Graphics.cpp revision ab22c1c792bc5f422a029a4ab6a23861e44136d8 
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 "SkPicture.h"
12#include "SkRegion.h"
13#include <android_runtime/AndroidRuntime.h>
14
15void doThrowNPE(JNIEnv* env) {
16    jniThrowNullPointerException(env, NULL);
17}
18
19void doThrowAIOOBE(JNIEnv* env) {
20    jniThrowException(env, "java/lang/ArrayIndexOutOfBoundsException", NULL);
21}
22
23void doThrowRE(JNIEnv* env, const char* msg) {
24    jniThrowRuntimeException(env, msg);
25}
26
27void doThrowIAE(JNIEnv* env, const char* msg) {
28    jniThrowException(env, "java/lang/IllegalArgumentException", msg);
29}
30
31void doThrowISE(JNIEnv* env, const char* msg) {
32    jniThrowException(env, "java/lang/IllegalStateException", msg);
33}
34
35void doThrowOOME(JNIEnv* env, const char* msg) {
36    jniThrowException(env, "java/lang/OutOfMemoryError", msg);
37}
38
39void doThrowIOE(JNIEnv* env, const char* msg) {
40    jniThrowException(env, "java/io/IOException", msg);
41}
42
43bool GraphicsJNI::hasException(JNIEnv *env) {
44    if (env->ExceptionCheck() != 0) {
45        ALOGE("*** Uncaught exception returned from Java call!\n");
46        env->ExceptionDescribe();
47        return true;
48    }
49    return false;
50}
51
52///////////////////////////////////////////////////////////////////////////////
53
54AutoJavaFloatArray::AutoJavaFloatArray(JNIEnv* env, jfloatArray array,
55                                       int minLength, JNIAccess access)
56: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
57    SkASSERT(env);
58    if (array) {
59        fLen = env->GetArrayLength(array);
60        if (fLen < minLength) {
61            sk_throw();
62        }
63        fPtr = env->GetFloatArrayElements(array, NULL);
64    }
65    fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0;
66}
67
68AutoJavaFloatArray::~AutoJavaFloatArray() {
69    if (fPtr) {
70        fEnv->ReleaseFloatArrayElements(fArray, fPtr, fReleaseMode);
71    }
72}
73
74AutoJavaIntArray::AutoJavaIntArray(JNIEnv* env, jintArray array,
75                                       int minLength)
76: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
77    SkASSERT(env);
78    if (array) {
79        fLen = env->GetArrayLength(array);
80        if (fLen < minLength) {
81            sk_throw();
82        }
83        fPtr = env->GetIntArrayElements(array, NULL);
84    }
85}
86
87AutoJavaIntArray::~AutoJavaIntArray() {
88    if (fPtr) {
89        fEnv->ReleaseIntArrayElements(fArray, fPtr, 0);
90    }
91}
92
93AutoJavaShortArray::AutoJavaShortArray(JNIEnv* env, jshortArray array,
94                                       int minLength, JNIAccess access)
95: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
96    SkASSERT(env);
97    if (array) {
98        fLen = env->GetArrayLength(array);
99        if (fLen < minLength) {
100            sk_throw();
101        }
102        fPtr = env->GetShortArrayElements(array, NULL);
103    }
104    fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0;
105}
106
107AutoJavaShortArray::~AutoJavaShortArray() {
108    if (fPtr) {
109        fEnv->ReleaseShortArrayElements(fArray, fPtr, fReleaseMode);
110    }
111}
112
