Image Sizing

gistfile1.js

min = function( a, b ) {
	return a > b ? b : a;
};

max = function( a, b) {
	return a > b ? a : b;
};

coverDimensions = function ( child_w, child_h, container_w, container_h ) {
	var scale_factor = max( container_w / child_w, container_h / child_h );

	return {
		width: child_w * scale_factor,
		height: child_h * scale_factor
	};
};

containDimensions = function ( child_w, child_h, container_w, container_h ) {
	var scale_factor = min( container_w / child_w, container_h / child_h );

	return {
		width: child_w * scale_factor,
		height: child_h * scale_factor
	};
};