ImagickDraw::setGravity

    (PECL imagick 2, PECL imagick 3)

    ImagickDraw::setGravity — Sets the text placement gravity

    Опис

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

    Наразі ця функція не документована. Доступний лише список її параметрів.

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

    Параметри

    gravity

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

    Значення, що повертаються

    Не повертає значень.

    Приклади

    Приклад #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

    up
    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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