Graphics.cpp revision 42a1d08df7d417fd4e67eabc91ff05ee77fd9995 
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
304SkColorType GraphicsJNI::getNativeBitmapColorType(JNIEnv* env, jobject jconfig) {
305    SkASSERT(env);
306    if (NULL == jconfig) {
307        return kUnknown_SkColorType;
308    }
309    SkASSERT(env->IsInstanceOf(jconfig, gBitmapConfig_class));
310    int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID);
311    if (c < 0 || c >= SkBitmap::kConfigCount) {
312        c = kUnknown_SkColorType;
313    }
314    return SkBitmapConfigToColorType(static_cast<SkBitmap::Config>(c));
315}
316
317SkCanvas* GraphicsJNI::getNativeCanvas(JNIEnv* env, jobject canvas) {
318    SkASSERT(env);
319    SkASSERT(canvas);
320    SkASSERT(env->IsInstanceOf(canvas, gCanvas_class));
321    jlong canvasHandle = env->GetLongField(canvas, gCanvas_nativeInstanceID);
322    SkCanvas* c = getNativeCanvas(canvasHandle);
323    SkASSERT(c);
324    return c;
325}
326
327SkPaint* GraphicsJNI::getNativePaint(JNIEnv* env, jobject paint) {
328    SkASSERT(env);
329    SkASSERT(paint);
330    SkASSERT(env->IsInstanceOf(paint, gPaint_class));
331    jlong paintHandle = env->GetLongField(paint, gPaint_nativeInstanceID);
332    SkPaint* p = reinterpret_cast<SkPaint*>(paintHandle);
333    SkASSERT(p);
334    return p;
335}
336
337android::TypefaceImpl* GraphicsJNI::getNativeTypeface(JNIEnv* env, jobject paint) {
338    SkASSERT(env);
339    SkASSERT(paint);
340    SkASSERT(env->IsInstanceOf(paint, gPaint_class));
341    jlong typefaceHandle = env->GetLongField(paint, gPaint_nativeTypefaceID);
342    android::TypefaceImpl* p = reinterpret_cast<android::TypefaceImpl*>(typefaceHandle);
343    SkASSERT(p);
344    return p;
345}
346
347SkRegion* GraphicsJNI::getNativeRegion(JNIEnv* env, jobject region)
348{
349    SkASSERT(env);
350    SkASSERT(region);
351    SkASSERT(env->IsInstanceOf(region, gRegion_class));
352    jlong regionHandle = env->GetLongField(region, gRegion_nativeInstanceID);
353    SkRegion* r = reinterpret_cast<SkRegion*>(regionHandle);
354    SkASSERT(r);
355    return r;
356}
357
358///////////////////////////////////////////////////////////////////////////////////////////
359
360// Assert that bitmap's SkAlphaType is consistent with isPremultiplied.
361static void assert_premultiplied(const SkBitmap& bitmap, bool isPremultiplied) {
362    // kOpaque_SkAlphaType and kIgnore_SkAlphaType mean that isPremultiplied is
363    // irrelevant. This just tests to ensure that the SkAlphaType is not
364    // opposite of isPremultiplied.
365    if (isPremultiplied) {
366        SkASSERT(bitmap.alphaType() != kUnpremul_SkAlphaType);
367    } else {
368        SkASSERT(bitmap.alphaType() != kPremul_SkAlphaType);
369    }
370}
371
372jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, jbyteArray buffer,
373        int bitmapCreateFlags, jbyteArray ninepatch, jintArray layoutbounds, int density)
374{
375    SkASSERT(bitmap);
376    SkASSERT(bitmap->pixelRef());
377    bool isMutable = bitmapCreateFlags & kBitmapCreateFlag_Mutable;
378    bool isPremultiplied = bitmapCreateFlags & kBitmapCreateFlag_Premultiplied;
379
380    // The caller needs to have already set the alpha type properly, so the
381    // native SkBitmap stays in sync with the Java Bitmap.
382    assert_premultiplied(*bitmap, isPremultiplied);
383
384    jobject obj = env->NewObject(gBitmap_class, gBitmap_constructorMethodID,
385            reinterpret_cast<jlong>(bitmap), buffer,
386            bitmap->width(), bitmap->height(), density, isMutable, isPremultiplied,
387            ninepatch, layoutbounds);
388    hasException(env); // For the side effect of logging.
389    return obj;
390}
391
392jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, int bitmapCreateFlags,
393        jbyteArray ninepatch, int density)
394{
395    return createBitmap(env, bitmap, NULL, bitmapCreateFlags, ninepatch, NULL, density);
396}
397
398void GraphicsJNI::reinitBitmap(JNIEnv* env, jobject javaBitmap, SkBitmap* bitmap,
399        bool isPremultiplied)
400{
401    // The caller needs to have already set the alpha type properly, so the
402    // native SkBitmap stays in sync with the Java Bitmap.
