Graphics.cpp revision 109109cdd5004789d5caf6da743986f26cb54e7b
1#define LOG_TAG "GraphicsJNI" 2 3#include "jni.h" 4#include "JNIHelp.h" 5#include "GraphicsJNI.h" 6 7#include "SkCanvas.h" 8#include "SkDevice.h" 9#include "SkPicture.h" 10#include "SkRegion.h" 11#include <android_runtime/AndroidRuntime.h> 12 13void doThrowNPE(JNIEnv* env) { 14 jniThrowNullPointerException(env, NULL); 15} 16 17void doThrowAIOOBE(JNIEnv* env) { 18 jniThrowException(env, "java/lang/ArrayIndexOutOfBoundsException", NULL); 19} 20 21void doThrowRE(JNIEnv* env, const char* msg) { 22 jniThrowRuntimeException(env, msg); 23} 24 25void doThrowIAE(JNIEnv* env, const char* msg) { 26 jniThrowException(env, "java/lang/IllegalArgumentException", msg); 27} 28 29void doThrowISE(JNIEnv* env, const char* msg) { 30 jniThrowException(env, "java/lang/IllegalStateException", msg); 31} 32 33void doThrowOOME(JNIEnv* env, const char* msg) { 34 jniThrowException(env, "java/lang/OutOfMemoryError", msg); 35} 36 37void doThrowIOE(JNIEnv* env, const char* msg) { 38 jniThrowException(env, "java/io/IOException", msg); 39} 40 41bool GraphicsJNI::hasException(JNIEnv *env) { 42 if (env->ExceptionCheck() != 0) { 43 ALOGE("*** Uncaught exception returned from Java call!\n"); 44 env->ExceptionDescribe(); 45 return true; 46 } 47 return false; 48} 49 50/////////////////////////////////////////////////////////////////////////////// 51 52AutoJavaFloatArray::AutoJavaFloatArray(JNIEnv* env, jfloatArray array, 53 int minLength, JNIAccess access) 54: fEnv(env), fArray(array), fPtr(NULL), fLen(0) { 55 SkASSERT(env); 56 if (array) { 57 fLen = env->GetArrayLength(array); 58 if (fLen < minLength) { 59 sk_throw(); 60 } 61 fPtr = env->GetFloatArrayElements(array, NULL); 62 } 63 fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0; 64} 65 66AutoJavaFloatArray::~AutoJavaFloatArray() { 67 if (fPtr) { 68 fEnv->ReleaseFloatArrayElements(fArray, fPtr, fReleaseMode); 69 } 70} 71 72AutoJavaIntArray::AutoJavaIntArray(JNIEnv* env, jintArray array, 73 int minLength) 74: fEnv(env), fArray(array), fPtr(NULL), fLen(0) { 75 SkASSERT(env); 76 if (array) { 77 fLen = env->GetArrayLength(array); 78 if (fLen < minLength) { 79 sk_throw(); 80 } 81 fPtr = env->GetIntArrayElements(array, NULL); 82 } 83} 84 85AutoJavaIntArray::~AutoJavaIntArray() { 86 if (fPtr) { 87 fEnv->ReleaseIntArrayElements(fArray, fPtr, 0); 88 } 89} 90 91AutoJavaShortArray::AutoJavaShortArray(JNIEnv* env, jshortArray array, 92 int minLength, JNIAccess access) 93: fEnv(env), fArray(array), fPtr(NULL), fLen(0) { 94 SkASSERT(env); 95 if (array) { 96 fLen = env->GetArrayLength(array); 97 if (fLen < minLength) { 98 sk_throw(); 99 } 100 fPtr = env->GetShortArrayElements(array, NULL); 101 } 102 fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0; 103} 104 105AutoJavaShortArray::~AutoJavaShortArray() { 106 if (fPtr) { 107 fEnv->ReleaseShortArrayElements(fArray, fPtr, fReleaseMode); 108 } 109} 110 111AutoJavaByteArray::AutoJavaByteArray(JNIEnv* env, jbyteArray array, 112 int minLength) 113: fEnv(env), fArray(array), fPtr(NULL), fLen(0) { 114 SkASSERT(env); 115 if (array) { 116 fLen = env->GetArrayLength(array); 117 if (fLen < minLength) { 118 sk_throw(); 119 } 120 fPtr = env->GetByteArrayElements(array, NULL); 121 } 122} 123 124AutoJavaByteArray::~AutoJavaByteArray() { 