/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla SVG Test Code.
 *
 * The Initial Developer of the Original Code is the Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2011
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Brian Birtles <birtles@gmail.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * ***** END LICENSE BLOCK ***** */

/*
 * Utilities for testing SVG matrices
 */

function createMatrix(a, b, c, d, e, f)
{
  var svg = document.getElementsByTagName("svg")[0];
  var m = svg.createSVGMatrix();
  m.a = a;
  m.b = b;
  m.c = c;
  m.d = d;
  m.e = e;
  m.f = f;
  return m;
}

// Lightweight dummy Matrix class for representing arrays that get passed in
function MatrixFromArray(a)
{
  this.a = a[0];
  this.b = a[1];
  this.c = a[2];
  this.d = a[3];
  this.e = a[4];
  this.f = a[5];
}

function cmpMatrix(a, b, msg)
{
  if (a.constructor === Array)
    a = new MatrixFromArray(a);
  if (b.constructor === Array)
    b = new MatrixFromArray(b);

  ok(a.a == b.a &&
     a.b == b.b &&
     a.c == b.c &&
     a.d == b.d &&
     a.e == b.e &&
     a.f == b.f,
     msg + " - got " + formatMatrix(a)
         + ", expected " + formatMatrix(b));
}

function roughCmpMatrix(a, b, msg)
{
  if (a.constructor === Array)
    a = new MatrixFromArray(a);
  if (b.constructor === Array)
    b = new MatrixFromArray(b);

  const tolerance = 1 / 65535;
  ok(Math.abs(b.a - a.a) < tolerance &&
     Math.abs(b.b - a.b) < tolerance &&
     Math.abs(b.c - a.c) < tolerance &&
     Math.abs(b.d - a.d) < tolerance &&
     Math.abs(b.e - a.e) < tolerance &&
     Math.abs(b.f - a.f) < tolerance,
     msg + " - got " + formatMatrix(a)
         + ", expected " + formatMatrix(b));
}

function formatMatrix(m)
{
  if (m.constructor != Array)
    return "(" + [m.a, m.b, m.c, m.d, m.e, m.f].join(', ') + ")";

  return "(" + m.join(', ') + ")";
}
