Hi Uma, you can use TextureRectangle instead of Texture2D. Then your UV mapping is in the range of s:0-imageWidth, t:0-imageHeight and the image will preserve its original size
On Tue, Nov 22, 2016 at 2:06 PM, Christian Buchner < christian.buch...@gmail.com> wrote: > > Your OpenGL implementation might signal a maximum texture size of 4096. > > Which is why there is no alternative to downsizing it. > > There is also an OSG_MAX_TEXTURE_SIZE environment variable. I am not sure > what its default value is, or if it has a default at all. Have you tried > forcing this to 8192? > > Christian > > > > 2016-11-22 13:58 GMT+01:00 Uma Devi Selvaraj <umaselvam1...@gmail.com>: > >> Hi, >> >> I have simple code that renders image using osgviewer. I am able to >> render the image successfully with the code. My problem now is the size of >> the image is reduced. for example the original size of the image is 4683 * >> 3035, the image is reduced to 4096 * 3035. Is this expected behaviour or is >> there anything I need to add in my code. I have added my code. >> >> >> //required header files >> >> int main(int argc,char**argv) >> { >> >> osg::ref_ptr<osg::Image> image; >> image = osgDB::readImageFile("C:\\Users\\mcw\\Desktop\\DemModel.tif. >> gdal"); >> std::cout << "Image info are " << image->s() << "\n" <<image->t() >> <<"\n" <<image->r() << std::endl; >> if (!(image.valid())) >> { >> std::cout << "Unable to read image file " << std::endl; >> getchar(); >> return 0; >> } >> >> osg::ref_ptr<osg::Geode> geode =(osg::createGeodeForImage(ima >> ge)); >> >> osg::Texture2D *texture = new osg::Texture2D(); >> texture->setFilter(osg::Texture::MIN_FILTER, >> osg::Texture::LINEAR); >> texture->setFilter(osg::Texture::MAG_FILTER, >> osg::Texture::LINEAR); >> texture->setWrap(osg::Texture::WRAP_R, osg::Texture::REPEAT); >> texture->setResizeNonPowerOfTwoHint(false); >> texture->setImage(image); >> texture->setBorderColor(osg::Vec4d(0.4f, 0.5f, 0.6f, 1.0f)); >> osg::StateSet* stateset = new osg::StateSet; >> >> stateset->setTextureAttributeAndModes(0, texture, >> osg::StateAttribute::ON); >> >> geode->setStateSet(stateset); >> osgViewer::Viewer viewer; >> viewer.setSceneData(geode.get()); >> getchar(); >> return viewer.run(); >> >> } >> >> ... >> >> Thank you! >> >> Cheers, >> Uma >> >> ------------------ >> Read this topic online here: >> http://forum.openscenegraph.org/viewtopic.php?p=69470#69470 >> >> >> >> >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > -- trajce nikolov nick
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