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    ImagickDraw::setGravity

    (PECL imagick 2, PECL imagick 3)

    ImagickDraw::setGravity — テキストの配置時の gravity を設定する

    説明

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

    この関数は、 現在のところ詳細な情報はありません。引数のリストのみが 記述されています。

    テキストによる注記を行う際に使用するテキスト配置の gravity を設定します。

    パラメータ

    gravity

    GRAVITY 定数 (imagick::GRAVITY_*) のうちのいずれか

    戻り値

    値を返しません。

    例

    例1 ImagickDraw::setGravity() の例

    <?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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