ImagickDraw::bezier

(PECL imagick 2, PECL imagick 3)

ImagickDraw::bezier — Draws a bezier curve

Descrizione

public ImagickDraw::bezier(array $coordinates): bool

Avviso

Questa funzione, al momento non è documentata; è disponibile soltanto la lista degli argomenti.

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

Elenco dei parametri

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

Valori restituiti

Nessun valore viene restituito.

Esempi

Example #1 ImagickDraw::bezier() example

<?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(0, 200);

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

    //Create an image object which the draw commands can be rendered into
    $imagick = new \Imagick();
    $imagick->newImage(500, 500, $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();
}

?>

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User Contributed Notes 2 notes

down

SkepticaLee ¶

10 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);
}
?>

down

zombiebovine at gmail dot com ¶

15 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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