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From Remo Eichenberger, "I have extended the TIFF plugin that allows you to write LZW or JPEG compressed TIFF's. Options are:

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tiff_compression = lzw | jpeg"
This commit is contained in:
Robert Osfield
2014-04-08 12:00:52 +00:00
parent 25ddbf8f1f
commit a4a5957e2f
1 changed files with 30 additions and 4 deletions
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34
src/osgPlugins/tiff/ReaderWriterTIFF.cpp
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@@ -829,8 +829,34 @@ class ReaderWriterTIFF : public osgDB::ReaderWriter
return pOsgImage;
}
WriteResult::WriteStatus writeTIFStream(std::ostream& fout, const osg::Image& img) const
WriteResult::WriteStatus writeTIFStream(std::ostream& fout, const osg::Image& img, const osgDB::ReaderWriter::Options* options) const
{
int compressionType = COMPRESSION_PACKBITS;
if (options) {
std::istringstream iss(options->getOptionString());
std::string opt;
while (iss >> opt) {
opt = osgDB::convertToLowerCase(opt);
std::size_t eqInd = opt.find("=");
if (opt.substr(0, eqInd) == "tiff_compression") {
std::string compressTypeOpt;
compressTypeOpt = opt.substr(eqInd + 1);
compressTypeOpt = osgDB::convertToLowerCase(compressTypeOpt);
if (compressTypeOpt == "packbits") {
compressionType = COMPRESSION_PACKBITS;
}
else if (compressTypeOpt == "lzw") {
compressionType = COMPRESSION_LZW;
}
else if (compressTypeOpt == "jpeg") {
compressionType = COMPRESSION_JPEG;
}
}
}
}
//Code is based from the following article on CodeProject.com
//http://www.codeproject.com/bitmap/BitmapsToTiffs.asp
@@ -897,7 +923,7 @@ class ReaderWriterTIFF : public osgDB::ReaderWriter
TIFFSetField(image, TIFFTAG_BITSPERSAMPLE,bitsPerSample);
TIFFSetField(image, TIFFTAG_SAMPLESPERPIXEL,samplesPerPixel);
TIFFSetField(image, TIFFTAG_PHOTOMETRIC, photometric);
TIFFSetField(image, TIFFTAG_COMPRESSION, COMPRESSION_PACKBITS);
TIFFSetField(image, TIFFTAG_COMPRESSION, compressionType);
TIFFSetField(image, TIFFTAG_FILLORDER, FILLORDER_MSB2LSB);
TIFFSetField(image, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
@@ -945,9 +971,9 @@ class ReaderWriterTIFF : public osgDB::ReaderWriter
return rr;
}
virtual WriteResult writeImage(const osg::Image& img,std::ostream& fout,const osgDB::ReaderWriter::Options* /*options*/) const
virtual WriteResult writeImage(const osg::Image& img,std::ostream& fout,const osgDB::ReaderWriter::Options* options) const
{
WriteResult::WriteStatus ws = writeTIFStream(fout,img);
WriteResult::WriteStatus ws = writeTIFStream(fout,img, options);
return ws;
}