Graphics.cpp revision ed207b92747234eac88dd3664ecfb535e45d8ed1 
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 "SkRegion.h"
12#include <android_runtime/AndroidRuntime.h>
13
14#include <Caches.h>
15#include <TextureCache.h>
16
17void doThrowNPE(JNIEnv* env) {
18    jniThrowNullPointerException(env, NULL);
19}
20
21void doThrowAIOOBE(JNIEnv* env) {
22    jniThrowException(env, "java/lang/ArrayIndexOutOfBoundsException", NULL);
23}
24
25void doThrowRE(JNIEnv* env, const char* msg) {
26    jniThrowRuntimeException(env, msg);
27}
28
29void doThrowIAE(JNIEnv* env, const char* msg) {
30    jniThrowException(env, "java/lang/IllegalArgumentException", msg);
31}
32
33void doThrowISE(JNIEnv* env, const char* msg) {
34    jniThrowException(env, "java/lang/IllegalStateException", msg);
35}
36
37void doThrowOOME(JNIEnv* env, const char* msg) {
38    jniThrowException(env, "java/lang/OutOfMemoryError", msg);
39}
40
41void doThrowIOE(JNIEnv* env, const char* msg) {
42    jniThrowException(env, "java/io/IOException", msg);
43}
44
45bool GraphicsJNI::hasException(JNIEnv *env) {
46    if (env->ExceptionCheck() != 0) {
47        ALOGE("*** Uncaught exception returned from Java call!\n");
48        env->ExceptionDescribe();
49        return true;
50    }
51    return false;
52}
53
54///////////////////////////////////////////////////////////////////////////////
55
56AutoJavaFloatArray::AutoJavaFloatArray(JNIEnv* env, jfloatArray array,
57                                       int minLength, JNIAccess access)
58: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
59    SkASSERT(env);
60    if (array) {
61        fLen = env->GetArrayLength(array);
62        if (fLen < minLength) {
63            sk_throw();
64        }
65        fPtr = env->GetFloatArrayElements(array, NULL);
66    }
67    fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0;
68}
69
70AutoJavaFloatArray::~AutoJavaFloatArray() {
71    if (fPtr) {
72        fEnv->ReleaseFloatArrayElements(fArray, fPtr, fReleaseMode);
73    }
74}
75
76AutoJavaIntArray::AutoJavaIntArray(JNIEnv* env, jintArray array,
77                                       int minLength)
78: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
79    SkASSERT(env);
80    if (array) {
81        fLen = env->GetArrayLength(array);
82        if (fLen < minLength) {
83            sk_throw();
84        }
85        fPtr = env->GetIntArrayElements(array, NULL);
86    }
87}
88
89AutoJavaIntArray::~AutoJavaIntArray() {
90    if (fPtr) {
91        fEnv->ReleaseIntArrayElements(fArray, fPtr, 0);
92    }
93}
94
95AutoJavaShortArray::AutoJavaShortArray(JNIEnv* env, jshortArray array,
96                                       int minLength, JNIAccess access)
97: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
98    SkASSERT(env);
99    if (array) {
100        fLen = env->GetArrayLength(array);
101        if (fLen < minLength) {
102            sk_throw();
103        }
104        fPtr = env->GetShortArrayElements(array, NULL);
105    }
106    fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0;
107}
108
109AutoJavaShortArray::~AutoJavaShortArray() {
110    if (fPtr) {
111        fEnv->ReleaseShortArrayElements(fArray, fPtr, fReleaseMode);
112    }
