Graphics.cpp revision de92f4c72be8537d2efff6024390b9ab706286e1 
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    if (!canvasHandle) {
369        return NULL;
370    }
371    SkCanvas* c = reinterpret_cast<android::Canvas*>(canvasHandle)->getSkCanvas();
372    SkASSERT(c);
373    return c;
374}
375
376android::Paint* GraphicsJNI::getNativePaint(JNIEnv* env, jobject paint) {
377    SkASSERT(env);
378    SkASSERT(paint);
379    SkASSERT(env->IsInstanceOf(paint, gPaint_class));
380    jlong paintHandle = env->GetLongField(paint, gPaint_nativeInstanceID);
381    android::Paint* p = reinterpret_cast<android::Paint*>(paintHandle);
382    SkASSERT(p);
383    return p;
384}
385
386android::TypefaceImpl* GraphicsJNI::getNativeTypeface(JNIEnv* env, jobject paint) {
387    SkASSERT(env);
388    SkASSERT(paint);
389    SkASSERT(env->IsInstanceOf(paint, gPaint_class));
390    jlong typefaceHandle = env->GetLongField(paint, gPaint_nativeTypefaceID);
391    android::TypefaceImpl* p = reinterpret_cast<android::TypefaceImpl*>(typefaceHandle);
392    return p;
393}
394
395SkRegion* GraphicsJNI::getNativeRegion(JNIEnv* env, jobject region)
396{
397    SkASSERT(env);
398    SkASSERT(region);
399    SkASSERT(env->IsInstanceOf(region, gRegion_class));
400    jlong regionHandle = env->GetLongField(region, gRegion_nativeInstanceID);
401    SkRegion* r = reinterpret_cast<SkRegion*>(regionHandle);
402    SkASSERT(r);
403    return r;
404}
405
406///////////////////////////////////////////////////////////////////////////////////////////
407
408// Assert that bitmap's SkAlphaType is consistent with isPremultiplied.
409static void assert_premultiplied(const SkBitmap& bitmap, bool isPremultiplied) {
410    // kOpaque_SkAlphaType and kIgnore_SkAlphaType mean that isPremultiplied is
411    // irrelevant. This just tests to ensure that the SkAlphaType is not
412    // opposite of isPremultiplied.
413    if (isPremultiplied) {
414        SkASSERT(bitmap.alphaType() != kUnpremul_SkAlphaType);
415    } else {
416        SkASSERT(bitmap.alphaType() != kPremul_SkAlphaType);
417    }
418}
419
420jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, jbyteArray buffer,
421        int bitmapCreateFlags, jbyteArray ninePatchChunk, jobject ninePatchInsets, int density)
422{
423    SkASSERT(bitmap);
424    SkASSERT(bitmap->pixelRef());
425    SkASSERT(!env->ExceptionCheck());
426    bool isMutable = bitmapCreateFlags & kBitmapCreateFlag_Mutable;
427    bool isPremultiplied = bitmapCreateFlags & kBitmapCreateFlag_Premultiplied;
428
429    // The caller needs to have already set the alpha type properly, so the
430    // native SkBitmap stays in sync with the Java Bitmap.
431    assert_premultiplied(*bitmap, isPremultiplied);
432
433    jobject obj = env->NewObject(gBitmap_class, gBitmap_constructorMethodID,
434            reinterpret_cast<jlong>(bitmap), buffer,
435            bitmap->width(), bitmap->height(), density, isMutable, isPremultiplied,
436            ninePatchChunk, ninePatchInsets);
437    hasException(env); // For the side effect of logging.
438    return obj;
439}
440
441void GraphicsJNI::reinitBitmap(JNIEnv* env, jobject javaBitmap, SkBitmap* bitmap,
442        bool isPremultiplied)
443{
444    // The caller needs to have already set the alpha type properly, so the
445    // native SkBitmap stays in sync with the Java Bitmap.
446    assert_premultiplied(*bitmap, isPremultiplied);
447
448    env->CallVoidMethod(javaBitmap, gBitmap_reinitMethodID,
449            bitmap->width(), bitmap->height(), isPremultiplied);
450}
451
452int GraphicsJNI::getBitmapAllocationByteCount(JNIEnv* env, jobject javaBitmap)
453{
454    return env->CallIntMethod(javaBitmap, gBitmap_getAllocationByteCountMethodID);
455}
456
457jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap)
458{
459    SkASSERT(bitmap != NULL);
460
461    jobject obj = env->NewObject(gBitmapRegionDecoder_class,
462            gBitmapRegionDecoder_constructorMethodID,
463            reinterpret_cast<jlong>(bitmap));
464    hasException(env); // For the side effect of logging.
