Hi... I posted a question a little earlier, but my problem wasn''t what I thought then. It is as follows... My problem arises when I do a lot of blits ("DDSurface->Blt()"). Windows seems to be terrible slowed down by this. I can''t se why because my app are running like hell (about 300-1300 FPS). Is it that my app steals all CPU time or what???? Are there some message I don''t handle or something. It dosen''t matter if I run my program in fullscreen or windowed mode. Please help, I don''t understand this... // Javelin -- Why do something today when you can do it tomorrow... --

Do you remember to put a DoEvents command in after your rendering?

what does your main game loop look like??

ie

  ZeroMemory( &msg, sizeof(msg) );while( msg.message != WM_QUIT ){    if( PeekMessage( &msg, NULL, 0U, 0U, PM_REMOVE ) )    {      TranslateMessage( &msg );      DispatchMessage( &msg );    }    else    {      if(m_bIsActive){         // Update players         updateGame(1.0f);         // render the scene         renderGame();      }    }}  

you NEED to be nice to windows and share execution time with it, otherwise very strange things begin to happen...(ie. Windows gets MAD)

Thanks for your answers, but I think I should have said that I'm using DirctDraw7. I'm also using Visual C++ and the standard Windows API (not MFC).

I looked up the DoEvent thing, but does it exist in C++? I noticed that when I add a simple wait in my code everything runs smooth, but it can't be ritght that I should have to add a wait in my main loop to make my app nice...

My main loop

while(true)
{
while(clock() [less than] last+1);
last=clock();

scrn.PutGfx(splash); // Put something on my surface
scrn.Flip(); // Make a blit (not a flip)

if( PeekMessage( &msg, NULL, 0, 0, PM_NOREMOVE ) )
{
if( 0 == GetMessage(&msg, NULL, 0, 0 ) )
return (int)msg.wParam;

if( 0 == TranslateAccelerator( hWnd, hAccel, &msg ) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
}
else
WaitMessage();
}

Hmmm... it seems that you can't type every character in here like the 'less than' sign.

I would be happy for some more answers...

// Javelin
-- Why do something today when you can do it tomorrow... --

Edited by - Javelin on January 3, 2002 9:05:37 AM

Edited by - Javelin on January 3, 2002 9:09:12 AM

DoEvents is a VB command that I''m guessing is equivalent to:
if( GetMessage(...) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
Just your typical message processing loop.

-----------------------------
The sad thing about artificial intelligence is that it lacks artifice and therefore intelligence.

quote:Original post by Javelin
Thanks for your answers, but I think I should have said that I''m using DirctDraw7. I''m also using Visual C++ and the standard Windows API (not MFC).

I looked up the DoEvent thing, but does it exist in C++? I noticed that when I add a simple wait in my code everything runs smooth, but it can''t be ritght that I should have to add a wait in my main loop to make my app nice...

My main loop

while(true)
{
while(clock() [less than] last+1);
last=clock();

scrn.PutGfx(splash); // Put something on my surface
scrn.Flip(); // Make a blit (not a flip)

if( PeekMessage( &msg, NULL, 0, 0, PM_NOREMOVE ) )
{
if( 0 == GetMessage(&msg, NULL, 0, 0 ) )
return (int)msg.wParam;

if( 0 == TranslateAccelerator( hWnd, hAccel, &msg ) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
}
else
WaitMessage();
}

Hmmm... it seems that you can''t type every character in here like the ''less than'' sign.

I would be happy for some more answers...

// Javelin
-- Why do something today when you can do it tomorrow... --

Edited by - Javelin on January 3, 2002 9:05:37 AM

Edited by - Javelin on January 3, 2002 9:09:12 AM

NOt sure if that would solve your problem but instead of:

if( PeekMessage( &msg, NULL, 0, 0, PM_NOREMOVE ) )

you should do:

while( PeekMessage( &msg, NULL, 0, 0, PM_NOREMOVE ) )

if makes sure that all messages are processed before continuing... Again, I cna''t say for sure if that''s the problem but I just thought I''d point that out...



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