Graphics.cpp revision 2cb8c3c9e5d79dfba10d2f39792ad553d4fbc292 
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   gPaint_class;
170static jfieldID gPaint_nativeInstanceID;
171static jfieldID gPaint_nativeTypefaceID;
172
173static jclass   gPicture_class;
174static jfieldID gPicture_nativeInstanceID;
175
176static jclass   gRegion_class;
177static jfieldID gRegion_nativeInstanceID;
178static jmethodID gRegion_constructorMethodID;
179
180static jclass    gByte_class;
181static jobject   gVMRuntime;
182static jclass    gVMRuntime_class;
183static jmethodID gVMRuntime_newNonMovableArray;
184static jmethodID gVMRuntime_addressOf;
185
186///////////////////////////////////////////////////////////////////////////////
187
188void GraphicsJNI::get_jrect(JNIEnv* env, jobject obj, int* L, int* T, int* R, int* B)
189{
190    SkASSERT(env->IsInstanceOf(obj, gRect_class));
191
192    *L = env->GetIntField(obj, gRect_leftFieldID);
193    *T = env->GetIntField(obj, gRect_topFieldID);
194    *R = env->GetIntField(obj, gRect_rightFieldID);
195    *B = env->GetIntField(obj, gRect_bottomFieldID);
196}
197
198void GraphicsJNI::set_jrect(JNIEnv* env, jobject obj, int L, int T, int R, int B)
199{
200    SkASSERT(env->IsInstanceOf(obj, gRect_class));
201
202    env->SetIntField(obj, gRect_leftFieldID, L);
203    env->SetIntField(obj, gRect_topFieldID, T);
204    env->SetIntField(obj, gRect_rightFieldID, R);
205    env->SetIntField(obj, gRect_bottomFieldID, B);
206}
207
208SkIRect* GraphicsJNI::jrect_to_irect(JNIEnv* env, jobject obj, SkIRect* ir)
209{
210    SkASSERT(env->IsInstanceOf(obj, gRect_class));
211
212    ir->set(env->GetIntField(obj, gRect_leftFieldID),
213            env->GetIntField(obj, gRect_topFieldID),
214            env->GetIntField(obj, gRect_rightFieldID),
215            env->GetIntField(obj, gRect_bottomFieldID));
216    return ir;
217}
218
219void GraphicsJNI::irect_to_jrect(const SkIRect& ir, JNIEnv* env, jobject obj)
220{
221    SkASSERT(env->IsInstanceOf(obj, gRect_class));
222
223    env->SetIntField(obj, gRect_leftFieldID, ir.fLeft);
224    env->SetIntField(obj, gRect_topFieldID, ir.fTop);
225    env->SetIntField(obj, gRect_rightFieldID, ir.fRight);
226    env->SetIntField(obj, gRect_bottomFieldID, ir.fBottom);
227}
228
229SkRect* GraphicsJNI::jrectf_to_rect(JNIEnv* env, jobject obj, SkRect* r)
230{
231    SkASSERT(env->IsInstanceOf(obj, gRectF_class));
232
233    r->set(env->GetFloatField(obj, gRectF_leftFieldID),
234           env->GetFloatField(obj, gRectF_topFieldID),
235           env->GetFloatField(obj, gRectF_rightFieldID),
236           env->GetFloatField(obj, gRectF_bottomFieldID));
237    return r;
238}
239
240SkRect* GraphicsJNI::jrect_to_rect(JNIEnv* env, jobject obj, SkRect* r)
241{
242    SkASSERT(env->IsInstanceOf(obj, gRect_class));
243
244    r->set(SkIntToScalar(env->GetIntField(obj, gRect_leftFieldID)),
245           SkIntToScalar(env->GetIntField(obj, gRect_topFieldID)),
246           SkIntToScalar(env->GetIntField(obj, gRect_rightFieldID)),
