Hi Raphael, The changes of the OSG uses this tricked out non standard vendor lock-in mechanism are 0.
If such an extension was available across platforms it might make some sense, but given the massive amount of changes it'd require, for a minor platform like OSX, and the likely small performance delta they might give anyway I think it would be huge waste of resources and added code complexity, associated bugs and testing. It would in the end be an utter nightmare to maintain for little gain for a small number of users. Far more interesting is items like OpenGL-ES and OpenGL 3.x, this is the future of OpenGL, not a silly little detour Apple hopes to hook you into to make you apps even more tied to a single platform. Robert. On Thu, Mar 20, 2008 at 11:22 AM, Raphael Sebbe <[EMAIL PROTECTED]> wrote: > Hi all, > > On Mac OS X, there is a possibility of using a special mechanism for OpenGL > calls, that is, you include CGLMacros.h in your source, and all gl*** calls > take an implicit additional parameter, the context. This makes the use of a > "current active context" unnecessary, gives better performance and it works > better with threads. Developers are encouraged to use that mechanism. > > Some apps (thinking of Quartz Composer) strongly suggest that this is used > for their plugins, drawing to the given context, and discourage changing the > current OpenGL context. I guess we're not far from a "suggest" becoming a > "require" in the future. > > > The way it works is that you have to define a local variable with the name > cgl_ctx, and that variable is passed as first argument to the special gl > calls: > > CGLContextObj cgl_ctx = aContext; > glBegin(GL_LINES); // which actually is like _blaBegin(cgl_ctx, GL_LINES), > because of CGLMacro.h inclusion > // this won't compile if cgl_ctx is not defined > > > > > So my question is: what is your thought about integrating this mechanism in > OSG? > > Thanks, > > Raphael > > > > _______________________________________________ > 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
