DirectInput Acquire fails

Graphics and GPU Programming Programming

Started by D3DXVECTOR3 October 06, 2003 07:02 PM

5 comments, last by D3DXVECTOR3 20 years, 6 months ago

147

Author

October 06, 2003 07:02 PM

I cant seem to acquire the keyboard, I followed the DirectX 9 SDK tutorial.Cant be that hard right!? DIERR_OTHERAPPHASPRIO is the result i get from Im working on this problem 3 days now and i have no clue

Every step goes fine until i have to require it.


HRESULT DirectXInput::InitializeKeyboard(HINSTANCE g_hinst, HWND hWnd)
{
	// Creating the DirextX input Object

	hr = DirectInput8Create(g_hinst, DIRECTINPUT_VERSION, IID_IDirectInput8, (void**)&g_pDI, NULL); 
	if (hr != DI_OK) 
	{ 
		// DirectInput not available; take appropriate action 

		MessageBox(hWnd,"DirectInput8Create FAILED","InitializeKeyboard()",MB_OK);
		return FALSE;
	} 

	// Creating the DirextX input keyboard

	hr = g_pDI->CreateDevice(GUID_SysKeyboard, &g_lpDIDevice, NULL); 
	if (hr != DI_OK) 
	{ 
		DI_Term();
		MessageBox(hWnd,"CreateDevice FAILED","InitializeKeyboard()",MB_OK);
		return FALSE; 
	} 

	// Setting the keyboard data format

	hr = g_lpDIDevice->SetDataFormat(&c_dfDIKeyboard); 
	if (hr != DI_OK) 
	{ 
		DI_Term();
		MessageBox(hWnd,"SetDataFormat FAILED","InitializeKeyboard()",MB_OK);
		return FALSE; 
	} 

	// Setting the Keyboard Behavior

	hr = g_lpDIDevice->SetCooperativeLevel(hWnd, DISCL_FOREGROUND | DISCL_NONEXCLUSIVE); 
	if (hr != DI_OK) 
	{ 
		DI_Term(); 
		MessageBox(hWnd,"SetCooperativeLevel FAILED","InitializeKeyboard()",MB_OK);
		return FALSE; 
	}

	// Gaining Access to the Keyboard 

	if (g_lpDIDevice)
	{
		hr = g_lpDIDevice->Acquire();
		if FAILED(hr)
		{
			switch(hr)
			{
				case DIERR_INVALIDPARAM		: MessageBox(hWnd,"Acquire FAILED : Invalid parameter ","InitializeKeyboard()",MB_OK); break;
				case DIERR_NOTINITIALIZED	: MessageBox(hWnd,"Acquire FAILED : The object has not been initialized","InitializeKeyboard()",MB_OK); break;
				case DIERR_OTHERAPPHASPRIO	: MessageBox(hWnd,"Acquire FAILED : Access Denied","InitializeKeyboard()",MB_OK); break;
				
				default : MessageBox(hWnd,"Acquire FAILED : Unknow Error","InitializeKeyboard()",MB_OK);
			}
		}
	}

	return hr;
}

[edited by - D3DXVECTOR3 on October 6, 2003 8:03:33 PM] [edited by - D3DXVECTOR3 on October 6, 2003 8:04:14 PM] [edited by - D3DXVECTOR3 on October 6, 2003 8:06:00 PM]

D3DXVECTOR3

147

Author

October 07, 2003 11:43 AM

Anyone ?:|

CommanderXXL

122

October 07, 2003 02:50 PM

I once had the same error. It is some sort of missnamed by MS.
You have to assure of some things before you call aquire:

- The Window you created and which HWND you fed to your DInputDevice create calls has to be VISIBLE and needs to be on top and activated. This is the most common problem. I myself wanted to aquire the mouse BEFORE i called ShowWindow() and UpdateWindow(). This is not good, the window has to be shown.

- If your Window goes in background (Intercept the WM_Activate)
you need to unaquire the devices and later reaquire them. This is only needed if you plan to send your app to background and use it later again.

So i suggest you look after Point1 first. Make sure the window is presented before aquireing.

Hope this helps.

----------------------------
By CommanderXXL
Commander@bloomm.de
----------------------------

---------------------------- By CommanderXXLCommander@bloomm.de----------------------------

Chris_Kynoch

122

October 08, 2003 07:26 AM

From the SDK Documentation:
DIERR_OTHERAPPHASPRIO
Another application has a higher priority level, preventing this call from succeeding. This value is equal to the E_ACCESSDENIED standard DirectInput return value. This error can be returned when an application has only foreground access to a device but is attempting to acquire the device while in the background.

