Graphics.cpp revision 304bbd287c7a18f66f18daaed0d0aae78199bdd9 
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 "SkMath.h"
10#include "SkPicture.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   gPaint_class;
169static jfieldID gPaint_nativeInstanceID;
170static jfieldID gPaint_nativeTypefaceID;
171
172static jclass   gPicture_class;
173static jfieldID gPicture_nativeInstanceID;
174
175static jclass   gRegion_class;
176static jfieldID gRegion_nativeInstanceID;
177static jmethodID gRegion_constructorMethodID;
178
179static jclass    gByte_class;
180static jobject   gVMRuntime;
181static jclass    gVMRuntime_class;
182static jmethodID gVMRuntime_newNonMovableArray;
183static jmethodID gVMRuntime_addressOf;
184
185///////////////////////////////////////////////////////////////////////////////
186
187void GraphicsJNI::get_jrect(JNIEnv* env, jobject obj, int* L, int* T, int* R, int* B)
188{
189    SkASSERT(env->IsInstanceOf(obj, gRect_class));
190
191    *L = env->GetIntField(obj, gRect_leftFieldID);
192    *T = env->GetIntField(obj, gRect_topFieldID);
193    *R = env->GetIntField(obj, gRect_rightFieldID);
194    *B = env->GetIntField(obj, gRect_bottomFieldID);
195}
196
197void GraphicsJNI::set_jrect(JNIEnv* env, jobject obj, int L, int T, int R, int B)
198{
199    SkASSERT(env->IsInstanceOf(obj, gRect_class));
200
201    env->SetIntField(obj, gRect_leftFieldID, L);
202    env->SetIntField(obj, gRect_topFieldID, T);
203    env->SetIntField(obj, gRect_rightFieldID, R);
204    env->SetIntField(obj, gRect_bottomFieldID, B);
205}
206
207SkIRect* GraphicsJNI::jrect_to_irect(JNIEnv* env, jobject obj, SkIRect* ir)
208{
209    SkASSERT(env->IsInstanceOf(obj, gRect_class));
210
211    ir->set(env->GetIntField(obj, gRect_leftFieldID),
212            env->GetIntField(obj, gRect_topFieldID),
213            env->GetIntField(obj, gRect_rightFieldID),
214            env->GetIntField(obj, gRect_bottomFieldID));
215    return ir;
216}
217
218void GraphicsJNI::irect_to_jrect(const SkIRect& ir, JNIEnv* env, jobject obj)
219{
220    SkASSERT(env->IsInstanceOf(obj, gRect_class));
221
222    env->SetIntField(obj, gRect_leftFieldID, ir.fLeft);
223    env->SetIntField(obj, gRect_topFieldID, ir.fTop);
224    env->SetIntField(obj, gRect_rightFieldID, ir.fRight);
225    env->SetIntField(obj, gRect_bottomFieldID, ir.fBottom);
226}
227
228SkRect* GraphicsJNI::jrectf_to_rect(JNIEnv* env, jobject obj, SkRect* r)
229{
230    SkASSERT(env->IsInstanceOf(obj, gRectF_class));
231
232    r->set(env->GetFloatField(obj, gRectF_leftFieldID),
233           env->GetFloatField(obj, gRectF_topFieldID),
234           env->GetFloatField(obj, gRectF_rightFieldID),
235           env->GetFloatField(obj, gRectF_bottomFieldID));
236    return r;
237}
238
239SkRect* GraphicsJNI::jrect_to_rect(JNIEnv* env, jobject obj, SkRect* r)
240{
241    SkASSERT(env->IsInstanceOf(obj, gRect_class));
242
243    r->set(SkIntToScalar(env->GetIntField(obj, gRect_leftFieldID)),
244           SkIntToScalar(env->GetIntField(obj, gRect_topFieldID)),
245           SkIntToScalar(env->GetIntField(obj, gRect_rightFieldID)),
246           SkIntToScalar(env->GetIntField(obj, gRect_bottomFieldID)));
247    return r;
248}
249
250void GraphicsJNI::rect_to_jrectf(const SkRect& r, JNIEnv* env, jobject obj)
251{
252    SkASSERT(env->IsInstanceOf(obj, gRectF_class));
253
254    env->SetFloatField(obj, gRectF_leftFieldID, SkScalarToFloat(r.fLeft));
255    env->SetFloatField(obj, gRectF_topFieldID, SkScalarToFloat(r.fTop));
256    env->SetFloatField(obj, gRectF_rightFieldID, SkScalarToFloat(r.fRight));
257    env->SetFloatField(obj, gRectF_bottomFieldID, SkScalarToFloat(r.fBottom));
258}
259
260SkIPoint* GraphicsJNI::jpoint_to_ipoint(JNIEnv* env, jobject obj, SkIPoint* point)
261{
262    SkASSERT(env->IsInstanceOf(obj, gPoint_class));
263
264    point->set(env->GetIntField(obj, gPoint_xFieldID),