125 if (fPtr) { 126 fEnv->ReleaseByteArrayElements(fArray, fPtr, 0); 127 } 128} 129 130/////////////////////////////////////////////////////////////////////////////// 131 132static jclass gRect_class; 133static jfieldID gRect_leftFieldID; 134static jfieldID gRect_topFieldID; 135static jfieldID gRect_rightFieldID; 136static jfieldID gRect_bottomFieldID; 137 138static jclass gRectF_class; 139static jfieldID gRectF_leftFieldID; 140static jfieldID gRectF_topFieldID; 141static jfieldID gRectF_rightFieldID; 142static jfieldID gRectF_bottomFieldID; 143 144static jclass gPoint_class; 145static jfieldID gPoint_xFieldID; 146static jfieldID gPoint_yFieldID; 147 148static jclass gPointF_class; 149static jfieldID gPointF_xFieldID; 150static jfieldID gPointF_yFieldID; 151 152static jclass gBitmap_class; 153static jfieldID gBitmap_nativeInstanceID; 154static jmethodID gBitmap_constructorMethodID; 155 156static jclass gBitmapConfig_class; 157static jfieldID gBitmapConfig_nativeInstanceID; 158 159static jclass gBitmapRegionDecoder_class; 160static jmethodID gBitmapRegionDecoder_constructorMethodID; 161 162static jclass gCanvas_class; 163static jfieldID gCanvas_nativeInstanceID; 164 165static jclass gPaint_class; 166static jfieldID gPaint_nativeInstanceID; 167 168static jclass gPicture_class; 169static jfieldID gPicture_nativeInstanceID; 170 171static jclass gRegion_class; 172static jfieldID gRegion_nativeInstanceID; 173static jmethodID gRegion_constructorMethodID; 174 175/////////////////////////////////////////////////////////////////////////////// 176 177void GraphicsJNI::get_jrect(JNIEnv* env, jobject obj, int* L, int* T, int* R, int* B) 178{ 179 SkASSERT(env->IsInstanceOf(obj, gRect_class)); 180 181 *L = env->GetIntField(obj, gRect_leftFieldID); 182 *T = env->GetIntField(obj, gRect_topFieldID); 183 *R = env->GetIntField(obj, gRect_rightFieldID); 184 *B = env->GetIntField(obj, gRect_bottomFieldID); 185} 186 187void GraphicsJNI::set_jrect(JNIEnv* env, jobject obj, int L, int T, int R, int B) 188{ 189 SkASSERT(env->IsInstanceOf(obj, gRect_class)); 190 191 env->SetIntField(obj, gRect_leftFieldID, L); 192 env->SetIntField(obj, gRect_topFieldID, T); 193 env->SetIntField(obj, gRect_rightFieldID, R); 194 env->SetIntField(obj, gRect_bottomFieldID, B); 195} 196 197SkIRect* GraphicsJNI::jrect_to_irect(JNIEnv* env, jobject obj, SkIRect* ir) 198{ 199 SkASSERT(env->IsInstanceOf(obj, gRect_class)); 200 201 ir->set(env->GetIntField(obj, gRect_leftFieldID), 202 env->GetIntField(obj, gRect_topFieldID), 203 env->GetIntField(obj, gRect_rightFieldID), 204 env->GetIntField(obj, gRect_bottomFieldID)); 205 return ir; 206} 207 208void GraphicsJNI::irect_to_jrect(const SkIRect& ir, JNIEnv* env, jobject obj) 209{ 210 SkASSERT(env->IsInstanceOf(obj, gRect_class)); 211 212 env->SetIntField(obj, gRect_leftFieldID, ir.fLeft); 213 env->SetIntField(obj, gRect_topFieldID, ir.fTop); 214 env->SetIntField(obj, gRect_rightFieldID, ir.fRight); 215 env->SetIntField(obj, gRect_bottomFieldID, ir.fBottom); 216} 217 218SkRect* GraphicsJNI::jrectf_to_rect(JNIEnv* env, jobject obj, SkRect* r) 219{ 220 SkASSERT(env->IsInstanceOf(obj, gRectF_class)); 221 222 r->set(SkFloatToScalar(env->GetFloatField(obj, gRectF_leftFieldID)), 223 SkFloatToScalar(env->GetFloatField(obj, gRectF_topFieldID)), 