Graphics.cpp revision a08d10fa7051668b629d561bb8411e34d28fdabf 
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
373android::Paint* 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    android::Paint* p = reinterpret_cast<android::Paint*>(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    SkASSERT(!env->ExceptionCheck());
423    bool isMutable = bitmapCreateFlags & kBitmapCreateFlag_Mutable;
424    bool isPremultiplied = bitmapCreateFlags & kBitmapCreateFlag_Premultiplied;
425
426    // The caller needs to have already set the alpha type properly, so the
427    // native SkBitmap stays in sync with the Java Bitmap.
428    assert_premultiplied(*bitmap, isPremultiplied);
429
430    jobject obj = env->NewObject(gBitmap_class, gBitmap_constructorMethodID,
431            reinterpret_cast<jlong>(bitmap), buffer,
432            bitmap->width(), bitmap->height(), density, isMutable, isPremultiplied,
433            ninePatchChunk, ninePatchInsets);
434    hasException(env); // For the side effect of logging.
435    return obj;
436}
437
438void GraphicsJNI::reinitBitmap(JNIEnv* env, jobject javaBitmap, SkBitmap* bitmap,
439        bool isPremultiplied)
440{
441    // The caller needs to have already set the alpha type properly, so the
442    // native SkBitmap stays in sync with the Java Bitmap.
443    assert_premultiplied(*bitmap, isPremultiplied);
444
445    env->CallVoidMethod(javaBitmap, gBitmap_reinitMethodID,
446            bitmap->width(), bitmap->height(), isPremultiplied);
447}
448
449int GraphicsJNI::getBitmapAllocationByteCount(JNIEnv* env, jobject javaBitmap)
450{
451    return env->CallIntMethod(javaBitmap, gBitmap_getAllocationByteCountMethodID);
452}
453
454jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap)
455{
456    SkASSERT(bitmap != NULL);
457
458    jobject obj = env->NewObject(gBitmapRegionDecoder_class,
459            gBitmapRegionDecoder_constructorMethodID,
460            reinterpret_cast<jlong>(bitmap));
461    hasException(env); // For the side effect of logging.
462    return obj;
463}
464
465jobject GraphicsJNI::createRegion(JNIEnv* env, SkRegion* region)
466{
467    SkASSERT(region != NULL);
468    jobject obj = env->NewObject(gRegion_class, gRegion_constructorMethodID,
469                                 reinterpret_cast<jlong>(region), 0);
470    hasException(env); // For the side effect of logging.
471    return obj;
472}
473
474static JNIEnv* vm2env(JavaVM* vm)
475{
476    JNIEnv* env = NULL;
477    if (vm->GetEnv((void**)&env, JNI_VERSION_1_4) != JNI_OK || NULL == env)
478    {
479        SkDebugf("------- [%p] vm->GetEnv() failed\n", vm);
480        sk_throw();
481    }
482    return env;
483}
484
485///////////////////////////////////////////////////////////////////////////////
486
487AndroidPixelRef::AndroidPixelRef(JNIEnv* env, const SkImageInfo& info, void* storage,
488        size_t rowBytes, jbyteArray storageObj, SkColorTable* ctable) :
489        SkMallocPixelRef(info, storage, rowBytes, ctable, (storageObj == NULL)),
490        fWrappedPixelRef(NULL) {
491    SkASSERT(storage);
492    SkASSERT(env);
493
494    if (env->GetJavaVM(&fVM) != JNI_OK) {
495        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
496        sk_throw();
497    }
498    fStorageObj = storageObj;
499    fHasGlobalRef = false;
500    fGlobalRefCnt = 0;
501
502    // If storageObj is NULL, the memory was NOT allocated on the Java heap
503    fOnJavaHeap = (storageObj != NULL);
504
505}
506
507AndroidPixelRef::AndroidPixelRef(AndroidPixelRef& wrappedPixelRef, const SkImageInfo& info,
508        size_t rowBytes, SkColorTable* ctable) :
509        SkMallocPixelRef(info, wrappedPixelRef.getAddr(), rowBytes, ctable, false),
510        fWrappedPixelRef(wrappedPixelRef.fWrappedPixelRef ?
