OutOfMemoryException error for bitmap

Question

I am getting a System.OutOfMemoryException when I try storing a portions of an image to a bitmap using a loop. I do not think it's because the image is too big because another version of my code uses multiple of the same image but without a bitmap. Here is what I got:

Bitmap map = new Bitmap(img);

for (int i = 0; i < 4; i++) {
    for (int y = 0; y < 4; y++) {
        // Clone a portion of the Bitmap object.
        Rectangle rec = new Rectangle(i*(img.Width / 4), 
                                    y*(img.Height / 4),
                                    img.Width,//image width
                                    img.Height);

        PixelFormat format =  map.PixelFormat;
        Bitmap clone = null;
        try {
            clone = map.Clone(rec, format);
        } catch (OutOfMemoryException e)

Hamid Pourjam · Accepted Answer · 2015-12-29 21:08:17Z

3

It is because your rectangle bounds are not inside the image.

I think you misunderstood the constructor for Rectangle It gets upper left corner (first and second parameter) and width and height of the rectangle. When you set upper left corner inside your bitmap and provide image.Width and image.Height as width and height of the rectangle it will definitely fall outside of bitmap and you will get OutOfMemoryException

edited Dec 29, 2015 at 21:08

answered Dec 29, 2015 at 20:42

Hamid Pourjam

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1 Comment

bob dylan Over a year ago

ohhh okay, thanks! So the first who values would be the x and y position of the top left corner then, if say I wanted to start at the top left corner?

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