Difference between revisions of "Engine:FNA"
m (→top: replaced: http://fna-xna.github.io → https://fna-xna.github.io) |
m (→DualShock 4 Light Bar Support: Made it clear that the SetLightBarEXT extension is for developers to use, and the fix section for users. It was damn confusing at first, honestly.) |
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===DualShock 4 Light Bar Support=== | ===DualShock 4 Light Bar Support=== | ||
− | + | {{ii}} Currently only supported on Linux, with kernel 3.15 and higher or SteamOS version 137 and higher. | |
− | + | FNA supports the DualShock 4 light bar, although it requires game developers to make use of the [https://github.com/FNA-XNA/FNA/wiki/5:-FNA-Extensions#setlightbarext SetLightBarEXT] extension to set the color of the light bar by way of adjusting the brightness of the RGB LEDs. Users also needs to allow write permission to brightness files per the below instructions before the game can make use of the light bar. | |
− | + | {{Fixbox|description=For users: Enable light bar support for FNA games that supports it|fix= | |
+ | # Open a terminal window and obtain root access using e.g. <code>su root</code> or appropriate alternative. | ||
+ | # Allow write permission to the brightness files for the red/blue/green LEDs via /sys/class/leds/. For example: | ||
cd /sys/class/leds/ | cd /sys/class/leds/ | ||
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chmod 777 0003:054C:05C4.0021:blue/brightness | chmod 777 0003:054C:05C4.0021:blue/brightness | ||
− | + | '''Notes''' | |
− | + | {{ii}} The folder noted above can change per instance, but the constant value is 054C:05C4, the hardware ID for the DualShock 4. | |
− | A small test program can be found [https://gist.github.com/flibitijibibo/f86cf971046c33197560 here]. | + | {{ii}} A small test program can be found [https://gist.github.com/flibitijibibo/f86cf971046c33197560 here]. |
+ | }} |
Revision as of 15:53, 5 April 2018
Developers | |
---|---|
Ethan Lee | |
Website | |
https://fna-xna.github.io |
Information
FNA is an open source reimplementation of the Microsoft XNA Framework, specifically the 4.0 Refresh revision. It started as a branch of MonoGame called "MonoGame-SDL2".
The goal of the project is to recreate a fast, portable, and accurate XNA4 runtime library that prevents the need for code/content changes on the part of the XNA game developer. The currently supported platforms include Windows, Mac OS X and GNU/Linux, with further platform support including those supported by SDL2.
Joysticks
About XNA Joystick Support
XNA, being a Microsoft technology, centered its controller input around the Xbox 360 Controller. Because of this, the XNA API is not cleanly compatible with custom controllers, including the Xbox 360 Controller when not being read by XInput. However, a config format was developed to allow binding of joystick input values to a virtual 360 controller, which then gets read by XNA games.
Automatic Configuration: SDL_GameController
Since FNA uses SDL2 as its base library, we also get the benefit of SDL_GameController, a new subsystem added by Alfred Reynolds at Valve. This takes configurations for known controllers and automatically configures them for the virtual 360 controller, so if your controller is recognized, manual configuration is not necessary. If you run an FNA title through Steam, your controller will automatically be configured using the Big Picture Mode configuration.
About GUIDs
In addition to expanded configuration support, FNA provides the GetGUIDEXT extension that allows XNA devs to pull in a trimmed/standardized GUID string to determine the controller hardware and react accordingly. TowerFall Ascension uses this for button icon support, for example.
Consider this GUID from the PlayStation 4 controller:
// These are the strings reported by SDL2's SDL_JoystickGetGUIDString: // https://wiki.libsdl.org/SDL_JoystickGetGUIDString 4c05c405000000000000504944564944 // Windows. Note characters 1-8. 4c05000000000000c405000000000000 // OSX. Note characters 1-4 and 17-20. 030000004c050000c405000011010000 // Linux. Note characters 9-12 and 17-20. 4c05c405 // This is the GUID string returned by FNA. Get it?
For XInput controllers on Windows, the GUID string is simply 'xinput'.
DualShock 4 Light Bar Support
- Currently only supported on Linux, with kernel 3.15 and higher or SteamOS version 137 and higher.
FNA supports the DualShock 4 light bar, although it requires game developers to make use of the SetLightBarEXT extension to set the color of the light bar by way of adjusting the brightness of the RGB LEDs. Users also needs to allow write permission to brightness files per the below instructions before the game can make use of the light bar.
For users: Enable light bar support for FNA games that supports it |
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cd /sys/class/leds/ chmod 777 0003:054C:05C4.0021:red/brightness chmod 777 0003:054C:05C4.0021:green/brightness chmod 777 0003:054C:05C4.0021:blue/brightness Notes
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