Blurry text

[bforl]

This is quite hard to show in a screenshot, but I am trying to use SkiaSharp in WPF, and when comparing the rendered text, I am noticing that it is blurry and not as black (I assume due to the blurryness)

The top 4 lines are from SkiaSharp, and the bottom 4 lines are using a normal Textblock

Again, it's not really noticeable in the images, but I am noticing that it does cause eye strain, especially when you have multiple apps open and you go from one where its crisp to the app with SkiaSharp where its slightly blurry.

I have tried several things :

• IsAntialias = true
• FilterQuality = High
• SubpixelText = true
• SnapsToDevicePixels = true (on element and main window)
• UseLayoutRounding = true (on element and main window)

Any ideas if it can be improved?

Thank you

public class SkiaText : SKElement
{
    public string Text
    {
        get { return (string)GetValue(TextProperty); }
        set { SetValue(TextProperty, value); }
    }

    public static readonly DependencyProperty TextProperty =
        DependencyProperty.Register("Text", typeof(string), typeof(SkiaText), new PropertyMetadata(null));

    public SkiaText()
    {
        SnapsToDevicePixels = true;
        UseLayoutRounding = true;
    }

    protected override void OnPaintSurface(SKPaintSurfaceEventArgs e)
    {
        base.OnPaintSurface(e);

        e.Surface.Canvas.Clear(new SKColor(255, 255, 255));

        var paint = new SKPaint();
        paint.Color = new SKColor(0, 0, 0);
        paint.IsAntialias = true;
        paint.FilterQuality = SKFilterQuality.High;
        paint.TextSize = 16;
        paint.SubpixelText = true;

        e.Surface.Canvas.DrawText(Text, 0, (float)ActualHeight, paint);
    }
}

[bforl]

It seems like this is a known issue #2308

As described in the bug, the work around is to set the surface properties

SKSurface.Create(info, bitmap.BackBuffer, bitmap.BackBufferStride, new SKSurfaceProperties(SKPixelGeometry.RgbHorizontal))

As I am using WPF, I did these simply by copying the code from https://github.com/mono/SkiaSharp/blob/main/source/SkiaSharp.Views/SkiaSharp.Views.WPF/SKElement.cs and modifying it as above.

I am not sure why the BUG was closed though?