Web assembly image converter

This repo contains a simple image converter (PNG ↔ JPG) using WASM technology and C++ code.

Features:

client-side multiplattfom C++ logic execution in browser (x86/ARM, Windows/MacOS/Linux)
extensible to other (exotic) formats like PNM or TIFF, see here (section "Supported Image Formats)

Technologies & Tools

Web assembly
Bootstrap
Emscripten compiler (em++/emcc)
VS Code

Rationale

There are various image converters on the net which can be implemented one of the following way:

send the files to the server, where the conversion logic is implemented
JS client-side conversion via canvas drawing and export functionality, see Centipede5/imageconverter.

However this implementation serves as a technology test for a particular task.

How to build

CLI

Install boost library
Build shared libraries for boost::filesystem and boost::gil
Run make build in the root directory. The executable is in build directory.

Web

Install Emscripten SDK
Activate emscripten for current terminal session (e.g. source ~/emsdk/emsdk_env.sh)
In order to build libjpeg static library go to build/include and run emconfigure ./configure and emmake make.
In the root folder: make wasm_page to build wasm artifact and corresponding .js code.
Run an HTTP server in website/
Enjoy!

License

MIT