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Bug 1006

Summary: SDL_GL_SWAP_CONTROL fix for X11
Product: SDL Reporter: beuc
Component: videoAssignee: Sam Lantinga <slouken>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2 CC: beuc
Version: 1.2.14   
Hardware: All   
OS: Linux   
Attachments: Load glXSwapIntervalMESA/SGI using glXGetProcAddress

Description beuc 2010-05-26 01:14:57 UTC 
Created attachment 509 [details]
Load glXSwapIntervalMESA/SGI using glXGetProcAddress

SDL_GL_SWAP_CONTROL is reported as unsupported under X11, even when it is.

The bug is due to (AFAICT) an implementation oversight in
video/x11/SDL_x11gl.c: it tries to load 'glXSwapIntervalMESA' or
'glXSwapIntervalSGI' dynamically from '/usr/lib/libGL.so.1', while it
should load them through 'glXGetProcAddressARB'.

The following tiny patch does just that. This allows people to make tearing-less scrolling.
Comment 1 Sam Lantinga 2010-07-18 11:19:54 UTC 
This is fixed in revision 6f0706a60146, thanks!