ImagickDraw::setGravity

(PECL imagick 2.0.0)

ImagickDraw::setGravityConfigure la gravité de placement de texte

Description

bool ImagickDraw::setGravity ( int $gravity )
Avertissement

Cette fonction n'est pas documentée et 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 constant 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(5050'"' $description '"');
    }

    
$imagick = new \Imagick();
    
$imagick->newImage(500500$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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2
alan at ridersite dot org
10 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
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0
bcre8ve at gmail dot com
4 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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