/**
* @param PhpGdEvent $event
*/
public function verifyMemoryLimit(PhpGdEvent $event)
{
$layers = $event->getLayers();
$options = $event->getOptions();
if (!$layers[0]->has('gif.extracted')) {
return;
}
$totalFrames = count($layers[0]->get('gif.extracted'));
$width = $layers[0]->get('image.width');
$height = $layers[0]->get('image.height');
$pixels = $width * $height;
$finalWidth = $layers[0]->get('final.width');
$finalHeight = $layers[0]->get('final.height');
$finalPixels = $finalWidth * $finalHeight;
$totalPixels = $totalFrames * $finalPixels;
$limit = $this->context->getMemoryLimit($options['memory_limit']);
$peak = memory_get_peak_usage(true) + 15 * 1024 * 1024 + 3 * ($pixels + $finalPixels);
if (1000000 < $finalPixels || 57000000 < $totalPixels || $peak > $limit) {
$e = new TranslatedException('gif.animation.may.lost.as.too.many.frames.or.dimensions.too.large.%total_frames%.%dimensions%', ['%total_frames%' => $totalFrames, '%dimensions%' => $width . 'x' . $height]);
$this->extras['gif_error'] = $e->getMessage();
$layers[0]->remove('gif.extracted');
} else {
$this->extras['memory_approx'] = number_format($peak / (1024 * 1024), 2) . ' MB';
}
}
/**
* @param PhpGdEvent $event
*/
public function createImage(PhpGdEvent $event)
{
$layers = $event->getLayers();
if (!$layers[0]->has('gif.extracted')) {
return;
}
try {
$options = $event->getOptions();
$image = $this->factory->createImage($layers, $options);
$event->setImage($image);
$event->stopPropagation();
} catch (\Exception $e) {
$e = new TranslatedException('gif.animation.may.lost.due.to.corrupted.frame.data');
$this->extras['gif_error'] = $e->getMessage();
}
}
/**
* @param PhpGdEvent $event
*/
public function initExtracted(PhpGdEvent $event)
{
$options = $event->getOptions();
$layers = $event->getLayers();
if (!$options['gif_animation'] || PhpGdContext::FORMAT_GIF !== $layers[0]->get('final.format') || PhpGdContext::FORMAT_GIF !== $layers[0]->get('image.format')) {
return;
}
$fp = $layers[0]->get('image.fp');
rewind($fp);
if ('GIF89a' !== fread($fp, 6)) {
return;
}
rewind($fp);
$extracted = $this->extractor->extractFromFilePointer($fp);
if (!$extracted->isAnimated()) {
return;
}
if (!$extracted->isValid()) {
$e = new TranslatedException('gif.animation.may.lost.due.to.corrupted.frame.data');
$this->extras['gif_error'] = $e->getMessage();
return;
}
$layers[0]->set('gif.extracted', $extracted);
}
