[BUG] Resize method rotating image during resize for one particular image

[abubkdar]

Description
I am resizing image with SKBitmap.Resize method for one particular image , its resizing and rotating to 180 degree as well.

resizing to ( height , width)
200 x 200
50 x 50
1000 x 1000

Code

public Stream GetResizedImage(Stream image, ImageMaxSize size, string imageFormat)
{
	image.Position = 0L;

	using (var inputStream = new SKManagedStream(image))
	using (var original = SKBitmap.Decode(inputStream))
	{
		if (original.ColorType == SKColorType.Gray8 || original.ColorType == SKColorType.Unknown)
		{
			original.CopyTo(original, SKImageInfo.PlatformColorType);
		}
                
               
		var (width, height) = ResizeKeepAspect(original.Width, original.Height, size.MaxWidth, size.MaxHeight);
		using (var resized = original.Resize(new SKImageInfo(width, height, original.ColorType, original.AlphaType,original.ColorSpace),SKFilterQuality.High))
		{
			if (resized == null)
			{
				_logger.LogWarning("Failed resizing image to width {0} and height {1}; color type: {2}", width, height, original.ColorType);
				return null;
			}

			using (var newImage = SKImage.FromBitmap(resized))
			{
				return newImage.Encode(GetImageFormat(imageFormat), 85).AsStream();
			}
		}
	}
}

Expected Behavior

Image should be resized only

Actual Behavior

Images resized & rotated to 180 degree as well

Basic Information

• Version with issue: 1.68.0
• Last known good version:
• IDE: Visual studio 2017
• Platform Target Frameworks: .net core
  • Android:
  • iOS:
  • Linux:
  • macOS:
  • Tizen:
  • tvOS:
  • UWP:
  • watchOS:
  • Windows Classic:

• Target Devices:

Screenshots

Reproduction Link

[abubkdar]

Further If I save as same image as .PNG , Now I can resize this PNG without issue

[handcraftedsource]

I can reproduce this with all images with portrait orientation. Images with Landscape orientation remain correctly aligned.

My code looks like this:

public static async Task<string?> GetResizedPngImageAsBase64String(this System.IO.Stream inputStream, long streamSize, int maxHeight, int maxWidth)
{
    var inputBuffer = new byte[streamSize];
    await inputStream.ReadAsync(inputBuffer);
    using var original = SKBitmap.Decode(inputBuffer);

    var scaleHeight = maxHeight / (float) original.Height;
    var scaleWidth = maxWidth / (float) original.Width;
    var scale = Math.Min(scaleHeight, scaleWidth);

    var width = (int)(original.Width * scale);
    var height = (int)(original.Height * scale);
    
    using var resized = original.Resize(new SKImageInfo(width, height), SKFilterQuality.High);
    if (resized == null)
    {
        return null;
    }

    using var image = SKImage.FromBitmap(resized);
    var buffer = image.Encode(SKEncodedImageFormat.Png, 100).ToArray();
    var result = Convert.ToBase64String(buffer);
    return result;
}

Used Package Version: 2.80.3
Framework: net6.0

[wolfgangschneider]

HI
I run into the same issue. Is this Bug still open ? Is there a workaround?