Run in WebAssembly about dume HOT 2 CLOSED

Hi!

The first issue that comes to mind is how the example code blocks on wgpu futures: it uses the pollster crate, which doesn't seem to be compatible with WASM. The wgpu examples use wasm-bindgen-futures instead when running on WASM (code).

I'll implement and test this change in a few hours when I have time.

Another problem on WASM will be loading images from disk—right now the example code expects them to be stored in the assets directory. In the browser, though, we can't access files, so they have to be loaded from a URL.

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It took a bit longer than expected, but I got the experimental branch working on WASM now.

Besides the aforementioned problems, it turns out WebGL doesn't support storage buffers, which I was using to pass colors to the path shader. So I changed the shader to load color data from a 1D texture emulating a storage buffer.

Let me know how it works!

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