wince 显示图片

 1 #pragma once
 2 
 3 // 做成宽松的单例
 4 class COperateImage
 5 {
 6 public:
 7     void Show(CClientDC &dc, CPoint point); // point.
 8     BOOL GetPicture(const CString &strFileName);
 9     static COperateImage *GetInstance();
10 
11 
12 protected:
13     COperateImage(void);
14 
15 private:
16     static COperateImage *m_pOI;
17     static HBITMAP m_Bitmap;
18     static CString m_strPath;
19 
20 private:
21     static CString GetPathName();
22     HBITMAP loadImageFile(const CString &strFileName);
23     HBITMAP loadBMPImage(const CString &strFileName);
24 
25 public:
26     ~COperateImage(void);
27 //public:
28 //    void MyBmp(CClientDC &dc);
29 };

View Code

  1 #include "StdAfx.h"
  2 #include "OperateImage.h"
  3 
  4 #include <initguid.h>
  5 #include <imaging.h>
  6 
  7 #pragma comment (lib,"Ole32.lib")
  8 #pragma comment (lib, "Imaging.lib")
  9 
 10 HBITMAP COperateImage::m_Bitmap = NULL;
 11 COperateImage *COperateImage::m_pOI = NULL;
 12 CString COperateImage::m_strPath = _T("");
 13 BOOL COperateImage::m_bChange = FALSE;
 14 
 15 
 16 COperateImage::COperateImage(void)
 17 {
 18 }
 19 
 20 COperateImage::~COperateImage(void)
 21 {
 22 }
 23 
 24 void COperateImage::Show(CClientDC &dc, CPoint point)
 25 {
 26     static BOOL bOnce = FALSE;
 27     if (NULL == m_Bitmap) return;
 28     if (bOnce) return;
 29     bOnce = TRUE;
 30     static CBitmap bmp1;
 31     BITMAP bm;
 32 
 33     if (m_bChange)
 34     {
 35         bmp1.Detach();
 36         bmp1.Attach(m_Bitmap);
 37         m_bChange = FALSE;
 38     }
 39     bmp1.GetBitmap(&bm);
 40 
 41     //CClientDC dc(this);
 42     CDC memDC;
 43     memDC.CreateCompatibleDC(&dc);
 44     CBitmap* pbmpOld;
 45     pbmpOld= memDC.SelectObject(&bmp1);
 46     //dc.SetStretchBltMode(COLORONCOLOR);//设置拉伸模式，否则图像会不清晰
 47     dc.StretchBlt(point.x,point.y,110/*bm.bmWidth*/,/*bm.bmHeight*/(int)(110*bm.bmHeight/bm.bmWidth),&memDC,0,0,bm.bmWidth,bm.bmHeight,SRCCOPY);//绘制图像
 48     memDC.SelectObject(pbmpOld);
 49     memDC.DeleteDC();
 50     bOnce = FALSE;
 51     //dc.DeleteDC();
 52 }
 53 
 54 BOOL COperateImage::GetPicture( const CString &strFileName )
 55 {
 56     CString strPathName = m_strPath + strFileName;
 57     int iIndex = strFileName.ReverseFind('.');
 58     if (iIndex == -1) return FALSE;
 59     CString strRight = strFileName.Right(strFileName.GetLength() - iIndex - 1).MakeUpper();
 60     DeletePicture();
 61     if (strRight == _T("JPG"))
 62         m_Bitmap = loadImageFile(strPathName);
 63     else if (strRight == _T("BMP"))
 64         m_Bitmap = loadBMPImage(strPathName);
 65     else return FALSE;
 66     
 67     if (m_Bitmap == NULL) return FALSE;
 68 
 69     m_bChange = TRUE;
 70     return TRUE;
 71 }
 72 
 73 CString COperateImage::GetPathName()
 74 {
 75     TCHAR szPath[MAX_PATH];   
 76     GetModuleFileName(NULL, szPath, MAX_PATH);
 77     CString PathName(szPath);
