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Home > Programming > Programming Language > Rust Programming By Example
Rust Programming By Example
Rust Programming By Example

Rust Programming By Example: Enter the world of Rust by building engaging, concurrent, reactive, and robust applications

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Rust Programming By Example

Starting with SDL

Before starting to write the Tetris, a few things remain to be talked about, such as crates, which we'll be using a lot (and you'll be using a lot as well once you're rusting on your own!). Let's start with crates!

Understanding Rust crates

In Rust, packages (both binaries and libraries) are named crates. You can find a lot of them on crates.io. Today, we'll use the SDL2 crate in order to make our tetris, but before even thinking about this, we need to install the SDL2 library that is used by the SDL2 crate!

Installing SDL2

Before going any further, we need to install the SDL library.

Installing SDL2 on Linux

Depending on your package management tool, run the following to install SDL2 on Linux:

apt package mananger:

$ sudo apt-get install libsdl2-dev

dnf package manager:

$ sudo dnf install SDL2-devel

yum package manager:

$ yum install SDL2-devel

Once done, your SDL2 installation is ready!

Installing SDL2 on Mac

To install SDL2 on Mac, Simply run the following:

$ brew install sdl2

You're good to go!

...

Setting up your Rust project

The Rust package manager, cargo, allows us to create a new project very easily with just one command, cargo new. Let's run it as follow:

  cargo new tetris --bin

You should have a new folder tetris containing the following:

     tetris/
     |
     |- Cargo.toml
     |- src/
         |
         |- main.rs

Note that if you ran cargo new without the --bin flag, then you will have a lib.rs file instead of main.rs.

Now write this into your Cargo.toml file:

    [package]
    name = "tetris"
    version = "0.0.1"

    [dependencies]
    sdl2 = "0.30.0"

Here, we declare that our project's name is tetris, its version is 0.0.1 (it isn't really important at the moment), and that it has a dependency on the sdl2 crate.

For the versioning, Cargo follows SemVer (Semantic Versioning). It works as follows:

[major...

Rust's modules

Before going any further, we need to talk about how file hierarchy works in Rust through its modules.

The first thing to know is that files and folders are handled as modules in Rust. Consider the following:

|- src/
    |
    |- main.rs
    |- another_file.rs

If you want to declare that a module is in the another_file.rs file, you'll need to add to your main.rs file:

    mod another_file;

You will now have access to everything contained in another_file.rs (as long as it's public).

Another thing to know: you can only declare modules whose files are on the same level as your current module/file. Here's a short example to sum this up:

|- src/
    |
    |- main.rs
    |- subfolder/
        |- another_file.rs

If you try to declare a module referring to another_file.rs directly into main.rs, as shown preceding, it'll fail because there...

Tetris

Okay, we're now ready to start writing down our tetris!

First, let's fulfill our main.rs file in order to check whether everything is working as expected:

    extern crate sdl2;

    use sdl2::pixels::Color;
    use sdl2::event::Event;
    use sdl2::keyboard::Keycode;
    use std::time::Duration;
    use std::thread::sleep;

    pub fn main() {
      let sdl_context = sdl2::init().expect("SDL initialization   
      failed");
      let video_subsystem = sdl_context.video().expect("Couldn't get 
       SDL video subsystem");

      let window = video_subsystem.window("rust-sdl2 demo: Video", 800,
            600)
        .position_centered()
        .opengl()
        .build()
        .expect("Failed to create window");

      let mut canvas = window.into_canvas().build().expect("Failed to
        convert window into...

Creating a window

The previous example created a window and drew into it. Now let's see how it did that!

Before going any further, we need to import the SDL2 crate, as follows:

    extern crate sdl2;

With this, we now have access to everything it contains.

Now that we've imported sdl2, we need to initialize an SDL context:

    let sdl_context = sdl2::init().expect("SDL initialization failed");

Once done, we need to get the video subsystem:

    let video_subsystem = sdl_context.video().expect("Couldn't get SDL 
      video subsystem");

We can now create the window:

    let window = video_subsystem.window("Tetris", 800, 600)
                            .position_centered()
                            .opengl()
                            .build()
                            .expect("Failed to create window");

A few notes on...

