Graphics.cpp revision dbccd44a638ae8705a5b14bff8b2dd74abc26045 
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;
155static jmethodID gBitmap_reinitMethodID;
156static jmethodID gBitmap_getAllocationByteCountMethodID;
157
158static jclass   gBitmapConfig_class;
159static jfieldID gBitmapConfig_nativeInstanceID;
160
161static jclass   gBitmapRegionDecoder_class;
162static jmethodID gBitmapRegionDecoder_constructorMethodID;
163
164static jclass   gCanvas_class;
165static jfieldID gCanvas_nativeInstanceID;
166
167static jclass   gPaint_class;
168static jfieldID gPaint_nativeInstanceID;
169
170static jclass   gPicture_class;
171static jfieldID gPicture_nativeInstanceID;
172
173static jclass   gRegion_class;
174static jfieldID gRegion_nativeInstanceID;
175static jmethodID gRegion_constructorMethodID;
176
177static jclass    gByte_class;
178static jobject   gVMRuntime;
179static jclass    gVMRuntime_class;
180static jmethodID gVMRuntime_newNonMovableArray;
181static jmethodID gVMRuntime_addressOf;
182
183///////////////////////////////////////////////////////////////////////////////
184
185void GraphicsJNI::get_jrect(JNIEnv* env, jobject obj, int* L, int* T, int* R, int* B)
186{
187    SkASSERT(env->IsInstanceOf(obj, gRect_class));
188
189    *L = env->GetIntField(obj, gRect_leftFieldID);
190    *T = env->GetIntField(obj, gRect_topFieldID);
191    *R = env->GetIntField(obj, gRect_rightFieldID);
192    *B = env->GetIntField(obj, gRect_bottomFieldID);
193}
194
195void GraphicsJNI::set_jrect(JNIEnv* env, jobject obj, int L, int T, int R, int B)
196{
197    SkASSERT(env->IsInstanceOf(obj, gRect_class));
198
199    env->SetIntField(obj, gRect_leftFieldID, L);
200    env->SetIntField(obj, gRect_topFieldID, T);
201    env->SetIntField(obj, gRect_rightFieldID, R);
202    env->SetIntField(obj, gRect_bottomFieldID, B);
203}
204
205SkIRect* GraphicsJNI::jrect_to_irect(JNIEnv* env, jobject obj, SkIRect* ir)
206{
207    SkASSERT(env->IsInstanceOf(obj, gRect_class));
208
209    ir->set(env->GetIntField(obj, gRect_leftFieldID),
210            env->GetIntField(obj, gRect_topFieldID),
211            env->GetIntField(obj, gRect_rightFieldID),
212            env->GetIntField(obj, gRect_bottomFieldID));
213    return ir;
214}
215
216void GraphicsJNI::irect_to_jrect(const SkIRect& ir, JNIEnv* env, jobject obj)
217{
218    SkASSERT(env->IsInstanceOf(obj, gRect_class));
219
220    env->SetIntField(obj, gRect_leftFieldID, ir.fLeft);
221    env->SetIntField(obj, gRect_topFieldID, ir.fTop);
222    env->SetIntField(obj, gRect_rightFieldID, ir.fRight);
223    env->SetIntField(obj, gRect_bottomFieldID, ir.fBottom);
224}
225
226SkRect* GraphicsJNI::jrectf_to_rect(JNIEnv* env, jobject obj, SkRect* r)
227{
228    SkASSERT(env->IsInstanceOf(obj, gRectF_class));
229
230    r->set(SkFloatToScalar(env->GetFloatField(obj, gRectF_leftFieldID)),
231           SkFloatToScalar(env->GetFloatField(obj, gRectF_topFieldID)),
232           SkFloatToScalar(env->GetFloatField(obj, gRectF_rightFieldID)),
233           SkFloatToScalar(env->GetFloatField(obj, gRectF_bottomFieldID)));
234    return r;
235}
236
237SkRect* GraphicsJNI::jrect_to_rect(JNIEnv* env, jobject obj, SkRect* r)
