ImagickDraw::ellipse

(PECL imagick 2, PECL imagick 3)

ImagickDraw::ellipse — Dessine une ellipse sur une image

Description

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

Avertissement

Cette fonction est actuellement non documentée ; seule la liste des arguments est disponible.

Dessine une ellipse sur une image.

Liste de paramètres

ox
oy
rx
ry
start
end

Valeurs de retour

Aucune valeur n'est retournée.

Exemples

Exemple #1 Exemple avec ImagickDraw::ellipse()

<?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

down

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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