How do I convert css pixels to in-game pixels?

	
// Import any other script files here, e.g.:
// import * as myModule from "./mymodule.js";

runOnStartup(async runtime =>
{
	// Code to run on the loading screen.
	// Note layouts, objects etc. are not yet available.
	
	runtime.addEventListener("beforeprojectstart", () => OnBeforeProjectStart(runtime));
});

async function OnBeforeProjectStart(runtime : IRuntime)
{
	// Code to run just before 'On start of layout' on
	// the first layout. Loading has finished and initial
	// instances are created and available to use here.
	
	runtime.globalVars.contructscale = parseFloat(getComputedStyle(document.documentElement).getPropertyValue('--construct-scale')) || 1;
}