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      1 #define LOG_TAG "GraphicsJNI"
      2 
      3 #include <unistd.h>
      4 #include <sys/mman.h>
      5 
      6 #include "jni.h"
      7 #include "JNIHelp.h"
      8 #include "GraphicsJNI.h"
      9 #include "core_jni_helpers.h"
     10 
     11 #include "SkCanvas.h"
     12 #include "SkMath.h"
     13 #include "SkRegion.h"
     14 #include <android_runtime/AndroidRuntime.h>
     15 #include <cutils/ashmem.h>
     16 #include <hwui/Canvas.h>
     17 
     18 #include <Caches.h>
     19 #include <TextureCache.h>
     20 
     21 using namespace android;
     22 
     23 void doThrowNPE(JNIEnv* env) {
     24     jniThrowNullPointerException(env, NULL);
     25 }
     26 
     27 void doThrowAIOOBE(JNIEnv* env) {
     28     jniThrowException(env, "java/lang/ArrayIndexOutOfBoundsException", NULL);
     29 }
     30 
     31 void doThrowRE(JNIEnv* env, const char* msg) {
     32     jniThrowRuntimeException(env, msg);
     33 }
     34 
     35 void doThrowIAE(JNIEnv* env, const char* msg) {
     36     jniThrowException(env, "java/lang/IllegalArgumentException", msg);
     37 }
     38 
     39 void doThrowISE(JNIEnv* env, const char* msg) {
     40     jniThrowException(env, "java/lang/IllegalStateException", msg);
     41 }
     42 
     43 void doThrowOOME(JNIEnv* env, const char* msg) {
     44     jniThrowException(env, "java/lang/OutOfMemoryError", msg);
     45 }
     46 
     47 void doThrowIOE(JNIEnv* env, const char* msg) {
     48     jniThrowException(env, "java/io/IOException", msg);
     49 }
     50 
     51 bool GraphicsJNI::hasException(JNIEnv *env) {
     52     if (env->ExceptionCheck() != 0) {
     53         ALOGE("*** Uncaught exception returned from Java call!\n");
     54         env->ExceptionDescribe();
     55         return true;
     56     }
     57     return false;
     58 }
     59 
     60 ///////////////////////////////////////////////////////////////////////////////
     61 
     62 AutoJavaFloatArray::AutoJavaFloatArray(JNIEnv* env, jfloatArray array,
     63                                        int minLength, JNIAccess access)
     64 : fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
     65     SkASSERT(env);
     66     if (array) {
     67         fLen = env->GetArrayLength(array);
     68         if (fLen < minLength) {
     69             sk_throw();
     70         }
     71         fPtr = env->GetFloatArrayElements(array, NULL);
     72     }
     73     fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0;
     74 }
     75 
     76 AutoJavaFloatArray::~AutoJavaFloatArray() {
     77     if (fPtr) {
     78         fEnv->ReleaseFloatArrayElements(fArray, fPtr, fReleaseMode);
     79     }
     80 }
     81 
     82 AutoJavaIntArray::AutoJavaIntArray(JNIEnv* env, jintArray array,
     83                                        int minLength)
     84 : fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
     85     SkASSERT(env);
     86     if (array) {
     87         fLen = env->GetArrayLength(array);
     88         if (fLen < minLength) {
     89             sk_throw();
     90         }
     91         fPtr = env->GetIntArrayElements(array, NULL);
     92     }
     93 }
     94 
     95 AutoJavaIntArray::~AutoJavaIntArray() {
     96     if (fPtr) {
     97         fEnv->ReleaseIntArrayElements(fArray, fPtr, 0);
     98     }
     99 }
    100 
    101 AutoJavaShortArray::AutoJavaShortArray(JNIEnv* env, jshortArray array,
    102                                        int minLength, JNIAccess access)
    103 : fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
    104     SkASSERT(env);
    105     if (array) {
    106         fLen = env->GetArrayLength(array);
    107         if (fLen < minLength) {
    108             sk_throw();
    109         }
    110         fPtr = env->GetShortArrayElements(array, NULL);
    111     }
    112     fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0;
    113 }
    114 
    115 AutoJavaShortArray::~AutoJavaShortArray() {
    116     if (fPtr) {
    117         fEnv->ReleaseShortArrayElements(fArray, fPtr, fReleaseMode);
    118     }
    119 }
    120 
    121 AutoJavaByteArray::AutoJavaByteArray(JNIEnv* env, jbyteArray array,
    122                                        int minLength)
    123 : fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
    124     SkASSERT(env);
    125     if (array) {
    126         fLen = env->GetArrayLength(array);
