Mapinfo加载图片文件通用类

  工作中用到将图片文件加载到mapinfo中以打印，下面共享用与图片加载的通用类：CLoadImg2MI

  并在最后给出一个简单示例。请注意，在将图片加载到mapinfo前需要创建一个关联该图片的tab文件，同时在该文件中指定控制点坐标（最少需要三个，下文使用的是图片四个顶点，用于一般的非GIS图片）、映射坐标系、数据版本、坐标单位等。

 

 因为时间关系，写得比较匆忙，若有人指出错误，将非常感谢。同时，欢迎GIS同行与我交流。

// LoadImg2MI.h: interface for the CLoadImg2MI class./********************************************************************created:2009/02/24created:24:2:2009 14:44filename: E:/项目//NaviHighWayPrintArea/LoadImg2MI.hfile path:E:/项目//NaviHighWayPrintAreafile base:LoadImg2MIfile ext:hauthor:Lonefoxpurpose:该类用于在mapinfo中加载图片*********************************************************************///////////////////////////////////////////////////////////////////////#if !defined(AFX_LOADIMG2MI_H__B0A520BC_9378_4CEF_8B01_7A44FE2D4356__INCLUDED_)#define AFX_LOADIMG2MI_H__B0A520BC_9378_4CEF_8B01_7A44FE2D4356__INCLUDED_#if _MSC_VER > 1000#pragma once#endif // _MSC_VER > 1000#include "mapinfow.h"enum UnitName //坐标单位，未列举所有支持的单位{unPoint, unCM, unMeter, unDegree};struct ControlPoint //图片匹配控制点 {doubleXinPic;//图片中坐标doubleYinPic; doubleXinMap; //映射后坐标doubleYinMap; CStringName;//控制点名public:voidSetPoint(double x, double y, double newx, double newy, const CString& name){this->XinPic = x;this->YinPic = y;this->XinMap = newx;this->YinMap = newy;this->Name = name;}};class CLoadImg2MI {public:CLoadImg2MI();virtual ~CLoadImg2MI();ControlPoint*CreateControlPoints(double xP1, double yP1, double xM1, double yM1, double xP2, double yP2,double xM2, double yM2); //根据对角两点坐标创建四元素控制点数组voidReleaseControlPoints(ControlPoint* pPoints);//删除控制点数组voidSetPicturePath(const CString& Path); //设置图片完整路径voidSetMapUnit(const UnitName Unit); //设置地图单位voidSetControlPoints(ControlPoint* const pPoints, int nCount);//设置控制点数组boolLoadImage(DMapInfo* const pMap, CString TabName = ""); //加载图片到mapinfoprotected:boolCreateTabFile(const CString& FileName = "");//由图片文件生成tab文件virtual CString GetCharset() { return "WindowsSimpChinese"; }//字符集virtual CString GetCoordSys() { return "CoordSys Earth Projection 1, 0"; }//获取投影坐标系virtual CStringGetUnitStr(const UnitName Unit); //获取坐标单位字符串，未写完所有支持的单位，可修改protected:CStringm_strPicPath; //图片路径CStringm_strTabPath; //转换后的Tab文件路径UnitNamem_unMapUnit; //地图坐标单位ControlPoint*m_pPoints; //控制点数组intm_nCPCount; //控制点个数};#endif // !defined(AFX_LOADIMG2MI_H__B0A520BC_9378_4CEF_8B01_7A44FE2D4356__INCLUDED_)  

