如何使用GDI+在内存中缩放bmp并保存

[fenex]

如1024×768的转成800×600的。

[DentistryDoctor]

http://www.codeguru.com/Cpp/G-M/bitmap/specialeffects/article.php/c4897/

[fenex]

upupup

[Gozhhu]

BSTR bstrfromfile = fromfile.AllocSysString();
Image oriimage(bstrfromfile);
::SysFreeString(bstrfromfile);

Image * image = oriimage.GetThumbnailImage(800, 600, NULL, NULL);

CLSID clsid;
GetEncoderClsid(L"image/jpeg", &clsid);
tofile.Replace('.','_');
tofile += ".jpg";

BSTR bstrtofile = tofile.AllocSysString();
Status stat = image->Save(bstrtofile, &clsid, NULL);
::SysFreeString(bstrtofile);

delete image;

if(stat == Ok)
return TRUE;
else
return FALSE;

[Gozhhu]

主要是用GetThumbnailImage