refactor(mobile): Use ImmichThumbnail and local thumbnail image provider (#7279)

* Refactor to use ImmichThumbnail and local thumbnail image provider

format

* dart format

linter errors

linter

* Adds blurhash

format

* Fixes image blur

* uses hook instead of stateful widget to be more consistent

* Uses blurhash hook state

* Uses blurhash ref instead of state

* Fixes fade in duration for fade in placeholder

* Fixes an issue where thumbnails fail to load if too many thumbnail requests are made simultaenously

---------

Co-authored-by: Alex Tran <alex.tran1502@gmail.com>

mobile/lib/modules/album/ui/album_thumbnail_card.dart

@@ -3,7 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:immich_mobile/extensions/build_context_extensions.dart';
 import 'package:immich_mobile/shared/models/album.dart';
 import 'package:immich_mobile/shared/models/store.dart';
-import 'package:immich_mobile/shared/ui/immich_image.dart';
+import 'package:immich_mobile/shared/ui/immich_thumbnail.dart';
 
 class AlbumThumbnailCard extends StatelessWidget {
   final Function()? onTap;
@@ -45,8 +45,8 @@ class AlbumThumbnailCard extends StatelessWidget {
           );
         }
 
-        buildAlbumThumbnail() => ImmichImage.thumbnail(
-              album.thumbnail.value,
+        buildAlbumThumbnail() => ImmichThumbnail(
+              asset: album.thumbnail.value,
               width: cardSize,
               height: cardSize,
             );

mobile/lib/modules/album/ui/shared_album_thumbnail_image.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:immich_mobile/shared/models/asset.dart';
-import 'package:immich_mobile/shared/ui/immich_image.dart';
+import 'package:immich_mobile/shared/ui/immich_thumbnail.dart';
 
 class SharedAlbumThumbnailImage extends HookConsumerWidget {
   final Asset asset;
@@ -16,8 +16,8 @@ class SharedAlbumThumbnailImage extends HookConsumerWidget {
       },
       child: Stack(
         children: [
-          ImmichImage.thumbnail(
-            asset,
+          ImmichThumbnail(
+            asset: asset,
             width: 500,
             height: 500,
           ),

mobile/lib/modules/album/views/sharing_page.dart

@@ -12,7 +12,7 @@ import 'package:immich_mobile/modules/partner/ui/partner_list.dart';
 import 'package:immich_mobile/routing/router.dart';
 import 'package:immich_mobile/shared/providers/user.provider.dart';
 import 'package:immich_mobile/shared/ui/immich_app_bar.dart';
-import 'package:immich_mobile/shared/ui/immich_image.dart';
+import 'package:immich_mobile/shared/ui/immich_thumbnail.dart';
 
 @RoutePage()
 class SharingPage extends HookConsumerWidget {
@@ -72,8 +72,8 @@ class SharingPage extends HookConsumerWidget {
               contentPadding: const EdgeInsets.symmetric(horizontal: 12),
               leading: ClipRRect(
                 borderRadius: const BorderRadius.all(Radius.circular(8)),
-                child: ImmichImage.thumbnail(
-                  album.thumbnail.value,
+                child: ImmichThumbnail(
+                  asset: album.thumbnail.value,
                   width: 60,
                   height: 60,
                 ),

mobile/lib/modules/asset_viewer/image_providers/immich_local_image_provider.dart

@@ -11,7 +11,7 @@ import 'package:photo_manager/photo_manager.dart';
 
 /// The local image provider for an asset
 /// Only viable
-class ImmichLocalImageProvider extends ImageProvider<Asset> {
+class ImmichLocalImageProvider extends ImageProvider<ImmichLocalImageProvider> {
   final Asset asset;
 
   ImmichLocalImageProvider({
@@ -21,15 +21,18 @@ class ImmichLocalImageProvider extends ImageProvider<Asset> {
   /// Converts an [ImageProvider]'s settings plus an [ImageConfiguration] to a key
   /// that describes the precise image to load.
   @override
-  Future<Asset> obtainKey(ImageConfiguration configuration) {
-    return SynchronousFuture(asset);
+  Future<ImmichLocalImageProvider> obtainKey(ImageConfiguration configuration) {
+    return SynchronousFuture(this);
   }
 
