QImage from HBITMAP

Question

In my windows-only program, I use a third-party library, which returns a HBITMAP.

Is there a way to initialize a QImage from its contents, i.e. to convert it to a QImage?

Answer 1

This is the way to do it for Qt 4 (QtGui):

QImage image(QPixmap::fromWinHBITMAP(hBitmap).toImage());

This is the way to do it for Qt 5 (QtWinExtras):

QPixmap pixmap = QtWin::fromHBITMAP(hBitmap);
QImage image = pixmap.toImage();

// or

QtWin::imageFromHBITMAP(hdc, hBitmap, width, height)

Answer 2

OK, this seems to work for me:

QImage image(QPixmap::fromWinHBITMAP(hBitmap).toImage());

Answer 3

Qt5 without Extras: Put before your code

#include <QPixmap>
Q_GUI_EXPORT QPixmap qt_pixmapFromWinHBITMAP(HBITMAP bitmap, int hbitmapFormat=0);

and in your function, for example

QPixmap pixmap = qt_pixmapFromWinHBITMAP(LoadBitmap(uiID));

Cheers