[mob] Two varients of CroppedFaceImageView for testing out which is more performant

mobile/lib/ui/viewer/file_details/face_widget.dart

@@ -267,7 +267,7 @@ class _FaceWidgetState extends State<FaceWidget> {
                 SizedBox(
                   width: 60,
                   height: 60,
-                  child: CroppedFaceImageView(
+                  child: CroppedFaceImgImageView(
                     enteFile: widget.file,
                     face: widget.face,
                   ),

mobile/lib/ui/viewer/people/cropped_face_image_view.dart

@@ -1,15 +1,14 @@
 import "dart:io" show File;
+import "dart:typed_data";
 import 'dart:ui' as ui;
 
-import "package:computer/computer.dart";
 import 'package:flutter/material.dart';
 import "package:flutter/widgets.dart";
-import "package:flutter_image_compress/flutter_image_compress.dart";
-import "package:image/image.dart" as img;
 import "package:logging/logging.dart";
 import "package:photos/face/model/face.dart";
 import "package:photos/models/file/file.dart";
 import "package:photos/ui/viewer/file/thumbnail_widget.dart";
+import "package:photos/utils/face/face_util.dart";
 import "package:photos/utils/file_util.dart";
 import "package:photos/utils/image_util.dart";
 
@@ -27,23 +26,22 @@ class CroppedFaceInfo {
   });
 }
 
-class CroppedFaceImageView extends StatefulWidget {
+class CroppedFaceImgImageView extends StatefulWidget {
   final EnteFile enteFile;
   final Face face;
 
-  const CroppedFaceImageView({
+  const CroppedFaceImgImageView({
     Key? key,
     required this.enteFile,
     required this.face,
   }) : super(key: key);
 
   @override
-  CroppedFaceImageViewState createState() => CroppedFaceImageViewState();
+  CroppedFaceImgImageViewState createState() => CroppedFaceImgImageViewState();
 }
 
-class CroppedFaceImageViewState extends State<CroppedFaceImageView> {
+class CroppedFaceImgImageViewState extends State<CroppedFaceImgImageView> {
   ui.Image? _image;
-  final _computer = Computer.shared();
   final _logger = Logger("CroppedFaceImageView");
 
   @override
@@ -89,39 +87,9 @@ class CroppedFaceImageViewState extends State<CroppedFaceImageView> {
         return null;
       }
 
-      img.Image? image = await _computer
-          .compute(decodeImage, param: {"filePath": ioFile.path});
+      final image = await generateImgFaceThumbnails(ioFile.path, [faceBox]);
 
-      if (image == null) {
-        _logger.info(
-          "Failed to decode image ${widget.enteFile.title}. Compressing to jpg and decoding",
-        );
-        final compressedJPGImage =
-            await FlutterImageCompress.compressWithFile(ioFile.path);
-        image = await _computer.compute(
-          decodeJPGImage,
-          param: {"image": compressedJPGImage},
-        );
-
-        if (image == null) {
-          throw Exception("Failed to decode image");
-        }
-      }
-
-      final stopwatch = Stopwatch()..start();
-      final croppedImage = img.copyCrop(
-        image,
-        x: (image.width * faceBox.xMin).round(),
-        y: (image.height * faceBox.yMin).round(),
-        width: (image.width * faceBox.width).round(),
-        height: (image.height * faceBox.height).round(),
-        antialias: false,
-      );
-      _logger.info(
-        "Image crop took ${stopwatch.elapsedMilliseconds}ms ----------------",
-      );
-      stopwatch.stop();
-      return convertImageToFlutterUi(croppedImage);
+      return convertImageToFlutterUi(image.first);
     } catch (e, s) {
       _logger.severe("Error getting image", e, s);
       return null;
@@ -129,10 +97,72 @@ class CroppedFaceImageViewState extends State<CroppedFaceImageView> {
   }
 }
 
-Future<img.Image?> decodeImage(Map args) async {
-  return await img.decodeImageFile(args["filePath"]);
+class CroppedFaceJpgImageView extends StatefulWidget {
+  final EnteFile enteFile;
+  final Face face;
+
+  const CroppedFaceJpgImageView({
+    Key? key,
+    required this.enteFile,
+    required this.face,
+  }) : super(key: key);
+
+  @override
+  CroppedFaceJpgImageViewState createState() => CroppedFaceJpgImageViewState();
 }
 
-img.Image? decodeJPGImage(Map args) {
-  return img.decodeJpg(args["image"])!;
+class CroppedFaceJpgImageViewState extends State<CroppedFaceJpgImageView> {
+  Uint8List? _image;
+  final _logger = Logger("CroppedFaceImageView");
+
+  @override
+  void initState() {
+    super.initState();
+    _loadImage();
+  }
+
+  @override
+  void dispose() {
+    super.dispose();
+  }
+
+  Future<void> _loadImage() async {
+    final image = await getImage();
+    if (mounted) {
+      setState(() {
+        _image = image;
+      });
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return _image != null
+        ? LayoutBuilder(
+            builder: (context, constraints) {
+              return Image.memory(
+                _image!,
+              );
+            },
+          )
+        : ThumbnailWidget(widget.enteFile);
+  }
+
+  Future<Uint8List?> getImage() async {
+    try {
+      final faceBox = widget.face.detection.box;
+
+      final File? ioFile = await getFile(widget.enteFile);
+      if (ioFile == null) {
+        return null;
+      }
+
+      final image = await generateJpgFaceThumbnails(ioFile.path, [faceBox]);
+
+      return image.first;
+    } catch (e, s) {
+      _logger.severe("Error getting image", e, s);
+      return null;
+    }
+  }
 }

mobile/lib/ui/viewer/search/result/person_face_widget.dart

@@ -69,7 +69,7 @@ class PersonFaceWidget extends StatelessWidget {
             return Stack(
               fit: StackFit.expand,
               children: [
-                CroppedFaceImageView(enteFile: file, face: face),
+                CroppedFaceImgImageView(enteFile: file, face: face),
               ],
             );
           } else {