@menu
* Basics::                      Initialization and other basic things.
* Window Management::           Working with the window system.
* Input::                       Keyboard, mouse, joystick input.
* Events::                      Asynchronous event handling.
* Surfaces::                    Software rendering.
* Rendering::                   Hardware accelerated rendering.
* Images::                      Loading and saving images.
* Sound::                       Sound effects and music.
* Fonts::                       Truetype and bitmap font rendering.
@end menu

@node Basics
@section Basics

@example
(use-modules (sdl2))
@end example

@deffn {Scheme Procedure} sdl-init [@var{subsystems}]
Initialize the SDL library.  This must be called before using any
other SDL procedure.

@var{subsystems} is an optional list of symbols that specifies the
subsystems to initialize.  All subsystems are initialized by default.
The possible flags are @code{timer}, @code{audio}, @code{video},
@code{haptic}, @code{game-controller}, and @code{events}.
@end deffn

@deffn {Scheme Procedure} sdl-quit
Quit all activated SDL subsystems.  This procedure should be called
upon all exit conditions.
@end deffn

@deffn {Scheme Procedure} sdl-version
Return a three element list containing the major, minor, and patch
version of the linked SDL library.
@end deffn

@deffn {Scheme Procedure} sdl-ticks
Return the number of milliseconds since the SDL library was
initialized.
@end deffn

@node Window Management
@section Window Management

@menu
* Windows::                     Window manipulation.
* OpenGL::                      OpenGL contexts.
@end menu

@example
(use-modules (sdl2 video))
@end example

@node Windows
@subsection Windows

@node OpenGL
@subsection OpenGL

@node Input
@section Input

@menu
* Keyboard::                    Keyboard input.
* Mouse::                       Mouse input.
* Joysticks::                   Joystick input.
* Game Controllers::            Game controller input.
@end menu

@node Keyboard
@subsection Keyboard

@node Mouse
@subsection Mouse

@node Joysticks
@subsection Joysticks

@example
(use-modules (sdl2 input joystick))
@end example

@node Game Controllers
@subsection Game Controllers

@example
(use-modules (sdl2 input game-controller))
@end example

@node Events
@section Events

@example
(use-modules (sdl2 events))
@end example

@node Surfaces
@section Surfaces

@example
(use-modules (sdl2 input surface))
@end example

@node Rendering
@section Rendering

@example
(use-modules (sdl2 input render))
@end example

@node Images
@section Images

@example
(use-modules (sdl2 input image))
@end example

@node Sound
@section Sound

@example
(use-modules (sdl2 input mixer))
@end example

@node Fonts
@section Fonts

@example
(use-modules (sdl2 input ttf))
@end example