WIP: Mapping sprite IDs (broken)

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

lib/sprite_gallery.dart

@@ -0,0 +1,64 @@
+import 'package:flutter/material.dart';
+import 'package:wolf_dart/classes/color_palette.dart';
+import 'package:wolf_dart/classes/matrix.dart';
+
+class SpriteGallery extends StatelessWidget {
+  final List<Matrix<int>> sprites;
+
+  const SpriteGallery({super.key, required this.sprites});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: const Text("VSWAP Sprite Gallery")),
+      backgroundColor: Colors.black,
+      body: GridView.builder(
+        gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
+          crossAxisCount: 8, // 8 sprites per row
+        ),
+        itemCount: sprites.length,
+        itemBuilder: (context, index) {
+          return Column(
+            children: [
+              Text(
+                "Idx: $index",
+                style: const TextStyle(color: Colors.white, fontSize: 10),
+              ),
+              Expanded(
+                child: CustomPaint(
+                  painter: SingleSpritePainter(sprite: sprites[index]),
+                  size: const Size(64, 64),
+                ),
+              ),
+            ],
+          );
+        },
+      ),
+    );
+  }
+}
+
+class SingleSpritePainter extends CustomPainter {
+  final Matrix<int> sprite;
+  SingleSpritePainter({required this.sprite});
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    double pixelSize = size.width / 64;
+    for (int x = 0; x < 64; x++) {
+      for (int y = 0; y < 64; y++) {
+        int colorByte = sprite[x][y];
+        if (colorByte != 255) {
+          // Skip transparency
+          canvas.drawRect(
+            Rect.fromLTWH(x * pixelSize, y * pixelSize, pixelSize, pixelSize),
+            Paint()..color = ColorPalette.vga[colorByte],
+          );
+        }
+      }
+    }
+  }
+
+  @override
+  bool shouldRepaint(CustomPainter oldDelegate) => false;
+}