note 33145 added to function.imagecolorallocatealpha
| From: | jimizim at yahoo dot com | Date: | Tue, 17 Jun 2003 16:29:56 +0000 |
| Subject: | note 33145 added to function.imagecolorallocatealpha | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-50518@lists.php.net to get a copy of this message | ||
OK, i got the alpha transparacency to work.
You need to use:
imagecreatetruecolor
instead of:
imagecreate
Now the issue is to get 2 circles to overlap with transparency so that it turns colors where they
overlap. If anyone knows if this can be done that would be great. This is the code that works for
creating circles that overlap with transparency.
$Image=imagecreatetruecolor(600,600);
$yellowX = 100;
$yellowY = 75;
$redX = 120;
$redY = 165;
$blueX = 187;
$blueY = 125;
$yellow = imagecolorallocatealpha ( $Image, 255, 255, 0, 75);
ImageArc($Image, $yellowX, $yellowY,$radius*2,$radius*2,0,360,$yellow);
imagefill ($Image, $yellowX, $yellowY, $yellow);
$red = imagecolorallocatealpha ( $Image, 255, 0, 0, 75);
ImageArc($Image, $redX, $redY,$radius*2,$radius*2,0,360,$red);
imagefill ($Image, $redX, $redY, $red);
$blue = imagecolorallocatealpha ( $Image, 0, 0, 255, 75);
ImageArc($Image, $blueX, $blueY,$radius*2,$radius*2,0,360,$blue);
imagefill ($Image, $blueX, $blueY, $blue);
ImagePNG($Image);
ImageDestroy($Image);
----
Manual Page -- http://www.php.net/manual/en/function.imagecolorallocatealpha.php
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