247           SkIntToScalar(env->GetIntField(obj, gRect_bottomFieldID)));
248    return r;
249}
250
251void GraphicsJNI::rect_to_jrectf(const SkRect& r, JNIEnv* env, jobject obj)
252{
253    SkASSERT(env->IsInstanceOf(obj, gRectF_class));
254
255    env->SetFloatField(obj, gRectF_leftFieldID, SkScalarToFloat(r.fLeft));
256    env->SetFloatField(obj, gRectF_topFieldID, SkScalarToFloat(r.fTop));
257    env->SetFloatField(obj, gRectF_rightFieldID, SkScalarToFloat(r.fRight));
258    env->SetFloatField(obj, gRectF_bottomFieldID, SkScalarToFloat(r.fBottom));
259}
260
261SkIPoint* GraphicsJNI::jpoint_to_ipoint(JNIEnv* env, jobject obj, SkIPoint* point)
262{
263    SkASSERT(env->IsInstanceOf(obj, gPoint_class));
264
265    point->set(env->GetIntField(obj, gPoint_xFieldID),
266               env->GetIntField(obj, gPoint_yFieldID));
267    return point;
268}
269
270void GraphicsJNI::ipoint_to_jpoint(const SkIPoint& ir, JNIEnv* env, jobject obj)
271{
272    SkASSERT(env->IsInstanceOf(obj, gPoint_class));
273
274    env->SetIntField(obj, gPoint_xFieldID, ir.fX);
275    env->SetIntField(obj, gPoint_yFieldID, ir.fY);
276}
277
278SkPoint* GraphicsJNI::jpointf_to_point(JNIEnv* env, jobject obj, SkPoint* point)
279{
280    SkASSERT(env->IsInstanceOf(obj, gPointF_class));
281
282    point->set(env->GetIntField(obj, gPointF_xFieldID),
283               env->GetIntField(obj, gPointF_yFieldID));
284    return point;
285}
286
287void GraphicsJNI::point_to_jpointf(const SkPoint& r, JNIEnv* env, jobject obj)
288{
289    SkASSERT(env->IsInstanceOf(obj, gPointF_class));
290
291    env->SetFloatField(obj, gPointF_xFieldID, SkScalarToFloat(r.fX));
292    env->SetFloatField(obj, gPointF_yFieldID, SkScalarToFloat(r.fY));
293}
294
295// This enum must keep these int values, to match the int values
296// in the java Bitmap.Config enum.
297enum LegacyBitmapConfig {
298    kNo_LegacyBitmapConfig          = 0,
299    kA8_LegacyBitmapConfig          = 1,
300    kIndex8_LegacyBitmapConfig      = 2,
301    kRGB_565_LegacyBitmapConfig     = 3,
302    kARGB_4444_LegacyBitmapConfig   = 4,
303    kARGB_8888_LegacyBitmapConfig   = 5,
304
305    kLastEnum_LegacyBitmapConfig = kARGB_8888_LegacyBitmapConfig
306};
307
308jint GraphicsJNI::colorTypeToLegacyBitmapConfig(SkColorType colorType) {
309    switch (colorType) {
310        case kN32_SkColorType:
311            return kARGB_8888_LegacyBitmapConfig;
312        case kARGB_4444_SkColorType:
313            return kARGB_4444_LegacyBitmapConfig;
314        case kRGB_565_SkColorType:
315            return kRGB_565_LegacyBitmapConfig;
316        case kIndex_8_SkColorType:
317            return kIndex8_LegacyBitmapConfig;
318        case kAlpha_8_SkColorType:
319            return kA8_LegacyBitmapConfig;
320        case kUnknown_SkColorType:
321        default:
322            break;
323    }
324    return kNo_LegacyBitmapConfig;
325}
326
327SkColorType GraphicsJNI::legacyBitmapConfigToColorType(jint legacyConfig) {
328    const uint8_t gConfig2ColorType[] = {
329        kUnknown_SkColorType,
330        kAlpha_8_SkColorType,