   @override
-  ImageStreamCompleter loadImage(Asset key, ImageDecoderCallback decode) {
+  ImageStreamCompleter loadImage(
+    ImmichLocalImageProvider key,
+    ImageDecoderCallback decode,
+  ) {
     final chunkEvents = StreamController<ImageChunkEvent>();
     return MultiImageStreamCompleter(
-      codec: _codec(key, decode, chunkEvents),
+      codec: _codec(key.asset, decode, chunkEvents),
       scale: 1.0,
       chunkEvents: chunkEvents.stream,
       informationCollector: () sync* {
@@ -82,11 +85,6 @@ class ImmichLocalImageProvider extends ImageProvider<Asset> {
           yield codec;
         } catch (error) {
           throw StateError("Loading asset ${asset.fileName} failed");
-        } finally {
-          if (Platform.isIOS) {
-            // Clean up this file
-            await file.delete();
-          }
         }
       }
     }

mobile/lib/modules/asset_viewer/image_providers/immich_local_thumbnail_provider.dart

@@ -0,0 +1,86 @@
+import 'dart:async';
+import 'dart:ui' as ui;
+
+import 'package:cached_network_image/cached_network_image.dart';
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter/painting.dart';
+import 'package:immich_mobile/shared/models/asset.dart';
+import 'package:photo_manager/photo_manager.dart';
+
+/// The local image provider for an asset
+/// Only viable
+class ImmichLocalThumbnailProvider extends ImageProvider<Asset> {
+  final Asset asset;
+  final int height;
+  final int width;
+
+  ImmichLocalThumbnailProvider({
+    required this.asset,
+    this.height = 256,
+    this.width = 256,
+  }) : assert(asset.local != null, 'Only usable when asset.local is set');
+
+  /// Converts an [ImageProvider]'s settings plus an [ImageConfiguration] to a key
+  /// that describes the precise image to load.
+  @override
+  Future<Asset> obtainKey(ImageConfiguration configuration) {
+    return SynchronousFuture(asset);
+  }
+
+  @override
+  ImageStreamCompleter loadImage(Asset key, ImageDecoderCallback decode) {
+    final chunkEvents = StreamController<ImageChunkEvent>();
+    return MultiImageStreamCompleter(
+      codec: _codec(key, decode, chunkEvents),
+      scale: 1.0,
+      chunkEvents: chunkEvents.stream,
+      informationCollector: () sync* {
+        yield ErrorDescription(asset.fileName);
+      },
+    );
+  }
+
+  // Streams in each stage of the image as we ask for it
+  Stream<ui.Codec> _codec(
+    Asset key,
+    ImageDecoderCallback decode,
+    StreamController<ImageChunkEvent> chunkEvents,
+  ) async* {
+    // Load a small thumbnail
+    final thumbBytes = await asset.local?.thumbnailDataWithSize(
+      const ThumbnailSize.square(32),
+      quality: 75,
+    );
+    if (thumbBytes != null) {
+      final buffer = await ui.ImmutableBuffer.fromUint8List(thumbBytes);
+      final codec = await decode(buffer);
+      yield codec;
+    } else {
+      debugPrint("Loading thumb for ${asset.fileName} failed");
+    }
+
+    final normalThumbBytes =
+        await asset.local?.thumbnailDataWithSize(ThumbnailSize(width, height));
+    if (normalThumbBytes == null) {
+      throw StateError(
+        "Loading thumb for local photo ${asset.fileName} failed",
+      );
+    }
+    final buffer = await ui.ImmutableBuffer.fromUint8List(normalThumbBytes);
+    final codec = await decode(buffer);
+    yield codec;
+
+    chunkEvents.close();
+  }
+
+  @override
+  bool operator ==(Object other) {
+    if (other is! ImmichLocalThumbnailProvider) return false;
+    if (identical(this, other)) return true;
+    return asset == other.asset;
+  }
+
+  @override
+  int get hashCode => asset.hashCode;
+}

mobile/lib/modules/asset_viewer/image_providers/immich_remote_image_provider.dart

@@ -13,10 +13,13 @@ import 'package:immich_mobile/shared/models/store.dart';
 import 'package:immich_mobile/utils/image_url_builder.dart';
 
 /// Our Image Provider HTTP client to make the request
-final _httpClient = HttpClient()..autoUncompress = false;
+final _httpClient = HttpClient()
+  ..autoUncompress = false
+  ..maxConnectionsPerHost = 10;
 
