css-matrix-utils.js

function matFromEl(element) {
  var transform  = getComputedStyle(element).transform;
  
  var t = /^matrix\((\S*), (\S*), (\S*), (\S*), (\S*), (\S*)\)$/g.exec(transform),
        a = parseFloat(!t ? 1 : t[1]),
        b = parseFloat(!t ? 0 : t[2]),
        c = parseFloat(!t ? 0 : t[3]),
        d = parseFloat(!t ? 1 : t[4]),
        e = parseFloat(!t ? 0 : t[5]),
        f = parseFloat(!t ? 0 : t[6]);
    
  function getObject() {
    return {a:a, b:b, c:c, d:d, e:e, f:f};  
  } 
  
  function getArray() {
    return {a, b, c, d, e, f};
  }
  
  return {
    getObject: getObject,
    getArray: getArray
  }
  
}

function arrayMatToString(m) {
  var s = 'matrix(',
      c;
      
  for (c=0, c<m.length, c++) {
    s += m[c] + ','
  }
  
  return s;
}