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[ask] Execute external program

Started by mpek Feb 23, 2007 at 2:12 AM 1 reply 750+ views

Original Post

Feb 23, 2007 at 2:12 AM

hello, currently i'm working on a game project that use directx and win32 api. here is the situation: i need to call an external program from my game ( a touchscreen calibrate utility ). i called the touchscreen calibrate program using win32 CreateProcess(). if i'm running my game in a windowed mode, it works ( calling the calibrate utility and then back into the game) but if i'm running my game in fullscreen mode, it doesn't work (calling the calibrate utility, and if i closed the app it won't go back to the game & shown DDerror surface lost)



DWORD WINAPI monitor_extprg_proc(LPVOID input){ 
     ...
     int retVal; 
     retVal = input->agent->ExecuteProcess(program,param);
     ...
} 
 
void Class::OnAction(Event event){ 
     ... 
     monitor_extprg_handle = CreateThread(NULL,0,monitor_extprg_proc,input,0,&id); 
     ... 
}

ExecuteProcess is an encapsulation of win32 api CreateProcess() i have an opinion maybe this is the same situation like alt+tab problem. CMIIW can someone give some sugestion ? thx before

IndyJones

Feb 23, 2007 at 4:02 AM

Your device gets lost if your D3D fullscreen application looses its focus. This means you will have to release all D3DPOOL_DEFAULT resources, reset the device and recreate your resources. Usually your D3D rendering loop should look something like this:

HRESULT hr;if(SUCCEEDED(hr = d3dDevice->TestCooperativeLevel())){   // render your scene}else{   if(hr == D3DERR_DEVICELOST)   {       .. // release all D3DPOOL_DEFAULT resources like index/vertex buffers, textures, etc.       d3dDevice->Reset(&d3dPP); // reset needs presentation parameters       .. // recreate all D3DPOOL_DEFAULT resources   }}

Some of the D3DX interfaces also offer the OnLostDevice and OnResetDevice methods that do the release/recreate work for you.

HTH

mpek

Author

mpek

Feb 25, 2007 at 8:53 PM

@indy

errr, my engine still using LPDIRECTDRAWSURFACE3 to blit 2d.

i already check the DDERR_SURFACELOST, and i already changed the blit Function

res = m_pDDs->Blit(...);if( res == DDERR_SURFACELOST ){	m_pDDS->Restore();...

now after i called the external app, it can switch back to my game (no error) but it doesn't show anything just a black screen. can someone help me?

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