<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [nouveau] garbled rendering with glamor on G71" href="https://bugs.freedesktop.org/show_bug.cgi?id=99400#c12">Comment # 12</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [nouveau] garbled rendering with glamor on G71" href="https://bugs.freedesktop.org/show_bug.cgi?id=99400">bug 99400</a> from <a class="email" href="mailto:fourdan@xfce.org" title="Olivier Fourdan <fourdan@xfce.org>"> Olivier Fourdan</a> <pre>I traced it down to the use of the text input field in gtk-demo's assistant. The issue seems to be with one particular call to glamor_poly_fill_rect_gl() with more than one prect (nrect > 1). <a href="https://cgit.freedesktop.org/xorg/xserver/tree/glamor/glamor_rects.c#n42">https://cgit.freedesktop.org/xorg/xserver/tree/glamor/glamor_rects.c#n42</a> Considering that the GLSL version is < 130 with this hardware, we are in the else case: <a href="https://cgit.freedesktop.org/xorg/xserver/tree/glamor/glamor_rects.c#n83">https://cgit.freedesktop.org/xorg/xserver/tree/glamor/glamor_rects.c#n83</a> If, in that case, with nrect > 1, we bail (to SW) then rendering is fine. But that same code gives the correct result in may other cases, with multiple rects, so it does not seem to be a bug in the glamor code though... Besides, the same code as used in Xephyr works fine. I captured the apitrace of both Xehpyr -glamor and Xwayland along with the mesa debug and glamor debug messages with: WAYLAND_DISPLAY=wayland-0 MESA_DEBUG=1,incomplete_tex,incomplete_fbo,context apitrace trace ~/local/bin/Xwayland -noreset :1 |& tee Xwayland.log & DISPLAY=:1 GDK_BACKEND=x11 gtk-demo Then same with Xephyr: DISPLAY=:0 MESA_DEBUG=1,incomplete_tex,incomplete_fbo,context apitrace trace ~/local/bin/Xephyr -glamor -noreset :1 |& tee Xephyr.log & DISPLAY=:1 GDK_BACKEND=x11 gtk-demo Mesa complains that "Texture Obj xxx incomplete because: TexImage[1] is missing" but that occurs with both Xephyr and Xwayland so I guess it should not be the problem. By logging the prect coordinates, we can match if with the apitrace dump in both cases. But again, I don't see much difference between the two (Xephyr -glamor vs. Xwayland) Logs and traces are available here: <a href="https://people.freedesktop.org/~ofourdan/bug99400/">https://people.freedesktop.org/~ofourdan/bug99400/</a></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>