511                wrappedPixelRef.fWrappedPixelRef : &wrappedPixelRef)
512{
513    SkASSERT(fWrappedPixelRef);
514    SkSafeRef(fWrappedPixelRef);
515
516    // don't need to initialize these, as all the relevant logic delegates to the wrapped ref
517    fStorageObj = NULL;
518    fHasGlobalRef = false;
519    fGlobalRefCnt = 0;
520    fOnJavaHeap = false;
521}
522
523AndroidPixelRef::~AndroidPixelRef() {
524    if (fWrappedPixelRef) {
525        SkSafeUnref(fWrappedPixelRef);
526    } else if (fOnJavaHeap) {
527        JNIEnv* env = vm2env(fVM);
528
529        if (fStorageObj && fHasGlobalRef) {
530            env->DeleteGlobalRef(fStorageObj);
531        }
532        fStorageObj = NULL;
533    }
534}
535jbyteArray AndroidPixelRef::getStorageObj() {
536    if (fWrappedPixelRef) {
537        return fWrappedPixelRef->fStorageObj;
538    }
539    return fStorageObj;
540}
541
542void AndroidPixelRef::setLocalJNIRef(jbyteArray arr) {
543    if (fWrappedPixelRef) {
544        // delegate java obj management to the wrapped ref
545        fWrappedPixelRef->setLocalJNIRef(arr);
546    } else if (!fHasGlobalRef) {
547        fStorageObj = arr;
548    }
549}
550
551void AndroidPixelRef::globalRef(void* localref) {
552    if (fWrappedPixelRef) {
553        // delegate java obj management to the wrapped ref
554        fWrappedPixelRef->globalRef(localref);
555
556        // Note: we only ref and unref the wrapped AndroidPixelRef so that
557        // bitmap->pixelRef()->globalRef() and globalUnref() can be used in a pair, even if
558        // the bitmap has its underlying AndroidPixelRef swapped out/wrapped
559        return;
560    }
561    if (fOnJavaHeap && sk_atomic_inc(&fGlobalRefCnt) == 0) {
562        JNIEnv *env = vm2env(fVM);
563
564        // If JNI ref was passed, it is always used
565        if (localref) fStorageObj = (jbyteArray) localref;
566
567        if (fStorageObj == NULL) {
568            SkDebugf("No valid local ref to create a JNI global ref\n");
569            sk_throw();
570        }
571        if (fHasGlobalRef) {
572            // This should never happen
573            SkDebugf("Already holding a JNI global ref");
574            sk_throw();
575        }
576
577        fStorageObj = (jbyteArray) env->NewGlobalRef(fStorageObj);
578        // TODO: Check for failure here
579        fHasGlobalRef = true;
580    }
581    ref();
582}
583
584void AndroidPixelRef::globalUnref() {
585    if (fWrappedPixelRef) {
586        // delegate java obj management to the wrapped ref
587        fWrappedPixelRef->globalUnref();
588        return;
589    }
590    if (fOnJavaHeap && sk_atomic_dec(&fGlobalRefCnt) == 1) {
591        JNIEnv *env = vm2env(fVM);
592        if (!fHasGlobalRef) {
593            SkDebugf("We don't have a global ref!");
594            sk_throw();
595        }
596        env->DeleteGlobalRef(fStorageObj);
597        fStorageObj = NULL;
598        fHasGlobalRef = false;
599    }
600    unref();
601}
602
603///////////////////////////////////////////////////////////////////////////////
604
605jbyteArray GraphicsJNI::allocateJavaPixelRef(JNIEnv* env, SkBitmap* bitmap,
606                                             SkColorTable* ctable) {
607    const SkImageInfo& info = bitmap->info();
608    if (info.fColorType == kUnknown_SkColorType) {
