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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 <nativehelper/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     ALOG_ASSERT(env);
     66     if (array) {
     67         fLen = env->GetArrayLength(array);
     68         if (fLen < minLength) {
     69             LOG_ALWAYS_FATAL("bad length");
     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     ALOG_ASSERT(env);
     86     if (array) {
     87         fLen = env->GetArrayLength(array);
     88         if (fLen < minLength) {
     89             LOG_ALWAYS_FATAL("bad length");
     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     ALOG_ASSERT(env);
    105     if (array) {
    106         fLen = env->GetArrayLength(array);
    107         if (fLen < minLength) {
    108             LOG_ALWAYS_FATAL("bad length");
    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     ALOG_ASSERT(env);
    125     if (array) {
    126         fLen = env->GetArrayLength(array);
    127         if (fLen < minLength) {
    128             LOG_ALWAYS_FATAL("bad length");
    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     ALOG_ASSERT(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     ALOG_ASSERT(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     ALOG_ASSERT(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     ALOG_ASSERT(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     ALOG_ASSERT(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     ALOG_ASSERT(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     ALOG_ASSERT(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     ALOG_ASSERT(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     ALOG_ASSERT(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     ALOG_ASSERT(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     ALOG_ASSERT(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 kAlpha_8_SkColorType:
    331             return kA8_LegacyBitmapConfig;
    332         case kUnknown_SkColorType:
    333         default:
    334             break;
    335     }
    336     return kNo_LegacyBitmapConfig;
    337 }
    338 
    339 SkColorType GraphicsJNI::legacyBitmapConfigToColorType(jint legacyConfig) {
    340     const uint8_t gConfig2ColorType[] = {
    341         kUnknown_SkColorType,
    342         kAlpha_8_SkColorType,
    343         kUnknown_SkColorType, // Previously kIndex_8_SkColorType,
    344         kRGB_565_SkColorType,
    345         kARGB_4444_SkColorType,
    346         kN32_SkColorType,
    347         kRGBA_F16_SkColorType,
    348         kN32_SkColorType
    349     };
    350 
    351     if (legacyConfig < 0 || legacyConfig > kLastEnum_LegacyBitmapConfig) {
    352         legacyConfig = kNo_LegacyBitmapConfig;
    353     }
    354     return static_cast<SkColorType>(gConfig2ColorType[legacyConfig]);
    355 }
    356 
    357 void GraphicsJNI::getSkBitmap(JNIEnv* env, jobject bitmap, SkBitmap* outBitmap) {
    358     bitmap::toBitmap(env, bitmap).getSkBitmap(outBitmap);
    359 }
    360 
    361 SkPixelRef* GraphicsJNI::refSkPixelRef(JNIEnv* env, jobject jbitmap) {
    362     android::Bitmap& bitmap = android::bitmap::toBitmap(env, jbitmap);
    363     bitmap.ref();
    364     return &bitmap;
    365 }
    366 SkColorType GraphicsJNI::getNativeBitmapColorType(JNIEnv* env, jobject jconfig) {
    367     ALOG_ASSERT(env);
    368     if (NULL == jconfig) {
    369         return kUnknown_SkColorType;
    370     }
    371     ALOG_ASSERT(env->IsInstanceOf(jconfig, gBitmapConfig_class));
    372     int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID);
    373     return legacyBitmapConfigToColorType(c);
    374 }
    375 
    376 bool GraphicsJNI::isHardwareConfig(JNIEnv* env, jobject jconfig) {
    377     ALOG_ASSERT(env);
    378     if (NULL == jconfig) {
    379         return false;
