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; ?>