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Unified asset painter and added to package. Fixes and simplifes sprite rendering.

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Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>
This commit is contained in:
Hans Kokx
2026-03-17 13:00:04 +01:00
parent 2ff7e04ba4
commit 1575042870
4 changed files with 215 additions and 109 deletions
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31
apps/wolf_3d_gui/lib/screens/sprite_gallery.dart
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@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
import 'package:wolf_3d_dart/wolf_3d_data_types.dart';
import 'package:wolf_3d_dart/wolf_3d_entities.dart';
import 'package:wolf_3d_flutter/wolf_3d.dart';
import 'package:wolf_3d_renderer/wolf_3d_asset_painter.dart';
class SpriteGallery extends StatelessWidget {
final List<Sprite> sprites;
@@ -53,10 +54,7 @@ class SpriteGallery extends StatelessWidget {
textAlign: TextAlign.center,
),
Expanded(
child: CustomPaint(
painter: SingleSpritePainter(sprite: sprites[index]),
size: const Size(64, 64),
),
child: WolfAssetPainter.sprite(sprites[index]),
),
],
);
@@ -65,28 +63,3 @@ class SpriteGallery extends StatelessWidget {
);
}
}
class SingleSpritePainter extends CustomPainter {
final Sprite 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.pixels[x * 64 + y];
if (colorByte != 255) {
// Skip transparency
canvas.drawRect(
Rect.fromLTWH(x * pixelSize, y * pixelSize, pixelSize, pixelSize),
Paint()..color = Color(ColorPalette.vga32Bit[colorByte]),
);
}
}
}
}
@override
bool shouldRepaint(CustomPainter oldDelegate) => false;
}

56
apps/wolf_3d_gui/lib/screens/vga_gallery.dart
View File

@@ -1,5 +1,6 @@
import 'package:flutter/material.dart';
import 'package:wolf_3d_dart/wolf_3d_data_types.dart';
import 'package:wolf_3d_renderer/wolf_3d_asset_painter.dart';
class VgaGallery extends StatelessWidget {
final List<VgaImage> images;
@@ -30,14 +31,7 @@ class VgaGallery extends StatelessWidget {
const SizedBox(height: 8),
Expanded(
child: Center(
child: CustomPaint(
painter: VgaPainter(image: images[index]),
// Scale it up so tiny fonts are readable
size: Size(
images[index].width * 2.0,
images[index].height * 2.0,
),
),
child: WolfAssetPainter.vga(images[index]),
),
),
],
@@ -47,49 +41,3 @@ class VgaGallery extends StatelessWidget {
);
}
}
class VgaPainter extends CustomPainter {
final VgaImage image;
VgaPainter({required this.image});
@override
void paint(Canvas canvas, Size size) {
int planeWidth = image.width ~/ 4;
int planeSize = planeWidth * image.height;
double pixelW = size.width / image.width;
double pixelH = size.height / image.height;
final Paint paint = Paint()..isAntiAlias = false;
for (int y = 0; y < image.height; y++) {
for (int x = 0; x < image.width; x++) {
int plane = x % 4;
int sx = x ~/ 4;
int colorByte =
image.pixels[(plane * planeSize) + (y * planeWidth) + sx];
if (colorByte != 255) {
int abgr = ColorPalette.vga32Bit[colorByte];
// Extract the bytes
int r = abgr & 0xFF;
int g = (abgr >> 8) & 0xFF;
int b = (abgr >> 16) & 0xFF;
int a = (abgr >> 24) & 0xFF;
// Repack them as ARGB for Flutter's Color object
int argb = (a << 24) | (r << 16) | (g << 8) | b;
paint.color = Color(argb);
canvas.drawRect(
Rect.fromLTWH(x * pixelW, y * pixelH, pixelW + 0.5, pixelH + 0.5),
paint,
);
}
}
}
}
@override
bool shouldRepaint(covariant CustomPainter oldDelegate) => false;
}