Loading and Manipulating Bitmaps

[msia81]

Hi,

Is there an easy way to load bitmaps from file and manipulate them using Visual C++? I've tried using LoadBitmap and LoadImage but am not having any luck. I'd like to be able to just read the bitmap from somewhere on my computer and then read its pixel information. Any suggestions?

 

[Miros]

I'm not at the 'puter with Visual Studio installed, so I can't check this... but try reading the whole file into an array of bytes, then cast that to a bitmap.

 

[msia81]

Yeah, that's what I ended up doing. Was a better option in the end than trying to find my way around the API. At least I had an idea what I was doing. Thanks for your reply!

 

[OlafBogus]

I think this is what you may be looking for.

HBITMAP hBitmap = (HBITMAP)LoadImage(NULL, "C:\mybitmap.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE | LR_CREATEDIBSECTION | LR_DEFAULTSIZE);
if (hBitmap)
{
    CBitmap myBmp;
    myBmp.Attach(hBitmap);
    
    BITMAP bm;
    myBmp.GetBitmap(&bm);

    CDC dcImage;
    dcImage.CreateCompatibleDC (NULL);
    CBitmap* pOldBitmap = dcImage.SelectObject (&myBmp);
}

you now have access to the bitmap in 3 ways. Through CBitmap (myBmp) through the BITMAP structure (bm) and through a CDC ( dcImage).
O.B