113AutoJavaByteArray::AutoJavaByteArray(JNIEnv* env, jbyteArray array,
114                                       int minLength)
115: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
116    SkASSERT(env);
117    if (array) {
118        fLen = env->GetArrayLength(array);
119        if (fLen < minLength) {
120            sk_throw();
121        }
122        fPtr = env->GetByteArrayElements(array, NULL);
123    }
124}
125
126AutoJavaByteArray::~AutoJavaByteArray() {
127    if (fPtr) {
128        fEnv->ReleaseByteArrayElements(fArray, fPtr, 0);
129    }
130}
131
132///////////////////////////////////////////////////////////////////////////////
133
134static jclass   gRect_class;
135static jfieldID gRect_leftFieldID;
136static jfieldID gRect_topFieldID;
137static jfieldID gRect_rightFieldID;
138static jfieldID gRect_bottomFieldID;
139
140static jclass   gRectF_class;
141static jfieldID gRectF_leftFieldID;
142static jfieldID gRectF_topFieldID;
143static jfieldID gRectF_rightFieldID;
144static jfieldID gRectF_bottomFieldID;
145
146static jclass   gPoint_class;
147static jfieldID gPoint_xFieldID;
148static jfieldID gPoint_yFieldID;
149
150static jclass   gPointF_class;
151static jfieldID gPointF_xFieldID;
152static jfieldID gPointF_yFieldID;
153
154static jclass   gBitmap_class;
155static jfieldID gBitmap_nativeInstanceID;
156static jmethodID gBitmap_constructorMethodID;
157static jmethodID gBitmap_reinitMethodID;
158static jmethodID gBitmap_getAllocationByteCountMethodID;
159
160static jclass   gBitmapConfig_class;
161static jfieldID gBitmapConfig_nativeInstanceID;
162
163static jclass   gBitmapRegionDecoder_class;
164static jmethodID gBitmapRegionDecoder_constructorMethodID;
165
166static jclass   gCanvas_class;
167static jfieldID gCanvas_nativeInstanceID;
168
169static jclass   gPicture_class;
170static jfieldID gPicture_nativeInstanceID;
171
172static jclass   gRegion_class;
173static jfieldID gRegion_nativeInstanceID;
174static jmethodID gRegion_constructorMethodID;
175
176static jclass    gByte_class;
177static jobject   gVMRuntime;
178static jclass    gVMRuntime_class;
179static jmethodID gVMRuntime_newNonMovableArray;
180static jmethodID gVMRuntime_addressOf;
181
182///////////////////////////////////////////////////////////////////////////////
183
184void GraphicsJNI::get_jrect(JNIEnv* env, jobject obj, int* L, int* T, int* R, int* B)
185{
186    SkASSERT(env->IsInstanceOf(obj, gRect_class));
187
188    *L = env->GetIntField(obj, gRect_leftFieldID);
189    *T = env->GetIntField(obj, gRect_topFieldID);
190    *R = env->GetIntField(obj, gRect_rightFieldID);
191    *B = env->GetIntField(obj, gRect_bottomFieldID);
192}
193
194void GraphicsJNI::set_jrect(JNIEnv* env, jobject obj, int L, int T, int R, int B)
195{
196    SkASSERT(env->IsInstanceOf(obj, gRect_class));
197
198    env->SetIntField(obj, gRect_leftFieldID, L);
199    env->SetIntField(obj, gRect_topFieldID, T);
200    env->SetIntField(obj, gRect_rightFieldID, R);
201    env->SetIntField(obj, gRect_bottomFieldID, B);
202}
203
204SkIRect* GraphicsJNI::jrect_to_irect(JNIEnv* env, jobject obj, SkIRect* ir)
205{
206    SkASSERT(env->IsInstanceOf(obj, gRect_class));
207
208    ir->set(env->GetIntField(obj, gRect_leftFieldID),
