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Sam Lantinga d3c21666de gamepad: Clarify range and direction of axes 
It would be easy to assume that all APIs that reference
SDL_JOYSTICK_AXIS_MAX work the same way, but they do not: triggers
generally use the full signed 16-bit range in the lower-level joystick
API, but are normalized to be non-negative by the higher-level gamepad
API.

We also never said explicitly which direction is positive here.
Experimentally, it's right (X), down (Y), and pressed (triggers).

Resolves: https://github.com/libsdl-org/SDL/issues/8793
Signed-off-by: Simon McVittie <smcv@collabora.com>

(cherry picked from commit 059fb560ba)
 		2024-01-08 09:48:04 -08:00
.github ci: re-enable Intel compilers on ci 2023-11-09 18:07:10 +01:00
VisualC Added Steam Input API support for game controllers 2023-12-20 13:29:57 -08:00
VisualC-GDK Updated copyright for 2024 2024-01-01 13:19:49 -08:00
VisualC-WinRT Added Steam Input API support for game controllers 2023-12-20 13:29:57 -08:00
Xcode Updated copyright for 2024 2024-01-01 13:19:49 -08:00
Xcode-iOS/Demos [SDL2] pointer boolean (#8523) 2023-11-10 06:30:56 -08:00
acinclude autotools: revised and silenced esound detection a bit. 2022-09-24 20:01:04 +03:00
android-project Added a runtime check for BLUETOOTH_CONNECT in addition to BLUETOOTH (thanks @perepujal!) 2023-12-24 06:51:48 -08:00
android-project-ant
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build-scripts Updated copyright for 2024 2024-01-01 13:19:49 -08:00
cmake cmake: check if CMP0087 exists before setting it (#8613) 2023-11-25 21:42:55 +00:00
docs cmake: fix uses of undefined macro identifiers (-Wundef) 2023-11-17 03:06:26 +00:00
include gamepad: Clarify range and direction of axes 2024-01-08 09:48:04 -08:00
mingw/pkg-support/cmake cmake: else() does not need an argument 2022-10-20 13:29:35 +02:00
src Updated documentation for SDL_HINT_SHUTDOWN_DBUS_ON_QUIT 2024-01-07 14:24:56 -08:00
test Updated copyright for 2024 2024-01-01 13:19:49 -08:00
visualtest Remove unneeded semicolon 2022-11-17 10:43:45 +01:00
wayland-protocols Support wayland fractional scale protocol 2022-11-29 16:37:02 -05:00
.clang-format Commented out syntax that causes Visual Studio 2019 to complain on every edit 2022-12-02 00:43:46 -08:00
.editorconfig editorconfig: remove trailing whitespace in source code 2022-12-26 10:34:45 -08:00
.gitignore cmake: use FindALSA.cmake to find ALSA library 2022-12-11 23:23:45 +01:00
.wikiheaders-options wikiheaders: Bridge README files in the docs directory to wiki. 2023-02-28 11:46:46 -05:00
Android.mk Fixed building with the 16.1.4479499 Android toolchain 2023-06-03 23:55:56 -07:00
BUGS.txt
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CMakeLists.txt Use common generic syscond for platforms with no cond implementation 2023-12-24 06:35:59 -08:00
CREDITS.txt
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INSTALL.txt
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LICENSE.txt Updated copyright for 2024 2024-01-01 13:19:49 -08:00
Makefile.in added missing FGREP to Makefile.in. fixed syntax. regenerated configure. 2022-11-24 17:00:20 +03:00
Makefile.minimal Split up CFLAGS construction so it can be overridden 2023-03-29 07:26:34 -07:00
Makefile.os2 Makefile.os2: -DSDL_USE_LIBICONV to fix linkage for GNU libiconv option 2023-12-21 08:55:04 +03:00
Makefile.pandora
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Makefile.w32 fix os/2 and watcom builds after commit 7bb0e839a6 2023-12-21 01:11:24 +03:00
README-SDL.txt
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README.md
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SDL2.spec.in
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SDL2Config.cmake.in cmake: use FindALSA.cmake to find ALSA library 2022-12-11 23:23:45 +01:00
TODO.txt
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WhatsNew.txt Added patch note for SDL_GDKGetDefaultUser() 2023-11-02 09:59:25 -07:00
autogen.sh Simplified autogen.sh, thanks to @smcv for the tip 2022-05-05 11:54:24 -07:00
cmake_uninstall.cmake.in
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configure autotools: fix actually wrong use of AC_MSG_RESULT 2023-11-24 14:37:40 +03:00
configure.ac autotools: fix actually wrong use of AC_MSG_RESULT 2023-11-24 14:37:40 +03:00
sdl2-config-version.cmake.in Add documentation to autotoo'ls sdl2-config-version.cmake.in 2022-05-31 00:10:55 +02:00
sdl2-config.cmake.in cmake: allow users of sdl2-config.cmake to not add -mwindows to the link options 2023-04-18 14:10:12 -04:00
sdl2-config.in Revert "sdl2-config.in: Deprecate sdl2-config" 2022-11-18 06:53:13 -08:00
sdl2.m4 sdl2.m4: Call $PKG_CONFIG rather than hard-coding pkg-config 2024-01-01 08:27:02 -08:00
sdl2.pc.in cmake: use FindALSA.cmake to find ALSA library 2022-12-11 23:23:45 +01:00

README.md

Simple DirectMedia Layer (SDL) Version 2.0

https://www.libsdl.org/

Simple DirectMedia Layer is a cross-platform development library designed to provide low level access to audio, keyboard, mouse, joystick, and graphics hardware via OpenGL and Direct3D. It is used by video playback software, emulators, and popular games including Valve's award winning catalog and many Humble Bundle games.

More extensive documentation is available in the docs directory, starting with README.md

Enjoy!

Sam Lantinga (slouken@libsdl.org)