ImagickDraw::setGravity

(PECL imagick 2, PECL imagick 3)

ImagickDraw::setGravitySets the text placement gravity

Descrizione

public ImagickDraw::setGravity(int $gravity): bool
Avviso

Questa funzione, al momento non è documentata; è disponibile soltanto la lista degli argomenti.

Sets the text placement gravity to use when annotating with text.

Elenco dei parametri

gravity

One of the GRAVITY constant (imagick::GRAVITY_*).

Valori restituiti

Nessun valore viene restituito.

Esempi

Example #1 ImagickDraw::setGravity() example

<?php
function setGravity($fillColor, $strokeColor, $backgroundColor) {

$draw = new \ImagickDraw();
$draw->setStrokeColor($strokeColor);
$draw->setFillColor($fillColor);
$draw->setStrokeWidth(1);
$draw->setFontSize(24);

$gravitySettings = array(
\Imagick::GRAVITY_NORTHWEST => 'NorthWest',
\Imagick::GRAVITY_NORTH => 'North',
\Imagick::GRAVITY_NORTHEAST => 'NorthEast',
\Imagick::GRAVITY_WEST => 'West',
\Imagick::GRAVITY_CENTER => 'Centre',
\Imagick::GRAVITY_SOUTHWEST => 'SouthWest',
\Imagick::GRAVITY_SOUTH => 'South',
\Imagick::GRAVITY_SOUTHEAST => 'SouthEast',
\Imagick::GRAVITY_EAST => 'East'
);

$draw->setFont("../fonts/Arial.ttf");

foreach (
$gravitySettings as $type => $description) {
$draw->setGravity($type);
$draw->annotation(50, 50, '"' . $description . '"');
}

$imagick = new \Imagick();
$imagick->newImage(500, 500, $backgroundColor);
$imagick->setImageFormat("png");
$imagick->drawImage($draw);

header("Content-Type: image/png");
echo
$imagick->getImageBlob();
}

?>

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User Contributed Notes 2 notes

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5
alan at ridersite dot org
17 years ago
Gravity constants are very useful as they can save having to calculate the placement of variable text strings and font sizes.

For example:
$draw->setGravity (Imagick::GRAVITY_CENTER);
$image->annotateImage($draw, 0, 0, 0, 'The quick brown fox jumps over the lazy dog');

Will horizontally and vertically center the text string.

Note, there are several gravity constants available. See, Constants — Imagick class constants
up
-2
bcre8ve at gmail dot com
11 years ago
It appears that the GRAVITY constants have an integer equivalent:
NORTHWEST = 1
NORTH = 2
NORTHEAST = 3
WEST = 4
CENTER = 5
EAST = 6
SOUTHWEST = 7
SOUTH = 8
SOUTHEAST = 9
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