osm-static-map-generator

IMPORTANT: If you plan to use this library, then please remember to follow OpenStreetMap's Licence/Attribution Guidelines.

What is it?

A small C++ library for WebAssembly which generates a map using OpenStreetMap's raster tiles.

Why did you write it?

I have been working on React bindings for Dear Imgui and I need a C++ map component. This library will enable me to build one. That said, I figured someone else might find it useful.

Which dependencies have you used?

• leptonica
• libpng
• libtiff
• libjpeg

Why did you use leptonica for image manipulation?

Based on my research, it is battle-tested and is the only library I got to work in WebAssembly without getting too many headaches.

What inspired you when writing the library?

I came across: https://github.com/StephanGeorg/staticmaps , a brilliant library for Node.js. After porting it to the browser, replacing Sharp with Jimp, I decided to port it to WASM.

What's next in the roadmap?

• proper error handling/recovery, preferably with a retry mechanism
• tests
• throttling
• multithreading support (once I figure out how to tame pthreads in emscripten)
• coroutines (once I figure out how to make them work)