Question

如何从Gdiplus：Image中得到位图的HBITMAP-CSDN论坛

Answer 1

先转成BMP再取得HBITMAP
Image image(L"E:\\temp.png");

CLSID clsid;
GetEncoderClsid(L"image/bmp", &clsid);

image.Save(L"E:\\temp.bmp", &clsid, NULL);
Bitmap bmp(L"E:\\temp.bmp");
HBITMAP hBmp;

Color cr;
bmp.GetHBITMAP(&cr , hBmp);

...

int GetEncoderClsid(const WCHAR *format, CLSID *pClsid)
{
UINT num = 0; // number of image encoders
UINT size = 0; // size of the image encoder array in bytes

ImageCodecInfo* pImageCodecInfo = NULL;

GetImageEncodersSize(&num, &size);
if(size == 0)
return -1; // Failure

pImageCodecInfo = (ImageCodecInfo*)(malloc(size));
if(pImageCodecInfo == NULL)
return -1; // Failure

GetImageEncoders(num, size, pImageCodecInfo);

for(UINT j = 0; j < num; ++j)
{
if( wcscmp(pImageCodecInfo[j].MimeType, format) == 0 )
{
*pClsid = pImageCodecInfo[j].Clsid;
free(pImageCodecInfo);
return j; // Success
}
}

free(pImageCodecInfo);
return -1; // Failure

}

时间问题，未经测试