    380     }
    381     int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID);
    382     return c == kHardware_LegacyBitmapConfig;
    383 }
    384 
    385 jint GraphicsJNI::hardwareLegacyBitmapConfig() {
    386     return kHardware_LegacyBitmapConfig;
    387 }
    388 
    389 android::Canvas* GraphicsJNI::getNativeCanvas(JNIEnv* env, jobject canvas) {
    390     ALOG_ASSERT(env);
    391     ALOG_ASSERT(canvas);
    392     ALOG_ASSERT(env->IsInstanceOf(canvas, gCanvas_class));
    393     jlong canvasHandle = env->GetLongField(canvas, gCanvas_nativeInstanceID);
    394     if (!canvasHandle) {
    395         return NULL;
    396     }
    397     return reinterpret_cast<android::Canvas*>(canvasHandle);
    398 }
    399 
    400 SkRegion* GraphicsJNI::getNativeRegion(JNIEnv* env, jobject region)
    401 {
    402     ALOG_ASSERT(env);
    403     ALOG_ASSERT(region);
    404     ALOG_ASSERT(env->IsInstanceOf(region, gRegion_class));
    405     jlong regionHandle = env->GetLongField(region, gRegion_nativeInstanceID);
    406     SkRegion* r = reinterpret_cast<SkRegion*>(regionHandle);
    407     ALOG_ASSERT(r);
    408     return r;
    409 }
    410 
    411 ///////////////////////////////////////////////////////////////////////////////////////////
    412 
    413 jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap)
    414 {
    415     ALOG_ASSERT(bitmap != NULL);
    416 
    417     jobject obj = env->NewObject(gBitmapRegionDecoder_class,
    418             gBitmapRegionDecoder_constructorMethodID,
    419             reinterpret_cast<jlong>(bitmap));
    420     hasException(env); // For the side effect of logging.
    421     return obj;
    422 }
    423 
    424 jobject GraphicsJNI::createRegion(JNIEnv* env, SkRegion* region)
    425 {
    426     ALOG_ASSERT(region != NULL);
    427     jobject obj = env->NewObject(gRegion_class, gRegion_constructorMethodID,
    428                                  reinterpret_cast<jlong>(region), 0);
    429     hasException(env); // For the side effect of logging.
    430     return obj;
    431 }
    432 
    433 ///////////////////////////////////////////////////////////////////////////////
    434 
    435 android::Bitmap* GraphicsJNI::mapAshmemBitmap(JNIEnv* env, SkBitmap* bitmap,
    436         int fd, void* addr, size_t size, bool readOnly) {
    437     const SkImageInfo& info = bitmap->info();
    438     if (info.colorType() == kUnknown_SkColorType) {
    439         doThrowIAE(env, "unknown bitmap configuration");
    440         return nullptr;
    441     }
    442 
    443     if (!addr) {
    444         // Map existing ashmem region if not already mapped.
    445         int flags = readOnly ? (PROT_READ) : (PROT_READ | PROT_WRITE);
    446         size = ashmem_get_size_region(fd);
    447         addr = mmap(NULL, size, flags, MAP_SHARED, fd, 0);
    448         if (addr == MAP_FAILED) {
    449             return nullptr;
    450         }
    451     }
    452 
    453     // we must respect the rowBytes value already set on the bitmap instead of
    454     // attempting to compute our own.
    455     const size_t rowBytes = bitmap->rowBytes();
    456 
    457     auto wrapper = new android::Bitmap(addr, fd, size, info, rowBytes);
    458     wrapper->getSkBitmap(bitmap);
    459     if (readOnly) {
    460         bitmap->pixelRef()->setImmutable();
    461     }
    462     return wrapper;
    463 }
    464 
    465 sk_sp<SkColorSpace> GraphicsJNI::defaultColorSpace() {
    466 #ifdef ANDROID_ENABLE_LINEAR_BLENDING
    467     return SkColorSpace::MakeSRGB();
    468 #else
    469     return nullptr;
    470 #endif
    471 }
    472 
    473 sk_sp<SkColorSpace> GraphicsJNI::linearColorSpace() {
    474     return SkColorSpace::MakeSRGBLinear();
    475 }
    476 
    477 sk_sp<SkColorSpace> GraphicsJNI::colorSpaceForType(SkColorType type) {
    478     switch (type) {
