C++和C#结构体转换的问题

遇到从C++传出结构体的，结构体里面套了两层结构体的问题，c++中的结构体定义为

struct DefectPoint
{int X;int Y;
};
struct DefectResult
{double Area;int Count;DefectPoint *Points;
};struct DefectResults
{DefectResult *DEFECTRESULT;
};

接口函数定义为

extern "C" _declspec(dllexport) void  DetectTexturingWhite(unsigned char *src, int height, int width,int Stride, int white_area, int texturing_area, int local_area, DefectResults* data);void  DetectTexturingWhite(unsigned char *src, int height, int width,int Stride, int white_area, int texturing_area, int local_area, DefectResults* data)
{//1、读入图像unsigned char *imgIn = new unsigned char[height*width];for (int i = 0; i <width; i++){for (int j = 0; j < height; j++){imgIn[i*width + j] = src[i*Stride + j];//stride图像矩阵行宽}}Mat img(height, width, CV_8UC1, imgIn);//2、图像预处理//Mat img_adapt(height,width,CV_8UC1,Scalar(0));//Mat img_thr(height, width, CV_8UC1, Scalar(0));Mat img_auto(height, width, CV_8UC1, Scalar(0));//int block_size = 3;//int Constant = 0;//cv::adaptiveThreshold(img, img_adapt, 255, cv::ADAPTIVE_THRESH_MEAN_C, cv::THRESH_BINARY, block_size, Constant);//int threthold_auto = threshold(img, img_auto, 0, 255, CV_THRESH_OTSU);int thr = mean(img)[0];if (thr<225){thr = thr + 30;}cv::threshold(img, img_auto, thr, 255, cv::THRESH_BINARY);//threshold(img, img_thr, 150, 255, cv::THRESH_TOZERO);Mat element = getStructuringElement(MORPH_RECT,Size(10,10));dilate(img_auto, img_auto,element);erode(img_auto, img_auto, element);//3、提取blobvector<vector<Point>> contours;vector<Vec4i> hierachy;findContours(img_auto, contours, hierachy, CV_RETR_LIST, CV_CHAIN_APPROX_NONE);sort(contours.begin(), contours.end(), ContoursSortFun);double area_begin = contourArea(contours[0], false);Mat img_display(width,height,CV_8UC1,Scalar(0));drawContours(img_display, contours, -1, Scalar::all(255));//4、判断是制绒还是小白点OUTDEFECT out_defect;int small_white_dot = 0;out_defect.texturing = (TEXTURING *)malloc(sizeof(TEXTURING)*100);                  //结构体指针初始化out_defect.whitedot = (WHITEDOT *)malloc(sizeof(WHITEDOT)*10000);                   //结构体指针初始化out_defect.texturing_num = 0;out_defect.white_num = 0;WHITEDOT *s_dot = new WHITEDOT[10000];int big_white_dot = 0;WHITEDOT *b_dot = new WHITEDOT[10000];int count_blob = contours.size();double current_area = 0;Point2f center;float radius;TEXTURING textur_current;vector<Point> small_point_center;int area_first = 0;DefectResult* p_first=NULL;for (int i = 0; i < count_blob;i++){current_area = contourArea(contours[i], false);minEnclosingCircle(contours[i], center, radius);if (current_area>texturing_area)                                         //制绒{textur_current.center = center;textur_current.area = current_area;out_defect.texturing_num++;out_defect.texturing[out_defect.texturing_num - 1] = textur_current;circle(img,center,radius,Scalar(255));int current_num = out_defect.texturing_num;int delta = 403 * (out_defect.texturing_num-1);//void *p1 = data;data[current_num - 1].DEFECTRESULT = new DefectResult();//void *p2 = (DefectResult*)p1 + (sizeof(DefectPoint)* 200 + sizeof(int)+sizeof(double))*(out_defect.texturing_num - 1) + 1;data[current_num - 1].DEFECTRESULT->Points = new DefectPoint[200];data[current_num - 1].DEFECTRESULT->Area = current_area;data[current_num - 1].DEFECTRESULT->Count = out_defect.texturing_num;int a = sizeof(data[current_num - 1].DEFECTRESULT->Points);//void *p = &(data[out_defect.texturing_num - 1].DEFECTRESULT->Count) + 1;void *p_Area = data + delta;//void *buf = reinterpret_cast<void*> (p);(data[current_num - 1].DEFECTRESULT) = (DefectResult*)(p_Area);DefectResult *p_Area1 = data[current_num - 1].DEFECTRESULT;DefectResult *p_Area2 = p_Area1;int a1 = sizeof(DefectResult);p_Area2->Area = current_area;p_Area2->Count = out_defect.texturing_num;void* p_point = data + delta +3;(p_Area2->Points) = (DefectPoint*)(p_point);DefectPoint *pp = p_Area2->Points;DefectPoint *p_temp =pp;int contours_size = contours[i].size();int contours_size1 = contours_size;if (contours_size > 200) contours_size1 = 200;for (int j = 0; j < contours_size1; j++){p_temp[j].X = contours[i][j].x;p_temp[j].Y = contours[i][j].y;}if (contours_size < 200){for (int j = contours_size; j < 200; j++){p_temp[j].X = contours[i][j].x;p_temp[j].Y = contours[i][j].y;}}if (current_num==1){area_first = current_area;p_first = p_Area2;p_first->Count = 1;}else{p_first->Area = current_area;}}else if (current_area<white_area)                                          //小白点{small_white_dot++;s_dot[small_white_dot - 1].center = center;s_dot[small_white_dot - 1].area = current_area;small_point_center.push_back(center);}else if (current_area>white_area && current_area<=texturing_area)          //大白点{ big_white_dot++;b_dot[big_white_dot - 1].center = center;b_dot[big_white_dot - 1].area = current_area;}}//5、大白点单独分析    if (big_white_dot <= 5 && big_white_dot>0){for (int i = 0; i < big_white_dot;i++){out_defect.whitedot[i] = b_dot[i];}}else{big_white_dot = 0;}//6、小白点单独分析if (small_white_dot <= 15 && small_white_dot>0){if (IsWhiteDot(small_point_center, 15, 6, local_area) == true){for (int i = 0; i < small_white_dot;i++){out_defect.whitedot[big_white_dot + i].area = b_dot[i].area;out_defect.whitedot[big_white_dot + i].center = b_dot[i].center;}}}delete[] b_dot;delete[] s_dot;
}

