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;
}
