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STR #1675
| Application: | FLTK Library |
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| Status: | 4 - Pending |
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| Priority: | 2 - Low, e.g. a documentation error or undocumented side-effect |
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| Scope: | 2 - Specific to an operating system |
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| Subsystem: | X11 |
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| Summary: | AnsiWidget demo application does not work well on Linux/X11 |
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| Version: | 2.0-current |
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| Created By: | dejan |
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| Assigned To: | cwarrens |
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| Fix Version: | Unassigned |
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| Update Notification: | |
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Trouble Report Files:
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Trouble Report Comments:
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| #1 | dejan
02:43 May 14, 2007 |
| Looks like ansiwidget demo application does not work well on all platforms (for some reason). I have tested it on Windows, and it works well. On GNU/Linux, however (Fedora Core 6), I have a problem demonstrated on http://entropy.tmok.com/~leka/fltk/fltk-0001.png .
I have tried the latest, fresh source from our subversion repository (r5821).
Best regards! | |
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| #2 | cwarrens
05:30 Jul 01, 2007 |
| I have tracked the problem down to a few lines of code in x11/Image.cxx
I commented out these lines in Image::draw()
//if (fl_rgba_xrender_format && picture->rgb) {
//fl_xrender_draw_image(picture->rgb, pixeltype_, from, to);
//return;
//}
and these lines in Image::buffer()
// #if USE_XFT
// if (fl_rgba_xrender_format) {
// ld = w_*4;
// depth = 32;
// } else
// #endif
and the ansiwidget demo now works perfectly. I think the hard coded depth of 32 was mismatched with my systems color depth (24).
I'm not sure what the best approach is to actually make a permanent code change. I guess the above changes could break some other part of the system - or perhaps they also solve other problems :) | |
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| #3 | cwarrens
05:39 Mar 25, 2008 |
| Fixed in Subversion repository.
Updated Image::make_current() in x11/Image.cxx.
The image depth passed to Picture() must be xvisual->depth to be a valid drawing target. This depth is incompatible with fl_xrender_draw_image() so a flag was created to avoid using this function in Image::draw() | |
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