Yes. The "implementation" was too naive and didn't actually work. GLX Pixmaps are implemented as Pbuffers behind the scenes in VirtualGL, so I was modifying the arguments of glXBindTexImageEXT() and glXReleaseTexImageEXT(), replacing "display" with the 3D X Server connection handle and "drawable" with the Pbuffer handle representing the GLX Pixmap. Unfortunately, however, the underlying implementation of glXBindTexImageEXT() only works with an actual Pixmap, not a Pbuffer, so rather than leave a broken implementation in the code, I ripped it out until I could implement it properly. I'm embarrassed to say that it has fallen off my radar until now.
Bearing in mind that GLXDrawables in VirtualGL are actually always GLXPbuffers, that is what will be passed into glXBindTexImageEXT(). Thus, that function would need to create a temporary GLXPixmap on the 3D X server, copy the pixels from the GLXPbuffer into the temporary GLXPixmap, then call glXBindTexImageEXT() in the underlying libGL, modifying the arguments accordingly so that it is invoked on the 3D X server using the temporary GLXPixmap. Then, glXReleaseTexImageEXT() would copy the pixels back from the temporary GLXPixmap to the GLXPbuffer and destroy the temporary GLXPixmap. There would have to be an additional hash added to track the relationship between GLXDrawable handles and temporary GLXPixmap handles. This is all probably 3-5 hours of work, not including testing, so I'll try to find some time to look into it. Unless I'm really missing something (which is always possible), I think the above will provide "minimal" support for the extension, but if history is any indication, there's probably some app somewhere that will figure out a clever way to break it by doing something that is not strictly kosher but which they can get away with on a "local" implementation. On 1/11/13 3:09 AM, Leho Kraav wrote: > Ohh, that's strange, I could've sworn 2.1.4 changelog said "implemented > GLX_EXT_texture_from_pixmap for compiz". Did that get reverted somewhere > on the way to 2.3+? ------------------------------------------------------------------------------ Master HTML5, CSS3, ASP.NET, MVC, AJAX, Knockout.js, Web API and much more. Get web development skills now with LearnDevNow - 350+ hours of step-by-step video tutorials by Microsoft MVPs and experts. SALE $99.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122812 _______________________________________________ VirtualGL-Users mailing list VirtualGL-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/virtualgl-users