    127         if (fLen < minLength) {
    128             sk_throw();
    129         }
    130         fPtr = env->GetByteArrayElements(array, NULL);
    131     }
    132 }
    133 
    134 AutoJavaByteArray::~AutoJavaByteArray() {
    135     if (fPtr) {
    136         fEnv->ReleaseByteArrayElements(fArray, fPtr, 0);
    137     }
    138 }
    139 
    140 ///////////////////////////////////////////////////////////////////////////////
    141 
    142 static jclass   gRect_class;
    143 static jfieldID gRect_leftFieldID;
    144 static jfieldID gRect_topFieldID;
    145 static jfieldID gRect_rightFieldID;
    146 static jfieldID gRect_bottomFieldID;
    147 
    148 static jclass   gRectF_class;
    149 static jfieldID gRectF_leftFieldID;
    150 static jfieldID gRectF_topFieldID;
    151 static jfieldID gRectF_rightFieldID;
    152 static jfieldID gRectF_bottomFieldID;
    153 
    154 static jclass   gPoint_class;
    155 static jfieldID gPoint_xFieldID;
    156 static jfieldID gPoint_yFieldID;
    157 
    158 static jclass   gPointF_class;
    159 static jfieldID gPointF_xFieldID;
    160 static jfieldID gPointF_yFieldID;
    161 
    162 static jclass   gBitmapConfig_class;
    163 static jfieldID gBitmapConfig_nativeInstanceID;
    164 
    165 static jclass   gBitmapRegionDecoder_class;
    166 static jmethodID gBitmapRegionDecoder_constructorMethodID;
    167 
    168 static jclass   gCanvas_class;
    169 static jfieldID gCanvas_nativeInstanceID;
    170 
    171 static jclass   gPicture_class;
    172 static jfieldID gPicture_nativeInstanceID;
    173 
    174 static jclass   gRegion_class;
    175 static jfieldID gRegion_nativeInstanceID;
    176 static jmethodID gRegion_constructorMethodID;
    177 
    178 static jclass    gByte_class;
    179 static jobject   gVMRuntime;
    180 static jclass    gVMRuntime_class;
    181 static jmethodID gVMRuntime_newNonMovableArray;
    182 static jmethodID gVMRuntime_addressOf;
    183 
    184 static jfieldID gTransferParams_aFieldID;
    185 static jfieldID gTransferParams_bFieldID;
    186 static jfieldID gTransferParams_cFieldID;
    187 static jfieldID gTransferParams_dFieldID;
    188 static jfieldID gTransferParams_eFieldID;
    189 static jfieldID gTransferParams_fFieldID;
    190 static jfieldID gTransferParams_gFieldID;
    191 
    192 static jclass gColorSpace_class;
    193 static jfieldID gColorSpace_IlluminantD50FieldID;
    194 static jmethodID gColorSpace_adaptMethodID;
    195 static jmethodID gColorSpace_getMethodID;
    196 static jmethodID gColorSpace_matchMethodID;
    197 
    198 static jclass gColorSpaceRGB_class;
    199 static jmethodID gColorSpaceRGB_getTransferParametersMethodID;
    200 static jmethodID gColorSpaceRGB_getTransformMethodID;
    201 static jmethodID gColorSpaceRGB_constructorMethodID;
    202 
    203 static jclass gColorSpace_Named_class;
    204 static jfieldID gColorSpace_Named_sRGBFieldID;
    205 static jfieldID gColorSpace_Named_LinearExtendedSRGBFieldID;
    206 
    207 static jclass gTransferParameters_class;
    208 static jmethodID gTransferParameters_constructorMethodID;
    209 
    210 ///////////////////////////////////////////////////////////////////////////////
    211 
    212 void GraphicsJNI::get_jrect(JNIEnv* env, jobject obj, int* L, int* T, int* R, int* B)
    213 {
    214     SkASSERT(env->IsInstanceOf(obj, gRect_class));
    215 
    216     *L = env->GetIntField(obj, gRect_leftFieldID);
    217     *T = env->GetIntField(obj, gRect_topFieldID);
    218     *R = env->GetIntField(obj, gRect_rightFieldID);
    219     *B = env->GetIntField(obj, gRect_bottomFieldID);
    220 }
    221 
    222 void GraphicsJNI::set_jrect(JNIEnv* env, jobject obj, int L, int T, int R, int B)
    223 {
    224     SkASSERT(env->IsInstanceOf(obj, gRect_class));
    225 
    226     env->SetIntField(obj, gRect_leftFieldID, L);
    227     env->SetIntField(obj, gRect_topFieldID, T);
    228     env->SetIntField(obj, gRect_rightFieldID, R);
    229     env->SetIntField(obj, gRect_bottomFieldID, B);
    230 }
    231 
    232 SkIRect* GraphicsJNI::jrect_to_irect(JNIEnv* env, jobject obj, SkIRect* ir)
    233 {
    234     SkASSERT(env->IsInstanceOf(obj, gRect_class));
    235 
    236     ir->set(env->GetIntField(obj, gRect_leftFieldID),
    237             env->GetIntField(obj, gRect_topFieldID),
    238             env->GetIntField(obj, gRect_rightFieldID),
    239             env->GetIntField(obj, gRect_bottomFieldID));
    240     return ir;
