GDI+ Image通过资源ID构建对象

从资源加载图像

最新推荐文章于 2025-10-09 10:39:19 发布

转载最新推荐文章于 2025-10-09 10:39:19 发布 · 4.2k 阅读

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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;

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

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;