From: Alexander Ebert <ebert@woltlab.com>
Date: Sat, 12 Dec 2020 17:41:36 +0000 (+0100)
Subject: Greatly improve the performance of GIF processing with ImageMagick
X-Git-Tag: 5.3.2~42^2~1
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0799fd01f305c95adb3b531f80bee709b0b3eb8f;p=GitHub%2FWoltLab%2FWCF.git

Greatly improve the performance of GIF processing with ImageMagick
---

diff --git a/wcfsetup/install/files/lib/system/image/adapter/ImagickImageAdapter.class.php b/wcfsetup/install/files/lib/system/image/adapter/ImagickImageAdapter.class.php
index 38754775df..e690e2a618 100644
--- a/wcfsetup/install/files/lib/system/image/adapter/ImagickImageAdapter.class.php
+++ b/wcfsetup/install/files/lib/system/image/adapter/ImagickImageAdapter.class.php
@@ -356,6 +356,16 @@ class ImagickImageAdapter implements IImageAdapter {
 			fclose($file);
 		}
 		else {
+			// Greatly reduces the time required to create the image and drastically
+			// reduces the filesize to more reasonable levels without a visible
+			// quality loss.
+			//
+			// See https://github.com/Imagick/imagick/issues/360
+			if ($image->getImageFormat() == 'GIF') {
+				$image = $image->deconstructImages();
+				$image->quantizeImages(256, \Imagick::COLORSPACE_SRGB, 0, false, false);
+			}
+			
 			$image->writeImages($filename, true);
 		}
 	}