传入一个结构体的指针data，将data中的嵌套结构体实例化，分别利用空指针，对C#外部开辟的内存赋值

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Runtime.InteropServices;namespace BlackSilicon
{public partial class BlackSilicon : Form{static string currentPath = "";static int texturing_area;static int white_area;static int local_area;public BlackSilicon(){InitializeComponent();texturing_area = 8680;            //判断为制绒的最小面积white_area = 3472;                //判断为小白点的临界面积local_area = 17361;               //局部面积}private void button1_Click(object sender, EventArgs e){FolderBrowserDialog filedia = new FolderBrowserDialog();filedia.SelectedPath = "F:\\Project\\001\\白色同轴+8KRGB5.26\\制绒不全\\img_split\\image_cut_src";if (filedia.ShowDialog() == DialogResult.OK){string path = filedia.SelectedPath;System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(path);System.IO.FileInfo[] fi = dir.GetFiles();string[] names=new string[fi.Count()];listBox1.Items.Clear();for(int i=0;i<fi.Count();i++){names[i]=fi[i].FullName;listBox1.Items.Add(names[i]);}}}private void listBox1_SelectedIndexChanged(object sender, EventArgs e){currentPath = (string)listBox1.SelectedItem;if (pictureBox1.Image != null){pictureBox1.Image.Dispose();}Image img0 = Image.FromFile(currentPath);pictureBox1.Image = img0;}[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]public struct DefectPoint{public int X;public int Y;}[StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]public struct DefectResult{[MarshalAs(UnmanagedType.R8)]public double Area;[MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.Struct, SizeConst = 200)]public DefectPoint[] X;}[StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]public struct DefectResults{public int Count;[MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.Struct, SizeConst = 8)]public DefectResult[] STRUCT;}//[DllImport("DetectTexturingWhite.dll", CallingConvention = CallingConvention.Cdecl)]//public static extern void DetectTexturingWhite(IntPtr src, int height, int width, int Stride, //int white_area,int local_area, int texturing_area,IntPtr result); private void button3_Click(object sender, EventArgs e){if (currentPath != ""){Bitmap img0 = new Bitmap(currentPath);int height = img0.Height;int width = img0.Width;BitmapData BmData = img0.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, img0.PixelFormat);IntPtr src = BmData.Scan0;DefectResults result = new DefectResults();IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(DefectResults)));Marshal.StructureToPtr(result, ptr, true);Helper.DetectTexturingWhite(src, height, width, BmData.Stride, white_area, local_area, texturing_area, ptr);//接口调用DefectResults obj = (DefectResults)Marshal.PtrToStructure(ptr, typeof(DefectResults));img0.UnlockBits(BmData);img0.Dispose();}}[DllImport("ScourScare.dll", CallingConvention = CallingConvention.Cdecl)]public static extern void ScourScare(IntPtr src,int height,int width,int Stride);private void button4_Click(object sender, EventArgs e){if (currentPath != ""){Bitmap img0 = new Bitmap(currentPath);int height = img0.Height;int width = img0.Width;BitmapData BmData = img0.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, img0.PixelFormat);IntPtr ptr = BmData.Scan0;ScourScare(ptr, height, width, BmData.Stride);img0.UnlockBits(BmData);img0.Dispose();}}}public class Helper{[DllImport("DetectTexturingWhite.dll", CallingConvention = CallingConvention.Cdecl)]public static extern void DetectTexturingWhite(IntPtr src, int height, int width, int Stride,int white_area, int local_area, int texturing_area, IntPtr result); }
}

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