    241 }
    242 
    243 void GraphicsJNI::irect_to_jrect(const SkIRect& ir, JNIEnv* env, jobject obj)
    244 {
    245     SkASSERT(env->IsInstanceOf(obj, gRect_class));
    246 
    247     env->SetIntField(obj, gRect_leftFieldID, ir.fLeft);
    248     env->SetIntField(obj, gRect_topFieldID, ir.fTop);
    249     env->SetIntField(obj, gRect_rightFieldID, ir.fRight);
    250     env->SetIntField(obj, gRect_bottomFieldID, ir.fBottom);
    251 }
    252 
    253 SkRect* GraphicsJNI::jrectf_to_rect(JNIEnv* env, jobject obj, SkRect* r)
    254 {
    255     SkASSERT(env->IsInstanceOf(obj, gRectF_class));
    256 
    257     r->set(env->GetFloatField(obj, gRectF_leftFieldID),
    258            env->GetFloatField(obj, gRectF_topFieldID),
    259            env->GetFloatField(obj, gRectF_rightFieldID),
    260            env->GetFloatField(obj, gRectF_bottomFieldID));
    261     return r;
    262 }
    263 
    264 SkRect* GraphicsJNI::jrect_to_rect(JNIEnv* env, jobject obj, SkRect* r)
    265 {
    266     SkASSERT(env->IsInstanceOf(obj, gRect_class));
    267 
    268     r->set(SkIntToScalar(env->GetIntField(obj, gRect_leftFieldID)),
    269            SkIntToScalar(env->GetIntField(obj, gRect_topFieldID)),
    270            SkIntToScalar(env->GetIntField(obj, gRect_rightFieldID)),
    271            SkIntToScalar(env->GetIntField(obj, gRect_bottomFieldID)));
    272     return r;
    273 }
    274 
    275 void GraphicsJNI::rect_to_jrectf(const SkRect& r, JNIEnv* env, jobject obj)
    276 {
    277     SkASSERT(env->IsInstanceOf(obj, gRectF_class));
    278 
    279     env->SetFloatField(obj, gRectF_leftFieldID, SkScalarToFloat(r.fLeft));
    280     env->SetFloatField(obj, gRectF_topFieldID, SkScalarToFloat(r.fTop));
    281     env->SetFloatField(obj, gRectF_rightFieldID, SkScalarToFloat(r.fRight));
    282     env->SetFloatField(obj, gRectF_bottomFieldID, SkScalarToFloat(r.fBottom));
    283 }
    284 
    285 SkIPoint* GraphicsJNI::jpoint_to_ipoint(JNIEnv* env, jobject obj, SkIPoint* point)
    286 {
    287     SkASSERT(env->IsInstanceOf(obj, gPoint_class));
    288 
    289     point->set(env->GetIntField(obj, gPoint_xFieldID),
    290                env->GetIntField(obj, gPoint_yFieldID));
    291     return point;
    292 }
    293 
    294 void GraphicsJNI::ipoint_to_jpoint(const SkIPoint& ir, JNIEnv* env, jobject obj)
    295 {
    296     SkASSERT(env->IsInstanceOf(obj, gPoint_class));
    297 
    298     env->SetIntField(obj, gPoint_xFieldID, ir.fX);
    299     env->SetIntField(obj, gPoint_yFieldID, ir.fY);
    300 }
    301 
    302 SkPoint* GraphicsJNI::jpointf_to_point(JNIEnv* env, jobject obj, SkPoint* point)
    303 {
    304     SkASSERT(env->IsInstanceOf(obj, gPointF_class));
    305 
    306     point->set(env->GetIntField(obj, gPointF_xFieldID),
    307                env->GetIntField(obj, gPointF_yFieldID));
    308     return point;
    309 }
    310 
    311 void GraphicsJNI::point_to_jpointf(const SkPoint& r, JNIEnv* env, jobject obj)
    312 {
    313     SkASSERT(env->IsInstanceOf(obj, gPointF_class));
    314 
    315     env->SetFloatField(obj, gPointF_xFieldID, SkScalarToFloat(r.fX));
    316     env->SetFloatField(obj, gPointF_yFieldID, SkScalarToFloat(r.fY));
    317 }
    318 
    319 // See enum values in GraphicsJNI.h
    320 jint GraphicsJNI::colorTypeToLegacyBitmapConfig(SkColorType colorType) {
    321     switch (colorType) {
    322         case kRGBA_F16_SkColorType:
    323             return kRGBA_16F_LegacyBitmapConfig;
    324         case kN32_SkColorType:
    325             return kARGB_8888_LegacyBitmapConfig;
    326         case kARGB_4444_SkColorType:
    327             return kARGB_4444_LegacyBitmapConfig;
    328         case kRGB_565_SkColorType:
    329             return kRGB_565_LegacyBitmapConfig;
    330         case kIndex_8_SkColorType:
    331             return kIndex8_LegacyBitmapConfig;
    332         case kAlpha_8_SkColorType:
    333             return kA8_LegacyBitmapConfig;
    334         case kUnknown_SkColorType:
    335         default:
    336             break;
    337     }
    338     return kNo_LegacyBitmapConfig;
    339 }
    340 
    341 SkColorType GraphicsJNI::legacyBitmapConfigToColorType(jint legacyConfig) {
    342     const uint8_t gConfig2ColorType[] = {
    343         kUnknown_SkColorType,
    344         kAlpha_8_SkColorType,
    345         kIndex_8_SkColorType,
    346         kRGB_565_SkColorType,
    347         kARGB_4444_SkColorType,