609        doThrowIAE(env, "unknown bitmap configuration");
610        return NULL;
611    }
612
613    const size_t size = bitmap->getSize();
614    jbyteArray arrayObj = (jbyteArray) env->CallObjectMethod(gVMRuntime,
615                                                             gVMRuntime_newNonMovableArray,
616                                                             gByte_class, size);
617    if (env->ExceptionCheck() != 0) {
618        return NULL;
619    }
620    SkASSERT(arrayObj);
621    jbyte* addr = (jbyte*) env->CallLongMethod(gVMRuntime, gVMRuntime_addressOf, arrayObj);
622    if (env->ExceptionCheck() != 0) {
623        return NULL;
624    }
625    SkASSERT(addr);
626    SkPixelRef* pr = new AndroidPixelRef(env, info, (void*) addr,
627            bitmap->rowBytes(), arrayObj, ctable);
628    bitmap->setPixelRef(pr)->unref();
629    // since we're already allocated, we lockPixels right away
630    // HeapAllocator behaves this way too
631    bitmap->lockPixels();
632
633    return arrayObj;
634}
635
636///////////////////////////////////////////////////////////////////////////////
637
638JavaPixelAllocator::JavaPixelAllocator(JNIEnv* env)
639    : fStorageObj(NULL),
640      fAllocCount(0) {
641    if (env->GetJavaVM(&fVM) != JNI_OK) {
642        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
643        sk_throw();
644    }
645}
646
647bool JavaPixelAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
648    JNIEnv* env = vm2env(fVM);
649
650    fStorageObj = GraphicsJNI::allocateJavaPixelRef(env, bitmap, ctable);
651    fAllocCount += 1;
652    return fStorageObj != NULL;
653}
654
655////////////////////////////////////////////////////////////////////////////////
656
657JavaHeapBitmapRef::JavaHeapBitmapRef(JNIEnv* env, SkBitmap* nativeBitmap, jbyteArray buffer) {
658    fEnv = env;
659    fNativeBitmap = nativeBitmap;
660    fBuffer = buffer;
661
662    // If the buffer is NULL, the backing memory wasn't allocated on the Java heap
663    if (fBuffer) {
664        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(fBuffer);
665    }
666}
667
668JavaHeapBitmapRef::~JavaHeapBitmapRef() {
669    if (fBuffer) {
670        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(NULL);
671    }
672}
673
674////////////////////////////////////////////////////////////////////////////////
675
676static jclass make_globalref(JNIEnv* env, const char classname[])
677{
678    jclass c = env->FindClass(classname);
679    SkASSERT(c);
680    return (jclass) env->NewGlobalRef(c);
681}
682
683static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz,
684                                const char fieldname[], const char type[])
685{
686    jfieldID id = env->GetFieldID(clazz, fieldname, type);
687    SkASSERT(id);
688    return id;
689}
690
691int register_android_graphics_Graphics(JNIEnv* env)
692{
693    jmethodID m;
694    jclass c;
695
696    gRect_class = make_globalref(env, "android/graphics/Rect");
697    gRect_leftFieldID = getFieldIDCheck(env, gRect_class, "left", "I");
698    gRect_topFieldID = getFieldIDCheck(env, gRect_class, "top", "I");
699    gRect_rightFieldID = getFieldIDCheck(env, gRect_class, "right", "I");
700    gRect_bottomFieldID = getFieldIDCheck(env, gRect_class, "bottom", "I");
701
702    gRectF_class = make_globalref(env, "android/graphics/RectF");
