How do I load a bitmap file directly to a surface inorder to place it in the scene''s background ?

this code is not mine- i just changed it a bit
hope the author wont mind
enjoy


/* code by Lar Mader follows: three functions
* Function to create an offscreen surface and load a bitmap from
* disk into it. The szBitmap field is the filename of the Bitmap.
*/
IDirectDrawSurface * DDLoadBitmap(IDirectDraw *pdd, LPCSTR szBitmap)
{
HBITMAP hbm;
BITMAP bm;
IDirectDrawSurface *pdds;

// LoadImage has some added functionality in Windows 95 that allows
// you to load a bitmap from a file on disk.
hbm = (HBITMAP)LoadImage(NULL, szBitmap, IMAGE_BITMAP, 0, 0,
LR_LOADFROMFILE/LR_CREATEDIBSECTION);

if (hbm == NULL)
return NULL;

GetObject(hbm, sizeof(bm), &bm); // get size of bitmap

/*
* create a DirectDrawSurface for this bitmap
* source to function CreateOffScreenSurface() follows immediately
*/

pdds = CreateOffScreenSurface(pdd, bm.bmWidth, bm.bmHeight);
if (pdds) {
DDCopyBitmap(pdds, hbm, bm.bmWidth, bm.bmHeight);
}

DeleteObject(hbm);

return pdds;
}

/*
* Creates a DirectDraw Surface of a specified size
* This surface will be in video memory if enough is
* available, otherwise it will be created in system memory
*/
IDirectDrawSurface * CreateOffScreenSurface(IDirectDraw *pdd, int dx, int dy)
{
DDSURFACEDESC ddsd;
IDirectDrawSurface *pdds;

//
// create a DirectDrawSurface for this bitmap
//
ZeroMemory(&ddsd, sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS / DDSD_HEIGHT /DDSD_WIDTH;
ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN;
ddsd.dwWidth = dx;
ddsd.dwHeight = dy;

if (pdd->CreateSurface(&ddsd, &pdds, NULL) != DD_OK)
{
return NULL;
} else {
return pdds;
}
}

/*
* This function copies a previously loaded bitmap into a DirectDraw surface.
* Notice that we can obtain a GDI style device context for a
* DirectDraw surface, with which to BitBlt the bitmap into the
* surface.
*/
HRESULT DDCopyBitmap(IDirectDrawSurface *pdds, HBITMAP hbm, int dx, int dy)
{
HDC hdcImage;
HDC hdc;
HRESULT hr;
HBITMAP hbmOld;

//
// select bitmap into a memoryDC so we can use it.
//
hdcImage = CreateCompatibleDC(NULL);
hbmOld = (HBITMAP)SelectObject(hdcImage, hbm);

if ((hr = pdds->GetDC(&hdc)) == DD_OK)
{
BitBlt(hdc, 0, 0, dx, dy, hdcImage, 0, 0, SRCCOPY);
pdds->ReleaseDC(hdc);
}

SelectObject(hdcImage, hbmOld);
DeleteDC(hdcImage);

return hr;
}

this code is not mine- i just changed it a bit
hope the author wont mind
enjoy


/* code by Lar Mader follows: three functions
* Function to create an offscreen surface and load a bitmap from
* disk into it. The szBitmap field is the filename of the Bitmap.
*/
IDirectDrawSurface * DDLoadBitmap(IDirectDraw *pdd, LPCSTR szBitmap)
{
HBITMAP hbm;
BITMAP bm;
IDirectDrawSurface *pdds;

// LoadImage has some added functionality in Windows 95 that allows
// you to load a bitmap from a file on disk.
hbm = (HBITMAP)LoadImage(NULL, szBitmap, IMAGE_BITMAP, 0, 0,
LR_LOADFROMFILE/LR_CREATEDIBSECTION);

if (hbm == NULL)
return NULL;

GetObject(hbm, sizeof(bm), &bm); // get size of bitmap

/*
* create a DirectDrawSurface for this bitmap
* source to function CreateOffScreenSurface() follows immediately
*/

pdds = CreateOffScreenSurface(pdd, bm.bmWidth, bm.bmHeight);
if (pdds) {
DDCopyBitmap(pdds, hbm, bm.bmWidth, bm.bmHeight);
}

DeleteObject(hbm);

return pdds;
}

/*
* Creates a DirectDraw Surface of a specified size
* This surface will be in video memory if enough is
* available, otherwise it will be created in system memory
*/
IDirectDrawSurface * CreateOffScreenSurface(IDirectDraw *pdd, int dx, int dy)
{
DDSURFACEDESC ddsd;
IDirectDrawSurface *pdds;

//
// create a DirectDrawSurface for this bitmap
//
ZeroMemory(&ddsd, sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS / DDSD_HEIGHT /DDSD_WIDTH;
ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN;
ddsd.dwWidth = dx;
ddsd.dwHeight = dy;

if (pdd->CreateSurface(&ddsd, &pdds, NULL) != DD_OK)
{
return NULL;
} else {
return pdds;
}
}

/*
* This function copies a previously loaded bitmap into a DirectDraw surface.
* Notice that we can obtain a GDI style device context for a
* DirectDraw surface, with which to BitBlt the bitmap into the
* surface.
*/
HRESULT DDCopyBitmap(IDirectDrawSurface *pdds, HBITMAP hbm, int dx, int dy)
{
HDC hdcImage;
HDC hdc;
HRESULT hr;
HBITMAP hbmOld;

//
// select bitmap into a memoryDC so we can use it.
//
hdcImage = CreateCompatibleDC(NULL);
hbmOld = (HBITMAP)SelectObject(hdcImage, hbm);

if ((hr = pdds->GetDC(&hdc)) == DD_OK)
{
BitBlt(hdc, 0, 0, dx, dy, hdcImage, 0, 0, SRCCOPY);
pdds->ReleaseDC(hdc);
}

SelectObject(hdcImage, hbmOld);
DeleteDC(hdcImage);

return hr;
}

thanks, I''ll try it.