209            env->GetIntField(obj, gRect_topFieldID),
210            env->GetIntField(obj, gRect_rightFieldID),
211            env->GetIntField(obj, gRect_bottomFieldID));
212    return ir;
213}
214
215void GraphicsJNI::irect_to_jrect(const SkIRect& ir, JNIEnv* env, jobject obj)
216{
217    SkASSERT(env->IsInstanceOf(obj, gRect_class));
218
219    env->SetIntField(obj, gRect_leftFieldID, ir.fLeft);
220    env->SetIntField(obj, gRect_topFieldID, ir.fTop);
221    env->SetIntField(obj, gRect_rightFieldID, ir.fRight);
222    env->SetIntField(obj, gRect_bottomFieldID, ir.fBottom);
223}
224
225SkRect* GraphicsJNI::jrectf_to_rect(JNIEnv* env, jobject obj, SkRect* r)
226{
227    SkASSERT(env->IsInstanceOf(obj, gRectF_class));
228
229    r->set(env->GetFloatField(obj, gRectF_leftFieldID),
230           env->GetFloatField(obj, gRectF_topFieldID),
231           env->GetFloatField(obj, gRectF_rightFieldID),
232           env->GetFloatField(obj, gRectF_bottomFieldID));
233    return r;
234}
235
236SkRect* GraphicsJNI::jrect_to_rect(JNIEnv* env, jobject obj, SkRect* r)
237{
238    SkASSERT(env->IsInstanceOf(obj, gRect_class));
239
240    r->set(SkIntToScalar(env->GetIntField(obj, gRect_leftFieldID)),
241           SkIntToScalar(env->GetIntField(obj, gRect_topFieldID)),
242           SkIntToScalar(env->GetIntField(obj, gRect_rightFieldID)),
243           SkIntToScalar(env->GetIntField(obj, gRect_bottomFieldID)));
244    return r;
245}
246
247void GraphicsJNI::rect_to_jrectf(const SkRect& r, JNIEnv* env, jobject obj)
248{
249    SkASSERT(env->IsInstanceOf(obj, gRectF_class));
250
251    env->SetFloatField(obj, gRectF_leftFieldID, SkScalarToFloat(r.fLeft));
252    env->SetFloatField(obj, gRectF_topFieldID, SkScalarToFloat(r.fTop));
253    env->SetFloatField(obj, gRectF_rightFieldID, SkScalarToFloat(r.fRight));
254    env->SetFloatField(obj, gRectF_bottomFieldID, SkScalarToFloat(r.fBottom));
255}
256
257SkIPoint* GraphicsJNI::jpoint_to_ipoint(JNIEnv* env, jobject obj, SkIPoint* point)
258{
259    SkASSERT(env->IsInstanceOf(obj, gPoint_class));
260
261    point->set(env->GetIntField(obj, gPoint_xFieldID),
262               env->GetIntField(obj, gPoint_yFieldID));
263    return point;
264}
265
266void GraphicsJNI::ipoint_to_jpoint(const SkIPoint& ir, JNIEnv* env, jobject obj)
267{
268    SkASSERT(env->IsInstanceOf(obj, gPoint_class));
269
270    env->SetIntField(obj, gPoint_xFieldID, ir.fX);
271    env->SetIntField(obj, gPoint_yFieldID, ir.fY);
272}
273
274SkPoint* GraphicsJNI::jpointf_to_point(JNIEnv* env, jobject obj, SkPoint* point)
275{
276    SkASSERT(env->IsInstanceOf(obj, gPointF_class));
277
278    point->set(env->GetIntField(obj, gPointF_xFieldID),
279               env->GetIntField(obj, gPointF_yFieldID));
280    return point;
281}
282
283void GraphicsJNI::point_to_jpointf(const SkPoint& r, JNIEnv* env, jobject obj)
284{
285    SkASSERT(env->IsInstanceOf(obj, gPointF_class));
286
287    env->SetFloatField(obj, gPointF_xFieldID, SkScalarToFloat(r.fX));
288    env->SetFloatField(obj, gPointF_yFieldID, SkScalarToFloat(r.fY));
289}
290
291// This enum must keep these int values, to match the int values
292// in the java Bitmap.Config enum.