    479         case kRGBA_F16_SkColorType:
    480             return linearColorSpace();
    481         default:
    482             return defaultColorSpace();
    483     }
    484 }
    485 
    486 bool GraphicsJNI::isColorSpaceSRGB(SkColorSpace* colorSpace) {
    487     return colorSpace == nullptr || colorSpace->isSRGB();
    488 }
    489 
    490 SkColorSpaceTransferFn GraphicsJNI::getNativeTransferParameters(JNIEnv* env, jobject transferParams) {
    491     SkColorSpaceTransferFn p;
    492     p.fA = (float) env->GetDoubleField(transferParams, gTransferParams_aFieldID);
    493     p.fB = (float) env->GetDoubleField(transferParams, gTransferParams_bFieldID);
    494     p.fC = (float) env->GetDoubleField(transferParams, gTransferParams_cFieldID);
    495     p.fD = (float) env->GetDoubleField(transferParams, gTransferParams_dFieldID);
    496     p.fE = (float) env->GetDoubleField(transferParams, gTransferParams_eFieldID);
    497     p.fF = (float) env->GetDoubleField(transferParams, gTransferParams_fFieldID);
    498     p.fG = (float) env->GetDoubleField(transferParams, gTransferParams_gFieldID);
    499     return p;
    500 }
    501 
    502 SkMatrix44 GraphicsJNI::getNativeXYZMatrix(JNIEnv* env, jfloatArray xyzD50) {
    503     SkMatrix44 xyzMatrix(SkMatrix44::kIdentity_Constructor);
    504     jfloat* array = env->GetFloatArrayElements(xyzD50, NULL);
    505     xyzMatrix.setFloat(0, 0, array[0]);
    506     xyzMatrix.setFloat(1, 0, array[1]);
    507     xyzMatrix.setFloat(2, 0, array[2]);
    508     xyzMatrix.setFloat(0, 1, array[3]);
    509     xyzMatrix.setFloat(1, 1, array[4]);
    510     xyzMatrix.setFloat(2, 1, array[5]);
    511     xyzMatrix.setFloat(0, 2, array[6]);
    512     xyzMatrix.setFloat(1, 2, array[7]);
    513     xyzMatrix.setFloat(2, 2, array[8]);
    514     env->ReleaseFloatArrayElements(xyzD50, array, 0);
    515     return xyzMatrix;
    516 }
    517 
    518 sk_sp<SkColorSpace> GraphicsJNI::getNativeColorSpace(JNIEnv* env, jobject colorSpace) {
    519     if (colorSpace == nullptr) return nullptr;
    520     if (!env->IsInstanceOf(colorSpace, gColorSpaceRGB_class)) {
    521         doThrowIAE(env, "The color space must be an RGB color space");
    522     }
    523 
    524     jobject transferParams = env->CallObjectMethod(colorSpace,
    525             gColorSpaceRGB_getTransferParametersMethodID);
    526     if (transferParams == nullptr) {
    527         doThrowIAE(env, "The color space must use an ICC parametric transfer function");
    528     }
    529 
    530     jfloatArray illuminantD50 = (jfloatArray) env->GetStaticObjectField(gColorSpace_class,
    531             gColorSpace_IlluminantD50FieldID);
    532     jobject colorSpaceD50 = env->CallStaticObjectMethod(gColorSpace_class,
    533             gColorSpace_adaptMethodID, colorSpace, illuminantD50);
    534 
    535     jfloatArray xyzD50 = (jfloatArray) env->CallObjectMethod(colorSpaceD50,
    536             gColorSpaceRGB_getTransformMethodID);
    537 
    538     SkMatrix44 xyzMatrix = getNativeXYZMatrix(env, xyzD50);
    539     SkColorSpaceTransferFn transferFunction = getNativeTransferParameters(env, transferParams);
    540 
    541     return SkColorSpace::MakeRGB(transferFunction, xyzMatrix);
    542 }
    543 
    544 
    545 jobject GraphicsJNI::getColorSpace(JNIEnv* env, sk_sp<SkColorSpace>& decodeColorSpace,
    546         SkColorType decodeColorType) {
    547     jobject colorSpace = nullptr;
    548 
    549     // No need to match, we know what the output color space will be
    550     if (decodeColorType == kRGBA_F16_SkColorType) {
    551         jobject linearExtendedSRGB = env->GetStaticObjectField(
    552                 gColorSpace_Named_class, gColorSpace_Named_LinearExtendedSRGBFieldID);
    553         colorSpace = env->CallStaticObjectMethod(gColorSpace_class,