331        kIndex_8_SkColorType,
332        kRGB_565_SkColorType,
333        kARGB_4444_SkColorType,
334        kN32_SkColorType
335    };
336
337    if (legacyConfig < 0 || legacyConfig > kLastEnum_LegacyBitmapConfig) {
338        legacyConfig = kNo_LegacyBitmapConfig;
339    }
340    return static_cast<SkColorType>(gConfig2ColorType[legacyConfig]);
341}
342
343SkBitmap* GraphicsJNI::getNativeBitmap(JNIEnv* env, jobject bitmap) {
344    SkASSERT(env);
345    SkASSERT(bitmap);
346    SkASSERT(env->IsInstanceOf(bitmap, gBitmap_class));
347    jlong bitmapHandle = env->GetLongField(bitmap, gBitmap_nativeInstanceID);
348    SkBitmap* b = reinterpret_cast<SkBitmap*>(bitmapHandle);
349    SkASSERT(b);
350    return b;
351}
352
353SkColorType GraphicsJNI::getNativeBitmapColorType(JNIEnv* env, jobject jconfig) {
354    SkASSERT(env);
355    if (NULL == jconfig) {
356        return kUnknown_SkColorType;
357    }
358    SkASSERT(env->IsInstanceOf(jconfig, gBitmapConfig_class));
359    int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID);
360    return legacyBitmapConfigToColorType(c);
361}
362
363SkCanvas* GraphicsJNI::getNativeCanvas(JNIEnv* env, jobject canvas) {
364    SkASSERT(env);
365    SkASSERT(canvas);
366    SkASSERT(env->IsInstanceOf(canvas, gCanvas_class));
367    jlong canvasHandle = env->GetLongField(canvas, gCanvas_nativeInstanceID);
368    SkCanvas* c = reinterpret_cast<android::Canvas*>(canvasHandle)->getSkCanvas();
369    SkASSERT(c);
370    return c;
371}
372
373SkPaint* GraphicsJNI::getNativePaint(JNIEnv* env, jobject paint) {
374    SkASSERT(env);
375    SkASSERT(paint);
376    SkASSERT(env->IsInstanceOf(paint, gPaint_class));
377    jlong paintHandle = env->GetLongField(paint, gPaint_nativeInstanceID);
378    SkPaint* p = reinterpret_cast<SkPaint*>(paintHandle);
379    SkASSERT(p);
380    return p;
381}
382
383android::TypefaceImpl* GraphicsJNI::getNativeTypeface(JNIEnv* env, jobject paint) {
384    SkASSERT(env);
385    SkASSERT(paint);
386    SkASSERT(env->IsInstanceOf(paint, gPaint_class));
387    jlong typefaceHandle = env->GetLongField(paint, gPaint_nativeTypefaceID);
388    android::TypefaceImpl* p = reinterpret_cast<android::TypefaceImpl*>(typefaceHandle);
389    return p;
390}
391
392SkRegion* GraphicsJNI::getNativeRegion(JNIEnv* env, jobject region)
393{
394    SkASSERT(env);
395    SkASSERT(region);
396    SkASSERT(env->IsInstanceOf(region, gRegion_class));
397    jlong regionHandle = env->GetLongField(region, gRegion_nativeInstanceID);
398    SkRegion* r = reinterpret_cast<SkRegion*>(regionHandle);
399    SkASSERT(r);
400    return r;
401}
402
403///////////////////////////////////////////////////////////////////////////////////////////
404
405// Assert that bitmap's SkAlphaType is consistent with isPremultiplied.
406static void assert_premultiplied(const SkBitmap& bitmap, bool isPremultiplied) {
407    // kOpaque_SkAlphaType and kIgnore_SkAlphaType mean that isPremultiplied is
408    // irrelevant. This just tests to ensure that the SkAlphaType is not
409    // opposite of isPremultiplied.
