Modifying a DXimagelist bitmap

[Damot]

No it is not possible, you can only create new surfaces during or after the onInitialize event.

Thanks for your help, but can you help me with a new problem?

When I change from windowed mode to fullscreen (during the game) or use ALT-TAB to switch applications, the surface seems to disappear completely.

What's the correct way to handle that?

TIA!

[Traveler]

Alt tabbing has always been a bit of a pain in DelphiX. It is not impossible though. In one of the spritedemos (shootinggame iirc) there's samplecode of how to switch to fullscreen and/or return again.
If I'm not mistaken it stops the timer, does a (re)storewindow call, sets fullscreenproperty and starts the timer again.

Hope this works for you

[sam.chung]

This is code I used to deal with it. I don't know if it is well, but it work

var
bIniOnStart: Boolean;

procedure TFmMain.FormCreate(Sender: TObject);
begin
bIniOnStart := True;
end;

procedure TFmMain.DXTimer1Deactivate(Sender: TObject);
begin
bIniOnStart := False;
end;

procedure TFmMain.DXTimer1Activate(Sender: TObject);
begin
if not bIniOnStart then begin
DXDraw1.Initialize;
end;
end;

[Damot]

Alt tabbing has always been a bit of a pain in DelphiX. It is not impossible though. In one of the spritedemos (shootinggame iirc) there's samplecode of how to switch to fullscreen and/or return again.
If I'm not mistaken it stops the timer, does a (re)storewindow call, sets fullscreenproperty and starts the timer again.

Hope this works for you

Thanks. I didn't make the problem very clear. I've managed to get the windowed/fullscreen changing okay but the contents of the radar surface (like in your example) seemed to disappear.

So I had to put a new "radarImg.LoadFromGraphic..." into the dxdraw.onsurfacerestore

Not sure if that's the correct thing to do but it works!