ImagickDraw::ellipse

(PECL imagick 2, PECL imagick 3)

ImagickDraw::ellipse — Draws an ellipse on the image

说明

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

警告

本函数还未编写文档，仅有参数列表。

Draws an ellipse on the image.

参数

ox
oy
rx
ry
start
end

返回值

没有返回值。

示例

示例 #1 ImagickDraw::ellipse() example

<?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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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;

?>