(For reference, this is a continuation/recap of the thread ".ive plugin: incorrect ReadResult?" from early May.) Hi all -- I think it would be useful to add a new OSG application to the core distribution for determining supported file formats. The output of such an app might be a list of extensions and whether input or output is supported for that extension using the Node, Image, Object, and/or HeightField interfaces in osgDB. Output would vary from one installation to another based on available plugins. Based on a lab Bob Kuehne created for our OSG training courses, I have crafted such an application, and Bob and I are prepared to submit it for inclusion in core OSG. However, the application relies on plugins being robust enough to return the expected value when attempting to read an empty file of a supported type. Currently, many plugins are not robust enough to meet this requirement. To explain further: To test the IVE plugin for Node input support, the application creates an empty .ive file and calls readNode directly on the plugin's ReaderWriter. Because OSG's IVE plugin supports reading .ive files into Nodes, the worst return value the app expects to see is ERROR_IN_READING_FILE. However, the IVE plugin (and many other plugins) "incorrectly" return FILE_NOT_HANDLED when attempting to read an empty file, even though the extension is supported.
There are two ways I can proceed to create this app: 1) Submit what I currently have to osg-submissions, and fix issues with the plugins as they are encountered. I've already fixed some, but more work remains; this will require community effort. However, I'm optimistic we could have a viable application in the SIGGRAPH timeframe. 2) I'm interested in suggestions for better ways to write such an application -- some other technique that doesn't depend on plugins correctly handling empty files. Any ideas? If we all decide option 1 is the best way to go, I'll submit my code ASAP. Just wanted to have a little discussion first and make sure this was the correct route. Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com <http://www.skew-matrix.com/> +1 303 859 9466 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