703    gRectF_leftFieldID = getFieldIDCheck(env, gRectF_class, "left", "F");
704    gRectF_topFieldID = getFieldIDCheck(env, gRectF_class, "top", "F");
705    gRectF_rightFieldID = getFieldIDCheck(env, gRectF_class, "right", "F");
706    gRectF_bottomFieldID = getFieldIDCheck(env, gRectF_class, "bottom", "F");
707
708    gPoint_class = make_globalref(env, "android/graphics/Point");
709    gPoint_xFieldID = getFieldIDCheck(env, gPoint_class, "x", "I");
710    gPoint_yFieldID = getFieldIDCheck(env, gPoint_class, "y", "I");
711
712    gPointF_class = make_globalref(env, "android/graphics/PointF");
713    gPointF_xFieldID = getFieldIDCheck(env, gPointF_class, "x", "F");
714    gPointF_yFieldID = getFieldIDCheck(env, gPointF_class, "y", "F");
715
716    gBitmap_class = make_globalref(env, "android/graphics/Bitmap");
717    gBitmap_nativeInstanceID = getFieldIDCheck(env, gBitmap_class, "mNativeBitmap", "J");
718    gBitmap_constructorMethodID = env->GetMethodID(gBitmap_class, "<init>", "(J[BIIIZZ[BLandroid/graphics/NinePatch$InsetStruct;)V");
719    gBitmap_reinitMethodID = env->GetMethodID(gBitmap_class, "reinit", "(IIZ)V");
720    gBitmap_getAllocationByteCountMethodID = env->GetMethodID(gBitmap_class, "getAllocationByteCount", "()I");
721    gBitmapRegionDecoder_class = make_globalref(env, "android/graphics/BitmapRegionDecoder");
722    gBitmapRegionDecoder_constructorMethodID = env->GetMethodID(gBitmapRegionDecoder_class, "<init>", "(J)V");
723
724    gBitmapConfig_class = make_globalref(env, "android/graphics/Bitmap$Config");
725    gBitmapConfig_nativeInstanceID = getFieldIDCheck(env, gBitmapConfig_class,
726                                                     "nativeInt", "I");
727
728    gCanvas_class = make_globalref(env, "android/graphics/Canvas");
729    gCanvas_nativeInstanceID = getFieldIDCheck(env, gCanvas_class, "mNativeCanvasWrapper", "J");
730
731    gPaint_class = make_globalref(env, "android/graphics/Paint");
732    gPaint_nativeInstanceID = getFieldIDCheck(env, gPaint_class, "mNativePaint", "J");
733    gPaint_nativeTypefaceID = getFieldIDCheck(env, gPaint_class, "mNativeTypeface", "J");
734
735    gPicture_class = make_globalref(env, "android/graphics/Picture");
736    gPicture_nativeInstanceID = getFieldIDCheck(env, gPicture_class, "mNativePicture", "J");
737
738    gRegion_class = make_globalref(env, "android/graphics/Region");
739    gRegion_nativeInstanceID = getFieldIDCheck(env, gRegion_class, "mNativeRegion", "J");
740    gRegion_constructorMethodID = env->GetMethodID(gRegion_class, "<init>",
741        "(JI)V");
742
743    c = env->FindClass("java/lang/Byte");
744    gByte_class = (jclass) env->NewGlobalRef(
745        env->GetStaticObjectField(c, env->GetStaticFieldID(c, "TYPE", "Ljava/lang/Class;")));
746
747    gVMRuntime_class = make_globalref(env, "dalvik/system/VMRuntime");
748    m = env->GetStaticMethodID(gVMRuntime_class, "getRuntime", "()Ldalvik/system/VMRuntime;");
749    gVMRuntime = env->NewGlobalRef(env->CallStaticObjectMethod(gVMRuntime_class, m));
750    gVMRuntime_newNonMovableArray = env->GetMethodID(gVMRuntime_class, "newNonMovableArray",
751                                                     "(Ljava/lang/Class;I)Ljava/lang/Object;");
752    gVMRuntime_addressOf = env->GetMethodID(gVMRuntime_class, "addressOf", "(Ljava/lang/Object;)J");
753
754    return 0;
755}
756