PHP 7.0.6 Released

ImagickDraw::bezier

(PECL imagick 2.0.0)

ImagickDraw::bezierDraws a bezier curve

Description

bool ImagickDraw::bezier ( array $coordinates )
Warning

This function is currently not documented; only its argument list is available.

Draws a bezier curve through a set of points on the image.

Parameters

coordinates

Multidimensional array like array( array( 'x' => 1, 'y' => 2 ), array( 'x' => 3, 'y' => 4 ) )

Return Values

No value is returned.

Examples

Example #1 ImagickDraw::bezier()

<?php
function bezier($strokeColor$fillColor$backgroundColor) {

    
$draw = new \ImagickDraw();

    
$strokeColor = new \ImagickPixel($strokeColor);
    
$fillColor = new \ImagickPixel($fillColor);

    
$draw->setStrokeOpacity(1);
    
$draw->setStrokeColor($strokeColor);
    
$draw->setFillColor($fillColor);

    
$draw->setStrokeWidth(2);

    
$smoothPointsSet = [
        [
            [
'x' => 10.0 5'y' => 10.0 5],
            [
'x' => 30.0 5'y' => 90.0 5],
            [
'x' => 25.0 5'y' => 10.0 5],
            [
'x' => 50.0 5'y' => 50.0 5],
        ], 
        [
            [
'x' => 50.0 5'y' => 50.0 5],
            [
'x' => 75.0 5'y' => 90.0 5],
            [
'x' => 70.0 5'y' => 10.0 5],
            [
'x' => 90.0 5'y' => 40.0 5],
        ],
    ];

    foreach (
$smoothPointsSet as $points) {
        
$draw->bezier($points);
    }

    
$disjointPoints = [
        [
            [
'x' => 10 5'y' => 10 5], 
            [
'x' => 30 5'y' => 90 5], 
            [
'x' => 25 5'y' => 10 5],
            [
'x' => 50 5'y' => 50 5],
        ],
        [
            [
'x' => 50 5'y' => 50 5], 
            [
'x' => 80 5'y' => 50 5],
            [
'x' => 70 5'y' => 10 5],
            [
'x' => 90 5'y' => 40 5],
         ]
    ];
    
$draw->translate(0200);

    foreach (
$disjointPoints as $points) {
        
$draw->bezier($points);
    }

    
//Create an image object which the draw commands can be rendered into
    
$imagick = new \Imagick();
    
$imagick->newImage(500500$backgroundColor);
    
$imagick->setImageFormat("png");

    
//Render the draw commands in the ImagickDraw object 
    //into the image.
    
$imagick->drawImage($draw);

    
//Send the image to the browser
    
header("Content-Type: image/png");
    echo 
$imagick->getImageBlob();
}

?>

User Contributed Notes

SkepticaLee
2 years ago
This function requires at least 3 points. The following code fails when there are only two points left in the array:

<?php
$im
= new Imagick ();
$points = array (array ('x' => 10, 'y' => 10), array ('x' => 20, 'y' => 10), array ('x' => 30, 'y' => 40), array ('x' => 40, 'y' => 20), array ('x' => 50, 'y' => 60));
$n = 0;
while (!empty (
$points))
{
   
$im->newImage (64, 64, "white");
   
$draw = new ImagickDraw ();
   
$draw->setFillColor ("none");
   
$draw->setStrokeWidth (4);
   
$draw->setStrokeColor ("black");
   
$draw->setStrokeOpacity (0.9);
   
$draw->setStrokeAntiAlias (true);
   
$draw->bezier ($points);
   
$im->drawImage ($draw);
   
$im->writeImage ("IMG_$n.png");
   
$draw->destroy ();
   
$im->destroy ();
    echo
count ($points) . ", $n: <img src=\"IMG_$n.png\"><br>";
   
$n++;
   
array_shift ($points);
}
?>
zombiebovine at gmail dot com
6 years ago
How to use:

<?php
    $width
200;
   
$height = 200;
   
$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' ) );

   
// will fail in an obscure manner if the input data is invalid
   
$points = array
    (
        array(
'x' => 0, 'y' => 200 ),
        array(
'x' => 0, 'y' => 0 ),
        array(
'x' => 200, 'y' => 200 ),
        array(
'x' => 200, 'y' => 0 )
    );
   
   
$draw->bezier($points);
           
   
$img->drawImage( $draw );
   
$img->setImageFormat( "png" );
   
   
header( "Content-Type: image/png" );
    echo
$img;
?>
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