Try setting the cooperative level as follows and see if that helps:
hr = g_lpDIDevice->SetCooperativeLevel(hWnd, DISCL_BACKGROUND | DISCL_NONEXCLUSIVE);

Chris.

D3DXVECTOR3

147

Author

October 11, 2003 09:11 PM

Oke i fixed the acquire thx to CommanderXXL

But i cant read any input from the kb

void DXCamera::UpdateCamera(DirectXInput DXInput, DXFont dXFont){	D3DXVECTOR3 vCross;	D3DXVec3Cross(&vCross, &(vLookatPt - vEyePt), &vUpVec);	D3DXVec3Normalize(&vStrafe,&vCross);				// Normalize the strafe vector	FLOAT fElapsedTime	= 0.05f;    FLOAT fSpeed        = 5.0f*fElapsedTime;    FLOAT fAngularSpeed = 2.0f*fElapsedTime;	hr = DXInput.GetDeviceStateKB();	if FAILED(hr) 	{ 		switch(hr)		{			case DIERR_INPUTLOST		: dXFont.DXPrintText("Access to the input device has been lost",2,400); break;			case DIERR_INVALIDPARAM		: dXFont.DXPrintText("An invalid parameter was passed", 2,400); break;			case DIERR_NOTACQUIRED		: dXFont.DXPrintText("The device is not acquired", 2,400); break;			case DIERR_NOTINITIALIZED	: dXFont.DXPrintText("The device is not initialized", 2,400); break;			case E_PENDING			: dXFont.DXPrintText("Data is not yet available", 2,400); break;						default : dXFont.DXPrintText("Oh help me God!!!", 2,400);		}				DXInput.AcquireKB();	}	else		{ 			// Strafe LEFT/RIGHT			if (KEYDOWN(DXInput.buffer, DIK_RIGHT)	|| KEYDOWN(DXInput.buffer, DIK_D));		DXStrafeCam(fSpeed);	// Strafe Right			if (KEYDOWN(DXInput.buffer, DIK_LEFT)	|| KEYDOWN(DXInput.buffer, DIK_A));		DXStrafeCam(-fSpeed);	// Strafe Left 			// Move FORWARD/BACKWARDS			if (KEYDOWN(DXInput.buffer, DIK_UP)	|| KEYDOWN(DXInput.buffer, DIK_W));		DXUpDown(fSpeed);		// Slide Up			if (KEYDOWN(DXInput.buffer, DIK_DOWN)	|| KEYDOWN(DXInput.buffer, DIK_S));		DXUpDown(-fSpeed);		// Slide Down		}}

DXInput is my input class with all DirectInput variables in it.
dXFont is is the font and code to show any messages on screen.

DXInput.GetDeviceStateKB();

looks likes this

HRESULT DirectXInput::GetDeviceStateKB(){	ZeroMemory(&buffer,256);		// Zero the buffer	hr = glpDIDevice->GetDeviceState(sizeof(buffer),(LPVOID)&buffer);	return hr;}

the buffer s a unsigned char buffer[256]
The if statements to check what key are pressed seem to be always true. I used the MS keydown macro from the tutorial

#define KEYDOWN(name, key) (name[key] & 0x80)

[edited by - D3DXVECTOR3 on October 11, 2003 10:17:42 PM]

CommanderXXL

122

October 12, 2003 06:56 AM

Maybe you try to remove the ";" at the end of the "if" statements, cause this means for the compiler to do NOTHING if the if evaluation is true and then always execute the line after the statement as it is not related to the if in any way.
This is a realy dumb error and should also produce a warning from the compiler like "empty if statement - is this intended?"
or something like this.

Hope i could help you.

---------------------------- By CommanderXXLCommander@bloomm.de----------------------------

D3DXVECTOR3

147

Author

October 12, 2003 07:43 AM

LOL i feel really stupid right now, that ; did it. I had no warnings . I feel ashamed lol

thx 1000x

edit

I know why i didnt see those warnings, the warning level was 1.

[edited by - D3DXVECTOR3 on October 12, 2003 8:49:08 AM]

DirectInput Acquire fails

This topic is closed to new replies.

Popular Topics

Recommended Tutorials

DirectInput Acquire fails

This topic is closed to new replies.

Popular Topics

Recommended Tutorials

Reticulating splines