下面是CPP // LoadImg2MI.cpp: implementation of the CLoadImg2MI class.////////////////////////////////////////////////////////////////////////#include "stdafx.h"#include "LoadImg2MI.h"#ifdef _DEBUG#undef THIS_FILEstatic char THIS_FILE[]=__FILE__;#define new DEBUG_NEW#endif//////////////////////////////////////////////////////////////////////// Construction/Destruction//////////////////////////////////////////////////////////////////////CLoadImg2MI::CLoadImg2MI(){m_nCPCount = 0;m_pPoints = NULL;m_strPicPath = m_strTabPath = _T("");m_unMapUnit = unDegree; //默认度}CLoadImg2MI::~CLoadImg2MI(){}/************************************************* Function : CLoadImg2MI::CreateControlPoints Description : 根据对角两点坐标创建四元素控制点数组,两个点是两个对角点位 Calls : Called By : Parameter : [double xP1] --- 图片上坐标1x : [double yP1] --- 图片上坐标1y : [double xM1] --- 地图中对应坐标1x : [double yM1] --- 地图中对应坐标1y : [double xP2] --- 图片上坐标2x : [double yP2] --- 图片上坐标2y : [double xM2] --- 地图中对应坐标2x : [double yM2] --- 地图中对应坐标2y Return : ControlPoint* --- 控制点数组，四个元素 Author : Lonefox Date : 2009-02-24 Modify : *************************************************/ControlPoint* CLoadImg2MI::CreateControlPoints( double xP1, double yP1, double xM1, double yM1, double xP2, double yP2, double xM2, double yM2 ){ControlPoint* Points = new ControlPoint[4];Points[0].SetPoint(xP1, yP1, xM1, yM1, "pt 1");Points[1].SetPoint(xP2, yP1, xM2, yM1, "pt 2");Points[2].SetPoint(xP2, yP2, xM2, yM2, "pt 3");Points[3].SetPoint(xP1, yP2, xM1, yM2, "pt 4");return Points;}void CLoadImg2MI::SetPicturePath( const CString& Path ){ASSERT(Path != "");this->m_strPicPath = Path;}void CLoadImg2MI::SetMapUnit( const UnitName Unit ){this->m_unMapUnit = Unit;}CString CLoadImg2MI::GetUnitStr( const UnitName Unit ){switch (Unit){case unDegree: return "degree"; break;case unCM : return "cm"; break;default: return "ft";}}/************************************************* Function : CLoadImg2MI::CreateTabFile Description : 根据图片文件创建tab文件 Calls : Called By : Parameter : [const CString& FileName] --- 要生成的文件名,不包含扩展名，默认空时和图片名相同 Return : bool --- 成功返回true，否则返回false Author : Lonefox Date : 2009-02-24 Modify : *************************************************/bool CLoadImg2MI::CreateTabFile(const CString& FileName /* = "" */){/************************************************************************//* Tab文本输出内容!table!version 300!charset WindowsSimpChinese Definition Table File "无标题.bmp" Type "RASTER" (116.293547,39.990871) (6,4) Label "LeftTop", (116.295386,39.990954) (990,5) Label "RightTop", (116.293474,39.990452) (18,742) Label "LeftDown", (116.295422,39.990438) (1000,749) Label "RightDown" CoordSys Earth Projection 1, 0 Units "degree" *//************************************************************************///1.数据校验ASSERT(this->m_strPicPath != "");if (GetFileAttributes(this->m_strPicPath) == 0xFFFFFFFF)//文件可能不存在{TRACE(FileName + "可能文件不存在!/n");return false;}//2.获取tab路径CString strFileName("");int nPos = 0;if ( (nPos = m_strPicPath.ReverseFind('//')) == -1 ){return false;}strFileName = m_strPicPath.Mid(nPos + 1);//获取文件名if (FileName == "") //使用和pic相同的tab名{if ( (nPos = m_strPicPath.ReverseFind('.')) == -1 ) //查找扩展名{return false;}m_strTabPath = m_strPicPath.Left(nPos) + ".tab"; //tab文件路径}else{m_strTabPath.Format("%s//%s.tab", m_strPicPath.Left(nPos), FileName); //新tab文件名}//3.生成tab文件CStdioFile f;if (!f.Open(m_strTabPath, CFile::modeCreate | CFile::modeWrite | CFile::shareDenyWrite)){return false;}f.WriteString("!table/n");f.WriteString("!version 300/n");f.WriteString("!charset " + GetCharset() + "/n/n");f.WriteString("Definition Table/n");f.WriteString("File /"");f.WriteString(strFileName);f.WriteString("/"/n");f.WriteString("Type /"RASTER/"/n");//3.1生成控制点信息if (m_nCPCount > 0 && m_pPoints){CString strTmp(_T(""));for (int nIndex = 0; nIndex < m_nCPCount - 1; nIndex++){strTmp.Format("(%f,%f) (%f,%f) Label /"%s/",/n", //先地图坐标后图片坐标m_pPoints[nIndex].XinMap, m_pPoints[nIndex].YinMap, m_pPoints[nIndex].XinPic, m_pPoints[nIndex].YinPic, m_pPoints[nIndex].Name);f.WriteString(strTmp);}strTmp.Format("(%f,%f) (%f,%f) Label /"%s/"/n", m_pPoints[m_nCPCount - 1].XinMap, m_pPoints[m_nCPCount - 1].YinMap, m_pPoints[m_nCPCount - 1].XinPic, m_pPoints[m_nCPCount - 1].YinPic, m_pPoints[m_nCPCount - 1].Name);f.WriteString(strTmp);}//3.3写投影系f.WriteString(GetCoordSys());f.WriteString("/n");//3.4写地图单位f.WriteString("Units /"");f.WriteString(GetUnitStr(m_unMapUnit)); //获取地图单位f.WriteString("/"/n");f.Close();return true;}void CLoadImg2MI::ReleaseControlPoints( ControlPoint* pPoints ){if (pPoints){delete []pPoints;pPoints = NULL;}}void CLoadImg2MI::SetControlPoints( ControlPoint* const pPoints, int nCount ){ASSERT(nCount != 0 || pPoints != NULL);m_pPoints = pPoints;m_nCPCount = nCount;}/************************************************* Function : CLoadImg2MI::LoadImage Description : 加载图片到mapinfo Calls : Called By : Parameter : [const DMapInfo* pMap] --- mapbasic指针 : [CString TabName ] --- 图片加载后的表名，空时使用mapinfo默认表名 Return : bool --- 成功返回true，失败返回false Author : Lonefox Date : 2009-02-24 Modify : *************************************************/bool CLoadImg2MI::LoadImage( DMapInfo* const pMap, CString TabName /*= ""*/ ){ASSERT(pMap != NULL);ASSERT(this->m_strPicPath != "");if (!this->CreateTabFile(TabName)) //创建tab文件失败{return false;}if (this->m_strTabPath == ""){return false;}//开始加载CString strCmd(_T(""));if (TabName != ""){strCmd.Format("Open Table /"%s/" AS %s Interactive", m_strTabPath, TabName);}else{strCmd.Format("Open Table /"%s/" Interactive", m_strTabPath);}pMap->Do(strCmd); //加载return true;}

 

应用示例：

CLoadImg2MI LoadImg;ControlPoint* pPoints = LoadImg.CreateControlPoints(gdXLeftDown, gdYLeftDown, x1, y1,gdXRightUp, gdYRightUp, x2, y2); //创建控制点LoadImg.SetMapUnit(unCM);LoadImg.SetPicturePath(strPath);LoadImg.SetControlPoints(pPoints, 4);if (!LoadImg.LoadImage(&mapinfo, strPatternLayer)) //加载失败{ASSERT(NULL);}LoadImg.ReleaseControlPoints(pPoints);

 

注意：UnitName和GetUnitStr只简单写了我用到的单位，使用者可以自行修改扩充。

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