Bug 9840 - Windows flicker badly when resized in -multiwindow mode
Summary: Windows flicker badly when resized in -multiwindow mode
Status: RESOLVED FIXED
Alias: None
Product: cygwin
Classification: Unclassified
Component: Cygwin/X (show other bugs)
Version: unspecified
: P2 normal
Target Milestone: ---
Assignee: Yaakov Selkowitz
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2009-02-12 18:15 UTC by Jon Turney
Modified: 2009-02-22 19:16 UTC (History)
0 users

See Also:
Host:
Target:
Build:
Last reconfirmed:

Attachments
Patch to reduce resize flickering (713 bytes, patch)
2009-02-12 18:18 UTC, Jon Turney 		Details | Diff
View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Jon Turney 2009-02-12 18:15:23 UTC
Comment 1 Jon Turney 2009-02-12 18:18:35 UTC 
Created attachment 3733 [details]
Patch to reduce resize flickering

Resizing windows in rootless mode causes them to flicker very badly.  This is
because the default WM_ERASEBKGND handling occurs, which erases the entire
invalidated area with the default (white) brush, pointlessly, before the entire
invalidated area is bitblt'ed from the shadow framebuffer.

Attached patch causes WM_ERASEBKGND handling to be skippped.
Comment 2 Yaakov Selkowitz 2009-02-12 19:58:20 UTC 
Patch in the queue for 1.5.3-7.
Comment 3 Yaakov Selkowitz 2009-02-22 19:16:11 UTC 
Pushed in 1.5.3-7; closing.