238{
239    SkASSERT(env->IsInstanceOf(obj, gRect_class));
240
241    r->set(SkIntToScalar(env->GetIntField(obj, gRect_leftFieldID)),
242           SkIntToScalar(env->GetIntField(obj, gRect_topFieldID)),
243           SkIntToScalar(env->GetIntField(obj, gRect_rightFieldID)),
244           SkIntToScalar(env->GetIntField(obj, gRect_bottomFieldID)));
245    return r;
246}
247
248void GraphicsJNI::rect_to_jrectf(const SkRect& r, JNIEnv* env, jobject obj)
249{
250    SkASSERT(env->IsInstanceOf(obj, gRectF_class));
251
252    env->SetFloatField(obj, gRectF_leftFieldID, SkScalarToFloat(r.fLeft));
253    env->SetFloatField(obj, gRectF_topFieldID, SkScalarToFloat(r.fTop));
254    env->SetFloatField(obj, gRectF_rightFieldID, SkScalarToFloat(r.fRight));
255    env->SetFloatField(obj, gRectF_bottomFieldID, SkScalarToFloat(r.fBottom));
256}
257
258SkIPoint* GraphicsJNI::jpoint_to_ipoint(JNIEnv* env, jobject obj, SkIPoint* point)
259{
260    SkASSERT(env->IsInstanceOf(obj, gPoint_class));
261
262    point->set(env->GetIntField(obj, gPoint_xFieldID),
263               env->GetIntField(obj, gPoint_yFieldID));
264    return point;
265}
266
267void GraphicsJNI::ipoint_to_jpoint(const SkIPoint& ir, JNIEnv* env, jobject obj)
268{
269    SkASSERT(env->IsInstanceOf(obj, gPoint_class));
270
271    env->SetIntField(obj, gPoint_xFieldID, ir.fX);
272    env->SetIntField(obj, gPoint_yFieldID, ir.fY);
273}
274
275SkPoint* GraphicsJNI::jpointf_to_point(JNIEnv* env, jobject obj, SkPoint* point)
276{
277    SkASSERT(env->IsInstanceOf(obj, gPointF_class));
278
279    point->set(SkFloatToScalar(env->GetIntField(obj, gPointF_xFieldID)),
280               SkFloatToScalar(env->GetIntField(obj, gPointF_yFieldID)));
281    return point;
282}
283
284void GraphicsJNI::point_to_jpointf(const SkPoint& r, JNIEnv* env, jobject obj)
285{
286    SkASSERT(env->IsInstanceOf(obj, gPointF_class));
287
288    env->SetFloatField(obj, gPointF_xFieldID, SkScalarToFloat(r.fX));
289    env->SetFloatField(obj, gPointF_yFieldID, SkScalarToFloat(r.fY));
290}
291
292SkBitmap* GraphicsJNI::getNativeBitmap(JNIEnv* env, jobject bitmap) {
293    SkASSERT(env);
294    SkASSERT(bitmap);
295    SkASSERT(env->IsInstanceOf(bitmap, gBitmap_class));
296    SkBitmap* b = (SkBitmap*)env->GetIntField(bitmap, gBitmap_nativeInstanceID);
297    SkASSERT(b);
298    return b;
299}
300
301SkBitmap::Config GraphicsJNI::getNativeBitmapConfig(JNIEnv* env,
302                                                    jobject jconfig) {
303    SkASSERT(env);
304    if (NULL == jconfig) {
305        return SkBitmap::kNo_Config;
306    }
307    SkASSERT(env->IsInstanceOf(jconfig, gBitmapConfig_class));
308    int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID);
309    if (c < 0 || c >= SkBitmap::kConfigCount) {
310        c = SkBitmap::kNo_Config;
311    }
312    return static_cast<SkBitmap::Config>(c);
313}
314
315SkCanvas* GraphicsJNI::getNativeCanvas(JNIEnv* env, jobject canvas) {
316    SkASSERT(env);
317    SkASSERT(canvas);
318    SkASSERT(env->IsInstanceOf(canvas, gCanvas_class));
319    SkCanvas* c = (SkCanvas*)env->GetIntField(canvas, gCanvas_nativeInstanceID);
320    SkASSERT(c);
321    return c;
322}
323
