[Webkit-unassigned] [Bug 112245] New: --tiled-backing-store option unused

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=112245

           Summary: --tiled-backing-store option unused
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: olivier at tilloy.net


If I understand it correctly, the use of the tiled backing store is something ports opt in for statically.
The Qt port uses it by default (and thus WTF_USE_TILED_BACKING_STORE is defined to 1).

The build-webkit script has a --tiled-backing-store switch which defines ENABLE_WTF_USE_TILED_BACKING_STORE to 1, but there is no trace of checks like ENABLE(WTF_USE_TILED_BACKING_STORE) anywhere across the code base, so it looks like this switch is useless.

When building the Qt port (build-webkit --qt), passing --no-tiled-backing-store does *not* disable the use of the tiled backing store.
And the summary printed out by the configure step is rather confusing:

  Have .......................... […]
  Use ........................... tiled_backing_store […]
  Features ...................... […]

  […]

  Tiled Backing Store ........... no

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