410    if (isPremultiplied) {
411        SkASSERT(bitmap.alphaType() != kUnpremul_SkAlphaType);
412    } else {
413        SkASSERT(bitmap.alphaType() != kPremul_SkAlphaType);
414    }
415}
416
417jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, jbyteArray buffer,
418        int bitmapCreateFlags, jbyteArray ninePatchChunk, jobject ninePatchInsets, int density)
419{
420    SkASSERT(bitmap);
421    SkASSERT(bitmap->pixelRef());
422    bool isMutable = bitmapCreateFlags & kBitmapCreateFlag_Mutable;
423    bool isPremultiplied = bitmapCreateFlags & kBitmapCreateFlag_Premultiplied;
424
425    // The caller needs to have already set the alpha type properly, so the
426    // native SkBitmap stays in sync with the Java Bitmap.
427    assert_premultiplied(*bitmap, isPremultiplied);
428
429    jobject obj = env->NewObject(gBitmap_class, gBitmap_constructorMethodID,
430            reinterpret_cast<jlong>(bitmap), buffer,
431            bitmap->width(), bitmap->height(), density, isMutable, isPremultiplied,
432            ninePatchChunk, ninePatchInsets);
433    hasException(env); // For the side effect of logging.
434    return obj;
435}
436
437void GraphicsJNI::reinitBitmap(JNIEnv* env, jobject javaBitmap, SkBitmap* bitmap,
438        bool isPremultiplied)
439{
440    // The caller needs to have already set the alpha type properly, so the
441    // native SkBitmap stays in sync with the Java Bitmap.
442    assert_premultiplied(*bitmap, isPremultiplied);
443
444    env->CallVoidMethod(javaBitmap, gBitmap_reinitMethodID,
445            bitmap->width(), bitmap->height(), isPremultiplied);
446}
447
448int GraphicsJNI::getBitmapAllocationByteCount(JNIEnv* env, jobject javaBitmap)
449{
450    return env->CallIntMethod(javaBitmap, gBitmap_getAllocationByteCountMethodID);
451}
452
453jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap)
454{
455    SkASSERT(bitmap != NULL);
456
457    jobject obj = env->NewObject(gBitmapRegionDecoder_class,
458            gBitmapRegionDecoder_constructorMethodID,
459            reinterpret_cast<jlong>(bitmap));
460    hasException(env); // For the side effect of logging.
461    return obj;
462}
463
464jobject GraphicsJNI::createRegion(JNIEnv* env, SkRegion* region)
465{
466    SkASSERT(region != NULL);
467    jobject obj = env->NewObject(gRegion_class, gRegion_constructorMethodID,
468                                 reinterpret_cast<jlong>(region), 0);
469    hasException(env); // For the side effect of logging.
470    return obj;
471}
472
473static JNIEnv* vm2env(JavaVM* vm)
474{
475    JNIEnv* env = NULL;
476    if (vm->GetEnv((void**)&env, JNI_VERSION_1_4) != JNI_OK || NULL == env)
477    {
478        SkDebugf("------- [%p] vm->GetEnv() failed\n", vm);
479        sk_throw();
480    }
481    return env;
482}
483
484///////////////////////////////////////////////////////////////////////////////
485
486AndroidPixelRef::AndroidPixelRef(JNIEnv* env, const SkImageInfo& info, void* storage,
487        size_t rowBytes, jbyteArray storageObj, SkColorTable* ctable) :
488        SkMallocPixelRef(info, storage, rowBytes, ctable, (storageObj == NULL)),
489        fWrappedPixelRef(NULL) {
490    SkASSERT(storage);
491    SkASSERT(env);
492
493    if (env->GetJavaVM(&fVM) != JNI_OK) {
494        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
495        sk_throw();
496    }
497    fStorageObj = storageObj;
498    fHasGlobalRef = false;
499    fGlobalRefCnt = 0;
500
501    // If storageObj is NULL, the memory was NOT allocated on the Java heap
502    fOnJavaHeap = (storageObj != NULL);
503
504}
505
506AndroidPixelRef::AndroidPixelRef(AndroidPixelRef& wrappedPixelRef, const SkImageInfo& info,
507        size_t rowBytes, SkColorTable* ctable) :
508        SkMallocPixelRef(info, wrappedPixelRef.getAddr(), rowBytes, ctable, false),
509        fWrappedPixelRef(wrappedPixelRef.fWrappedPixelRef ?
