feat: Convert Clipboard image to png (#2092)

app/lib/util/native/file_picker.dart

@@ -6,6 +6,7 @@ import 'package:file_selector/file_selector.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:image/image.dart' as img;
 import 'package:localsend_app/config/theme.dart';
 import 'package:localsend_app/gen/strings.g.dart';
 import 'package:localsend_app/model/cross_file.dart';
@@ -270,11 +271,25 @@ Future<void> _pickClipboard(BuildContext context, Ref ref) async {
     return;
   }
 
-  final image = await Pasteboard.image;
+  var image = await Pasteboard.image;
   if (image != null) {
+    // On Windows, Pasteboard read image from clipboard as BMP which is large and inefficient. Attempt to convert to PNG
+    if (determineImageType(image) == 'bmp') {
+      try {
+        final pngImage = await (img.Command()
+              ..decodeBmp(image)
+              ..encodePng())
+            .getBytesThread();
+        if (pngImage != null) {
+          image = pngImage;
+        }
+      } catch (err) {
+        // Fail to convert to png, proceed with existing bmp
+      }
+    }
     final now = DateTime.now();
     final fileName =
-        'clipboard_${now.year}-${now.month.twoDigitString}-${now.day.twoDigitString}_${now.hour.twoDigitString}-${now.minute.twoDigitString}.${determineImageType(image)}';
+        'clipboard_${now.year}-${now.month.twoDigitString}-${now.day.twoDigitString}_${now.hour.twoDigitString}-${now.minute.twoDigitString}.${determineImageType(image!)}';
     ref.redux(selectedSendingFilesProvider).dispatch(AddBinaryAction(
           bytes: image,
           fileType: FileType.image,

app/pubspec.lock

@@ -666,7 +666,7 @@ packages:
     source: hosted
     version: "4.0.2"
   image:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: image
       sha256: f31d52537dc417fdcde36088fdf11d191026fd5e4fae742491ebd40e5a8bea7d

app/pubspec.yaml

@@ -29,6 +29,7 @@ dependencies:
     sdk: flutter
   flutter_markdown: 0.7.4+2
   gal: 2.3.0
+  image: ^4.3.0
   image_picker: 1.1.2
   in_app_purchase: 3.2.0 # [FOSS_REMOVE]
   intl: ^0.19.0 # allow newer versions, so it can compile with newer Flutter versions