47、使用c++的tinyxml对svg图形进行算法处理

基本思想：使用c++的tinyxml实现svg图形进行算法处理，需要预先编译boost和opencv

Mingw32编译boost，并使用Clion测试_sxj731533730-CSDN博客

clion目录

cmakelists.txt

cmake_minimum_required(VERSION 3.16)
project(untitled)set(CMAKE_CXX_STANDARD 14)
include_directories(${CMAKE_SOURCE_DIR})
include_directories(${CMAKE_SOURCE_DIR}/include)
set(OpenCV_DIR "D:\\Opencv440\\buildMinGW")#改为mingw-bulid的位置
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/")
find_package(OpenCV REQUIRED)
include_directories(${OpenCV_INCLUDE_DIRS})
add_library(libboost STATIC IMPORTED)
set_target_properties(libboost PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/lib/boost.a)add_executable(untitled main.cpp tinystr.cpp tinyxml.cpp tinyxmlparser.cpp tinyxmlerror.cpp )target_link_libraries(untitled ${OpenCV_LIBS} libboost)

代码


#include <iostream>
#include<string>
#include<vector>
#include <map>#include "opencv2/core.hpp"
#include "opencv2/imgproc.hpp"
#include "opencv2/highgui.hpp"
#include "tinyxml.h"
#include <fstream>
#include <iostream>#include <boost/geometry.hpp> // read_wkt
#include <boost/geometry/geometries/point_xy.hpp>
#include <boost/geometry/geometries/polygon.hpp>
#include <boost/geometry/geometries/multi_polygon.hpp>
#include <boost/geometry/algorithms/union.hpp>using namespace cv;
using namespace std;
using PointType = boost::geometry::model::d2::point_xy<int>;
using PolygonType = boost::geometry::model::polygon<PointType>;
using MultiPolygonType = boost::geometry::model::multi_polygon<PolygonType>;template <typename TPolygon>void WritePolygonsToSVG(const std::vector<TPolygon>& polygons, const std::string& filename)
{std::ofstream svg(filename);boost::geometry::svg_mapper<PointType> mapper(svg, 400, 400);for(unsigned int i = 0; i < polygons.size(); ++i) {mapper.add(polygons[i]);mapper.map(polygons[i], "fill:rgb(255,128,0);stroke:rgb(0,0,100);stroke-width:1");}}void createCircleSVG(TiXmlDocument &xml_doc) {// 添加XML声明xml_doc.LinkEndChild(new TiXmlDeclaration("1.0", "GBK", ""));// 添加根元素TiXmlElement *xml_html = new TiXmlElement("html");xml_doc.LinkEndChild(xml_html);// 嵌套子元素TiXmlElement *xml_body = new TiXmlElement("body");xml_html->LinkEndChild(xml_body);TiXmlElement *xml_h1 = new TiXmlElement("h1");xml_h1->LinkEndChild(new TiXmlText("My first SVG"));xml_body->LinkEndChild(xml_h1);TiXmlElement *xml_circle = new TiXmlElement("circle");xml_circle->SetAttribute("cx", "100");xml_circle->SetAttribute("cy", "50");xml_circle->SetAttribute("r", "40");xml_circle->SetAttribute("stroke", "black");xml_circle->SetAttribute("stroke-width", "2");xml_circle->SetAttribute("fill", "none");TiXmlElement *xml_svg = new TiXmlElement("svg");xml_svg->SetAttribute("xmlns", "http://www.w3.org/2000/svg");xml_svg->SetAttribute("version", "1.1");xml_svg->LinkEndChild(xml_circle);xml_body->LinkEndChild(xml_svg);}void createEllipseSVG(TiXmlDocument &xml_doc) {// 添加XML声明xml_doc.LinkEndChild(new TiXmlDeclaration("1.0", "GBK", ""));// 添加根元素TiXmlElement *xml_html = new TiXmlElement("html");xml_doc.LinkEndChild(xml_html);// 嵌套子元素TiXmlElement *xml_body = new TiXmlElement("body");xml_html->LinkEndChild(xml_body);TiXmlElement *xml_h1 = new TiXmlElement("h1");xml_h1->LinkEndChild(new TiXmlText("My first SVG"));xml_body->LinkEndChild(xml_h1);TiXmlElement *xml_ellipse = new TiXmlElement("ellipse");xml_ellipse->SetAttribute("cx", "300");xml_ellipse->SetAttribute("cy", "80");xml_ellipse->SetAttribute("rx", "100");xml_ellipse->SetAttribute("ry", "50");xml_ellipse->SetAttribute("stroke", "black");xml_ellipse->SetAttribute("stroke-width", "2");xml_ellipse->SetAttribute("fill", "red");TiXmlElement *xml_svg = new TiXmlElement("svg");xml_svg->SetAttribute("xmlns", "http://www.w3.org/2000/svg");xml_svg->SetAttribute("version", "1.1");xml_svg->LinkEndChild(xml_ellipse);xml_body->LinkEndChild(xml_svg);}void createRectSVG(TiXmlDocument &xml_doc) {// 添加XML声明xml_doc.LinkEndChild(new TiXmlDeclaration("1.0", "GBK", ""));// 添加根元素TiXmlElement *xml_html = new TiXmlElement("html");xml_doc.LinkEndChild(xml_html);// 嵌套子元素TiXmlElement *xml_body = new TiXmlElement("body");xml_html->LinkEndChild(xml_body);TiXmlElement *xml_h1 = new TiXmlElement("h1");xml_h1->LinkEndChild(new TiXmlText("My first SVG"));xml_body->LinkEndChild(xml_h1);TiXmlElement *xml_rect = new TiXmlElement("rect");xml_rect->SetAttribute("x", "300");xml_rect->SetAttribute("y", "100");xml_rect->SetAttribute("width", "300");xml_rect->SetAttribute("height", "100");xml_rect->SetAttribute("stroke", "black");xml_rect->SetAttribute("stroke-width", "2");xml_rect->SetAttribute("fill", "none");TiXmlElement *xml_svg = new TiXmlElement("svg");xml_svg->SetAttribute("xmlns", "http://www.w3.org/2000/svg");xml_svg->SetAttribute("version", "1.1");xml_svg->LinkEndChild(xml_rect);xml_body->LinkEndChild(xml_svg);}void createPolygonSVG(TiXmlDocument &xml_doc) {// 添加XML声明xml_doc.LinkEndChild(new TiXmlDeclaration("1.0", "GBK", ""));// 添加根元素TiXmlElement *xml_html = new TiXmlElement("html");xml_doc.LinkEndChild(xml_html);// 嵌套子元素TiXmlElement *xml_body = new TiXmlElement("body");xml_html->LinkEndChild(xml_body);TiXmlElement *xml_h1 = new TiXmlElement("h1");xml_h1->LinkEndChild(new TiXmlText("My first SVG"));xml_body->LinkEndChild(xml_h1);TiXmlElement *xml_polygon = new TiXmlElement("polygon");xml_polygon->SetAttribute("points", "200,10 250,190 160,210");xml_polygon->SetAttribute("stroke", "black");xml_polygon->SetAttribute("stroke-width", "2");xml_polygon->SetAttribute("fill", "none");TiXmlElement *xml_svg = new TiXmlElement("svg");xml_svg->SetAttribute("xmlns", "http://www.w3.org/2000/svg");xml_svg->SetAttribute("version", "1.1");xml_svg->LinkEndChild(xml_polygon);xml_body->LinkEndChild(xml_svg);}void createLineSVG(TiXmlDocument &xml_doc) {// 添加XML声明xml_doc.LinkEndChild(new TiXmlDeclaration("1.0", "GBK", ""));// 添加根元素TiXmlElement *xml_html = new TiXmlElement("html");xml_doc.LinkEndChild(xml_html);// 嵌套子元素TiXmlElement *xml_body = new TiXmlElement("body");xml_html->LinkEndChild(xml_body);TiXmlElement *xml_h1 = new TiXmlElement("h1");xml_h1->LinkEndChild(new TiXmlText("My first SVG"));xml_body->LinkEndChild(xml_h1);TiXmlElement *xml_line = new TiXmlElement("line");xml_line->SetAttribute("x1", "100");xml_line->SetAttribute("y1", "100");xml_line->SetAttribute("x2", "400");xml_line->SetAttribute("y2", "400");xml_line->SetAttribute("stroke", "black");xml_line->SetAttribute("stroke-width", "2");xml_line->SetAttribute("fill", "none");TiXmlElement *xml_svg = new TiXmlElement("svg");xml_svg->SetAttribute("xmlns", "http://www.w3.org/2000/svg");xml_svg->SetAttribute("version", "1.1");xml_svg->LinkEndChild(xml_line);xml_body->LinkEndChild(xml_svg);}void createPolylineSVG(TiXmlDocument &xml_doc) {// 添加XML声明xml_doc.LinkEndChild(new TiXmlDeclaration("1.0", "GBK", ""));// 添加根元素TiXmlElement *xml_html = new TiXmlElement("html");xml_doc.LinkEndChild(xml_html);// 嵌套子元素TiXmlElement *xml_body = new TiXmlElement("body");xml_html->LinkEndChild(xml_body);TiXmlElement *xml_h1 = new TiXmlElement("h1");xml_h1->LinkEndChild(new TiXmlText("My first SVG"));xml_body->LinkEndChild(xml_h1);TiXmlElement *xml_polyline = new TiXmlElement("polyline");xml_polyline->SetAttribute("points", "20,20 40,25 60,40 80,120 120,140 200,180");xml_polyline->SetAttribute("stroke", "black");xml_polyline->SetAttribute("stroke-width", "2");xml_polyline->SetAttribute("fill", "none");TiXmlElement *xml_svg = new TiXmlElement("svg");xml_svg->SetAttribute("xmlns", "http://www.w3.org/2000/svg");xml_svg->SetAttribute("version", "1.1");xml_svg->LinkEndChild(xml_polyline);xml_body->LinkEndChild(xml_svg);}void createPathSVG(TiXmlDocument &xml_doc) {// 添加XML声明xml_doc.LinkEndChild(new TiXmlDeclaration("1.0", "GBK", ""));// 添加根元素TiXmlElement *xml_html = new TiXmlElement("html");xml_doc.LinkEndChild(xml_html);// 嵌套子元素TiXmlElement *xml_body = new TiXmlElement("body");xml_html->LinkEndChild(xml_body);TiXmlElement *xml_h1 = new TiXmlElement("h1");xml_h1->LinkEndChild(new TiXmlText("My first SVG"));xml_body->LinkEndChild(xml_h1);TiXmlElement *xml_path = new TiXmlElement("path");xml_path->SetAttribute("d", "M150 