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11.0 2.0 14.0 1.34 MB

Compact representation of a placeholder for an image. (Flutter)

Home Page: https://pub.dev/packages/blurhash

License: MIT License

Kotlin 33.66% Ruby 5.04% Swift 26.56% Objective-C 0.08% Dart 30.51% HTML 4.15%

flutter flutter-plugin blurhash

blurhash's Introduction

blurhash

Compact representation of a placeholder for an image.

Platform Support

Android	iOS	Web
✔️	✔️	✔️

Usage

To use this plugin, add blurhash as a dependency in your pubspec.yaml file.

Example

void blurHashEncode() async {
  ByteData bytes = await rootBundle.load("image.jpg");
  Uint8List pixels = bytes.buffer.asUint8List();
  var blurHash = await BlurHash.encode(pixels, 4, 3);
}

void blurHashDecode() async {
  Uint8List? imageDataBytes;
  try {
    imageDataBytes = await BlurHash.decode(blurhash, 20, 12);
  } on PlatformException catch (e) {
    throw Exception(e.message);
  }
}

blurhash's People

Contributors

Stargazers

Watchers

Forkers

mazzonem lalitjarwal anuragvohraec lyio umurbeytaskin tcc13 briantum jonasborggren fintasys ahmedabdoelhawary nhat108 mzeealii peerwaya

blurhash's Issues

Support web, desktop

Why this package move algorithm to the native platforms? Its not reusable due to this. You can use blurhash_dart package and isolates to move work in the background.

iOS build fail : pngData() has been renamed to 'UIImagePNGRepresentation(_:)'

iOS build failed. Android is just okay.

'pngData()' has been renamed to 'UIImagePNGRepresentation(_:)'

/Users/user/flutter/.pub-cache/hosted/pub.dartlang.org/blurhash-0.1.3/ios/Classes/SwiftBlurhashPlugin.swift:21:27: 'pngData()' has been renamed to 'UIImagePNGRepresentation(_:)'

value in componentX and componentY

What should be the ideal value for componentX and componentY so that BlurHash generation takes less time
@Raincal

Any chance of an "encode" option

Love the idea of this library, an encode would be great to send up with uploaded images (well at least for me as my backend servers are pretty dumb!)

0.3.0 release?

Will there be a proper 0.3.0 release anytime soon? We have been using the pre-release version for quite some time now and I was wondering when the -nullsafey.1 will be dropped.

Android embedding issue.

plugin uses a deprecated version of the Android embedding.

Example use causes Poor performance

when using this package for the first time, I structured my widget after the example included.

  @override
  void initState() {
    super.initState();
//    blurHashDecode();
  }

  Future<void> blurHashDecode() async {
    Uint8List imageDataBytes;
    try {
      // Decodes a BlurHash string to bytes
      imageDataBytes = await BlurHash.decode("LGKB2RMzk?yY-;w|~pIoOunOM_jD", 256, 256);
    } on PlatformException catch (e) {
      print(e.message);
    }

    if (!mounted) return;

    setState(() {
      _imageDataBytes = imageDataBytes;
    });
  }

But if I use this widget in a scrolling list, it will lock up the app for a few seconds when I try to scroll. I found that this is caused by the decoding being done in the init state. I can comment out that single line, (blurHashDecode();)and it is just fine.

I think I will need to do the decoding elsewhere in my app. perhaps in the constructor of the data object, and then store the decoded bytes in a field of the data object itself.

Are there any suggestions, that may imrove performance here?

Android build not working

Version: 1.0.0
Flutter: 2.2
Platform: Android

While building my app for Android, an error pops up and the build fails.

e: /Users/albertjanp/Documents/Development/Software/flutter/.pub-cache/hosted/pub.dartlang.org/blurhash-0.2.1/android/src/main/kotlin/com/raincal/blurhash/Base83.kt: (3, 17): Redeclaration: Base83
e: /Users/albertjanp/Documents/Development/Software/flutter/.pub-cache/hosted/pub.dartlang.org/blurhash-0.2.1/android/src/main/kotlin/com/raincal/blurhash/BlurHashDecoder.kt: (10, 8): Redeclaration: BlurHashDecoder
e: /Users/albertjanp/Documents/Development/Software/flutter/.pub-cache/hosted/pub.dartlang.org/blurhash-0.2.1/android/src/main/kotlin/com/raincal/blurhash/BlurHashEncoder.kt: (10, 8): Redeclaration: BlurHashEncoder
e: /Users/albertjanp/Documents/Development/Software/flutter/.pub-cache/hosted/pub.dartlang.org/blurhash-0.2.1/android/src/main/kotlin/com/raincal/blurhash/BlurhashPlugin.kt: (12, 7): Redeclaration: BlurhashPlugin
e: /Users/albertjanp/Documents/Development/Software/flutter/.pub-cache/hosted/pub.dartlang.org/blurhash-0.2.1/android/src/main/kotlin/com/raincal/blurhash/Utils.kt: (7, 17): Redeclaration: Utils
e: /Users/albertjanp/Documents/Development/Software/flutter/.pub-cache/hosted/pub.dartlang.org/blurhash-1.0.0/android/src/main/kotlin/com/raincal/blurhash/Base83.kt: (3, 17): Redeclaration: Base83
e: /Users/albertjanp/Documents/Development/Software/flutter/.pub-cache/hosted/pub.dartlang.org/blurhash-1.0.0/android/src/main/kotlin/com/raincal/blurhash/BlurHashDecoder.kt: (10, 8): Redeclaration: BlurHashDecoder
e: /Users/albertjanp/Documents/Development/Software/flutter/.pub-cache/hosted/pub.dartlang.org/blurhash-1.0.0/android/src/main/kotlin/com/raincal/blurhash/BlurHashEncoder.kt: (10, 8): Redeclaration: BlurHashEncoder
e: /Users/albertjanp/Documents/Development/Software/flutter/.pub-cache/hosted/pub.dartlang.org/blurhash-1.0.0/android/src/main/kotlin/com/raincal/blurhash/BlurhashPlugin.kt: (16, 7): Redeclaration: BlurhashPlugin
e: /Users/albertjanp/Documents/Development/Software/flutter/.pub-cache/hosted/pub.dartlang.org/blurhash-1.0.0/android/src/main/kotlin/com/raincal/blurhash/Utils.kt: (7, 17): Redeclaration: Utils

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':blurhash:compileReleaseKotlin'.
> Compilation error. See log for more details

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 1m 59s

static Future<String> encode(Uint8List bytes) async {
  final blurHash = await BlurHash.encode(bytes, 3, 4);
  return blurHash;
}

Will there be a version supporting Dart 1.12 null-safety?

Why isn't this package pure dart

The computation shouldn't be much slower in pure dart, but it results in web, desktop and mobile support, an single codebase instead of the binding and the native implementations.