0000721: Sample position notifications cause synchronous redrawing of the sample view

ID	Project	Category	View Status	Date Submitted	Last Update

0000721	OpenMPT	User Interface	public	2015-11-07 17:10	2015-11-07 17:12

Reporter	manx	Assigned To
Priority	normal	Severity	minor	Reproducibility	always
Status	new	Resolution	open
Platform	x86	OS	Windows	OS Version	XP
Product Version	OpenMPT 1.25.03.* (old testing)

Summary	0000721: Sample position notifications cause synchronous redrawing of the sample view
Description	Depending on Windows version and GFX driver, repeated synchronous redrawing on each position notification can be really slow.
Additional Information	The relevant code path is in CViewSample::OnPlayerNotify.
Tags	No tags attached.

Has the bug occurred in previous versions?	yes
Tested code revision (in case you know it)

Date Modified	Username	Field	Change
2015-11-07 17:10	manx	New Issue
2015-11-07 17:12	manx	Note Added: 0002172

manx 2015-11-07 17:12 administrator ~0002172	Work-around for problematic systems until this gets fixed: Set hidden option [Display]GUIUpdateInterval to 16 instead of the default 0 (which by default couples the redraw interval to the soundcard update period). The unit is milliseconds, thus redrawing is limited to every 16 milliseconds this way.