465    return obj;
466}
467
468jobject GraphicsJNI::createRegion(JNIEnv* env, SkRegion* region)
469{
470    SkASSERT(region != NULL);
471    jobject obj = env->NewObject(gRegion_class, gRegion_constructorMethodID,
472                                 reinterpret_cast<jlong>(region), 0);
473    hasException(env); // For the side effect of logging.
474    return obj;
475}
476
477static JNIEnv* vm2env(JavaVM* vm)
478{
479    JNIEnv* env = NULL;
480    if (vm->GetEnv((void**)&env, JNI_VERSION_1_4) != JNI_OK || NULL == env)
481    {
482        SkDebugf("------- [%p] vm->GetEnv() failed\n", vm);
483        sk_throw();
484    }
485    return env;
486}
487
488///////////////////////////////////////////////////////////////////////////////
489
490AndroidPixelRef::AndroidPixelRef(JNIEnv* env, const SkImageInfo& info, void* storage,
491        size_t rowBytes, jbyteArray storageObj, SkColorTable* ctable) :
492        SkMallocPixelRef(info, storage, rowBytes, ctable, (storageObj == NULL)),
493        fWrappedPixelRef(NULL) {
494    SkASSERT(storage);
495    SkASSERT(env);
496
497    if (env->GetJavaVM(&fVM) != JNI_OK) {
498        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
499        sk_throw();
500    }
501    fStorageObj = storageObj;
502    fHasGlobalRef = false;
503    fGlobalRefCnt = 0;
504
505    // If storageObj is NULL, the memory was NOT allocated on the Java heap
506    fOnJavaHeap = (storageObj != NULL);
507
508}
509
510AndroidPixelRef::AndroidPixelRef(AndroidPixelRef& wrappedPixelRef, const SkImageInfo& info,
511        size_t rowBytes, SkColorTable* ctable) :
512        SkMallocPixelRef(info, wrappedPixelRef.getAddr(), rowBytes, ctable, false),
513        fWrappedPixelRef(wrappedPixelRef.fWrappedPixelRef ?
514                wrappedPixelRef.fWrappedPixelRef : &wrappedPixelRef)
515{
516    SkASSERT(fWrappedPixelRef);
517    SkSafeRef(fWrappedPixelRef);
518
519    // don't need to initialize these, as all the relevant logic delegates to the wrapped ref
520    fStorageObj = NULL;
521    fHasGlobalRef = false;
522    fGlobalRefCnt = 0;
523    fOnJavaHeap = false;
524}
525
526AndroidPixelRef::~AndroidPixelRef() {
527    if (fWrappedPixelRef) {
528        SkSafeUnref(fWrappedPixelRef);
529    } else if (fOnJavaHeap) {
530        JNIEnv* env = vm2env(fVM);
531
532        if (fStorageObj && fHasGlobalRef) {
533            env->DeleteGlobalRef(fStorageObj);
534        }
535        fStorageObj = NULL;
536    }
537}
538jbyteArray AndroidPixelRef::getStorageObj() {
539    if (fWrappedPixelRef) {
540        return fWrappedPixelRef->fStorageObj;
541    }
542    return fStorageObj;
543}
544
545void AndroidPixelRef::setLocalJNIRef(jbyteArray arr) {
546    if (fWrappedPixelRef) {
547        // delegate java obj management to the wrapped ref
548        fWrappedPixelRef->setLocalJNIRef(arr);
549    } else if (!fHasGlobalRef) {
550        fStorageObj = arr;
551    }
552}
553
554void AndroidPixelRef::globalRef(void* localref) {
555    if (fWrappedPixelRef) {
556        // delegate java obj management to the wrapped ref
557        fWrappedPixelRef->globalRef(localref);
558
559        // Note: we only ref and unref the wrapped AndroidPixelRef so that
560        // bitmap->pixelRef()->globalRef() and globalUnref() can be used in a pair, even if
561        // the bitmap has its underlying AndroidPixelRef swapped out/wrapped
562        return;
563    }
564    if (fOnJavaHeap && sk_atomic_inc(&fGlobalRefCnt) == 0) {
565        JNIEnv *env = vm2env(fVM);
566
567        // If JNI ref was passed, it is always used
568        if (localref) fStorageObj = (jbyteArray) localref;
569
570        if (fStorageObj == NULL) {
571            SkDebugf("No valid local ref to create a JNI global ref\n");
572            sk_throw();
573        }
574        if (fHasGlobalRef) {
575            // This should never happen
576            SkDebugf("Already holding a JNI global ref");
