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ImagickDraw::setGravity

(PECL imagick 2, PECL imagick 3)

ImagickDraw::setGravityConfigure la gravité de placement de texte

Description

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

Cette fonction est actuellement non documentée ; seule la liste des arguments est disponible.

Configure la gravité de placement de texte, à utiliser pour dessiner les annotations.

Liste de paramètres

gravity

Une des constantes GRAVITY (imagick::GRAVITY_*).

Valeurs de retour

Aucune valeur n'est retournée.

Exemples

Exemple #1 Exemple avec ImagickDraw::setGravity()

<?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();
}

?>

add a note

User Contributed Notes 2 notes

up
5
alan at ridersite dot org
16 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
10 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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