510                wrappedPixelRef.fWrappedPixelRef : &wrappedPixelRef)
511{
512    SkASSERT(fWrappedPixelRef);
513    SkSafeRef(fWrappedPixelRef);
514
515    // don't need to initialize these, as all the relevant logic delegates to the wrapped ref
516    fStorageObj = NULL;
517    fHasGlobalRef = false;
518    fGlobalRefCnt = 0;
519    fOnJavaHeap = false;
520}
521
522AndroidPixelRef::~AndroidPixelRef() {
523    if (fWrappedPixelRef) {
524        SkSafeUnref(fWrappedPixelRef);
525    } else if (fOnJavaHeap) {
526        JNIEnv* env = vm2env(fVM);
527
528        if (fStorageObj && fHasGlobalRef) {
529            env->DeleteGlobalRef(fStorageObj);
530        }
531        fStorageObj = NULL;
532    }
533}
534jbyteArray AndroidPixelRef::getStorageObj() {
535    if (fWrappedPixelRef) {
536        return fWrappedPixelRef->fStorageObj;
537    }
538    return fStorageObj;
539}
540
541void AndroidPixelRef::setLocalJNIRef(jbyteArray arr) {
542    if (fWrappedPixelRef) {
543        // delegate java obj management to the wrapped ref
544        fWrappedPixelRef->setLocalJNIRef(arr);
545    } else if (!fHasGlobalRef) {
546        fStorageObj = arr;
547    }
548}
549
550void AndroidPixelRef::globalRef(void* localref) {
551    if (fWrappedPixelRef) {
552        // delegate java obj management to the wrapped ref
553        fWrappedPixelRef->globalRef(localref);
554
555        // Note: we only ref and unref the wrapped AndroidPixelRef so that
556        // bitmap->pixelRef()->globalRef() and globalUnref() can be used in a pair, even if
557        // the bitmap has its underlying AndroidPixelRef swapped out/wrapped
558        return;
559    }
560    if (fOnJavaHeap && sk_atomic_inc(&fGlobalRefCnt) == 0) {
561        JNIEnv *env = vm2env(fVM);
562
563        // If JNI ref was passed, it is always used
564        if (localref) fStorageObj = (jbyteArray) localref;
565
566        if (fStorageObj == NULL) {
567            SkDebugf("No valid local ref to create a JNI global ref\n");
568            sk_throw();
569        }
570        if (fHasGlobalRef) {
571            // This should never happen
572            SkDebugf("Already holding a JNI global ref");
573            sk_throw();
574        }
575
576        fStorageObj = (jbyteArray) env->NewGlobalRef(fStorageObj);
577        // TODO: Check for failure here
578        fHasGlobalRef = true;
579    }
580    ref();
581}
582
583void AndroidPixelRef::globalUnref() {
584    if (fWrappedPixelRef) {
585        // delegate java obj management to the wrapped ref
586        fWrappedPixelRef->globalUnref();
587        return;
588    }
589    if (fOnJavaHeap && sk_atomic_dec(&fGlobalRefCnt) == 1) {
590        JNIEnv *env = vm2env(fVM);
591        if (!fHasGlobalRef) {
592            SkDebugf("We don't have a global ref!");
593            sk_throw();
594        }
595        env->DeleteGlobalRef(fStorageObj);
596        fStorageObj = NULL;
597        fHasGlobalRef = false;
598    }
599    unref();
600}
601
602///////////////////////////////////////////////////////////////////////////////
603
604jbyteArray GraphicsJNI::allocateJavaPixelRef(JNIEnv* env, SkBitmap* bitmap,
605                                             SkColorTable* ctable) {
606    const SkImageInfo& info = bitmap->info();
607    if (info.fColorType == kUnknown_SkColorType) {
