[Webkit-unassigned] [Bug 41682] Certain page elements cause XGetImage and software fallback rendering

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Jul 13 07:10:15 PDT 2010


https://bugs.webkit.org/show_bug.cgi?id=41682





--- Comment #1 from Jonathan Morton <jonathan.morton at movial.com>  2010-07-13 07:10:15 PST ---
Created an attachment (id=61369)
 --> (https://bugs.webkit.org/attachment.cgi?id=61369)
Simple atlas-map test case.

Here is a simpler reproduction of one of the problems.  It consists of a small 256x128 map containing eight 64x64 icons, each of which is rendered in a separate DIV on the page.

When run with native X11 backend and tiled backing store, this causes software fallbacks which show as XGetImage calls on the tiles in use.

With a WVGA display and a large tilesize, the active tile area is 800x602.  The 602 is calculated by 8*64 + 9*10, being the heights of the DIVs and their margins.

XGetImage is extremely slow on our hardware, and we cannot avoid that situation.  Avoiding XGetImage is our goal here.

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