This function will make the image wrap around from bottom to top or side to side, hence "roll". If you want to just offset an image without the wrap-around, use Imagick::extentImage instead.
(PECL imagick 2, PECL imagick 3)
Imagick::rollImage — Offsets an image
$x
, int $y
) : boolOffsets an image as defined by x and y.
xThe X offset.
yThe Y offset.
成功时返回 true。
Example #1 Imagick::rollImage()
<?php
function rollImage($imagePath, $rollX, $rollY) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->rollimage($rollX, $rollY);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>
This function will make the image wrap around from bottom to top or side to side, hence "roll". If you want to just offset an image without the wrap-around, use Imagick::extentImage instead.