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    ImagickDraw::ellipse

    (PECL imagick 2, PECL imagick 3)

    ImagickDraw::ellipse — 画像上に楕円を描画する

    説明

    public ImagickDraw::ellipse(
        float $ox,
        float $oy,
        float $rx,
        float $ry,
        float $start,
        float $end
    ): 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。

    画像上に楕円を描画します。

    パラメータ

    ox

    oy

    rx

    ry

    start

    end

    戻り値

    値を返しません。

    例

    例1 ImagickDraw::ellipse() の例

    <?php
    function ellipse($strokeColor, $fillColor, $backgroundColor) {

    $draw = new \ImagickDraw();
    $draw->setStrokeColor($strokeColor);
    $draw->setFillColor($fillColor);

    $draw->setStrokeWidth(2);
    $draw->setFontSize(72);

    $draw->ellipse(125, 70, 100, 50, 0, 360);
    $draw->ellipse(350, 70, 100, 50, 0, 315);

    $draw->push();
    $draw->translate(125, 250);
    $draw->rotate(30);
    $draw->ellipse(0, 0, 100, 50, 0, 360);
    $draw->pop();

    $draw->push();
    $draw->translate(350, 250);
    $draw->rotate(30);
    $draw->ellipse(0, 0, 100, 50, 0, 315);
    $draw->pop();

    $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 1 note

    up
    1
    Axeia
    15 years ago
    <?php
    /**
    * Please note that if you use a stroke. ( Imagick::setStrokeWidth( 2 ) ) the
    * stroke is drawn outside the ellipse dimensions.
    *
    * @param float $ox - Offset X, distance from the center of the ellipse till the left border of the image
    * @param float $oy - Offset Y, distance from the center of the ellipse till the top of the image
    * @param float $rx - X radius
    * @param float $ry - Y radius
    * @param float float $start - Starting angle in degrees.
    * @param float float $end - End angle in degrees.
    *
    */
    ImagickDraw::ellipse( float $ox , float $oy , float $rx , float $ry , float $start , float $end );
    ?>

    Example of drawing a full ellipse (from 0, 360) and outputting it as a PNG.
    Do note, that this is by default anti-aliased unlike the GD functions which only support it on lines that aren't on a transparent background.
    <?php
    $width     = 200;
    $height = 100;
    $border = 2;

    $img = new Imagick();
    $img->newImage( $width, $height, new ImagickPixel( 'transparent' ) );

    $draw = new ImagickDraw();
    $draw->setStrokeColor( new ImagickPixel( 'black' ) );
    $draw->setStrokeWidth( 2 );
    $draw->setFillColor( new ImagickPixel( 'transparent' ) );
    //Substract the border from the radius so it doesn't fall outside the screen.
    $draw->ellipse( $width/2, $height/2, ($width/2)-$border, ($height/2)-$border, 0, 360 );
    $img->drawImage( $draw );
    $img->setImageFormat( "png" );

    header( "Content-Type: image/png" );
    echo     $img;
    ?>
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