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What is the recommended way to pass JS objects to D when doing WASM?
My current solution is to maintain an ID <-> object mapping in JS, something like:
const mapJsToHandle = new WeakMap();
const mapHandleToJs = {};
var id = 0;
const toHandle = (x) => {
if (!mapJsToHandle.has(x))
{
id++;
mapJsToHandle.set(x, id);
mapHandleToJs[id] = new WeakRef(x);
return id;
} else {
return mapJsToHandle.get(x);
}
};
const fromHandle = (x) => {
return mapHandleToJs[x].deref();
};
which I can use like:
const drawJS = (imghandle, x, y) => {
document.ctx.drawImage(fromHandle(imghandle), x, y);
}
var img = new Image();
drawImage(toHandle(img))
============
D code
extern(C) void drawImage(int imghandle)
{
draw(imghandle, 100, 100);
}
void drawJS(int imghandle, double x, double y);
This works. But I wonder if there's some easier/better way? If I understand correctly you can only pass primitive objects and arrays across the boundaries.