 /// The remote image provider
-class ImmichRemoteImageProvider extends ImageProvider<String> {
+class ImmichRemoteImageProvider
+    extends ImageProvider<ImmichRemoteImageProvider> {
   /// The [Asset.remoteId] of the asset to fetch
   final String assetId;
 
@@ -32,16 +35,20 @@ class ImmichRemoteImageProvider extends ImageProvider<String> {
   /// Converts an [ImageProvider]'s settings plus an [ImageConfiguration] to a key
   /// that describes the precise image to load.
   @override
-  Future<String> obtainKey(ImageConfiguration configuration) {
-    return SynchronousFuture('$assetId,$isThumbnail');
+  Future<ImmichRemoteImageProvider> obtainKey(
+    ImageConfiguration configuration,
+  ) {
+    return SynchronousFuture(this);
   }
 
   @override
-  ImageStreamCompleter loadImage(String key, ImageDecoderCallback decode) {
-    final id = key.split(',').first;
+  ImageStreamCompleter loadImage(
+    ImmichRemoteImageProvider key,
+    ImageDecoderCallback decode,
+  ) {
     final chunkEvents = StreamController<ImageChunkEvent>();
     return MultiImageStreamCompleter(
-      codec: _codec(id, decode, chunkEvents),
+      codec: _codec(key, decode, chunkEvents),
       scale: 1.0,
       chunkEvents: chunkEvents.stream,
     );
@@ -61,14 +68,14 @@ class ImmichRemoteImageProvider extends ImageProvider<String> {
 
   // Streams in each stage of the image as we ask for it
   Stream<ui.Codec> _codec(
-    String key,
+    ImmichRemoteImageProvider key,
     ImageDecoderCallback decode,
     StreamController<ImageChunkEvent> chunkEvents,
   ) async* {
     // Load a preview to the chunk events
-    if (_loadPreview || isThumbnail) {
+    if (_loadPreview || key.isThumbnail) {
       final preview = getThumbnailUrlForRemoteId(
-        assetId,
+        key.assetId,
         type: api.ThumbnailFormat.WEBP,
       );
 
@@ -80,14 +87,14 @@ class ImmichRemoteImageProvider extends ImageProvider<String> {
     }
 
     // Guard thumnbail rendering
-    if (isThumbnail) {
+    if (key.isThumbnail) {
       await chunkEvents.close();
       return;
     }
 
     // Load the higher resolution version of the image
     final url = getThumbnailUrlForRemoteId(
-      assetId,
+      key.assetId,
       type: api.ThumbnailFormat.JPEG,
     );
     final codec = await _loadFromUri(Uri.parse(url), decode, chunkEvents);
@@ -96,7 +103,7 @@ class ImmichRemoteImageProvider extends ImageProvider<String> {
     // Load the final remote image
     if (_useOriginal) {
       // Load the original image
-      final url = getImageUrlFromId(assetId);
+      final url = getImageUrlFromId(key.assetId);
       final codec = await _loadFromUri(Uri.parse(url), decode, chunkEvents);
       yield codec;
     }
@@ -137,7 +144,7 @@ class ImmichRemoteImageProvider extends ImageProvider<String> {
   bool operator ==(Object other) {
     if (other is! ImmichRemoteImageProvider) return false;
     if (identical(this, other)) return true;
-    return assetId == other.assetId;
+    return assetId == other.assetId && isThumbnail == other.isThumbnail;
   }
 
   @override

mobile/lib/modules/asset_viewer/image_providers/immich_remote_thumbnail_provider.dart

@@ -12,14 +12,17 @@ import 'package:immich_mobile/shared/models/asset.dart';
 import 'package:immich_mobile/shared/models/store.dart';
 import 'package:immich_mobile/utils/image_url_builder.dart';
 
+/// Our HTTP client to make the request
+final _httpClient = HttpClient()
+  ..autoUncompress = false
+  ..maxConnectionsPerHost = 100;
+
 /// The remote image provider
-class ImmichRemoteThumbnailProvider extends ImageProvider<String> {
+class ImmichRemoteThumbnailProvider
+    extends ImageProvider<ImmichRemoteThumbnailProvider> {
   /// The [Asset.remoteId] of the asset to fetch
   final String assetId;
 
