add background color to subdefs of transparent tiff.

bump media-alchemyst and imagine

composer.json

@@ -89,14 +89,14 @@
     "hoa/dispatcher": "~0.0",
     "hoa/router": "~2.0",
     "igorw/get-in": "~1.0",
-    "imagine/imagine": "0.9.0",
+    "imagine/imagine": "^0.10.0",
     "jms/serializer": "~0.10",
     "jms/translation-bundle": "dev-fix-2021-04-19",
     "justinrainbow/json-schema": "2.0.3 as 1.6.1",
     "league/flysystem": "^1.0",
     "league/flysystem-aws-s3-v2": "^1.0",
     "league/fractal": "dev-webgalleries#af1acc0275438571bc8c1d08a05a4b5af92c9f97 as 0.13.0",
-    "media-alchemyst/media-alchemyst": "^0.5.7",
+    "media-alchemyst/media-alchemyst": "^4.1.8",
     "monolog/monolog": "~1.3",
     "mrclay/minify": "~2.1.6",
     "neutron/process-manager": "2.0.x-dev@dev",

lib/Alchemy/Phrasea/Media/Subdef/Image.php

@@ -25,6 +25,7 @@ class Image extends Provider
     const OPTION_WATERMARK = 'watermark';
     const OPTION_WATERMARKTEXT = 'watermarktext';
     const OPTION_WATERMARKRID = 'watermarkrid';
+    const OPTION_BACKGROUNDCOLOR = 'backgroundcolor';
 
     protected $options = [];
 
@@ -41,6 +42,7 @@ public function __construct(TranslatorInterface $translator)
         $this->registerOption(new OptionType\EnumButton($this->translator->trans('Watermark'), self::OPTION_WATERMARK, array('no' => 'no', 'yes' => 'yes'), 'no'));
         $this->registerOption(new OptionType\Text($this->translator->trans('Watermark text'), self::OPTION_WATERMARKTEXT, ''));
         $this->registerOption(new OptionType\Text($this->translator->trans('Watermark Record_id'), self::OPTION_WATERMARKRID, ''));
+        $this->registerOption(new OptionType\Text($this->translator->trans('Background Color'), self::OPTION_BACKGROUNDCOLOR, ''));
     }
 
     public function getType()
@@ -69,6 +71,7 @@ public function getMediaAlchemystSpec()
         $this->spec->setStrip($this->getOption(self::OPTION_STRIP)->getValue());
         $this->spec->setFlatten($this->getOption(self::OPTION_FLATTEN)->getValue());
         $this->spec->setResolution($resolution, $resolution);
+        $this->spec->setBackgroundColor($this->getOption(self::OPTION_BACKGROUNDCOLOR)->getValue());
 
         return $this->spec;
     }

lib/classes/databox/subdef.php

@@ -159,6 +159,9 @@ protected function buildImageSubdef(SimpleXMLElement $sd)
         if ($sd->watermarkrid) {
             $image->setOptionValue(Image::OPTION_WATERMARKRID, $sd->watermarkrid);
         }
+        if ($sd->backgroundcolor) {
+            $image->setOptionValue(Image::OPTION_BACKGROUNDCOLOR, $sd->backgroundcolor);
+        }
         return $image;
     }
     /**