324SkPaint* GraphicsJNI::getNativePaint(JNIEnv* env, jobject paint) {
325    SkASSERT(env);
326    SkASSERT(paint);
327    SkASSERT(env->IsInstanceOf(paint, gPaint_class));
328    SkPaint* p = (SkPaint*)env->GetIntField(paint, gPaint_nativeInstanceID);
329    SkASSERT(p);
330    return p;
331}
332
333SkPicture* GraphicsJNI::getNativePicture(JNIEnv* env, jobject picture)
334{
335    SkASSERT(env);
336    SkASSERT(picture);
337    SkASSERT(env->IsInstanceOf(picture, gPicture_class));
338    SkPicture* p = (SkPicture*)env->GetIntField(picture, gPicture_nativeInstanceID);
339    SkASSERT(p);
340    return p;
341}
342
343SkRegion* GraphicsJNI::getNativeRegion(JNIEnv* env, jobject region)
344{
345    SkASSERT(env);
346    SkASSERT(region);
347    SkASSERT(env->IsInstanceOf(region, gRegion_class));
348    SkRegion* r = (SkRegion*)env->GetIntField(region, gRegion_nativeInstanceID);
349    SkASSERT(r);
350    return r;
351}
352
353///////////////////////////////////////////////////////////////////////////////////////////
354
355jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, jbyteArray buffer,
356        int bitmapCreateFlags, jbyteArray ninepatch, jintArray layoutbounds, int density)
357{
358    SkASSERT(bitmap);
359    SkASSERT(bitmap->pixelRef());
360    bool isMutable = bitmapCreateFlags & kBitmapCreateFlag_Mutable;
361    bool isPremultiplied = bitmapCreateFlags & kBitmapCreateFlag_Premultiplied;
362
363    jobject obj = env->NewObject(gBitmap_class, gBitmap_constructorMethodID,
364            static_cast<jint>(reinterpret_cast<uintptr_t>(bitmap)), buffer,
365            bitmap->width(), bitmap->height(), density, isMutable, isPremultiplied,
366            ninepatch, layoutbounds);
367    hasException(env); // For the side effect of logging.
368    return obj;
369}
370
371jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, int bitmapCreateFlags,
372        jbyteArray ninepatch, int density)
373{
374    return createBitmap(env, bitmap, NULL, bitmapCreateFlags, ninepatch, NULL, density);
375}
376
377void GraphicsJNI::reinitBitmap(JNIEnv* env, jobject javaBitmap, SkBitmap* bitmap,
378        bool isPremultiplied)
379{
380    env->CallVoidMethod(javaBitmap, gBitmap_reinitMethodID,
381            bitmap->width(), bitmap->height(), isPremultiplied);
382}
383
384int GraphicsJNI::getBitmapAllocationByteCount(JNIEnv* env, jobject javaBitmap)
385{
386    return env->CallIntMethod(javaBitmap, gBitmap_getAllocationByteCountMethodID);
387}
388
389jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap)
390{
391    SkASSERT(bitmap != NULL);
392
393    jobject obj = env->NewObject(gBitmapRegionDecoder_class,
394            gBitmapRegionDecoder_constructorMethodID,
395            static_cast<jint>(reinterpret_cast<uintptr_t>(bitmap)));
396    hasException(env); // For the side effect of logging.
397    return obj;
398}
399
400jobject GraphicsJNI::createRegion(JNIEnv* env, SkRegion* region)
401{
402    SkASSERT(region != NULL);
403    jobject obj = env->NewObject(gRegion_class, gRegion_constructorMethodID,
404            static_cast<jint>(reinterpret_cast<uintptr_t>(region)), 0);
405    hasException(env); // For the side effect of logging.
