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
