[Webkit-unassigned] [Bug 67009] New: Clicking causes dirty rects that may be unnecessary; this affects future optimizations.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=67009

           Summary: Clicking causes dirty rects that may be unnecessary;
                    this affects future optimizations.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: shawnsingh at chromium.org
                CC: fishd at chromium.org, vangelis at chromium.org


To reproduce:

  use the --show-paint-rects option with software compositing in chromium.
  click several times in various places on somewhere near text, and small dirty rects will appear in other places.
  eventually the pattern will become clear the dirty rect appears near your previous click, where the invisible caret was probably located.


My guess is that the problem is somewhere related to recomputeCaretRect() in WebCore/editing/FrameSelection.cpp.

So far this problem was probably insignificant, but for upcoming chromium compositor optimizations these arbitrary rects can substantially inflate the area that needs to be redrawn.

-- 
Configure bugmail: https://bugs.webkit.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.