function FMDiskFileSystem::getImagePreview in N1ED - Visual editor as CKEditor plugin with Bootstrap support 7

Overrides IFMDiskFileSystem::getImagePreview

File

vendor/edsdk/flmngr-server-php/src/fs/FMDiskFileSystem.php, line 517

Class

FMDiskFileSystem

Namespace

EdSDK\FlmngrServer\fs

Code

function getImagePreview($filePath, $width, $height) {
  $fullPath = $this
    ->getAbsolutePath($filePath);
  $hash = md5($filePath . $width . $height . filesize($fullPath) . filemtime($fullPath));
  if (!file_exists($this->dirCache)) {
    if (!mkdir($this->dirCache)) {
      throw new MessageException(FMMessage::createMessage(FMMessage::FM_UNABLE_TO_CREATE_DIRECTORY));
    }
  }
  $fileCachedPath = $this->dirCache . '/' . $hash . '.png';
  if (!file_exists($fileCachedPath)) {
    $image = NULL;
    switch (FMDiskFileSystem::getMimeType($fullPath)) {
      case 'image/gif':
        $image = @imagecreatefromgif($fullPath);
        break;
      case 'image/jpeg':
        $image = @imagecreatefromjpeg($fullPath);
        break;
      case 'image/png':
        $image = @imagecreatefrompng($fullPath);
        break;
      case 'image/bmp':
        $image = @imagecreatefromwbmp($fullPath);
        break;
      case 'image/webp':

        // If you get problems with WEBP preview creation, please consider updating GD > 2.2.4
        // https://stackoverflow.com/questions/59621626/converting-webp-to-jpeg-in-with-php-gd-library
        $image = @imagecreatefromwebp($fullPath);
        break;
      case 'image/svg+xml':
        return [
          "image/svg+xml",
          fopen($fullPath, 'rb'),
        ];
    }

    // Somewhy it can not read ONLY SOME JPEG files, we've caught it on Windows + IIS + PHP
    // Solution from here: https://github.com/libgd/libgd/issues/206
    if (!$image) {
      $image = imagecreatefromstring(file_get_contents($fullPath));
    }

    // end of fix
    if (!$image) {
      throw new MessageException(Message::createMessage(Message::IMAGE_PROCESS_ERROR));
    }
    imagesavealpha($image, TRUE);

    // TODO:
    // throw new MessageException(FMMessage.createMessage(FMMessage.FM_UNABLE_TO_CREATE_PREVIEW));
    $imageInfo = FMDiskFileSystem::getImageInfo($fullPath);
    $ratio_thumb = $width / $height;

    // ratio thumb
    $xx = $imageInfo->width;
    $yy = $imageInfo->height;
    $ratio_original = $xx / $yy;

    // ratio original
    if ($ratio_original >= $ratio_thumb) {
      $yo = $yy;
      $xo = ceil($yo * $width / $height);
      $xo_ini = ceil(($xx - $xo) / 2);
      $xy_ini = 0;
    }
    else {
      $xo = $xx;
      $yo = ceil($xo * $height / $width);
      $xy_ini = ceil(($yy - $yo) / 2);
      $xo_ini = 0;
    }
    $resizedImage = imagecreatetruecolor($width, $height);
    imagecopyresampled($resizedImage, $image, 0, 0, $xo_ini, $xy_ini, $width, $height, $xo, $yo);
    if (imagepng($resizedImage, $fileCachedPath) === FALSE) {
      throw new MessageException(FMMessage::createMessage(FMMessage::FM_UNABLE_TO_WRITE_PREVIEW_IN_CACHE_DIR, $fileCachedPath));
    }
  }
  $f = fopen($fileCachedPath, 'rb');
  if ($f) {
    return [
      "image/png",
      $f,
    ];
  }
  throw new MessageException(FMMessage::createMessage(FMMessage::FM_FILE_DOES_NOT_EXIST));
}