293enum LegacyBitmapConfig {
294    kNo_LegacyBitmapConfig          = 0,
295    kA8_LegacyBitmapConfig          = 1,
296    kIndex8_LegacyBitmapConfig      = 2,
297    kRGB_565_LegacyBitmapConfig     = 3,
298    kARGB_4444_LegacyBitmapConfig   = 4,
299    kARGB_8888_LegacyBitmapConfig   = 5,
300
301    kLastEnum_LegacyBitmapConfig = kARGB_8888_LegacyBitmapConfig
302};
303
304jint GraphicsJNI::colorTypeToLegacyBitmapConfig(SkColorType colorType) {
305    switch (colorType) {
306        case kN32_SkColorType:
307            return kARGB_8888_LegacyBitmapConfig;
308        case kARGB_4444_SkColorType:
309            return kARGB_4444_LegacyBitmapConfig;
310        case kRGB_565_SkColorType:
311            return kRGB_565_LegacyBitmapConfig;
312        case kIndex_8_SkColorType:
313            return kIndex8_LegacyBitmapConfig;
314        case kAlpha_8_SkColorType:
315            return kA8_LegacyBitmapConfig;
316        case kUnknown_SkColorType:
317        default:
318            break;
319    }
320    return kNo_LegacyBitmapConfig;
321}
322
323SkColorType GraphicsJNI::legacyBitmapConfigToColorType(jint legacyConfig) {
324    const uint8_t gConfig2ColorType[] = {
325        kUnknown_SkColorType,
326        kAlpha_8_SkColorType,
327        kIndex_8_SkColorType,
328        kRGB_565_SkColorType,
329        kARGB_4444_SkColorType,
330        kN32_SkColorType
331    };
332
333    if (legacyConfig < 0 || legacyConfig > kLastEnum_LegacyBitmapConfig) {
334        legacyConfig = kNo_LegacyBitmapConfig;
335    }
336    return static_cast<SkColorType>(gConfig2ColorType[legacyConfig]);
337}
338
339SkBitmap* GraphicsJNI::getNativeBitmap(JNIEnv* env, jobject bitmap) {
340    SkASSERT(env);
341    SkASSERT(bitmap);
342    SkASSERT(env->IsInstanceOf(bitmap, gBitmap_class));
343    jlong bitmapHandle = env->GetLongField(bitmap, gBitmap_nativeInstanceID);
344    SkBitmap* b = reinterpret_cast<SkBitmap*>(bitmapHandle);
345    SkASSERT(b);
346    return b;
347}
348
349SkColorType GraphicsJNI::getNativeBitmapColorType(JNIEnv* env, jobject jconfig) {
350    SkASSERT(env);
351    if (NULL == jconfig) {
352        return kUnknown_SkColorType;
353    }
354    SkASSERT(env->IsInstanceOf(jconfig, gBitmapConfig_class));
355    int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID);
356    return legacyBitmapConfigToColorType(c);
357}
358
359SkCanvas* GraphicsJNI::getNativeCanvas(JNIEnv* env, jobject canvas) {
360    SkASSERT(env);
361    SkASSERT(canvas);
362    SkASSERT(env->IsInstanceOf(canvas, gCanvas_class));
363    jlong canvasHandle = env->GetLongField(canvas, gCanvas_nativeInstanceID);
364    SkCanvas* c = reinterpret_cast<android::Canvas*>(canvasHandle)->getSkCanvas();
365    SkASSERT(c);
366    return c;
367}
368
369SkRegion* GraphicsJNI::getNativeRegion(JNIEnv* env, jobject region)
370{
371    SkASSERT(env);
372    SkASSERT(region);
373    SkASSERT(env->IsInstanceOf(region, gRegion_class));
374    jlong regionHandle = env->GetLongField(region, gRegion_nativeInstanceID);
375    SkRegion* r = reinterpret_cast<SkRegion*>(regionHandle);
376    SkASSERT(r);
377    return r;
378}
379
380///////////////////////////////////////////////////////////////////////////////////////////
381
382// Assert that bitmap's SkAlphaType is consistent with isPremultiplied.
