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   1  <?php
   2  // $Id: imageapi_gd.install,v 1.8.2.1 2009/05/02 19:45:10 drewish Exp $
   3  
   4  function imageapi_gd_requirements($phase) {
   5    $requirements = array();
   6    $t = get_t();
   7   
   8    $gd = function_exists('imagegd2');
   9  
  10    if (!$gd) {
  11      $requirements['imageapi_gd'] = array(
  12        'title' =>  $t('GD library'),
  13        'value' => $t('Not installed'),
  14        'severity' => REQUIREMENT_ERROR,
  15        'description' => $t('The GD library for PHP is missing or outdated. Please check the <a href="@url">PHP image documentation</a> for information on how to correct this.', array('@url' => 'http://www.php.net/manual/en/image.setup.php')),
  16      );
  17      return $requirements;
  18    } 
  19  
  20    // report version.
  21    $info = gd_info();
  22    $requirements['imageapi_gd'] = array(
  23      'title' =>  $t('GD library'),
  24      'value' => $info['GD Version'],
  25      'severity' => REQUIREMENT_OK,
  26    );
  27  
  28    // Check image format support 
  29    foreach (array('gif', 'jpeg', 'png') as $format) {
  30      if (function_exists('imagecreatefrom'. $format)) continue;
  31      $requirements['imageapi_gd_'. $format] = array(
  32        'title' => $t('GD !format Support', array('!format' => drupal_ucfirst($format))),
  33        'value' => $t('Not installed'),
  34        'severity' => REQUIREMENT_ERROR,
  35        'description' => $t('PHP GD was not compiled with %format support.', array('%format' => $format)), 
  36      );
  37    }
  38  
  39  
  40    // check non required stuff aka not installation blockers.
  41    if ($phase == 'runtime') {
  42      if (!function_exists('imagerotate')) {
  43        $requirements['imageapi_gd_imagerotate'] = array(
  44          'title' => $t('GD Image Rotation'),
  45          'value' => $t('Low Quality / Poor Performance'),
  46          'severity' => REQUIREMENT_WARNING,
  47          'description' => $t('The installed version of PHP GD does not support image rotations. It was probably compiled using the official GD libraries from http://www.libgd.org instead of the GD library bundled with PHP. You should recompile PHP --with-gd using the bundled GD library. See: @url. An implementation of imagerotate in PHP will used in the interim.',  array('@url' => 'http://www.php.net/manual/en/image.setup.php')),
  48        );
  49      }
  50  
  51      if (!function_exists('imagefilter')) {
  52        $requirements['imageapi_gd_imagefilter'] = array(
  53          'title' => $t('GD Image Filtering'),
  54          'value' => $t('Low Quality / Poor Performance'),
  55          'severity' => REQUIREMENT_WARNING,
  56          'description' => $t('The installed version of PHP GD does not support image filtering(desaturate, blur, negate, etc). It was probably compiled using the official GD libraries from http://www.libgd.org instead of the GD library bundled with PHP. You should recompile PHP --with-gd using the bundled GD library. See @url. An implementation of imagefilter in PHP will be used in the interim.',  array('@url' => 'http://www.php.net/manual/en/image.setup.php')),
  57        );
  58      }
  59  
  60      // Test the 'memory_limit' PHP configuration directive
  61      $memory_limit = ini_get('memory_limit');
  62  
  63      // If $memory_limit contains a value of -1, the PHP runtime
  64      // doesn't impose a limit on memory used by PHP scripts
  65      if ($memory_limit && $memory_limit != -1 && parse_size($memory_limit) < parse_size('96M')) {
  66        $requirements['imagecache_memory_limit'] = array(
  67          'title' => $t('ImageAPI GD Memory Limit'),
  68          'value' => $memory_limit,
  69          'severity' => REQUIREMENT_WARNING,
  70          'description' => $t('It is highly recommended that you set you PHP memory_limit to 96M to use ImageAPI GD. A 1600x1200 images consumes ~45M of memory when decompressed and there are instances where ImageAPI GD is operating on two decompressed images at once.'),
  71        );
  72      }
  73  
  74    }
  75    return $requirements;
  76  }
  77  
  78  /**
  79   * Implementation of hook_uninstall().
  80   */
  81  function imageapi_gd_uninstall() {
  82    variable_del('imageapi_jpeg_quality');
  83  }