GDI+ Image通过资源ID构建对象

BOOL CSmalltmpdemoDlg::ImageFromIDResource(UINT nID, LPCTSTR sTR, Image * & pImg) { HINSTANCE hInst = AfxGetResourceHandle(); HRSRC hRsrc = ::FindResource (hInst,MAKEINTRESOURCE(nID),sTR); // type if (!hRsrc) return FALSE; // load resource into memory DWORD len = SizeofResource(hInst, hRsrc); BYTE* lpRsrc = (BYTE*)LoadResource(hInst, hRsrc); if (!lpRsrc) return FALSE; // Allocate global memory on which to create stream HGLOBAL m_hMem = GlobalAlloc(GMEM_FIXED, len); BYTE* pmem = (BYTE*)GlobalLock(m_hMem); memcpy(pmem,lpRsrc,len); IStream* pstm; CreateStreamOnHGlobal(m_hMem,FALSE,&pstm); // load from stream pImg=Gdiplus::Image::FromStream(pstm); // free/release stuff GlobalUnlock(m_hMem); pstm->Release(); FreeResource(lpRsrc); return TRUE; }

 

调用方式：

 

Image * pImage = NULL;

ImageFromIDResource(IDR_PNG_NO_PIC, L"png", pImage);

delete pImage;

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Image * pImage = NULL;

ImageFromIDResource(IDR_PNG_NO_PIC, L"jpg", pImage);

delete pImage;

//////////////////////////////////////////////////////////////////////////

 

Image * pImage = NULL;

ImageFromIDResource(IDR_PNG_NO_PIC, L"bitmap", pImage);

delete pImage;

//////////////////////////////////////////////////////////////////////////

其中的 L"png"， L"jpg"， L"bitmap"为导入到vc资源的类别，并且不区分大小写。