113}
114
115AutoJavaByteArray::AutoJavaByteArray(JNIEnv* env, jbyteArray array,
116                                       int minLength)
117: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
118    SkASSERT(env);
119    if (array) {
120        fLen = env->GetArrayLength(array);
121        if (fLen < minLength) {
122            sk_throw();
123        }
124        fPtr = env->GetByteArrayElements(array, NULL);
125    }
126}
127
128AutoJavaByteArray::~AutoJavaByteArray() {
129    if (fPtr) {
130        fEnv->ReleaseByteArrayElements(fArray, fPtr, 0);
131    }
132}
133
134///////////////////////////////////////////////////////////////////////////////
135
136static jclass   gRect_class;
137static jfieldID gRect_leftFieldID;
138static jfieldID gRect_topFieldID;
139static jfieldID gRect_rightFieldID;
140static jfieldID gRect_bottomFieldID;
141
142static jclass   gRectF_class;
143static jfieldID gRectF_leftFieldID;
144static jfieldID gRectF_topFieldID;
145static jfieldID gRectF_rightFieldID;
146static jfieldID gRectF_bottomFieldID;
147
148static jclass   gPoint_class;
149static jfieldID gPoint_xFieldID;
150static jfieldID gPoint_yFieldID;
151
152static jclass   gPointF_class;
153static jfieldID gPointF_xFieldID;
154static jfieldID gPointF_yFieldID;
155
156static jclass   gBitmap_class;
157static jfieldID gBitmap_skBitmapPtr;
158static jmethodID gBitmap_constructorMethodID;
159static jmethodID gBitmap_reinitMethodID;
160static jmethodID gBitmap_getAllocationByteCountMethodID;
161
162static jclass   gBitmapConfig_class;
163static jfieldID gBitmapConfig_nativeInstanceID;
164
165static jclass   gBitmapRegionDecoder_class;
166static jmethodID gBitmapRegionDecoder_constructorMethodID;
167
168static jclass   gCanvas_class;
169static jfieldID gCanvas_nativeInstanceID;
170
171static jclass   gPicture_class;
172static jfieldID gPicture_nativeInstanceID;
173
174static jclass   gRegion_class;
175static jfieldID gRegion_nativeInstanceID;
176static jmethodID gRegion_constructorMethodID;
177
178static jclass    gByte_class;
179static jobject   gVMRuntime;
180static jclass    gVMRuntime_class;
181static jmethodID gVMRuntime_newNonMovableArray;
182static jmethodID gVMRuntime_addressOf;
183
184///////////////////////////////////////////////////////////////////////////////
185
186void GraphicsJNI::get_jrect(JNIEnv* env, jobject obj, int* L, int* T, int* R, int* B)
187{
188    SkASSERT(env->IsInstanceOf(obj, gRect_class));
189
190    *L = env->GetIntField(obj, gRect_leftFieldID);
191    *T = env->GetIntField(obj, gRect_topFieldID);
192    *R = env->GetIntField(obj, gRect_rightFieldID);
193    *B = env->GetIntField(obj, gRect_bottomFieldID);
194}
195
196void GraphicsJNI::set_jrect(JNIEnv* env, jobject obj, int L, int T, int R, int B)
197{
198    SkASSERT(env->IsInstanceOf(obj, gRect_class));
199
200    env->SetIntField(obj, gRect_leftFieldID, L);
201    env->SetIntField(obj, gRect_topFieldID, T);
202    env->SetIntField(obj, gRect_rightFieldID, R);
203    env->SetIntField(obj, gRect_bottomFieldID, B);
204}
205
206SkIRect* GraphicsJNI::jrect_to_irect(JNIEnv* env, jobject obj, SkIRect* ir)
207{
208    SkASSERT(env->IsInstanceOf(obj, gRect_class));
209
210    ir->set(env->GetIntField(obj, gRect_leftFieldID),
