怎么用MFC读取图片.doc

/*CDrawBitmap封装了一些画图片的函数。调用如下：CDrawBitmap g_bmp1(D:My DocumentsMy Pictures风景图片4244123431.bmp);g_bmp1.Draw(m_hWnd); CDrawBitmap g_bmp2(D:My DocumentsMy Pictures风景图片plane.bmp);g_bmp2.DrawTransparent(m_hWnd);CDrawBitmap g_bmp3(D:My DocumentsMy Pictures风景图片jzg2.bmp);g_bmp3.DrawTransparent(m_hWnd);*/使用TransparentBlt需要添加 #pragma comment(lib,msimg32.lib)#pragma comment(lib,msimg32.lib)class CDrawBitmapprivate:HBITMAP m_bitmap;int m_bitmap_cx;int m_bitmap_cy;public:CDrawBitmap() CDrawBitmap(TCHAR * PicturePath)LoadPicture(PicturePath); CDrawBitmap(WORD ResourceID)LoadResource(ResourceID); CDrawBitmap() :DeleteObject(m_bitmap);bool LoadPicture(TCHAR * PicturePath)m_bitmap=(HBITMAP)LoadImage(NULL,/应用程序实例PicturePath,/路径IMAGE_BITMAP,0,/如果不置0,则此参数指定m_bitmap的宽(位图被拉伸)0,/如果不置0,则此参数指定m_bitmap的高(位图被拉伸)LR_LOADFROMFILE|LR_CREATEDIBSECTION|LR_DEFAULTSIZE);if (!m_bitmap)return false;BITMAP bmp; GetObject(m_bitmap,sizeof(BITMAP),(LPSTR)&bmp); m_bitmap_cx=bmp.bmWidth;m_bitmap_cy=bmp.bmHeight;return true;bool LoadResource(WORD ResourceID)m_bitmap=LoadBitmap(GetModuleHandle(NULL),MAKEINTRESOURCE (ResourceID) );if (!m_bitmap)return false;BITMAP bmp; GetObject(m_bitmap,sizeof(BITMAP),(LPSTR)&bmp); m_bitmap_cx=bmp.bmWidth;m_bitmap_cy=bmp.bmHeight;return true;void Draw(HWND hWnd=NULL,int x=0,int y=0,int width=100,int height=100)HDC hScrDC=GetDC(hWnd);/创建屏幕DCDraw(hScrDC,x,y,width,height);:ReleaseDC(hWnd,hScrDC) ;/释放屏幕DCvoid Draw(HDC hScrDC,int x=0,int y=0,int width=100,int height=100)HDC hMemDC=CreateCompatibleDC(hScrDC);/创建内存DC:SelectObject(hMemDC,m_bitmap);/把位图选进内存DCBitBlt(hScrDC,x,y,width,height,hMemDC,0,0,SRCCOPY);/内存DC映射到屏幕DC:DeleteDC(hMemDC) ;/删除内存DCvoid DrawTransparent(HWND hWnd=NULL,int x=0,int y=0)HDC hScrDC=GetDC(hWnd);/创建屏幕DCDrawTransparent(hScrDC,x,y);:ReleaseDC(hWnd,hScrDC) ;/释放屏幕DC/不进行拉伸处理，如需要，请自行修改代码TransparentBlt中的参数/使用TransparentBlt需要添加 #pragma comment(lib,msimg32.lib)void DrawTransparent(HDC hScrDC,int x=0,int y=0,UINT crTransparent=RGB(255,255,255)HDC hMemDC=CreateCompatibleDC(hScrDC);/创建内存DC:SelectObject(hMemDC,m_bitmap);/把位图选进内存DC:TransparentBlt(hScrDC,x,y,m_bitmap_cx,m_bitmap_cy,hMemDC,0,0,m_bitmap_cx,m_bitmap_cy,crTransparent);:DeleteDC(hMemDC) ;/删除内存DCvoid DrawStretch(HWND hWnd=NULL,int x=0,int y=0,int width=100,int height=100)HDC hScrDC=GetDC(hWnd);/创建屏幕DCDrawStretch(hScrDC,x,y,width,height);:ReleaseDC(hWnd,hScrDC) ;/释放屏幕DCvoid DrawStretch(HDC hScrDC=NULL,int x=0,int y=0,int width=100,int height=100)HDC hMemDC=CreateCompatibleDC(hScrDC);/创建内存DC:SelectObject(hMemDC,m_bitmap);/把位图选进内存DCSetStretchBltMode(hScrDC,COLORON