Hi Robert, Please ignor last email, and this request. I've just realised what to do. Put it down to temporary moment of insanity on my part.
Thanks for help. Neil. ---- [email protected] wrote: > Hi Robert, > > Thanks for coming back to me so quickly, however I don't think I made myself > clear enough, as I'm not sure that osgconv is what I'm looking for. I'm > sitting within the zip plugin code, and I have the stream of bytes that > represents one of the files within the zip file. I need to know whether I > should be passing this stream into a ReadImage, readNode, readObject, or > readArchive function - like the Curl plugin does. Now, I can get the > appropriate reader as the registry provides functions for doing that. What I > need to know, within code, is what type of object that stream represents, so > that I can call the appropriate function within the plugin code at runtime. > > I was hoping that a plugin might publish the type of object it creates via a > call, but I've looked at the plugin codes and all that is really available > seems to be the extensions that a reader addresses, and not the type of > object it returns. > > So, for example, I would like the JPG,TGA,BMP,PNG...(A.N.Other image format) > plugins to return IMAGE as the object type they create creates, whilst the > OSG, 3DS, FLT, IVE and (A.N.Other object format) would return node. > > Any thoughts ? > > Thanks in advance. > > Neil. > > > > > > > > ---- Robert Osfield <[email protected]> wrote: > > Hi Neil, > > > > In OSG-2.8 you can do osgconv --formats to get a listed of all the > > capabilities of the plugins. > > > > Robert. > > > > On Wed, Apr 1, 2009 at 5:29 PM, <[email protected]> wrote: > > > > > Hi All, > > > > > > Can anyone tell me whether there is a way (call) in OSG to say what type > > > of > > > object a plugin will produce ? i.e. if I have a file "A.jpg" and I call > > > osgDB::Registry::instance()->getReaderWriterForExtension passing in the > > > file > > > extension, I get the readerwriter. What I would like to know is what > > > ObjectType that readerwrite would return. > > > > > > The reason for the question is I'm updating the ReaderWriterZip plugin to > > > handle in-memory zip extraction, and I want to be able to give it a zip > > > file > > > that contains many files of varying format. Rippling through the zip file > > > I > > > can get the individual files, and their content, and unzip them in memory, > > > but the issue I have is that I don't really want to have a big If > > > statement > > > in the plugin to look at the known file extensions and to say whether I > > > should be calling ReadNode or ReadImage. I would like to be able to > > > enquire > > > the type of Object that the reader would produce, and then have a simple > > > switch statement like the Curl plugin. > > > > > > One route I thought of would be to add to extend each plugin to have a > > > function based that returns the type of object, and I guess this would be > > > fairly straight forward, but before delving in, I just wanted to check if > > > there is a method already available. > > > > > > Many thanks for any help. > > > > > > Neil. > > > > > > _______________________________________________ > > > 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 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