211            env->GetIntField(obj, gRect_topFieldID),
212            env->GetIntField(obj, gRect_rightFieldID),
213            env->GetIntField(obj, gRect_bottomFieldID));
214    return ir;
215}
216
217void GraphicsJNI::irect_to_jrect(const SkIRect& ir, JNIEnv* env, jobject obj)
218{
219    SkASSERT(env->IsInstanceOf(obj, gRect_class));
220
221    env->SetIntField(obj, gRect_leftFieldID, ir.fLeft);
222    env->SetIntField(obj, gRect_topFieldID, ir.fTop);
223    env->SetIntField(obj, gRect_rightFieldID, ir.fRight);
224    env->SetIntField(obj, gRect_bottomFieldID, ir.fBottom);
225}
226
227SkRect* GraphicsJNI::jrectf_to_rect(JNIEnv* env, jobject obj, SkRect* r)
228{
229    SkASSERT(env->IsInstanceOf(obj, gRectF_class));
230
231    r->set(env->GetFloatField(obj, gRectF_leftFieldID),
232           env->GetFloatField(obj, gRectF_topFieldID),
233           env->GetFloatField(obj, gRectF_rightFieldID),
234           env->GetFloatField(obj, gRectF_bottomFieldID));
235    return r;
236}
237
238SkRect* GraphicsJNI::jrect_to_rect(JNIEnv* env, jobject obj, SkRect* r)
239{
240    SkASSERT(env->IsInstanceOf(obj, gRect_class));
241
242    r->set(SkIntToScalar(env->GetIntField(obj, gRect_leftFieldID)),
243           SkIntToScalar(env->GetIntField(obj, gRect_topFieldID)),
244           SkIntToScalar(env->GetIntField(obj, gRect_rightFieldID)),
245           SkIntToScalar(env->GetIntField(obj, gRect_bottomFieldID)));
246    return r;
247}
248
249void GraphicsJNI::rect_to_jrectf(const SkRect& r, JNIEnv* env, jobject obj)
250{
251    SkASSERT(env->IsInstanceOf(obj, gRectF_class));
252
253    env->SetFloatField(obj, gRectF_leftFieldID, SkScalarToFloat(r.fLeft));
254    env->SetFloatField(obj, gRectF_topFieldID, SkScalarToFloat(r.fTop));
255    env->SetFloatField(obj, gRectF_rightFieldID, SkScalarToFloat(r.fRight));
256    env->SetFloatField(obj, gRectF_bottomFieldID, SkScalarToFloat(r.fBottom));
257}
258
259SkIPoint* GraphicsJNI::jpoint_to_ipoint(JNIEnv* env, jobject obj, SkIPoint* point)
260{
261    SkASSERT(env->IsInstanceOf(obj, gPoint_class));
262
263    point->set(env->GetIntField(obj, gPoint_xFieldID),
264               env->GetIntField(obj, gPoint_yFieldID));
265    return point;
266}
267
268void GraphicsJNI::ipoint_to_jpoint(const SkIPoint& ir, JNIEnv* env, jobject obj)
269{
270    SkASSERT(env->IsInstanceOf(obj, gPoint_class));
271
272    env->SetIntField(obj, gPoint_xFieldID, ir.fX);
273    env->SetIntField(obj, gPoint_yFieldID, ir.fY);
274}
275
276SkPoint* GraphicsJNI::jpointf_to_point(JNIEnv* env, jobject obj, SkPoint* point)
277{
278    SkASSERT(env->IsInstanceOf(obj, gPointF_class));
279
280    point->set(env->GetIntField(obj, gPointF_xFieldID),
281               env->GetIntField(obj, gPointF_yFieldID));
282    return point;
283}
284
285void GraphicsJNI::point_to_jpointf(const SkPoint& r, JNIEnv* env, jobject obj)
286{
287    SkASSERT(env->IsInstanceOf(obj, gPointF_class));
288
289    env->SetFloatField(obj, gPointF_xFieldID, SkScalarToFloat(r.fX));
290    env->SetFloatField(obj, gPointF_yFieldID, SkScalarToFloat(r.fY));
291}
292
293// This enum must keep these int values, to match the int values
294// in the java Bitmap.Config enum.