265               env->GetIntField(obj, gPoint_yFieldID));
266    return point;
267}
268
269void GraphicsJNI::ipoint_to_jpoint(const SkIPoint& ir, JNIEnv* env, jobject obj)
270{
271    SkASSERT(env->IsInstanceOf(obj, gPoint_class));
272
273    env->SetIntField(obj, gPoint_xFieldID, ir.fX);
274    env->SetIntField(obj, gPoint_yFieldID, ir.fY);
275}
276
277SkPoint* GraphicsJNI::jpointf_to_point(JNIEnv* env, jobject obj, SkPoint* point)
278{
279    SkASSERT(env->IsInstanceOf(obj, gPointF_class));
280
281    point->set(env->GetIntField(obj, gPointF_xFieldID),
282               env->GetIntField(obj, gPointF_yFieldID));
283    return point;
284}
285
286void GraphicsJNI::point_to_jpointf(const SkPoint& r, JNIEnv* env, jobject obj)
287{
288    SkASSERT(env->IsInstanceOf(obj, gPointF_class));
289
290    env->SetFloatField(obj, gPointF_xFieldID, SkScalarToFloat(r.fX));
291    env->SetFloatField(obj, gPointF_yFieldID, SkScalarToFloat(r.fY));
292}
293
294SkBitmap* GraphicsJNI::getNativeBitmap(JNIEnv* env, jobject bitmap) {
295    SkASSERT(env);
296    SkASSERT(bitmap);
297    SkASSERT(env->IsInstanceOf(bitmap, gBitmap_class));
298    jlong bitmapHandle = env->GetLongField(bitmap, gBitmap_nativeInstanceID);
299    SkBitmap* b = reinterpret_cast<SkBitmap*>(bitmapHandle);
300    SkASSERT(b);
301    return b;
302}
303
304SkBitmap::Config GraphicsJNI::getNativeBitmapConfig(JNIEnv* env,
305                                                    jobject jconfig) {
306    SkASSERT(env);
307    if (NULL == jconfig) {
308        return SkBitmap::kNo_Config;
309    }
310    SkASSERT(env->IsInstanceOf(jconfig, gBitmapConfig_class));
311    int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID);
312    if (c < 0 || c >= SkBitmap::kConfigCount) {
313        c = SkBitmap::kNo_Config;
314    }
315    return static_cast<SkBitmap::Config>(c);
316}
317
318SkCanvas* GraphicsJNI::getNativeCanvas(JNIEnv* env, jobject canvas) {
319    SkASSERT(env);
320    SkASSERT(canvas);
321    SkASSERT(env->IsInstanceOf(canvas, gCanvas_class));
322    jlong canvasHandle = env->GetLongField(canvas, gCanvas_nativeInstanceID);
323    SkCanvas* c = reinterpret_cast<SkCanvas*>(canvasHandle);
324    SkASSERT(c);
325    return c;
326}
327
328SkPaint* GraphicsJNI::getNativePaint(JNIEnv* env, jobject paint) {
329    SkASSERT(env);
330    SkASSERT(paint);
331    SkASSERT(env->IsInstanceOf(paint, gPaint_class));
332    jlong paintHandle = env->GetLongField(paint, gPaint_nativeInstanceID);
333    SkPaint* p = reinterpret_cast<SkPaint*>(paintHandle);
334    SkASSERT(p);
335    return p;
336}
337
338android::TypefaceImpl* GraphicsJNI::getNativeTypeface(JNIEnv* env, jobject paint) {
339    SkASSERT(env);
340    SkASSERT(paint);
341    SkASSERT(env->IsInstanceOf(paint, gPaint_class));
342    jlong typefaceHandle = env->GetLongField(paint, gPaint_nativeTypefaceID);
343    android::TypefaceImpl* p = reinterpret_cast<android::TypefaceImpl*>(typefaceHandle);
344    SkASSERT(p);
345    return p;
346}
347
348SkPicture* GraphicsJNI::getNativePicture(JNIEnv* env, jobject picture)
349{
350    SkASSERT(env);
351    SkASSERT(picture);
352    SkASSERT(env->IsInstanceOf(picture, gPicture_class));
353    jlong pictureHandle = env->GetLongField(picture, gPicture_nativeInstanceID);
354    SkPicture* p = reinterpret_cast<SkPicture*>(pictureHandle);
355    SkASSERT(p);
356    return p;
357}
358
359SkRegion* GraphicsJNI::getNativeRegion(JNIEnv* env, jobject region)
360{
361    SkASSERT(env);
362    SkASSERT(region);
363    SkASSERT(env->IsInstanceOf(region, gRegion_class));
364    jlong regionHandle = env->GetLongField(region, gRegion_nativeInstanceID);
365    SkRegion* r = reinterpret_cast<SkRegion*>(regionHandle);
366    SkASSERT(r);
367    return r;
368}
369
370///////////////////////////////////////////////////////////////////////////////////////////
371
372// Assert that bitmap's SkAlphaType is consistent with isPremultiplied.
