<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [bug] Black screen running Weston master with mesa master" href="https://bugs.freedesktop.org/show_bug.cgi?id=67541#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [bug] Black screen running Weston master with mesa master" href="https://bugs.freedesktop.org/show_bug.cgi?id=67541">bug 67541</a> from <a class="email" href="mailto:ppaalanen@gmail.com" title="Pekka Paalanen <ppaalanen@gmail.com>"> Pekka Paalanen</a> <pre>I see what happened. Weston's GL renderer used to have an #ifdef GL_UNPACK_ROW_LENGTH check to check the availability of the GL_EXT_unpack_subimage extension in the GLES2 headers. The said Mesa commit renamed GL_UNPACK_ROW_LENGTH to GL_UNPACK_ROW_LENGTH_EXT. That caused the Weston build to think that GL_EXT_unpack_subimage is not available at build time, so it never compiled that code at all. However, the runtime check for GL_EXT_unpack_subimage in the GL extension string was not protected with an #ifdef, and when Weston ran, it found the extension. The end result is, that gl_renderer_flush_damage() did not do a plain glTexImage2D because GL_EXT_unpack_subimage was available, and it did not try glTexSubImage2D either because the code was not compiled. So it never uploaded the texture.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>