577            sk_throw();
578        }
579
580        fStorageObj = (jbyteArray) env->NewGlobalRef(fStorageObj);
581        // TODO: Check for failure here
582        fHasGlobalRef = true;
583    }
584    ref();
585}
586
587void AndroidPixelRef::globalUnref() {
588    if (fWrappedPixelRef) {
589        // delegate java obj management to the wrapped ref
590        fWrappedPixelRef->globalUnref();
591        return;
592    }
593    if (fOnJavaHeap && sk_atomic_dec(&fGlobalRefCnt) == 1) {
594        JNIEnv *env = vm2env(fVM);
595        if (!fHasGlobalRef) {
596            SkDebugf("We don't have a global ref!");
597            sk_throw();
598        }
599        env->DeleteGlobalRef(fStorageObj);
600        fStorageObj = NULL;
601        fHasGlobalRef = false;
602    }
603    unref();
604}
605
606///////////////////////////////////////////////////////////////////////////////
607
608jbyteArray GraphicsJNI::allocateJavaPixelRef(JNIEnv* env, SkBitmap* bitmap,
609                                             SkColorTable* ctable) {
610    const SkImageInfo& info = bitmap->info();
611    if (info.fColorType == kUnknown_SkColorType) {
612        doThrowIAE(env, "unknown bitmap configuration");
613        return NULL;
614    }
615
616    const size_t size = bitmap->getSize();
617    jbyteArray arrayObj = (jbyteArray) env->CallObjectMethod(gVMRuntime,
618                                                             gVMRuntime_newNonMovableArray,
619                                                             gByte_class, size);
620    if (env->ExceptionCheck() != 0) {
621        return NULL;
622    }
623    SkASSERT(arrayObj);
624    jbyte* addr = (jbyte*) env->CallLongMethod(gVMRuntime, gVMRuntime_addressOf, arrayObj);
625    if (env->ExceptionCheck() != 0) {
626        return NULL;
627    }
628    SkASSERT(addr);
629    SkPixelRef* pr = new AndroidPixelRef(env, info, (void*) addr,
630            bitmap->rowBytes(), arrayObj, ctable);
631    bitmap->setPixelRef(pr)->unref();
632    // since we're already allocated, we lockPixels right away
633    // HeapAllocator behaves this way too
634    bitmap->lockPixels();
635
636    return arrayObj;
637}
638
639///////////////////////////////////////////////////////////////////////////////
640
641JavaPixelAllocator::JavaPixelAllocator(JNIEnv* env)
642    : fStorageObj(NULL),
643      fAllocCount(0) {
644    if (env->GetJavaVM(&fVM) != JNI_OK) {
645        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
646        sk_throw();
647    }
648}
649
650bool JavaPixelAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
651    JNIEnv* env = vm2env(fVM);
652
653    fStorageObj = GraphicsJNI::allocateJavaPixelRef(env, bitmap, ctable);
654    fAllocCount += 1;
655    return fStorageObj != NULL;
656}
657
658////////////////////////////////////////////////////////////////////////////////
659
660JavaHeapBitmapRef::JavaHeapBitmapRef(JNIEnv* env, SkBitmap* nativeBitmap, jbyteArray buffer) {
661    fEnv = env;
662    fNativeBitmap = nativeBitmap;
663    fBuffer = buffer;
664
665    // If the buffer is NULL, the backing memory wasn't allocated on the Java heap
666    if (fBuffer) {
667        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(fBuffer);
668    }
669}
670
671JavaHeapBitmapRef::~JavaHeapBitmapRef() {
672    if (fBuffer) {
673        ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(NULL);
674    }
675}
676
677////////////////////////////////////////////////////////////////////////////////
678
679static jclass make_globalref(JNIEnv* env, const char classname[])
680{
681    jclass c = env->FindClass(classname);
682    SkASSERT(c);
683    return (jclass) env->NewGlobalRef(c);
684}
685
686static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz,
687                                const char fieldname[], const char type[])
688{
689    jfieldID id = env->GetFieldID(clazz, fieldname, type);
690    SkASSERT(id);
691    return id;
