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Description:

blurhash ffi

blurhash_ffi #
A Blurhash compact Image placeholder encoder and decoder FFI implementation for flutter in C, Supports Android, iOS, Linux, macOS and Windows.
Matches the official Blurhash implementation in performance and quality.

Usage #
To use this plugin, add blurhash_ffi as a dependency in your pubspec.yaml file
One Step (both Encoding & Decoding) Usage
import 'package:blurhash_ffi/blurhash_ffi.dart';

/// Encoding and Decoding all in One Step
///
/// `ImageProvider` in -> Send your Image to be encoded.
/// `ImageProvider` out -> Get your blurry image version.

class BlurhashMyImage extends StatelessWidget {
final String imageUrl;
const BlurhashMyImage({required this.imageUrl, super.key});

@override
Widget build(BuildContext context) {
return Image(
image: BlurhashTheImage(
NetworkImage(imageUrl), // you can use any image provider of your choice.
decodingHeight: 1920, decodingWidth: 1080),
alignment: Alignment.center,
fit: BoxFit.cover
);
}
}

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Encoding

import 'package:blurhash_ffi/blurhash_ffi.dart';

/// Encoding a blurhash from an image provider
///
/// You can use any ImageProvider you want, including NetworkImage, FileImage, MemoryImage, AssetImage, etc.
final imageProvider = NetworkImage('https://picsum.photos/512');
final imageProvider2 = AssetImage('assets/image.jpg');

/// Signature
/// static Future<String> encode(
/// ImageProvider imageProvider, {
/// int componentX = 4,
/// int componentY = 3,
/// })
/// may throw `BlurhashFFIException` if encoding fails.
final String blurHash = await BlurhashFFI.encode(imageProvider);

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Decoding
import 'package:blurhash_ffi/blurhash_ffi.dart';
import 'dart:ui' as ui;
/// You have 3 ways to decode a blurhash
///
/// 1. Using the `BlurhashFfi` widget
/// 2. Using the `BlurhashFfiImage` ImageProvider
/// 3. Using the `BlurhashFfi.decode` static method

/// 1. Using the `BlurhashFfi` widget (same constructor as flutter_blurhash's Blurhash widget)
class BlurHashApp extends StatelessWidget {
const BlurHashApp({Key? key}) : super(key: key);

@override
Widget build(BuildContext context) => MaterialApp(
home: Scaffold(
appBar: AppBar(title: const Text("BlurHash")),
body: const SizedBox.expand(
child: Center(
child: AspectRatio(
aspectRatio: 1.6,
child: BlurhashFfi(hash: "L5H2EC=PM+yV0g-mq.wG9c010J}I"),
),
),
),
),
);
}

/// 2. Using the `BlurhashFfiImage` ImageProvider
final imageProvider = BlurhashFfiImage("L5H2EC=PM+yV0g-mq.wG9c010J}I");
class BlurHashApp2 extends StatelessWidget {
const BlurHashApp2({Key? key}) : super(key: key);

@override
Widget build(BuildContext context) => MaterialApp(
home: Scaffold(
appBar: AppBar(title: const Text("BlurHash")),
body: const SizedBox.expand(
child: Center(
child: AspectRatio(
aspectRatio: 1.6,
child: Image(
image: imageProvider,
fit: BoxFit.cover,
),
),
),
),
),
);
}

/// 3. Using the `BlurhashFfi.decode` static method which returns dart:ui.Image
/// Signature
/// static Future<ui.Image> decode(
/// String blurHash, {
/// int width = 32,
/// int height = 32,
/// int punch = 1,
/// })
/// may throw `BlurhashFFIException` if decoding fails.
final ui.Image image = await BlurhashFFI.decode("L5H2EC=PM+yV0g-mq.wG9c010J}I");
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Release Isolate and it's memory
do this only when you are done with encoding/decoding blurhashes
import 'package:blurhash_ffi/blurhash_ffi.dart';

BlurhashFFi.free();

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check the example for more details
contributions in the form of PR's and Issues are a welcome