    348         kN32_SkColorType,
    349         kRGBA_F16_SkColorType,
    350         kN32_SkColorType
    351     };
    352 
    353     if (legacyConfig < 0 || legacyConfig > kLastEnum_LegacyBitmapConfig) {
    354         legacyConfig = kNo_LegacyBitmapConfig;
    355     }
    356     return static_cast<SkColorType>(gConfig2ColorType[legacyConfig]);
    357 }
    358 
    359 void GraphicsJNI::getSkBitmap(JNIEnv* env, jobject bitmap, SkBitmap* outBitmap) {
    360     bitmap::toBitmap(env, bitmap).getSkBitmap(outBitmap);
    361 }
    362 
    363 SkPixelRef* GraphicsJNI::refSkPixelRef(JNIEnv* env, jobject jbitmap) {
    364     android::Bitmap& bitmap = android::bitmap::toBitmap(env, jbitmap);
    365     bitmap.ref();
    366     return &bitmap;
    367 }
    368 SkColorType GraphicsJNI::getNativeBitmapColorType(JNIEnv* env, jobject jconfig) {
    369     SkASSERT(env);
    370     if (NULL == jconfig) {
    371         return kUnknown_SkColorType;
    372     }
    373     SkASSERT(env->IsInstanceOf(jconfig, gBitmapConfig_class));
    374     int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID);
    375     return legacyBitmapConfigToColorType(c);
    376 }
    377 
    378 bool GraphicsJNI::isHardwareConfig(JNIEnv* env, jobject jconfig) {
    379     SkASSERT(env);
    380     if (NULL == jconfig) {
    381         return false;
    382     }
    383     int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID);
    384     return c == kHardware_LegacyBitmapConfig;
    385 }
    386 
    387 jint GraphicsJNI::hardwareLegacyBitmapConfig() {
    388     return kHardware_LegacyBitmapConfig;
    389 }
    390 
    391 android::Canvas* GraphicsJNI::getNativeCanvas(JNIEnv* env, jobject canvas) {
    392     SkASSERT(env);
    393     SkASSERT(canvas);
    394     SkASSERT(env->IsInstanceOf(canvas, gCanvas_class));
    395     jlong canvasHandle = env->GetLongField(canvas, gCanvas_nativeInstanceID);
    396     if (!canvasHandle) {
    397         return NULL;
    398     }
    399     return reinterpret_cast<android::Canvas*>(canvasHandle);
    400 }
    401 
    402 SkRegion* GraphicsJNI::getNativeRegion(JNIEnv* env, jobject region)
    403 {
    404     SkASSERT(env);
    405     SkASSERT(region);
    406     SkASSERT(env->IsInstanceOf(region, gRegion_class));
    407     jlong regionHandle = env->GetLongField(region, gRegion_nativeInstanceID);
    408     SkRegion* r = reinterpret_cast<SkRegion*>(regionHandle);
    409     SkASSERT(r);
    410     return r;
    411 }
    412 
    413 ///////////////////////////////////////////////////////////////////////////////////////////
    414 
    415 jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap)
    416 {
    417     SkASSERT(bitmap != NULL);
    418 
    419     jobject obj = env->NewObject(gBitmapRegionDecoder_class,
    420             gBitmapRegionDecoder_constructorMethodID,
    421             reinterpret_cast<jlong>(bitmap));
    422     hasException(env); // For the side effect of logging.
    423     return obj;
    424 }
    425 
    426 jobject GraphicsJNI::createRegion(JNIEnv* env, SkRegion* region)
    427 {
    428     SkASSERT(region != NULL);
    429     jobject obj = env->NewObject(gRegion_class, gRegion_constructorMethodID,
    430                                  reinterpret_cast<jlong>(region), 0);
    431     hasException(env); // For the side effect of logging.
    432     return obj;
    433 }
    434 
    435 ///////////////////////////////////////////////////////////////////////////////
    436 
    437 android::Bitmap* GraphicsJNI::mapAshmemBitmap(JNIEnv* env, SkBitmap* bitmap,
    438         SkColorTable* ctable, int fd, void* addr, size_t size, bool readOnly) {
    439     const SkImageInfo& info = bitmap->info();
    440     if (info.colorType() == kUnknown_SkColorType) {
    441         doThrowIAE(env, "unknown bitmap configuration");
    442         return nullptr;
    443     }
    444 
    445     if (!addr) {
    446         // Map existing ashmem region if not already mapped.
    447         int flags = readOnly ? (PROT_READ) : (PROT_READ | PROT_WRITE);
    448         size = ashmem_get_size_region(fd);
    449         addr = mmap(NULL, size, flags, MAP_SHARED, fd, 0);
    450         if (addr == MAP_FAILED) {
    451             return nullptr;
    452         }
    453     }
    454 
    455     // we must respect the rowBytes value already set on the bitmap instead of
    456     // attempting to compute our own.
