actually i just want to have a scale code of image.. half and quarter resolution would be enough for me.. i wanted to scale them when i create terrain.
i have a terrain editor and viewer which are 2 separate programs. on editor, in saving process, i want to store lower resolution textures too and i wanted to create in my program. my terrain viewer program will load all textures and use low resolution textures for pages which are far away from the camera.. i don't want to use .dds because in terrain editor, user can use any texture he wants. so i don't want to give up texture selection dynamism here.. i can't limit users just with my textures which are selected before. On Thu, Aug 20, 2009 at 5:58 PM, Ümit Uzun <[email protected]> wrote: > Hi Ufuk; > > If you want to create mippaped images on your disk instead of > programmaticaly. I suggest you to use GIMP to mipmap(rescale each different > resolution image separately) and when you need you can call related > resolution image :) > > Is this your expected or you want to create one image which has all > resoluted images in it? If you want kind of this operation you can use dds > format. But I don't know osg does support reading mipmapped dds format. > > > Regards. > > Ümit Uzun > > > 2009/8/20 Ufuk <[email protected]> > >> Hi Ümit,yes, i need mipmapping but i want to store these mipmapped >> textures on disk. i dont want so many calculations on rendering... >> so i wanted to store these images on disk. >> >> do you know a way to do this or i should write a code? >> >> >> On Thu, Aug 20, 2009 at 5:43 PM, Ümit Uzun <[email protected]> wrote: >> >>> Hi Ufuk; >>> >>> Compress word doesn't define your expected operation very well. This >>> operation's name is Mipmapping. You should generate automatic mipmapping for >>> your texture in runtime and the you can choose any resolution you have >>> created to use your program. >>> >>> Regards. >>> >>> Ümit Uzun >>> >>> >>> 2009/8/20 Ufuk <[email protected]> >>> >>>> is there any function that compress image in osg? >>>> for example i have an 256x256 image and i want to compress it to 128x128 >>>> or 64x64... >>>> >>>> i checked for osg::Image::scaleImage() but it did not change the >>>> resolution.. maybe i did something wrong? >>>> >>>> Here is the code: >>>> >>>> >>>> /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// >>>> void simUtil::SimImageUtils::scaleAndSaveImage( osg::Image* image, float >>>> scaleFactor, const std::string& filename ) >>>> { >>>> osg::ref_ptr<osg::Image> cImage = new osg::Image(*image); >>>> >>>> cImage->scaleImage(image->s() * scaleFactor, image->t() * >>>> scaleFactor, image->r() * scaleFactor); >>>> >>>> osgDB::writeImageFile(*image, filename); >>>> } >>>> >>>> /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// >>>> >>>> -- >>>> Ufuk >>>> >>>> _______________________________________________ >>>> osg-users mailing list >>>> [email protected] >>>> >>>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >>>> >>>> >>> >>> _______________________________________________ >>> osg-users mailing list >>> [email protected] >>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >>> >>> >> >> >> -- >> Ufuk >> >> _______________________________________________ >> osg-users mailing list >> [email protected] >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > -- Ufuk
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