Allocation *Allocation::createFromStream(Context *rsc, IStream *stream) {
    // First make sure we are reading the correct object
    RsA3DClassID classID = (RsA3DClassID)stream->loadU32();
    if (classID != RS_A3D_CLASS_ID_ALLOCATION) {
        rsc->setError(RS_ERROR_FATAL_DRIVER,
                      "allocation loading failed due to corrupt file. (invalid id)\n");
        return nullptr;
    }

    const char *name = stream->loadString();

    Type *type = Type::createFromStream(rsc, stream);
    if (!type) {
        return nullptr;
    }
    type->compute();

    Allocation *alloc = Allocation::createAllocation(rsc, type, RS_ALLOCATION_USAGE_SCRIPT);
    type->decUserRef();

    // Number of bytes we wrote out for this allocation
    uint32_t dataSize = stream->loadU32();
    // 3 element vectors are padded to 4 in memory, but padding isn't serialized
    uint32_t packedSize = alloc->getPackedSize();
    if (dataSize != type->getPackedSizeBytes() &&
        dataSize != packedSize) {
        rsc->setError(RS_ERROR_FATAL_DRIVER,
                      "allocation loading failed due to corrupt file. (invalid size)\n");
        ObjectBase::checkDelete(alloc);
        ObjectBase::checkDelete(type);
        return nullptr;
    }

    alloc->assignName(name);
    if (dataSize == type->getPackedSizeBytes()) {
        uint32_t count = dataSize / type->getElementSizeBytes();
        // Read in all of our allocation data
        alloc->data(rsc, 0, 0, count, stream->getPtr() + stream->getPos(), dataSize);
    } else {
        alloc->unpackVec3Allocation(rsc, stream->getPtr() + stream->getPos(), dataSize);
    }
    stream->reset(stream->getPos() + dataSize);

    return alloc;
}
RsAllocation rsi_AllocationCreateFromBitmap(Context *rsc, RsType vtype,
                                            RsAllocationMipmapControl mipmaps,
                                            const void *data, size_t sizeBytes, uint32_t usages) {
    Type *t = static_cast<Type *>(vtype);

    RsAllocation vTexAlloc = rsi_AllocationCreateTyped(rsc, vtype, mipmaps, usages, 0);
    Allocation *texAlloc = static_cast<Allocation *>(vTexAlloc);
    if (texAlloc == nullptr) {
        ALOGE("Memory allocation failure");
        return nullptr;
    }

    texAlloc->data(rsc, 0, 0, 0, RS_ALLOCATION_CUBEMAP_FACE_POSITIVE_X,
                   t->getDimX(), t->getDimY(), data, sizeBytes, 0);
    if (mipmaps == RS_ALLOCATION_MIPMAP_FULL) {
        rsc->mHal.funcs.allocation.generateMipmaps(rsc, texAlloc);
    }

    texAlloc->sendDirty(rsc);
    return texAlloc;
}
RsAllocation rsi_AllocationCubeCreateFromBitmap(Context *rsc, RsType vtype,
                                                RsAllocationMipmapControl mipmaps,
                                                const void *data, size_t sizeBytes, uint32_t usages) {
    Type *t = static_cast<Type *>(vtype);

    // Cubemap allocation's faces should be Width by Width each.
    // Source data should have 6 * Width by Width pixels
    // Error checking is done in the java layer
    RsAllocation vTexAlloc = rsi_AllocationCreateTyped(rsc, vtype, mipmaps, usages, 0);
    Allocation *texAlloc = static_cast<Allocation *>(vTexAlloc);
    if (texAlloc == nullptr) {
        ALOGE("Memory allocation failure");
        return nullptr;
    }

    uint32_t faceSize = t->getDimX();
    uint32_t strideBytes = faceSize * 6 * t->getElementSizeBytes();
    uint32_t copySize = faceSize * t->getElementSizeBytes();

    uint8_t *sourcePtr = (uint8_t*)data;
    for (uint32_t face = 0; face < 6; face ++) {
        for (uint32_t dI = 0; dI < faceSize; dI ++) {
            texAlloc->data(rsc, 0, dI, 0, (RsAllocationCubemapFace)face,
                           t->getDimX(), 1, sourcePtr + strideBytes * dI, copySize, 0);
        }

        // Move the data pointer to the next cube face
        sourcePtr += copySize;
    }

    if (mipmaps == RS_ALLOCATION_MIPMAP_FULL) {
        rsc->mHal.funcs.allocation.generateMipmaps(rsc, texAlloc);
    }

    texAlloc->sendDirty(rsc);
    return texAlloc;
}
Allocation *Allocation::createFromStream(Context *rsc, IStream *stream) {
    // First make sure we are reading the correct object
    RsA3DClassID classID = (RsA3DClassID)stream->loadU32();
    if (classID != RS_A3D_CLASS_ID_ALLOCATION) {
        ALOGE("allocation loading skipped due to invalid class id\n");
        return NULL;
    }

    String8 name;
    stream->loadString(&name);

    Type *type = Type::createFromStream(rsc, stream);
    if (!type) {
        return NULL;
    }
    type->compute();

    // Number of bytes we wrote out for this allocation
    uint32_t dataSize = stream->loadU32();
    if (dataSize != type->getSizeBytes()) {
        ALOGE("failed to read allocation because numbytes written is not the same loaded type wants\n");
        ObjectBase::checkDelete(type);
        return NULL;
    }

    Allocation *alloc = Allocation::createAllocation(rsc, type, RS_ALLOCATION_USAGE_SCRIPT);
    alloc->setName(name.string(), name.size());
    type->decUserRef();

    uint32_t count = dataSize / type->getElementSizeBytes();

    // Read in all of our allocation data
    alloc->data(rsc, 0, 0, count, stream->getPtr() + stream->getPos(), dataSize);
    stream->reset(stream->getPos() + dataSize);

    return alloc;
}
void rsi_Allocation3DData(Context *rsc, RsAllocation va, uint32_t xoff, uint32_t yoff, uint32_t zoff, uint32_t lod,
                          uint32_t w, uint32_t h, uint32_t d, const void *data, size_t sizeBytes, size_t stride) {
    Allocation *a = static_cast<Allocation *>(va);
    a->data(rsc, xoff, yoff, zoff, lod, w, h, d, data, sizeBytes, stride);
}
void rsi_Allocation2DData(Context *rsc, RsAllocation va, uint32_t xoff, uint32_t yoff, uint32_t lod, RsAllocationCubemapFace face,
                          uint32_t w, uint32_t h, const void *data, size_t sizeBytes, size_t stride) {
    Allocation *a = static_cast<Allocation *>(va);
    a->data(rsc, xoff, yoff, lod, face, w, h, data, sizeBytes, stride);
}
void rsi_Allocation1DData(Context *rsc, RsAllocation va, uint32_t xoff, uint32_t lod,
                          uint32_t count, const void *data, size_t sizeBytes) {
    Allocation *a = static_cast<Allocation *>(va);
    a->data(rsc, xoff, lod, count, data, sizeBytes);
}