608        doThrowIAE(env, "unknown bitmap configuration");
609        return NULL;
610    }
611
612    const size_t size = bitmap->getSize();
613    jbyteArray arrayObj = (jbyteArray) env->CallObjectMethod(gVMRuntime,
614                                                             gVMRuntime_newNonMovableArray,
615                                                             gByte_class, size);
616    if (env->ExceptionCheck() != 0) {
617        return NULL;
618    }
619    SkASSERT(arrayObj);
620    jbyte* addr = (jbyte*) env->CallLongMethod(gVMRuntime, gVMRuntime_addressOf, arrayObj);
621    if (env->ExceptionCheck() != 0) {
622        return NULL;
623    }
624    SkASSERT(addr);
625    SkPixelRef* pr = new AndroidPixelRef(env, info, (void*) addr,
626            bitmap->rowBytes(), arrayObj, ctable);
627    bitmap->setPixelRef(pr)->unref();
628    // since we're already allocated, we lockPixels right away
629    // HeapAllocator behaves this way too
630    bitmap->lockPixels();
631
632    return arrayObj;
633}
634
635///////////////////////////////////////////////////////////////////////////////
636
637JavaPixelAllocator::JavaPixelAllocator(JNIEnv* env)
638    : fStorageObj(NULL),
639      fAllocCount(0) {
640    if (env->GetJavaVM(&fVM) != JNI_OK) {
641        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
642        sk_throw();
643    }
644}
645
646bool JavaPixelAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
647    JNIEnv* env = vm2env(fVM);
648
649    fStorageObj = GraphicsJNI::allocateJavaPixelRef(env, bitmap, ctable);
650    fAllocCount += 1;
651    return fStorageObj != NULL;
652}
653
654////////////////////////////////////////////////////////////////////////////////
655
656JavaHeapBitmapRef::JavaHeapBitmapRef(JNIEnv* env, SkBitmap* nativeBitmap, jbyteArray buffer) {
657    fEnv = env;
658    fNativeBitmap = nativeBitmap;
659    fBuffer = buffer;
660
661    // If the buffer is NULL, the backing memory wasn't allocated on the Java heap
662    if (fBuffer) {
663        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(fBuffer);
664    }
665}
666
667JavaHeapBitmapRef::~JavaHeapBitmapRef() {
668    if (fBuffer) {
669        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(NULL);
670    }
671}
672
673////////////////////////////////////////////////////////////////////////////////
674
675static jclass make_globalref(JNIEnv* env, const char classname[])
676{
677    jclass c = env->FindClass(classname);
678    SkASSERT(c);
679    return (jclass) env->NewGlobalRef(c);
680}
681
682static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz,
683                                const char fieldname[], const char type[])
684{
685    jfieldID id = env->GetFieldID(clazz, fieldname, type);
686    SkASSERT(id);
687    return id;
688}
689
690int register_android_graphics_Graphics(JNIEnv* env)
691{
692    jmethodID m;
693    jclass c;
694
695    gRect_class = make_globalref(env, "android/graphics/Rect");
696    gRect_leftFieldID = getFieldIDCheck(env, gRect_class, "left", "I");
697    gRect_topFieldID = getFieldIDCheck(env, gRect_class, "top", "I");
698    gRect_rightFieldID = getFieldIDCheck(env, gRect_class, "right", "I");
699    gRect_bottomFieldID = getFieldIDCheck(env, gRect_class, "bottom", "I");
700
701    gRectF_class = make_globalref(env, "android/graphics/RectF");
