ImagickDraw::ellipse()

(PECL imagick 2.0.0)

Draws an ellipse on the image

说明

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

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();
}
?>

<?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;
?>