C++ 如何调用windows API实现图片打印

最新推荐文章于 2025-09-05 12:51:02 发布

原创最新推荐文章于 2025-09-05 12:51:02 发布 · 3.6k 阅读

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CC 4.0 BY-SA版权

本文介绍了一种使用C++进行图片打印的方法。首先将图片绘制到HDC上，然后枚举本地打印机并获取打印机信息，最后完成图片打印。涉及的技术包括使用CImage类加载和绘制图片、枚举本地打印机及创建设备上下文。

头文件

#include "io.h"
#include <winspool.h>
#include <iostream>

#include <vectod>

using namespace std;

定义变量

CString m_PrinterDriverName;
CString m_PrinterPort;
CString m_PrinterName;

//步骤一将图片绘制到HDC上

PicPath:图片路径

Lcoordinate、Rcoordinate 绘制起始坐标
wratio：宽（放大/缩小）比率

hratio：高（放大/缩小）比率

bool PictureToDc(HDC hDC,CString PicPath,int Lcoordinate,int Rcoordinate,float wratio,float hratio)

{

   ATL::CImage image; //使用图片类
   image.Load(strPic);
   int pwidth=(int)(image.GetWidth()) * wratio;
   int phight=(int)(image.GetHeight()) * hratio;
   image.Draw(hDC,Lcoordinate,Rcoordinate,pwidth,phight);
   DeleteObject(image);
   return 0;

}

步骤二

枚举本地打印机

LONG DEV_FindPrinter(CString devName)

{

int iRet = 0 ;
   int i ;
   DWORD dwNeed ;
   DWORD dwRet ;
   DWORD dwBuffLen = 0;
   BYTE *pBuffer ;
   BYTE *pTmpBuffer ;
   PRINTER_INFO_2 pInfo ;

   EnumPrinters( PRINTER_ENUM_LOCAL, NULL, 2, NULL, 0, &dwNeed, &dwRet ) ;
   pBuffer = new BYTE[dwNeed] ;
   if ( pBuffer == NULL )
   {
       iRet = -1;

   }
   else
   {
       dwBuffLen = dwNeed ;
   }

if ( iRet == 0 )
{
Need = dwNeed;

   iRet = EnumPrinters( PRINTER_ENUM_LOCAL, NULL, 2, pBuffer, dwBuffLen, &dwNeed, &dwRet ) ;
       if ( iRet == 0 )
       {
           iRet = -1
       }
       else
       {
           iRet = 0 ;
       }
   }

   if ( iRet == 0 )
   {
       pTmpBuffer = pBuffer ;
       for ( i = 0 ; i < (int)dwRet ; i++ )
       {
           memcpy( &pInfo, pTmpBuffer, sizeof(pInfo) ) ;

   CString spPrinterName = pInfo.pPrinterName;
           if (spPrinterName == devName)
           {

   m_PrinterPort= pInfo.pPortName;
               m_PrinterDriverName= pInfo.pDriverName;

               iRet = 0 ;
               break;
           }
           else
           {
               iRet = -1;
           }

           pTmpBuffer += sizeof(pInfo) ;
       }
   }

   if (iRet!=0)
   {
       m_PrinterName="No printer available";
       m_PrinterPort= "";
   }

return iRet ;

}

步骤三：打印图片

int PrintPicture(CString devName,CString picPath,int Lcord,int Rcord,float wRatio,float hRatio)

{

   CString str;
   DWORD   dwError;
   int iRet=0;
   DOCINFO di;
   ZeroMemory(&di,sizeof(DOCINFO));
   di.cbSize = sizeof(DOCINFO);
   di.lpszDocName = NULL;
   di.lpszOutput = NULL;//"FILE:";
   di.lpszDatatype =_T("raw");
   iRet = DEV_FindPrinter(devName);
   if(iRet != 0)
       return iRet;

   HDC hdcPrint=CreateDC(m_PrinterDriverName,devName,NULL,NULL);
   if(hdcPrint != NULL)
   {
       if(StartDoc(hdcPrint,&di)>0) //开始执行一个打印作业
       {
           if(StartPage(hdcPrint)>0) //走纸，开始打印
           {
               CString strPath(picPath);
               iRet =PrintPicture(hdcPrint,strPath,Lcoordinate,Rcoordinate,wratio,hratio);
               if(iRet != 0)
               {
                   AfxMessageBox("打印失败");
                   return iRet;
               }
               EndPage(hdcPrint);
               EndDoc(hdcPrint);
           }
           else
           {
               iRet= GetLastError();
               return iRet;
           }
           DeleteDC(hdcPrint);
       }
       dwError = GetLastError(); //
   }
   else
   {
       iRet = GetLastError();
       return iRet;
   }
   return 0;