<html> <head> <base href="https://bugs.documentfoundation.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Flicker when hovering over main menu with default rendering" href="https://bugs.documentfoundation.org/show_bug.cgi?id=105863#c76">Comment # 76</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Flicker when hovering over main menu with default rendering" href="https://bugs.documentfoundation.org/show_bug.cgi?id=105863">bug 105863</a> from <a class="email" href="mailto:vstuart.foote@utsa.edu" title="V Stuart Foote <vstuart.foote@utsa.edu>"> V Stuart Foote</a> <pre>(In reply to tone90999 from <a href="show_bug.cgi?id=105863#c75">comment #75</a>) > ... > On 5.3.7.1, it doesn't flicker, because OpenGL cannot be opened, even if the > graphics card is not in the OpenGL blacklist. However, some font may be > rendered very ugly (possibly due to the lack of OpenGL support). > On 5.4.2.2, OpenGL can be enabled, but it lags very seriously when scrolling > down the document, and the menu apparently flickers. Font rendering is > smooth. > I have also reported that with OpenGL enabled, the UI may get blurry, and a > cursor may not click on button properly even if its position is right over > the button. > ... Default rendering (Hardware Accelerated or CPU only) at 5.3.7 is routed back through GDI/GDI+ rendering, by the commit noted in <a href="show_bug.cgi?id=105863#c52">comment 52</a> and <a href="show_bug.cgi?id=105863#c58">comment 58</a>. So, 5.3.2 -> 5.3.6 had a bad DirectWrite implementation for non-openGL rendering. While commit for <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED FIXED - Scrolling with the horizontal/vertical toolbar is sluggish with OpenGL enabled" href="show_bug.cgi?id=113347">bug 113347</a> [1], to correct an implementation error with our DirectWrite font handling, has resolved some of the latency and clears up the font stamping and blurriness. Please check OpenGL rendering with a current build of 6.0.0alpha1+ master > 2017-11-03, or the 5.4.4 build. The original flickering issue as reported by Aron, <a href="show_bug.cgi?id=105863#c2">comment 2</a>, remains and is noticeable in a few areas of the UI, for example in the Help -> About dialog. But menu flickering is under control. The obnoxious flickering of 5.3.2 -> 5.3.6 and sluggish OpenGL rendering are both resolved fixed, with proviso that as non-openGL rendering is again routed through DirectWrite for font handling with some future development, some issues may return. @Aron, are you OK with closing this long issue and moving remaining issue of <a href="show_bug.cgi?id=105863#c0">comment 0</a> & <a href="show_bug.cgi?id=105863#c2">comment 2</a> to an enhancement request to implement double buffering for default rendering? =-ref-= [1] <a href="http://cgit.freedesktop.org/libreoffice/core/commit/?id=11459949e920fab6074bab85e3e1a748e9aee1ee">http://cgit.freedesktop.org/libreoffice/core/commit/?id=11459949e920fab6074bab85e3e1a748e9aee1ee</a></pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>