Date: Sun, 18 Apr 2004 16:09:53 -0400 (EDT) From: David MacCormack Subject: [SDL] Linux joystick patch I recently got myself a PS2 -> USB converter (a super joybox 5). It accepts 4 PSX/PS2 controllers. It's implemented as a HID, which is nice because it doesn't require its own driver, but the problem is that it's implemented as a *single* HID -- that is, it shows up as a single joystick with 19 axes, 4 hats, and 48 buttons. This poses a problem for a number of apps which use SDL (stella, fce ultra, zsnes, to name a few) and see only a single (physical) joystick even though there are really 4 (logical) joysticks. There are a number of these types of devices on the market, and I've seen others post messages (in the zsnes forum, for example) with the same problem, so I came up with what I think is a pretty generic solution. I patched src/joystick/linux/SDL_sysjoystic.c to include support for logical joysticks; basically, it's a static array and supporting functions that map a single physical joystick to multiple logical joysticks. The attached patch has the new code. It's wrapped inside #ifndef statements so that you can get the old behavior if you want.

## Makefile.am for the main SDL library

# These are the subdirectories that are always built
CORE_SUBDIRS =			\
	main

# These are the subdirectories which may be built
EXTRA_SUBDIRS =			\
	 audio video events joystick cdrom thread timer endian file cpuinfo hermes

# These are the subdirectories which will be built now
SUBDIRS = $(CORE_SUBDIRS) @SDL_EXTRADIRS@

# These are the subdirectories which will be distributed with "make dist"
DIST_SUBDIRS = $(CORE_SUBDIRS) $(EXTRA_SUBDIRS)

# The SDL library target
lib_LTLIBRARIES = libSDL.la

libSDL_la_SOURCES = $(GENERAL_SRCS)
libSDL_la_LDFLAGS = 		\
	-no-undefined		\
        -release $(LT_RELEASE)	\
	-version-info $(LT_CURRENT):$(LT_REVISION):$(LT_AGE)
libSDL_la_LIBADD =		\
	main/libarch.la		\
	@SDL_EXTRALIBS@		\
	@SYSTEM_LIBS@
libSDL_la_DEPENDENCIES =	\
	main/libarch.la		\
	@SDL_EXTRALIBS@

# The SDL library sources
GENERAL_SRCS = 		\
	SDL.c			\
	SDL_error.c		\
	SDL_error_c.h		\
	SDL_fatal.c		\
	SDL_fatal.h		\
	SDL_getenv.c		\
	SDL_loadso.c