/**********************
picName = 文件名
dc = 目标设备句柄
w, h = 目标设备句柄的 长和宽
**********************/
BOOL LoadPic(const char *picName, CDC &dc, DWORD w, DWORD h)
{
IPicture *pPic;
IStream *pStm;
CFileStatus fstatus;
CFile file;
LONG cb;
if (file.Open(picName,CFile::modeRead)&&
file.GetStatus(picName, fstatus)&&
((cb = fstatus.m_size) != -1))
{
HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, cb);
LPVOID pvData = NULL;
if (hGlobal != NULL)
{
if ((pvData = GlobalLock(hGlobal)) != NULL)
{
file.ReadHuge(pvData, cb);
GlobalUnlock(hGlobal);
CreateStreamOnHGlobal(hGlobal, TRUE, &pStm);
if(SUCCEEDED(OleLoadPicture(pStm,fstatus.m_size,TRUE,IID_IPicture,(LPVOID*)&pPic)))
{
OLE_XSIZE_HIMETRIC hmWidth;
OLE_YSIZE_HIMETRIC hmHeight;
pPic->get_Width(&hmWidth);
pPic->get_Height(&hmHeight);
DWORD fX, fY; fX = (DWORD)((double)dc.GetDeviceCaps(HORZRES)*(double)hmWidth/
((double)dc.GetDeviceCaps(HORZSIZE)*100.0) * 1.512f);
fY = (DWORD)((double)dc.GetDeviceCaps(VERTRES)*(double)hmHeight/
((double)dc.GetDeviceCaps(VERTSIZE)*100.0) * 1.512f); DWORD top=0, left=0;
if (w!=0 && h!=0)
{
if (fX >= w)
fX = w;
else
left = (w-fX)/2;
if (fY >= h)
fY = h;
else
top = (h-fY)/2;
}
if(FAILED(pPic->Render(dc,left,top,fX,fY,0,hmHeight,hmWidth,-hmHeight,NULL)))
{
#ifdef _DEBUG
TRACE("\nFailed To Render The picture!");
#endif
return FALSE;
}
pPic->Release();
}
else
{
#ifdef _DEBUG
TRACE("\nError Loading Picture From Stream!");
#endif
return FALSE;
}
}
}
}
else
{
#ifdef _DEBUG
TRACE("\nCan't Open Image File!");
#endif
return FALSE;
} return TRUE;
}
使用范例:
CRect rect;
m_hPicView.GetWindowRect(&rect);
CDC *pDC=m_hPicView.GetDC();
if (LoadPic(fn, *pDC, m_Rect.Width(), m_Rect.Height())==FALSE)
picName = 文件名
dc = 目标设备句柄
w, h = 目标设备句柄的 长和宽
**********************/
BOOL LoadPic(const char *picName, CDC &dc, DWORD w, DWORD h)
{
IPicture *pPic;
IStream *pStm;
CFileStatus fstatus;
CFile file;
LONG cb;
if (file.Open(picName,CFile::modeRead)&&
file.GetStatus(picName, fstatus)&&
((cb = fstatus.m_size) != -1))
{
HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, cb);
LPVOID pvData = NULL;
if (hGlobal != NULL)
{
if ((pvData = GlobalLock(hGlobal)) != NULL)
{
file.ReadHuge(pvData, cb);
GlobalUnlock(hGlobal);
CreateStreamOnHGlobal(hGlobal, TRUE, &pStm);
if(SUCCEEDED(OleLoadPicture(pStm,fstatus.m_size,TRUE,IID_IPicture,(LPVOID*)&pPic)))
{
OLE_XSIZE_HIMETRIC hmWidth;
OLE_YSIZE_HIMETRIC hmHeight;
pPic->get_Width(&hmWidth);
pPic->get_Height(&hmHeight);
DWORD fX, fY; fX = (DWORD)((double)dc.GetDeviceCaps(HORZRES)*(double)hmWidth/
((double)dc.GetDeviceCaps(HORZSIZE)*100.0) * 1.512f);
fY = (DWORD)((double)dc.GetDeviceCaps(VERTRES)*(double)hmHeight/
((double)dc.GetDeviceCaps(VERTSIZE)*100.0) * 1.512f); DWORD top=0, left=0;
if (w!=0 && h!=0)
{
if (fX >= w)
fX = w;
else
left = (w-fX)/2;
if (fY >= h)
fY = h;
else
top = (h-fY)/2;
}
if(FAILED(pPic->Render(dc,left,top,fX,fY,0,hmHeight,hmWidth,-hmHeight,NULL)))
{
#ifdef _DEBUG
TRACE("\nFailed To Render The picture!");
#endif
return FALSE;
}
pPic->Release();
}
else
{
#ifdef _DEBUG
TRACE("\nError Loading Picture From Stream!");
#endif
return FALSE;
}
}
}
}
else
{
#ifdef _DEBUG
TRACE("\nCan't Open Image File!");
#endif
return FALSE;
} return TRUE;
}
使用范例:
CRect rect;
m_hPicView.GetWindowRect(&rect);
CDC *pDC=m_hPicView.GetDC();
if (LoadPic(fn, *pDC, m_Rect.Width(), m_Rect.Height())==FALSE)
你想能够在DC上操作的都可以。
我好可怜牙…
leky2000(懒客),你还我分来-------------------------------------------不过,再安慰安慰我就算了!!!!!