[RESOLVED] Cropping an image.

[beedie]

I am trying to crop an image that has been uploaded. Ideally I could crop it as a perfect circle.
Is this possible with php?

[rsmith]

Maybe with GD... I'm pretty sure with ImageMagick

[beedie]

I see a crop option in ImageMagick but only as a square.

[NogDog]

Strictly speaking, I don't think you can crop an image as anything except a rectangle. For a circle, you'd probably first crop it as a square, then do some kind or routine to set the "corner" pixels (that would be outside of the desired circular area) to be transparent (or to the background color).

[beedie]

Thanks NogDog. That is as far as I have got to as well.

[Weedpacket]

I had a bit of a fiddle.

<?php

$image = imagecreatefromjpeg('input.jpg');

$x = imagesx($image);
$y = imagesy($image);
$mask = imagecreatetruecolor($x,$y);


$white = imagecolorallocate($mask,255,255,255);
$blank = imagecolorallocate($mask,0,0,0);
imagefilledrectangle($mask, 0, 0, $x, $y, $white); // Or draw other background.

imagecolortransparent($mask, $blank);

$centrex = (int)($x/2);
$centrey = (int)($y/2);
$diameter = (int)min($x, $y);
imagefilledellipse($mask, $centrex, $centrey, $diameter, $diameter, $blank);

imagecopymerge($image, $mask, 0, 0, 0, 0, $x, $y, 100);

imagejpeg($image, 'output.jpg');

[beedie]

Weedpacket that is great but what i hadn't mentioned and I really want is for the area around the circle to be transparent. I don't think jpeg can do that. Any suggestions ?

[beedie]

Weedpacket your code was perfect once I switched to png
Thanks.