<?php
/**
 * Copyright (C) 2019-2021 Graham Breach
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
/**
 * For more information, please contact <graham@goat1000.com>
 */

namespace Goat1000\SVGGraph;

class Image extends Shape {
  protected $element = 'image';
  protected $required = ['src', 'x', 'y'];
  protected $transform = ['width' => 'x', 'height' => 'y'];
  protected $transform_from = ['width' => 'x', 'height' => 'y'];
  protected $transform_pairs = [ ['x', 'y'] ];
  protected $attrs = ['preserveAspectRatio' => 'xMinYMin'];

  /**
   * Override to draw an image
   */
  protected function drawElement(&$graph, &$attributes)
  {
    $attributes['xlink:href'] = $attributes['src'];
    if(isset($attributes['stretch']) && $attributes['stretch'])
      $attributes['preserveAspectRatio'] = 'none';
    unset($attributes['src'], $attributes['stretch']);
    return parent::drawElement($graph, $attributes);
  }
}