Slick Forums

Image.getColor(int x, int y) doesn't work properly if the image is flipped. It returns the color of the pixel above/left of the desired one, causing an ArrayIndexOutOfBoundsException on getColor(0, 0) if the image is flipped vertically and its width and height are power of 2 values.




This makes it impossible to take a screenshot (1024*512) of my Application.

getColor acts on the backing texture, which itself isn't being flipped/scaled, i.e. along those lines image.getScaledCopy(..).getColor(..) will not work as expected. I'll clear this up in the docs.

I'll add a check for flipped images, though.

Why do you need this for screenshots, anyways? You would take a screenshot with code that looks like this. I can wrap this as a static method in Slick, if you'd like.

Looks like you're wrong.
Using the attachet image this code:

produces this output:


so getFlippedCopy(...).getColor(...) did work kinda like expected.
Nevertheless it returns the color for a wrong pixel.


Returns the same color regardless of wether the image is flipped or not, which shouldn't be possible on that image.
Resulting in the error mentioned in the first post in certain circumstances.

I used this code for screenshots because i found it here.

[edit] Just noticed you fixed it now. So, nevermind.

Yeah, I just added it a small change. Let me know if the new code produces problems.