    554                 gColorSpace_getMethodID, linearExtendedSRGB);
    555     } else {
    556         // Same here, no need to match
    557         if (decodeColorSpace->isSRGB()) {
    558             jobject sRGB = env->GetStaticObjectField(
    559                     gColorSpace_Named_class, gColorSpace_Named_sRGBFieldID);
    560             colorSpace = env->CallStaticObjectMethod(gColorSpace_class,
    561                     gColorSpace_getMethodID, sRGB);
    562         } else if (decodeColorSpace.get() != nullptr) {
    563             // Try to match against known RGB color spaces using the CIE XYZ D50
    564             // conversion matrix and numerical transfer function parameters
    565             SkMatrix44 xyzMatrix(SkMatrix44::kUninitialized_Constructor);
    566             LOG_ALWAYS_FATAL_IF(!decodeColorSpace->toXYZD50(&xyzMatrix));
    567 
    568             SkColorSpaceTransferFn transferParams;
    569             // We can only handle numerical transfer functions at the moment
    570             LOG_ALWAYS_FATAL_IF(!decodeColorSpace->isNumericalTransferFn(&transferParams));
    571 
    572             jobject params = env->NewObject(gTransferParameters_class,
    573                     gTransferParameters_constructorMethodID,
    574                     transferParams.fA, transferParams.fB, transferParams.fC,
    575                     transferParams.fD, transferParams.fE, transferParams.fF,
    576                     transferParams.fG);
    577 
    578             jfloatArray xyzArray = env->NewFloatArray(9);
    579             jfloat xyz[9] = {
    580                     xyzMatrix.getFloat(0, 0),
    581                     xyzMatrix.getFloat(1, 0),
    582                     xyzMatrix.getFloat(2, 0),
    583                     xyzMatrix.getFloat(0, 1),
    584                     xyzMatrix.getFloat(1, 1),
    585                     xyzMatrix.getFloat(2, 1),
    586                     xyzMatrix.getFloat(0, 2),
    587                     xyzMatrix.getFloat(1, 2),
    588                     xyzMatrix.getFloat(2, 2)
    589             };
    590             env->SetFloatArrayRegion(xyzArray, 0, 9, xyz);
    591 
    592             colorSpace = env->CallStaticObjectMethod(gColorSpace_class,
    593                     gColorSpace_matchMethodID, xyzArray, params);
    594 
    595             if (colorSpace == nullptr) {
    596                 // We couldn't find an exact match, let's create a new color space
    597                 // instance with the 3x3 conversion matrix and transfer function
    598                 colorSpace = env->NewObject(gColorSpaceRGB_class,
    599                         gColorSpaceRGB_constructorMethodID,
    600                         env->NewStringUTF("Unknown"), xyzArray, params);
    601             }
    602 
    603             env->DeleteLocalRef(xyzArray);
    604         }
    605     }
    606     return colorSpace;
    607 }
    608 
    609 ///////////////////////////////////////////////////////////////////////////////
    610 bool HeapAllocator::allocPixelRef(SkBitmap* bitmap) {
    611     mStorage = android::Bitmap::allocateHeapBitmap(bitmap);
    612     return !!mStorage;
    613 }
    614 
    615 ////////////////////////////////////////////////////////////////////////////////
    616 
    617 RecyclingClippingPixelAllocator::RecyclingClippingPixelAllocator(
    618         android::Bitmap* recycledBitmap, size_t recycledBytes)
    619     : mRecycledBitmap(recycledBitmap)
    620     , mRecycledBytes(recycledBytes)
    621     , mSkiaBitmap(nullptr)
    622     , mNeedsCopy(false)
    623 {}
    624 
    625 RecyclingClippingPixelAllocator::~RecyclingClippingPixelAllocator() {}
    626 
    627 bool RecyclingClippingPixelAllocator::allocPixelRef(SkBitmap* bitmap) {
    628     // Ensure that the caller did not pass in a NULL bitmap to the constructor or this
    629     // function.