0 L75 200 L225 200 Z");xml_path->SetAttribute("stroke", "black");xml_path->SetAttribute("stroke-width", "2");xml_path->SetAttribute("fill", "none");TiXmlElement *xml_svg = new TiXmlElement("svg");xml_svg->SetAttribute("xmlns", "http://www.w3.org/2000/svg");xml_svg->SetAttribute("version", "1.1");xml_svg->LinkEndChild(xml_path);xml_body->LinkEndChild(xml_svg);}void parseCircleSVG(TiXmlDocument &xml_doc) {TiXmlHandle docHandle(&xml_doc);TiXmlElement *child = docHandle.FirstChild("html").FirstChild("body").FirstChild("svg").ToElement();for (child; child; child = child->NextSiblingElement()) {string xmlnsStr = child->Attribute("xmlns");string versionStr = child->Attribute("version");std::cout << "xmlns :" << xmlnsStr<< " version" << versionStr << std::endl;TiXmlElement *circleItem = child->FirstChild()->ToElement();string cxStr = circleItem->Attribute("cx");string cyStr = circleItem->Attribute("cy");string rStr = circleItem->Attribute("r");string strokeStr = circleItem->Attribute("stroke");string stroke_widthStr = circleItem->Attribute("stroke-width");string fillStr = circleItem->Attribute("fill");std::cout << "cx :" << cxStr<< " cy :" << cyStr<< " r :" << rStr<< " stroke :" << strokeStr<< " stroke-width :" << stroke_widthStr<< " fill :" << fillStr << std::endl;}}void parseRectSVG(TiXmlDocument &xml_doc) {TiXmlHandle docHandle(&xml_doc);TiXmlElement *child = docHandle.FirstChild("html").FirstChild("body").FirstChild("svg").ToElement();for (child; child; child = child->NextSiblingElement()) {string xmlnsStr = child->Attribute("xmlns");string versionStr = child->Attribute("version");std::cout << "xmlns :" << xmlnsStr<< " version" << versionStr << std::endl;TiXmlElement *circleItem = child->FirstChild()->ToElement();string xStr = circleItem->Attribute("x");string yStr = circleItem->Attribute("y");string widthStr = circleItem->Attribute("width");string heightStr = circleItem->Attribute("height");string strokeStr = circleItem->Attribute("stroke");string stroke_widthStr = circleItem->Attribute("stroke-width");string fillStr = circleItem->Attribute("fill");std::cout << "x :" << xStr<< " y :" << yStr<< " width :" << widthStr<< " height :" << heightStr<< " stroke :" << strokeStr<< " stroke-width :" << stroke_widthStr<< " fill :" << fillStr << std::endl;}}void parseEllipseSVG(TiXmlDocument &xml_doc) {TiXmlHandle docHandle(&xml_doc);TiXmlElement *child = docHandle.FirstChild("html").FirstChild("body").FirstChild("svg").ToElement();for (child; child; child = child->NextSiblingElement()) {string xmlnsStr = child->Attribute("xmlns");string versionStr = child->Attribute("version");std::cout << "xmlns :" << xmlnsStr<< " version" << versionStr << std::endl;TiXmlElement *circleItem = child->FirstChild()->ToElement();string cxStr = circleItem->Attribute("cx");string cyStr = circleItem->Attribute("cy");string rxStr = circleItem->Attribute("rx");string ryStr = circleItem->Attribute("ry");string strokeStr = circleItem->Attribute("stroke");string stroke_widthStr = circleItem->Attribute("stroke-width");string fillStr = circleItem->Attribute("fill");std::cout << "cx :" << cxStr<< " cy :" << cyStr<< " rx :" << rxStr<< " ry :" << ryStr<< " stroke :" << strokeStr<< " stroke-width :" << stroke_widthStr<< " fill :" << fillStr << std::endl;}}void parsePolygonSVG(TiXmlDocument &xml_doc) {TiXmlHandle docHandle(&xml_doc);TiXmlElement *child = docHandle.FirstChild("html").FirstChild("body").FirstChild("svg").ToElement();for (child; child; child = child->NextSiblingElement()) {string xmlnsStr = child->Attribute("xmlns");string versionStr = child->Attribute("version");std::cout << "xmlns :" << xmlnsStr<< " version" << versionStr << std::endl;TiXmlElement *circleItem = child->FirstChild()->ToElement();string pointsStr = circleItem->Attribute("points");string strokeStr = circleItem->Attribute("stroke");string stroke_widthStr = circleItem->Attribute("stroke-width");string fillStr = circleItem->Attribute("fill");std::cout << "points :" << pointsStr<< " stroke :" << strokeStr<< " stroke-width :" << stroke_widthStr<< " fill :" << fillStr << std::endl;}}void parseLineSVG(TiXmlDocument &xml_doc) {TiXmlHandle docHandle(&xml_doc);TiXmlElement *child = docHandle.FirstChild("html").FirstChild("body").FirstChild("svg").ToElement();for (child; child; child = child->NextSiblingElement()) {string xmlnsStr = child->Attribute("xmlns");string versionStr = child->Attribute("version");std::cout << "xmlns :" << xmlnsStr<< " version" << versionStr << std::endl;TiXmlElement *circleItem = child->FirstChild()->ToElement();string x1Str = circleItem->Attribute("x1");string y1Str = circleItem->Attribute("y1");string x2Str = circleItem->Attribute("x2");string y2Str = circleItem->Attribute("y2");string strokeStr = circleItem->Attribute("stroke");string stroke_widthStr = circleItem->Attribute("stroke-width");string fillStr = circleItem->Attribute("fill");std::cout << "x1 :" << x1Str<< " x1 :" << y1Str<< " x2 :" << x2Str<< " y2 :" << y2Str<< " stroke :" << strokeStr<< " stroke-width :" << stroke_widthStr<< " fill :" << fillStr << std::endl;}}void parsePolylineSVG(TiXmlDocument &xml_doc) {TiXmlHandle docHandle(&xml_doc);TiXmlElement *child = docHandle.FirstChild("html").FirstChild("body").FirstChild("svg").ToElement();for (child; child; child = child->NextSiblingElement()) {string xmlnsStr = child->Attribute("xmlns");string versionStr = child->Attribute("version");std::cout << "xmlns :" << xmlnsStr<< " version" << versionStr << std::endl;TiXmlElement *circleItem = child->FirstChild()->ToElement();string pointsStr = circleItem->Attribute("points");string strokeStr = circleItem->Attribute("stroke");string stroke_widthStr = circleItem->Attribute("stroke-width");string fillStr = circleItem->Attribute("fill");std::cout << "points :" << pointsStr<< " stroke :" << strokeStr<< " stroke-width :" << stroke_widthStr<< " fill :" << fillStr << std::endl;}}void parsePathSVG(TiXmlDocument &xml_doc) {TiXmlHandle docHandle(&xml_doc);TiXmlElement *child = docHandle.FirstChild("html").FirstChild("body").FirstChild("svg").ToElement();for (child; child; child = child->NextSiblingElement()) {string xmlnsStr = child->Attribute("xmlns");string versionStr = child->Attribute("version");std::cout << "xmlns :" << xmlnsStr<< " version" << versionStr << std::endl;TiXmlElement *pathItem = child->FirstChild()->ToElement();string dStr = pathItem->Attribute("d");string strokeStr = pathItem->Attribute("stroke");string stroke_widthStr = pathItem->Attribute("stroke-width");string fillStr = pathItem->Attribute("fill");std::cout << "d :" << dStr<< " stroke :" << strokeStr<< " stroke-width :" << stroke_widthStr<< " fill :" << fillStr << std::endl;}}void constructCircle() {TiXmlDocument xml_doc_Circle;std::string exampleCircle = "Circle.svg"; // 可以改成xml后缀createCircleSVG(xml_doc_Circle);xml_doc_Circle.SaveFile(exampleCircle.c_str());parseCircleSVG(xml_doc_Circle);}void constructRect() {TiXmlDocument xml_doc_Rect;std::string exampleRect = "Rect.svg"; // 可以改成xml后缀createRectSVG(xml_doc_Rect);// 保存到文件xml_doc_Rect.SaveFile(exampleRect.c_str());parseRectSVG(xml_doc_Rect);}void constructEllipse() {TiXmlDocument xml_doc_Ellipse;std::string exampleEllipse = "Ellipse.svg"; // 可以改成xml后缀createEllipseSVG(xml_doc_Ellipse);xml_doc_Ellipse.SaveFile(exampleEllipse.c_str());parseEllipseSVG(xml_doc_Ellipse);}void constructPolygon() {TiXmlDocument xml_doc_Polygon;std::string examplePolygon = "Polygon.svg"; // 可以改成xml后缀createPolygonSVG(xml_doc_Polygon);xml_doc_Polygon.SaveFile(examplePolygon.c_str());parsePolygonSVG(xml_doc_Polygon);}void constructLine() {TiXmlDocument xml_doc_Line;std::string exampleLine = "Line.svg"; // 可以改成xml后缀createLineSVG(xml_doc_Line);xml_doc_Line.SaveFile(exampleLine.c_str());parseLineSVG(xml_doc_Line);}void constructPolyline() {TiXmlDocument xml_doc_Polyline;std::string examplePolyline = "Polyline.svg"; // 可以改成xml后缀createPolylineSVG(xml_doc_Polyline);xml_doc_Polyline.SaveFile(examplePolyline.c_str());parsePolylineSVG(xml_doc_Polyline);}void constructPath(){TiXmlDocument xml_doc_Path;std::string examplePath = "Path.svg"; // 可以改成xml后缀createPathSVG(xml_doc_Path);xml_doc_Path.SaveFile(examplePath.c_str());parsePathSVG(xml_doc_Path);}string& replace_all(string& str, const string& old_value, const string& new_value)
