/**
* Convert PNG image using pngquant command.
*
* @param AbstractFile $file
*/
public function convertPngImage(AbstractFile $file)
{
try {
if (self::EXTENSION_PNG !== $file->getExtension()) {
return;
}
// Ignore processed file which uses original file
if ($file instanceof ProcessedFile && $file->usesOriginalFile()) {
$this->logger->debug('Do not convert processed file identical with its original file', array('file' => $inputFilePath));
return;
}
// Set input/output files for pngquant command
// Input file is the the specified file we want to quantize
// Output file is a temporary file in typo3temp directory
$inputFilePath = PATH_site . $file->getPublicUrl();
$outputFilePath = GeneralUtility::tempnam('sg_pngquant_', '.' . self::EXTENSION_PNG);
// Build command line
$cmd = $this->buildCommand($inputFilePath, $outputFilePath);
$result = CommandUtility::exec($cmd, $output, $returnValue);
if (0 === $returnValue) {
// Replace content
if ($file instanceof ProcessedFile) {
// For processed file, only convert real processed file (i.e. different than their original file)
// Temporary file is automatically removed when updating a processed file
$this->logger->debug('Update processed file', array('cmd' => $cmd));
$file->updateWithLocalFile($outputFilePath);
} elseif (!$this->confArray['keepOriginal']) {
// Convert original files according to extension configuration
// After conversion the temporary file is removed
$this->logger->debug('Update original file', array('cmd' => $cmd));
$contents = @file_get_contents($outputFilePath);
$file->setContents($contents);
}
} else {
$this->logger->error('Convert image', array('cmd' => $cmd, 'result' => $result, 'output' => $output, 'returnValue' => $returnValue));
}
} catch (\RuntimeException $e) {
$this->logger->error($e->getMessage());
}
// Remove temporary file, if exists
if (file_exists($outputFilePath)) {
$this->removeTemporaryFile($outputFilePath);
}
}