383static void assert_premultiplied(const SkBitmap& bitmap, bool isPremultiplied) {
384    // kOpaque_SkAlphaType and kIgnore_SkAlphaType mean that isPremultiplied is
385    // irrelevant. This just tests to ensure that the SkAlphaType is not
386    // opposite of isPremultiplied.
387    if (isPremultiplied) {
388        SkASSERT(bitmap.alphaType() != kUnpremul_SkAlphaType);
389    } else {
390        SkASSERT(bitmap.alphaType() != kPremul_SkAlphaType);
391    }
392}
393
394jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, jbyteArray buffer,
395        int bitmapCreateFlags, jbyteArray ninePatchChunk, jobject ninePatchInsets, int density)
396{
397    SkASSERT(bitmap);
398    SkASSERT(bitmap->pixelRef());
399    SkASSERT(!env->ExceptionCheck());
400    bool isMutable = bitmapCreateFlags & kBitmapCreateFlag_Mutable;
401    bool isPremultiplied = bitmapCreateFlags & kBitmapCreateFlag_Premultiplied;
402
403    // The caller needs to have already set the alpha type properly, so the
404    // native SkBitmap stays in sync with the Java Bitmap.
405    assert_premultiplied(*bitmap, isPremultiplied);
406
407    jobject obj = env->NewObject(gBitmap_class, gBitmap_constructorMethodID,
408            reinterpret_cast<jlong>(bitmap), buffer,
409            bitmap->width(), bitmap->height(), density, isMutable, isPremultiplied,
410            ninePatchChunk, ninePatchInsets);
411    hasException(env); // For the side effect of logging.
412    return obj;
413}
414
415void GraphicsJNI::reinitBitmap(JNIEnv* env, jobject javaBitmap, SkBitmap* bitmap,
416        bool isPremultiplied)
417{
418    // The caller needs to have already set the alpha type properly, so the
419    // native SkBitmap stays in sync with the Java Bitmap.
420    assert_premultiplied(*bitmap, isPremultiplied);
421
422    env->CallVoidMethod(javaBitmap, gBitmap_reinitMethodID,
423            bitmap->width(), bitmap->height(), isPremultiplied);
424}
425
426int GraphicsJNI::getBitmapAllocationByteCount(JNIEnv* env, jobject javaBitmap)
427{
428    return env->CallIntMethod(javaBitmap, gBitmap_getAllocationByteCountMethodID);
429}
430
431jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap)
432{
433    SkASSERT(bitmap != NULL);
434
435    jobject obj = env->NewObject(gBitmapRegionDecoder_class,
436            gBitmapRegionDecoder_constructorMethodID,
437            reinterpret_cast<jlong>(bitmap));
438    hasException(env); // For the side effect of logging.
439    return obj;
440}
441
442jobject GraphicsJNI::createRegion(JNIEnv* env, SkRegion* region)
443{
444    SkASSERT(region != NULL);
445    jobject obj = env->NewObject(gRegion_class, gRegion_constructorMethodID,
446                                 reinterpret_cast<jlong>(region), 0);
447    hasException(env); // For the side effect of logging.
448    return obj;
449}
450
451static JNIEnv* vm2env(JavaVM* vm)
452{
453    JNIEnv* env = NULL;
454    if (vm->GetEnv((void**)&env, JNI_VERSION_1_4) != JNI_OK || NULL == env)
455    {
456        SkDebugf("------- [%p] vm->GetEnv() failed\n", vm);
457        sk_throw();
458    }
459    return env;
460}
461
462///////////////////////////////////////////////////////////////////////////////
463
464AndroidPixelRef::AndroidPixelRef(JNIEnv* env, const SkImageInfo& info, void* storage,
465        size_t rowBytes, jbyteArray storageObj, SkColorTable* ctable) :
466        SkMallocPixelRef(info, storage, rowBytes, ctable, (storageObj == NULL)),
467        fWrappedPixelRef(NULL) {
468    SkASSERT(storage);
469    SkASSERT(env);
470
471    if (env->GetJavaVM(&fVM) != JNI_OK) {
472        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
473        sk_throw();
474    }
475    fStorageObj = storageObj;
476    fHasGlobalRef = false;
477    fGlobalRefCnt = 0;
478
479    // If storageObj is NULL, the memory was NOT allocated on the Java heap
480    fOnJavaHeap = (storageObj != NULL);
481
482}
483
484AndroidPixelRef::AndroidPixelRef(AndroidPixelRef& wrappedPixelRef, const SkImageInfo& info,
485        size_t rowBytes, SkColorTable* ctable) :
486        SkMallocPixelRef(info, wrappedPixelRef.getAddr(), rowBytes, ctable, false),
487        fWrappedPixelRef(wrappedPixelRef.fWrappedPixelRef ?
