[Webkit-unassigned] [Bug 214945] First search on Google Maps shows black bar at top of map and blank strips through the middle

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=214945

--- Comment #4 from James Darpinian <jdarpinian at chromium.org> ---
Looking at the screenshot it appears something went wrong with tile clipping. In Google Maps tiles can be clipped using either the stencil buffer or the scissor rect. If I had to guess I would say that it is probably using the stencil buffer in this case. Each tile is assigned a unique stencil value and the stencil buffer is filled with these values in a pass that happens first, before other things are drawn. It looks to me as though there is an erroneous vertical offset being applied during the stencil pass, and then subsequent drawing of roads is being clipped incorrectly by the incorrect stencil buffer.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20200730/2dae6ac5/attachment.htm>