Hello Shah,

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// header

void create3D();

void set3D();

IDirect3D9 *_d3d;

IDirect3DDevice9 *_d3ddev;

QSize _size; // full screen size

IDirect3DSurface9 *_imageBuf; //Source stereo image

IDirect3DSurface9 *_backBuf;

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// the code

#include

#include

#include

#include

#include

#pragma comment (lib, "d3d9.lib")

#define NVSTEREO_IMAGE_SIGNATURE 0x4433564e //NV3D

typedef struct _Nv_Stereo_Image_Header

{

unsigned int dwSignature;

unsigned int dwWidth;

unsigned int dwHeight;

unsigned int dwBPP;

unsigned int dwFlags;

} NVSTEREOIMAGEHEADER, *LPNVSTEREOIMAGEHEADER;

// ORedflags in the dwFlagsfielsof the _Nv_Stereo_Image_Headerstructure above

#define SIH_SWAP_EYES 0x00000001

#define SIH_SCALE_TO_FIT 0x00000002

// call at start to set things up

void DisplayWidget::create3D()

{

_size = QSize(1680,1050); //resolution of my Samsung 2233z

_d3d = Direct3DCreate9(D3D_SDK_VERSION); // create the Direct3D interface

D3DPRESENT_PARAMETERS d3dpp; // create a struct to hold various device information

ZeroMemory(&d3dpp, sizeof(d3dpp)); // clear out the struct for use

d3dpp.Windowed = FALSE; // program fullscreen

d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD; // discard old frames

d3dpp.hDeviceWindow = winId(); // set the window to be used by Direct3D

d3dpp.BackBufferFormat = D3DFMT_A8R8G8B8; // set the back buffer format to 32 bit // or D3DFMT_R8G8B8

d3dpp.BackBufferWidth = _size.width();

d3dpp.BackBufferHeight = _size.height();

d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_ONE;

d3dpp.BackBufferCount = 1;

// create a device class using this information and information from the d3dpp stuct

_d3d->CreateDevice(D3DADAPTER_DEFAULT,

D3DDEVTYPE_HAL,

winId(),

D3DCREATE_SOFTWARE_VERTEXPROCESSING,

&d3dpp,

&_d3ddev);

//3D VISION uses a single surface 2x images wide and image high

// create the surface

_d3ddev->CreateOffscreenPlainSurface(_size.width()*2, _size.height(), D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, &_imageBuf, NULL);

set3D();

}

// call to put 3d signature in image

void DisplayWidget::set3D()

{

// Lock the stereo image

D3DLOCKED_RECT lock;

_imageBuf->LockRect(&lock,NULL,0);

// write stereo signature in the last raw of the stereo image

LPNVSTEREOIMAGEHEADER pSIH = (LPNVSTEREOIMAGEHEADER)(((unsigned char *) lock.pBits) + (lock.Pitch * (_size.height()-1)));

// Update the signature header values

pSIH->dwSignature = NVSTEREO_IMAGE_SIGNATURE;

pSIH->dwBPP = 32;

//pSIH->dwFlags = SIH_SWAP_EYES; // Src image has left on left and right on right, thats why this flag is not needed.

pSIH->dwFlags = SIH_SCALE_TO_FIT;

pSIH->dwWidth = _size.width() *2;

pSIH->dwHeight = _size.height();

// Unlock surface

_imageBuf->UnlockRect();

}

// call in display loop

void DisplayWidget::paintEvent()

{

// clear the window to a deep blue

//_d3ddev->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 40, 100), 1.0f, 0);

_d3ddev->BeginScene(); // begins the 3D scene

// do 3D rendering on the back buffer here

RECT destRect;

destRect.left = 0;

destRect.top = 0;

destRect.bottom = _size.height();

destRect.right = _size.width();

// Get the Backbuffer then Stretch the Surface on it.

_d3ddev->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &_backBuf);

_d3ddev->StretchRect(_imageBuf, NULL, _backBuf, &destRect, D3DTEXF_NONE);

_backBuf->Release();

_d3ddev->EndScene(); // ends the 3D scene

_d3ddev->Present(NULL, NULL, NULL, NULL); // displays the created frame

}

// my images come from a camera

// _left and _right are QImages but it should be obvious what the functions do

void DisplayWidget::getImages()

{

RECT srcRect;

srcRect.left = 0;

srcRect.top = 0;

srcRect.bottom = _size.height();

srcRect.right = _size.width();

RECT destRect;

destRect.top = 0;

destRect.bottom = _size.height();

if ( isOdd() ) {

destRect.left = _size.width();

destRect.right = _size.width()*2;

// get camera data for _left here, code not shown

D3DXLoadSurfaceFromMemory(_imageBuf, NULL, &destRect,_right.bits(),D3DFMT_A8R8G8B8,_right.bytesPerLine(),NULL,&srcRect,D3DX_DEFAULT,0);

} else {

destRect.left = 0;

destRect.right = _size.width();

// get camera data for _right here, code not shown

D3DXLoadSurfaceFromMemory(_imageBuf, NULL, &destRect,_left.bits(),D3DFMT_A8R8G8B8,_left.bytesPerLine(),NULL,&srcRect,D3DX_DEFAULT,0);

}

set3D(); // add NVidia signature

}

DisplayWidget::~DisplayWidget()

{

_d3ddev->Release(); // close and release the 3D device

_d3d->Release(); // close and release Direct3D

http://sourceforge.net/projects/libnvstusb/

Thank you for the answer. I will check if it works. 

Enclosed text files may give another idea. All the best.