224 SkFloatToScalar(env->GetFloatField(obj, gRectF_rightFieldID)), 225 SkFloatToScalar(env->GetFloatField(obj, gRectF_bottomFieldID))); 226 return r; 227} 228 229SkRect* GraphicsJNI::jrect_to_rect(JNIEnv* env, jobject obj, SkRect* r) 230{ 231 SkASSERT(env->IsInstanceOf(obj, gRect_class)); 232 233 r->set(SkIntToScalar(env->GetIntField(obj, gRect_leftFieldID)), 234 SkIntToScalar(env->GetIntField(obj, gRect_topFieldID)), 235 SkIntToScalar(env->GetIntField(obj, gRect_rightFieldID)), 236 SkIntToScalar(env->GetIntField(obj, gRect_bottomFieldID))); 237 return r; 238} 239 240void GraphicsJNI::rect_to_jrectf(const SkRect& r, JNIEnv* env, jobject obj) 241{ 242 SkASSERT(env->IsInstanceOf(obj, gRectF_class)); 243 244 env->SetFloatField(obj, gRectF_leftFieldID, SkScalarToFloat(r.fLeft)); 245 env->SetFloatField(obj, gRectF_topFieldID, SkScalarToFloat(r.fTop)); 246 env->SetFloatField(obj, gRectF_rightFieldID, SkScalarToFloat(r.fRight)); 247 env->SetFloatField(obj, gRectF_bottomFieldID, SkScalarToFloat(r.fBottom)); 248} 249 250SkIPoint* GraphicsJNI::jpoint_to_ipoint(JNIEnv* env, jobject obj, SkIPoint* point) 251{ 252 SkASSERT(env->IsInstanceOf(obj, gPoint_class)); 253 254 point->set(env->GetIntField(obj, gPoint_xFieldID), 255 env->GetIntField(obj, gPoint_yFieldID)); 256 return point; 257} 258 259void GraphicsJNI::ipoint_to_jpoint(const SkIPoint& ir, JNIEnv* env, jobject obj) 260{ 261 SkASSERT(env->IsInstanceOf(obj, gPoint_class)); 262 263 env->SetIntField(obj, gPoint_xFieldID, ir.fX); 264 env->SetIntField(obj, gPoint_yFieldID, ir.fY); 265} 266 267SkPoint* GraphicsJNI::jpointf_to_point(JNIEnv* env, jobject obj, SkPoint* point) 268{ 269 SkASSERT(env->IsInstanceOf(obj, gPointF_class)); 270 271 point->set(SkFloatToScalar(env->GetIntField(obj, gPointF_xFieldID)), 272 SkFloatToScalar(env->GetIntField(obj, gPointF_yFieldID))); 273 return point; 274} 275 276void GraphicsJNI::point_to_jpointf(const SkPoint& r, JNIEnv* env, jobject obj) 277{ 278 SkASSERT(env->IsInstanceOf(obj, gPointF_class)); 279 280 env->SetFloatField(obj, gPointF_xFieldID, SkScalarToFloat(r.fX)); 281 env->SetFloatField(obj, gPointF_yFieldID, SkScalarToFloat(r.fY)); 282} 283 284SkBitmap* GraphicsJNI::getNativeBitmap(JNIEnv* env, jobject bitmap) { 285 SkASSERT(env); 286 SkASSERT(bitmap); 287 SkASSERT(env->IsInstanceOf(bitmap, gBitmap_class)); 288 SkBitmap* b = (SkBitmap*)env->GetIntField(bitmap, gBitmap_nativeInstanceID); 289 SkASSERT(b); 290 return b; 291} 292 293SkBitmap::Config GraphicsJNI::getNativeBitmapConfig(JNIEnv* env, 294 jobject jconfig) { 295 SkASSERT(env); 296 if (NULL == jconfig) { 297 return SkBitmap::kNo_Config; 298 } 299 SkASSERT(env->IsInstanceOf(jconfig, gBitmapConfig_class)); 300 int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID); 301 if (c < 0 || c >= SkBitmap::kConfigCount) { 302 c = SkBitmap::kNo_Config; 303 } 304 return static_cast<SkBitmap::Config>(c); 305} 306 307SkCanvas* GraphicsJNI::getNativeCanvas(JNIEnv* env, jobject canvas) { 308 SkASSERT(env); 309 SkASSERT(canvas); 310 SkASSERT(env->IsInstanceOf(canvas, gCanvas_class)); 311 SkCanvas* c = (SkCanvas*)env->GetIntField(canvas, gCanvas_nativeInstanceID); 312 SkASSERT(c); 313 return c; 314} 315 316SkPaint* GraphicsJNI::getNativePaint(JNIEnv* env, jobject paint) { 317 SkASSERT(env); 318 SkASSERT(paint); 319 