295enum LegacyBitmapConfig {
296    kNo_LegacyBitmapConfig          = 0,
297    kA8_LegacyBitmapConfig          = 1,
298    kIndex8_LegacyBitmapConfig      = 2,
299    kRGB_565_LegacyBitmapConfig     = 3,
300    kARGB_4444_LegacyBitmapConfig   = 4,
301    kARGB_8888_LegacyBitmapConfig   = 5,
302
303    kLastEnum_LegacyBitmapConfig = kARGB_8888_LegacyBitmapConfig
304};
305
306jint GraphicsJNI::colorTypeToLegacyBitmapConfig(SkColorType colorType) {
307    switch (colorType) {
308        case kN32_SkColorType:
309            return kARGB_8888_LegacyBitmapConfig;
310        case kARGB_4444_SkColorType:
311            return kARGB_4444_LegacyBitmapConfig;
312        case kRGB_565_SkColorType:
313            return kRGB_565_LegacyBitmapConfig;
314        case kIndex_8_SkColorType:
315            return kIndex8_LegacyBitmapConfig;
316        case kAlpha_8_SkColorType:
317            return kA8_LegacyBitmapConfig;
318        case kUnknown_SkColorType:
319        default:
320            break;
321    }
322    return kNo_LegacyBitmapConfig;
323}
324
325SkColorType GraphicsJNI::legacyBitmapConfigToColorType(jint legacyConfig) {
326    const uint8_t gConfig2ColorType[] = {
327        kUnknown_SkColorType,
328        kAlpha_8_SkColorType,
329        kIndex_8_SkColorType,
330        kRGB_565_SkColorType,
331        kARGB_4444_SkColorType,
332        kN32_SkColorType
333    };
334
335    if (legacyConfig < 0 || legacyConfig > kLastEnum_LegacyBitmapConfig) {
336        legacyConfig = kNo_LegacyBitmapConfig;
337    }
338    return static_cast<SkColorType>(gConfig2ColorType[legacyConfig]);
339}
340
341SkBitmap* GraphicsJNI::getSkBitmapDeprecated(JNIEnv* env, jobject bitmap) {
342    SkASSERT(env);
343    SkASSERT(bitmap);
344    SkASSERT(env->IsInstanceOf(bitmap, gBitmap_class));
345    jlong bitmapHandle = env->GetLongField(bitmap, gBitmap_skBitmapPtr);
346    SkBitmap* b = reinterpret_cast<SkBitmap*>(bitmapHandle);
347    SkASSERT(b);
348    return b;
349}
350
351void GraphicsJNI::getSkBitmap(JNIEnv* env, jobject bitmap, SkBitmap* outBitmap) {
352    // TODO: We have to copy from the existing bitmap due to rowBytes not
353    // being updated on the SkPixelRef at reconfigure time. This is a short term
354    // problem that will be fixed with the specialized wrapper
355    *outBitmap = *getSkBitmapDeprecated(env, bitmap);
356}
357
358SkPixelRef* GraphicsJNI::getSkPixelRef(JNIEnv* env, jobject bitmap) {
359    jlong bitmapHandle = env->GetLongField(bitmap, gBitmap_skBitmapPtr);
360    SkBitmap* b = reinterpret_cast<SkBitmap*>(bitmapHandle);
361    return b->pixelRef();
362}
363
364SkColorType GraphicsJNI::getNativeBitmapColorType(JNIEnv* env, jobject jconfig) {
365    SkASSERT(env);
366    if (NULL == jconfig) {
367        return kUnknown_SkColorType;
368    }
369    SkASSERT(env->IsInstanceOf(jconfig, gBitmapConfig_class));
370    int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID);
371    return legacyBitmapConfigToColorType(c);
372}
373
374android::Canvas* GraphicsJNI::getNativeCanvas(JNIEnv* env, jobject canvas) {
375    SkASSERT(env);
376    SkASSERT(canvas);
377    SkASSERT(env->IsInstanceOf(canvas, gCanvas_class));
378    jlong canvasHandle = env->GetLongField(canvas, gCanvas_nativeInstanceID);
379    if (!canvasHandle) {
380        return NULL;
381    }
382    return reinterpret_cast<android::Canvas*>(canvasHandle);
383}
384
385SkRegion* GraphicsJNI::getNativeRegion(JNIEnv* env, jobject region)
386{
387    SkASSERT(env);
388    SkASSERT(region);
389    SkASSERT(env->IsInstanceOf(region, gRegion_class));
390    jlong regionHandle = env->GetLongField(region, gRegion_nativeInstanceID);
391    SkRegion* r = reinterpret_cast<SkRegion*>(regionHandle);
392    SkASSERT(r);
393    return r;
394}
395
396///////////////////////////////////////////////////////////////////////////////////////////
397
398// Assert that bitmap's SkAlphaType is consistent with isPremultiplied.