-  /// Our HTTP client to make the request
-  final _httpClient = HttpClient()..autoUncompress = false;
-
   ImmichRemoteThumbnailProvider({
     required this.assetId,
   });
@@ -27,12 +30,17 @@ class ImmichRemoteThumbnailProvider extends ImageProvider<String> {
   /// Converts an [ImageProvider]'s settings plus an [ImageConfiguration] to a key
   /// that describes the precise image to load.
   @override
-  Future<String> obtainKey(ImageConfiguration configuration) {
-    return SynchronousFuture(assetId);
+  Future<ImmichRemoteThumbnailProvider> obtainKey(
+    ImageConfiguration configuration,
+  ) {
+    return SynchronousFuture(this);
   }
 
   @override
-  ImageStreamCompleter loadImage(String key, ImageDecoderCallback decode) {
+  ImageStreamCompleter loadImage(
+    ImmichRemoteThumbnailProvider key,
+    ImageDecoderCallback decode,
+  ) {
     final chunkEvents = StreamController<ImageChunkEvent>();
     return MultiImageStreamCompleter(
       codec: _codec(key, decode, chunkEvents),
@@ -43,13 +51,13 @@ class ImmichRemoteThumbnailProvider extends ImageProvider<String> {
 
   // Streams in each stage of the image as we ask for it
   Stream<ui.Codec> _codec(
-    String key,
+    ImmichRemoteThumbnailProvider key,
     ImageDecoderCallback decode,
     StreamController<ImageChunkEvent> chunkEvents,
   ) async* {
     // Load a preview to the chunk events
     final preview = getThumbnailUrlForRemoteId(
-      assetId,
+      key.assetId,
       type: api.ThumbnailFormat.WEBP,
     );
 

mobile/lib/modules/asset_viewer/views/gallery_viewer.dart

@@ -1,8 +1,8 @@
 import 'dart:io';
 import 'dart:math';
+import 'dart:ui' as ui;
 import 'package:easy_localization/easy_localization.dart';
 import 'package:auto_route/auto_route.dart';
-import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_hooks/flutter_hooks.dart' hide Store;
@@ -10,6 +10,7 @@ import 'package:fluttertoast/fluttertoast.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:immich_mobile/extensions/build_context_extensions.dart';
 import 'package:immich_mobile/modules/album/providers/current_album.provider.dart';
+import 'package:immich_mobile/modules/asset_viewer/image_providers/immich_remote_image_provider.dart';
 import 'package:immich_mobile/modules/asset_viewer/providers/asset_stack.provider.dart';
 import 'package:immich_mobile/modules/asset_viewer/providers/current_asset.provider.dart';
 import 'package:immich_mobile/modules/asset_viewer/providers/show_controls.provider.dart';
@@ -26,13 +27,13 @@ import 'package:immich_mobile/modules/backup/providers/manual_upload.provider.da
 import 'package:immich_mobile/modules/home/ui/upload_dialog.dart';
 import 'package:immich_mobile/modules/partner/providers/partner.provider.dart';
 import 'package:immich_mobile/routing/router.dart';
-import 'package:immich_mobile/shared/models/store.dart';
 import 'package:immich_mobile/modules/home/ui/delete_dialog.dart';
 import 'package:immich_mobile/modules/settings/providers/app_settings.provider.dart';
 import 'package:immich_mobile/modules/settings/services/app_settings.service.dart';
 import 'package:immich_mobile/shared/providers/server_info.provider.dart';
 import 'package:immich_mobile/shared/providers/user.provider.dart';
 import 'package:immich_mobile/shared/ui/immich_image.dart';
+import 'package:immich_mobile/shared/ui/immich_thumbnail.dart';
 import 'package:immich_mobile/shared/ui/immich_toast.dart';
 import 'package:immich_mobile/shared/ui/photo_view/photo_view_gallery.dart';
 import 'package:immich_mobile/shared/ui/photo_view/src/photo_view_computed_scale.dart';
@@ -481,15 +482,9 @@ class GalleryViewerPage extends HookConsumerWidget {
                 ),
                 child: ClipRRect(
                   borderRadius: BorderRadius.circular(4),
-                  child: CachedNetworkImage(
+                  child: Image(
                     fit: BoxFit.cover,
-                    imageUrl:
-                        '${Store.get(StoreKey.serverEndpoint)}/asset/thumbnail/$assetId',
-                    httpHeaders: {
-                      "x-immich-user-token": Store.get(StoreKey.accessToken),
-                    },
-                    errorWidget: (context, url, error) =>
-                        const Icon(Icons.image_not_supported_outlined),
+                    image: ImmichRemoteImageProvider(assetId: assetId!),
                   ),
                 ),
               ),
@@ -740,9 +735,15 @@ class GalleryViewerPage extends HookConsumerWidget {
                 isZoomed.value = state != PhotoViewScaleState.initial;
                 ref.read(showControlsProvider.notifier).show = !isZoomed.value;
               },
-              loadingBuilder: (context, event, index) => ImmichImage.thumbnail(
-                asset(),
-                fit: BoxFit.contain,
+              loadingBuilder: (context, event, index) => ImageFiltered(
+                imageFilter: ui.ImageFilter.blur(
+                  sigmaX: 1,
+                  sigmaY: 1,
+                ),
+                child: ImmichThumbnail(
+                  asset: asset(),
+                  fit: BoxFit.contain,
+                ),
               ),
               pageController: controller,
               scrollPhysics: isZoomed.value

