初始化

2026-09-15 15:44:13 +07:00
commit a23ba685e9
1065 changed files with 101122 additions and 0 deletions
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+library flutter_native_image;
+
+import 'dart:io';
+import 'dart:math' as math;
+
+import 'package:flutter_image_compress/flutter_image_compress.dart';
+import 'package:image/image.dart' as img;
+import 'package:path/path.dart' as p;
+
+class ImageProperties {
+  const ImageProperties({
+    required this.width,
+    required this.height,
+  });
+
+  final int width;
+  final int height;
+}
+
+class FlutterNativeImage {
+  static Future<ImageProperties> getImageProperties(String path) async {
+    final bytes = await File(path).readAsBytes();
+    final decodedImage = img.decodeImage(bytes);
+    if (decodedImage == null) {
+      throw StateError('Unable to decode image at $path');
+    }
+
+    return ImageProperties(
+      width: decodedImage.width,
+      height: decodedImage.height,
+    );
+  }
+
+  static Future<File> compressImage(
+    String path, {
+    int quality = 95,
+    int percentage = 100,
+    int? targetWidth,
+    int? targetHeight,
+  }) async {
+    final sourceFile = File(path);
+    final properties = await getImageProperties(path);
+    final extension = p.extension(path).toLowerCase();
+    final format = _formatForExtension(extension);
+    final resizedWidth = targetWidth ??
+        math.max(1, (properties.width * percentage / 100).round());
+    final resizedHeight = targetHeight ??
+        math.max(1, (properties.height * percentage / 100).round());
+    final targetPath = p.join(
+      sourceFile.parent.path,
+      '${p.basenameWithoutExtension(path)}_compressed_${DateTime.now().microsecondsSinceEpoch}${extension.isEmpty ? '.jpg' : extension}',
+    );
+
+    final compressedFile = await FlutterImageCompress.compressAndGetFile(
+      path,
+      targetPath,
+      minWidth: resizedWidth,
+      minHeight: resizedHeight,
+      quality: quality,
+      format: format,
+      keepExif: true,
+    );
+
+    if (compressedFile == null) {
+      throw StateError('Unable to compress image at $path');
+    }
+
+    return File(compressedFile.path);
+  }
+
+  static CompressFormat _formatForExtension(String extension) {
+    switch (extension) {
+      case '.png':
+        return CompressFormat.png;
+      case '.heic':
+        return CompressFormat.heic;
+      case '.webp':
+        return CompressFormat.webp;
+      default:
+        return CompressFormat.jpeg;
+    }
+  }
+}