    457     const size_t rowBytes = bitmap->rowBytes();
    458 
    459     auto wrapper = new android::Bitmap(addr, fd, size, info, rowBytes, ctable);
    460     wrapper->getSkBitmap(bitmap);
    461     if (readOnly) {
    462         bitmap->pixelRef()->setImmutable();
    463     }
    464     // since we're already allocated, we lockPixels right away
    465     // HeapAllocator behaves this way too
    466     bitmap->lockPixels();
    467 
    468     return wrapper;
    469 }
    470 
    471 sk_sp<SkColorSpace> GraphicsJNI::defaultColorSpace() {
    472 #ifdef ANDROID_ENABLE_LINEAR_BLENDING
    473     return SkColorSpace::MakeSRGB();
    474 #else
    475     return nullptr;
    476 #endif
    477 }
    478 
    479 sk_sp<SkColorSpace> GraphicsJNI::linearColorSpace() {
    480     return SkColorSpace::MakeSRGBLinear();
    481 }
    482 
    483 sk_sp<SkColorSpace> GraphicsJNI::colorSpaceForType(SkColorType type) {
    484     switch (type) {
    485         case kRGBA_F16_SkColorType:
    486             return linearColorSpace();
    487         default:
    488             return defaultColorSpace();
    489     }
    490 }
    491 
    492 bool GraphicsJNI::isColorSpaceSRGB(SkColorSpace* colorSpace) {
    493     return colorSpace == nullptr || colorSpace->isSRGB();
    494 }
    495 
    496 SkColorSpaceTransferFn GraphicsJNI::getNativeTransferParameters(JNIEnv* env, jobject transferParams) {
    497     SkColorSpaceTransferFn p;
    498     p.fA = (float) env->GetDoubleField(transferParams, gTransferParams_aFieldID);
    499     p.fB = (float) env->GetDoubleField(transferParams, gTransferParams_bFieldID);
    500     p.fC = (float) env->GetDoubleField(transferParams, gTransferParams_cFieldID);
    501     p.fD = (float) env->GetDoubleField(transferParams, gTransferParams_dFieldID);
    502     p.fE = (float) env->GetDoubleField(transferParams, gTransferParams_eFieldID);
    503     p.fF = (float) env->GetDoubleField(transferParams, gTransferParams_fFieldID);
    504     p.fG = (float) env->GetDoubleField(transferParams, gTransferParams_gFieldID);
    505     return p;
    506 }
    507 
    508 SkMatrix44 GraphicsJNI::getNativeXYZMatrix(JNIEnv* env, jfloatArray xyzD50) {
    509     SkMatrix44 xyzMatrix(SkMatrix44::kIdentity_Constructor);
    510     jfloat* array = env->GetFloatArrayElements(xyzD50, NULL);
    511     xyzMatrix.setFloat(0, 0, array[0]);
    512     xyzMatrix.setFloat(1, 0, array[1]);
    513     xyzMatrix.setFloat(2, 0, array[2]);
    514     xyzMatrix.setFloat(0, 1, array[3]);
    515     xyzMatrix.setFloat(1, 1, array[4]);
    516     xyzMatrix.setFloat(2, 1, array[5]);
    517     xyzMatrix.setFloat(0, 2, array[6]);
    518     xyzMatrix.setFloat(1, 2, array[7]);
    519     xyzMatrix.setFloat(2, 2, array[8]);
    520     env->ReleaseFloatArrayElements(xyzD50, array, 0);
    521     return xyzMatrix;
    522 }
    523 
    524 sk_sp<SkColorSpace> GraphicsJNI::getNativeColorSpace(JNIEnv* env, jobject colorSpace) {
    525     if (colorSpace == nullptr) return nullptr;
    526     if (!env->IsInstanceOf(colorSpace, gColorSpaceRGB_class)) {
    527         doThrowIAE(env, "The color space must be an RGB color space");
    528     }
    529 
    530     jobject transferParams = env->CallObjectMethod(colorSpace,
    531             gColorSpaceRGB_getTransferParametersMethodID);
    532     if (transferParams == nullptr) {
    533         doThrowIAE(env, "The color space must use an ICC parametric transfer function");
    534     }
    535 
    536     jfloatArray illuminantD50 = (jfloatArray) env->GetStaticObjectField(gColorSpace_class,
    537             gColorSpace_IlluminantD50FieldID);
    538     jobject colorSpaceD50 = env->CallStaticObjectMethod(gColorSpace_class,
    539             gColorSpace_adaptMethodID, colorSpace, illuminantD50);
    540 
    541     jfloatArray xyzD50 = (jfloatArray) env->CallObjectMethod(colorSpaceD50,
    542             gColorSpaceRGB_getTransformMethodID);
    543 
    544     SkMatrix44 xyzMatrix = getNativeXYZMatrix(env, xyzD50);
    545     SkColorSpaceTransferFn transferFunction = getNativeTransferParameters(env, transferParams);
    546 
    547     return SkColorSpace::MakeRGB(transferFunction, xyzMatrix);
    548 }
    549 
    550 
    551 jobject GraphicsJNI::getColorSpace(JNIEnv* env, sk_sp<SkColorSpace>& decodeColorSpace,
    552         SkColorType decodeColorType) {
    553     jobject colorSpace = nullptr;
    554 
    555     // No need to match, we know what the output color space will be
    556     if (decodeColorType == kRGBA_F16_SkColorType) {
    557         jobject linearExtendedSRGB = env->GetStaticObjectField(
    558                 gColorSpace_Named_class, gColorSpace_Named_LinearExtendedSRGBFieldID);
    559         colorSpace = env->CallStaticObjectMethod(gColorSpace_class,
    560                 gColorSpace_getMethodID, linearExtendedSRGB);
    561     } else {
    562         // Same here, no need to match
    563         if (decodeColorSpace->isSRGB()) {
    564             jobject sRGB = env->GetStaticObjectField(
    565                     gColorSpace_Named_class, gColorSpace_Named_sRGBFieldID);
    566             colorSpace = env->CallStaticObjectMethod(gColorSpace_class,
    567                     gColorSpace_getMethodID, sRGB);
    568         } else if (decodeColorSpace.get() != nullptr) {