SkASSERT(env->IsInstanceOf(paint, gPaint_class)); 320 SkPaint* p = (SkPaint*)env->GetIntField(paint, gPaint_nativeInstanceID); 321 SkASSERT(p); 322 return p; 323} 324 325SkPicture* GraphicsJNI::getNativePicture(JNIEnv* env, jobject picture) 326{ 327 SkASSERT(env); 328 SkASSERT(picture); 329 SkASSERT(env->IsInstanceOf(picture, gPicture_class)); 330 SkPicture* p = (SkPicture*)env->GetIntField(picture, gPicture_nativeInstanceID); 331 SkASSERT(p); 332 return p; 333} 334 335SkRegion* GraphicsJNI::getNativeRegion(JNIEnv* env, jobject region) 336{ 337 SkASSERT(env); 338 SkASSERT(region); 339 SkASSERT(env->IsInstanceOf(region, gRegion_class)); 340 SkRegion* r = (SkRegion*)env->GetIntField(region, gRegion_nativeInstanceID); 341 SkASSERT(r); 342 return r; 343} 344 345/////////////////////////////////////////////////////////////////////////////////////////// 346 347jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, jbyteArray buffer, 348 bool isMutable, jbyteArray ninepatch, jintArray layoutbounds, 349 int density) 350{ 351 SkASSERT(bitmap); 352 SkASSERT(bitmap->pixelRef()); 353 jobject obj = env->NewObject(gBitmap_class, gBitmap_constructorMethodID, 354 static_cast<jint>(reinterpret_cast<uintptr_t>(bitmap)), 355 buffer, isMutable, ninepatch, layoutbounds, density); 356 hasException(env); // For the side effect of logging. 357 return obj; 358} 359 360jobject GraphicsJNI::createBitmap(JNIEnv* env, SkBitmap* bitmap, bool isMutable, 361 jbyteArray ninepatch, int density) 362{ 363 return createBitmap(env, bitmap, NULL, isMutable, ninepatch, NULL, density); 364} 365 366 367jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap) 368{ 369 SkASSERT(bitmap != NULL); 370 371 jobject obj = env->NewObject(gBitmapRegionDecoder_class, 372 gBitmapRegionDecoder_constructorMethodID, 373 static_cast<jint>(reinterpret_cast<uintptr_t>(bitmap))); 374 hasException(env); // For the side effect of logging. 375 return obj; 376} 377 378jobject GraphicsJNI::createRegion(JNIEnv* env, SkRegion* region) 379{ 380 SkASSERT(region != NULL); 381 jobject obj = env->NewObject(gRegion_class, gRegion_constructorMethodID, 382 static_cast<jint>(reinterpret_cast<uintptr_t>(region)), 0); 383 hasException(env); // For the side effect of logging. 384 return obj; 385} 386 387static JNIEnv* vm2env(JavaVM* vm) 388{ 389 JNIEnv* env = NULL; 390 if (vm->GetEnv((void**)&env, JNI_VERSION_1_4) != JNI_OK || NULL == env) 391 { 392 SkDebugf("------- [%p] vm->GetEnv() failed\n", vm); 393 sk_throw(); 394 } 395 return env; 396} 397 398/////////////////////////////////////////////////////////////////////////////// 399 400AndroidPixelRef::AndroidPixelRef(JNIEnv* env, void* storage, size_t size, jbyteArray storageObj, 401 SkColorTable* ctable) : SkMallocPixelRef(storage, size, ctable, (storageObj == NULL)) { 402 SkASSERT(storage); 403 SkASSERT(env); 404 405 if (env->GetJavaVM(&fVM) != JNI_OK) { 406 SkDebugf("------ [%p] env->GetJavaVM failed\n", env); 407 sk_throw(); 408 } 409 fStorageObj = storageObj; 410 fHasGlobalRef = false; 411 fGlobalRefCnt = 0; 412 413 // If storageObj is NULL, the memory was NOT allocated on the Java heap 414 fOnJavaHeap = (storageObj != NULL); 415 416} 417 418AndroidPixelRef::~AndroidPixelRef() { 419 if (fOnJavaHeap) { 420 JNIEnv* env = vm2env(fVM); 421 422 if (fStorageObj && fHasGlobalRef) { 423 env->DeleteGlobalRef(fStorageObj); 424 } 425 fStorageObj = NULL; 426 } 427} 428 429void AndroidPixelRef::setLocalJNIRef(jbyteArray arr) { 430 if (!fHasGlobalRef) { 431 fStorageObj = arr; 432 } 433} 434 435void AndroidPixelRef::globalRef(void* localref) { 436 if (fOnJavaHeap && sk_atomic_inc(&fGlobalRefCnt) == 0) { 437 JNIEnv *env = vm2env(fVM); 438 439 // If JNI ref was passed, it is always used 440 if (localref) fStorageObj = (jbyteArray) localref; 441 442 if (fStorageObj == NULL) { 443 SkDebugf("No valid local ref to create a JNI global ref\n"); 444 sk_throw(); 445 } 446 if (fHasGlobalRef) { 447 // This should never happen 448 SkDebugf("Already holding a JNI global ref"); 449 sk_throw(); 450 } 451 452 fStorageObj = (jbyteArray) env->NewGlobalRef(fStorageObj); 453 // TODO: Check for failure here 454 fHasGlobalRef = true; 455 } 456 ref(); 457} 458 459void AndroidPixelRef::globalUnref() { 460 if (fOnJavaHeap && sk_atomic_dec(&fGlobalRefCnt) == 1) { 461 JNIEnv *env = vm2env(fVM); 462 if (!fHasGlobalRef) { 463 SkDebugf("We don't have a global ref!"); 464 sk_throw(); 465 } 466 env->DeleteGlobalRef(fStorageObj); 467 fStorageObj = NULL; 468 fHasGlobalRef = false; 469 } 470 unref(); 471} 472 473/////////////////////////////////////////////////////////////////////////////// 474 475extern "C" jbyte* jniGetNonMovableArrayElements(C_JNIEnv* env, jarray arrayObj); 476 477jbyteArray GraphicsJNI::allocateJavaPixelRef(JNIEnv* env, SkBitmap* bitmap, 478 SkColorTable* ctable) { 479 Sk64 size64 = bitmap->getSize64(); 480 if (size64.isNeg() || !size64.is32()) { 481 jniThrowException(env, "java/lang/IllegalArgumentException", 482 "bitmap size exceeds 32bits"); 483 return NULL; 484 } 485 486 size_t size = size64.get32(); 487 jbyteArray arrayObj = env->NewByteArray(size); 488 if (arrayObj) { 489 // TODO: make this work without jniGetNonMovableArrayElements 490 jbyte* addr = jniGetNonMovableArrayElements(&env->functions, arrayObj); 491 if (addr) { 492 SkPixelRef* pr = new AndroidPixelRef(env, (void*) addr, size, arrayObj, ctable); 493 bitmap->setPixelRef(pr)->unref(); 494 // since we're already allocated, we lockPixels right away 495 // HeapAllocator behaves this way too 496 bitmap->lockPixels(); 497 } 498 } 499 500 return arrayObj; 501} 502 503/////////////////////////////////////////////////////////////////////////////// 504 505JavaPixelAllocator::JavaPixelAllocator(JNIEnv* env) 506 : fStorageObj(NULL), 507 fAllocCount(0) { 508 if (env->GetJavaVM(&fVM) != JNI_OK) { 509 SkDebugf("------ [%p] env->GetJavaVM failed\n", env); 510 sk_throw(); 511 } 512} 513 514bool JavaPixelAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) { 515 JNIEnv* env = vm2env(fVM); 516 517 fStorageObj = GraphicsJNI::allocateJavaPixelRef(env, bitmap, ctable); 518 fAllocCount += 1; 519 return fStorageObj != NULL; 520} 521 522//////////////////////////////////////////////////////////////////////////////// 523 524JavaHeapBitmapRef::JavaHeapBitmapRef(JNIEnv* env, SkBitmap* nativeBitmap, jbyteArray buffer) { 525 fEnv = env; 526 fNativeBitmap = nativeBitmap; 527 fBuffer = buffer; 528 529 // If the buffer is NULL, the backing memory wasn't allocated on the Java heap 530 if (fBuffer) { 531 ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(fBuffer); 532 } 533} 534 