399static void assert_premultiplied(const SkBitmap& bitmap, bool isPremultiplied) {
400    // kOpaque_SkAlphaType and kIgnore_SkAlphaType mean that isPremultiplied is
401    // irrelevant. This just tests to ensure that the SkAlphaType is not
402    // opposite of isPremultiplied.
403    if (isPremultiplied) {
404        SkASSERT(bitmap.alphaType() != kUnpremul_SkAlphaType);
405    } else {
406        SkASSERT(bitmap.alphaType() != kPremul_SkAlphaType);
407    }
408}
409
410jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, jbyteArray buffer,
411        int bitmapCreateFlags, jbyteArray ninePatchChunk, jobject ninePatchInsets, int density)
412{
413    SkASSERT(bitmap);
414    SkASSERT(bitmap->pixelRef());
415    SkASSERT(!env->ExceptionCheck());
416    bool isMutable = bitmapCreateFlags & kBitmapCreateFlag_Mutable;
417    bool isPremultiplied = bitmapCreateFlags & kBitmapCreateFlag_Premultiplied;
418
419    // The caller needs to have already set the alpha type properly, so the
420    // native SkBitmap stays in sync with the Java Bitmap.
421    assert_premultiplied(*bitmap, isPremultiplied);
422
423    jobject obj = env->NewObject(gBitmap_class, gBitmap_constructorMethodID,
424            reinterpret_cast<jlong>(bitmap), buffer,
425            bitmap->width(), bitmap->height(), density, isMutable, isPremultiplied,
426            ninePatchChunk, ninePatchInsets);
427    hasException(env); // For the side effect of logging.
428    return obj;
429}
430
431void GraphicsJNI::reinitBitmap(JNIEnv* env, jobject javaBitmap, SkBitmap* bitmap,
432        bool isPremultiplied)
433{
434    // The caller needs to have already set the alpha type properly, so the
435    // native SkBitmap stays in sync with the Java Bitmap.
436    assert_premultiplied(*bitmap, isPremultiplied);
437
438    env->CallVoidMethod(javaBitmap, gBitmap_reinitMethodID,
439            bitmap->width(), bitmap->height(), isPremultiplied);
440}
441
442int GraphicsJNI::getBitmapAllocationByteCount(JNIEnv* env, jobject javaBitmap)
443{
444    return env->CallIntMethod(javaBitmap, gBitmap_getAllocationByteCountMethodID);
445}
446
447jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap)
448{
449    SkASSERT(bitmap != NULL);
450
451    jobject obj = env->NewObject(gBitmapRegionDecoder_class,
452            gBitmapRegionDecoder_constructorMethodID,
453            reinterpret_cast<jlong>(bitmap));
454    hasException(env); // For the side effect of logging.
455    return obj;
456}
457
458jobject GraphicsJNI::createRegion(JNIEnv* env, SkRegion* region)
459{
460    SkASSERT(region != NULL);
461    jobject obj = env->NewObject(gRegion_class, gRegion_constructorMethodID,
462                                 reinterpret_cast<jlong>(region), 0);
463    hasException(env); // For the side effect of logging.
