//------------------------------------------------------------------------------
// IqTexOutputFile implementation
boost::shared_ptr<IqTexOutputFile> IqTexOutputFile::open(
const boostfs::path& fileName, EqImageFileType fileType,
const CqTexFileHeader& header)
{
// Check some of the header data to make sure it's minimally sane...
if(header.width() <= 0 || header.height() <= 0)
{
AQSIS_THROW_XQERROR(XqInternal, EqE_BadFile, "Cannot open \"" << fileName
<< "\" - image width and height cannot be negative or zero.");
}
if(header.channelList().numChannels() == 0)
{
AQSIS_THROW_XQERROR(XqInternal, EqE_BadFile, "Cannot open \"" << fileName
<< "\" - no data channels present.");
}
// Create the new file object
boost::shared_ptr<IqTexOutputFile> newFile
= openMultiOutputFile(fileName, fileType, header);
if(newFile)
return newFile;
switch(fileType)
{
// case ...: // Add new output formats here!
case ImageFile_Exr:
case ImageFile_Jpg:
case ImageFile_Png:
AQSIS_THROW_XQERROR(XqInternal, EqE_Unimplement, "Cannot open \""
<< fileName << "\" - unimplemented file type \"" << fileType << "\"");
default:
AQSIS_THROW_XQERROR(XqInternal, EqE_BadFile, "Cannot open \""
<< fileName << "\" - unknown file type \"" << fileType << "\"");
}
return newFile;
}
void CqTiffDirHandle::writeRequiredAttrs(const CqTexFileHeader& header)
{
// Width, height...
setTiffTagValue<uint32>(TIFFTAG_IMAGEWIDTH, header.width());
setTiffTagValue<uint32>(TIFFTAG_IMAGELENGTH, header.height());
// Orientation & planar config should always be fixed.
setTiffTagValue<uint16>(TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
setTiffTagValue<uint16>(TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
// Pixel aspect ratio
// We have no meaningful resolution unit - we're only interested in pixel
// aspect ratio, so set the resolution unit to none.
setTiffTagValue<uint16>(TIFFTAG_RESOLUTIONUNIT, RESUNIT_NONE);
setTiffTagValue<float>(TIFFTAG_XRESOLUTION, 1.0f);
setTiffTagValue<float>(TIFFTAG_YRESOLUTION, header.find<Attr::PixelAspectRatio>(1));
// Compression-related stuff
writeCompressionAttrs(header);
// Channel-related stuff
writeChannelAttrs(header);
const SqTileInfo* tileInfo = header.findPtr<Attr::TileInfo>();
if(tileInfo)
{
// Set tile dimensions if present.
setTiffTagValue<uint32>(TIFFTAG_TILEWIDTH, tileInfo->width);
setTiffTagValue<uint32>(TIFFTAG_TILELENGTH, tileInfo->height);
}
else
{
// Else write strip size - AFAICT libtiff uses the values of some other
// fields (compression) to choose a default, so do this last.
setTiffTagValue<uint32>(TIFFTAG_ROWSPERSTRIP, TIFFDefaultStripSize(tiffPtr(), 0));
}
}
