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STR #3001
| Application: | FLTK Library |
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| Status: | 5 - New |
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| Priority: | 3 - Moderate, e.g. unable to compile the software |
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| Scope: | 2 - Specific to an operating system |
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| Subsystem: | X11 |
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| Summary: | Flickering while resizing |
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| Version: | 1.3-current |
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| Created By: | andreldm |
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| Assigned To: | Unassigned |
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| Fix Version: | Unassigned |
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| Update Notification: | |
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Trouble Report Files:
[ Post File ]
Trouble Report Comments:
[ Post Text ]
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| #1 | andreldm
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:
https://groups.google.com/forum/#!topic/fltkgeneral/m5rO3QkAYo4 | |
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| #2 | greg.ercolano
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.
~~~ | |
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| #3 | 12oclocker
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)
Hardware is...
BunsenLabs Linux with OpenBox window manager
Nvidia/AMD Mobility Radeon HD 4225/4250
Some Progress...
I recompiled the FLTK source code and I disabled XDBE
--disable-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. | |
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| #4 | matt
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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