Graphics.cpp revision 8790be6de3644e332ec6a17c855da89ffc13a9bf 
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
355// Assert that bitmap's SkAlphaType is consistent with isPremultiplied.
356static void assert_premultiplied(const SkBitmap& bitmap, bool isPremultiplied) {
357    // kOpaque_SkAlphaType and kIgnore_SkAlphaType mean that isPremultiplied is
358    // irrelevant. This just tests to ensure that the SkAlphaType is not
359    // opposite of isPremultiplied.
360    if (isPremultiplied) {
361        SkASSERT(bitmap.alphaType() != kUnpremul_SkAlphaType);
362    } else {
363        SkASSERT(bitmap.alphaType() != kPremul_SkAlphaType);
364    }
365}
366
367jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, jbyteArray buffer,
368        int bitmapCreateFlags, jbyteArray ninepatch, jintArray layoutbounds, int density)
369{
370    SkASSERT(bitmap);
371    SkASSERT(bitmap->pixelRef());
372    bool isMutable = bitmapCreateFlags & kBitmapCreateFlag_Mutable;
373    bool isPremultiplied = bitmapCreateFlags & kBitmapCreateFlag_Premultiplied;
374
375    // The caller needs to have already set the alpha type properly, so the
376    // native SkBitmap stays in sync with the Java Bitmap.
377    assert_premultiplied(*bitmap, isPremultiplied);
378
379    jobject obj = env->NewObject(gBitmap_class, gBitmap_constructorMethodID,
380            static_cast<jint>(reinterpret_cast<uintptr_t>(bitmap)), buffer,
381            bitmap->width(), bitmap->height(), density, isMutable, isPremultiplied,
382            ninepatch, layoutbounds);
383    hasException(env); // For the side effect of logging.
384    return obj;
385}
386
387jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, int bitmapCreateFlags,
388        jbyteArray ninepatch, int density)
389{
390    return createBitmap(env, bitmap, NULL, bitmapCreateFlags, ninepatch, NULL, density);
391}
392
393void GraphicsJNI::reinitBitmap(JNIEnv* env, jobject javaBitmap, SkBitmap* bitmap,
394        bool isPremultiplied)
395{
396    // The caller needs to have already set the alpha type properly, so the
397    // native SkBitmap stays in sync with the Java Bitmap.
398    assert_premultiplied(*bitmap, isPremultiplied);
399
400    env->CallVoidMethod(javaBitmap, gBitmap_reinitMethodID,
401            bitmap->width(), bitmap->height(), isPremultiplied);
402}
403
404int GraphicsJNI::getBitmapAllocationByteCount(JNIEnv* env, jobject javaBitmap)
405{
406    return env->CallIntMethod(javaBitmap, gBitmap_getAllocationByteCountMethodID);
407}
408
409jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap)
410{
411    SkASSERT(bitmap != NULL);
412
413    jobject obj = env->NewObject(gBitmapRegionDecoder_class,
414            gBitmapRegionDecoder_constructorMethodID,
415            static_cast<jint>(reinterpret_cast<uintptr_t>(bitmap)));
416    hasException(env); // For the side effect of logging.
417    return obj;
418}
419
420jobject GraphicsJNI::createRegion(JNIEnv* env, SkRegion* region)
421{
422    SkASSERT(region != NULL);
423    jobject obj = env->NewObject(gRegion_class, gRegion_constructorMethodID,
424            static_cast<jint>(reinterpret_cast<uintptr_t>(region)), 0);
425    hasException(env); // For the side effect of logging.
