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Engine:FNA

From PCGamingWiki, the wiki about fixing PC games
FNA
Engine - FNA - logo.svg
Developers
Website
First release date
Predecessor

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, GNU/Linux, and macOS, with further platform support including those supported by SDL2.

Launch Options

As of FNA 20.01, a handful of command line arguments are supported automatically by games using FNA:

Parameter Description
/enablehighdpi:1 On macOS and Wayland, attempt to use a Retina-capable window
/mojoshaderprofile:... Force a specific shader profile. Available options: glsl120, glspirv
/backbufferscalenearest:1 When scaling the game resolution, use a nearest-neighbor filter. Useful for pixel art games.
/usescancodes:1 Use scancodes for keyboard input, ignoring the user's keyboard layout
/disablelateswaptear:1 Do not use FIFO_RELAXED or EXT_swap_control_tear extension, disables adaptive VSync
/forcemailboxvsync:1 Enables triple buffering vsync with the Vulkan renderer
/glprofile:... Force a specific OpenGL profile. Available options: es3, core, compatibility
/gldevice:... Force a specific renderer. Available options: OpenGL, Vulkan, D3D11

More detailed information about these options can be found on the FNA Developer Wiki.

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. Additionally, FNA reads from a gamecontrollerdb.txt file for configurations, when it's found in the game's base directory. You can find a community-sourced database here.

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:

// This is the string reported by SDL2's SDL_JoystickGetGUIDString:
// https://wiki.libsdl.org/SDL_JoystickGetGUIDString
// Note characters 9-12 and 17-20.
030000004c050000c405000011010000
// This is the GUID string returned by FNA. Get it? 
4c05c405

For XInput controllers on Windows, the GUID string is simply 'xinput'.

Sony Light Bar Support

Previously only supported on Linux, FNA 21.01 introduced LED support for all operating systems.

FNA supports the DualShock 4 and DualSense 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.


Game Developer Publisher First release Available on
A Virus Named TOM Misfits Attic August 1, 2012
Windows
macOS (OS X)
Linux
Amorous Team Amorous Snaggletooth Studios April 13, 2018
Windows
macOS (OS X)
Linux
Apotheon Alientrap Games February 3, 2015
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macOS (OS X)
Linux
Axiom Verge Thomas Happ Games May 14, 2015
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macOS (OS X)
Linux
Bastion Supergiant Games Warner Bros. Interactive Entertainment, Supergiant Games August 16, 2011
Windows
macOS (OS X)
Linux
Before the Echo Iridium Studios October 20, 2011
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macOS (OS X)
Linux
Bleed Bootdisk Revolution November 28, 2012
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macOS (OS X)
Linux
Bleed 2 Bootdisk Revolution February 8, 2017
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macOS (OS X)
Linux
Blueberry Garden Erik Svedäng June 10, 2009
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macOS (OS X)
Linux
Brushwood Buddies Steven Colling February 17, 2016
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Linux
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CometStriker DX Iced Lizard Games January 1, 2018
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Linux
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macOS (OS X)
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Dust: An Elysian Tail Humble Hearts Microsoft Studios May 24, 2013
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macOS (OS X)
Linux
Escape Goat Magical Time Bean June 14, 2012
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macOS (OS X)
Linux
Escape Goat 2 Magical Time Bean Double Fine Productions March 24, 2014
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macOS (OS X)
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Fez Polytron Corporation, BlitWorks Trapdoor May 1, 2013
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Flinthook Tribute Games April 18, 2017
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Flotilla Blendo Games, Ethan Lee February 27, 2010
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Fossil Echo Awaceb July 8, 2016
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Full Metal Furies Cellar Door Games January 17, 2018
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macOS (OS X)
Linux
Gateways Smudged Cat Games June 22, 2012
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macOS (OS X)
Linux
Gnomoria Robotronic Games February 23, 2016
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macOS (OS X)
Linux
Growing Pains Smudged Cat Games May 28, 2014
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Hacknet Team Fractal Alligator Surprise Attack Games August 12, 2015
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MidBoss Kitsune Games May 25, 2017
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macOS (OS X)
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macOS (OS X)
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macOS (OS X)
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Reus Abbey Games May 16, 2013
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macOS (OS X)
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River City Ransom: Underground Conatus Creative February 27, 2017
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Rogue Legacy Cellar Door Games June 27, 2013
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Salt and Sanctuary Ska Studios May 17, 2016
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Shipwreck Brushfire Games February 25, 2014
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Skulls of the Shogun 17-BIT July 29, 2013
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macOS (OS X)
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Soulcaster Magical Time Bean February 10, 2012
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Soulcaster II Magical Time Bean February 10, 2012
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macOS (OS X)
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The Adventures of Shuggy Smudged Cat Games June 13, 2012
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TowerFall Ascension Extremely OK Games March 11, 2014
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Wizorb Tribute Games November 7, 2011
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Wyv and Keep: The Temple of the Lost Idol A Jolly Corpse August 14, 2013
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References