private byte[] RasterBitmap(uint x, uint y, int iType) { Image a = Image.FromFile("C:\123.bmp"); int Height = a.Height; int Width = a.Width; Bitmap oldBitmap = (Bitmap)a; int wwww=(int)((Width - 1) / 8+1); byte[] bmp = new byte[Height * wwww]; Color pixel; for (int y1 = 0; y1 < Height; y1++) { for (int x1 = 0; x1 < Width; x1++) { pixel = oldBitmap.GetPixel(x1, y1);//GetPixel函数运行速度有点慢 int r, g, b, Result = 0; r = pixel.R; g = pixel.G; b = pixel.B; //实例程序以加权平均值法产生黑白图像 switch (iType) { case 0://平均值法 Result = ((r + g + b) / 3); break; case 1://最大值法 Result = r > g ? r : g; Result = Result > b ? Result : b; break; case 2://加权平均值法 Result = ((int)(0.7 * r) + (int)(0.2 * g) + (int)(0.1 * b)); break; } if (Result <= (256 / 2)) bmp[y1 * wwww + x1 / 8] |= (byte)(0x80 >> (x1 % 8)); } } for (int i = 0; i < bmp.Length; i++) bmp[i] =(byte) ~bmp[i]; byte[] command = Encoding.ASCII.GetBytes("BITMAP "+x+","+y+"," + ((a.Width - 1) / 8 + 1) + "," + a.Height + ",0,");//位图BITMAP打印指令 byte[] command1 = Encoding.ASCII.GetBytes("\r\n"); byte[] data = new byte[bmp.Length + command.Length + command1.Length]; Array.Copy(command, data, command.Length); Array.Copy(bmp, 0, data, command.Length, bmp.Length); Array.Copy(command1, 0, data, command.Length + bmp.Length, command1.Length); return data; }将改方法转为c++代码

你可以将这段C#代码转换为C++代码。下面是转换后的C++代码：

#include <iostream>
#include <fstream>
#include <vector>
#include <string>

struct Color {
    int r;
    int g;
    int b;
};

std::vector<uint8_t> RasterBitmap(uint x, uint y, int iType)
{
    std::string filename = "C:\\123.bmp";
    std::ifstream file(filename, std::ios::binary);
    
    if (!file)
    {
        std::cout << "Unable to open file: " << filename << std::endl;
        return std::vector<uint8_t>();
    }
    
    // Read bitmap header
    char header[54];
    file.read(header, 54);
    
    int width = *(int*)&header[18];
    int height = *(int*)&header[22];
    
    int wwww = (width - 1) / 8 + 1;
    std::vector<uint8_t> bmp(height * wwww, 0);
    
    Color pixel;
    
    for (int y1 = 0; y1 < height; y1++)
    {
        for (int x1 = 0; x1 < width; x1++)
        {
            file.read((char*)&pixel, sizeof(Color));
            
            int r = pixel.r;
            int g = pixel.g;
            int b = pixel.b;
            
            int result = 0;
            
            switch (iType)
            {
                case 0: // 平均值法