♻️ Replace the pattle_generator

2025-09-21 14:50:30 +08:00
parent c7f9da0dee
commit a2c2bfe585
8 changed files with 81 additions and 37 deletions
--- a/lib/services/color_extraction.dart
+++ b/lib/services/color_extraction.dart
@@ -0,0 +1,49 @@
+import 'package:flutter/widgets.dart';
+import 'package:image/image.dart' as img;
+import 'package:material_color_utilities/material_color_utilities.dart' as mcu;
+
+class ColorExtractionService {
+  /// Extracts dominant colors from an image provider.
+  /// Returns a list of colors suitable for UI theming.
+  static Future<List<Color>> getColorsFromImage(ImageProvider provider) async {
+    try {
+      if (provider is FileImage) {
+        final bytes = await provider.file.readAsBytes();
+        final image = img.decodeImage(bytes);
+        if (image == null) return [];
+        final Map<int, int> colorToCount = {};
+        for (int y = 0; y < image.height; y++) {
+          for (int x = 0; x < image.width; x++) {
+            final pixel = image.getPixel(x, y) as int;
+            final r = (pixel >> 24) & 0xff;
+            final g = (pixel >> 16) & 0xff;
+            final b = (pixel >> 8) & 0xff;
+            final a = pixel & 0xff;
+            if (a == 0) continue;
+            final argb = (a << 24) | (r << 16) | (g << 8) | b;
+            colorToCount[argb] = (colorToCount[argb] ?? 0) + 1;
+          }
+        }
+        final List<int> filteredResults = mcu.Score.score(
+          colorToCount,
+          desired: 1,
+          filter: true,
+        );
+        final List<int> scoredResults = mcu.Score.score(
+          colorToCount,
+          desired: 4,
+          filter: false,
+        );
+        return <dynamic>{
+          ...filteredResults,
+          ...scoredResults,
+        }.toList().map((argb) => Color(argb)).toList();
+      } else {
+        return [];
+      }
+    } catch (e) {
+      debugPrint('Error getting colors from image: $e');
+      return [];
+    }
+  }
+}