426    return obj;
427}
428
429static JNIEnv* vm2env(JavaVM* vm)
430{
431    JNIEnv* env = NULL;
432    if (vm->GetEnv((void**)&env, JNI_VERSION_1_4) != JNI_OK || NULL == env)
433    {
434        SkDebugf("------- [%p] vm->GetEnv() failed\n", vm);
435        sk_throw();
436    }
437    return env;
438}
439
440///////////////////////////////////////////////////////////////////////////////
441
442AndroidPixelRef::AndroidPixelRef(JNIEnv* env, void* storage, size_t size, jbyteArray storageObj,
443        SkColorTable* ctable) : SkMallocPixelRef(storage, size, ctable, (storageObj == NULL)),
444        fWrappedPixelRef(NULL) {
445    SkASSERT(storage);
446    SkASSERT(env);
447
448    if (env->GetJavaVM(&fVM) != JNI_OK) {
449        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
450        sk_throw();
451    }
452    fStorageObj = storageObj;
453    fHasGlobalRef = false;
454    fGlobalRefCnt = 0;
455
456    // If storageObj is NULL, the memory was NOT allocated on the Java heap
457    fOnJavaHeap = (storageObj != NULL);
458
459}
460
461AndroidPixelRef::AndroidPixelRef(AndroidPixelRef& wrappedPixelRef, SkColorTable* ctable) :
462        SkMallocPixelRef(wrappedPixelRef.getAddr(), wrappedPixelRef.getSize(), ctable, false),
463        fWrappedPixelRef(wrappedPixelRef.fWrappedPixelRef ?
464            wrappedPixelRef.fWrappedPixelRef : &wrappedPixelRef)
465{
466    SkASSERT(fWrappedPixelRef);
467    SkSafeRef(fWrappedPixelRef);
468
469    // don't need to initialize these, as all the relevant logic delegates to the wrapped ref
470    fStorageObj = NULL;
471    fHasGlobalRef = false;
472    fGlobalRefCnt = 0;
473    fOnJavaHeap = false;
474}
475
476AndroidPixelRef::~AndroidPixelRef() {
477    if (fWrappedPixelRef) {
478        SkSafeUnref(fWrappedPixelRef);
479    } else if (fOnJavaHeap) {
480        JNIEnv* env = vm2env(fVM);
481
482        if (fStorageObj && fHasGlobalRef) {
483            env->DeleteGlobalRef(fStorageObj);
484        }
485        fStorageObj = NULL;
486    }
487}
488jbyteArray AndroidPixelRef::getStorageObj() {
489    if (fWrappedPixelRef) {
490        return fWrappedPixelRef->fStorageObj;
491    }
492    return fStorageObj;
493}
494
495void AndroidPixelRef::setLocalJNIRef(jbyteArray arr) {
496    if (fWrappedPixelRef) {
497        // delegate java obj management to the wrapped ref
498        fWrappedPixelRef->setLocalJNIRef(arr);
499    } else if (!fHasGlobalRef) {
500        fStorageObj = arr;
501    }
502}
503
504void AndroidPixelRef::globalRef(void* localref) {
505    if (fWrappedPixelRef) {
506        // delegate java obj management to the wrapped ref
507        fWrappedPixelRef->globalRef(localref);
508
509        // Note: we only ref and unref the wrapped AndroidPixelRef so that
510        // bitmap->pixelRef()->globalRef() and globalUnref() can be used in a pair, even if
511        // the bitmap has its underlying AndroidPixelRef swapped out/wrapped
512        return;
513    }
514    if (fOnJavaHeap && sk_atomic_inc(&fGlobalRefCnt) == 0) {
515        JNIEnv *env = vm2env(fVM);
516
517        // If JNI ref was passed, it is always used
518        if (localref) fStorageObj = (jbyteArray) localref;
519
520        if (fStorageObj == NULL) {
521            SkDebugf("No valid local ref to create a JNI global ref\n");
522            sk_throw();
523        }
524        if (fHasGlobalRef) {
525            // This should never happen
526            SkDebugf("Already holding a JNI global ref");
527            sk_throw();
528        }
529
530        fStorageObj = (jbyteArray) env->NewGlobalRef(fStorageObj);
531        // TODO: Check for failure here
532        fHasGlobalRef = true;
533    }
534    ref();
535}
536
537void AndroidPixelRef::globalUnref() {
