Core 2.2中ImageSharp在图像上绘制形状

Question

I am using ImageSharp (ver 1.0.0-beta0006) in my .Net Core 2.2 project. I primarily use it to resize image (to generate thumbnail) and it's working fine.

Recently, I've got a requirement to draw rectangles on the image. Based on the documentation , this is what I've got to do:

using (var image = new Image<Rgba32>(800, 800))
        {
            image.Mutate(x => x.DrawLines(
                Rgba32.HotPink,
                10,
                new SixLabors.Primitives.PointF[] {
                    new Vector2(10, 10),
                    new Vector2(550, 50),
                    new Vector2(200, 400)
                }));

            using (var stream = new MemoryStream())
            {
                image.SaveAsBmp(stream);
            }
        }

However, I realize that in my Mutate lambda methods there is not a method named DrawLines . Can I know if I'm missing an assembly? Based on the documentation, it is using :

using SixLabors.ImageSharp.Processing;
using SixLabors.ImageSharp.PixelFormats;

both of which are found in the SixLabors.ImageSharp package.

Answer 1

Install SixLabors.ImageSharp.Drawing and you should be able to find the missing methods/extensions.

Image sharp is split into 2 main libraries, the main SixLabors.ImageSharp which deals with the core image decoding/encoding and pixel pushing, then there is SixLabors.ImageSharp.Drawing which handles various drawing sub systems, vector drawing, text rendering etc.