Can't Display Bitmap of Higher Resolution than CDC area

Posted by T. Jones on Stack Overflow See other posts from Stack Overflow or by T. Jones
Published on 2010-05-14T09:24:03Z Indexed on 2010/05/14 9:34 UTC
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Hi there dear gurus and expert coders.

i am not gonna start with im a newbie and don't know much about image programming but unfortunately those are the facts :(

I am trying to display an image from a bitmap pointer *ImageData which is of resolution 1392x1032. I am trying to draw that at an area of resolution or size 627x474.

However, repeated trying doesnt seem to work. It works when I change the bitmap image I created from *ImageData width and height to resolution or size of around 627x474

I really do not know how to solve this after trying all possible solutions from various forums and google.

pDC is a CDC* and memDC is a CDC initialized in an earlier method Anything uninitialized here was initialized in other methods.

Here is my code dear humble gurus. Do provide me with guidance Yoda and Obi-Wan provided to Luke Skywalker.

void DemoControl::ShowImage( void *ImageData )
{


    int Width; //Width of Image From Camera
    int Height; //Height of Image From Camera

    int m_DisplayWidth = 627 ;//width of rectangle area to display
    int m_DisplayHeight = 474;//height of rectangle area to display

    GetImageSize( &Width, &Height ) ; //this will return Width = 1392, Height 1032

    CBitmap bitmap;

    bitmap.CreateBitmap(Width,Height,32,1,ImageData);

    CBitmap* pOldBitmap = memDC.SelectObject((CBitmap*)&bitmap);

    pDC->BitBlt(22, 24, 627, 474, &memDC, 0, 0, SRCCOPY);

    memDC.SelectObject((CBitmap*)pOldBitmap);

    ReleaseDC(pDC);

}

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