{while( true ) {string::size_type pos(0);if( (pos=str.find(old_value))!=string::npos )str.replace(pos,old_value.length(),new_value);else break ;}return str;
}void splitStr(const char *strCh, vector<Point> &vPolygonPoint,bool connectFlag=true) {char pathArray[10]= {'M','L','H','V','C','S','Q','T','A','Z'};string temp=string(strCh);for(int i=0;i<sizeof(pathArray)/sizeof(char);i++){string str(1,pathArray[i]);temp= replace_all(temp,str,"");string lowStr(1,pathArray[i]+32);temp= replace_all(temp,   lowStr,"");}strCh=temp.c_str();const char *d = " ,";char *p;p = strtok((char *) strCh, d);char *q = p;int firstValue = atoi(p);int secondValue = 0;int i = 0;while (p) {firstValue = atoi(p);// printf("%s\n",p);p = strtok(NULL, d);secondValue = atoi(p);if (i % 2 == 0) {vPolygonPoint.push_back(Point(firstValue, secondValue));//存储坐标}i++;}firstValue = atoi(q);if(connectFlag){vPolygonPoint.push_back(Point(firstValue, secondValue));//存储坐标}
}void savePoint(Mat Img, vector<Point> &circlePoint) {// img-gray; 将opencv-circle函数绘制的圆 转成 opencv-polylines 绘制  并记录外轮廓的点for (int i = 0; i < Img.rows; i++) {for (int j = 0; j < Img.cols; j++) {if (Img.at<uchar>(i, j) == 255) {circlePoint.push_back(Point(j, i));break;}else if( Img.at<uchar>(Img.rows-i, Img.cols-j) == 255){circlePoint.push_back(Point(Img.cols-j, Img.rows-i));break;}}}}void paraseSVG(string svg1,string svg2,map<string, int> &m_svgType,vector<Point> &circlePoint,vector<Point> &rectPoint,vector<Point> &ellipsePoint,vector<Point> &polygonPoint,vector<Point> &linePoint,vector<Point> &polygonLine,vector<Point> &path,int &id0,int &id1,int width,int height) {std::cout << "----------------------------------accept two svg file to prase -----------------------------------"<< std::endl;TiXmlDocument xml_doc1;if (!xml_doc1.LoadFile(svg1.c_str())) {cerr << xml_doc1.ErrorDesc() << endl;return;}TiXmlDocument xml_doc2;if (!xml_doc2.LoadFile(svg2.c_str())) {cerr << xml_doc2.ErrorDesc() << endl;return;}cv::Mat img(height, width, CV_8UC1, Scalar(0, 0, 0));cv::Mat circleImg = img.clone();cv::Mat ellipseImg = img.clone();std::vector<TiXmlDocument> vec_xml_doc;vec_xml_doc.push_back(xml_doc1);vec_xml_doc.push_back(xml_doc2);for (int i = 0; i < vec_xml_doc.size(); i++) {TiXmlHandle docHandle(&vec_xml_doc[i]);TiXmlElement *child = docHandle.FirstChild("html").FirstChild("body").FirstChild("svg").ToElement();for (child; child; child = child->NextSiblingElement()) {string xmlnsStr = child->Attribute("xmlns");string versionStr = child->Attribute("version");std::cout << "xmlns :" << xmlnsStr<< " version" << versionStr << std::endl;TiXmlElement *Item = child->FirstChild()->ToElement();if (Item != NULL) {if(i==0) {id0=m_svgType[child->FirstChild()->Value()];}else {id1=m_svgType[child->FirstChild()->Value()];}switch (m_svgType[child->FirstChild()->Value()]) {//进行类型判断进行case 0: {std::cout << " processing   " << child->FirstChild()->Value() << "   number "<< m_svgType[child->FirstChild()->Value()] << std::endl;string cxStr = Item->Attribute("cx");string cyStr = Item->Attribute("cy");string rStr = Item->Attribute("r");string strokeStr = Item->Attribute("stroke");string stroke_widthStr = Item->Attribute("stroke-width");string fillStr = Item->Attribute("fill");circle(circleImg, Point(atoi(cxStr.c_str()), atoi(cyStr.c_str())), atoi(rStr.c_str()),Scalar(255, 255, 255), 1, 8);savePoint(circleImg, circlePoint);// circle(img, Point(atoi(cxStr.c_str()), atoi(cyStr.c_str())), atoi(rStr.c_str()), Scalar(255, 255, 255), 1, 8);polylines(img, circlePoint, false, Scalar(255, 255, 255), 1, 8);std::cout << "cx :" << cxStr<< " cy :" << cyStr<< " r :" << rStr<< " stroke :" << strokeStr<< " stroke-width :" << stroke_widthStr<< " fill :" << fillStr << std::endl;break;}case 1: {std::cout << "processing " << child->FirstChild()->Value() << " number "<< m_svgType[child->FirstChild()->Value()] << std::endl;string xStr = Item->Attribute("x");string yStr = Item->Attribute("y");string widthStr = Item->Attribute("width");string heightStr = Item->Attribute("height");string strokeStr = Item->Attribute("stroke");string stroke_widthStr = Item->Attribute("stroke-width");string fillStr = Item->Attribute("fill");rectPoint.push_back(Point(atoi(xStr.c_str()), atoi(yStr.c_str())));rectPoint.push_back(Point(atoi(xStr.c_str()) + atoi(widthStr.c_str()), atoi(yStr.c_str())));rectPoint.push_back(Point(atoi(xStr.c_str()) + atoi(widthStr.c_str()),atoi(yStr.c_str()) + atoi(heightStr.c_str())));rectPoint.push_back(Point(atoi(xStr.c_str()), atoi(yStr.c_str()) + atoi(heightStr.c_str())));rectPoint.push_back(Point(atoi(xStr.c_str()), atoi(yStr.c_str())));//rectangle(img, Point(atoi(xStr.c_str()), atoi(yStr.c_str())),Point(atoi(xStr.c_str()) + atoi(widthStr.c_str()),atoi(yStr.c_str()) + atoi(heightStr.c_str())), Scalar(255, 255, 255), 1, 8);polylines(img, rectPoint, true, Scalar(255, 255, 255), 1, 8);std::cout << "x :" << xStr<< " y :" << yStr<< " width :" << widthStr<< " height :" << heightStr<< " stroke :" << strokeStr<< " stroke-width :" << stroke_widthStr<< " fill :" << fillStr << std::endl;break;}case 2: {std::cout << "processing " << child->FirstChild()->Value() << " number "<< m_svgType[child->FirstChild()->Value()] << std::endl;string cxStr = Item->Attribute("cx");string cyStr = Item->Attribute("cy");string rxStr = Item->Attribute("rx");string ryStr = Item->Attribute("ry");string strokeStr = Item->Attribute("stroke");string stroke_widthStr = Item->Attribute("stroke-width");string fillStr = Item->Attribute("fill");ellipse(ellipseImg, Point(atoi(cxStr.c_str()), atoi(cyStr.c_str())),Size(atoi(rxStr.c_str()), atoi(ryStr.c_str())), 45, 0, 360, Scalar(255, 255, 255), 1,8);savePoint(ellipseImg, ellipsePoint);// ellipse(img, Point(atoi(cxStr.c_str()), atoi(cyStr.c_str())),Size(atoi(rxStr.c_str()), atoi(ryStr.c_str())), 45, 0, 360, Scalar(255, 255, 255), 1,8);polylines(img, ellipsePoint, true, Scalar(255, 255, 255), 1, 8);std::cout << "cx :" << cxStr<< " cy :" << cyStr<< " rx :" << rxStr<< " ry :" << ryStr<< " stroke :" << strokeStr<< " stroke-width :" << stroke_widthStr<< " fill :" << fillStr << std::endl;break;}case 3: {std::cout << "processing " << child->FirstChild()->Value() << " number "<< m_svgType[child->FirstChild()->Value()] << std::endl;string pointsStr = Item->Attribute("points");string strokeStr = Item->Attribute("stroke");string stroke_widthStr = Item->Attribute("stroke-width");string fillStr = Item->Attribute("fill");splitStr(pointsStr.c_str(), polygonPoint,true);polylines(img, polygonPoint, false, Scalar(255, 255, 255), 1, 8);std::cout << "points :" << pointsStr<< " stroke :" << strokeStr<< " stroke-width :" << stroke_widthStr<< " fill :" << fillStr << std::endl;break;}case 4: {std::cout << " processing " << child->FirstChild()->Value() << " number "<< m_svgType[child->FirstChild()->Value()] << std::endl;string x1Str = Item->Attribute("x1");string y1Str = Item->Attribute("y1");string x2Str = Item->Attribute("x2");string y2Str = Item->Attribute("y2");string strokeStr = Item->Attribute("stroke");string stroke_widthStr = Item->Attribute("stroke-width");string fillStr = Item->Attribute("fill");// line(img, Point(atoi(x1Str.c_str()), atoi(y1Str.c_str())),Point(atoi(x2Str.c_str()), atoi(y2Str.c_str())), Scalar(255, 255, 255), 1, 8);linePoint.push_back(Point(atoi(x1Str.c_str()), atoi(y1Str.c_str())));linePoint.push_back(Point(atoi(x2Str.c_str()), atoi(y2Str.c_str())));polylines(img, linePoint, false, Scalar(255, 255, 255), 1, 8);std::cout << "x1 :" << x1Str<< " y1 :" << y1Str<< " x2 :" << x2Str<< " y2 :" << y2Str<< " stroke :" << strokeStr<< " stroke-width :" << stroke_widthStr<< " fill :" << fillStr << std::endl;break;}case 5: {std::cout << "processing " << child->FirstChild()->Value() << " number "<< m_svgType[child->FirstChild()->Value()] << std::endl;string pointsStr = Item->Attribute("points");string