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Christoph Reichenbach 7c80ac6df7 API for pressure-sensitive pens + XInput2/Wayland 
This patch adds an API for querying pressure-
sensitive pens, cf. SDL_pen.h:
- Enumerate all pens
- Get pen capabilities, names, GUIDs
- Distinguishes pens and erasers
- Distinguish attached and detached pens
- Pressure and tilt support
- Rotation, distance, throttle wheel support
  (throttle wheel untested)
- Pen type and meta-information reporting
  (partially tested)

Pen event reporting:
- Three new event structures: PenTip, PenMotion, and
  PenButton
- Report location with sub-pixel precision
- Include axis and button status, is-eraser flag

Internal pen tracker, intended to be independent
of platform APIs, cf. SDL_pen_c.h:
- Track known pens
- Handle pen hotplugging

Automatic test:
- testautomation_pen.c

Other features:
- XInput2 implementation, incl. hotplugging
- Wayland implementation, incl. hotplugging
- Backward compatibility: pen events default to
  emulating pens with mouse ID SDL_PEN_MOUSEID
- Can be toggled via SDL_HINT_PEN_NOT_MOUSE
- Test/demo program (testpen)
- Wacom pen feature identification by pen ID

Acknowledgements:
- Ping Cheng (Wacom) provided extensive feedback
  on Wacom pen features and detection so that
  hopefully untested Wacom devices have a
  realistic chance of working out of the box.
 		2023-11-12 09:52:02 -08:00
.github ci: re-enable Intel compilers on ci 2023-11-09 18:05:15 +01:00
VisualC API for pressure-sensitive pens + XInput2/Wayland 2023-11-12 09:52:02 -08:00
VisualC-GDK API for pressure-sensitive pens + XInput2/Wayland 2023-11-12 09:52:02 -08:00
VisualC-WinRT API for pressure-sensitive pens + XInput2/Wayland 2023-11-12 09:52:02 -08:00
Xcode API for pressure-sensitive pens + XInput2/Wayland 2023-11-12 09:52:02 -08:00
android-project Fixed touch normalized coordinates 2023-11-05 06:55:39 -08:00
build-scripts SDL_migration.cocci: Added a thing for SDL_Vulkan_CreateSurface. 2023-11-06 19:16:38 -05:00
cmake Pointer as bool (libsdl-org#7214) 2023-11-09 14:18:36 -08:00
docs SDL now represents gamepad buttons as positional elements with a separate label 2023-11-10 12:21:43 -08:00
include API for pressure-sensitive pens + XInput2/Wayland 2023-11-12 09:52:02 -08:00
mingw/pkg-support/cmake build: don't add SDL3 subfolder to include path for external projects 2022-11-27 14:33:13 -08:00
src API for pressure-sensitive pens + XInput2/Wayland 2023-11-12 09:52:02 -08:00
test API for pressure-sensitive pens + XInput2/Wayland 2023-11-12 09:52:02 -08:00
wayland-protocols Add and event and flag to report when a window has been occluded 2023-07-18 16:42:05 -04:00
.clang-format Commented out syntax that causes Visual Studio 2019 to complain on every edit 2022-12-02 00:43:01 -08:00
.clang-tidy Fix size of memcpy in SDL_AudioDeviceFormatChangedAlreadyLocked 2023-08-05 14:14:45 -04:00
.editorconfig Fixed formatting for Haiku cc files 2023-01-25 03:03:41 -08:00
.gitignore Add VS code directory to gitignore 2023-07-25 23:36:14 -07:00
.wikiheaders-options sdlwiki: SDL3 advises users to include through 'SDL3/SDL.h' 2023-03-21 02:19:19 +01:00
Android.mk Always provide an implementation for all SDL3 symbols 2023-10-12 14:00:47 +02:00
BUGS.txt Cleaned up a few more Bugzilla mentions. 2021-02-12 14:46:49 -05:00
CMakeLists.txt Add SDL Video Capture, with back-end for linux/macos/ios/android 2023-11-09 08:36:23 -08:00
CREDITS.txt Use Apple's nomenclature for macOS and iOS 2022-11-25 16:00:06 -08:00
INSTALL.txt Use Apple's nomenclature for macOS and iOS 2022-11-25 16:00:06 -08:00
LICENSE.txt Updated copyright for 2023 2023-01-09 09:41:41 -08:00
README-SDL.txt More HTTPS changes in the documentation. 2017-02-16 16:52:03 -05:00
README.md Fixed typo 2023-08-31 09:32:39 -07:00
TODO.txt Fixed up legacy MoinMoin URLs at wiki.libsdl.org 2021-04-01 12:20:33 -04:00
WhatsNew.txt Removed patch note for change already in SDL 2.x 2023-07-08 09:35:42 -07:00

README.md

Simple DirectMedia Layer (SDL) Version 3.0

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. If you are migrating to SDL 3.0 from SDL 2.0, the changes are extensively documented in README-migration.md.

Enjoy!

Sam Lantinga (slouken@libsdl.org)