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Cache remote images

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This commit is contained in:
Vishnu Mohandas 2020-06-15 10:20:26 +05:30
parent d84456bd5c
commit d5580915e3
2 changed files with 38 additions and 7 deletions
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15
lib/core/cache/image_cache.dart vendored
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@ -1,9 +1,10 @@
import 'dart:io';
import 'dart:typed_data';
import 'package:photos/core/cache/lru_map.dart';
import 'package:photos/models/photo.dart';
class ImageLruCache {
class FileLruCache {
static LRUMap<int, File> _map = LRUMap(25);
static File get(Photo photo) {
@ -14,3 +15,15 @@ class ImageLruCache {
_map.put(photo.hashCode, imageData);
}
}
class BytesLruCache {
static LRUMap<int, Uint8List> _map = LRUMap(25);
static Uint8List get(Photo photo) {
return _map.get(photo.hashCode);
}
static void put(Photo photo, Uint8List imageData) {
_map.put(photo.hashCode, imageData);
}
}

30
lib/ui/zoomable_image.dart
View file

@ -110,13 +110,31 @@ class _ZoomableImageState extends State<ZoomableImage>
void _loadNetworkImage() {
if (!_loadedSmallThumbnail && widget.photo.thumbnailPath.isNotEmpty) {
_imageProvider = Image.network(widget.photo.getThumbnailUrl()).image;
_imageProvider = Image.network(
widget.photo.getThumbnailUrl(),
gaplessPlayback: true,
).image;
_loadedSmallThumbnail = true;
}
if (!_loadedFinalImage) {
widget.photo.getBytes().then((data) {
_onFinalImageLoaded(Image.memory(data).image, context);
});
if (BytesLruCache.get(widget.photo) != null) {
_onFinalImageLoaded(
Image.memory(
BytesLruCache.get(widget.photo),
gaplessPlayback: true,
).image,
context);
} else {
widget.photo.getBytes().then((data) {
_onFinalImageLoaded(
Image.memory(
data,
gaplessPlayback: true,
).image,
context);
BytesLruCache.put(widget.photo, data);
});
}
}
}
@ -154,7 +172,7 @@ class _ZoomableImageState extends State<ZoomableImage>
if (!_loadingFinalImage && !_loadedFinalImage) {
_loadingFinalImage = true;
final cachedFile = ImageLruCache.get(widget.photo);
final cachedFile = FileLruCache.get(widget.photo);
if (cachedFile != null) {
final imageProvider = Image.file(cachedFile).image;
_onFinalImageLoaded(imageProvider, context);
@ -164,7 +182,7 @@ class _ZoomableImageState extends State<ZoomableImage>
if (mounted) {
final imageProvider = Image.file(file).image;
_onFinalImageLoaded(imageProvider, context);
ImageLruCache.put(widget.photo, file);
FileLruCache.put(widget.photo, file);
}
});
});