373static void assert_premultiplied(const SkBitmap& bitmap, bool isPremultiplied) {
374    // kOpaque_SkAlphaType and kIgnore_SkAlphaType mean that isPremultiplied is
375    // irrelevant. This just tests to ensure that the SkAlphaType is not
376    // opposite of isPremultiplied.
377    if (isPremultiplied) {
378        SkASSERT(bitmap.alphaType() != kUnpremul_SkAlphaType);
379    } else {
380        SkASSERT(bitmap.alphaType() != kPremul_SkAlphaType);
381    }
382}
383
384jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, jbyteArray buffer,
385        int bitmapCreateFlags, jbyteArray ninepatch, jintArray layoutbounds, int density)
386{
387    SkASSERT(bitmap);
388    SkASSERT(bitmap->pixelRef());
389    bool isMutable = bitmapCreateFlags & kBitmapCreateFlag_Mutable;
390    bool isPremultiplied = bitmapCreateFlags & kBitmapCreateFlag_Premultiplied;
391
392    // The caller needs to have already set the alpha type properly, so the
393    // native SkBitmap stays in sync with the Java Bitmap.
394    assert_premultiplied(*bitmap, isPremultiplied);
395
396    jobject obj = env->NewObject(gBitmap_class, gBitmap_constructorMethodID,
397            reinterpret_cast<jlong>(bitmap), buffer,
398            bitmap->width(), bitmap->height(), density, isMutable, isPremultiplied,
399            ninepatch, layoutbounds);
400    hasException(env); // For the side effect of logging.
401    return obj;
402}
403
404jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, int bitmapCreateFlags,
405        jbyteArray ninepatch, int density)
406{
407    return createBitmap(env, bitmap, NULL, bitmapCreateFlags, ninepatch, NULL, density);
408}
409
410void GraphicsJNI::reinitBitmap(JNIEnv* env, jobject javaBitmap, SkBitmap* bitmap,
411        bool isPremultiplied)
412{
413    // The caller needs to have already set the alpha type properly, so the
414    // native SkBitmap stays in sync with the Java Bitmap.
415    assert_premultiplied(*bitmap, isPremultiplied);
416
417    env->CallVoidMethod(javaBitmap, gBitmap_reinitMethodID,
418            bitmap->width(), bitmap->height(), isPremultiplied);
419}
420
421int GraphicsJNI::getBitmapAllocationByteCount(JNIEnv* env, jobject javaBitmap)
422{
423    return env->CallIntMethod(javaBitmap, gBitmap_getAllocationByteCountMethodID);
424}
425
426jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap)
427{
428    SkASSERT(bitmap != NULL);
429
430    jobject obj = env->NewObject(gBitmapRegionDecoder_class,
431            gBitmapRegionDecoder_constructorMethodID,
432            reinterpret_cast<jlong>(bitmap));
433    hasException(env); // For the side effect of logging.
434    return obj;
435}
436
437jobject GraphicsJNI::createRegion(JNIEnv* env, SkRegion* region)
438{
439    SkASSERT(region != NULL);
440    jobject obj = env->NewObject(gRegion_class, gRegion_constructorMethodID,
441                                 reinterpret_cast<jlong>(region), 0);
442    hasException(env); // For the side effect of logging.
