Int64
Header::writeTo (OPENEXR_IMF_INTERNAL_NAMESPACE::OStream &os, bool isTiled) const
{
//
// Write a "magic number" to identify the file as an image file.
// Write the current file format version number.
//
int version = EXR_VERSION;
//
// Write all attributes. If we have a preview image attribute,
// keep track of its position in the file.
//
Int64 previewPosition = 0;
const Attribute *preview =
findTypedAttribute <PreviewImageAttribute> ("preview");
for (ConstIterator i = begin(); i != end(); ++i)
{
//
// Write the attribute's name and type.
//
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::write <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (os, i.name());
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::write <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (os, i.attribute().typeName());
//
// Write the size of the attribute value,
// and the value itself.
//
StdOSStream oss;
i.attribute().writeValueTo (oss, version);
std::string s = oss.str();
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::write <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (os, (int) s.length());
if (&i.attribute() == preview)
previewPosition = os.tellp();
os.write (s.data(), int(s.length()));
}
//
// Write zero-length attribute name to mark the end of the header.
//
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::write <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (os, "");
return previewPosition;
}
OutputFile::OutputFile
(OPENEXR_IMF_INTERNAL_NAMESPACE::OStream &os,
const Header &header,
int numThreads)
:
_data (new Data (numThreads))
{
_data->_streamData=new OutputStreamMutex ();
_data->_deleteStream=false;
try
{
header.sanityCheck();
_data->_streamData->os = &os;
_data->multiPart=false;
initialize (header);
_data->_streamData->currentPosition = _data->_streamData->os->tellp();
// Write header and empty offset table to the file.
writeMagicNumberAndVersionField(*_data->_streamData->os, _data->header);
_data->previewPosition =
_data->header.writeTo (*_data->_streamData->os);
_data->lineOffsetsPosition =
writeLineOffsets (*_data->_streamData->os, _data->lineOffsets);
}
catch (IEX_NAMESPACE::BaseExc &e)
{
// ~OutputFile will not run, so free memory here
if (_data)
{
if (_data->_streamData)
delete _data->_streamData;
delete _data;
}
REPLACE_EXC (e, "Cannot open image file "
"\"" << os.fileName() << "\". " << e.what());
throw;
}
catch (...)
{
// ~OutputFile will not run, so free memory here
if (_data)
{
if (_data->_streamData)
delete _data->_streamData;
delete _data;
}
throw;
}
}
Int64
TileOffsets::writeTo (OPENEXR_IMF_INTERNAL_NAMESPACE::OStream &os) const
{
//
// Write the tile offset table to the file, and
// return the position of the start of the table
// in the file.
//
Int64 pos = os.tellp();
if (pos == -1)
IEX_NAMESPACE::throwErrnoExc ("Cannot determine current file position (%T).");
for (unsigned int l = 0; l < _offsets.size(); ++l)
for (unsigned int dy = 0; dy < _offsets[l].size(); ++dy)
for (unsigned int dx = 0; dx < _offsets[l][dy].size(); ++dx)
OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::write <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (os, _offsets[l][dy][dx]);
return pos;
}
TiledOutputFile::TiledOutputFile
(OPENEXR_IMF_INTERNAL_NAMESPACE::OStream &os,
const Header &header,
int numThreads)
:
_data (new Data (numThreads)),
_streamData (new OutputStreamMutex()),
_deleteStream (false)
{
try
{
header.sanityCheck(true);
_streamData->os = &os;
_data->multipart=false; // since we opened with one header we can't be multipart
initialize (header);
_streamData->currentPosition = _streamData->os->tellp();
// Write header and empty offset table to the file.
writeMagicNumberAndVersionField(*_streamData->os, _data->header);
_data->previewPosition = _data->header.writeTo (*_streamData->os, true);
_data->tileOffsetsPosition = _data->tileOffsets.writeTo (*_streamData->os);
}
catch (IEX_NAMESPACE::BaseExc &e)
{
delete _streamData;
delete _data;
REPLACE_EXC (e, "Cannot open image file "
"\"" << os.fileName() << "\". " << e);
throw;
}
catch (...)
{
delete _streamData;
delete _data;
throw;
}
}