mobile/lib/modules/home/ui/asset_grid/thumbnail_image.dart

@@ -4,7 +4,7 @@ import 'package:flutter/services.dart';
 import 'package:immich_mobile/extensions/build_context_extensions.dart';
 import 'package:immich_mobile/routing/router.dart';
 import 'package:immich_mobile/shared/models/asset.dart';
-import 'package:immich_mobile/shared/ui/immich_image.dart';
+import 'package:immich_mobile/shared/ui/immich_thumbnail.dart';
 import 'package:immich_mobile/utils/storage_indicator.dart';
 import 'package:isar/isar.dart';
 
@@ -134,10 +134,10 @@ class ThumbnailImage extends StatelessWidget {
           tag: isFromDto
               ? '${asset.remoteId}-$heroOffset'
               : asset.id + heroOffset,
-          child: ImmichImage.thumbnail(
-            asset,
-            height: 300,
-            width: 300,
+          child: ImmichThumbnail(
+            asset: asset,
+            height: 250,
+            width: 250,
           ),
         ),
       );

mobile/lib/modules/memories/ui/memory_card.dart

@@ -6,6 +6,7 @@ import 'package:immich_mobile/modules/asset_viewer/views/video_viewer_page.dart'
 import 'package:immich_mobile/shared/models/asset.dart';
 import 'package:immich_mobile/shared/models/store.dart';
 import 'package:immich_mobile/shared/ui/immich_image.dart';
+import 'package:immich_mobile/shared/ui/immich_thumbnail.dart';
 
 class MemoryCard extends StatelessWidget {
   final Asset asset;
@@ -42,9 +43,8 @@ class MemoryCard extends StatelessWidget {
             child: Container(
               decoration: BoxDecoration(
                 image: DecorationImage(
-                  image: ImmichImage.imageProvider(
+                  image: ImmichThumbnail.imageProvider(
                     asset: asset,
-                    isThumbnail: true,
                   ),
                   fit: BoxFit.cover,
                 ),

mobile/lib/modules/memories/views/memory_page.dart

@@ -10,6 +10,7 @@ import 'package:immich_mobile/modules/memories/ui/memory_epilogue.dart';
 import 'package:immich_mobile/modules/memories/ui/memory_progress_indicator.dart';
 import 'package:immich_mobile/shared/models/asset.dart';
 import 'package:immich_mobile/shared/ui/immich_image.dart';
+import 'package:immich_mobile/shared/ui/immich_thumbnail.dart';
 
 @RoutePage()
 class MemoryPage extends HookConsumerWidget {
@@ -120,9 +121,8 @@ class MemoryPage extends HookConsumerWidget {
           context,
         ),
         precacheImage(
-          ImmichImage.imageProvider(
+          ImmichThumbnail.imageProvider(
             asset: asset,
-            isThumbnail: true,
           ),
           context,
         ),

mobile/lib/shared/models/asset.dart

@@ -38,7 +38,8 @@ class Asset {
         // stack handling to properly handle it
         stackParentId =
             remote.stackParentId == remote.id ? null : remote.stackParentId,
-        stackCount = remote.stackCount;
+        stackCount = remote.stackCount,
+        thumbhash = remote.thumbhash;
 
