Writing text to image -- issue with types

[lokijota]

Hi,

I've read of two different ways to write text t images. One is this:

new Drawables()
.FontPointSize(20)
.Font("Arial", FontStyleType.Normal, FontWeight.Bold, FontStretch.Normal)
.StrokeColor(MagickColors.Red)
.FillColor(MagickColors.White)
.TextAlignment(TextAlignment.Left)
.Text(10, 10, text)
.Draw(image);

This is not working for me, because Draw expects an IMagickImage<ushort> and my image is IMagickImage.

The other one is listed in the documentation here: https://github.com/dlemstra/Magick.NET/blob/master/docs/Drawing.md. This second one uses:

image.Composite(caption, 590, 450, CompositeOperator.Over);

But the IMagickImage interface doesn't have the Composite() method.

I'm a bit lost with MagickImage, IMagickImage, IMagickImage<ushort> and the fact that they seem to have diffferent capabilities and be accepted by different methods. Is there any documentation page to help understand this? and how do I write to my IMagickImage?

Thanks!

[dlemstra]

If you need those methods you should change the use IMagickImage of to IMagickImage<ushort>. The IMagickImage<ushort> inherits from the IMagickImage interface and contain operations that need to know the Quantum type. It turns out that in this case the Composite method does not require it because none of the other arguments need to know the Quantum type so I will need to change that in a future release. But the Draw method needs this because StrokeColor needs to know the Quantum type. Now also wondering if I could change that in the future and allow passing in IMagickImage to the Draw method. The IMagickImage<ushort> interface was introduced to make it possible to add extension methods to the IMagickImage interface for methods that are unaware of the QuantumType.

Long story short. You are probably doing something along the lines of IMagickImage image = new MagickImage() and that should be changed to IMagickImage<ushort> image = new MagickImage().