image_size_getter

Do not completely decode the image file, just read the metadata to get the image width and height.

Just support jpeg, gif, png, webp.

Usage

import 'dart:io';

import 'package:image_size_getter/image_size_getter.dart';
import 'package:image_size_getter/file_input.dart'; // For compatibility with flutter web.

void main(List<String> arguments) async {
  final file = File('asset/IMG_20180908_080245.jpg');
  final size = ImageSizeGetter.getSize(FileInput(file));
  print('jpg = $size');

  final pngFile = File('asset/ic_launcher.png');
  final pngSize = ImageSizeGetter.getSize(FileInput(pngFile));
  print('png = $pngSize');

  final webpFile = File('asset/demo.webp');
  final webpSize = ImageSizeGetter.getSize(FileInput(webpFile));
  print('webp = $webpSize');

  final gifFile = File('asset/dialog.gif');
  final gifSize = ImageSizeGetter.getSize(FileInput(gifFile));
  print('gif = $gifSize');
}

MemoryImage

import 'package:image_size_getter/image_size_getter.dart';

void foo(Uint8List image){
  final memoryImageSize = ImageSizeGetter.getSize(MemoryInput(image));
  print('memoryImageSize = $memoryImageSize');
}

migrate

See migrate

Other question

The package is dart package, no just flutter package. So, if you want to get flutter asset image size, you must convert it to memory(Uint8List).

final buffer = await rootBundle.load('assets/logo.png'); // get the byte buffer
final memoryImageSize = ImageSizeGetter.getSize(MemoryInput.byteBuffer(buffer));
print('memoryImageSize = $memoryImageSize');

LICENSE

Apache 2.0

Libraries

file_input
image_size_getter