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Bug 1281

Summary: Setting SDL_GL_ACCELERATED_VISUAL is detrimental?
Product: SDL Reporter: Sagittaur <SDL>
Component: videoAssignee: Sam Lantinga <slouken>
Status: RESOLVED DUPLICATE QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2 CC: icculus
Version: 1.2.14   
Hardware: x86   
OS: Windows (All)   

Description Sagittaur 2011-08-19 06:17:17 UTC 
I call this the "red screen" bug because the symptom is a consistently red screen/window, even though the rest of the program (sound, input) seems to continue normally.  It only happens when video card is ATI, not NVIDIA, and it only happens when I set SDL_GL_ACCELERATED_VISUAL = 1.  While the "red screen" is in effect, GL_RENDERER says "GDI Generic" instead of the expected ATI/Radeon (this makes me think I am getting "software rendering"), and GL_RGBA_MODE says false when I'm expecting 32-bit color.  Problem is cured if I don't touch SDL_GL_ACCELERATED_VISUAL and accept whatever is the default.

See also:
(1) http://forums.libsdl.org/viewtopic.php?t=3015&sid=713abbb8bdcace7e667ff533e001b59f
(2) https://bugzilla.icculus.org/show_bug.cgi?id=3526
(3) http://bugzilla.libsdl.org/show_bug.cgi?id=1254

The last comment on reference (2) implies that voluntarily setting SDL_GL_ACCELERATED_VISUAL has an unintentional detrimental effect versus leaving it to default.  I wanted to bring this to attention in case this is a mistake in SDL.  I'm not looking at the SDL source (which is why I'm reporting this), so I can't comment further.
Comment 1 Ryan C. Gordon 2011-08-21 09:05:44 UTC 
I think this is a duplicate of Bug #1197.

--ryan.

*** This bug has been marked as a duplicate of bug 1197 ***