imagickdraw::polygon()函数是PHP的Imagick库中的内置函数, 用于使用指定的坐标数组绘制多边形。
语法如下:
bool ImagickDraw::polygon( $coordinates )
参数:该函数接受单个参数$坐标数组类型。它用于保存点集。
返回值:成功时此函数返回TRUE。
下面的程序演示了PHP中的ImagickDraw::polygon()函数
程序:
<?php
// require_once('vendor/autoload.php');
// Create an ImagickDraw object
$draw = new \ImagickDraw();
// Set the opacity of image
$draw ->setStrokeOpacity(1);
// Set the color of image
$draw ->setStrokeColor( 'Green' );
// Set the stroke width
$draw ->setStrokeWidth(4);
// Set the fill color
$draw ->setFillColor( 'Red' );
// Array contains points
$points = [
[ 'x' => 50 * 6, 'y' => 10 * 5], [ 'x' => 20 * 7, 'y' => 30 * 5], [ 'x' => 60 * 8, 'y' => 50 * 5], [ 'x' => 70 * 3, 'y' => 15 * 5], ];
// Draw the polygon with gicen points
$draw ->polygon( $points );
// Create an Imagick object
$image = new \Imagick();
// Ctrate an image of given size
$image ->newImage(500, 300, 'white' );
// Set the image format
$image ->setImageFormat( "png" );
// Draw the image
$image ->drawImage( $draw );
header( "Content-Type: image/png" );
// Display the output image
echo $image ->getImageBlob();
?>
输出如下:
参考:
http://php.net/manual/en/imagickdraw.polygon.php