692}
693
694int register_android_graphics_Graphics(JNIEnv* env)
695{
696    jmethodID m;
697    jclass c;
698
699    gRect_class = make_globalref(env, "android/graphics/Rect");
700    gRect_leftFieldID = getFieldIDCheck(env, gRect_class, "left", "I");
701    gRect_topFieldID = getFieldIDCheck(env, gRect_class, "top", "I");
702    gRect_rightFieldID = getFieldIDCheck(env, gRect_class, "right", "I");
703    gRect_bottomFieldID = getFieldIDCheck(env, gRect_class, "bottom", "I");
704
705    gRectF_class = make_globalref(env, "android/graphics/RectF");
706    gRectF_leftFieldID = getFieldIDCheck(env, gRectF_class, "left", "F");
707    gRectF_topFieldID = getFieldIDCheck(env, gRectF_class, "top", "F");
708    gRectF_rightFieldID = getFieldIDCheck(env, gRectF_class, "right", "F");
709    gRectF_bottomFieldID = getFieldIDCheck(env, gRectF_class, "bottom", "F");
710
711    gPoint_class = make_globalref(env, "android/graphics/Point");
712    gPoint_xFieldID = getFieldIDCheck(env, gPoint_class, "x", "I");
713    gPoint_yFieldID = getFieldIDCheck(env, gPoint_class, "y", "I");
714
715    gPointF_class = make_globalref(env, "android/graphics/PointF");
716    gPointF_xFieldID = getFieldIDCheck(env, gPointF_class, "x", "F");
717    gPointF_yFieldID = getFieldIDCheck(env, gPointF_class, "y", "F");
718
719    gBitmap_class = make_globalref(env, "android/graphics/Bitmap");
720    gBitmap_nativeInstanceID = getFieldIDCheck(env, gBitmap_class, "mNativeBitmap", "J");
721    gBitmap_constructorMethodID = env->GetMethodID(gBitmap_class, "<init>", "(J[BIIIZZ[BLandroid/graphics/NinePatch$InsetStruct;)V");
722    gBitmap_reinitMethodID = env->GetMethodID(gBitmap_class, "reinit", "(IIZ)V");
723    gBitmap_getAllocationByteCountMethodID = env->GetMethodID(gBitmap_class, "getAllocationByteCount", "()I");
724    gBitmapRegionDecoder_class = make_globalref(env, "android/graphics/BitmapRegionDecoder");
725    gBitmapRegionDecoder_constructorMethodID = env->GetMethodID(gBitmapRegionDecoder_class, "<init>", "(J)V");
726
727    gBitmapConfig_class = make_globalref(env, "android/graphics/Bitmap$Config");
728    gBitmapConfig_nativeInstanceID = getFieldIDCheck(env, gBitmapConfig_class,
729                                                     "nativeInt", "I");
730
731    gCanvas_class = make_globalref(env, "android/graphics/Canvas");
732    gCanvas_nativeInstanceID = getFieldIDCheck(env, gCanvas_class, "mNativeCanvasWrapper", "J");
733
734    gPaint_class = make_globalref(env, "android/graphics/Paint");
735    gPaint_nativeInstanceID = getFieldIDCheck(env, gPaint_class, "mNativePaint", "J");
736    gPaint_nativeTypefaceID = getFieldIDCheck(env, gPaint_class, "mNativeTypeface", "J");
737
738    gPicture_class = make_globalref(env, "android/graphics/Picture");
739    gPicture_nativeInstanceID = getFieldIDCheck(env, gPicture_class, "mNativePicture", "J");
740
741    gRegion_class = make_globalref(env, "android/graphics/Region");
742    gRegion_nativeInstanceID = getFieldIDCheck(env, gRegion_class, "mNativeRegion", "J");
743    gRegion_constructorMethodID = env->GetMethodID(gRegion_class, "<init>",
744        "(JI)V");
745
746    c = env->FindClass("java/lang/Byte");
747    gByte_class = (jclass) env->NewGlobalRef(
748        env->GetStaticObjectField(c, env->GetStaticFieldID(c, "TYPE", "Ljava/lang/Class;")));
749
750    gVMRuntime_class = make_globalref(env, "dalvik/system/VMRuntime");
751    m = env->GetStaticMethodID(gVMRuntime_class, "getRuntime", "()Ldalvik/system/VMRuntime;");
752    gVMRuntime = env->NewGlobalRef(env->CallStaticObjectMethod(gVMRuntime_class, m));
753    gVMRuntime_newNonMovableArray = env->GetMethodID(gVMRuntime_class, "newNonMovableArray",
754                                                     "(Ljava/lang/Class;I)Ljava/lang/Object;");
755    gVMRuntime_addressOf = env->GetMethodID(gVMRuntime_class, "addressOf", "(Ljava/lang/Object;)J");
756
757    return 0;
758}
759