<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - NV30: Xfwm4 use_compositing - garbled display" href="https://bugs.freedesktop.org/show_bug.cgi?id=90871#c42">Comment # 42</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - NV30: Xfwm4 use_compositing - garbled display" href="https://bugs.freedesktop.org/show_bug.cgi?id=90871">bug 90871</a> from <a class="email" href="mailto:imirkin@alum.mit.edu" title="Ilia Mirkin <imirkin@alum.mit.edu>"> Ilia Mirkin</a> <pre>(In reply to Ilia Mirkin from <a href="show_bug.cgi?id=90871#c41">comment #41</a>) > (In reply to Hans de Goede from <a href="show_bug.cgi?id=90871#c40">comment #40</a>) > > Hi All, > > > > (In reply to Olivier Fourdan from <a href="show_bug.cgi?id=90871#c11">comment #11</a>) > > > Created <a href="attachment.cgi?id=116536" name="attach_116536" title="test program">attachment 116536</a> <a href="attachment.cgi?id=116536&action=edit" title="test program">[details]</a> > > > test program > > > > So after some time away from this bug, I'm back onto it. The problem is that > > the test program ends up using > > GL_TEXTURE_2D type textures / GLX_TEXTURE_2D_EXT target, where it should be > > using GL_TEXTURE_RECTANGLE_ARB. > > > > The root cause for this seems to be that epoxy_has_glx_extension (dpy, > > screen, "GL_ARB_texture_rectangle") always returns false, even though the > > extension is there, as confirmed with both glxinfo and glxgears-info. > > Er yeah, it's not a GLX ext, no reason it'd be coming up in the GLX ext > list. While similarly-named, they're entirely separate namespaces. > > > > > Now the extension in question is not a glx-extension, but a gl-extension, so > > I've also tried calling: > > epoxy_has_gl_extension ("GL_ARB_texture_rectangle") but that always returns > > false too. > > That's surprising. > > src/mesa/main/extensions.c: { "GL_ARB_texture_rectangle", > o(NV_texture_rectangle), GL, 2004 }, > src/mesa/state_tracker/st_extensions.c: extensions->NV_texture_rectangle = > GL_TRUE; > > So it should actually always be exposed for any st/mesa-backed dri driver > (including nv30). Right, so the issue is that this is done before a GL context is made current. Fixing the code is annoying so I also just hard-coded it to be always-true. And I also just get a gray screen now. The issue is that Redraw() doesn't account for the fact that rect textures are non-normalized. I'm going to hack on this for a bit.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>