genesis-3d_engine/Engine/addons/input/win32/win32inputhardwaresource.cc

/****************************************************************************
Copyright (c) 2011-2013,WebJet Business Division,CYOU

http://www.genesis-3d.com.cn

Permission is hereby granted, free of charge, to any person obtaining a copy
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#if WIN32

#include "input/input_stdneb.h"
#include "input/win32/win32inputhardwaresource.h"
#include "input/win32/win32inputserver.h"

namespace Win32Input
{
	__ImplementClass(Win32Input::Win32InputHardwareSource, 'WHIS', Input::InputSource );

	//------------------------------------------------------------------------
	Win32InputHardwareSource::Win32InputHardwareSource():
		mDi8(0),
		mDi8Mouse(0)
	{

	}
	//------------------------------------------------------------------------
	Win32InputHardwareSource::~Win32InputHardwareSource()
	{

	}
	//------------------------------------------------------------------------
	void
	Win32InputHardwareSource::Open(const GPtr<Input::InputServerBase>& inputServer)
	{
		_OpenDInputMouse();
		Super::Open(inputServer);
	}
	//------------------------------------------------------------------------
	// @ InputSource::Close()
	void 
	Win32InputHardwareSource::Close()
	{
		_CloseDInputMouse();
		Super::Close();
	}
	//------------------------------------------------------------------------
	void 
	Win32InputHardwareSource::BeginFrame()
	{
		Super::BeginFrame();
		_ReadDInputMouse();
	}
	//------------------------------------------------------------------------------
	/**    
		This intitialies a DirectInput mouse device in order to track
		raw mouse movement (WM mouse events stop at the screen borders).
	*/
	bool
	Win32InputHardwareSource::_OpenDInputMouse()
	{
		n_assert(0 == this->mDi8);
		n_assert(0 == this->mDi8Mouse);
		HRESULT hr;

		// create DirectInput interface
		hr = DirectInput8Create(GetModuleHandle(NULL), DIRECTINPUT_VERSION, IID_IDirectInput8, (LPVOID*)&(this->mDi8), NULL);
		n_assert(SUCCEEDED(hr));
		n_assert(0 != this->mDi8);

		// create a DirectInput mouse device
		hr = this->mDi8->CreateDevice(GUID_SysMouse, &(this->mDi8Mouse), NULL);
		n_assert(SUCCEEDED(hr));
		n_assert(0 != this->mDi8Mouse);

		// tell DInput what we're interested in
		hr = this->mDi8Mouse->SetDataFormat(&c_dfDIMouse2);
		n_assert(SUCCEEDED(hr));

		// set the cooperative level of the device, we're friendly
		// note: use Win32's FindWindow() to find our top level window because 
		// the DisplayDevice may be running in a different thread
		HWND hWnd = FindWindowA(NEBULA3_WINDOW_CLASS, NULL);
		if (0 != hWnd)
		{
			hr = this->mDi8Mouse->SetCooperativeLevel(hWnd, DISCL_FOREGROUND | DISCL_NOWINKEY | DISCL_NONEXCLUSIVE);
			n_assert(SUCCEEDED(hr));
		}

		// set buffer size and relative axis mode on the mouse
		DIPROPDWORD dipdw;
		dipdw.diph.dwSize       = sizeof(DIPROPDWORD);
		dipdw.diph.dwHeaderSize = sizeof(DIPROPHEADER);
		dipdw.diph.dwObj        = 0;
		dipdw.diph.dwHow        = DIPH_DEVICE;

		dipdw.dwData = DInputMouseBufferSize;
		hr = this->mDi8Mouse->SetProperty(DIPROP_BUFFERSIZE, &dipdw.diph);
		n_assert(SUCCEEDED(hr));
		dipdw.dwData = DIPROPAXISMODE_REL;
		hr = this->mDi8Mouse->SetProperty(DIPROP_AXISMODE, &dipdw.diph);
		n_assert(SUCCEEDED(hr));

		// aquire the mouse
		this->mDi8Mouse->Acquire();

		return true;
	}

	//------------------------------------------------------------------------------
	/**    
		Close the DirectInput mouse and DirectInput.
	*/
	void
	Win32InputHardwareSource::_CloseDInputMouse()
	{
		n_assert(0 != this->mDi8);
		n_assert(0 != this->mDi8Mouse);
		this->mDi8Mouse->Unacquire();
		this->mDi8Mouse->Release();
		this->mDi8Mouse = 0;
		this->mDi8->Release();
		this->mDi8 = 0;
	}

	//------------------------------------------------------------------------------
	/**    
		Read data from the DirectInput mouse (relative mouse movement
		since the last frame).
	*/
	void
	Win32InputHardwareSource::_ReadDInputMouse()
	{
		n_assert(0 != this->mDi8Mouse);
		DIDEVICEOBJECTDATA didod[DInputMouseBufferSize];
		HRESULT hr;
	    
		Math::float2 mouseMovement;
		mouseMovement.set(0.0f, 0.0f);

		// read buffered mouse data
		DWORD inOutNumElements = DInputMouseBufferSize;
		hr = this->mDi8Mouse->GetDeviceData(sizeof(DIDEVICEOBJECTDATA), didod, &inOutNumElements, 0);
		if (DI_OK != hr)
		{
			hr = this->mDi8Mouse->Acquire();
		}
		else
		{
			IndexT i;
			for (i = 0; i < (SizeT)inOutNumElements; i++)
			{
				switch (didod[i].dwOfs)
				{
					case DIMOFS_X:
						mouseMovement.x() += float(int(didod[i].dwData)) * 0.1f;
						break;

					case DIMOFS_Y:
						mouseMovement.y() += float(int(didod[i].dwData)) * 0.1f;
						break;
				}
			}

			n_assert(mInputServer.isvalid() && mInputServer->GetRtti()->IsDerivedFrom( Win32InputServer::RTTI ) );
			GPtr<Win32InputServer> win32InputServer = mInputServer.downcast<Win32InputServer>();
			n_assert( win32InputServer.isvalid() );
			win32InputServer->SetMouseMovement( mouseMovement );
		}
	}


}

#endif