Display the blending color in GD's CropModifier

src/Drivers/Gd/Modifiers/CropModifier.php

@@ -17,32 +17,43 @@ class CropModifier extends SpecializedModifier
 {
     public function apply(ImageInterface $image): ImageInterface
     {
+        $originalSize = $image->size();
         $crop = $this->crop($image);
 
         foreach ($image as $frame) {
-            $this->cropFrame($frame, $crop);
+            $this->cropFrame($frame, $originalSize, $crop);
         }
 
         return $image;
     }
 
-    protected function cropFrame(FrameInterface $frame, SizeInterface $resizeTo): void
+    protected function cropFrame(FrameInterface $frame, SizeInterface $originalSize, SizeInterface $resizeTo): void
     {
         // create new image
         $modified = Cloner::cloneEmpty($frame->native(), $resizeTo);
 
+        // define offset
+        $offset_x = ($resizeTo->pivot()->x() + $this->offset_x);
+        $offset_y = ($resizeTo->pivot()->y() + $this->offset_y);
+
+        // define target width & height
+        $targetWidth = min($resizeTo->width(), $originalSize->width());
+        $targetHeight = min($resizeTo->height(), $originalSize->height());
+        $targetWidth = $targetWidth < $originalSize->width() ? $targetWidth + $offset_x : $targetWidth;
+        $targetHeight = $targetHeight < $originalSize->height() ? $targetHeight + $offset_y : $targetHeight;
+
         // copy content from resource
         imagecopyresampled(
             $modified,
             $frame->native(),
+            $offset_x * -1,
+            $offset_y * -1,
             0,
             0,
-            $resizeTo->pivot()->x() + $this->offset_x,
+            $targetWidth,
-            $resizeTo->pivot()->y() + $this->offset_y,
+            $targetHeight,
-            $resizeTo->width(),
+            $targetWidth,
-            $resizeTo->height(),
+            $targetHeight
-            $resizeTo->width(),
-            $resizeTo->height(),
         );
 
         // set new content as recource