    569             // Try to match against known RGB color spaces using the CIE XYZ D50
    570             // conversion matrix and numerical transfer function parameters
    571             SkMatrix44 xyzMatrix(SkMatrix44::kUninitialized_Constructor);
    572             LOG_ALWAYS_FATAL_IF(!decodeColorSpace->toXYZD50(&xyzMatrix));
    573 
    574             SkColorSpaceTransferFn transferParams;
    575             // We can only handle numerical transfer functions at the moment
    576             LOG_ALWAYS_FATAL_IF(!decodeColorSpace->isNumericalTransferFn(&transferParams));
    577 
    578             jobject params = env->NewObject(gTransferParameters_class,
    579                     gTransferParameters_constructorMethodID,
    580                     transferParams.fA, transferParams.fB, transferParams.fC,
    581                     transferParams.fD, transferParams.fE, transferParams.fF,
    582                     transferParams.fG);
    583 
    584             jfloatArray xyzArray = env->NewFloatArray(9);
    585             jfloat xyz[9] = {
    586                     xyzMatrix.getFloat(0, 0),
    587                     xyzMatrix.getFloat(1, 0),
    588                     xyzMatrix.getFloat(2, 0),
    589                     xyzMatrix.getFloat(0, 1),
    590                     xyzMatrix.getFloat(1, 1),
    591                     xyzMatrix.getFloat(2, 1),
    592                     xyzMatrix.getFloat(0, 2),
    593                     xyzMatrix.getFloat(1, 2),
    594                     xyzMatrix.getFloat(2, 2)
    595             };
    596             env->SetFloatArrayRegion(xyzArray, 0, 9, xyz);
    597 
    598             colorSpace = env->CallStaticObjectMethod(gColorSpace_class,
    599                     gColorSpace_matchMethodID, xyzArray, params);
    600 
    601             if (colorSpace == nullptr) {
    602                 // We couldn't find an exact match, let's create a new color space
    603                 // instance with the 3x3 conversion matrix and transfer function
    604                 colorSpace = env->NewObject(gColorSpaceRGB_class,
    605                         gColorSpaceRGB_constructorMethodID,
    606                         env->NewStringUTF("Unknown"), xyzArray, params);
    607             }
    608 
    609             env->DeleteLocalRef(xyzArray);
    610         }
    611     }
    612     return colorSpace;
    613 }
    614 
    615 ///////////////////////////////////////////////////////////////////////////////
    616 bool HeapAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
    617     mStorage = android::Bitmap::allocateHeapBitmap(bitmap, ctable);
    618     return !!mStorage;
    619 }
    620 
    621 ////////////////////////////////////////////////////////////////////////////////
    622 
    623 RecyclingClippingPixelAllocator::RecyclingClippingPixelAllocator(
    624         android::Bitmap* recycledBitmap, size_t recycledBytes)
    625     : mRecycledBitmap(recycledBitmap)
    626     , mRecycledBytes(recycledBytes)
    627     , mSkiaBitmap(nullptr)
    628     , mNeedsCopy(false)
    629 {}
    630 
    631 RecyclingClippingPixelAllocator::~RecyclingClippingPixelAllocator() {}
    632 
    633 bool RecyclingClippingPixelAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
    634     // Ensure that the caller did not pass in a NULL bitmap to the constructor or this
    635     // function.
    636     LOG_ALWAYS_FATAL_IF(!mRecycledBitmap);
    637     LOG_ALWAYS_FATAL_IF(!bitmap);
    638     mSkiaBitmap = bitmap;
    639 
    640     // This behaves differently than the RecyclingPixelAllocator.  For backwards
    641     // compatibility, the original color type of the recycled bitmap must be maintained.
    642     if (mRecycledBitmap->info().colorType() != bitmap->colorType()) {
    643         return false;
    644     }
    645 
    646     // The Skia bitmap specifies the width and height needed by the decoder.
    647     // mRecycledBitmap specifies the width and height of the bitmap that we
    648     // want to reuse.  Neither can be changed.  We will try to find a way
    649     // to reuse the memory.
    650     const int maxWidth = SkTMax(bitmap->width(), mRecycledBitmap->info().width());
    651     const int maxHeight = SkTMax(bitmap->height(), mRecycledBitmap->info().height());
    652     const SkImageInfo maxInfo = bitmap->info().makeWH(maxWidth, maxHeight);
    653     const size_t rowBytes = maxInfo.minRowBytes();
    654     const size_t bytesNeeded = maxInfo.getSafeSize(rowBytes);
    655     if (bytesNeeded <= mRecycledBytes) {
    656         // Here we take advantage of reconfigure() to reset the rowBytes and ctable
    657         // of mRecycledBitmap.  It is very important that we pass in
    658         // mRecycledBitmap->info() for the SkImageInfo.  According to the
    659         // specification for BitmapRegionDecoder, we are not allowed to change
    660         // the SkImageInfo.
    661         // We can (must) preserve the color space since it doesn't affect the
    662         // storage needs
    663         mRecycledBitmap->reconfigure(
    664                 mRecycledBitmap->info().makeColorSpace(bitmap->refColorSpace()),
    665                 rowBytes, ctable);
    666 
    667         // Give the bitmap the same pixelRef as mRecycledBitmap.
