Optimize shaders

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

test/shiny_widget_test.dart

@@ -8,22 +8,12 @@ const ValueKey<String> _cardTransformKey =
     ValueKey<String>('holo_shiny.card.transform');
 
 void main() {
-  test('default holograph style is crackedIce', () {
+  test('default profile is crackedIce', () {
     const Shiny shiny = Shiny(child: SizedBox.shrink());
     const ShinyCard shinyCard = ShinyCard();
 
-    expect(shiny.style, HolographStyle.crackedIce);
-    expect(shinyCard.style, HolographStyle.crackedIce);
-  });
-
-  test('default sparkle shape is none', () {
-    const Shiny shiny = Shiny(child: SizedBox.shrink());
-    const ShinyCard shinyCard = ShinyCard();
-
-    expect(shiny.sparkleShape.kind, SparkleShapeKind.none);
-    expect(shiny.sparkleShape.primary, 0.0);
-    expect(shinyCard.sparkleShape.kind, SparkleShapeKind.none);
-    expect(shinyCard.sparkleShape.primary, 0.0);
+    expect(shiny.profile, ShinyProfile.crackedIce);
+    expect(shinyCard.profile, ShinyProfile.crackedIce);
   });
 
   test('default opacity is 1.0', () {
@@ -34,27 +24,17 @@ void main() {
     expect(shinyCard.opacity, 1.0);
   });
 
-  test('custom sparkle factories produce expected specs', () {
-    final SparkleShapeSpec star =
-        SparkleShapeSpec.customStar(points: 7, innerRatio: 0.33);
-    final SparkleShapeSpec polygon = SparkleShapeSpec.customPolygon(
-        sides: 8, aspectRatio: 1.2, rotation: 0.4);
-    final SparkleShapeSpec rectangle = SparkleShapeSpec.customRectangle(
-        halfWidth: 0.20, halfHeight: 0.05, rotationJitter: 0.7);
+  test('custom profile can be set on both widgets', () {
+    const Shiny shiny = Shiny(
+      profile: ShinyProfile.superGoldVinyl,
+      child: SizedBox.shrink(),
+    );
+    const ShinyCard shinyCard = ShinyCard(
+      profile: ShinyProfile.silverMosaic,
+    );
 
-    expect(star.kind, SparkleShapeKind.star);
-    expect(star.primary, 7.0);
-    expect(star.secondary, 0.33);
-
-    expect(polygon.kind, SparkleShapeKind.polygon);
-    expect(polygon.primary, 8.0);
-    expect(polygon.secondary, 1.2);
-    expect(polygon.tertiary, 0.4);
-
-    expect(rectangle.kind, SparkleShapeKind.rectangle);
-    expect(rectangle.primary, 0.20);
-    expect(rectangle.secondary, 0.05);
-    expect(rectangle.tertiary, 0.7);
+    expect(shiny.profile, ShinyProfile.superGoldVinyl);
+    expect(shinyCard.profile, ShinyProfile.silverMosaic);
   });
 
   testWidgets('Shiny wraps any child without card transform',