464    return obj;
465}
466
467static JNIEnv* vm2env(JavaVM* vm)
468{
469    JNIEnv* env = NULL;
470    if (vm->GetEnv((void**)&env, JNI_VERSION_1_4) != JNI_OK || NULL == env)
471    {
472        SkDebugf("------- [%p] vm->GetEnv() failed\n", vm);
473        sk_throw();
474    }
475    return env;
476}
477
478///////////////////////////////////////////////////////////////////////////////
479
480AndroidPixelRef::AndroidPixelRef(JNIEnv* env, const SkImageInfo& info, void* storage,
481        size_t rowBytes, jbyteArray storageObj, SkColorTable* ctable) :
482        SkMallocPixelRef(info, storage, rowBytes, ctable, (storageObj == NULL)),
483        fWrappedPixelRef(NULL) {
484    SkASSERT(storage);
485    SkASSERT(storageObj);
486    SkASSERT(env);
487
488    if (env->GetJavaVM(&fVM) != JNI_OK) {
489        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
490        sk_throw();
491    }
492
493    fStorageObj = (jbyteArray) env->NewGlobalRef(storageObj);
494}
495
496AndroidPixelRef::AndroidPixelRef(AndroidPixelRef& wrappedPixelRef, const SkImageInfo& info,
497        size_t rowBytes, SkColorTable* ctable) :
498        SkMallocPixelRef(info, wrappedPixelRef.getAddr(), rowBytes, ctable, false),
499        fWrappedPixelRef(wrappedPixelRef.fWrappedPixelRef ?
500                wrappedPixelRef.fWrappedPixelRef : &wrappedPixelRef)
501{
502    SkASSERT(fWrappedPixelRef);
503    SkSafeRef(fWrappedPixelRef);
504
505    // don't need to initialize this, as all the relevant logic delegates to the wrapped ref
506    fStorageObj = NULL;
507}
508
509AndroidPixelRef::~AndroidPixelRef() {
510    if (fWrappedPixelRef) {
511        SkSafeUnref(fWrappedPixelRef);
512    } else {
513        SkASSERT(fStorageObj);
514        JNIEnv* env = vm2env(fVM);
515        env->DeleteGlobalRef(fStorageObj);
516    }
517
518    if (android::uirenderer::Caches::hasInstance()) {
519        android::uirenderer::Caches::getInstance().textureCache.releaseTexture(getStableID());
520    }
521}
522
523///////////////////////////////////////////////////////////////////////////////
524
525static bool computeAllocationSize(const SkBitmap& bitmap, size_t* size) {
526    int32_t rowBytes32 = SkToS32(bitmap.rowBytes());
527    int64_t bigSize = (int64_t)bitmap.height() * rowBytes32;
528    if (rowBytes32 < 0 || !sk_64_isS32(bigSize)) {
529        return false; // allocation will be too large
530    }
531
532    *size = sk_64_asS32(bigSize);
533    return true;
534}
535
536jbyteArray GraphicsJNI::allocateJavaPixelRef(JNIEnv* env, SkBitmap* bitmap,
537                                             SkColorTable* ctable) {
538    const SkImageInfo& info = bitmap->info();
539    if (info.fColorType == kUnknown_SkColorType) {
540        doThrowIAE(env, "unknown bitmap configuration");
541        return NULL;
542    }
543
544    size_t size;
545    if (!computeAllocationSize(*bitmap, &size)) {
546        return NULL;
547    }
548
549    // we must respect the rowBytes value already set on the bitmap instead of
550    // attempting to compute our own.
