Fast image width and height about kgysoft.drawing HOT 2 CLOSED

Hello again,

My Drawing Libraries do no contain any decoders (yet). But if you use a UI of whatever technology you can rely on its already available decoders.

If you use GDI+ images (eg. in a Windows Forms application), then you can avoid loading the whole image unnecessarily by using the proper factory method of the Image class:

// GDI+: obtaining image size without loading the entire image
public Size GetImageSize(string fileName)
{
    using var stream = File.OpenRead(fileName);
    using var image = Image.FromStream(stream, useEmbeddedColorManagement: false, validateImageData: false);
    return image.Size;
}

And if you use WPF, a similar solution can be achieved by using the BitmapFrame class:

// WPF: obtaining bitmap size without loading the entire image
public Size GetBitmapSize(string fileName)
{
    using var stream = File.OpenRead(fileName);
    var bitmap = BitmapFrame.Create(stream, BitmapCreateOptions.DelayCreation, BitmapCacheOption.None);
    return new Size(bitmap.PixelWidth, bitmap.PixelHeight);
}

Actually I could add the first method to the ImageExtensions class of the GDI+ specific KGySoft.Drawing package but I never felt it quite correct because strictly speaking it is not quite an extension method for the Image type. But I can put it into the next release if you wish. Please let me know if you want me to do so.

from kgysoft.drawing.

from kgysoft.drawing.