is an example). This can happen in circumstances that are not
manageable by the OSG itself (e.g. 3rd party buggy program) but one
would expect the plugin to be able to recover by returning
ReadResult::ERROR_IN_READING_FILE.
libpng provides two callbacks for warnings and errors - those are
currently unused. By default, they point to function that call exit()
or something similar (the default error callback never returns). This
patch registers the callbacks using libpng's mechanisms, makes the
warning callback emit an osg::notify(osg::WARN) message and the error
callback throw an error. The reading process is enclosed in a
try...catch block. Upon error, the memory is freed and
ReadResult::ERROR_IN_READING_FILE is returned.
"
completed the new registration of the plugin-readerwriters
("REGISTER_OSGPLUGIN") according to your osgstaticviewer-example (see
attachment, based on today's svn)."
instead of osgDB::Registry where it original lay. This has been done to allow
fileName strings to be encode data rather than just file names, such as one
requires when using PagedLOD along with plugins for doing dynamic tesselation.
osg::Image::setImage has also been modified to require the AllocationMode
mode to be passed to it so that it knows how to delete the data once the
image goes out of scope.
Port the image plugins across to specify the new AllocationMode, and converted
them across to using new/delete in place of malloc/free.
added since the png loader itself doesn't not seem robust enough at detecting
non png files.
Added a tab in to the flt code to make it more obvious what is happening in
the flow of the code.
for settings options in osgDB::Registry, and added the paramter to all of the
reaader/writer plugins. The Options structure by default has an string attached
for packing basic options, however, it also can be subclassed to encapsulate
any users defined option data. In the later case both the client code *and*
the plugin need to be aware of subclass, the plugin will need to use
dynamic_cast<> to assertain its type.
