WebAssembly ? about opencvjs HOT 4 CLOSED

Hi,
I have tried adapting the compilation instructions (in the readme) and adapted a few files to add WebAssembly support. The result is here: https://github.com/njor/opencvjs
The new compiled files can be found already built in the build folder here: https://github.com/njor/opencvjs/tree/master/build

from opencvjs.

Hi njor,
I'm glad to read that there now also is a webassembly version. I'm absolutely excited to test it.
I'm aware that importing wasm modules is a bit bulky at the moment (https://developer.mozilla.org/en-US/docs/WebAssembly/Loading_and_running)... So far I cannot imagine how to use the constructors (like so far "new cv.Mat()"...
Do you have a minimal working example, like define a Mat and do some operation on it?
This would surely save me immense amount of time.
Many thanks in advance...

from opencvjs.

Hi drhouse82,
The loading / initialization of the wasm module is taken care of by emscripten. The only thing you need to do is to create a global Module object with your configuration (see here for the details : https://kripken.github.io/emscripten-site/docs/api_reference/module.html), and then include the generated javascript file (cv-wasm.js) with a script tag.

You can find some examples in the test directory, and I have written a minimal working example to try and document the API slightly better, here : https://github.com/njor/opencvjs/blob/master/test/minimal-example.html
(But I am far from an expert, and am still struggling from time to time to understand the way emscripten binds stuff to JS. Oh well.)

Anyways, have fun. ^^

from opencvjs.

Hi njor,
thank you very much! works like a charm!
I somehow thought module loading was not yet ready... very nice!
Thanks again!

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