488                wrappedPixelRef.fWrappedPixelRef : &wrappedPixelRef)
489{
490    SkASSERT(fWrappedPixelRef);
491    SkSafeRef(fWrappedPixelRef);
492
493    // don't need to initialize these, as all the relevant logic delegates to the wrapped ref
494    fStorageObj = NULL;
495    fHasGlobalRef = false;
496    fGlobalRefCnt = 0;
497    fOnJavaHeap = false;
498}
499
500AndroidPixelRef::~AndroidPixelRef() {
501    if (fWrappedPixelRef) {
502        SkSafeUnref(fWrappedPixelRef);
503    } else if (fOnJavaHeap) {
504        JNIEnv* env = vm2env(fVM);
505
506        if (fStorageObj && fHasGlobalRef) {
507            env->DeleteGlobalRef(fStorageObj);
508        }
509        fStorageObj = NULL;
510    }
511}
512jbyteArray AndroidPixelRef::getStorageObj() {
513    if (fWrappedPixelRef) {
514        return fWrappedPixelRef->fStorageObj;
515    }
516    return fStorageObj;
517}
518
519void AndroidPixelRef::setLocalJNIRef(jbyteArray arr) {
520    if (fWrappedPixelRef) {
521        // delegate java obj management to the wrapped ref
522        fWrappedPixelRef->setLocalJNIRef(arr);
523    } else if (!fHasGlobalRef) {
524        fStorageObj = arr;
525    }
526}
527
528void AndroidPixelRef::globalRef(void* localref) {
529    if (fWrappedPixelRef) {
530        // delegate java obj management to the wrapped ref
531        fWrappedPixelRef->globalRef(localref);
532
533        // Note: we only ref and unref the wrapped AndroidPixelRef so that
534        // bitmap->pixelRef()->globalRef() and globalUnref() can be used in a pair, even if
535        // the bitmap has its underlying AndroidPixelRef swapped out/wrapped
536        return;
537    }
538    if (fOnJavaHeap && sk_atomic_inc(&fGlobalRefCnt) == 0) {
539        JNIEnv *env = vm2env(fVM);
540
541        // If JNI ref was passed, it is always used
542        if (localref) fStorageObj = (jbyteArray) localref;
543
544        if (fStorageObj == NULL) {
545            SkDebugf("No valid local ref to create a JNI global ref\n");
546            sk_throw();
547        }
548        if (fHasGlobalRef) {
549            // This should never happen
550            SkDebugf("Already holding a JNI global ref");
551            sk_throw();
552        }
553
554        fStorageObj = (jbyteArray) env->NewGlobalRef(fStorageObj);
555        // TODO: Check for failure here
556        fHasGlobalRef = true;
557    }
558    ref();
559}
560
561void AndroidPixelRef::globalUnref() {
562    if (fWrappedPixelRef) {
563        // delegate java obj management to the wrapped ref
564        fWrappedPixelRef->globalUnref();
565        return;
566    }
567    if (fOnJavaHeap && sk_atomic_dec(&fGlobalRefCnt) == 1) {
568        JNIEnv *env = vm2env(fVM);
569        if (!fHasGlobalRef) {
570            SkDebugf("We don't have a global ref!");
571            sk_throw();
572        }
573        env->DeleteGlobalRef(fStorageObj);
574        fStorageObj = NULL;
575        fHasGlobalRef = false;
576    }
577    unref();
578}
579
580///////////////////////////////////////////////////////////////////////////////
581
582jbyteArray GraphicsJNI::allocateJavaPixelRef(JNIEnv* env, SkBitmap* bitmap,
583                                             SkColorTable* ctable) {
584    const SkImageInfo& info = bitmap->info();