406    return obj;
407}
408
409static JNIEnv* vm2env(JavaVM* vm)
410{
411    JNIEnv* env = NULL;
412    if (vm->GetEnv((void**)&env, JNI_VERSION_1_4) != JNI_OK || NULL == env)
413    {
414        SkDebugf("------- [%p] vm->GetEnv() failed\n", vm);
415        sk_throw();
416    }
417    return env;
418}
419
420///////////////////////////////////////////////////////////////////////////////
421
422AndroidPixelRef::AndroidPixelRef(JNIEnv* env, void* storage, size_t size, jbyteArray storageObj,
423        SkColorTable* ctable) : SkMallocPixelRef(storage, size, ctable, (storageObj == NULL)),
424        fWrappedPixelRef(NULL) {
425    SkASSERT(storage);
426    SkASSERT(env);
427
428    if (env->GetJavaVM(&fVM) != JNI_OK) {
429        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
430        sk_throw();
431    }
432    fStorageObj = storageObj;
433    fHasGlobalRef = false;
434    fGlobalRefCnt = 0;
435
436    // If storageObj is NULL, the memory was NOT allocated on the Java heap
437    fOnJavaHeap = (storageObj != NULL);
438
439}
440
441AndroidPixelRef::AndroidPixelRef(AndroidPixelRef& wrappedPixelRef, SkColorTable* ctable) :
442        SkMallocPixelRef(wrappedPixelRef.getAddr(), wrappedPixelRef.getSize(), ctable, false),
443        fWrappedPixelRef(wrappedPixelRef.fWrappedPixelRef ?
444            wrappedPixelRef.fWrappedPixelRef : &wrappedPixelRef)
445{
446    SkASSERT(fWrappedPixelRef);
447    SkSafeRef(fWrappedPixelRef);
448
449    // don't need to initialize these, as all the relevant logic delegates to the wrapped ref
450    fStorageObj = NULL;
451    fHasGlobalRef = false;
452    fGlobalRefCnt = 0;
453    fOnJavaHeap = false;
454}
455
456AndroidPixelRef::~AndroidPixelRef() {
457    if (fWrappedPixelRef) {
458        SkSafeUnref(fWrappedPixelRef);
459    } else if (fOnJavaHeap) {
460        JNIEnv* env = vm2env(fVM);
461
462        if (fStorageObj && fHasGlobalRef) {
463            env->DeleteGlobalRef(fStorageObj);
464        }
465        fStorageObj = NULL;
466    }
467}
468jbyteArray AndroidPixelRef::getStorageObj() {
469    if (fWrappedPixelRef) {
470        return fWrappedPixelRef->fStorageObj;
471    }
472    return fStorageObj;
473}
474
475void AndroidPixelRef::setLocalJNIRef(jbyteArray arr) {
476    if (fWrappedPixelRef) {
477        // delegate java obj management to the wrapped ref
478        fWrappedPixelRef->setLocalJNIRef(arr);
479    } else if (!fHasGlobalRef) {
480        fStorageObj = arr;
481    }
482}
483
484void AndroidPixelRef::globalRef(void* localref) {
485    if (fWrappedPixelRef) {
486        // delegate java obj management to the wrapped ref
487        fWrappedPixelRef->globalRef(localref);
488
489        // Note: we only ref and unref the wrapped AndroidPixelRef so that
490        // bitmap->pixelRef()->globalRef() and globalUnref() can be used in a pair, even if
491        // the bitmap has its underlying AndroidPixelRef swapped out/wrapped
492        return;
493    }
494    if (fOnJavaHeap && sk_atomic_inc(&fGlobalRefCnt) == 0) {
495        JNIEnv *env = vm2env(fVM);
496
497        // If JNI ref was passed, it is always used
498        if (localref) fStorageObj = (jbyteArray) localref;
499
500        if (fStorageObj == NULL) {
501            SkDebugf("No valid local ref to create a JNI global ref\n");
502            sk_throw();
503        }
504        if (fHasGlobalRef) {
505            // This should never happen
506            SkDebugf("Already holding a JNI global ref");
507            sk_throw();
508        }
509
510        fStorageObj = (jbyteArray) env->NewGlobalRef(fStorageObj);
511        // TODO: Check for failure here
512        fHasGlobalRef = true;
513    }
514    ref();
515}
516
