Getting out of memory exception when loading high resolution image with IImagingFactory

Question

I am trying to load high resolution image(like 3264x2448). For that I am using IImageFactory class in C#. IImageFactory is downloaded from the Microsoft site. If I try to load the high resolution image I am getting “out of memory” exception. Have a look at the below sample:

IImage GetIImage(string fileName)
{

Bitmap bitmap = null;

Graphics graphics = null;
IntPtr hdcDestination = IntPtr.Zero;   
try    {
    IImage image = null;
    IImagingFactory imagingFactory = ImagingFactory.GetImaging();
    imagingFactory.CreateImageFromFile(fileName, out image);
    bitmap = new Bitmap(width, height);
    graphics = Graphics.FromImage(bitmap);
    hdcDestination = graphics.GetHdc();
           Rectangle dstRect = new Rectangle(0, 0, width, height);
   image.Draw(_graphicsHDC, ref dstRect, IntPtr.Zero);
}
catch{}
}

Using the above source lines I was able to load the images but my effort to draw image fails, throwing an OutOfMemory Excep :( Further, I tried the same by creating a Win32 mobile App, in which I could bot Load and Draw the desired images with the following lines.

void DrawImage(HDC *hdc, char *FileName, int width, int height)
{
IImagingFactory *pImgFactory = NULL;
IImage *pImage = NULL;
RECT rc = { 0, 0, width, height};

WCHAR Name[MAX_PATH] ={0}; 
mbstowcs (Name, FileName, strlen (FileName));
CoInitializeEx(NULL, COINIT_MULTITHREADED);
if (SUCCEEDED(CoCreateInstance (CLSID_ImagingFactory,
                                NULL,
                                CLSCTX_INPROC_SERVER,
                                IID_IImagingFactory,
                                (void **)&pImgFactory)))
{
    // Load the image from the JPG file.
    if (SUCCEEDED(pImgFactory->CreateImageFromFile(Name, &pImage)))
    {
        pImage->Draw(*hdc, &rc, NULL);
        pImage->Release();
    }

    pImgFactory->Release();
}
CoUninitialize();}

I even tried creating a win32 dll and invoke it from C# app but I couldn't. Can anyone help me out to resolve this issue?

Answer 1

you need to increase a memory limit for it ... Got a similar problem with different language (PHP), once increased a memory limit to 25mb. it solved a problem.

Answer 2

Though you don't want to use OpenNETCF, I will offer it anyway: This seems to be exactly what you are experiencing.
Have to admit I didn't try this myself - just googled a bit.

Answer 3

Of course it does. You loaded an image and then are trying to display the whole thing. To do so, the CF has to turn it into a Bitmap for the display driver. 3264x2448x16bpp == nearly 16MB. What you should be doing is generating a thumbnail and drawing that to the rectangle.

And, as usual, the Smart Device Framework already has this done for you.