Would it be possible to adjust the anti-aliasing level for the display ?

[maiaaan]

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I wanted to apply anti-aliasing on all the images displayed. First, I used the function antialiased(). However, there is no parameter in the function to adjust the level of anti-aliasing, so the function has to be applied several time for the desired level of aliasing which is impractical and can quickly become unreadable. In the same way, in the default rendering properties settings, it is not possible to adjust the level of anti-aliasing.

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1. A parameter that allows to adjust the desired level of anti-aliasing in the antialiased() function.
2. A parameter that allows to adjust the desired level of anti-aliasing in the default rendering properties settings.

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[AlexisDrogoul]

Hi -- there is no such thing as a "level of antialiasing" or at least not really.

For individual images, antialiased corresponds to the application of a light blur convolution mask. So what you are doing is correct : applying x times the mask will progressively soften the image. If you find it more convenient than repeatedly calling this operator, I can provide an alternative operator with a second parameter (the "level", which would the number of times you apply it). For instance: im2 <- antialised(im1, 5);.

In that case, I should also provide it for blurred and sharpened (and maybe add a percentage to brighter to be aligned with darker), as they obey the same principle.

Regarding antialiasing the display, it is more delicate. In Java2D, antialias is on or off (no levels), and it comes accompanied by options (quality of sampling, resizing, etc.) which sometimes have levels, sometimes have not. So basically, setting antialias: to true means more or less "use the best quality to render a crisp image". In OpenGL, it's even more complicated as some platforms will not implement some aspects of antialiasing, so we set all options to true in the settings -- and there are no real levels unless we implement them using shaders ...

So the only (cheap but fast) solution is to implement the image operators above. What do you think ?

[maiaaan]

Yes, it seems to be a good solution to add a parameter indicating how many times to apply the mask.

[lesquoyb]

The new operator seem to work, however I found an edge case where I'm not sure the antialiased function is doing the right thing:
if used on images containing transparent pixels, the operator will add transparency everywhere, while in my opinion of some pixels are purely transparent they should completely be excluded from the algorithm.
Example with this model:

the hand is an image the size of the world with most of it's content being transparent pixels, so I can create a complex stack of image layers. But if I use the antialiased operator on it I end up getting this (here with 200 repetition but it obviously already shows unwanted effects with lower values):

[lesquoyb]

I think it's safe to say that the main request has been answered and the point I raised is secondary and will be done in next release