blit and BufferedPaintDC

[Declan McMullen]

Ive tried turning off double buffering and I still get an entitrely black
bitmap.
If i set the bitmap to match another bitmap its fine, so It seems the blit
definitely isnt
copying the content of the dc to the memory dc

Any ideas ?

On Sun, Apr 20, 2008 at 4:42 PM, Declan McMullen <declan.mcmullen at gmail.com>
wrote:

>
> Is it possible to use blit with a double buffered paint dc ?I have the
> following function
>
>
> wxBitmap WorkspaceView::getScreenShot(wxDC& dc)
>
> {
>
> wxSize screenSize =3D dc.GetSize();
>
> wxBitmap screenBitmap(screenSize.GetWidth(), screenSize.GetHeight());
>
> wxMemoryDC memDC;
>
> memDC.SelectObject(screenBitmap);
>
> memDC.Blit(0, 0, screenSize.GetWidth(), screenSize.GetHeight(), &dc, 0,
> 0);
>
> memDC.SelectObject(wxNullBitmap);
>
> return screenBitmap;
>
> }
>
>
>
> What I wanted to do with it was make a bitmap I could use for printing,
> i.e just put everything
>
> thats on the screen into a bitmap, send that image to my printout object
> and print it.
>
> All I'm getting though is a completely black image and I'm thinking its
> due to my double buffering ?
>
>
> Is it possible for me to get the contents of the buffer itself and use
> that ?
>
>
>
> --
> http://www.computing.dcu.ie/~dmcmullen<http://www.computing.dcu.ie/%7Edmc=
mullen>
> declan.mcmullen at computing.dcu.ie
> School of Computing
> Postgrad Bay A
>



-- =

http://www.computing.dcu.ie/~dmcmullen
declan.mcmullen at computing.dcu.ie
School of Computing
Postgrad Bay A
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.wxwidgets.org/pipermail/wx-users/attachments/20080421/3a2=
b26d4/attachment.htm