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Bug 3263

Summary: SDL_JoystickGetButton() always returns 0 for PS4 controller's "square" button
Product: SDL Reporter: Brandon <caibbor>
Component: joystickAssignee: Sam Lantinga <slouken>
Status: RESOLVED INVALID QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2    
Version: 2.0.2   
Hardware: x86   
OS: Linux   

Description Brandon 2016-02-18 00:25:35 UTC 
SDL_JoystickGetButton() will always return 0 when called on a USB wired-in Playstation 4 controller's "square" button, which is joystick index 2 as mapped when opening with SDL_GameControllerOpen().

I've confirmed that this bug does not reproduce itself when an XBox 360 controller is plugged in.

I'm on 64 bit Linux Mint, compiling a 32 but application and using 32 bit libraries.

SDL packages:
ii  libsdl2-2.0-0:i386        2.0.2+dfsg1-3ubun i386 
ii  libsdl2-dev               2.0.2+dfsg1-3ubun i386 
ii  libsdl2-mixer-2.0-0:i386  2.0.0+dfsg1-3     i386 
ii  libsdl2-mixer-dev:i386    2.0.0+dfsg1-3     i386 
ii  libsdl2-net-2.0-0:i386    2.0.0+dfsg1-2     i386 
ii  libsdl2-net-dev:i386      2.0.0+dfsg1-2     i386 
ii  libsdl2-ttf-2.0-0:i386    2.0.12+dfsg1-2    i386 
ii  libsdl2-ttf-dev:i386      2.0.12+dfsg1-2    i386 

system info:
Linux helios 3.16.0-38-generic #52~14.04.1-Ubuntu SMP Fri May 8 09:43:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Comment 1 Brandon 2016-02-18 00:29:13 UTC 
I have not noticed any other button that does this, although I have not thoroughly tested every one.

Also, the SDL input events are triggered just fine, so this doesn't appear to be a defective controller (which is also brand new). I have worked around this problem temporarily by making a simple array of bools that I change based on the SDL press/release events.
Comment 2 Brandon 2016-02-20 20:49:04 UTC 
After some investigation, it seems as though SDL_JoystickGetButton() isn't using the button mapping that the new Controller system has remapped the buttons to. I suppose there's some other function, such as SDL_ControllerGetButton or something like SDL_GetControllerMappingForJoystickButton or something.

To the google...
Comment 3 Brandon 2016-02-20 20:57:49 UTC 
I'm going on the assumption which I posted a few minutes ago and marking this as resolved/invalid.