Bug 9840 - Windows flicker badly when resized in -multiwindow mode

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Bugzilla Bug 9840

Windows flicker badly when resized in -multiwindow mode

Last modified: 2009-02-22 19:16:11

Bug#:	9840 alias:	Hardware:	Reporter:	Jon TURNEY <jon.turney@dronecode.org.uk>
Host:		Target:	Build:
Product:			Add CC:
Component:		Version:	CC:
Status:	RESOLVED	Priority:
Resolution:	FIXED	Severity:
Assigned To:	Cygwin/X maintainer <yselkowitz@cygwin.com>	Target Milestone:

Summary:
Keywords:

Attachment	Description	Type	Created	Actions
cygwin-multiwindow-flicker.patch	Patch to reduce resize flickering	patch	2009-02-12 18:18	Edit \| Diff
Create a New Attachment (proposed patch, testcase, etc.)			View All

Bug 9840 depends on:			Show dependency tree Show dependency graph
Bug 9840 blocks:			Show dependency tree Show dependency graph

Additional Comments:

Leave as RESOLVED FIXED
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Mark bug as VERIFIED

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Description:

Last confirmed: 0000-00-00 00:00

Opened: 2009-02-12 18:15

------- Additional Comment #1 From Jon TURNEY 2009-02-12 18:18 -------

Created an attachment (id=3733)
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.

------- Additional Comment #2 From Cygwin/X maintainer 2009-02-12 19:58 -------

Patch in the queue for 1.5.3-7.

------- Additional Comment #3 From Cygwin/X maintainer 2009-02-22 19:16 -------

Pushed in 1.5.3-7; closing.

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