URL:
<http://gna.org/bugs/?23908>
Summary: SDL2 SDL_BlitSurface Causes Crashes
Project: Battle for Wesnoth
Submitted by: wedge009
Submitted on: Mon 28 Sep 2015 08:25:50 AM UTC
Category: Bug
Severity: 5 - Blocker
Priority: 5 - Normal
Item Group: Graphics
Status: None
Privacy: Public
Assigned to: None
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 1.13.1+dev (sdl2 branch)
Operating System: Windows + Linux
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Details:
Confirmed on Windows and Linux, probably on OS X as well.
There are at least two cases I've found of SDL_BlitSurface causing crashes or
problems when building with SDL2:
* Resizing the window via mouse-drag on window border. This doesn't always
happen, but do it enough times and it should crash eventually. This instance
of SDL_BlitSurface is called from twindow:draw() (currently line 873 of
window.cpp).
* The other case is when attempting to join a MP game. It doesn't matter if
the default or experimental lobby is used. In some cases, the result is the
display corruption as seen in the attached image. On windows, in many cases, a
crash on SDL_BlitSurface happens instead. This instance is called from
draw_text_line() in font.cpp.
The SDL2 migration guide (https://wiki.libsdl.org/MigrationGuide) talks about
using textures instead of surfaces, but I think this only applies to fixed
graphics resources. There doesn't seem to be any clue provided between the
documentation for SDL_BlitSurface between SDL 1.2 and SDL 2.0 either:
https://www.libsdl.org/release/SDL-1.2.15/docs/html/sdlblitsurface.html
https://wiki.libsdl.org/SDL_BlitSurface
I tried really hard with this one, but I don't think I know enough about
graphics nor Wesnoth code to be of any help on this one beyond testing
possible fixes.
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File Attachments:
-------------------------------------------------------
Date: Mon 28 Sep 2015 08:25:50 AM UTC Name: mp.png Size: 141kB By:
wedge009
<http://gna.org/bugs/download.php?file_id=25200>
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