<html> <head> <base href="https://bugs.documentfoundation.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - scrolling document canvas down & up can cause a line of text to "tear" with loss of registration, it clears when the line moves out of view far enough or view passes to a new page" href="https://bugs.documentfoundation.org/show_bug.cgi?id=139296#c41">Comment # 41</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - scrolling document canvas down & up can cause a line of text to "tear" with loss of registration, it clears when the line moves out of view far enough or view passes to a new page" href="https://bugs.documentfoundation.org/show_bug.cgi?id=139296">bug 139296</a> from <a class="email" href="mailto:spokanemagneto@gmail.com" title="spokanemagneto@gmail.com">spokanemagneto@gmail.com</a> <pre>(In reply to Telesto from <a href="show_bug.cgi?id=139296#c40">comment #40</a>) > (In reply to spokanemagneto from <a href="show_bug.cgi?id=139296#c39">comment #39</a>) > It's likely in 4.3 too, have seen it happen on macOS. However never got a > hold on it.. but looks like GDI isn't affected.. so needs testing on > Linux/macOS. > > I speculate it can not be seen in 4.4.7.2 with OpenGL enabled because some > weird timer madness.. Timer logic changed with 4.4.7.2 - 5.1 branch. Causing > the issue to be more prominent.. but lingering around earlier on. > > It appears mouse clicks are triggering a (full?) layout refresh or something > like that at some point.. With different offset of few pixels or even > rounding?? Where the backend holding a different image of the page > (shifting) compared to the 'paint buffer'. And clicking around triggers a > paint buffer invalidation/ repaint) Where the difference shows up and > incrementally resolved as screen refreshes in parts.. Leaving sometimes > artifacts. > > But well that's my invented story of someone who has actually no knowledge > the matter. Well, it sounds plausible to me, but I'm an electronic technician by vocation and only a software programmer by avocation. I have more reading to do on OpenGL as initially I came away with the notion that it was primarily used for heavy graphics usage, which I would not think would affect a word processor, so I put that aside for the time being, but maybe I should look into downloading OpenGL.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>