    630     LOG_ALWAYS_FATAL_IF(!mRecycledBitmap);
    631     LOG_ALWAYS_FATAL_IF(!bitmap);
    632     mSkiaBitmap = bitmap;
    633 
    634     // This behaves differently than the RecyclingPixelAllocator.  For backwards
    635     // compatibility, the original color type of the recycled bitmap must be maintained.
    636     if (mRecycledBitmap->info().colorType() != bitmap->colorType()) {
    637         return false;
    638     }
    639 
    640     // The Skia bitmap specifies the width and height needed by the decoder.
    641     // mRecycledBitmap specifies the width and height of the bitmap that we
    642     // want to reuse.  Neither can be changed.  We will try to find a way
    643     // to reuse the memory.
    644     const int maxWidth = SkTMax(bitmap->width(), mRecycledBitmap->info().width());
    645     const int maxHeight = SkTMax(bitmap->height(), mRecycledBitmap->info().height());
    646     const SkImageInfo maxInfo = bitmap->info().makeWH(maxWidth, maxHeight);
    647     const size_t rowBytes = maxInfo.minRowBytes();
    648     const size_t bytesNeeded = maxInfo.computeByteSize(rowBytes);
    649     if (bytesNeeded <= mRecycledBytes) {
    650         // Here we take advantage of reconfigure() to reset the rowBytes
    651         // of mRecycledBitmap.  It is very important that we pass in
    652         // mRecycledBitmap->info() for the SkImageInfo.  According to the
    653         // specification for BitmapRegionDecoder, we are not allowed to change
    654         // the SkImageInfo.
    655         // We can (must) preserve the color space since it doesn't affect the
    656         // storage needs
    657         mRecycledBitmap->reconfigure(
    658                 mRecycledBitmap->info().makeColorSpace(bitmap->refColorSpace()),
    659                 rowBytes);
    660 
    661         // Give the bitmap the same pixelRef as mRecycledBitmap.
    662         // skbug.com/4538: We also need to make sure that the rowBytes on the pixel ref
    663         //                 match the rowBytes on the bitmap.
    664         bitmap->setInfo(bitmap->info(), rowBytes);
    665         bitmap->setPixelRef(sk_ref_sp(mRecycledBitmap), 0, 0);
    666 
    667         // Make sure that the recycled bitmap has the correct alpha type.
    668         mRecycledBitmap->setAlphaType(bitmap->alphaType());
    669 
    670         bitmap->notifyPixelsChanged();
    671         mNeedsCopy = false;
    672 
    673         // TODO: If the dimensions of the SkBitmap are smaller than those of
    674         // mRecycledBitmap, should we zero the memory in mRecycledBitmap?
    675         return true;
    676     }
    677 
    678     // In the event that mRecycledBitmap is not large enough, allocate new memory
    679     // on the heap.
    680     SkBitmap::HeapAllocator heapAllocator;
    681 
    682     // We will need to copy from heap memory to mRecycledBitmap's memory after the
    683     // decode is complete.
