Differential D19168 Diff 45914 src/applications/files/PhabricatorImageTransformer.php

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Show First 20 Lines • Show All 327 Lines • ▼ Show 20 Lines	/* -( Saving Image Data )-------------------------------------------------- */
* @return string\|null PNG file as a string, or null on failure.		* @return string\|null PNG file as a string, or null on failure.
* @task save		* @task save
*/		*/
private static function saveImageDataAsPNG($image) {		private static function saveImageDataAsPNG($image) {
if (!function_exists('imagepng')) {		if (!function_exists('imagepng')) {
return null;		return null;
}		}

		// NOTE: Empirically, the highest compression level (9) seems to take
		// up to twice as long as the default compression level (6) but produce
		// only slightly smaller files (10% on avatars, 3% on screenshots).

ob_start();		ob_start();
$result = imagepng($image, null, 9);		$result = imagepng($image, null, 6);
$output = ob_get_clean();		$output = ob_get_clean();

if (!$result) {		if (!$result) {
return null;		return null;
}		}

return $output;		return $output;
}		}
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