403    assert_premultiplied(*bitmap, isPremultiplied);
404
405    env->CallVoidMethod(javaBitmap, gBitmap_reinitMethodID,
406            bitmap->width(), bitmap->height(), isPremultiplied);
407}
408
409int GraphicsJNI::getBitmapAllocationByteCount(JNIEnv* env, jobject javaBitmap)
410{
411    return env->CallIntMethod(javaBitmap, gBitmap_getAllocationByteCountMethodID);
412}
413
414jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap)
415{
416    SkASSERT(bitmap != NULL);
417
418    jobject obj = env->NewObject(gBitmapRegionDecoder_class,
419            gBitmapRegionDecoder_constructorMethodID,
420            reinterpret_cast<jlong>(bitmap));
421    hasException(env); // For the side effect of logging.
422    return obj;
423}
424
425jobject GraphicsJNI::createRegion(JNIEnv* env, SkRegion* region)
426{
427    SkASSERT(region != NULL);
428    jobject obj = env->NewObject(gRegion_class, gRegion_constructorMethodID,
429                                 reinterpret_cast<jlong>(region), 0);
430    hasException(env); // For the side effect of logging.
431    return obj;
432}
433
434static JNIEnv* vm2env(JavaVM* vm)
435{
436    JNIEnv* env = NULL;
437    if (vm->GetEnv((void**)&env, JNI_VERSION_1_4) != JNI_OK || NULL == env)
438    {
439        SkDebugf("------- [%p] vm->GetEnv() failed\n", vm);
440        sk_throw();
441    }
442    return env;
443}
444
445///////////////////////////////////////////////////////////////////////////////
446
447AndroidPixelRef::AndroidPixelRef(JNIEnv* env, const SkImageInfo& info, void* storage,
448        size_t rowBytes, jbyteArray storageObj, SkColorTable* ctable) :
449        SkMallocPixelRef(info, storage, rowBytes, ctable, (storageObj == NULL)),
450        fWrappedPixelRef(NULL) {
451    SkASSERT(storage);
452    SkASSERT(env);
453
454    if (env->GetJavaVM(&fVM) != JNI_OK) {
455        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
456        sk_throw();
457    }
458    fStorageObj = storageObj;
459    fHasGlobalRef = false;
460    fGlobalRefCnt = 0;
461
462    // If storageObj is NULL, the memory was NOT allocated on the Java heap
463    fOnJavaHeap = (storageObj != NULL);
464
465}
466
467AndroidPixelRef::AndroidPixelRef(AndroidPixelRef& wrappedPixelRef, const SkImageInfo& info,
468        size_t rowBytes, SkColorTable* ctable) :
469        SkMallocPixelRef(info, wrappedPixelRef.getAddr(), rowBytes, ctable, false),
470        fWrappedPixelRef(wrappedPixelRef.fWrappedPixelRef ?
471                wrappedPixelRef.fWrappedPixelRef : &wrappedPixelRef)
472{
473    SkASSERT(fWrappedPixelRef);
474    SkSafeRef(fWrappedPixelRef);
475
476    // don't need to initialize these, as all the relevant logic delegates to the wrapped ref
477    fStorageObj = NULL;
478    fHasGlobalRef = false;
479    fGlobalRefCnt = 0;
480    fOnJavaHeap = false;
481}
482
483AndroidPixelRef::~AndroidPixelRef() {
484    if (fWrappedPixelRef) {
485        SkSafeUnref(fWrappedPixelRef);
486    } else if (fOnJavaHeap) {
487        JNIEnv* env = vm2env(fVM);
488
489        if (fStorageObj && fHasGlobalRef) {
490            env->DeleteGlobalRef(fStorageObj);
491        }
492        fStorageObj = NULL;
493    }
494}
495jbyteArray AndroidPixelRef::getStorageObj() {
496    if (fWrappedPixelRef) {
497        return fWrappedPixelRef->fStorageObj;
498    }
499    return fStorageObj;
500}
501
502void AndroidPixelRef::setLocalJNIRef(jbyteArray arr) {
503    if (fWrappedPixelRef) {
504        // delegate java obj management to the wrapped ref
505        fWrappedPixelRef->setLocalJNIRef(arr);
506    } else if (!fHasGlobalRef) {
507        fStorageObj = arr;
508    }
509}
510
511void AndroidPixelRef::globalRef(void* localref) {
512    if (fWrappedPixelRef) {
513        // delegate java obj management to the wrapped ref
514        fWrappedPixelRef->globalRef(localref);
515
516        // Note: we only ref and unref the wrapped AndroidPixelRef so that
517        // bitmap->pixelRef()->globalRef() and globalUnref() can be used in a pair, even if
518        // the bitmap has its underlying AndroidPixelRef swapped out/wrapped
519        return;
520    }
521    if (fOnJavaHeap && sk_atomic_inc(&fGlobalRefCnt) == 0) {