   Asset.local(AssetEntity local, List<int> hash)
       : localId = local.id,
@@ -91,6 +92,7 @@ class Asset {
     this.stackCount = 0,
     this.isReadOnly = false,
     this.isOffline = false,
+    this.thumbhash,
   });
 
   @ignore
@@ -119,6 +121,8 @@ class Asset {
   /// because Isar cannot sort lists of byte arrays
   String checksum;
 
+  String? thumbhash;
+
   @Index(unique: false, replace: false, type: IndexType.hash)
   String? remoteId;
 
@@ -279,6 +283,7 @@ class Asset {
         a.exifInfo?.latitude != exifInfo?.latitude ||
         a.exifInfo?.longitude != exifInfo?.longitude ||
         // no local stack count or different count from remote
+        a.thumbhash != thumbhash ||
         ((stackCount == null && a.stackCount != null) ||
             (stackCount != null &&
                 a.stackCount != null &&
@@ -343,6 +348,7 @@ class Asset {
           isReadOnly: a.isReadOnly,
           isOffline: a.isOffline,
           exifInfo: a.exifInfo?.copyWith(id: id) ?? exifInfo,
+          thumbhash: a.thumbhash,
         );
       } else {
         // add only missing values (and set isLocal to true)
@@ -379,6 +385,7 @@ class Asset {
     ExifInfo? exifInfo,
     String? stackParentId,
     int? stackCount,
+    String? thumbhash,
   }) =>
       Asset(
         id: id ?? this.id,
@@ -403,6 +410,7 @@ class Asset {
         exifInfo: exifInfo ?? this.exifInfo,
         stackParentId: stackParentId ?? this.stackParentId,
         stackCount: stackCount ?? this.stackCount,
+        thumbhash: thumbhash ?? this.thumbhash,
       );
 
   Future<void> put(Isar db) async {

mobile/lib/shared/ui/fade_in_placeholder_image.dart

@@ -0,0 +1,35 @@
+import 'package:flutter/material.dart';
+import 'package:immich_mobile/shared/ui/transparent_image.dart';
+
+class FadeInPlaceholderImage extends StatelessWidget {
+  final Widget placeholder;
+  final ImageProvider image;
+  final Duration duration;
+  final BoxFit fit;
+
+  const FadeInPlaceholderImage({
+    super.key,
+    required this.placeholder,
+    required this.image,
+    this.duration = const Duration(milliseconds: 100),
+    this.fit = BoxFit.cover,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return SizedBox.expand(
+      child: Stack(
+        fit: StackFit.expand,
+        children: [
+          placeholder,
+          FadeInImage(
+            fadeInDuration: duration,
+            image: image,
+            fit: fit,
+            placeholder: MemoryImage(kTransparentImage),
+          ),
+        ],
+      ),
+    );
+  }
+}

mobile/lib/shared/ui/hooks/blurhash_hook.dart

@@ -0,0 +1,17 @@
+import 'dart:convert';
+import 'dart:typed_data';
+import 'package:flutter_hooks/flutter_hooks.dart';
+import 'package:immich_mobile/shared/models/asset.dart';
+import 'package:thumbhash/thumbhash.dart' as thumbhash;
+
+ObjectRef<Uint8List?> useBlurHashRef(Asset? asset) {
+  if (asset?.thumbhash == null) {
+    return useRef(null);
+  }
+
+  final rbga = thumbhash.thumbHashToRGBA(
+    base64Decode(asset!.thumbhash!),
+  );
+
+  return useRef(thumbhash.rgbaToBmp(rbga));
+}

mobile/lib/shared/ui/immich_image.dart

@@ -1,5 +1,3 @@
-import 'dart:math';
-
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:immich_mobile/extensions/build_context_extensions.dart';
@@ -9,8 +7,6 @@ import 'package:immich_mobile/modules/home/ui/asset_grid/thumbnail_placeholder.d
 import 'package:immich_mobile/shared/models/asset.dart';
 import 'package:immich_mobile/shared/models/store.dart';
 import 'package:octo_image/octo_image.dart';
-import 'package:photo_manager/photo_manager.dart';
-import 'package:photo_manager_image_provider/photo_manager_image_provider.dart';
 
 class ImmichImage extends StatelessWidget {
   const ImmichImage(
@@ -19,8 +15,6 @@ class ImmichImage extends StatelessWidget {
     this.height,
     this.fit = BoxFit.cover,
     this.placeholder = const ThumbnailPlaceholder(),
-    this.isThumbnail = false,
-    this.thumbnailSize = 250,
     super.key,
   });
 