443    return obj;
444}
445
446static JNIEnv* vm2env(JavaVM* vm)
447{
448    JNIEnv* env = NULL;
449    if (vm->GetEnv((void**)&env, JNI_VERSION_1_4) != JNI_OK || NULL == env)
450    {
451        SkDebugf("------- [%p] vm->GetEnv() failed\n", vm);
452        sk_throw();
453    }
454    return env;
455}
456
457///////////////////////////////////////////////////////////////////////////////
458
459AndroidPixelRef::AndroidPixelRef(JNIEnv* env, const SkImageInfo& info, void* storage,
460        size_t rowBytes, jbyteArray storageObj, SkColorTable* ctable) :
461        SkMallocPixelRef(info, storage, rowBytes, ctable, (storageObj == NULL)),
462        fWrappedPixelRef(NULL) {
463    SkASSERT(storage);
464    SkASSERT(env);
465
466    if (env->GetJavaVM(&fVM) != JNI_OK) {
467        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
468        sk_throw();
469    }
470    fStorageObj = storageObj;
471    fHasGlobalRef = false;
472    fGlobalRefCnt = 0;
473
474    // If storageObj is NULL, the memory was NOT allocated on the Java heap
475    fOnJavaHeap = (storageObj != NULL);
476
477}
478
479AndroidPixelRef::AndroidPixelRef(AndroidPixelRef& wrappedPixelRef, const SkImageInfo& info,
480        size_t rowBytes, SkColorTable* ctable) :
481        SkMallocPixelRef(info, wrappedPixelRef.getAddr(), rowBytes, ctable, false),
482        fWrappedPixelRef(wrappedPixelRef.fWrappedPixelRef ?
483                wrappedPixelRef.fWrappedPixelRef : &wrappedPixelRef)
484{
485    SkASSERT(fWrappedPixelRef);
486    SkSafeRef(fWrappedPixelRef);
487
488    // don't need to initialize these, as all the relevant logic delegates to the wrapped ref
489    fStorageObj = NULL;
490    fHasGlobalRef = false;
491    fGlobalRefCnt = 0;
492    fOnJavaHeap = false;
493}
494
495AndroidPixelRef::~AndroidPixelRef() {
496    if (fWrappedPixelRef) {
497        SkSafeUnref(fWrappedPixelRef);
498    } else if (fOnJavaHeap) {
499        JNIEnv* env = vm2env(fVM);
500
501        if (fStorageObj && fHasGlobalRef) {
502            env->DeleteGlobalRef(fStorageObj);
503        }
504        fStorageObj = NULL;
505    }
506}
507jbyteArray AndroidPixelRef::getStorageObj() {
508    if (fWrappedPixelRef) {
509        return fWrappedPixelRef->fStorageObj;
510    }
511    return fStorageObj;
512}
513
514void AndroidPixelRef::setLocalJNIRef(jbyteArray arr) {
515    if (fWrappedPixelRef) {
516        // delegate java obj management to the wrapped ref
517        fWrappedPixelRef->setLocalJNIRef(arr);
518    } else if (!fHasGlobalRef) {
519        fStorageObj = arr;
520    }
521}
522
523void AndroidPixelRef::globalRef(void* localref) {
524    if (fWrappedPixelRef) {
525        // delegate java obj management to the wrapped ref
526        fWrappedPixelRef->globalRef(localref);
527
528        // Note: we only ref and unref the wrapped AndroidPixelRef so that
529        // bitmap->pixelRef()->globalRef() and globalUnref() can be used in a pair, even if
530        // the bitmap has its underlying AndroidPixelRef swapped out/wrapped
531        return;
532    }
533    if (fOnJavaHeap && sk_atomic_inc(&fGlobalRefCnt) == 0) {
534        JNIEnv *env = vm2env(fVM);
535
536        // If JNI ref was passed, it is always used
537        if (localref) fStorageObj = (jbyteArray) localref;
538
539        if (fStorageObj == NULL) {
540            SkDebugf("No valid local ref to create a JNI global ref\n");
541            sk_throw();
542        }
543        if (fHasGlobalRef) {
544            // This should never happen
545            SkDebugf("Already holding a JNI global ref");
546            sk_throw();
547        }
548
549        fStorageObj = (jbyteArray) env->NewGlobalRef(fStorageObj);
550        // TODO: Check for failure here
551        fHasGlobalRef = true;
552    }
553    ref();
554}
555