 78     PathName = PathName.Left(PathName.ReverseFind(_T('\')) + 1);
 79     return PathName;
 80 }
 81 
 82 HBITMAP COperateImage::loadImageFile(const CString &strFileName)
 83 {
 84     IImagingFactory *pImgFactory =NULL;  
 85     IImage *pImage =NULL;  
 86     CoInitializeEx(NULL,COINIT_MULTITHREADED); 
 87     HBITMAP hResult =0;
 88     if   (SUCCEEDED(CoCreateInstance(CLSID_ImagingFactory,  
 89         NULL,  
 90         CLSCTX_INPROC_SERVER,  
 91         IID_IImagingFactory,  
 92         (void   **)&pImgFactory)))  
 93     {  
 94         ImageInfo imageInfo;  
 95         if(SUCCEEDED(pImgFactory->CreateImageFromFile(strFileName,&pImage))  
 96             && SUCCEEDED(pImage->GetImageInfo(&imageInfo)))  
 97         {  
 98             CWindowDC dc(0);  
 99             CDC dcBitmap;  
100             dcBitmap.CreateCompatibleDC(&dc);  
101             hResult =CreateCompatibleBitmap(dc.GetSafeHdc(),imageInfo.Width,imageInfo.Height);  
102             if(hResult)
103             {  
104                 HGDIOBJ   hOldBitmap   =   dcBitmap.SelectObject(hResult);
105                 HDC safeHdc = dcBitmap.GetSafeHdc();
106                 pImage->Draw(safeHdc,CRect(0,0,imageInfo.Width,imageInfo.Height),NULL); 
107                 dcBitmap.SelectObject(hOldBitmap);
108                 DeleteObject(hOldBitmap);
109                 DeleteObject(safeHdc);
110 
111             }
112             dcBitmap.DeleteDC();
113             pImage->Release();  
114         }
115         pImgFactory->Release();  
116         CoUninitialize(); 
117     }
118     return hResult;
119 }
120 
121 COperateImage * COperateImage::GetInstance()
122 {
123     if (m_pOI == NULL)
124     {
125         m_pOI = new COperateImage();
126         m_strPath = GetPathName();
127     }
128     return m_pOI;
129 }
130 
131 //void COperateImage::MyBmp( CClientDC &dc )
132 //{
133 //    //CRect rect;   
134 //    //GetClientRect(&rect);   
135 //    CDC dcMem;   
136 //    dcMem.CreateCompatibleDC(&dc);  
137 //    CBitmap bmpBackground;   
138 //    CString strBMPPath = GetPathName() + _T("123.bmp");
139 //    bmpBackground.Attach(::SHLoadDIBitmap(strBMPPath));//动态加载
140 //    BITMAP bitmap;
141 //    bmpBackground.GetBitmap(&bitmap);
142 //    CBitmap *pbmpOld=dcMem.SelectObject(&bmpBackground);   
143 //    dc.StretchBlt(0,0,bitmap.bmWidth,bitmap.bmHeight,&dcMem,0,0,   
144 //        bitmap.bmWidth,bitmap.bmHeight,SRCCOPY);
145 //}
146 
147 HBITMAP COperateImage::loadBMPImage( const CString &strFileName )
148 {
149     HBITMAP bitmap =  ::SHLoadDIBitmap(strFileName);
150     return bitmap;
151 }
152 
153 void COperateImage::DeletePicture()
154 {
155     if (m_Bitmap) DeleteObject(m_Bitmap);
156 }

View Code

在这里通过单例的模式进行操作，因为我目前遇到的这个需求只是显示一张图片。

这里读取的是程序的当前路径的图片，用户也可以进行自己修改对应的图片路径，这里可以通过show的方式显示图片，同一张图片，在一个情况下只需加载一次即可，避免多次加载产生的效率问题。cclient dc 即图片要贴的位置，通过用户自己指定。