一、 实现代码
void
DrawImage(HDC hdc,RECT
&
rc,UINT nIDResource,CString lpType)
{
HINSTANCE hInst = AfxGetResourceHandle();
HRSRC hRsrc = ::FindResource(hInst, MAKEINTRESOURCE(nIDResource), lpType);
if ( ! hRsrc)
return ;
// 资源大小
DWORD len = SizeofResource(hInst, hRsrc);
// 转换图片资源为字节数组
BYTE * lpRsrc = (BYTE * )LoadResource(hInst, hRsrc);
if ( ! lpRsrc)
return ;
IImagingFactory * pImgFactory = NULL;
IImage * pImage = NULL;
CoInitializeEx(NULL, COINIT_MULTITHREADED);
if (SUCCEEDED(CoCreateInstance (CLSID_ImagingFactory,
NULL,
CLSCTX_INPROC_SERVER,
IID_IImagingFactory,
( void ** ) & pImgFactory)))
{
if (SUCCEEDED(pImgFactory -> CreateImageFromBuffer(lpRsrc,len,BufferDisposalFlagNone, & pImage)))
{
pImage -> Draw(hdc, & rc, NULL);
pImage -> Release();
}
pImgFactory -> Release();
}
CoUninitialize();
// 释放资源
FreeResource(hRsrc);
}
{
HINSTANCE hInst = AfxGetResourceHandle();
HRSRC hRsrc = ::FindResource(hInst, MAKEINTRESOURCE(nIDResource), lpType);
if ( ! hRsrc)
return ;
// 资源大小
DWORD len = SizeofResource(hInst, hRsrc);
// 转换图片资源为字节数组
BYTE * lpRsrc = (BYTE * )LoadResource(hInst, hRsrc);
if ( ! lpRsrc)
return ;
IImagingFactory * pImgFactory = NULL;
IImage * pImage = NULL;
CoInitializeEx(NULL, COINIT_MULTITHREADED);
if (SUCCEEDED(CoCreateInstance (CLSID_ImagingFactory,
NULL,
CLSCTX_INPROC_SERVER,
IID_IImagingFactory,
( void ** ) & pImgFactory)))
{
if (SUCCEEDED(pImgFactory -> CreateImageFromBuffer(lpRsrc,len,BufferDisposalFlagNone, & pImage)))
{
pImage -> Draw(hdc, & rc, NULL);
pImage -> Release();
}
pImgFactory -> Release();
}
CoUninitialize();
// 释放资源
FreeResource(hRsrc);
}
代码说明：
a). 关键部分为将LoadResource转换成BYTE*以及CreateImageFromBuffer方法。
本文转自博客园农民伯伯的博客，原文链接：[WM C++]从资源文件中加载显示png/jpg图片，如需转载请自行联系原博主。
