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Bug 603

Summary: Crash in X11_GL_GetVisual (Patch attached)
Product: SDL Reporter: couriersud
Component: videoAssignee: Ryan C. Gordon <icculus>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: major    
Priority: P2 CC: couriersud
Version: HG 2.0   
Hardware: x86   
OS: Linux   
Attachments: Patch to solve issue

Description couriersud 2008-07-06 14:53:17 UTC 
Using the following sequence

SDL_Init(..:)
SDL_CreateWindow(..., SDL_WINDOW_OPENGL)
SDL_DestroyWindow
SDL_CreateWindow(..., SDL_WINDOW_OPENGL)

SDL will crash in X11_GL_GetVisual. This is due to the fact that 
during SDL_DestroyWindow X11_GL_Shutdown was called because the last window 
has been closed.

On the next call to SDL_CreateWindow the library is still loaded and only the memory is reinitialized. Function pointers such as gl_data->glXChooseVisual will not be reinitialized.

Consequently, SDL will crash due to a NULL pointer access.

The attached patch corrects the behaviour.
Comment 1 couriersud 2008-07-06 14:56:11 UTC 
Created attachment 257 [details]
Patch to solve issue
Comment 2 Sam Lantinga 2008-08-25 19:50:36 UTC 
Thanks!

Committed revision 4047.