How to make a color reduction to 16 colors of a Skiasharp bitmap ?
It depends on what you mean.
If you mean a nice, quick way to reduce the number of colors. I don't think there is one. SkiaSharp is more a drawing framework than an image editing one.
If you mean a way to reduce colors per pixel, you can do this by loading a SKBitmap and replacing the color for each pixel: SKBitmap.Pixels or SKBitmap.Bytes.
Even if you can do this, I don't think SkiaSharp can save these formats. It typically reverts to a RGBA-32 color type (in PNG/JPG). I am not too familiar with existing frameworks that can manage colors/image formats. As this is probably a general .NET question, you may be better served in a less-specific topic.
Xamarin Inc., as a wholly-owned Microsoft subsidiary acting as a separate legal entity, adheres to the Microsoft Privacy Statement: Privacy & cookies