strokeStr = Item->Attribute("stroke");string stroke_widthStr = Item->Attribute("stroke-width");string fillStr = Item->Attribute("fill");splitStr(pointsStr.c_str(), polygonLine,false);polylines(img, polygonLine, false, Scalar(255, 255, 255), 1, 8);std::cout << "points :" << pointsStr<< " stroke :" << strokeStr<< " stroke-width :" << stroke_widthStr<< " fill :" << fillStr << std::endl;break;}case 6: {std::cout << "processing " << child->FirstChild()->Value() << " number "<< m_svgType[child->FirstChild()->Value()] << std::endl;string pointsStr = Item->Attribute("d");string strokeStr = Item->Attribute("stroke");string stroke_widthStr = Item->Attribute("stroke-width");string fillStr = Item->Attribute("fill");splitStr(pointsStr.c_str(), path,true);polylines(img, path, false, Scalar(255, 255, 255), 1, 8);std::cout << "d :" << pointsStr<< " stroke :" << strokeStr<< " stroke-width :" << stroke_widthStr<< " fill :" << fillStr << std::endl;break;}default: {std::cout << " the type is not existed   " << child->FirstChild()->Value() << " number "<< m_svgType[child->FirstChild()->Value()] << std::endl;break;}}}}}
// ---------------------------------------------------上一步，将所有图形转成坐标点------------------------------------------------------------------------------------imwrite("allPolygons.jpg", img);}string convertIntToString(int valueInt)
{stringstream ss;ss<<valueInt;return ss.str();
}
string  convertStrPolgon(vector<Point> vec ){string str="";for(int i=0;i<vec.size();i++){if(i!=vec.size()-1){str+= convertIntToString(vec[i].x)+" "+convertIntToString(400-vec[i].y)+string(",");}else {str+=convertIntToString( vec[i].x)+" "+convertIntToString(400-vec[i].y);}}return "POLYGON(("+str+"))";
}
void combineGraph(vector<Point> vec1,vector<Point> vec2,int width,int height)
{ /// Create two polygonsPolygonType singlePolygon1;PolygonType singlePolygon2;string a=convertStrPolgon(vec1);string b=convertStrPolgon(vec2);boost::geometry::read_wkt(a, singlePolygon1);boost::geometry::read_wkt(b, singlePolygon2);boost::geometry::correct(singlePolygon1);boost::geometry::correct(singlePolygon2);/// Run union and check validity (should fail check)MultiPolygonType unionResult;boost::geometry::union_(singlePolygon1, singlePolygon2, unionResult);boost::geometry::validity_failure_type failure_type;if(!boost::geometry::is_valid(unionResult, failure_type)) {std::cout << "Result of union operation is not valid! " << failure_type << std::endl; // failure_type is 21 == failure_self_intersections}// Put these into the same type so that they can be passed to WritePolygonsToSVGMultiPolygonType polygon1;polygon1.push_back(singlePolygon1);MultiPolygonType polygon2;polygon2.push_back(singlePolygon2);std::vector<MultiPolygonType> polygons = {polygon1, polygon2, unionResult};WritePolygonsToSVG(polygons[0],"A.svg");WritePolygonsToSVG(polygons[1],"B.svg");WritePolygonsToSVG(polygons[2],"C.svg");WritePolygonsToSVG(unionResult,"allPolygons.svg");
}void processSVG(string svg1, string svg2)
{vector<Point> circlePoint;vector<Point> rectPoint;vector<Point> ellipsePoint;vector<Point> polygonPoint;vector<Point> linePoint;vector<Point> polygonLine;vector<Point> path;int height=1080;int width=1920;//存储各个图形的边界点map<string, int> m_svgType = {{"circle",  0},{"rect",    1},{"ellipse", 2},{"polygon", 3},{"line",    4},{"polyline", 5},{"path",    6}};int id0=0;int id1=0;//图形的类型paraseSVG( svg1,  svg2,m_svgType,circlePoint,rectPoint,ellipsePoint,polygonPoint,linePoint,polygonLine,path,id0,id1,width,height );map<int, vector<Point> > m_vecType = {{   0,circlePoint},{     1,rectPoint},{  2,ellipsePoint},{  3,polygonPoint},{    4,linePoint},{  5,polygonLine},{     6,path}};combineGraph(m_vecType[id0],  m_vecType[id1],width,height);}int main() {constructCircle();constructRect();constructEllipse();constructPolygon();constructLine();constructPolyline();constructPath();// 也可以读取文件 进行解析string svg2 = "Path.svg";string svg1 = "Circle.svg";processSVG(svg1, svg2);std::cout << std::endl << "xml generate accomplished!" << std::endl;return 0;
}

