Hi Adam,
see attached.
jp
Adam Weiss wrote:
Hi,
I'm trying to convert an osg::Image to a PNG file in memory (byte array). I know
I could write it to a file, then read it back in, but I was hoping for a more
direct route. The goal is to then have another library read in the byte array
directly. I tried just using the image->data() function, but the data appears
to not have a valid image header.
Hopefully, I made my question clear.
Thank you!
Cheers,
Adam
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=18459#18459
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/* OpenSceneGraph example, osgcompositeviewer.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <iostream>
#include <sstream>
#include <osgUtil/Optimizer>
#include <osgDB/ReadFile>
#include <osgDB/WriteFile>
#include <osg/Material>
#include <osg/Geode>
#include <osg/BlendFunc>
#include <osg/Depth>
#include <osg/Projection>
#include <osg/PolygonOffset>
#include <osg/MatrixTransform>
#include <osg/Camera>
#include <osg/FrontFace>
#include <osgText/Text>
#include <osgGA/TrackballManipulator>
#include <osgGA/FlightManipulator>
#include <osgGA/StateSetManipulator>
#include <osgViewer/ViewerEventHandlers>
#include <osgViewer/CompositeViewer>
#include <osgFX/Scribe>
#include <osg/io_utils>
#include <osgDB/FileUtils>
#include <osgDB/ReadFile>
int main( int argc, char **argv )
{
osg::ref_ptr<osg::Image> startIm = osgDB::readImageFile("test.jpg");
//osgDB::writeImageFile(*startIm, "new.png");
//osgDB::writeImageFile(*startIm, "new.jpg");
osg::ref_ptr<osgDB::ReaderWriter> writer =
//osgDB::Registry::instance()->getReaderWriterForExtension("jpg");
osgDB::Registry::instance()->getReaderWriterForExtension("png");
if( !writer.valid() )
return -1;
osg::ref_ptr<osgDB::ReaderWriter::Options> op = new osgDB::ReaderWriter::Options();
//op->setOptionString("JPEG_QUALITY 75");
op->setOptionString("PNG_COMPRESSION 9");
for(int i=0;i<100;i++) {
std::stringstream ss;
osgDB::ReaderWriter::WriteResult res = writer->writeImage(*startIm,ss,op);
std::cout << ss.str().size() << "\n";
//std::ofstream fout("new.jpg");
//fout << ss.str();
}
return 0;
}
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