img.Image resizedImage = img.copyResize(oriImage, 224, 224);

[emailsubjekt]

Hi, the copyResize method in Dart packages has been changed by the Flutter team and no longer takes in 3 arguments, but one. How do you solve this? This is the new class, if you make a new project in Flutter, you will see an error on the line in the subject, and you can inspect the same class, here it is

import 'dart:typed_data';

import '../color.dart';
import '../image.dart';
import '../image_exception.dart';
import '../util/interpolation.dart';
import 'bake_orientation.dart';

/// Returns a resized copy of the [src] image.
/// If [height] isn't specified, then it will be determined by the aspect
/// ratio of [src] and [width].
/// If [width] isn't specified, then it will be determined by the aspect ratio
/// of [src] and [height].
Image copyResize(Image src, {int width, int height,
Interpolation interpolation = Interpolation.nearest}) {
if (width == null && height == null) {
throw ImageException('Invalid size');
}

src = bakeOrientation(src);

if (height == null || height <= 0) {
height = (width * (src.height / src.width)).toInt();
}

if (width == null || width <= 0) {
width = (height * (src.width / src.height)).toInt();
}

if (width == src.width && height == src.height) {
return src.clone();
}

Image dst = Image(width, height, channels: src.channels, exif: src.exif,
iccp: src.iccProfile);

double dy = src.height / height;
double dx = src.width / width;

if (interpolation == Interpolation.average) {
Uint8List sData = src.getBytes();
int sw4 = src.width * 4;

for (int y = 0; y < height; ++y) {
  int y1 = (y * dy).toInt();
  int y2 = ((y + 1) * dy).toInt();
  if (y2 == y1) {
    y2++;
  }

  for (int x = 0; x < width; ++x) {
    int x1 = (x * dx).toInt();
    int x2 = ((x + 1) * dx).toInt();
    if (x2 == x1) {
      x2++;
    }

    int r = 0;
    int g = 0;
    int b = 0;
    int a = 0;
    int np = 0;
    for (int sy = y1; sy < y2; ++sy) {
      int si = sy * sw4 + x1 * 4;
      for (int sx = x1; sx < x2; ++sx, ++np) {
        r += sData[si++];
        g += sData[si++];
        b += sData[si++];
        a += sData[si++];
      }
    }
    dst.setPixel(x, y, getColor(r ~/ np, g ~/ np, b ~/ np, a ~/ np));
  }
}

} else if (interpolation == Interpolation.nearest) {
final scaleX = Int32List(width);
for (int x = 0; x < width; ++x) {
scaleX[x] = (x * dx).toInt();
}
for (int y = 0; y < height; ++y) {
int y2 = (y * dy).toInt();
for (int x = 0; x < width; ++x) {
dst.setPixel(x, y, src.getPixel(scaleX[x], y2));
}
}
} else {
// Copy the pixels from this image to the new image.
for (int y = 0; y < height; ++y) {
double y2 = (y * dy);
for (int x = 0; x < width; ++x) {
double x2 = (x * dx);
dst.setPixel(x, y, src.getPixelInterpolate(x2, y2, interpolation));
}
}
}

return dst;
}

For now, I have just done this

img.Image resizedImage = img.copyResize(oriImage);

and it works, but I don't know if this will change the results a lot, is there a better solution?

[emailsubjekt]

Nevermind, I saw someone already opened this 11 days ago and you helped them with this

img.Image resizedImage = img.copyResize(oriImage, width: 224, height: 224);

Thanks!

[shaqian]

Yes. It's a breaking change in flutter image library. I fixed it to the old version in latest commit.

Thanks,
Qian

[shaqian]

Archiving the thread as it's resolved.