ImagickDraw::setGravity

(PECL imagick 2.0.0)

ImagickDraw::setGravitySets the text placement gravity

Opis

ImagickDraw::setGravity ( int $gravity ) : bool
Ostrzeżenie

Ta funkcja jest obecnie nieudokumentowana, dostępna jest jedynie lista jej argumentów.

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

Parametry

gravity

GRAVITY_ constant

Zwracane wartości

Nie jest zwracana żadna wartość.

Przykłady

Przykład #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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3
alan at ridersite dot org
12 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
0
bcre8ve at gmail dot com
6 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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