изменение профиля

2026-05-31 17:43:58 +07:00
parent 838e892bbc
commit 4afdf4b61e
7 changed files with 185 additions and 43 deletions
@@ -0,0 +1,28 @@
+import 'package:flutter/foundation.dart';
+import 'package:image/image.dart' as img;
+
+const int _avatarMaxDimension = 1024;
+const int _avatarTargetBytes = 900 * 1024;
+
+Future<Uint8List?> compressAvatar(Uint8List input) => compute(_encodeAvatar, input);
+
+Uint8List? _encodeAvatar(Uint8List input) {
+  final decoded = img.decodeImage(input);
+  if (decoded == null) return null;
+  final oriented = img.bakeOrientation(decoded);
+  final image = oriented.width > _avatarMaxDimension || oriented.height > _avatarMaxDimension
+      ? img.copyResize(
+          oriented,
+          width: oriented.width >= oriented.height ? _avatarMaxDimension : null,
+          height: oriented.height > oriented.width ? _avatarMaxDimension : null,
+          interpolation: img.Interpolation.average,
+        )
+      : oriented;
+  var quality = 88;
+  var out = img.encodeJpg(image, quality: quality);
+  while (out.lengthInBytes > _avatarTargetBytes && quality > 35) {
+    quality -= 12;
+    out = img.encodeJpg(image, quality: quality);
+  }
+  return out;
+}