Make filterQuality configurable

lib/src/flip_card.dart

@@ -84,6 +84,7 @@ class FlipCard extends StatefulWidget {
     this.fill = Fill.none,
     this.initialSide = CardSide.front,
     this.autoFlipDuration,
+    this.filterQuality,
   });
 
   /// The initially shown side of the card
@@ -112,6 +113,9 @@ class FlipCard extends StatefulWidget {
   /// {@macro flip_card.FlipCardTransition.fill}
   final Fill fill;
 
+  /// {@macro flip_card.FlipTransition.filterQuality}
+  final FilterQuality? filterQuality;
+
   /// When enabled, the card will flip automatically when touched. This behavior
   /// can be disabled if this is not desired.
   ///
@@ -315,6 +319,7 @@ class FlipCardState extends State<FlipCard>
       direction: widget.direction,
       fill: widget.fill,
       alignment: widget.alignment,
+      filterQuality: widget.filterQuality,
     );
 
     /// if we need to flip the card on taps, wrap the content

lib/src/flip_card_transition.dart

@@ -22,6 +22,7 @@ class FlipCardTransition extends StatefulWidget {
     this.alignment = Alignment.center,
     this.frontAnimator,
     this.backAnimator,
+    this.filterQuality,
   });
 
   /// {@template flip_card.FlipCardTransition.front}
@@ -52,6 +53,9 @@ class FlipCardTransition extends StatefulWidget {
   /// {@endtemplate}
   final Alignment alignment;
 
+  /// {@macro flip_card.FlipTransition.filterQuality}
+  final FilterQuality? filterQuality;
+
   /// The [Animatable] used to animate the front side
   final Animatable<double>? frontAnimator;
 
@@ -161,6 +165,7 @@ class _FlipCardTransitionState extends State<FlipCardTransition> {
             : (widget.backAnimator ?? FlipCardTransition.defaultBackAnimator)
                 .animate(widget.animation),
         direction: widget.direction,
+        filterQuality: widget.filterQuality,
         child: child,
       ),
     );
@@ -177,6 +182,7 @@ class FlipTransition extends AnimatedWidget {
     required this.child,
     required this.animation,
     required this.direction,
+    required this.filterQuality,
   }) : super(listenable: animation);
 
   /// The [Animation] that controls this transition
@@ -188,6 +194,12 @@ class FlipTransition extends AnimatedWidget {
   /// The direction of the flip
   final Axis direction;
 
+  /// {@template flip_card.FlipTransition.filterQuality}
+  /// The filter quality for the internal [Transform] on the card.
+  /// Setting this to [FilterQuality.none] can prevent vertical lines but might lead to other issues.
+  /// {@endtemplate}
+  final FilterQuality? filterQuality;
+
   @override
   Widget build(BuildContext context) {
     final transform = Matrix4.identity();
@@ -204,7 +216,7 @@ class FlipTransition extends AnimatedWidget {
     return Transform(
       transform: transform,
       alignment: FractionalOffset.center,
-      filterQuality: FilterQuality.none,
+      filterQuality: filterQuality,
       child: child,
     );
   }