out of memory exception when trying to crop,shift and pad an image

Asked Jan 11 '16 at 11:07

Active Jan 11 '16 at 11:10

Viewed 25 times

I'm working on a piece of code where I want to be able to crop or shift images. During this I have managed to bring down the problem to the following line of code:

Cropped = ScaledImage.Clone(new Rectangle(hscroll, vscroll,ScaledImage.Size.Width, ScaledImage.Size.Height), ScaledImage.PixelFormat);

The actual amount of used memory is not big enough to matter (there is no infinite loop and according to the profiler I have plent of memory left (only some 200mB in use troughout the application out of 4 gigs avaible)).

The line of code here is suposed to either pad in front of an image or crop out the left and top side depending on whatever hscroll and vscroll are positive. ScaledImage is a bitMap that is currently 512 by 512.

edited Jan 11 '16 at 11:10

asked Jan 11 '16 at 11:07

Thijser

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What is ScaledImage here? – Anup Sharma Jan 11 '16 at 11:10
A bitmap of size 512 by 512. – Thijser Jan 11 '16 at 11:10
There has to be issue while cloning. What do you get when you step-in? – Anup Sharma Jan 11 '16 at 11:11
I cannot step into the Clone function it seems. – Thijser Jan 11 '16 at 11:15
And Can you please tell me the values of hscroll and vscroll? – Anup Sharma Jan 11 '16 at 11:20
I'm sure your rectangle is going out of the bitmap. So try this: new Rectangle(hscroll, vscroll,ScaledImage.Size.Width-hscroll, ScaledImage.Size.Height-vscroll) – Anup Sharma Jan 11 '16 at 11:22
Does this also work if hscroll is negative (in which case I want to pad on the left). – Thijser Jan 11 '16 at 11:26
No it wont. The rectangle has to be within the bitmap region – Anup Sharma Jan 11 '16 at 11:29
And using (Graphics gr = Graphics.FromImage(ScaledImage)) { gr.DrawImageUnscaledAndClipped(ScaledImage,new Rectangle(hscroll,vscroll,ScaledImage.Width-1,ScaledImage.Height-1)); } results in a blank. – Thijser Jan 11 '16 at 11:30
I would recommend asking a new question with that. – Anup Sharma Jan 11 '16 at 11:33
Let's try it here https://stackoverflow.com/questions/34720558/trying-to-crop-pad-an-image-returns-an-blank-image – Thijser Jan 11 '16 at 11:37

out of memory exception when trying to crop,shift and pad an image

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