Optimize shaders

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

example/lib/main.dart

@@ -30,13 +30,8 @@ class ExampleHome extends StatefulWidget {
 }
 
 class _ExampleHomeState extends State<ExampleHome> {
-  /// Sensor-driven controller used by the first two demo surfaces.
   late final ShinyController _sensorController;
-
-  /// Manual stream used by tilt preset buttons.
   late final StreamController<Offset> _externalTiltController;
-
-  /// Controller backed by [_externalTiltController].
   late final ShinyController _overrideController;
 
   double _prismatic = 0.8;
@@ -44,20 +39,7 @@ class _ExampleHomeState extends State<ExampleHome> {
   double _specular = 0.8;
   double _diffraction = 0.8;
   double _opacity = 1.0;
-  HolographStyle _style = HolographStyle.crackedIce;
-  SparkleShapeSpec _sparkleShape = SparkleShapeSpec.none;
-
-  static const Map<String, SparkleShapeSpec> _sparkleChoices =
-      <String, SparkleShapeSpec>{
-    'None': SparkleShapeSpec.none,
-    '8-Point Star': SparkleShapeSpec.eightPointStar,
-    '5-Point Star': SparkleShapeSpec.fivePointStar,
-    'Rectangle': SparkleShapeSpec.rectangle,
-    'Diamond': SparkleShapeSpec.diamond,
-    'Hexagon': SparkleShapeSpec.hexagon,
-    'Random Polygon': SparkleShapeSpec.randomPolygon,
-    'Confetti': SparkleShapeSpec.confetti,
-  };
+  ShinyProfile _profile = ShinyProfile.crackedIce;
 
   @override
   void initState() {
@@ -95,13 +77,12 @@ class _ExampleHomeState extends State<ExampleHome> {
                 height: 120,
                 child: Shiny(
                   controller: _sensorController,
-                  style: _style,
+                  profile: _profile,
                   prismatic: _prismatic,
                   sparkle: _sparkle,
                   specular: _specular,
                   diffraction: _diffraction,
                   opacity: _opacity,
-                  sparkleShape: _sparkleShape,
                   child: Container(
                     padding: const EdgeInsets.all(16),
                     decoration: BoxDecoration(
@@ -130,8 +111,7 @@ class _ExampleHomeState extends State<ExampleHome> {
             Center(
               child: ShinyCard(
                 controller: _sensorController,
-                style: _style,
-                sparkleShape: _sparkleShape,
+                profile: _profile,
                 background: const _DemoCardBackground(),
                 foreground: const _RareBadge(),
                 prismatic: _prismatic,
@@ -143,20 +123,10 @@ class _ExampleHomeState extends State<ExampleHome> {
             ),
             const SizedBox(height: 16),
             _StylePicker(
-              selectedStyle: _style,
-              onChanged: (HolographStyle style) {
+              selectedProfile: _profile,
+              onChanged: (ShinyProfile profile) {
                 setState(() {
-                  _style = style;
-                });
-              },
-            ),
-            const SizedBox(height: 8),
-            _SparkleShapePicker(
-              selectedShape: _sparkleShape,
-              choices: _sparkleChoices,
-              onChanged: (SparkleShapeSpec shape) {
-                setState(() {
-                  _sparkleShape = shape;
+                  _profile = profile;
                 });
               },
             ),
@@ -198,8 +168,7 @@ class _ExampleHomeState extends State<ExampleHome> {
             Center(
               child: ShinyCard(
                 controller: _overrideController,
-                style: _style,
-                sparkleShape: _sparkleShape,
+                profile: _profile,
                 prismatic: _prismatic,
                 sparkle: _sparkle,
                 specular: _specular,
@@ -258,31 +227,30 @@ class _LabeledSlider extends StatelessWidget {
 }
 
 class _StylePicker extends StatelessWidget {
-  /// Creates the style selection control.
   const _StylePicker({
-    required this.selectedStyle,
+    required this.selectedProfile,
     required this.onChanged,
   });
 
-  final HolographStyle selectedStyle;
-  final ValueChanged<HolographStyle> onChanged;
+  final ShinyProfile selectedProfile;
+  final ValueChanged<ShinyProfile> onChanged;
 
   @override
   Widget build(BuildContext context) {
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: <Widget>[
-        const Text('Style'),
+        const Text('Profile'),
         const SizedBox(height: 6),
-        SegmentedButton<HolographStyle>(
-          segments: HolographStyle.values
-              .map((HolographStyle style) => ButtonSegment<HolographStyle>(
-                    value: style,
-                    label: Text(_styleLabel(style)),
+        SegmentedButton<ShinyProfile>(
+          segments: ShinyProfile.values
+              .map((ShinyProfile profile) => ButtonSegment<ShinyProfile>(
+                    value: profile,
+                    label: Text(_profileLabel(profile)),
                   ))
               .toList(),
-          selected: <HolographStyle>{selectedStyle},
-          onSelectionChanged: (Set<HolographStyle> value) {
+          selected: <ShinyProfile>{selectedProfile},
+          onSelectionChanged: (Set<ShinyProfile> value) {
             if (value.isNotEmpty) {
               onChanged(value.first);
             }
@@ -294,61 +262,20 @@ class _StylePicker extends StatelessWidget {
     );
   }
 
-  String _styleLabel(HolographStyle style) {
-    switch (style) {
-      case HolographStyle.holographicSilver:
+  String _profileLabel(ShinyProfile profile) {
+    switch (profile) {
+      case ShinyProfile.holographicSilver:
         return 'Holographic Silver';
-      case HolographStyle.crackedIce:
+      case ShinyProfile.crackedIce:
         return 'Cracked Ice';
-      case HolographStyle.silverMosaic:
+      case ShinyProfile.silverMosaic:
         return 'Silver Mosaic';
-      case HolographStyle.superGoldVinyl:
+      case ShinyProfile.superGoldVinyl:
         return 'Super Gold Vinyl';
     }
   }
 }
 
-class _SparkleShapePicker extends StatelessWidget {
-  /// Creates sparkle shape chips from the provided shape map.
-  const _SparkleShapePicker({
-    required this.selectedShape,
-    required this.choices,
-    required this.onChanged,
-  });
-
-  final SparkleShapeSpec selectedShape;
-  final Map<String, SparkleShapeSpec> choices;
-  final ValueChanged<SparkleShapeSpec> onChanged;
-
-  @override
-  Widget build(BuildContext context) {
-    return Column(
-      crossAxisAlignment: CrossAxisAlignment.start,
-      children: <Widget>[
-        const Text('Sparkle Shape'),
-        const SizedBox(height: 6),
-        Wrap(
-          spacing: 8,
-          runSpacing: 8,
-          children:
-              choices.entries.map((MapEntry<String, SparkleShapeSpec> entry) {
-            return ChoiceChip(
-              label: Text(entry.key),
-              selected: selectedShape == entry.value,
-              onSelected: (bool selected) {
-                if (!selected) {
-                  return;
-                }
-                onChanged(entry.value);
-              },
-            );
-          }).toList(),
-        ),
-      ],
-    );
-  }
-}
-
 /// Circular D-pad control for feeding the external tilt stream.
 class _TiltPresetPicker extends StatelessWidget {
   const _TiltPresetPicker({required this.onChanged});