538    if (fWrappedPixelRef) {
539        // delegate java obj management to the wrapped ref
540        fWrappedPixelRef->globalUnref();
541        return;
542    }
543    if (fOnJavaHeap && sk_atomic_dec(&fGlobalRefCnt) == 1) {
544        JNIEnv *env = vm2env(fVM);
545        if (!fHasGlobalRef) {
546            SkDebugf("We don't have a global ref!");
547            sk_throw();
548        }
549        env->DeleteGlobalRef(fStorageObj);
550        fStorageObj = NULL;
551        fHasGlobalRef = false;
552    }
553    unref();
554}
555
556///////////////////////////////////////////////////////////////////////////////
557
558jbyteArray GraphicsJNI::allocateJavaPixelRef(JNIEnv* env, SkBitmap* bitmap,
559                                             SkColorTable* ctable) {
560    Sk64 size64 = bitmap->getSize64();
561    if (size64.isNeg() || !size64.is32()) {
562        jniThrowException(env, "java/lang/IllegalArgumentException",
563                          "bitmap size exceeds 32bits");
564        return NULL;
565    }
566    size_t size = size64.get32();
567    jbyteArray arrayObj = (jbyteArray) env->CallObjectMethod(gVMRuntime,
568                                                             gVMRuntime_newNonMovableArray,
569                                                             gByte_class, size);
570    if (env->ExceptionCheck() != 0) {
571        return NULL;
572    }
573    SkASSERT(arrayObj);
574    jbyte* addr = (jbyte*) env->CallLongMethod(gVMRuntime, gVMRuntime_addressOf, arrayObj);
575    if (env->ExceptionCheck() != 0) {
576        return NULL;
577    }
578    SkASSERT(addr);
579    SkPixelRef* pr = new AndroidPixelRef(env, (void*) addr, size, arrayObj, ctable);
580    bitmap->setPixelRef(pr)->unref();
581    // since we're already allocated, we lockPixels right away
582    // HeapAllocator behaves this way too
583    bitmap->lockPixels();
584
585    return arrayObj;
586}
587
588///////////////////////////////////////////////////////////////////////////////
589
590JavaPixelAllocator::JavaPixelAllocator(JNIEnv* env)
591    : fStorageObj(NULL),
592      fAllocCount(0) {
593    if (env->GetJavaVM(&fVM) != JNI_OK) {
594        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
595        sk_throw();
596    }
597}
598
599bool JavaPixelAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
600    JNIEnv* env = vm2env(fVM);
601
602    fStorageObj = GraphicsJNI::allocateJavaPixelRef(env, bitmap, ctable);
603    fAllocCount += 1;
604    return fStorageObj != NULL;
605}
606
607////////////////////////////////////////////////////////////////////////////////
608
609JavaHeapBitmapRef::JavaHeapBitmapRef(JNIEnv* env, SkBitmap* nativeBitmap, jbyteArray buffer) {
610    fEnv = env;
611    fNativeBitmap = nativeBitmap;
612    fBuffer = buffer;
613
614    // If the buffer is NULL, the backing memory wasn't allocated on the Java heap
615    if (fBuffer) {
616        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(fBuffer);
617    }
618}
619
620JavaHeapBitmapRef::~JavaHeapBitmapRef() {
621    if (fBuffer) {
622        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(NULL);
623    }
624}
625
626////////////////////////////////////////////////////////////////////////////////
627
628static jclass make_globalref(JNIEnv* env, const char classname[])
629{
630    jclass c = env->FindClass(classname);
631    SkASSERT(c);
632    return (jclass) env->NewGlobalRef(c);
633}
634
635static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz,
636                                const char fieldname[], const char type[])
637{
638    jfieldID id = env->GetFieldID(clazz, fieldname, type);
639    SkASSERT(id);
640    return id;
641}
642
643int register_android_graphics_Graphics(JNIEnv* env)
