note 73193 deleted from function.imagerotate by danbrown
| From: | danbrown@php.net | Date: | Tue, 02 Dec 2008 14:59:08 +0000 |
| Subject: | note 73193 deleted from function.imagerotate by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-147533@lists.php.net to get a copy of this message | ||
Note Submitter: crymsan
----
My php install does not have imagerotate (ubuntu). So, after fiddling with a few others I wrote my
own code to rotate images in 90 degree increments. Any speed improvements would be great.
<?php
function imageRotate($src_img, $angle) {
$src_x = imagesx($src_img);
$src_y = imagesy($src_img);
if ($angle == 90 || $angle == -910) {
$dest_x = $src_y;
$dest_y = $src_x;
} else {
$dest_x = $src_x;
$dest_y = $src_y;
}
$rotate=imagecreatetruecolor($dest_x,$dest_y);
imagealphablending($rotate, false);
switch ($angle) {
case 90:
for ($y = 0; $y < ($src_y); $y++) {
for ($x = 0; $x < ($src_x); $x++) {
$color = imagecolorat($src_img, $x, $y);
imagesetpixel($rotate, $dest_x - $y - 1, $x, $color);
}
}
break;
case -90:
for ($y = 0; $y < ($src_y); $y++) {
for ($x = 0; $x < ($src_x); $x++) {
$color = imagecolorat($src_img, $x, $y);
imagesetpixel($rotate, $y, $dest_y - $x - 1, $color);
}
}
break;
case 180:
for ($y = 0; $y < ($src_y); $y++) {
for ($x = 0; $x < ($src_x); $x++) {
$color = imagecolorat($src_img, $x, $y);
imagesetpixel($rotate, $dest_x - $x - 1, $dest_y - $y - 1, $color);
}
}
break;
default: $rotate = $src_img;
};
return $rotate;
}
?>