,
412            ninePatchChunk, ninePatchInsets);
413    hasException(env); // For the side effect of logging.
414    return obj;
415}
416
417void GraphicsJNI::reinitBitmap(JNIEnv* env, jobject javaBitmap, SkBitmap* bitmap,
418        bool isPremultiplied)
419{
420    // The caller needs to have already set the alpha type properly, so the
421    // native SkBitmap stays in sync with the Java Bitmap.
422    assert_premultiplied(*bitmap, isPremultiplied);
423
424    env->CallVoidMethod(javaBitmap, gBitmap_reinitMethodID,
425            bitmap->width(), bitmap->height(), isPremultiplied);
426}
427
428int GraphicsJNI::getBitmapAllocationByteCount(JNIEnv* env, jobject javaBitmap)
429{
430    return env->CallIntMethod(javaBitmap, gBitmap_getAllocationByteCountMethodID);
431}
432
433jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap)
434{
435    SkASSERT(bitmap != NULL);
436
437    jobject obj = env->NewObject(gBitmapRegionDecoder_class,
438            gBitmapRegionDecoder_constructorMethodID,
439            reinterpret_cast<jlong>(bitmap));
440    hasException(env); // For the side effect of logging.
441    return obj;
442}
443
444jobject GraphicsJNI::createRegion(JNIEnv* env, SkRegion* region)
445{
446    SkASSERT(region != NULL);
447    jobject obj = env->NewObject(gRegion_class, gRegion_constructorMethodID,
448                                 reinterpret_cast<jlong>(region), 0);
449    hasException(env); // For the side effect of logging.
450    return obj;
451}
452
453static JNIEnv* vm2env(JavaVM* vm)
454{
455    JNIEnv* env = NULL;
456    if (vm->GetEnv((void**)&env, JNI_VERSION_1_4) != JNI_OK || NULL == env)
457    {
458        SkDebugf("------- [%p] vm->GetEnv() failed\n", vm);
459        sk_throw();
460    }
461    return env;
462}
463
464///////////////////////////////////////////////////////////////////////////////
465
466AndroidPixelRef::AndroidPixelRef(JNIEnv* env, const SkImageInfo& info, void* storage,
467        size_t rowBytes, jbyteArray storageObj, SkColorTable* ctable) :
468        SkMallocPixelRef(info, storage, rowBytes, ctable, (storageObj == NULL)),
469        fWrappedPixelRef(NULL) {
470    SkASSERT(storage);
471    SkASSERT(storageObj);
472    SkASSERT(env);
473
474    if (env->GetJavaVM(&fVM) != JNI_OK) {
475        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
476        sk_throw();
477    }
478
479    fStorageObj = (jbyteArray) env->NewGlobalRef(storageObj);
480}
481
482AndroidPixelRef::AndroidPixelRef(AndroidPixelRef& wrappedPixelRef, const SkImageInfo& info,
483        size_t rowBytes, SkColorTable* ctable) :
484        SkMallocPixelRef(info, wrappedPixelRef.getAddr(), rowBytes, ctable, false),
485        fWrappedPixelRef(wrappedPixelRef.fWrappedPixelRef ?
486                wrappedPixelRef.fWrappedPixelRef : &wrappedPixelRef)
487{
488    SkASSERT(fWrappedPixelRef);
489    SkSafeRef(fWrappedPixelRef);
490
491    // don't need to initialize this, as all the relevant logic delegates to the wrapped ref
492    fStorageObj = NULL;
493}
494
495AndroidPixelRef::~AndroidPixelRef() {
496    if (fWrappedPixelRef) {
497        SkSafeUnref(fWrappedPixelRef);
498    } else {
499        SkASSERT(fStorageObj);
500        JNIEnv* env = vm2env(fVM);
501        env->DeleteGlobalRef(fStorageObj);
502    }
503}
504
505///////////////////////////////////////////////////////////////////////////////
506
507jbyteArray GraphicsJNI::allocateJavaPixelRef(JNIEnv* env, SkBitmap* bitmap,
508                                             SkColorTable* ctable) {
509    const SkImageInfo& info = bitmap->info();
510    if (info.fColorType == kUnknown_SkColorType) {
511        doThrowIAE(env, "unknown bitmap configuration");
512        return NULL;
513    }
514
515    const size_t size = bitmap->getSize();
516    jbyteArray arrayObj = (jbyteArray) env->CallObjectMethod(gVMRuntime,
517                                                             gVMRuntime_newNonMovableArray,
518                                                             gByte_class, size);
519    if (env->ExceptionCheck() != 0) {
520        return NULL;
521    }
522    SkASSERT(arrayObj);
523    jbyte* addr = (jbyte*) env->CallLongMethod(gVMRuntime, gVMRuntime_addressOf, arrayObj);
524    if (env->ExceptionCheck() != 0) {
525        return NULL;
526    }
527    SkASSERT(addr);
528    SkPixelRef* pr = new AndroidPixelRef(env, info, (void*) addr,
529            bitmap->rowBytes(), arrayObj, ctable);
530    bitmap->setPixelRef(pr)->unref();
531    // since we're already allocated, we lockPixels right away
532    // HeapAllocator behaves this way too
533    bitmap->lockPixels();
534
535    return arrayObj;
536}
537
538///////////////////////////////////////////////////////////////////////////////
