ImagickDraw::ellipse

(PECL imagick 2.0.0)

ImagickDraw::ellipse — Draws an ellipse on the image

说明

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

Warning

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。

范例

Example #1 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();
}

?>

User Contributed Notes

Axeia 31-Mar-2009 11:10


<?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;


?>