556void AndroidPixelRef::globalUnref() {
557    if (fWrappedPixelRef) {
558        // delegate java obj management to the wrapped ref
559        fWrappedPixelRef->globalUnref();
560        return;
561    }
562    if (fOnJavaHeap && sk_atomic_dec(&fGlobalRefCnt) == 1) {
563        JNIEnv *env = vm2env(fVM);
564        if (!fHasGlobalRef) {
565            SkDebugf("We don't have a global ref!");
566            sk_throw();
567        }
568        env->DeleteGlobalRef(fStorageObj);
569        fStorageObj = NULL;
570        fHasGlobalRef = false;
571    }
572    unref();
573}
574
575///////////////////////////////////////////////////////////////////////////////
576
577jbyteArray GraphicsJNI::allocateJavaPixelRef(JNIEnv* env, SkBitmap* bitmap,
578                                             SkColorTable* ctable) {
579    const SkImageInfo& info = bitmap->info();
580    if (info.fColorType == kUnknown_SkColorType) {
581        doThrowIAE(env, "unknown bitmap configuration");
582        return NULL;
583    }
584
585    const size_t size = bitmap->getSize();
586    jbyteArray arrayObj = (jbyteArray) env->CallObjectMethod(gVMRuntime,
587                                                             gVMRuntime_newNonMovableArray,
588                                                             gByte_class, size);
589    if (env->ExceptionCheck() != 0) {
590        return NULL;
591    }
592    SkASSERT(arrayObj);
593    jbyte* addr = (jbyte*) env->CallLongMethod(gVMRuntime, gVMRuntime_addressOf, arrayObj);
594    if (env->ExceptionCheck() != 0) {
595        return NULL;
596    }
597    SkASSERT(addr);
598    SkPixelRef* pr = new AndroidPixelRef(env, info, (void*) addr,
599            bitmap->rowBytes(), arrayObj, ctable);
600    bitmap->setPixelRef(pr)->unref();
601    // since we're already allocated, we lockPixels right away
602    // HeapAllocator behaves this way too
603    bitmap->lockPixels();
604
605    return arrayObj;
606}
607
608///////////////////////////////////////////////////////////////////////////////
609
610JavaPixelAllocator::JavaPixelAllocator(JNIEnv* env)
611    : fStorageObj(NULL),
612      fAllocCount(0) {
613    if (env->GetJavaVM(&fVM) != JNI_OK) {
614        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
615        sk_throw();
616    }
617}
618
619bool JavaPixelAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
620    JNIEnv* env = vm2env(fVM);
621
622    fStorageObj = GraphicsJNI::allocateJavaPixelRef(env, bitmap, ctable);
623    fAllocCount += 1;
624    return fStorageObj != NULL;
625}
626
627////////////////////////////////////////////////////////////////////////////////
628
629JavaHeapBitmapRef::JavaHeapBitmapRef(JNIEnv* env, SkBitmap* nativeBitmap, jbyteArray buffer) {
630    fEnv = env;
631    fNativeBitmap = nativeBitmap;
632    fBuffer = buffer;
633
634    // If the buffer is NULL, the backing memory wasn't allocated on the Java heap
635    if (fBuffer) {
636        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(fBuffer);
637    }
638}
639
640JavaHeapBitmapRef::~JavaHeapBitmapRef() {
641    if (fBuffer) {
642        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(NULL);
643    }
644}
645
646////////////////////////////////////////////////////////////////////////////////
647
648static jclass make_globalref(JNIEnv* env, const char classname[])
649{
650    jclass c = env->FindClass(classname);
651    SkASSERT(c);
652    return (jclass) env->NewGlobalRef(c);
653}
654
655static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz,
656                                const char fieldname[], const char type[])
657{
658    jfieldID id = env->GetFieldID(clazz, fieldname, type);
659    SkASSERT(id);
660    return id;
661}
662
663int register_android_graphics_Graphics(JNIEnv* env)
664{
665    jmethodID m;
