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Index › Programming Questions & Help › Syntax Questions › Get/Save/CreateGraphics
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Get/Save/CreateGraphics (Read 862 times)
Lynas
Get/Save/CreateGraphics
Oct 20th, 2009, 3:25pm  
Hi,

I was wondering how I create an PImage of my full image and not only of the image visible. My image is bigger than the display and if I call get() for instance I only get what I see. Same with save and createGraphics.

Using width, height returns the same result.

Thanks,
Lynas
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ben_hem
Re: Get/Save/CreateGraphics
Reply #1 - Oct 20th, 2009, 11:44pm  
yep, if you have a PGraphics object named "myOffscreenImage" you can just call myOffscreenImage.get()...same with .saveFrame(), etc.
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Lynas
Re: Get/Save/CreateGraphics
Reply #2 - Oct 21st, 2009, 1:23am  
So next to the onscreen image I have to create an offscreen image as well?
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PhiLho 
Re: Get/Save/CreateGraphics
Reply #3 - Oct 21st, 2009, 2:52am  
Well, yes, it makes sense since your image won't fit in the window...
In case you are wondering, no, you cannot create an onscreen image bigger than the window. That's not really a problem, onscreen image rarely takes much memory.
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ChristianT
Re: Get/Save/CreateGraphics
Reply #4 - Oct 21st, 2009, 4:28am  
You can also save yourself the hassle of creating and always drawing onto the offscreen image by using the size(width,height) command to make the onscreen image large enough.  Or am I missing something here?

Code:
size(10000, 100);
line(0, 0, 10000, 100);
save("test.png");

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Lynas
Re: Get/Save/CreateGraphics
Reply #5 - Oct 21st, 2009, 6:08am  
But then the image is very large, right?
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ChristianT
Re: Get/Save/CreateGraphics
Reply #6 - Oct 21st, 2009, 3:05pm  
Yes, but it will also be very large if you create an off-screen buffer.

What exactly did you mean by "my full image" and "visible image" in your original post?

You could make things fit into a smaller area by using a transformation matrix:
Code:
size(100, 100);
pushMatrix();
scale(0.5);
line(0, 200, 200, 0);
popMatrix();
save("test.png");

This will produce a 100x100 pixel PNG with a diagonal line, even though the line coordinates were beyond the image boundaries (but scaled down to fit).
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