    684     mNeedsCopy = true;
    685 
    686     return heapAllocator.allocPixelRef(bitmap);
    687 }
    688 
    689 void RecyclingClippingPixelAllocator::copyIfNecessary() {
    690     if (mNeedsCopy) {
    691         mRecycledBitmap->ref();
    692         SkPixelRef* recycledPixels = mRecycledBitmap;
    693         void* dst = recycledPixels->pixels();
    694         const size_t dstRowBytes = mRecycledBitmap->rowBytes();
    695         const size_t bytesToCopy = std::min(mRecycledBitmap->info().minRowBytes(),
    696                 mSkiaBitmap->info().minRowBytes());
    697         const int rowsToCopy = std::min(mRecycledBitmap->info().height(),
    698                 mSkiaBitmap->info().height());
    699         for (int y = 0; y < rowsToCopy; y++) {
    700             memcpy(dst, mSkiaBitmap->getAddr(0, y), bytesToCopy);
    701             dst = SkTAddOffset<void>(dst, dstRowBytes);
    702         }
    703         recycledPixels->notifyPixelsChanged();
    704         recycledPixels->unref();
    705     }
    706     mRecycledBitmap = nullptr;
    707     mSkiaBitmap = nullptr;
    708 }
    709 
    710 ////////////////////////////////////////////////////////////////////////////////
    711 
    712 AshmemPixelAllocator::AshmemPixelAllocator(JNIEnv *env) {
    713     LOG_ALWAYS_FATAL_IF(env->GetJavaVM(&mJavaVM) != JNI_OK,
    714             "env->GetJavaVM failed");
    715 }
    716 
    717 bool AshmemPixelAllocator::allocPixelRef(SkBitmap* bitmap) {
    718     mStorage = android::Bitmap::allocateAshmemBitmap(bitmap);
    719     return !!mStorage;
    720 }
    721 
    722 ////////////////////////////////////////////////////////////////////////////////
    723 
    724 int register_android_graphics_Graphics(JNIEnv* env)
    725 {
    726     jmethodID m;
    727     jclass c;
    728 
    729     gRect_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Rect"));
    730     gRect_leftFieldID = GetFieldIDOrDie(env, gRect_class, "left", "I");
    731     gRect_topFieldID = GetFieldIDOrDie(env, gRect_class, "top", "I");
    732     gRect_rightFieldID = GetFieldIDOrDie(env, gRect_class, "right", "I");
    733     gRect_bottomFieldID = GetFieldIDOrDie(env, gRect_class, "bottom", "I");
    734 
    735     gRectF_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/RectF"));
    736     gRectF_leftFieldID = GetFieldIDOrDie(env, gRectF_class, "left", "F");
    737     gRectF_topFieldID = GetFieldIDOrDie(env, gRectF_class, "top", "F");
    738     gRectF_rightFieldID = GetFieldIDOrDie(env, gRectF_class, "right", "F");
    739     gRectF_bottomFieldID = GetFieldIDOrDie(env, gRectF_class, "bottom", "F");
    740 
    741     gPoint_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Point"));
    742     gPoint_xFieldID = GetFieldIDOrDie(env, gPoint_class, "x", "I");
    743     gPoint_yFieldID = GetFieldIDOrDie(env, gPoint_class, "y", "I");
    744 
    745     gPointF_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/PointF"));
    746     gPointF_xFieldID = GetFieldIDOrDie(env, gPointF_class, "x", "F");
    747     gPointF_yFieldID = GetFieldIDOrDie(env, gPointF_class, "y", "F");
    748 
    749     gBitmapRegionDecoder_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/BitmapRegionDecoder"));
    750     gBitmapRegionDecoder_constructorMethodID = GetMethodIDOrDie(env, gBitmapRegionDecoder_class, "<init>", "(J)V");
    751 
    752     gBitmapConfig_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Bitmap$Config"));
    753     gBitmapConfig_nativeInstanceID = GetFieldIDOrDie(env, gBitmapConfig_class, "nativeInt", "I");
    754 
    755     gCanvas_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Canvas"));
    756     gCanvas_nativeInstanceID = GetFieldIDOrDie(env, gCanvas_class, "mNativeCanvasWrapper", "J");
    757 
    758     gPicture_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Picture"));
    759     gPicture_nativeInstanceID = GetFieldIDOrDie(env, gPicture_class, "mNativePicture", "J");
    760 
    761     gRegion_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Region"));
