This project is a tiny image manipulation library with four different functions and provides an efficient way to perform CPU intensive tasks.

It's written in Rust but is precompiled for Linux, macos and windows that can be called from a Ruby file through FFI.

Ruby setup

The project is already precompiled in three different c libraries (stored in lib/bin) :

1. librusty_engine.dll (windows)
2. librusty_engine.dylib (macos)
3. librusty_engine.so (linux)

Therefore if you want to use it in a ruby script you can simply install the rusty_engine gem and simply require 'rusty_engine_ffi'.

Usage

Converter

Example :

require 'rusty_engine_ffi'

RustyEngine.convert('images/input.jpg', 'images/output.jpg')

Arguments :

1. input file path
2. output path file

Slim

Example :

require 'rusty_engine_ffi'

RustyEngine.slim('images/input.jpg', 'images/output.jpg', '90', 'global', '3', 'red', '99')

Arguments :

1. input file path
2. output path file
3. probability
4. probability area
5. direction
6. colors
7. colors probabilities

Brush

Example :

require 'rusty_engine_ffi'

RustyEngine.brush('images/input.jpg', 'images/output.jpg', '90', '5', '10', '2')

Arguments :

1. input file path
2. output path file
3. probability
4. min
5. max
6. direction

Pixel sorting

Example :

require 'rusty_engine_ffi'

RustyEngine.sort('images/input.jpg', 'images/output.jpg', '1', 'true', '0', '0', '30', 'true', '60', '100', '0')

Arguments :

1. input file path
2. output path file
3. smart sorting
4. detection type
5. min
6. max
7. multiple range
8. min 2
9. max 2
10. sorting by

Development

Project architecture

• src/ contains the Rust code
• target/ contains the compiled rust code (this directory is not present in git)
• lib/ contains the files included in the gem
• lib/bin/ contains the compiled rust libraries for osx, linux and windows
• lib/rusty_engine.rb is the ruby file that uses FFI to call the libraries inside lib/bin/

Compilation

To compile this project you need the following softwares installed on you machine :

• Rust and Cargo
• Docker
• Cross

For compiling the rust code for your architecture : cargo build --release

For cross compilation, use cross :

Windows cross build --release --target x86_64-pc-windows-gnu

Linux cross build --release --target x86_64-unknown-linux-gnu

The compiled library is now available in the target/release/ directory.

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