517void AndroidPixelRef::globalUnref() {
518    if (fWrappedPixelRef) {
519        // delegate java obj management to the wrapped ref
520        fWrappedPixelRef->globalUnref();
521        return;
522    }
523    if (fOnJavaHeap && sk_atomic_dec(&fGlobalRefCnt) == 1) {
524        JNIEnv *env = vm2env(fVM);
525        if (!fHasGlobalRef) {
526            SkDebugf("We don't have a global ref!");
527            sk_throw();
528        }
529        env->DeleteGlobalRef(fStorageObj);
530        fStorageObj = NULL;
531        fHasGlobalRef = false;
532    }
533    unref();
534}
535
536///////////////////////////////////////////////////////////////////////////////
537
538jbyteArray GraphicsJNI::allocateJavaPixelRef(JNIEnv* env, SkBitmap* bitmap,
539                                             SkColorTable* ctable) {
540    Sk64 size64 = bitmap->getSize64();
541    if (size64.isNeg() || !size64.is32()) {
542        jniThrowException(env, "java/lang/IllegalArgumentException",
543                          "bitmap size exceeds 32bits");
544        return NULL;
545    }
546    size_t size = size64.get32();
547    jbyteArray arrayObj = (jbyteArray) env->CallObjectMethod(gVMRuntime,
548                                                             gVMRuntime_newNonMovableArray,
549                                                             gByte_class, size);
550    if (arrayObj) {
551        jbyte* addr = (jbyte*) env->CallLongMethod(gVMRuntime, gVMRuntime_addressOf, arrayObj);
552        if (addr) {
553            SkPixelRef* pr = new AndroidPixelRef(env, (void*) addr, size, arrayObj, ctable);
554            bitmap->setPixelRef(pr)->unref();
555            // since we're already allocated, we lockPixels right away
556            // HeapAllocator behaves this way too
557            bitmap->lockPixels();
558        }
559    }
560
561    return arrayObj;
562}
563
564///////////////////////////////////////////////////////////////////////////////
565
566JavaPixelAllocator::JavaPixelAllocator(JNIEnv* env)
567    : fStorageObj(NULL),
568      fAllocCount(0) {
569    if (env->GetJavaVM(&fVM) != JNI_OK) {
570        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
571        sk_throw();
572    }
573}
574
575bool JavaPixelAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
576    JNIEnv* env = vm2env(fVM);
577
578    fStorageObj = GraphicsJNI::allocateJavaPixelRef(env, bitmap, ctable);
579    fAllocCount += 1;
580    return fStorageObj != NULL;
581}
582
583////////////////////////////////////////////////////////////////////////////////
584
585JavaHeapBitmapRef::JavaHeapBitmapRef(JNIEnv* env, SkBitmap* nativeBitmap, jbyteArray buffer) {
586    fEnv = env;
587    fNativeBitmap = nativeBitmap;
588    fBuffer = buffer;
589
590    // If the buffer is NULL, the backing memory wasn't allocated on the Java heap
591    if (fBuffer) {
592        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(fBuffer);
593    }
594}
595
596JavaHeapBitmapRef::~JavaHeapBitmapRef() {
597    if (fBuffer) {
598        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(NULL);
599    }
600}
601
602////////////////////////////////////////////////////////////////////////////////
603
604static jclass make_globalref(JNIEnv* env, const char classname[])
605{
606    jclass c = env->FindClass(classname);
607    SkASSERT(c);
608    return (jclass) env->NewGlobalRef(c);
609}
610
611static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz,
612                                const char fieldname[], const char type[])
613{
614    jfieldID id = env->GetFieldID(clazz, fieldname, type);
615    SkASSERT(id);
616    return id;
617}
618
619int register_android_graphics_Graphics(JNIEnv* env)
620{