522        JNIEnv *env = vm2env(fVM);
523
524        // If JNI ref was passed, it is always used
525        if (localref) fStorageObj = (jbyteArray) localref;
526
527        if (fStorageObj == NULL) {
528            SkDebugf("No valid local ref to create a JNI global ref\n");
529            sk_throw();
530        }
531        if (fHasGlobalRef) {
532            // This should never happen
533            SkDebugf("Already holding a JNI global ref");
534            sk_throw();
535        }
536
537        fStorageObj = (jbyteArray) env->NewGlobalRef(fStorageObj);
538        // TODO: Check for failure here
539        fHasGlobalRef = true;
540    }
541    ref();
542}
543
544void AndroidPixelRef::globalUnref() {
545    if (fWrappedPixelRef) {
546        // delegate java obj management to the wrapped ref
547        fWrappedPixelRef->globalUnref();
548        return;
549    }
550    if (fOnJavaHeap && sk_atomic_dec(&fGlobalRefCnt) == 1) {
551        JNIEnv *env = vm2env(fVM);
552        if (!fHasGlobalRef) {
553            SkDebugf("We don't have a global ref!");
554            sk_throw();
555        }
556        env->DeleteGlobalRef(fStorageObj);
557        fStorageObj = NULL;
558        fHasGlobalRef = false;
559    }
560    unref();
561}
562
563///////////////////////////////////////////////////////////////////////////////
564
565jbyteArray GraphicsJNI::allocateJavaPixelRef(JNIEnv* env, SkBitmap* bitmap,
566                                             SkColorTable* ctable) {
567    const SkImageInfo& info = bitmap->info();
568    if (info.fColorType == kUnknown_SkColorType) {
569        doThrowIAE(env, "unknown bitmap configuration");
570        return NULL;
571    }
572
573    const size_t size = bitmap->getSize();
574    jbyteArray arrayObj = (jbyteArray) env->CallObjectMethod(gVMRuntime,
575                                                             gVMRuntime_newNonMovableArray,
576                                                             gByte_class, size);
577    if (env->ExceptionCheck() != 0) {
578        return NULL;
579    }
580    SkASSERT(arrayObj);
581    jbyte* addr = (jbyte*) env->CallLongMethod(gVMRuntime, gVMRuntime_addressOf, arrayObj);
582    if (env->ExceptionCheck() != 0) {
583        return NULL;
584    }
585    SkASSERT(addr);
586    SkPixelRef* pr = new AndroidPixelRef(env, info, (void*) addr,
587            bitmap->rowBytes(), arrayObj, ctable);
588    bitmap->setPixelRef(pr)->unref();
589    // since we're already allocated, we lockPixels right away
590    // HeapAllocator behaves this way too
591    bitmap->lockPixels();
592
593    return arrayObj;
594}
595
596///////////////////////////////////////////////////////////////////////////////
597
598JavaPixelAllocator::JavaPixelAllocator(JNIEnv* env)
599    : fStorageObj(NULL),
600      fAllocCount(0) {
601    if (env->GetJavaVM(&fVM) != JNI_OK) {
602        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
603        sk_throw();
604    }
605}
606
607bool JavaPixelAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
608    JNIEnv* env = vm2env(fVM);
609
610    fStorageObj = GraphicsJNI::allocateJavaPixelRef(env, bitmap, ctable);
611    fAllocCount += 1;
612    return fStorageObj != NULL;
613}
614
615////////////////////////////////////////////////////////////////////////////////
616
617JavaHeapBitmapRef::JavaHeapBitmapRef(JNIEnv* env, SkBitmap* nativeBitmap, jbyteArray buffer) {
618    fEnv = env;
619    fNativeBitmap = nativeBitmap;
620    fBuffer = buffer;
621
622    // If the buffer is NULL, the backing memory wasn't allocated on the Java heap
623    if (fBuffer) {
624        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(fBuffer);
625    }
626}
627
628JavaHeapBitmapRef::~JavaHeapBitmapRef() {
629    if (fBuffer) {
630        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(NULL);
631    }
632}
633
634////////////////////////////////////////////////////////////////////////////////
635
636static jclass make_globalref(JNIEnv* env, const char classname[])
637{
638    jclass c = env->FindClass(classname);
639    SkASSERT(c);
640    return (jclass) env->NewGlobalRef(c);
