What is the use case for imageantialias($img, false)

Question

I don't understand why in PHP when using the imageantialias function you need to pass in a Bool to say if you want to enable anti-aliasing or not.

It feels counter intuitive to call a function with a parameter to say don't do anything.

Is there a use case for calling it with false that I am missing?

Perhaps to disable anti-aliasing on an image that is already enabled for anti-aliasing ... ie process the same image twice — Manse, Jan 05 '12 at 12:18

score 2 · Accepted Answer · answered Jan 05 '12 at 12:19

2

Passing false doesn't tell the function to do nothing, but to turn antialiasing off, if it was on. A usecase would be drawing to an image with antialiasing, later wanting to draw some more without antialiasing.

answered Jan 05 '12 at 12:19

Eugen Rieck

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Ah, excellent - I didn't know you could turn anti-aliasing off on an image that had already had it. That makes much more sense. – Toby Jan 05 '12 at 12:22

score 1 · Answer 2 · answered Jan 05 '12 at 12:21

1

This is an enable/disable function.

So if I call:

imageantialias($image, TRUE);

...then anti-aliasing is enabled for $image. And if I then call:

imageantialias($image, FALSE);

I have disabled it again.

answered Jan 05 '12 at 12:21

DaveRandom

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What is the use case for imageantialias($img, false)

2 Answers2