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Updating the screen when the main window is moved.


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#1 SikCiv   Members   -  Reputation: 122

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Posted 22 December 1999 - 06:20 AM

With many DX Based games, the still image in the main window (primary surface) disappears into black when the game window is moved out of the screen and back in.

Ive noticed Mortal Kombat 4 updates the image where black usually appears.done?

I tried blitting the screen when WM_PAINT is called, but it seems if I put a function call in WM_PAINT the app causes a fatal error

Anyone know how it is done?


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#2 Machaira   Moderators   -  Reputation: 1028

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Posted 21 December 1999 - 06:35 PM

Try putting a call to your blitting function in the loop in your WinMain:

code:

while (TRUE)
{
if (PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE))
{
if (!GetMessage(&msg, NULL, 0, 0))
return msg.wParam;
TranslateMessage(&msg);
DispatchMessage(&msg);
}
else if (g_bActive)
{
UpdateFrame(hWnd);
}
else
{
// Make sure we go to sleep if we have nothing else to do
WaitMessage();
}

This is from the Stretch DX7 example.

------------------
Breakaway Games


#3 CJ   Members   -  Reputation: 122

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Posted 22 December 1999 - 06:20 AM

It's also the usual way to do it as far as I know. Be sure to use WM_ACTIVATEAPP




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