621    jmethodID m;
622    jclass c;
623
624    gRect_class = make_globalref(env, "android/graphics/Rect");
625    gRect_leftFieldID = getFieldIDCheck(env, gRect_class, "left", "I");
626    gRect_topFieldID = getFieldIDCheck(env, gRect_class, "top", "I");
627    gRect_rightFieldID = getFieldIDCheck(env, gRect_class, "right", "I");
628    gRect_bottomFieldID = getFieldIDCheck(env, gRect_class, "bottom", "I");
629
630    gRectF_class = make_globalref(env, "android/graphics/RectF");
631    gRectF_leftFieldID = getFieldIDCheck(env, gRectF_class, "left", "F");
632    gRectF_topFieldID = getFieldIDCheck(env, gRectF_class, "top", "F");
633    gRectF_rightFieldID = getFieldIDCheck(env, gRectF_class, "right", "F");
634    gRectF_bottomFieldID = getFieldIDCheck(env, gRectF_class, "bottom", "F");
635
636    gPoint_class = make_globalref(env, "android/graphics/Point");
637    gPoint_xFieldID = getFieldIDCheck(env, gPoint_class, "x", "I");
638    gPoint_yFieldID = getFieldIDCheck(env, gPoint_class, "y", "I");
639
640    gPointF_class = make_globalref(env, "android/graphics/PointF");
641    gPointF_xFieldID = getFieldIDCheck(env, gPointF_class, "x", "F");
642    gPointF_yFieldID = getFieldIDCheck(env, gPointF_class, "y", "F");
643
644    gBitmap_class = make_globalref(env, "android/graphics/Bitmap");
645    gBitmap_nativeInstanceID = getFieldIDCheck(env, gBitmap_class, "mNativeBitmap", "I");
646    gBitmap_constructorMethodID = env->GetMethodID(gBitmap_class, "<init>", "(I[BIIIZZ[B[I)V");
647    gBitmap_reinitMethodID = env->GetMethodID(gBitmap_class, "reinit", "(IIZ)V");
648    gBitmap_getAllocationByteCountMethodID = env->GetMethodID(gBitmap_class, "getAllocationByteCount", "()I");
649    gBitmapRegionDecoder_class = make_globalref(env, "android/graphics/BitmapRegionDecoder");
650    gBitmapRegionDecoder_constructorMethodID = env->GetMethodID(gBitmapRegionDecoder_class, "<init>", "(I)V");
651
652    gBitmapConfig_class = make_globalref(env, "android/graphics/Bitmap$Config");
653    gBitmapConfig_nativeInstanceID = getFieldIDCheck(env, gBitmapConfig_class,
654                                                     "nativeInt", "I");
655
656    gCanvas_class = make_globalref(env, "android/graphics/Canvas");
657    gCanvas_nativeInstanceID = getFieldIDCheck(env, gCanvas_class, "mNativeCanvas", "I");
658
659    gPaint_class = make_globalref(env, "android/graphics/Paint");
660    gPaint_nativeInstanceID = getFieldIDCheck(env, gPaint_class, "mNativePaint", "I");
661
662    gPicture_class = make_globalref(env, "android/graphics/Picture");
663    gPicture_nativeInstanceID = getFieldIDCheck(env, gPicture_class, "mNativePicture", "I");
664
665    gRegion_class = make_globalref(env, "android/graphics/Region");
666    gRegion_nativeInstanceID = getFieldIDCheck(env, gRegion_class, "mNativeRegion", "I");
667    gRegion_constructorMethodID = env->GetMethodID(gRegion_class, "<init>",
668        "(II)V");
669
670    c = env->FindClass("java/lang/Byte");
671    gByte_class = (jclass) env->NewGlobalRef(
672        env->GetStaticObjectField(c, env->GetStaticFieldID(c, "TYPE", "Ljava/lang/Class;")));
673
674    gVMRuntime_class = make_globalref(env, "dalvik/system/VMRuntime");
675    m = env->GetStaticMethodID(gVMRuntime_class, "getRuntime", "()Ldalvik/system/VMRuntime;");
676    gVMRuntime = env->NewGlobalRef(env->CallStaticObjectMethod(gVMRuntime_class, m));
677    gVMRuntime_newNonMovableArray = env->GetMethodID(gVMRuntime_class, "newNonMovableArray",
678                                                     "(Ljava/lang/Class;I)Ljava/lang/Object;");
679    gVMRuntime_addressOf = env->GetMethodID(gVMRuntime_class, "addressOf", "(Ljava/lang/Object;)J");
680
681    return 0;
682}
683