551    const size_t rowBytes = bitmap->rowBytes();
552
553    jbyteArray arrayObj = (jbyteArray) env->CallObjectMethod(gVMRuntime,
554                                                             gVMRuntime_newNonMovableArray,
555                                                             gByte_class, size);
556    if (env->ExceptionCheck() != 0) {
557        return NULL;
558    }
559    SkASSERT(arrayObj);
560    jbyte* addr = (jbyte*) env->CallLongMethod(gVMRuntime, gVMRuntime_addressOf, arrayObj);
561    if (env->ExceptionCheck() != 0) {
562        return NULL;
563    }
564    SkASSERT(addr);
565    SkPixelRef* pr = new AndroidPixelRef(env, info, (void*) addr, rowBytes, arrayObj, ctable);
566    bitmap->setPixelRef(pr)->unref();
567    // since we're already allocated, we lockPixels right away
568    // HeapAllocator behaves this way too
569    bitmap->lockPixels();
570
571    return arrayObj;
572}
573
574struct AndroidPixelRefContext {
575    int32_t stableID;
576};
577
578static void allocatePixelsReleaseProc(void* ptr, void* ctx) {
579    AndroidPixelRefContext* context = (AndroidPixelRefContext*)ctx;
580    if (android::uirenderer::Caches::hasInstance()) {
581         android::uirenderer::Caches::getInstance().textureCache.releaseTexture(context->stableID);
582    }
583
584    sk_free(ptr);
585    delete context;
586}
587
588bool GraphicsJNI::allocatePixels(JNIEnv* env, SkBitmap* bitmap, SkColorTable* ctable) {
589    const SkImageInfo& info = bitmap->info();
590    if (info.fColorType == kUnknown_SkColorType) {
591        doThrowIAE(env, "unknown bitmap configuration");
592        return NULL;
593    }
594
595    size_t size;
596    if (!computeAllocationSize(*bitmap, &size)) {
597        return false;
598    }
599
600    // we must respect the rowBytes value already set on the bitmap instead of
601    // attempting to compute our own.
602    const size_t rowBytes = bitmap->rowBytes();
603
604    void* addr = sk_malloc_flags(size, 0);
605    if (NULL == addr) {
606        return false;
607    }
608
609    AndroidPixelRefContext* context = new AndroidPixelRefContext;
610    SkMallocPixelRef* pr = SkMallocPixelRef::NewWithProc(info, rowBytes, ctable, addr,
611                                                         &allocatePixelsReleaseProc, context);
612    if (!pr) {
613        delete context;
614        return false;
615    }
616
617    // set the stableID in the context so that it can be used later in
618    // allocatePixelsReleaseProc to remove the texture from the cache.
619    context->stableID = pr->getStableID();
620
621    bitmap->setPixelRef(pr)->unref();
622    // since we're already allocated, we can lockPixels right away
623    bitmap->lockPixels();
624
625    return true;
626}
627
628///////////////////////////////////////////////////////////////////////////////
629
630JavaPixelAllocator::JavaPixelAllocator(JNIEnv* env)
631    : fStorageObj(NULL),
632      fAllocCount(0) {
633    if (env->GetJavaVM(&fVM) != JNI_OK) {
634        SkDebugf("------ [%p] env->GetJavaVM failed\n", env);
635        sk_throw();
636    }
637}
638
639bool JavaPixelAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
640    JNIEnv* env = vm2env(fVM);
641
642    fStorageObj = GraphicsJNI::allocateJavaPixelRef(env, bitmap, ctable);
643    fAllocCount += 1;
644    return fStorageObj != NULL;
645}
646
647////////////////////////////////////////////////////////////////////////////////
648
649static jclass make_globalref(JNIEnv* env, const char classname[])
650{
651    jclass c = env->FindClass(classname);
652    SkASSERT(c);
653    return (jclass) env->NewGlobalRef(c);
654}
655
656static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz,
657                                const char fieldname[], const char type[])
