Fix bug in RemoveAnimationModifiers

src/Drivers/Gd/Image.php

@@ -27,6 +27,18 @@ class Image extends AbstractImage implements ImageInterface, IteratorAggregate
         //
     }
 
+    public function frames(): Collection
+    {
+        return $this->frames;
+    }
+
+    public function setFrames(Collection $frames): ImageInterface
+    {
+        $this->frames = $frames;
+
+        return $this;
+    }
+
     public function getIterator(): Traversable
     {
         return $this->frames;

src/Drivers/Gd/Modifiers/RemoveAnimationModifier.php

@@ -7,9 +7,12 @@ use Intervention\Image\Drivers\Gd\Image;
 use Intervention\Image\Exceptions\RuntimeException;
 use Intervention\Image\Interfaces\ImageInterface;
 use Intervention\Image\Interfaces\ModifierInterface;
+use Intervention\Image\Traits\CanCheckType;
 
 class RemoveAnimationModifier implements ModifierInterface
 {
+    use CanCheckType;
+
     public function __construct(protected int $position = 0)
     {
         //
@@ -21,6 +24,8 @@ class RemoveAnimationModifier implements ModifierInterface
             throw new RuntimeException('Image is not animated.');
         }
 
+        $image = $this->failIfNotClass($image, Image::class);
+
         $frames = new Collection();
         foreach ($image as $key => $frame) {
             if ($this->position == $key) {
@@ -28,6 +33,6 @@ class RemoveAnimationModifier implements ModifierInterface
             }
         }
 
-        return new Image($frames);
+        return $image->setFrames($frames);
     }
 }

src/Drivers/Imagick/Image.php

@@ -39,6 +39,13 @@ class Image extends AbstractImage implements ImageInterface, Iterator
         return $this->imagick;
     }
 
+    public function setImagick(Imagick $imagick): ImageInterface
+    {
+        $this->imagick = $imagick;
+
+        return $this;
+    }
+
     public function frame(int $position = 0): FrameInterface
     {
         foreach ($this->imagick as $core) {

src/Drivers/Imagick/Modifiers/RemoveAnimationModifier.php

@@ -3,13 +3,16 @@
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Imagick;
-use Intervention\Image\Drivers\Imagick\Image;
 use Intervention\Image\Exceptions\RuntimeException;
 use Intervention\Image\Interfaces\ImageInterface;
 use Intervention\Image\Interfaces\ModifierInterface;
+use Intervention\Image\Drivers\Imagick\Image;
+use Intervention\Image\Traits\CanCheckType;
 
 class RemoveAnimationModifier implements ModifierInterface
 {
+    use CanCheckType;
+
     public function __construct(protected int $position = 0)
     {
         //
@@ -21,15 +24,16 @@ class RemoveAnimationModifier implements ModifierInterface
             throw new RuntimeException('Image is not animated.');
         }
 
+        $image = $this->failIfNotClass($image, Image::class);
+
+        // create new imagick with just one image
         $imagick = new Imagick();
-        foreach ($image as $frame) {
+        foreach ($image->getImagick() as $key => $core) {
-            if ($frame->core()->getIteratorIndex() == $this->position) {
+            if ($key == $this->position) {
-                $imagick->addImage($frame->core()->getImage());
+                $imagick->addImage($core->getImage());
             }
         }
 
-        $image->destroy();
+        return $image->setImagick($imagick);
-
-        return new Image($imagick);
     }
 }

tests/Drivers/Gd/Modifiers/RemoveAnimationModifierTest.php

@@ -18,7 +18,8 @@ class RemoveAnimationModifierTest extends TestCase
     {
         $image = $this->createTestImage('animation.gif');
         $this->assertEquals(8, count($image));
-        $image = $image->modify(new RemoveAnimationModifier(2));
+        $result = $image->modify(new RemoveAnimationModifier(2));
         $this->assertEquals(1, count($image));
+        $this->assertEquals(1, count($result));
     }
 }

tests/Drivers/Imagick/Modifiers/RemoveAnimationModifierTest.php

@@ -18,7 +18,8 @@ class RemoveAnimationModifierTest extends TestCase
     {
         $image = $this->createTestImage('animation.gif');
         $this->assertEquals(8, count($image));
-        $image = $image->modify(new RemoveAnimationModifier(2));
+        $result = $image->modify(new RemoveAnimationModifier(2));
         $this->assertEquals(1, count($image));
+        $this->assertEquals(1, count($result));
     }
 }