    668         // skbug.com/4538: We also need to make sure that the rowBytes on the pixel ref
    669         //                 match the rowBytes on the bitmap.
    670         bitmap->setInfo(bitmap->info(), rowBytes);
    671         mRecycledBitmap->ref();
    672         bitmap->setPixelRef(mRecycledBitmap)->unref();
    673 
    674         // Make sure that the recycled bitmap has the correct alpha type.
    675         mRecycledBitmap->setAlphaType(bitmap->alphaType());
    676 
    677         bitmap->notifyPixelsChanged();
    678         bitmap->lockPixels();
    679         mNeedsCopy = false;
    680 
    681         // TODO: If the dimensions of the SkBitmap are smaller than those of
    682         // mRecycledBitmap, should we zero the memory in mRecycledBitmap?
    683         return true;
    684     }
    685 
    686     // In the event that mRecycledBitmap is not large enough, allocate new memory
    687     // on the heap.
    688     SkBitmap::HeapAllocator heapAllocator;
    689 
    690     // We will need to copy from heap memory to mRecycledBitmap's memory after the
    691     // decode is complete.
    692     mNeedsCopy = true;
    693 
    694     return heapAllocator.allocPixelRef(bitmap, ctable);
    695 }
    696 
    697 void RecyclingClippingPixelAllocator::copyIfNecessary() {
    698     if (mNeedsCopy) {
    699         mRecycledBitmap->ref();
    700         SkPixelRef* recycledPixels = mRecycledBitmap;
    701         void* dst = recycledPixels->pixels();
    702         const size_t dstRowBytes = mRecycledBitmap->rowBytes();
    703         const size_t bytesToCopy = std::min(mRecycledBitmap->info().minRowBytes(),
    704                 mSkiaBitmap->info().minRowBytes());
    705         const int rowsToCopy = std::min(mRecycledBitmap->info().height(),
    706                 mSkiaBitmap->info().height());
    707         for (int y = 0; y < rowsToCopy; y++) {
    708             memcpy(dst, mSkiaBitmap->getAddr(0, y), bytesToCopy);
    709             dst = SkTAddOffset<void>(dst, dstRowBytes);
    710         }
    711         recycledPixels->notifyPixelsChanged();
    712         recycledPixels->unref();
    713     }
    714     mRecycledBitmap = nullptr;
    715     mSkiaBitmap = nullptr;
    716 }
    717 
    718 ////////////////////////////////////////////////////////////////////////////////
    719 
    720 AshmemPixelAllocator::AshmemPixelAllocator(JNIEnv *env) {
    721     LOG_ALWAYS_FATAL_IF(env->GetJavaVM(&mJavaVM) != JNI_OK,
    722             "env->GetJavaVM failed");
    723 }
    724 
    725 bool AshmemPixelAllocator::allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) {
    726     mStorage = android::Bitmap::allocateAshmemBitmap(bitmap, ctable);
    727     return !!mStorage;
    728 }
    729 
    730 ////////////////////////////////////////////////////////////////////////////////
    731 
    732 int register_android_graphics_Graphics(JNIEnv* env)
    733 {
    734     jmethodID m;
    735     jclass c;
    736 
    737     gRect_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Rect"));
    738     gRect_leftFieldID = GetFieldIDOrDie(env, gRect_class, "left", "I");
    739     gRect_topFieldID = GetFieldIDOrDie(env, gRect_class, "top", "I");
    740     gRect_rightFieldID = GetFieldIDOrDie(env, gRect_class, "right", "I");
    741     gRect_bottomFieldID = GetFieldIDOrDie(env, gRect_class, "bottom", "I");
    742 
    743     gRectF_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/RectF"));
    744     gRectF_leftFieldID = GetFieldIDOrDie(env, gRectF_class, "left", "F");
    745     gRectF_topFieldID = GetFieldIDOrDie(env, gRectF_class, "top", "F");
    746     gRectF_rightFieldID = GetFieldIDOrDie(env, gRectF_class, "right", "F");
    747     gRectF_bottomFieldID = GetFieldIDOrDie(env, gRectF_class, "bottom", "F");
    748 
    749     gPoint_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Point"));
    750     gPoint_xFieldID = GetFieldIDOrDie(env, gPoint_class, "x", "I");
    751     gPoint_yFieldID = GetFieldIDOrDie(env, gPoint_class, "y", "I");
    752 
    753     gPointF_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/PointF"));
    754     gPointF_xFieldID = GetFieldIDOrDie(env, gPointF_class, "x", "F");
    755     gPointF_yFieldID = GetFieldIDOrDie(env, gPointF_class, "y", "F");
    756 
    757     gBitmapRegionDecoder_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/BitmapRegionDecoder"));
    758     gBitmapRegionDecoder_constructorMethodID = GetMethodIDOrDie(env, gBitmapRegionDecoder_class, "<init>", "(J)V");
    759 
    760     gBitmapConfig_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Bitmap$Config"));