539
540JavaPixelAllocator::JavaPixelAllocator(JNIEnv* env)
541    : fStorageObj(NULL),
542      fAllocCount(0) {
543    if (env->GetJavaVM(&fVM) != JNI_OK) {
544        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
545        sk_throw();
546    }
547}
548
549bool JavaPixelAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
550    JNIEnv* env = vm2env(fVM);
551
552    fStorageObj = GraphicsJNI::allocateJavaPixelRef(env, bitmap, ctable);
553    fAllocCount += 1;
554    return fStorageObj != NULL;
555}
556
557////////////////////////////////////////////////////////////////////////////////
558
559static jclass make_globalref(JNIEnv* env, const char classname[])
560{
561    jclass c = env->FindClass(classname);
562    SkASSERT(c);
563    return (jclass) env->NewGlobalRef(c);
564}
565
566static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz,
567                                const char fieldname[], const char type[])
568{
569    jfieldID id = env->GetFieldID(clazz, fieldname, type);
570    SkASSERT(id);
571    return id;
572}
573
574int register_android_graphics_Graphics(JNIEnv* env)
575{
576    jmethodID m;
577    jclass c;
578
579    gRect_class = make_globalref(env, "android/graphics/Rect");
580    gRect_leftFieldID = getFieldIDCheck(env, gRect_class, "left", "I");
581    gRect_topFieldID = getFieldIDCheck(env, gRect_class, "top", "I");
582    gRect_rightFieldID = getFieldIDCheck(env, gRect_class, "right", "I");
583    gRect_bottomFieldID = getFieldIDCheck(env, gRect_class, "bottom", "I");
584
585    gRectF_class = make_globalref(env, "android/graphics/RectF");
586    gRectF_leftFieldID = getFieldIDCheck(env, gRectF_class, "left", "F");
587    gRectF_topFieldID = getFieldIDCheck(env, gRectF_class, "top", "F");
588    gRectF_rightFieldID = getFieldIDCheck(env, gRectF_class, "right", "F");
589    gRectF_bottomFieldID = getFieldIDCheck(env, gRectF_class, "bottom", "F");
590
591    gPoint_class = make_globalref(env, "android/graphics/Point");
592    gPoint_xFieldID = getFieldIDCheck(env, gPoint_class, "x", "I");
593    gPoint_yFieldID = getFieldIDCheck(env, gPoint_class, "y", "I");
594
595    gPointF_class = make_globalref(env, "android/graphics/PointF");
596    gPointF_xFieldID = getFieldIDCheck(env, gPointF_class, "x", "F");
597    gPointF_yFieldID = getFieldIDCheck(env, gPointF_class, "y", "F");
598
599    gBitmap_class = make_globalref(env, "android/graphics/Bitmap");
600    gBitmap_nativeInstanceID = getFieldIDCheck(env, gBitmap_class, "mNativeBitmap", "J");
601    gBitmap_constructorMethodID = env->GetMethodID(gBitmap_class, "<init>", "(J[BIIIZZ[BLandroid/graphics/NinePatch$InsetStruct;)V");
602    gBitmap_reinitMethodID = env->GetMethodID(gBitmap_class, "reinit", "(IIZ)V");
603    gBitmap_getAllocationByteCountMethodID = env->GetMethodID(gBitmap_class, "getAllocationByteCount", "()I");
604    gBitmapRegionDecoder_class = make_globalref(env, "android/graphics/BitmapRegionDecoder");
605    gBitmapRegionDecoder_constructorMethodID = env->GetMethodID(gBitmapRegionDecoder_class, "<init>", "(J)V");
606
607    gBitmapConfig_class = make_globalref(env, "android/graphics/Bitmap$Config");
608    gBitmapConfig_nativeInstanceID = getFieldIDCheck(env, gBitmapConfig_class,
609                                                     "nativeInt", "I");
610
611    gCanvas_class = make_globalref(env, "android/graphics/Canvas");
612    gCanvas_nativeInstanceID = getFieldIDCheck(env, gCanvas_class, "mNativeCanvasWrapper", "J");
613
614    gPicture_class = make_globalref(env, "android/graphics/Picture");
615    gPicture_nativeInstanceID = getFieldIDCheck(env, gPicture_class, "mNativePicture", "J");
616
617    gRegion_class = make_globalref(env, "android/graphics/Region");
618    gRegion_nativeInstanceID = getFieldIDCheck(env, gRegion_class, "mNativeRegion", "J");
619    gRegion_constructorMethodID = env->GetMethodID(gRegion_class, "<init>",
620        "(JI)V");
621
622    c = env->FindClass("java/lang/Byte");
623    gByte_class = (jclass) env->NewGlobalRef(
624        env->GetStaticObjectField(c, env->GetStaticFieldID(c, "TYPE", "Ljava/lang/Class;")));
625
626    gVMRuntime_class = make_globalref(env, "dalvik/system/VMRuntime");
627    m = env->GetStaticMethodID(gVMRuntime_class, "getRuntime", "()Ldalvik/system/VMRuntime;");
628    gVMRuntime = env->NewGlobalRef(env->CallStaticObjectMethod(gVMRuntime_class, m));
629    gVMRuntime_newNonMovableArray = env->GetMethodID(gVMRuntime_class, "newNonMovableArray",
630                                                     "(Ljava/lang/Class;I)Ljava/lang/Object;");
631    gVMRuntime_addressOf = env->GetMethodID(gVMRuntime_class, "addressOf", "(Ljava/lang/Object;)J");
632
633    return 0;
634}
635