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Bug 1107

Summary: SDL_WINDOWEVENT_RESIZED doesn't restore GL context
Product: SDL Reporter: Vern Jensen <vern>
Component: eventsAssignee: Sam Lantinga <slouken>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: minor    
Priority: P2    
Version: HG 2.0   
Hardware: x86   
OS: Mac OS X 10.6   

Description Vern Jensen 2011-01-25 14:59:19 UTC 
Previously, using an older version of SDL 1.3 from May 2010, I had no trouble with this. But with the latest SDL 1.3-5080, I've found I must call SDL_GL_MakeCurrent() after I get an SDL_WINDOWEVENT_RESIZED event, prior to making glViewport() or whatnot calls, otherwise those calls will have no effect.

Maybe SDL should automatically restore the GL context to what it was prior to issuing the resize event? (Particularly if there was only one context.) Or, at a minimum, add documentation for SDL_WINDOWEVENT_RESIZED that makes it clear the user must restore the GL context before making GL calls after receiving this event.
Comment 1 Sam Lantinga 2011-02-16 03:17:53 UTC 
I just did a bunch of work with the OpenGL context management and resizing.  Can you try this with the latest snapshot?
http://www.libsdl.org/tmp/SDL-1.3.zip

Thanks!
Comment 2 Vern Jensen 2011-02-16 14:00:38 UTC 
Yes, SDL now restores the GL context properly.
Comment 3 Sam Lantinga 2011-02-16 14:20:27 UTC 
Great! :)