ImagickDraw::setGravity

(PECL imagick 2.0.0)

ImagickDraw::setGravitySets the text placement gravity

Описание

bool ImagickDraw::setGravity ( int $gravity )
Внимание

К настоящему времени эта функция еще не была документирована; для ознакомления доступен только список аргументов.

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

Список параметров

gravity

GRAVITY_ constant

Возвращаемые значения

Эта функция не возвращает значения после выполнения.

Примеры

Пример #1 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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