ENGCOM-21154: Add watermark processing in media application

app/code/Magento/MediaStorage/Service/ImageResize.php

@@ -257,9 +257,41 @@ private function resize(array $viewImage, string $originalImagePath, string $ori
             ]
         );
 
+        if (isset($imageParams['watermark_file'])) {
+            if ($imageParams['watermark_height'] !== null) {
+                $image->setWatermarkHeight($imageParams['watermark_height']);
+            }
+
+            if ($imageParams['watermark_width'] !== null) {
+                $image->setWatermarkWidth($imageParams['watermark_width']);
+            }
+
+            if ($imageParams['watermark_position'] !== null) {
+                $image->setWatermarkPosition($imageParams['watermark_position']);
+            }
+
+            if ($imageParams['watermark_image_opacity'] !== null) {
+                $image->setWatermarkImageOpacity($imageParams['watermark_image_opacity']);
+            }
+
+            $image->watermark($this->getWatermarkFilePath($imageParams['watermark_file']));
+        }
+
         if ($imageParams['image_width'] !== null && $imageParams['image_height'] !== null) {
             $image->resize($imageParams['image_width'], $imageParams['image_height']);
         }
         $image->save($imageAsset->getPath());
     }
+
+    /**
+     * Returns watermark file absolute path
+     *
+     * @param string $file
+     * @return string
+     */
+    private function getWatermarkFilePath($file)
+    {
+        $path = $this->imageConfig->getMediaPath('/watermark/' . $file);
+        return $this->mediaDirectory->getAbsolutePath($path);
+    }
 }