    761     gBitmapConfig_nativeInstanceID = GetFieldIDOrDie(env, gBitmapConfig_class, "nativeInt", "I");
    762 
    763     gCanvas_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Canvas"));
    764     gCanvas_nativeInstanceID = GetFieldIDOrDie(env, gCanvas_class, "mNativeCanvasWrapper", "J");
    765 
    766     gPicture_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Picture"));
    767     gPicture_nativeInstanceID = GetFieldIDOrDie(env, gPicture_class, "mNativePicture", "J");
    768 
    769     gRegion_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Region"));
    770     gRegion_nativeInstanceID = GetFieldIDOrDie(env, gRegion_class, "mNativeRegion", "J");
    771     gRegion_constructorMethodID = GetMethodIDOrDie(env, gRegion_class, "<init>", "(JI)V");
    772 
    773     c = env->FindClass("java/lang/Byte");
    774     gByte_class = (jclass) env->NewGlobalRef(
    775         env->GetStaticObjectField(c, env->GetStaticFieldID(c, "TYPE", "Ljava/lang/Class;")));
    776 
    777     gVMRuntime_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "dalvik/system/VMRuntime"));
    778     m = env->GetStaticMethodID(gVMRuntime_class, "getRuntime", "()Ldalvik/system/VMRuntime;");
    779     gVMRuntime = env->NewGlobalRef(env->CallStaticObjectMethod(gVMRuntime_class, m));
    780     gVMRuntime_newNonMovableArray = GetMethodIDOrDie(env, gVMRuntime_class, "newNonMovableArray",
    781                                                      "(Ljava/lang/Class;I)Ljava/lang/Object;");
    782     gVMRuntime_addressOf = GetMethodIDOrDie(env, gVMRuntime_class, "addressOf", "(Ljava/lang/Object;)J");
    783 
    784     jclass transfer_params_class = FindClassOrDie(env, "android/graphics/ColorSpace$Rgb$TransferParameters");
    785     gTransferParams_aFieldID = GetFieldIDOrDie(env, transfer_params_class, "a", "D");
    786     gTransferParams_bFieldID = GetFieldIDOrDie(env, transfer_params_class, "b", "D");
    787     gTransferParams_cFieldID = GetFieldIDOrDie(env, transfer_params_class, "c", "D");
    788     gTransferParams_dFieldID = GetFieldIDOrDie(env, transfer_params_class, "d", "D");
    789     gTransferParams_eFieldID = GetFieldIDOrDie(env, transfer_params_class, "e", "D");
    790     gTransferParams_fFieldID = GetFieldIDOrDie(env, transfer_params_class, "f", "D");
    791     gTransferParams_gFieldID = GetFieldIDOrDie(env, transfer_params_class, "g", "D");
    792 
    793     gColorSpace_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/ColorSpace"));
    794     gColorSpace_IlluminantD50FieldID = GetStaticFieldIDOrDie(env,
    795             gColorSpace_class, "ILLUMINANT_D50", "[F");
    796     gColorSpace_adaptMethodID = GetStaticMethodIDOrDie(env, gColorSpace_class, "adapt",
    797             "(Landroid/graphics/ColorSpace;[F)Landroid/graphics/ColorSpace;");
    798     gColorSpace_getMethodID = GetStaticMethodIDOrDie(env, gColorSpace_class,
    799             "get", "(Landroid/graphics/ColorSpace$Named;)Landroid/graphics/ColorSpace;");
    800     gColorSpace_matchMethodID = GetStaticMethodIDOrDie(env, gColorSpace_class, "match",
    801             "([FLandroid/graphics/ColorSpace$Rgb$TransferParameters;)Landroid/graphics/ColorSpace;");
    802 
    803     gColorSpaceRGB_class = MakeGlobalRefOrDie(env,
    804             FindClassOrDie(env, "android/graphics/ColorSpace$Rgb"));
    805     gColorSpaceRGB_constructorMethodID = GetMethodIDOrDie(env, gColorSpaceRGB_class,
    806             "<init>", "(Ljava/lang/String;[FLandroid/graphics/ColorSpace$Rgb$TransferParameters;)V");
    807     gColorSpaceRGB_getTransferParametersMethodID = GetMethodIDOrDie(env, gColorSpaceRGB_class,
    808             "getTransferParameters", "()Landroid/graphics/ColorSpace$Rgb$TransferParameters;");
    809     gColorSpaceRGB_getTransformMethodID = GetMethodIDOrDie(env, gColorSpaceRGB_class,
    810             "getTransform", "()[F");
    811 
    812     gColorSpace_Named_class = MakeGlobalRefOrDie(env,
    813             FindClassOrDie(env, "android/graphics/ColorSpace$Named"));
    814     gColorSpace_Named_sRGBFieldID = GetStaticFieldIDOrDie(env,
    815             gColorSpace_Named_class, "SRGB", "Landroid/graphics/ColorSpace$Named;");
    816     gColorSpace_Named_LinearExtendedSRGBFieldID = GetStaticFieldIDOrDie(env,
    817             gColorSpace_Named_class, "LINEAR_EXTENDED_SRGB", "Landroid/graphics/ColorSpace$Named;");
    818 
    819     gTransferParameters_class = MakeGlobalRefOrDie(env, FindClassOrDie(env,
    820             "android/graphics/ColorSpace$Rgb$TransferParameters"));
    821     gTransferParameters_constructorMethodID = GetMethodIDOrDie(env, gTransferParameters_class,
    822             "<init>", "(DDDDDDD)V");
    823 
    824     return 0;
    825 }
    826