[ SDL2 — Part 1 ] Setting up SDL2
Introduction
Note : I’m in the process of moving my old blog headerphile.com to Medium. This is mostly an experiment to see if this works better for me and to help me avoid spam comments etc. I have not been able to keep up with filtering comment so hopefully medium will help with that.
This tutorial will teach you how to program your own games using C++
and SDL2
! This first part will just teach you how to set up SDL2
. Don’t worry, it’s very easy. And when you’re done, you can jump ahead to part 2 where we will get something on screen.
This series is a little fast-paced and is mostly aimed at people who knows the basics of programming in C++
, but I will try to explain everything. The series will also explain the various types and functions inSDL2
, what they do, and what they are for. By the end of the series, you will have a good understanding of SDL2
.
During the series we will be making several small games, but I recommend that you play around with the code and have fun. The best way of learning is to experiment.
So what is SDL2?
SDL
is a cross-platform multimedia development library. You can use SDL2
to access your keyboard, for graphics, play sounds and for communication over Internet. SDl2 can also be used alongside with OpenGL
. SDL2
can create the window for OpenGL
and be used for text rendering, multiplayer and image loading.
SDL2 brings on a set of changes from SDL1.2
. First of all, SDL2
has support for hardware acceleration, which means it’ll be very fast compared to SDL1.2
. It also has an improved rendering structure with an object representing the window and an object for dealing with the rendering. I will cover these in more detail in the next post. For now, let’s just install it.
Installation
Installing SDL2
can be a bit tricky, especially on some operating systems where you might have to compile it yourself ( though this is becoming more rare. )
Linux
Linux comes in all shapes and sizes. Below are guides on how to install on most distributions of Linux.
Debian ( Ubuntu, Debian, Mint )
Depnding on your distro and version, you might be able to install SDL2 using the package manager. I.e :
sudo apt-get install libsdl2
If your package manager does have SDL2
, it will be installed and you’re done. If that fails, it might have a different name. If you cant find it, you’ll have to compile SDL2
yourself Don’t worry, it’s easy. Just follow this excellent guide :Installing SDL2 on Linux
Arch ( Manjaro, Arch, .. )
Probably the easiest. Simply use pacman
:
sudo pacman -S sdl
And that’s all, SDL2 is installed now.
Fedora
Just as easy as Arch
:
sudo yum install sdl2
Note: Since I’m not running Fedora, I haven’t been able to test this. But it should work, and if it doesn’t, feel free to post a comment.
Other distros?
If you are using other distributions, there are three things you can try.
- Simply use your package manager and see if it has
SDL2
,libsdl2
orlSDL2
or something like that. - Try Google! Yes, I know it’s kinda obvious, but chances are someone else has had the same issue, it’s worth a shot.
- If 1 and 2 doesn’t work, you could still try the guide for Debian. You will have to switch
sudo apt-get install
with the command for install packages on your distribution.
Windows
Setting up SDL2
in Windows
is a little bit more complicated, so I made a separate post for it. You can find it here
Mac
This will be the shortest guide and it will only cover homebrew
since I don’t have the access to any computer running OS X
.
In terminal simply type :
brew install SDL2
Note: Since I haven’t actually tested this, I can’t guarantee that it will work.
Testing it
Now we come to the fun part, we get to actually use it and run or SDL2
application. Our end result isn’t terribly exiting this time, it just creates an empty window with a red background. But things will get better, I promise!
Compiling on Linux and Mac using terminal
To compile on Linux
, simply add -lSDL2
to your compilation string. To compile main.cpp
you can do
clang++ main.cpp -lSDL2 -o SDLTest
If you are using GCC
, the compilation string is
g++ main.cpp -lSDL2 -o SDLTest
Compiling on Linux
and Mac
without terminal
If you’re not using the terminal, you need to set up your IDE
to use the SDL2
libraries. This should be a simple process, check the documentation for you IDE
to find exactly how to do this. I do recommend using the terminal, though. It’s much simpler.
Compiling on Windows in VisualStudio
If you have followed my guide, you shouldn’t have to do anything in order to compile.
If you get any compile errors you need to check your include directory. Remember that you should add the folder that has the SDL2
folder, but not the SDL2
folder itself. This is because the example code uses #include
If you get linker errors, make sure you have added the folder with the `SDL2.lib` file.
If you get runtime errors, make sure you have all the .dll
files in an appropriate directory.
Sample code
To test it, simply replace the content with your main.cpp
with the following code snippet. If it displays a window, SDL2
is working properly on your window. Don’t worry about the code just now, I’ll explain it in the next part.
Next part
You can find the next part here.