测试结果

F:\untitled\cmake-build-debug\untitled.exe
xmlns :http://www.w3.org/2000/svg version1.1
cx :100 cy :50 r :40 stroke :black stroke-width :2 fill :none
xmlns :http://www.w3.org/2000/svg version1.1
x :300 y :100 width :300 height :100 stroke :black stroke-width :2 fill :none
xmlns :http://www.w3.org/2000/svg version1.1
cx :300 cy :80 rx :100 ry :50 stroke :black stroke-width :2 fill :red
xmlns :http://www.w3.org/2000/svg version1.1
points :200,10 250,190 160,210 stroke :black stroke-width :2 fill :none
xmlns :http://www.w3.org/2000/svg version1.1
x1 :100 x1 :100 x2 :400 y2 :400 stroke :black stroke-width :2 fill :none
xmlns :http://www.w3.org/2000/svg version1.1
points :20,20 40,25 60,40 80,120 120,140 200,180 stroke :black stroke-width :2 fill :none
xmlns :http://www.w3.org/2000/svg version1.1
d :M150 0 L75 200 L225 200 Z stroke :black stroke-width :2 fill :none
----------------------------------accept two svg file to prase -----------------------------------
xmlns :http://www.w3.org/2000/svg version1.1processing   circle   number 0
cx :100 cy :50 r :40 stroke :black stroke-width :2 fill :none
xmlns :http://www.w3.org/2000/svg version1.1
processing path number 6
d :M150 0 L75 200 L225 200 Z stroke :black stroke-width :2 fill :nonexml generate accomplished!Process finished with exit code 0

opencv的图形

合并结果svg

代码还有点问题，待修改

svg内部数据

<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg width="100%" height="100%" version="1.1"
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink">
<g fill-rule="evenodd"><path d="M 188,68 L 216,0 L 366,400 L 66,400 L 152,170 L 150,172 L 146,174 L 140,176 L 132,178 L 116,180 L 100,178 L 92,176 L 86,174 L 82,172 L 78,170 L 74,168 L 72,166 L 68,164 L 66,162 L 64,160 L 62,158 L 60,156 L 58,154 L 56,152 L 54,150 L 52,148 L 52,146 L 50,144 L 48,142 L 48,140 L 46,138 L 46,136 L 44,134 L 44,132 L 42,130 L 42,128 L 42,126 L 40,124 L 40,122 L 40,120 L 40,118 L 38,116 L 38,114 L 38,112 L 38,110 L 38,108 L 38,106 L 38,104 L 38,102 L 36,100 L 38,98 L 38,96 L 38,94 L 38,92 L 38,90 L 38,88 L 38,86 L 38,84 L 40,82 L 40,80 L 40,78 L 40,76 L 42,74 L 42,72 L 42,70 L 44,68 L 44,66 L 46,64 L 46,62 L 48,60 L 48,58 L 50,56 L 52,54 L 52,52 L 54,50 L 56,48 L 58,46 L 60,44 L 62,42 L 64,40 L 66,38 L 68,36 L 72,34 L 74,32 L 78,30 L 82,28 L 86,26 L 92,24 L 100,22 L 116,20 L 132,22 L 140,24 L 146,26 L 150,28 L 154,30 L 158,32 L 160,34 L 164,36 L 166,38 L 168,40 L 170,42 L 172,44 L 174,46 L 176,48 L 178,50 L 180,52 L 180,54 L 182,56 L 184,58 L 184,60 L 186,62 L 186,64 L 188,66 L 188,68 z " style="fill:rgb(255,128,0);stroke:rgb(0,0,100);stroke-width:1"/></g>
</svg>

参考：計算幾何 - boostjp

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