    762     gRegion_nativeInstanceID = GetFieldIDOrDie(env, gRegion_class, "mNativeRegion", "J");
    763     gRegion_constructorMethodID = GetMethodIDOrDie(env, gRegion_class, "<init>", "(JI)V");
    764 
    765     c = env->FindClass("java/lang/Byte");
    766     gByte_class = (jclass) env->NewGlobalRef(
    767         env->GetStaticObjectField(c, env->GetStaticFieldID(c, "TYPE", "Ljava/lang/Class;")));
    768 
    769     gVMRuntime_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "dalvik/system/VMRuntime"));
    770     m = env->GetStaticMethodID(gVMRuntime_class, "getRuntime", "()Ldalvik/system/VMRuntime;");
    771     gVMRuntime = env->NewGlobalRef(env->CallStaticObjectMethod(gVMRuntime_class, m));
    772     gVMRuntime_newNonMovableArray = GetMethodIDOrDie(env, gVMRuntime_class, "newNonMovableArray",
    773                                                      "(Ljava/lang/Class;I)Ljava/lang/Object;");
    774     gVMRuntime_addressOf = GetMethodIDOrDie(env, gVMRuntime_class, "addressOf", "(Ljava/lang/Object;)J");
    775 
    776     jclass transfer_params_class = FindClassOrDie(env, "android/graphics/ColorSpace$Rgb$TransferParameters");
    777     gTransferParams_aFieldID = GetFieldIDOrDie(env, transfer_params_class, "a", "D");
    778     gTransferParams_bFieldID = GetFieldIDOrDie(env, transfer_params_class, "b", "D");
    779     gTransferParams_cFieldID = GetFieldIDOrDie(env, transfer_params_class, "c", "D");
    780     gTransferParams_dFieldID = GetFieldIDOrDie(env, transfer_params_class, "d", "D");
    781     gTransferParams_eFieldID = GetFieldIDOrDie(env, transfer_params_class, "e", "D");
    782     gTransferParams_fFieldID = GetFieldIDOrDie(env, transfer_params_class, "f", "D");
    783     gTransferParams_gFieldID = GetFieldIDOrDie(env, transfer_params_class, "g", "D");
    784 
    785     gColorSpace_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/ColorSpace"));
    786     gColorSpace_IlluminantD50FieldID = GetStaticFieldIDOrDie(env,
    787             gColorSpace_class, "ILLUMINANT_D50", "[F");
    788     gColorSpace_adaptMethodID = GetStaticMethodIDOrDie(env, gColorSpace_class, "adapt",
    789             "(Landroid/graphics/ColorSpace;[F)Landroid/graphics/ColorSpace;");
    790     gColorSpace_getMethodID = GetStaticMethodIDOrDie(env, gColorSpace_class,
    791             "get", "(Landroid/graphics/ColorSpace$Named;)Landroid/graphics/ColorSpace;");
    792     gColorSpace_matchMethodID = GetStaticMethodIDOrDie(env, gColorSpace_class, "match",
    793             "([FLandroid/graphics/ColorSpace$Rgb$TransferParameters;)Landroid/graphics/ColorSpace;");
    794 
    795     gColorSpaceRGB_class = MakeGlobalRefOrDie(env,
    796             FindClassOrDie(env, "android/graphics/ColorSpace$Rgb"));
    797     gColorSpaceRGB_constructorMethodID = GetMethodIDOrDie(env, gColorSpaceRGB_class,
    798             "<init>", "(Ljava/lang/String;[FLandroid/graphics/ColorSpace$Rgb$TransferParameters;)V");
    799     gColorSpaceRGB_getTransferParametersMethodID = GetMethodIDOrDie(env, gColorSpaceRGB_class,
    800             "getTransferParameters", "()Landroid/graphics/ColorSpace$Rgb$TransferParameters;");
    801     gColorSpaceRGB_getTransformMethodID = GetMethodIDOrDie(env, gColorSpaceRGB_class,
    802             "getTransform", "()[F");
    803 
    804     gColorSpace_Named_class = MakeGlobalRefOrDie(env,
    805             FindClassOrDie(env, "android/graphics/ColorSpace$Named"));
    806     gColorSpace_Named_sRGBFieldID = GetStaticFieldIDOrDie(env,
    807             gColorSpace_Named_class, "SRGB", "Landroid/graphics/ColorSpace$Named;");
    808     gColorSpace_Named_LinearExtendedSRGBFieldID = GetStaticFieldIDOrDie(env,
    809             gColorSpace_Named_class, "LINEAR_EXTENDED_SRGB", "Landroid/graphics/ColorSpace$Named;");
    810 
    811     gTransferParameters_class = MakeGlobalRefOrDie(env, FindClassOrDie(env,
    812             "android/graphics/ColorSpace$Rgb$TransferParameters"));
    813     gTransferParameters_constructorMethodID = GetMethodIDOrDie(env, gTransferParameters_class,
    814             "<init>", "(DDDDDDD)V");
    815 
    816     return 0;
    817 }
    818