96 lines
2.8 KiB
Dart
96 lines
2.8 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:wolf_3d_dart/wolf_3d_data_types.dart';
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class VgaGallery extends StatelessWidget {
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final List<VgaImage> images;
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const VgaGallery({super.key, required this.images});
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(title: const Text("VGA Image Gallery")),
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backgroundColor: Colors.black,
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body: GridView.builder(
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gridDelegate: const SliverGridDelegateWithMaxCrossAxisExtent(
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maxCrossAxisExtent: 150,
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crossAxisSpacing: 10,
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mainAxisSpacing: 10,
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),
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itemCount: images.length,
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itemBuilder: (context, index) {
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return Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Text(
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"Index: $index\n${images[index].width} x ${images[index].height}",
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style: const TextStyle(color: Colors.white, fontSize: 12),
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textAlign: TextAlign.center,
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),
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const SizedBox(height: 8),
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Expanded(
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child: Center(
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child: CustomPaint(
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painter: VgaPainter(image: images[index]),
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// Scale it up so tiny fonts are readable
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size: Size(
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images[index].width * 2.0,
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images[index].height * 2.0,
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),
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),
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),
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),
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],
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);
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},
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),
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);
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}
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}
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class VgaPainter extends CustomPainter {
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final VgaImage image;
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VgaPainter({required this.image});
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@override
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void paint(Canvas canvas, Size size) {
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int planeWidth = image.width ~/ 4;
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int planeSize = planeWidth * image.height;
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double pixelW = size.width / image.width;
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double pixelH = size.height / image.height;
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final Paint paint = Paint()..isAntiAlias = false;
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for (int y = 0; y < image.height; y++) {
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for (int x = 0; x < image.width; x++) {
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int plane = x % 4;
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int sx = x ~/ 4;
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int colorByte =
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image.pixels[(plane * planeSize) + (y * planeWidth) + sx];
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if (colorByte != 255) {
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int abgr = ColorPalette.vga32Bit[colorByte];
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// Extract the bytes
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int r = abgr & 0xFF;
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int g = (abgr >> 8) & 0xFF;
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int b = (abgr >> 16) & 0xFF;
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int a = (abgr >> 24) & 0xFF;
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// Repack them as ARGB for Flutter's Color object
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int argb = (a << 24) | (r << 16) | (g << 8) | b;
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paint.color = Color(argb);
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canvas.drawRect(
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Rect.fromLTWH(x * pixelW, y * pixelH, pixelW + 0.5, pixelH + 0.5),
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paint,
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);
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}
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}
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}
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}
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@override
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bool shouldRepaint(covariant CustomPainter oldDelegate) => false;
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}
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