function iek_gd_resize in Image effect kit 7

Resize an image by using the GD toolkit.

Parameters

object $image: An image object. The $image->resource, $image->info['width'], and $image->info['height'] values will be modified by this call.

array $data: An array that contains all the effect parameters. $data['width']: destination image width, in pixels. $data['height']: destination image height, in pixels. $data['blank_margin']: TRUE to show blank margin, FALSE to fulfill bg. $data['blank_margin_bg_color']: the background color of the blank margin. $data['position']: the starting position to crop the image.

Return value

bool TRUE or FALSE, based on success.

2 calls to iek_gd_resize()

iek_gd_border in ./iek.gd.inc

Add an image border by using the GD toolkit.

iek_gd_padding in ./iek.gd.inc

Add an image padding by using the GD toolkit.

File

./iek.gd.inc, line 212

GD2 toolkit for image manipulation within Drupal.

Code

function iek_gd_resize(stdClass $image, $data) {
  $debug = FALSE;

  // Resets width and height to zero if they are negative values.
  // Sees the issue: https://drupal.org/node/2141463.
  if ($data['width'] < 0 || $data['height'] < 0) {
    $image->info['width'] = 0;
    $image->info['height'] = 0;
    return TRUE;
  }
  $width = $data['width'];
  $height = $data['height'];
  $blank_margin = $data['blank_margin'];
  $blank_margin_bg_color = !empty($data['blank_margin_bg_color']) ? $data['blank_margin_bg_color'] : '#ffffff';
  $position = $data['position'];
  $dst = imagecreatetruecolor($width, $height);
  $bg_rgb = iek_image_hex2rgb($blank_margin_bg_color);
  $bg = imagecolorallocate($dst, $bg_rgb['red'], $bg_rgb['green'], $bg_rgb['blue']);
  imagefilledrectangle($dst, 0, 0, $width, $height, $bg);
  if ($blank_margin) {
    image_scale($image, $width, $height, TRUE);
  }
  else {
    $src_ratio = round($image->info['width'] / $image->info['height'], 8);
    $dst_ratio = round($width / $height, 8);
    if ($src_ratio >= 1) {
      if ($dst_ratio >= 1) {
        if ($src_ratio > $dst_ratio) {
          if ($debug) {
            dpm('Case 1');
          }
          $scaled_height = $width;
          $scaled_width = $src_ratio * $width;
        }
        else {
          if ($debug) {
            dpm('Case 2');
          }
          $scaled_width = $width;
          $scaled_height = $width / $src_ratio;
        }
      }
      else {
        if ($debug) {
          dpm('Case 3');
        }
        $scaled_height = $height;
        $scaled_width = $src_ratio * $height;
      }
    }
    else {
      if ($dst_ratio >= 1) {
        if ($debug) {
          dpm('Case 11');
        }
        $scaled_width = $width;
        $scaled_height = $width / $src_ratio;
      }
      else {
        if ($src_ratio < $dst_ratio) {
          if ($debug) {
            dpm('Case 12');
          }
          $scaled_width = $height;
          $scaled_height = $height / $src_ratio;
        }
        else {
          if ($debug) {
            dpm('Case 13');
          }
          $scaled_height = $height;
          $scaled_width = $height * $src_ratio;
        }
      }
    }
    $scaled_ratio = round($scaled_width / $scaled_height, 8);
    if ($debug) {
      dpm('$src    : ' . $image->info['width'] . 'x' . $image->info['height']);
      dpm('$dst    : ' . $width . 'x' . $height);
      dpm('$scaled : ' . $scaled_width . 'x' . $scaled_height);
      if ($src_ratio == $scaled_ratio && $scaled_width - $width >= 0 && $scaled_height - $height >= 0) {
        dpm('Good scaled:');
        dpm('$src_ratio    : ' . $src_ratio);
        dpm('$scaled_ratio : ' . $scaled_ratio);
      }
      else {
        dpm('Bad scaled:');
        dpm('$src_ratio    : ' . $src_ratio);
        dpm('$scaled_ratio : ' . $scaled_ratio);
      }
    }
    image_scale($image, $scaled_width, $scaled_height, TRUE);
  }
  switch ($position) {
    case 'coordinate':
      $src_x = $data['x'];
      $src_y = $data['y'];
      $dst_x = 0;
      $dst_y = 0;
      break;
    case 'top_left':
      $src_x = 0;
      $src_y = 0;
      $dst_x = 0;
      $dst_y = 0;
      break;
    case 'top_center':
      $src_x = -(($image->info['width'] - $width) / 2);
      $src_y = 0;
      $dst_x = 0;
      $dst_y = 0;
      break;
    case 'top_right':
      $src_x = -($image->info['width'] - $width);
      $src_y = 0;
      $dst_x = 0;
      $dst_y = 0;
      break;
    case 'middle_left':
      $src_x = 0;
      $src_y = -(($image->info['height'] - $height) / 2);
      $dst_x = 0;
      $dst_y = 0;
      break;
    case 'middle_center':
      $src_x = -(($image->info['width'] - $width) / 2);
      $src_y = -(($image->info['height'] - $height) / 2);
      $dst_x = 0;
      $dst_y = 0;
      break;
    case 'middle_right':
      $src_x = -($image->info['width'] - $width);
      $src_y = -(($image->info['height'] - $height) / 2);
      $dst_x = 0;
      $dst_y = 0;
      break;
    case 'bottom_left':
      $src_x = 0;
      $src_y = -($image->info['height'] - $height);
      $dst_x = 0;
      $dst_y = 0;
      break;
    case 'bottom_center':
      $src_x = -(($image->info['width'] - $width) / 2);
      $src_y = -($image->info['height'] - $height);
      $dst_x = 0;
      $dst_y = 0;
      break;
    case 'bottom_right':
      $src_x = -($image->info['width'] - $width);
      $src_y = -($image->info['height'] - $height);
      $dst_x = 0;
      $dst_y = 0;
      break;
    default:
      $src_x = 0;
      $src_y = 0;
      $dst_x = 0;
      $dst_y = 0;
  }
  if (!imagecopy($dst, $image->resource, $src_x, $src_y, $dst_x, $dst_y, $image->info['width'], $image->info['height'])) {
    return FALSE;
  }
  imagedestroy($image->resource);

  // Update image object.
  $image->resource = $dst;
  $image->info['width'] = $width;
  $image->info['height'] = $height;
  return TRUE;
}