Here is a list of all topics with brief descriptions:

[detail level 1234]

Category SDLMixer	SDL_mixer is a library to make complicated audio processing tasks easier
Categories	You probably want to see API by Category
3D Rendering and GPU Compute	The GPU API offers a cross-platform way for apps to talk to modern graphics hardware
Basics
Application entry points	Redefine main() if necessary so that it is called by SDL
Initialization and Shutdown	All SDL programs need to initialize the library before starting to work with it
Initialization flags
Configuration Variables	This file contains functions to set and get configuration hints, as well as listing each of them alphabetically
Object Properties	A property is a variable that can be created and retrieved by name at runtime
Error Handling	Simple error message routines for SDL
Log Handling	Simple log messages with priorities and categories
Assertions	A helpful assertion macro!
Querying SDL Version	Functionality to query the current SDL version, both as headers the app was compiled against, and a library the app is linked to
Video
Display and Window Management	SDL's video subsystem is largely interested in abstracting window management from the underlying operating system
2D Accelerated Rendering	Header file for SDL 2D rendering functions
Pixel Formats and Conversion Routines	SDL offers facilities for pixel management
Blend modes	Blend modes decide how two colors will mix together
Rectangle Functions	Some helper functions for managing rectangles and 2D points, in both integer and floating point versions
Surface Creation and Simple Drawing	SDL surfaces are buffers of pixels in system RAM
Clipboard Handling	SDL provides access to the system clipboard, both for reading information from other processes and publishing information of its own
Vulkan Support	Functions for creating Vulkan surfaces on SDL windows
Metal Support	Functions to creating Metal layers and views on SDL windows
Camera Support	Video capture for the SDL library
Force Feedback Support	The SDL haptic subsystem manages haptic (force feedback) devices
Audio Playback, Recording, and Mixing	Audio functionality for the SDL library
Input Events
Event Handling	Event queue management
Event Types	Event types for Event
Keyboard Support	SDL keyboard management
Keyboard Keycodes	Defines constants which identify keyboard keys and modifiers
Keyboard Scancodes	Defines keyboard scancodes
Mouse Support	Any GUI application has to deal with the mouse, and SDL provides functions to manage mouse input and the displayed cursor
Joystick Support	SDL joystick support
Gamepad Support	SDL provides a low-level joystick API, which just treats joysticks as an arbitrary pile of buttons, axes, and hat switches
Touch Support	SDL offers touch input, on platforms that support it
Pen Support	SDL pen event handling
Sensors	SDL sensor management
HIDAPI	Header file for SDL HIDAPI functions
Threads	This is provided for compatibility and completeness, we advise you to use std's thread facilities
Thread Management	SDL offers cross-platform thread management functions
Thread Synchronization Primitives	SDL offers several thread synchronization primitives
Atomic Operations	Atomic operations
Time
Timer Support	SDL provides time management functionality
Date and Time	SDL realtime clock and date/time routines
File and I/O Abstractions
Filesystem Access	SDL offers an API for examining and manipulating the system's filesystem
Storage Abstraction	The storage API is a high-level API designed to abstract away the portability issues that come up when using something lower-level (in SDL's case, this sits on top of the [Filesystem](CategoryFilesystem) and [IOStream](CategoryIOStream) subsystems)
I/O Streams	SDL provides an abstract interface for reading and writing data streams
Async I/O	SDL offers a way to perform I/O asynchronously
Platform and CPU Information
Platform Detection	SDL provides a means to identify the app's platform, both at compile time and runtime
CPU Feature Detection	CPU feature detection for SDL
Compiler Intrinsics Detection	SDL does some preprocessor gymnastics to determine if any CPU-specific compiler intrinsics are available, as this is not necessarily an easy thing to calculate, and sometimes depends on quirks of a system, versions of build tools, and other external forces
Byte Order and Byte Swapping	Functions converting endian-specific values to different byte orders
Bit Manipulation	Functions for fiddling with bits and bitmasks
Additional Functionality
Shared Object/DLL Management	System-dependent library loading routines
Process Control	Process control support
Power Management Status	SDL power management routines
Message Boxes	SDL offers a simple message box API, which is useful for simple alerts, such as informing the user when something fatal happens at startup without the need to build a UI for it (or informing the user before your UI is ready)
File Dialogs	SDL offers file dialogs, to let users select files with native GUI interfaces
System Tray	SDL offers a way to add items to the "system tray" (more correctly called the "notification area" on Windows)
Locale Info	SDL locale services
Platform-specific Functionality	Platform-specific SDL API functions
Standard Library Functionality	SDL provides its own implementation of some of the most important C runtime functions
GUIDs	A GUID is a 128-bit value that represents something that is uniquely identifiable by this value: "globally unique."
Miscellaneous	SDL API functions that don't fit elsewhere
Satellite Libraries
Load images from several formats	Header file for SDL_image library
True type font support	Header file for SDL_ttf library
C++ Support
Async callback helpers	Async callback wrapper helper functions and types
Pointer wrapper to SDL::free()	Wraps SDL generated pointers to automatically freeing them
Helpers to wrap SDL Resources.	A resource is any SDL object that is created and destroyed by SDL, such as a Window, a Renderer, a Texture, etc
Helpers to use C++ strings and byte arrays.	It has StringParam to use on parameters and StringResult to have a simple std::string-like interface for SDL allocated strings