C#-使用StbSharp库读写图片

一.StbSharp

     StbSharp是基于C++/Stb图形处理库封装的C#接口,支持多种格式PNG/JPG等图片的处理.

     GitHub链接:

GitHub - StbSharp/StbTrueTypeSharp: C# port of stb_truetype.hhttps://github.com/StbSharp/StbTrueTypeSharp二.使用StbSharp创建高度图

     创建一张500*500的高度图PNG图片

        public static void GenerateHeightMapPNG()
        {
            Image image = new Image();
            image.Width = 500;
            image.Height = 500;
            image.Comp = 4;
            image.Data = new byte[image.Width * image.Height * image.Comp];

            for (int y = 0; y < image.Height; y++)
            {
                for (int x = 0; x < image.Width; x++)
                {
                    int index = (y * image.Width + x) * image.Comp;
                    if (x > 250 && y > 250)
                    {
                        image.Data[index] = 255;
                        image.Data[index + 1] = 0;
                        image.Data[index + 2] = 0;
                        image.Data[index + 3] = 255;
                    }
                    else
                    {
                        image.Data[index] = 255;
                        image.Data[index + 1] = 255;
                        image.Data[index + 2] = 255;
                        image.Data[index + 3] = 255;
                    }
                }
            }
            FileInfo fileInfo = new FileInfo("test.png");
            if (!fileInfo.Exists)
            {
                fileInfo.Create();
            }
            ImageWriter imageWriter = new ImageWriter();
            imageWriter.WritePng(image, fileInfo.OpenWrite());
        }