585    if (info.fColorType == kUnknown_SkColorType) {
586        doThrowIAE(env, "unknown bitmap configuration");
587        return NULL;
588    }
589
590    const size_t size = bitmap->getSize();
591    jbyteArray arrayObj = (jbyteArray) env->CallObjectMethod(gVMRuntime,
592                                                             gVMRuntime_newNonMovableArray,
593                                                             gByte_class, size);
594    if (env->ExceptionCheck() != 0) {
595        return NULL;
596    }
597    SkASSERT(arrayObj);
598    jbyte* addr = (jbyte*) env->CallLongMethod(gVMRuntime, gVMRuntime_addressOf, arrayObj);
599    if (env->ExceptionCheck() != 0) {
600        return NULL;
601    }
602    SkASSERT(addr);
603    SkPixelRef* pr = new AndroidPixelRef(env, info, (void*) addr,
604            bitmap->rowBytes(), arrayObj, ctable);
605    bitmap->setPixelRef(pr)->unref();
606    // since we're already allocated, we lockPixels right away
607    // HeapAllocator behaves this way too
608    bitmap->lockPixels();
609
610    return arrayObj;
611}
612
613///////////////////////////////////////////////////////////////////////////////
614
615JavaPixelAllocator::JavaPixelAllocator(JNIEnv* env)
616    : fStorageObj(NULL),
617      fAllocCount(0) {
618    if (env->GetJavaVM(&fVM) != JNI_OK) {
619        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
620        sk_throw();
621    }
622}
623
624bool JavaPixelAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
625    JNIEnv* env = vm2env(fVM);
626
627    fStorageObj = GraphicsJNI::allocateJavaPixelRef(env, bitmap, ctable);
628    fAllocCount += 1;
629    return fStorageObj != NULL;
630}
631
632////////////////////////////////////////////////////////////////////////////////
633
634JavaHeapBitmapRef::JavaHeapBitmapRef(JNIEnv* env, SkBitmap* nativeBitmap, jbyteArray buffer) {
635    fEnv = env;
636    fNativeBitmap = nativeBitmap;
637    fBuffer = buffer;
638
639    // If the buffer is NULL, the backing memory wasn't allocated on the Java heap
640    if (fBuffer) {
641        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(fBuffer);
642    }
643}
644
645JavaHeapBitmapRef::~JavaHeapBitmapRef() {
646    if (fBuffer) {
647        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(NULL);
648    }
649}
650
651////////////////////////////////////////////////////////////////////////////////
652
653static jclass make_globalref(JNIEnv* env, const char classname[])
654{
655    jclass c = env->FindClass(classname);
656    SkASSERT(c);
657    return (jclass) env->NewGlobalRef(c);
658}
659
660static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz,
661                                const char fieldname[], const char type[])
662{
663    jfieldID id = env->GetFieldID(clazz, fieldname, type);
664    SkASSERT(id);
665    return id;
666}
667
668int register_android_graphics_Graphics(JNIEnv* env)
669{
670    jmethodID m;
671    jclass c;
672
673    gRect_class = make_globalref(env, "android/graphics/Rect");
674    gRect_leftFieldID = getFieldIDCheck(env, gRect_class, "left", "I");
675    gRect_topFieldID = getFieldIDCheck(env, gRect_class, "top", "I");
676    gRect_rightFieldID = getFieldIDCheck(env, gRect_class, "right", "I");