Drawing

We now have a working window; it'd be nice to draw into it. First, we need to get the window's canvas before starting the main loop:

    let mut canvas = window.into_canvas()
                       .target_texture()
                       .present_vsync()
                       .build()
                       .expect("Couldn't get window's canvas");

A few explanations for the preceding code:

  • into_canvas transforms the window into a canvas so that we can manipulate it more easily
  • target_texture activates texture rendering support
  • present_vsync enables the v-sync (also known as vertical-synchronization) limit
  • build creates the canvas by applying all previously set parameters

Then we'll create a texture that we'll paste onto the window's canvas. First, let's get the texture creator, but before that, add this include...

Understanding Rust crates

In Rust, packages (both binaries and libraries) are named crates. You can find a lot of them on crates.io. Today, we'll use the SDL2 crate in order to make our tetris, but before even thinking about this, we need to install the SDL2library that is used by the SDL2 crate!

Installing SDL2

Before going any further, we need to install the SDL library.

Installing SDL2 on Linux

Depending on your package management tool, run the following to install SDL2 on Linux:

apt package mananger:

$ sudo apt-get install libsdl2-dev

dnf package manager:

$ sudo dnf install SDL2-devel

yum package manager:

$ yum install SDL2-devel

Once done, your SDL2 installation is ready!

Installing SDL2 on Mac

To install SDL2 on Mac, Simply run the following:

$ brew install sdl2

You're good to go!

Installing SDL2 on Windows

All these installation instructions come directly from the Rust SDL2 crate.

Windows with Build Script

A few steps will be required in order to make all of it work. Follow the guide!

  1. Download the mingw and msvc development libraries from http://www.libsdl.org/ (SDL2-devel-2.0.x-mingw.tar.gz and SDL2-devel-2.0.x-VC.zip).
  2. Unpack to folders of your choice. (You can delete it afterward.)
  3. Create the following folder structure in the same folder as your Cargo.toml:
        gnu-mingw\dll\32
       ...
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Key benefits

  • • Implement various features of Rust to build blazingly fast applications
  • • Learn to build GUI applications using Gtk-rs
  • • Explore the multi-threading aspect of Rust to tackle problems in concurrency and in distributed environments

Description

Rust is an open source, safe, concurrent, practical language created by Mozilla. It runs blazingly fast, prevents segfaults, and guarantees safety. This book gets you started with essential software development by guiding you through the different aspects of Rust programming. With this approach, you can bridge the gap between learning and implementing immediately. Beginning with an introduction to Rust, you’ll learn the basic aspects such as its syntax, data types, functions, generics, control flows, and more. After this, you’ll jump straight into building your first project, a Tetris game. Next you’ll build a graphical music player and work with fast, reliable networking software using Tokio, the scalable and productive asynchronous IO Rust library. Over the course of this book, you’ll explore various features of Rust Programming including its SDL features, event loop, File I/O, and the famous GTK+ widget toolkit. Through these projects, you’ll see how well Rust performs in terms of concurrency—including parallelism, reliability, improved performance, generics, macros, and thread safety. We’ll also cover some asynchronous and reactive programming aspects of Rust. By the end of the book, you’ll be comfortable building various real-world applications in Rust.

Who is this book for?

This book is for software developers interested in system level and application programming who are looking for a quick entry into using Rust and understanding the core features of the Rust Programming. It’s assumed that you have a basic understanding of Java, C#, Ruby, Python, or JavaScript.

What you will learn

  • • Compile and run the Rust projects using the Cargo-Rust Package manager
  • • Use Rust-SDL features such as the event loop, windows, infinite loops, pattern matching, and more
  • • Create a graphical interface using Gtk-rs and Rust-SDL
  • • Incorporate concurrency mechanism and multi-threading along with thread safety and locks
  • • Implement the FTP protocol using an Asynchronous I/O stack with the Tokio library

Product Details

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Publication date, Length, Edition, Language, ISBN-13
Publication date : Jan 11, 2018
Length: 454 pages
Edition : 1st
Language : English
ISBN-13 : 9781788470308
Category :
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Languages :
Rust
Concepts :
Programming Language

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Publication date : Jan 11, 2018
Length: 454 pages
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Language : English
ISBN-13 : 9781788470308
Category :
Programming
Languages :
Rust
Concepts :
Programming Language

