Fixed GD thumbnailing of an image with an icc profile.

application/src/File/Thumbnailer/Gd.php

@@ -27,6 +27,11 @@ class Gd extends AbstractThumbnailer
      */
     protected $origHeight;
 
+    /**
+     * @var string The profile icc of the original image.
+     */
+    protected $icc;
+
     /**
      * Check whether the GD entension is loaded.
      *
@@ -56,6 +61,8 @@ public function setSource(TempFile $source)
                 break;
             case 'image/jpeg':
                 $origImage = imagecreatefromjpeg($sourcePath);
+                $inputPel = new \lsolesen\pel\PelJpeg($sourcePath);
+                $this->icc = $inputPel->getIcc();
                 break;
             case 'image/png':
                 $origImage = imagecreatefrompng($sourcePath);
@@ -71,6 +78,7 @@ public function setSource(TempFile $source)
         if (false === $origImage) {
             throw new Exception\CannotCreateThumbnailException;
         }
+
         $this->origImage = $origImage;
         $this->origWidth = imagesx($origImage);
         $this->origHeight = imagesy($origImage);
@@ -97,7 +105,15 @@ public function create($strategy, $constraint, array $options = [])
         }
 
         imagedestroy($tempImage);
-        return $tempFile->getTempPath();
+
+        $tempPath = $tempFile->getTempPath();
+        if ($this->icc) {
+            $outputPel = new \lsolesen\pel\PelJpeg($tempPath);
+            $outputPel->setIcc($this->icc);
+            $outputPel->saveFile($tempPath);
+        }
+
+        return $tempPath;
     }
 
     /**

composer.json

@@ -64,7 +64,8 @@
         "zendframework/zendxml": "^1.0.2",
         "omeka/composer-addon-installer": "*",
         "omeka-s-themes/default": "dev-develop",
-        "beberlei/doctrineextensions": "^1.0"
+        "beberlei/doctrineextensions": "^1.0",
+        "lsolesen/pel": "^0.9.6"
     },
     "require-dev": {
         "phpunit/phpunit": "^5.7.23 || ^6.4.4",