666    jclass c;
667
668    gRect_class = make_globalref(env, "android/graphics/Rect");
669    gRect_leftFieldID = getFieldIDCheck(env, gRect_class, "left", "I");
670    gRect_topFieldID = getFieldIDCheck(env, gRect_class, "top", "I");
671    gRect_rightFieldID = getFieldIDCheck(env, gRect_class, "right", "I");
672    gRect_bottomFieldID = getFieldIDCheck(env, gRect_class, "bottom", "I");
673
674    gRectF_class = make_globalref(env, "android/graphics/RectF");
675    gRectF_leftFieldID = getFieldIDCheck(env, gRectF_class, "left", "F");
676    gRectF_topFieldID = getFieldIDCheck(env, gRectF_class, "top", "F");
677    gRectF_rightFieldID = getFieldIDCheck(env, gRectF_class, "right", "F");
678    gRectF_bottomFieldID = getFieldIDCheck(env, gRectF_class, "bottom", "F");
679
680    gPoint_class = make_globalref(env, "android/graphics/Point");
681    gPoint_xFieldID = getFieldIDCheck(env, gPoint_class, "x", "I");
682    gPoint_yFieldID = getFieldIDCheck(env, gPoint_class, "y", "I");
683
684    gPointF_class = make_globalref(env, "android/graphics/PointF");
685    gPointF_xFieldID = getFieldIDCheck(env, gPointF_class, "x", "F");
686    gPointF_yFieldID = getFieldIDCheck(env, gPointF_class, "y", "F");
687
688    gBitmap_class = make_globalref(env, "android/graphics/Bitmap");
689    gBitmap_nativeInstanceID = getFieldIDCheck(env, gBitmap_class, "mNativeBitmap", "J");
690    gBitmap_constructorMethodID = env->GetMethodID(gBitmap_class, "<init>", "(J[BIIIZZ[B[I)V");
691    gBitmap_reinitMethodID = env->GetMethodID(gBitmap_class, "reinit", "(IIZ)V");
692    gBitmap_getAllocationByteCountMethodID = env->GetMethodID(gBitmap_class, "getAllocationByteCount", "()I");
693    gBitmapRegionDecoder_class = make_globalref(env, "android/graphics/BitmapRegionDecoder");
694    gBitmapRegionDecoder_constructorMethodID = env->GetMethodID(gBitmapRegionDecoder_class, "<init>", "(J)V");
695
696    gBitmapConfig_class = make_globalref(env, "android/graphics/Bitmap$Config");
697    gBitmapConfig_nativeInstanceID = getFieldIDCheck(env, gBitmapConfig_class,
698                                                     "nativeInt", "I");
699
700    gCanvas_class = make_globalref(env, "android/graphics/Canvas");
701    gCanvas_nativeInstanceID = getFieldIDCheck(env, gCanvas_class, "mNativeCanvas", "J");
702
703    gPaint_class = make_globalref(env, "android/graphics/Paint");
704    gPaint_nativeInstanceID = getFieldIDCheck(env, gPaint_class, "mNativePaint", "J");
705    gPaint_nativeTypefaceID = getFieldIDCheck(env, gPaint_class, "mNativeTypeface", "J");
706
707    gPicture_class = make_globalref(env, "android/graphics/Picture");
708    gPicture_nativeInstanceID = getFieldIDCheck(env, gPicture_class, "mNativePicture", "J");
709
710    gRegion_class = make_globalref(env, "android/graphics/Region");
711    gRegion_nativeInstanceID = getFieldIDCheck(env, gRegion_class, "mNativeRegion", "J");
712    gRegion_constructorMethodID = env->GetMethodID(gRegion_class, "<init>",
713        "(JI)V");
714
715    c = env->FindClass("java/lang/Byte");
716    gByte_class = (jclass) env->NewGlobalRef(
717        env->GetStaticObjectField(c, env->GetStaticFieldID(c, "TYPE", "Ljava/lang/Class;")));
718
719    gVMRuntime_class = make_globalref(env, "dalvik/system/VMRuntime");
720    m = env->GetStaticMethodID(gVMRuntime_class, "getRuntime", "()Ldalvik/system/VMRuntime;");
721    gVMRuntime = env->NewGlobalRef(env->CallStaticObjectMethod(gVMRuntime_class, m));
722    gVMRuntime_newNonMovableArray = env->GetMethodID(gVMRuntime_class, "newNonMovableArray",
723                                                     "(Ljava/lang/Class;I)Ljava/lang/Object;");
724    gVMRuntime_addressOf = env->GetMethodID(gVMRuntime_class, "addressOf", "(Ljava/lang/Object;)J");
725
726    return 0;
727}
728