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Table of Contents

12 Chapters
Basics of Rust Chevron down icon Chevron up icon
Basics of Rust
Getting to know Rust
Documentation and reference
Main function
Built-in data types
Control flow
Creating functions
Creating structures
References
Methods
Tuples
Enumerations
Pattern matching
Traits
Generics
Arrays
Macros
Summary
Starting with SDL Chevron down icon Chevron up icon
Starting with SDL
Understanding Rust crates
Installing SDL2
Setting up your Rust project
Rust's modules
Tetris
Creating a window
Drawing
Handling files
Summary
Events and Basic Game Mechanisms Chevron down icon Chevron up icon
Events and Basic Game Mechanisms
Writing Tetris
Summary
Adding All Game Mechanisms Chevron down icon Chevron up icon
Adding All Game Mechanisms
Getting started with game mechanisms
Summary
Creating a Music Player Chevron down icon Chevron up icon
Creating a Music Player
Installing the prerequisite
Creating your first window
Creating a toolbar
Improving the organization of the application
Adding tool button events
Containers
Adding a playlist
Opening MP3 files
Summary
Implementing the Engine of the Music Player Chevron down icon Chevron up icon
Implementing the Engine of the Music Player
Installing the dependencies
Decoding MP3 files
Playing music
Pausing and resuming the song
Showing the progression of the song
Improving CPU usage
Showing the song's current time
Loading and saving the playlist
Using gstreamer for playback
Summary
Music Player in a More Rusty Way with Relm Chevron down icon Chevron up icon
Music Player in a More Rusty Way with Relm
Reasons to use relm instead of gtk-rs directly
Creating a window with relm
Widget
Adding child widgets
Playlist
Adding a relm widget
Communicating between widgets
Playing music
Computing the song duration
Using relm on stable Rust
Relm widgets data binding
Summary
Understanding FTP Chevron down icon Chevron up icon
Understanding FTP
File transfer protocol
Summary
Implementing an Asynchronous FTP Server Chevron down icon Chevron up icon
Implementing an Asynchronous FTP Server
Advantages of asynchronous IO
Disadvantages of asynchronous IO
Creating the new project
Using Tokio
Using futures
Handling errors
Starting the Tokio event loop
Starting the server
Handling commands
Managing the current working directory
Setting the transfer type
Entering passive mode
Quitting
Creating directories
Removing directories
Summary
Implementing Asynchronous File Transfer Chevron down icon Chevron up icon
Implementing Asynchronous File Transfer
Listing files
Downloading a file
Uploading files
Going further!
Unit tests
Integration tests
Documentation
Documentation tests
Fuzzing tests
Summary
Rust Best Practices Chevron down icon Chevron up icon
Rust Best Practices
Rust best practices
Summary
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Rating distribution
Full star icon Full star icon Full star icon Half star icon Empty star icon 3.5
(4 Ratings)
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Emerson Chalegre Nov 15, 2020
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Very good!
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Donald A. Newell Jr. Mar 14, 2021
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Good refernce book for beginners
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Roshan Lenagala Aug 06, 2020
Full star icon Full star icon Empty star icon Empty star icon Empty star icon 2
Tried this book because it's easier to learn a new language while doing a project. The explanations are not that great. Some of the logic in the examples are not explained enough.
Amazon Verified review Amazon
Blurred May 26, 2020
Full star icon Full star icon Empty star icon Empty star icon Empty star icon 2
Just getting started with this book and I'm getting hung up on fixing broken examples in the book before even finishing chapter 2. Not sure how much of it is due to being out of date, but this is a fine example for the future of technical books: they should be published and accessible online. Technology is changing faster now than ever and will keep changing. Books like these simply aren't able to keep up.
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About the authors

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Gomez
Guillaume Gomez is an open source lover (let's keep this simple). He's a reviewer for the Rust language and a member of the GNOME organization. Guillaume lives in Paris, France.
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Profile icon Antoni Boucher
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Antoni Boucher has been enjoying programming for 10 years, especially functional and system programming. He works in the ad tech industry and strives to improve the performance and reliability of software. He contributes to multiple open source projects and is interested in system programming and compilers. Antoni lives in Montreal, Canada.
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