Added Halo for FontRun

[charlenni]

Added Halo to IStyle and Style Added handling of Halo in FontRun Added examples to SandboxDriver

This isn't far from perfect. The sizes aren't corrected for the halo. But I assume, that this isn't very important ;-)

Further, I don't know if there are other parts in RichTextKit, that draw anything to canvas.

The result looks like this:

[m1dst]

This is exactly what I was looking for however I applied your changes but saw no halo applied.

My text is created using a RichString. I see no reference to FontRun in the RichString file so suspect further digging is required.... or I've screwed up.

An example of the style I tested..

var styleNormal = new Style
                                          {
                                            FontFamily = "OpenSans-Regular",
                                            FontSize = textSize,
                                            TextColor = SKColors.Yellow,
                                            HaloBlur = 5,
                                            HaloColor = SKColors.Red,
                                            HaloWidth = 5,
                                            LineHeight = 1.2f
                                        };

An example of the RichString

var rs = new RichString { DefaultStyle = styleNormal, MaxHeight = bitmap.Height, MaxWidth = bitmap.Width }
                        .Alignment(textAlignment)
                        .MarginLeft(textSize).MarginTop(textSize).MarginRight(textSize).MarginBottom(textSize)
                        .Add(pui.OverlayContent, fontSize: textSize);

Hope that helps.

[charlenni]

You are right. Because I don't use RichString, I didn't see this problem. I added now the code to handle halo in RichString too. Perhaps you can test it?

[m1dst]

You nailed it. Thanks!

[charlenni]

@m1dst Be careful. The halo isn't added to the measurements. If we want to do it correct, then width and height should be increased by Math.Max(haloWidth, haloBlur). But I assume, that halo is only used by small texts for special reasons.

[m1dst]

@charlenni Makes sense. In my use case I am using it to watermark images. Plenty of padding around it, all looks good.

[toptensoftware]

This isn't far from perfect

What exactly are the issues here? Is it just that the returned measured sizes don't include the halo size?

[charlenni]

Yes. The halo isn't used to calculate the sizes. I'm still not sure, if this is a good or bad idea. The problem is, that the measured sizes aren't correct. I didn't look through RichTextKit to find the places, where this happens. If you say, we need it, then I could try to find them.