/**
* @param string $fileName
* @return ImageInfo
* @throws ImageProcessorException
*/
protected function getImageInfo($fileName)
{
$info = new ImageInfo($fileName);
if ($info->hasError()) {
throw new ImageProcessorException('File ' . $fileName . ' not found or is not readable. ' . $info->getError());
}
return $info;
}
/**
* Get full image info (dimesions, mime-type etc)
*
* @param string $filename
* @return ImageInfo
*/
public function getImageInfo($filename)
{
if ($filename instanceof Image) {
$filename = $this->adapter->getFileStorage()->getImagePath($filename);
}
$info = new ImageInfo($filename);
if ($info->hasError()) {
throw new ImageProcessorException('File ' . $filename . ' not found or is not readable. ' . $info->getError());
}
return $info;
}
/**
* Validates file size
* @param Entity\File $file
*/
public function validateFile(Entity\File $file, $sourceFilePath = null)
{
if (!$file instanceof Entity\Image) {
return;
}
if (is_null($sourceFilePath)) {
return;
}
$info = new ImageInfo($sourceFilePath);
if ($info->hasError()) {
throw new Exception\RuntimeException($info->getError());
}
// Assumes memory_limit is in MB
// "-1" means no limit
$memoryLimit = (int) ini_get('memory_limit');
if ($memoryLimit < 0) {
return;
}
$memoryLeft = (int) $memoryLimit * 1024 * 1024 - memory_get_usage();
// Should use real usage or not?
// Read data from image info, default bitsPerChannel to 8, channel count to 4
$memoryRequired = $info->getWidth() * $info->getHeight() * ($info->getBits() ?: 8) * ($info->getChannels() ?: 4) * 2;
if ($memoryRequired > $memoryLeft) {
$message = "Not enough memory [{$memoryLeft} bytes] to resize the image, required amount [{$memoryRequired} bytes]";
throw new Exception\InsufficientSystemResources(self::EXCEPTION_MESSAGE_KEY, $message);
}
}
/**
* Is current image format supported by image processor
* @param string $filename Path to file
*/
public function isSupportedImageFormat($filename)
{
$info = new ImageInfo($filename);
if ($info->hasError()) {
$this->container->getLogger()->error($info->getError());
return false;
}
if (!$this->isMimeTypeImage($info->getMime())) {
return false;
}
return ImageProcessor\ImageProcessor::isSupportedImageType($info->getType());
}
