<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [NV67] Incomplete implementation of OpenGL 2.1" href="https://bugs.freedesktop.org/show_bug.cgi?id=99033#c3">Comment # 3</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [NV67] Incomplete implementation of OpenGL 2.1" href="https://bugs.freedesktop.org/show_bug.cgi?id=99033">bug 99033</a> from <a class="email" href="mailto:pierre.morrow@free.fr" title="Pierre Moreau <pierre.morrow@free.fr>"> Pierre Moreau</a> <pre>Looking at the OpenGL 2.1 specification, I haven’t been able to find any extension, that was promoted to a core feature in OpenGL <= 2.1, that is not implemented by Nouveau. Some of the extensions exposed by NVIDIA are clearly not part of the OpenGL 2.1 specification, such as GL_ARB_shading_language_420pack [0], which was approved in 2011, whereas the OpenGL 2.1 specification is from Dec. 2006. I had a quick look at about 10 extensions exposed by NVIDIA but not by Nouveau, and they were mostly approved >2008. One extension, GL_EXT_framebuffer_multisample [1], was approved in 2005, but it became a core feature only in OpenGL 3.0. >From what I understand (correct me if I am wrong), OpenGL extensions, as long as they haven’t been made into a core feature, are completely optional in order to support a given OpenGL version. [0]: <a href="https://www.opengl.org/registry/specs/ARB/shading_language_420pack.txt">https://www.opengl.org/registry/specs/ARB/shading_language_420pack.txt</a> [1]: <a href="https://www.opengl.org/registry/specs/EXT/framebuffer_multisample.txt">https://www.opengl.org/registry/specs/EXT/framebuffer_multisample.txt</a></pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>