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Bug 27

Summary: Make SDL_GL_LoadLibrary() accept NULL.
Product: SDL Reporter: Ryan C. Gordon <icculus>
Component: videoAssignee: Ryan C. Gordon <icculus>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2    
Version: HG 1.2   
Hardware: All   
OS: All   

Description Ryan C. Gordon 2006-01-03 12:28:52 UTC 
Make SDL_GL_LoadLibrary() accept NULL to mean "choose a reasonable default for
the platform."

--ryan.



Sam's approval:

To: "A list for developers using the SDL library. \(includes SDL-announce\)"
<sdl@libsdl.org>
Subject: Re: [SDL] Bug with dynamic GL loading
From: Sam Lantinga <slouken@twomix.devolution.com>
Date: Sat, 10 Sep 2005 20:52:11 -0700

> > I'm inclined to think we should just explicitly say "NULL will try to
> > pick a reasonable default for the given platform" since it shouldn't
> > break any existing programs and it removes the need for those nasty
> > #ifdefs in every SDL program.

> That would be *much* better, yes. You could even make it a constant:

> #define SDL_DEFAULT_GL_LIBRARY_PATH    NULL

Sounds good to me...

        -Sam Lantinga, Software Engineer, Blizzard Entertainment
Comment 1 Ryan C. Gordon 2006-01-03 12:29:07 UTC 
Date: Tue, 22 Nov 2005 03:52:15 -0500
From: "Ryan C. Gordon" <icculus@icculus.org>
To: sdl@libsdl.org
Subject: [SDL] GL on photon, gem, dc, cybergfx...

As discussed earlier, we're changing SDL_GL_LoadLibrary() to explicitly 
consider NULL to mean "the most reasonable default library for the 
current platform" ... this means we won't have to hardcode every app to 
have:

#if WINDOWS
#define GLLIB "OPENGL32.DLL"
#elif LINUX
#define GLLIB "libGL.so.1"
#elif MACOSX
#define GLLIB "/System/Library/Frameworks/OpenGL.framework"
#else
#error please define your platform
#endif
lib = SDL_GL_LoadLibrary(GLLIB);

However, I need to know WHAT the reasonable default is for the following 
platforms:

photon
gem/ataricommon
dc (is there any real GL_LoadLibrary facility here?)
cybergfx (is there any real GL_LoadLibrary facility here?)

Thanks,
--ryan.
Comment 2 Ryan C. Gordon 2006-01-03 12:29:27 UTC 
gem/ataricommon is apparently good to go.

--ryan.
Comment 3 Ryan C. Gordon 2006-01-04 14:19:19 UTC 
Reinitiating nagging on the mailing list...

--ryan.
Comment 4 Ryan C. Gordon 2006-01-04 14:23:18 UTC 
"dc" apparently just statically links (and ignores any input to SDL_GL_LoadLibrary()).

--ryan.
Comment 5 Ryan C. Gordon 2006-01-04 14:27:17 UTC 
Oh, wait, looks like it's the same deal for cybergfx.

--ryan.
Comment 6 Ryan C. Gordon 2006-01-04 14:36:17 UTC 
Sent Mike Gorchak email, hopefully he'll know about the photon driver.

--ryan.
Comment 7 Ryan C. Gordon 2006-01-27 11:23:06 UTC 
Setting Sam as "QA Contact" on all bugs (even resolved ones) so he'll definitely be in the loop to any further discussion here about SDL.

--ryan.
Comment 8 Sam Lantinga 2006-03-09 10:08:01 UTC 
This is implemented in CVS.