33 lines
965 B
Dart
33 lines
965 B
Dart
import 'package:matrix/matrix.dart';
|
|
import 'package:native_imaging/native_imaging.dart' as native;
|
|
|
|
Future<MatrixImageFileResizedResponse?> customImageResizer(
|
|
MatrixImageFileResizeArguments arguments) async {
|
|
await native.init();
|
|
var nativeImg = await native.Image.loadEncoded(arguments.bytes);
|
|
|
|
final width = nativeImg.width;
|
|
final height = nativeImg.height;
|
|
final max = arguments.maxDimension;
|
|
if (width > max || height > max) {
|
|
var w = max, h = max;
|
|
if (width > height) {
|
|
h = max * height ~/ width;
|
|
} else {
|
|
w = max * width ~/ height;
|
|
}
|
|
|
|
final scaledImg = nativeImg.resample(w, h, native.Transform.lanczos);
|
|
nativeImg.free();
|
|
nativeImg = scaledImg;
|
|
}
|
|
final jpegBytes = await nativeImg.toJpeg(75);
|
|
|
|
return MatrixImageFileResizedResponse(
|
|
bytes: jpegBytes,
|
|
width: nativeImg.width,
|
|
height: nativeImg.height,
|
|
blurhash: arguments.calcBlurhash ? nativeImg.toBlurhash(3, 3) : null,
|
|
);
|
|
}
|