702    gRectF_leftFieldID = getFieldIDCheck(env, gRectF_class, "left", "F");
703    gRectF_topFieldID = getFieldIDCheck(env, gRectF_class, "top", "F");
704    gRectF_rightFieldID = getFieldIDCheck(env, gRectF_class, "right", "F");
705    gRectF_bottomFieldID = getFieldIDCheck(env, gRectF_class, "bottom", "F");
706
707    gPoint_class = make_globalref(env, "android/graphics/Point");
708    gPoint_xFieldID = getFieldIDCheck(env, gPoint_class, "x", "I");
709    gPoint_yFieldID = getFieldIDCheck(env, gPoint_class, "y", "I");
710
711    gPointF_class = make_globalref(env, "android/graphics/PointF");
712    gPointF_xFieldID = getFieldIDCheck(env, gPointF_class, "x", "F");
713    gPointF_yFieldID = getFieldIDCheck(env, gPointF_class, "y", "F");
714
715    gBitmap_class = make_globalref(env, "android/graphics/Bitmap");
716    gBitmap_nativeInstanceID = getFieldIDCheck(env, gBitmap_class, "mNativeBitmap", "J");
717    gBitmap_constructorMethodID = env->GetMethodID(gBitmap_class, "<init>", "(J[BIIIZZ[BLandroid/graphics/NinePatch$InsetStruct;)V");
718    gBitmap_reinitMethodID = env->GetMethodID(gBitmap_class, "reinit", "(IIZ)V");
719    gBitmap_getAllocationByteCountMethodID = env->GetMethodID(gBitmap_class, "getAllocationByteCount", "()I");
720    gBitmapRegionDecoder_class = make_globalref(env, "android/graphics/BitmapRegionDecoder");
721    gBitmapRegionDecoder_constructorMethodID = env->GetMethodID(gBitmapRegionDecoder_class, "<init>", "(J)V");
722
723    gBitmapConfig_class = make_globalref(env, "android/graphics/Bitmap$Config");
724    gBitmapConfig_nativeInstanceID = getFieldIDCheck(env, gBitmapConfig_class,
725                                                     "nativeInt", "I");
726
727    gCanvas_class = make_globalref(env, "android/graphics/Canvas");
728    gCanvas_nativeInstanceID = getFieldIDCheck(env, gCanvas_class, "mNativeCanvasWrapper", "J");
729
730    gPaint_class = make_globalref(env, "android/graphics/Paint");
731    gPaint_nativeInstanceID = getFieldIDCheck(env, gPaint_class, "mNativePaint", "J");
732    gPaint_nativeTypefaceID = getFieldIDCheck(env, gPaint_class, "mNativeTypeface", "J");
733
734    gPicture_class = make_globalref(env, "android/graphics/Picture");
735    gPicture_nativeInstanceID = getFieldIDCheck(env, gPicture_class, "mNativePicture", "J");
736
737    gRegion_class = make_globalref(env, "android/graphics/Region");
738    gRegion_nativeInstanceID = getFieldIDCheck(env, gRegion_class, "mNativeRegion", "J");
739    gRegion_constructorMethodID = env->GetMethodID(gRegion_class, "<init>",
740        "(JI)V");
741
742    c = env->FindClass("java/lang/Byte");
743    gByte_class = (jclass) env->NewGlobalRef(
744        env->GetStaticObjectField(c, env->GetStaticFieldID(c, "TYPE", "Ljava/lang/Class;")));
745
746    gVMRuntime_class = make_globalref(env, "dalvik/system/VMRuntime");
747    m = env->GetStaticMethodID(gVMRuntime_class, "getRuntime", "()Ldalvik/system/VMRuntime;");
748    gVMRuntime = env->NewGlobalRef(env->CallStaticObjectMethod(gVMRuntime_class, m));
749    gVMRuntime_newNonMovableArray = env->GetMethodID(gVMRuntime_class, "newNonMovableArray",
750                                                     "(Ljava/lang/Class;I)Ljava/lang/Object;");
751    gVMRuntime_addressOf = env->GetMethodID(gVMRuntime_class, "addressOf", "(Ljava/lang/Object;)J");
752
753    return 0;
754}
755