644{
645    jmethodID m;
646    jclass c;
647
648    gRect_class = make_globalref(env, "android/graphics/Rect");
649    gRect_leftFieldID = getFieldIDCheck(env, gRect_class, "left", "I");
650    gRect_topFieldID = getFieldIDCheck(env, gRect_class, "top", "I");
651    gRect_rightFieldID = getFieldIDCheck(env, gRect_class, "right", "I");
652    gRect_bottomFieldID = getFieldIDCheck(env, gRect_class, "bottom", "I");
653
654    gRectF_class = make_globalref(env, "android/graphics/RectF");
655    gRectF_leftFieldID = getFieldIDCheck(env, gRectF_class, "left", "F");
656    gRectF_topFieldID = getFieldIDCheck(env, gRectF_class, "top", "F");
657    gRectF_rightFieldID = getFieldIDCheck(env, gRectF_class, "right", "F");
658    gRectF_bottomFieldID = getFieldIDCheck(env, gRectF_class, "bottom", "F");
659
660    gPoint_class = make_globalref(env, "android/graphics/Point");
661    gPoint_xFieldID = getFieldIDCheck(env, gPoint_class, "x", "I");
662    gPoint_yFieldID = getFieldIDCheck(env, gPoint_class, "y", "I");
663
664    gPointF_class = make_globalref(env, "android/graphics/PointF");
665    gPointF_xFieldID = getFieldIDCheck(env, gPointF_class, "x", "F");
666    gPointF_yFieldID = getFieldIDCheck(env, gPointF_class, "y", "F");
667
668    gBitmap_class = make_globalref(env, "android/graphics/Bitmap");
669    gBitmap_nativeInstanceID = getFieldIDCheck(env, gBitmap_class, "mNativeBitmap", "I");
670    gBitmap_constructorMethodID = env->GetMethodID(gBitmap_class, "<init>", "(I[BIIIZZ[B[I)V");
671    gBitmap_reinitMethodID = env->GetMethodID(gBitmap_class, "reinit", "(IIZ)V");
672    gBitmap_getAllocationByteCountMethodID = env->GetMethodID(gBitmap_class, "getAllocationByteCount", "()I");
673    gBitmapRegionDecoder_class = make_globalref(env, "android/graphics/BitmapRegionDecoder");
674    gBitmapRegionDecoder_constructorMethodID = env->GetMethodID(gBitmapRegionDecoder_class, "<init>", "(I)V");
675
676    gBitmapConfig_class = make_globalref(env, "android/graphics/Bitmap$Config");
677    gBitmapConfig_nativeInstanceID = getFieldIDCheck(env, gBitmapConfig_class,
678                                                     "nativeInt", "I");
679
680    gCanvas_class = make_globalref(env, "android/graphics/Canvas");
681    gCanvas_nativeInstanceID = getFieldIDCheck(env, gCanvas_class, "mNativeCanvas", "I");
682
683    gPaint_class = make_globalref(env, "android/graphics/Paint");
684    gPaint_nativeInstanceID = getFieldIDCheck(env, gPaint_class, "mNativePaint", "I");
685
686    gPicture_class = make_globalref(env, "android/graphics/Picture");
687    gPicture_nativeInstanceID = getFieldIDCheck(env, gPicture_class, "mNativePicture", "I");
688
689    gRegion_class = make_globalref(env, "android/graphics/Region");
690    gRegion_nativeInstanceID = getFieldIDCheck(env, gRegion_class, "mNativeRegion", "I");
691    gRegion_constructorMethodID = env->GetMethodID(gRegion_class, "<init>",
692        "(II)V");
693
694    c = env->FindClass("java/lang/Byte");
695    gByte_class = (jclass) env->NewGlobalRef(
696        env->GetStaticObjectField(c, env->GetStaticFieldID(c, "TYPE", "Ljava/lang/Class;")));
697
698    gVMRuntime_class = make_globalref(env, "dalvik/system/VMRuntime");
699    m = env->GetStaticMethodID(gVMRuntime_class, "getRuntime", "()Ldalvik/system/VMRuntime;");
700    gVMRuntime = env->NewGlobalRef(env->CallStaticObjectMethod(gVMRuntime_class, m));
701    gVMRuntime_newNonMovableArray = env->GetMethodID(gVMRuntime_class, "newNonMovableArray",
702                                                     "(Ljava/lang/Class;I)Ljava/lang/Object;");
703    gVMRuntime_addressOf = env->GetMethodID(gVMRuntime_class, "addressOf", "(Ljava/lang/Object;)J");
704
705    return 0;
706}
707