ImagickDraw::ellipse

(PECL imagick 2.0.0)

ImagickDraw::ellipse — Draws an ellipse on the image

Description

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

Warning

This function is currently not documented; only its argument list is available.

Draws an ellipse on the image.

Parameters

ox
oy
rx
ry
start
end

Return Values

No value is returned.

Коментарии

Mar 31

Автор: Axeia


<?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;

?>