677    gRect_bottomFieldID = getFieldIDCheck(env, gRect_class, "bottom", "I");
678
679    gRectF_class = make_globalref(env, "android/graphics/RectF");
680    gRectF_leftFieldID = getFieldIDCheck(env, gRectF_class, "left", "F");
681    gRectF_topFieldID = getFieldIDCheck(env, gRectF_class, "top", "F");
682    gRectF_rightFieldID = getFieldIDCheck(env, gRectF_class, "right", "F");
683    gRectF_bottomFieldID = getFieldIDCheck(env, gRectF_class, "bottom", "F");
684
685    gPoint_class = make_globalref(env, "android/graphics/Point");
686    gPoint_xFieldID = getFieldIDCheck(env, gPoint_class, "x", "I");
687    gPoint_yFieldID = getFieldIDCheck(env, gPoint_class, "y", "I");
688
689    gPointF_class = make_globalref(env, "android/graphics/PointF");
690    gPointF_xFieldID = getFieldIDCheck(env, gPointF_class, "x", "F");
691    gPointF_yFieldID = getFieldIDCheck(env, gPointF_class, "y", "F");
692
693    gBitmap_class = make_globalref(env, "android/graphics/Bitmap");
694    gBitmap_nativeInstanceID = getFieldIDCheck(env, gBitmap_class, "mNativeBitmap", "J");
695    gBitmap_constructorMethodID = env->GetMethodID(gBitmap_class, "<init>", "(J[BIIIZZ[BLandroid/graphics/NinePatch$InsetStruct;)V");
696    gBitmap_reinitMethodID = env->GetMethodID(gBitmap_class, "reinit", "(IIZ)V");
697    gBitmap_getAllocationByteCountMethodID = env->GetMethodID(gBitmap_class, "getAllocationByteCount", "()I");
698    gBitmapRegionDecoder_class = make_globalref(env, "android/graphics/BitmapRegionDecoder");
699    gBitmapRegionDecoder_constructorMethodID = env->GetMethodID(gBitmapRegionDecoder_class, "<init>", "(J)V");
700
701    gBitmapConfig_class = make_globalref(env, "android/graphics/Bitmap$Config");
702    gBitmapConfig_nativeInstanceID = getFieldIDCheck(env, gBitmapConfig_class,
703                                                     "nativeInt", "I");
704
705    gCanvas_class = make_globalref(env, "android/graphics/Canvas");
706    gCanvas_nativeInstanceID = getFieldIDCheck(env, gCanvas_class, "mNativeCanvasWrapper", "J");
707
708    gPicture_class = make_globalref(env, "android/graphics/Picture");
709    gPicture_nativeInstanceID = getFieldIDCheck(env, gPicture_class, "mNativePicture", "J");
710
711    gRegion_class = make_globalref(env, "android/graphics/Region");
712    gRegion_nativeInstanceID = getFieldIDCheck(env, gRegion_class, "mNativeRegion", "J");
713    gRegion_constructorMethodID = env->GetMethodID(gRegion_class, "<init>",
714        "(JI)V");
715
716    c = env->FindClass("java/lang/Byte");
717    gByte_class = (jclass) env->NewGlobalRef(
718        env->GetStaticObjectField(c, env->GetStaticFieldID(c, "TYPE", "Ljava/lang/Class;")));
719
720    gVMRuntime_class = make_globalref(env, "dalvik/system/VMRuntime");
721    m = env->GetStaticMethodID(gVMRuntime_class, "getRuntime", "()Ldalvik/system/VMRuntime;");
722    gVMRuntime = env->NewGlobalRef(env->CallStaticObjectMethod(gVMRuntime_class, m));
723    gVMRuntime_newNonMovableArray = env->GetMethodID(gVMRuntime_class, "newNonMovableArray",
724                                                     "(Ljava/lang/Class;I)Ljava/lang/Object;");
725    gVMRuntime_addressOf = env->GetMethodID(gVMRuntime_class, "addressOf", "(Ljava/lang/Object;)J");
726
727    return 0;
728}
729