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Bug 5067

Summary: SDL_Quit does not call VideoQuit when video was auto-initialized via SDL_CreateWindow
Product: SDL Reporter: Jay Petacat <libsdl.org>
Component: videoAssignee: Ryan C. Gordon <icculus>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2 CC: icculus
Version: HG 2.0Keywords: target-2.0.14
Hardware: x86   
OS: Other   

Description Jay Petacat 2020-03-30 04:37:05 UTC 
When exiting testspriteminimal, my driver's VideoQuit function is not executed, even if I call SDL_Quit in the test's quit function (is it intentionally absent?). As far as I can tell, it is because the video subsystem's reference count is zero and SDL_PrivateShouldQuitSubsystem(SDL_INIT_VIDEO) returns false.

My expectation is that SDL_Quit should know what to cleanup in this situation. If a maintainer affirms this, I will attempt to develop a patch.

Tangentially, if omitting SDL_Quit is a supported scenario, how shall I ensure my VideoQuit gets executed? atexit?
Comment 1 Ryan C. Gordon 2020-06-27 01:41:12 UTC 
(In reply to Jay Petacat from comment #0)
> When exiting testspriteminimal, my driver's VideoQuit function is not
> executed, even if I call SDL_Quit in the test's quit function (is it
> intentionally absent?).

It is not intentionally absent, and I have now fixed that in https://hg.libsdl.org/SDL/rev/84dc2aca3b52

> My expectation is that SDL_Quit should know what to cleanup in this
> situation. If a maintainer affirms this, I will attempt to develop a patch.

You are correct, I think this is an oversight because most things call SDL_Init() explicitly (the attempt to recover by calling SDL_VideoInit implicitly is a leftover from SDL 1.2, and we should probably remove this behavior for SDL 2.1).

> Tangentially, if omitting SDL_Quit is a supported scenario, how shall I
> ensure my VideoQuit gets executed? atexit?

It's not a supported scenario, it was just a mistake in testspriteminimal, I assume it was deleted when cutting down testsprite2.c to not use the test framework.

Your diagnosis was correct, and I've now corrected the init call in https://hg.libsdl.org/SDL/rev/22ef6c87d061

Thanks!

--ryan.