@@ -29,32 +23,6 @@ class ImmichImage extends StatelessWidget {
   final double? width;
   final double? height;
   final BoxFit fit;
-  final bool isThumbnail;
-  final int thumbnailSize;
-
-  /// Factory constructor to use the thumbnail variant
-  factory ImmichImage.thumbnail(
-    Asset? asset, {
-    BoxFit fit = BoxFit.cover,
-    double? width,
-    double? height,
-  }) {
-    // Use the width and height to derive thumbnail size
-    final thumbnailSize = max(width ?? 250, height ?? 250).toInt();
-
-    return ImmichImage(
-      asset,
-      isThumbnail: true,
-      fit: fit,
-      width: width,
-      height: height,
-      placeholder: ThumbnailPlaceholder(
-        height: thumbnailSize.toDouble(),
-        width: thumbnailSize.toDouble(),
-      ),
-      thumbnailSize: thumbnailSize,
-    );
-  }
 
   // Helper function to return the image provider for the asset
   // either by using the asset ID or the asset itself
@@ -66,8 +34,6 @@ class ImmichImage extends StatelessWidget {
   static ImageProvider imageProvider({
     Asset? asset,
     String? assetId,
-    bool isThumbnail = false,
-    int thumbnailSize = 250,
   }) {
     if (asset == null && assetId == null) {
       throw Exception('Must supply either asset or assetId');
@@ -76,24 +42,18 @@ class ImmichImage extends StatelessWidget {
     if (asset == null) {
       return ImmichRemoteImageProvider(
         assetId: assetId!,
-        isThumbnail: isThumbnail,
+        isThumbnail: false,
       );
     }
 
-    if (useLocal(asset) && isThumbnail) {
-      return AssetEntityImageProvider(
-        asset.local!,
-        isOriginal: false,
-        thumbnailSize: ThumbnailSize.square(thumbnailSize),
-      );
-    } else if (useLocal(asset) && !isThumbnail) {
+    if (useLocal(asset)) {
       return ImmichLocalImageProvider(
         asset: asset,
       );
     } else {
       return ImmichRemoteImageProvider(
         assetId: asset.remoteId!,
-        isThumbnail: isThumbnail,
+        isThumbnail: false,
       );
     }
   }
@@ -105,15 +65,11 @@ class ImmichImage extends StatelessWidget {
   Widget build(BuildContext context) {
     if (asset == null) {
       return Container(
-        decoration: const BoxDecoration(
-          color: Colors.grey,
-        ),
-        child: SizedBox(
-          width: width,
-          height: height,
-          child: const Center(
-            child: Icon(Icons.no_photography),
-          ),
+        color: Colors.grey,
+        width: width,
+        height: height,
+        child: const Center(
+          child: Icon(Icons.no_photography),
         ),
       );
     }
@@ -131,7 +87,6 @@ class ImmichImage extends StatelessWidget {
       },
       image: ImmichImage.imageProvider(
         asset: asset,
-        isThumbnail: isThumbnail,
       ),
       width: width,
       height: height,