535JavaHeapBitmapRef::~JavaHeapBitmapRef() { 536 if (fBuffer) { 537 ((AndroidPixelRef*) fNativeBitmap->pixelRef())->setLocalJNIRef(NULL); 538 } 539} 540 541//////////////////////////////////////////////////////////////////////////////// 542 543static jclass make_globalref(JNIEnv* env, const char classname[]) 544{ 545 jclass c = env->FindClass(classname); 546 SkASSERT(c); 547 return (jclass)env->NewGlobalRef(c); 548} 549 550static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz, 551 const char fieldname[], const char type[]) 552{ 553 jfieldID id = env->GetFieldID(clazz, fieldname, type); 554 SkASSERT(id); 555 return id; 556} 557 558int register_android_graphics_Graphics(JNIEnv* env) 559{ 560 jmethodID m; 561 jclass c; 562 563 gRect_class = make_globalref(env, "android/graphics/Rect"); 564 gRect_leftFieldID = getFieldIDCheck(env, gRect_class, "left", "I"); 565 gRect_topFieldID = getFieldIDCheck(env, gRect_class, "top", "I"); 566 gRect_rightFieldID = getFieldIDCheck(env, gRect_class, "right", "I"); 567 gRect_bottomFieldID = getFieldIDCheck(env, gRect_class, "bottom", "I"); 568 569 gRectF_class = make_globalref(env, "android/graphics/RectF"); 570 gRectF_leftFieldID = getFieldIDCheck(env, gRectF_class, "left", "F"); 571 gRectF_topFieldID = getFieldIDCheck(env, gRectF_class, "top", "F"); 572 gRectF_rightFieldID = getFieldIDCheck(env, gRectF_class, "right", "F"); 573 gRectF_bottomFieldID = getFieldIDCheck(env, gRectF_class, "bottom", "F"); 574 575 gPoint_class = make_globalref(env, "android/graphics/Point"); 576 gPoint_xFieldID = getFieldIDCheck(env, gPoint_class, "x", "I"); 577 gPoint_yFieldID = getFieldIDCheck(env, gPoint_class, "y", "I"); 578 579 gPointF_class = make_globalref(env, "android/graphics/PointF"); 580 gPointF_xFieldID = getFieldIDCheck(env, gPointF_class, "x", "F"); 581 gPointF_yFieldID = getFieldIDCheck(env, gPointF_class, "y", "F"); 582 583 gBitmap_class = make_globalref(env, "android/graphics/Bitmap"); 584 gBitmap_nativeInstanceID = getFieldIDCheck(env, gBitmap_class, "mNativeBitmap", "I"); 585 gBitmap_constructorMethodID = env->GetMethodID(gBitmap_class, "<init>", 586 "(I[BZ[B[II)V"); 587 gBitmapRegionDecoder_class = make_globalref(env, "android/graphics/BitmapRegionDecoder"); 588 gBitmapRegionDecoder_constructorMethodID = env->GetMethodID(gBitmapRegionDecoder_class, "<init>", "(I)V"); 589 590 gBitmapConfig_class = make_globalref(env, "android/graphics/Bitmap$Config"); 591 gBitmapConfig_nativeInstanceID = getFieldIDCheck(env, gBitmapConfig_class, 592 "nativeInt", "I"); 593 594 gCanvas_class = make_globalref(env, "android/graphics/Canvas"); 595 gCanvas_nativeInstanceID = getFieldIDCheck(env, gCanvas_class, "mNativeCanvas", "I"); 596 597 gPaint_class = make_globalref(env, "android/graphics/Paint"); 598 gPaint_nativeInstanceID = getFieldIDCheck(env, gPaint_class, "mNativePaint", "I"); 599 600 gPicture_class = make_globalref(env, "android/graphics/Picture"); 601 gPicture_nativeInstanceID = getFieldIDCheck(env, gPicture_class, "mNativePicture", "I"); 602 603 gRegion_class = make_globalref(env, "android/graphics/Region"); 604 gRegion_nativeInstanceID = getFieldIDCheck(env, gRegion_class, "mNativeRegion", "I"); 605 gRegion_constructorMethodID = env->GetMethodID(gRegion_class, "<init>", 606 "(II)V"); 607 608 return 0; 609} 610