658{
659    jfieldID id = env->GetFieldID(clazz, fieldname, type);
660    SkASSERT(id);
661    return id;
662}
663
664int register_android_graphics_Graphics(JNIEnv* env)
665{
666    jmethodID m;
667    jclass c;
668
669    gRect_class = make_globalref(env, "android/graphics/Rect");
670    gRect_leftFieldID = getFieldIDCheck(env, gRect_class, "left", "I");
671    gRect_topFieldID = getFieldIDCheck(env, gRect_class, "top", "I");
672    gRect_rightFieldID = getFieldIDCheck(env, gRect_class, "right", "I");
673    gRect_bottomFieldID = getFieldIDCheck(env, gRect_class, "bottom", "I");
674
675    gRectF_class = make_globalref(env, "android/graphics/RectF");
676    gRectF_leftFieldID = getFieldIDCheck(env, gRectF_class, "left", "F");
677    gRectF_topFieldID = getFieldIDCheck(env, gRectF_class, "top", "F");
678    gRectF_rightFieldID = getFieldIDCheck(env, gRectF_class, "right", "F");
679    gRectF_bottomFieldID = getFieldIDCheck(env, gRectF_class, "bottom", "F");
680
681    gPoint_class = make_globalref(env, "android/graphics/Point");
682    gPoint_xFieldID = getFieldIDCheck(env, gPoint_class, "x", "I");
683    gPoint_yFieldID = getFieldIDCheck(env, gPoint_class, "y", "I");
684
685    gPointF_class = make_globalref(env, "android/graphics/PointF");
686    gPointF_xFieldID = getFieldIDCheck(env, gPointF_class, "x", "F");
687    gPointF_yFieldID = getFieldIDCheck(env, gPointF_class, "y", "F");
688
689    gBitmap_class = make_globalref(env, "android/graphics/Bitmap");
690    gBitmap_skBitmapPtr = getFieldIDCheck(env, gBitmap_class, "mSkBitmapPtr", "J");
691    gBitmap_constructorMethodID = env->GetMethodID(gBitmap_class, "<init>", "(J[BIIIZZ[BLandroid/graphics/NinePatch$InsetStruct;)V");
692    gBitmap_reinitMethodID = env->GetMethodID(gBitmap_class, "reinit", "(IIZ)V");
693    gBitmap_getAllocationByteCountMethodID = env->GetMethodID(gBitmap_class, "getAllocationByteCount", "()I");
694    gBitmapRegionDecoder_class = make_globalref(env, "android/graphics/BitmapRegionDecoder");
695    gBitmapRegionDecoder_constructorMethodID = env->GetMethodID(gBitmapRegionDecoder_class, "<init>", "(J)V");
696
697    gBitmapConfig_class = make_globalref(env, "android/graphics/Bitmap$Config");
698    gBitmapConfig_nativeInstanceID = getFieldIDCheck(env, gBitmapConfig_class,
699                                                     "nativeInt", "I");
700
701    gCanvas_class = make_globalref(env, "android/graphics/Canvas");
702    gCanvas_nativeInstanceID = getFieldIDCheck(env, gCanvas_class, "mNativeCanvasWrapper", "J");
703
704    gPicture_class = make_globalref(env, "android/graphics/Picture");
705    gPicture_nativeInstanceID = getFieldIDCheck(env, gPicture_class, "mNativePicture", "J");
706
707    gRegion_class = make_globalref(env, "android/graphics/Region");
708    gRegion_nativeInstanceID = getFieldIDCheck(env, gRegion_class, "mNativeRegion", "J");
709    gRegion_constructorMethodID = env->GetMethodID(gRegion_class, "<init>",
710        "(JI)V");
711
712    c = env->FindClass("java/lang/Byte");
713    gByte_class = (jclass) env->NewGlobalRef(
714        env->GetStaticObjectField(c, env->GetStaticFieldID(c, "TYPE", "Ljava/lang/Class;")));
715
716    gVMRuntime_class = make_globalref(env, "dalvik/system/VMRuntime");
717    m = env->GetStaticMethodID(gVMRuntime_class, "getRuntime", "()Ldalvik/system/VMRuntime;");
718    gVMRuntime = env->NewGlobalRef(env->CallStaticObjectMethod(gVMRuntime_class, m));
719    gVMRuntime_newNonMovableArray = env->GetMethodID(gVMRuntime_class, "newNonMovableArray",
720                                                     "(Ljava/lang/Class;I)Ljava/lang/Object;");
721    gVMRuntime_addressOf = env->GetMethodID(gVMRuntime_class, "addressOf", "(Ljava/lang/Object;)J");
722
723    return 0;
724}
725