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|Status:||5 - New|
|Priority:||3 - Moderate, e.g. unable to compile the software|
|Scope:||2 - Specific to an operating system|
|Summary:||Flickering while resizing|
Trouble Report Files:
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Trouble Report Comments:
[ Post Text ]
21:39 Oct 29, 2013
|While resizing a Double-Buffered Window which contains a png image(with alpha), the whole window flickers. |
I noticed that it only occurs with some Window Managers in Linux: Xfwm and Openbox.
This forum thread explains the issue in details:
18:21 Feb 06, 2017
|"Brooks" sent me the following info via email, unable to post it |
due to ISP issues:
I have confirmed [the flicker problem] extends beyond the
report listed here [in Comment #1 of STR#3001].
..and includes the attached problem_demo.cxx code,
which has notes in the comments alluding to the suspect issue.
Paraphrasing those comments here:
Altering the Fl::visual() seems to not affect the flicker issue.
e.g. FL_DOUBLE|FL_RGB vs. FL_DOUBLE|FL_INDEX.
The flicker seems to be caused by something happening
when "plastic" or "gtk+" schemes are enabled.
This happens on BusenLabs Linux (openbox window manager)
Compiled a test app using standard libgtk2.0-dev for GUI
and no flicker.
19:18 Feb 08, 2017
|More Info... |
Resize not only flickers, but glitches, with random/corrupt visuals on the window during resize. (glitch1.png and glitch2.png happen during resize and normal.png is when resize is completed)
BunsenLabs Linux with OpenBox window manager
Nvidia/AMD Mobility Radeon HD 4225/4250
I recompiled the FLTK source code and I disabled XDBE
This eliminates the Flicker and Glitches.
I thought I read that XDBE being enabled fixes issues on other systems,
if so this is not a good solution, only a fix for one particular system.
06:51 Feb 02, 2019
|This does not occur on MacOS. I'd say that this is specific to x11 or even a specific window manager on X11. ||
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