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Bug 1006 - SDL_GL_SWAP_CONTROL fix for X11
Summary: SDL_GL_SWAP_CONTROL fix for X11
Status: RESOLVED FIXED
Alias: None
Product: SDL
Classification: Unclassified
Component: video (show other bugs)
Version: 1.2.14
Hardware: All Linux
: P2 normal
Assignee: Sam Lantinga
QA Contact: Sam Lantinga
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2010-05-26 01:14 UTC by beuc
Modified: 2010-07-18 11:19 UTC (History)
1 user (show)

See Also:

Attachments
Load glXSwapIntervalMESA/SGI using glXGetProcAddress (740 bytes, text/x-c)
2010-05-26 01:14 UTC, beuc 		Details
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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!