ImagickDraw::ellipse

(PECL imagick 2, PECL imagick 3)

ImagickDraw::ellipse画像上に楕円を描画する

説明

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

この関数は、 現在のところ詳細な情報はありません。引数のリストのみが 記述されています。

画像上に楕円を描画します。

パラメータ

ox

oy

rx

ry

start

end

戻り値

値を返しません。

例1 ImagickDraw::ellipse() の例

<?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

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1
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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