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STR #3001
Application: | FLTK Library |
Status: | 5 - New |
Priority: | 3 - Moderate, e.g. unable to compile the software |
Scope: | 2 - Specific to an operating system |
Subsystem: | X11 |
Summary: | Flickering while resizing |
Version: | 1.3-current |
Created By: | andreldm |
Assigned To: | Unassigned |
Fix Version: | Unassigned |
Update Notification: | |
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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