MesPrintService/Print.Application/Print/GoDEXPrintImage.cs

using SixLabors.ImageSharp;
using SixLabors.ImageSharp.PixelFormats;
using SixLabors.ImageSharp.Processing;
using System.Collections.Generic;
using System.Text;

namespace JingGong.Abp.Print.GoDEX
{
    /// <summary>
    /// 打印图片
    /// </summary>
    public abstract class GoDEXPrintImage : GoDEXPrintData
    {
        /// <summary>
        /// X起始位置，单位mm
        /// </summary>
        public int PosX { get; set; }

        /// <summary>
        /// Y起始位置，单位mm
        /// </summary>
        public int PosY { get; set; }

        /// <summary>
        /// 图片宽，单位mm
        /// </summary>
        public int Width { get; set; }

        /// <summary>
        /// 图片高，单位mm
        /// </summary>
        public int Height { get; set; }

        /// <summary>
        /// 打印图像
        /// </summary>
        /// <returns></returns>
        public override bool Print()
        {
            var imageData = ProcessImageData();

            //Q10,10,102,484(圖案命令x,y,width,heigh)
            //x = 自左上角量起之水平位置(單位：dots).
            //y = 自左上角量起之垂直位置(單位：dots).
            //width = 圖檔寬度(單位：byte)
            //height = 圖檔高度(單位：dots)
            EzioInterop.sendcommand($"Q{PosX * Dots},{PosY * Dots},{imageData.Width},{imageData.Height}");
            //EzioInterop.sendcommand($"Q40,10,3,8");

            //发送图片数据
            //EzioInterop.sendcommand(imageData);
            EzioInterop.sendbuf(imageData.Data, imageData.Data.Length);
            //EzioInterop.sendbuf(new byte[] { 0b01000001, 0b01000001, 0b01000001,
            //0b01000001,0b01000001,0b01000001,
            //0b01000001,0b01000001,0b01000001,
            //0b01000001,0b01000001,0b01000001,
            //0b01000001,0b01000001,0b01000001,
            //0b01000001,0b01000001,0b01000001,
            //0b01000001,0b01000001,0b01000001,
            //0b01000001,0b01000001,0b01000001,}, 24);

            EzioInterop.sendcommand("\n");

            return true;

        }

        /// <summary>
        /// 处理图片数据
        /// </summary>
        /// <param name="base64"></param>
        /// <returns></returns>
        protected virtual (int Width, int Height, byte[] Data) ProcessImageData()
        {
            var imageBytes = GetImageData();

            // 加载图像
            using (var image = Image.Load(imageBytes))
            {
                // 获取原始图像尺寸
                int originalWidth = image.Width;
                int originalHeight = image.Height;

                image.Mutate(ctx =>
                {
                    // 转换为灰度图像
                    // 进行二值化，128是阈值，低于该值为黑色，高于为白色
                    //image.Mutate(x => x.Grayscale().BinaryThreshold(128f / 255f));
                    ctx.Grayscale();

                    //调整图像大小
                    if (Width != 0 || Height != 0)
                        ctx.Resize(originalWidth * 2, originalHeight * 2, KnownResamplers.Bicubic);

                    ////适当锐化
                    //ctx.GaussianSharpen(3f);

                    ////调整对比度
                    //ctx.Contrast(1.2f); 

                });

                return ConvertImageToBytes(image);
            }
        }

        /// <summary>
        /// 获取图片数据
        /// </summary>
        /// <returns></returns>
        protected abstract byte[] GetImageData();

        /// <summary>
        /// 获取图像数据
        /// </summary>
        /// <param name="imageBytes"></param>
        /// <returns></returns>
        protected (int Width, int Height, byte[] Data) ConvertImageToBytes(Image image)
        {
            StringBuilder sb = new StringBuilder();

            var clonedImage = image.CloneAs<Rgba32>();


            // 创建一个列表来存储字节数据
            List<byte> byteList = new List<byte>();

            // 遍历每一行
            for (int y = 0; y < image.Height; y++)
            {
                byte currentByte = 0;
                int bitCount = 0;

                for (int x = 0; x < image.Width; x++)
                {
                    // 获取当前像素的颜色
                    var pixel = clonedImage[x, y];

                    // 黑色为1，白色为0（颠倒值）
                    //将灰度转为黑白，选择适当灰度值转为黑色
                    byte pixelValue = pixel.R <= 180 ? (byte)1 : (byte)0;

                    // 将像素值存入当前字节
                    currentByte |= (byte)(pixelValue << (7 - bitCount));
                    bitCount++;

                    // 如果一个字节已满，保存该字节并清空
                    if (bitCount == 8)
                    {
                        sb.Append((char)currentByte);

                        byteList.Add(currentByte);
                        currentByte = 0;
                        bitCount = 0;

                    }
                }

                // 如果行末不足8个像素，则补充零
                if (bitCount > 0)
                {
                    sb.Append((char)currentByte);
                    byteList.Add(currentByte);
                }
            }

            return (image.Width % 8 == 0 ? image.Width / 8 : image.Width / 8 + 1, image.Height, byteList.ToArray());
        }
    }
}