How to copy a CImage object?

Question

I am trying to copy a CImage so that I can do some manipulation with it's pixels. I've tried this where source is a pointer to a loaded CImage object.

CImage* dest = new CImage(*source);

However this doesn't seem to work and I believe source and dest are pointing to the same memory.

How would I create a new copy totally detached from the previous CImage?

score 1 · Answer 1 · answered Mar 05 '12 at 17:50

1

If this is a question about MFC/ATL CImage then you can create new instance and use Create to initialize it to the size of the original CImage. Then use BitBlt to copy contents.

answered Mar 05 '12 at 17:50

marcinj

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Yes it is ATL, can you explain how to use the `BitBlt`. – Ash Burlaczenko Mar 05 '12 at 18:03
Here is a sample, srcImg.BitBlt(dstImg.GetDC(), 0, 0), dstImg should be compatible and of same size as srcImg. – marcinj Mar 05 '12 at 18:26
Don't forget to call `dstImg.ReleaseDC()` to avoid leaks. – omatai May 15 '18 at 05:18

How to copy a CImage object?

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