641}
642
643static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz,
644                                const char fieldname[], const char type[])
645{
646    jfieldID id = env->GetFieldID(clazz, fieldname, type);
647    SkASSERT(id);
648    return id;
649}
650
651int register_android_graphics_Graphics(JNIEnv* env)
652{
653    jmethodID m;
654    jclass c;
655
656    gRect_class = make_globalref(env, "android/graphics/Rect");
657    gRect_leftFieldID = getFieldIDCheck(env, gRect_class, "left", "I");
658    gRect_topFieldID = getFieldIDCheck(env, gRect_class, "top", "I");
659    gRect_rightFieldID = getFieldIDCheck(env, gRect_class, "right", "I");
660    gRect_bottomFieldID = getFieldIDCheck(env, gRect_class, "bottom", "I");
661
662    gRectF_class = make_globalref(env, "android/graphics/RectF");
663    gRectF_leftFieldID = getFieldIDCheck(env, gRectF_class, "left", "F");
664    gRectF_topFieldID = getFieldIDCheck(env, gRectF_class, "top", "F");
665    gRectF_rightFieldID = getFieldIDCheck(env, gRectF_class, "right", "F");
666    gRectF_bottomFieldID = getFieldIDCheck(env, gRectF_class, "bottom", "F");
667
668    gPoint_class = make_globalref(env, "android/graphics/Point");
669    gPoint_xFieldID = getFieldIDCheck(env, gPoint_class, "x", "I");
670    gPoint_yFieldID = getFieldIDCheck(env, gPoint_class, "y", "I");
671
672    gPointF_class = make_globalref(env, "android/graphics/PointF");
673    gPointF_xFieldID = getFieldIDCheck(env, gPointF_class, "x", "F");
674    gPointF_yFieldID = getFieldIDCheck(env, gPointF_class, "y", "F");
675
676    gBitmap_class = make_globalref(env, "android/graphics/Bitmap");
677    gBitmap_nativeInstanceID = getFieldIDCheck(env, gBitmap_class, "mNativeBitmap", "J");
678    gBitmap_constructorMethodID = env->GetMethodID(gBitmap_class, "<init>", "(J[BIIIZZ[B[I)V");
679    gBitmap_reinitMethodID = env->GetMethodID(gBitmap_class, "reinit", "(IIZ)V");
680    gBitmap_getAllocationByteCountMethodID = env->GetMethodID(gBitmap_class, "getAllocationByteCount", "()I");
681    gBitmapRegionDecoder_class = make_globalref(env, "android/graphics/BitmapRegionDecoder");
682    gBitmapRegionDecoder_constructorMethodID = env->GetMethodID(gBitmapRegionDecoder_class, "<init>", "(J)V");
683
684    gBitmapConfig_class = make_globalref(env, "android/graphics/Bitmap$Config");
685    gBitmapConfig_nativeInstanceID = getFieldIDCheck(env, gBitmapConfig_class,
686                                                     "nativeInt", "I");
687
688    gCanvas_class = make_globalref(env, "android/graphics/Canvas");
689    gCanvas_nativeInstanceID = getFieldIDCheck(env, gCanvas_class, "mNativeCanvasWrapper", "J");
690
691    gPaint_class = make_globalref(env, "android/graphics/Paint");
692    gPaint_nativeInstanceID = getFieldIDCheck(env, gPaint_class, "mNativePaint", "J");
693    gPaint_nativeTypefaceID = getFieldIDCheck(env, gPaint_class, "mNativeTypeface", "J");
694
695    gPicture_class = make_globalref(env, "android/graphics/Picture");
696    gPicture_nativeInstanceID = getFieldIDCheck(env, gPicture_class, "mNativePicture", "J");
697
698    gRegion_class = make_globalref(env, "android/graphics/Region");
699    gRegion_nativeInstanceID = getFieldIDCheck(env, gRegion_class, "mNativeRegion", "J");
700    gRegion_constructorMethodID = env->GetMethodID(gRegion_class, "<init>",
701        "(JI)V");
702
703    c = env->FindClass("java/lang/Byte");
704    gByte_class = (jclass) env->NewGlobalRef(
705        env->GetStaticObjectField(c, env->GetStaticFieldID(c, "TYPE", "Ljava/lang/Class;")));
706
707    gVMRuntime_class = make_globalref(env, "dalvik/system/VMRuntime");
708    m = env->GetStaticMethodID(gVMRuntime_class, "getRuntime", "()Ldalvik/system/VMRuntime;");
709    gVMRuntime = env->NewGlobalRef(env->CallStaticObjectMethod(gVMRuntime_class, m));
710    gVMRuntime_newNonMovableArray = env->GetMethodID(gVMRuntime_class, "newNonMovableArray",
711                                                     "(Ljava/lang/Class;I)Ljava/lang/Object;");
712    gVMRuntime_addressOf = env->GetMethodID(gVMRuntime_class, "addressOf", "(Ljava/lang/Object;)J");
713
714    return 0;
715}
716