mobile/lib/shared/ui/immich_thumbnail.dart

@@ -0,0 +1,89 @@
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_hooks/flutter_hooks.dart';
+import 'package:immich_mobile/modules/asset_viewer/image_providers/immich_local_thumbnail_provider.dart';
+import 'package:immich_mobile/modules/asset_viewer/image_providers/immich_remote_image_provider.dart';
+import 'package:immich_mobile/shared/models/asset.dart';
+import 'package:immich_mobile/shared/ui/hooks/blurhash_hook.dart';
+import 'package:immich_mobile/shared/ui/thumbhash_placeholder.dart';
+import 'package:octo_image/octo_image.dart';
+
+class ImmichThumbnail extends HookWidget {
+  const ImmichThumbnail({
+    this.asset,
+    this.width = 250,
+    this.height = 250,
+    this.fit = BoxFit.cover,
+    super.key,
+  });
+
+  final Asset? asset;
+  final double width;
+  final double height;
+  final BoxFit fit;
+
+  /// Helper function to return the image provider for the asset thumbnail
+  /// either by using the asset ID or the asset itself
+  /// [asset] is the Asset to request, or else use [assetId] to get a remote
+  /// image provider
+  static ImageProvider imageProvider({
+    Asset? asset,
+    String? assetId,
+    int thumbnailSize = 256,
+  }) {
+    if (asset == null && assetId == null) {
+      throw Exception('Must supply either asset or assetId');
+    }
+
+    if (asset == null) {
+      return ImmichRemoteImageProvider(
+        assetId: assetId!,
+        isThumbnail: true,
+      );
+    }
+
+    if (useLocal(asset)) {
+      return ImmichLocalThumbnailProvider(
+        asset: asset,
+        height: thumbnailSize,
+        width: thumbnailSize,
+      );
+    } else {
+      return ImmichRemoteImageProvider(
+        assetId: asset.remoteId!,
+        isThumbnail: true,
+      );
+    }
+  }
+
+  static bool useLocal(Asset asset) => !asset.isRemote || asset.isLocal;
+
+  @override
+  Widget build(BuildContext context) {
+    Uint8List? blurhash = useBlurHashRef(asset).value;
+    if (asset == null) {
+      return Container(
+        color: Colors.grey,
+        width: width,
+        height: height,
+        child: const Center(
+          child: Icon(Icons.no_photography),
+        ),
+      );
+    }
+
+    return OctoImage.fromSet(
+      placeholderFadeInDuration: Duration.zero,
+      fadeInDuration: Duration.zero,
+      fadeOutDuration: const Duration(milliseconds: 100),
+      octoSet: blurHashOrPlaceholder(blurhash),
+      image: ImmichThumbnail.imageProvider(
+        asset: asset,
+      ),
+      width: width,
+      height: height,
+      fit: fit,
+    );
+  }
+}

mobile/lib/shared/ui/thumbhash_placeholder.dart

@@ -0,0 +1,48 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:immich_mobile/modules/home/ui/asset_grid/thumbnail_placeholder.dart';
+import 'package:immich_mobile/shared/ui/fade_in_placeholder_image.dart';
+import 'package:octo_image/octo_image.dart';
+
+/// Simple set to show [OctoPlaceholder.circularProgressIndicator] as
+/// placeholder and [OctoError.icon] as error.
+OctoSet blurHashOrPlaceholder(
+  Uint8List? blurhash, {
+  BoxFit? fit,
+  Text? errorMessage,
+}) {
+  return OctoSet(
+    placeholderBuilder: blurHashPlaceholderBuilder(blurhash, fit: fit),
+    errorBuilder: blurHashErrorBuilder(blurhash, fit: fit),
+  );
+}
+
+OctoPlaceholderBuilder blurHashPlaceholderBuilder(
+  Uint8List? blurhash, {
+  BoxFit? fit,
+}) {
+  return (context) => blurhash == null
+      ? const ThumbnailPlaceholder()
+      : FadeInPlaceholderImage(
+          placeholder: const ThumbnailPlaceholder(),
+          image: MemoryImage(blurhash),
+          fit: fit ?? BoxFit.cover,
+        );
+}
+
+OctoErrorBuilder blurHashErrorBuilder(
+  Uint8List? blurhash, {
+  BoxFit? fit,
+  Text? message,
+  IconData? icon,
+  Color? iconColor,
+  double? iconSize,
+}) {
+  return OctoError.placeholderWithErrorIcon(
+    blurHashPlaceholderBuilder(blurhash, fit: fit),
+    message: message,
+    icon: icon,
+    iconColor: iconColor,
+    iconSize: iconSize,
+  );
+}

mobile/pubspec.lock

@@ -1491,6 +1491,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.6.1"
+  thumbhash:
+    dependency: "direct main"
+    description:
+      name: thumbhash
+      sha256: "5f6d31c5279ca0b5caa81ec10aae8dcaab098d82cb699ea66ada4ed09c794a37"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.0+1"
   time:
     dependency: transitive
     description:

mobile/pubspec.yaml

@@ -57,6 +57,7 @@ dependencies:
   flutter_local_notifications: ^16.3.2
   timezone: ^0.9.2
   octo_image: ^2.0.0
+  thumbhash: 0.1.0+1
 
   openapi:
     path: openapi