PHP | GmagickDraw polygon() Function

The GmagickDraw::polygon() function is an inbuilt function in PHP which is used to draw a polygon using the current stroke, stroke width, and fill color or texture, using the specified array of coordinates.

Syntax:

GmagickDraw GmagickDraw::polygon( array $coordinates )

Parameters: This function accepts a single parameter $coordinates which holds the coordinate array.

Return Value: This function returns GmagickDraw object on success.

Exceptions: This function throws GmagickDrawException on error.



Image Used:

Below examples illustrate the GmagickDraw::polygon() function in PHP:

Example 1: Drawing over an image.

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<?php
  
// Create a new Gmagick object
$gmagick = new Gmagick('geeksforgeeks.png');
  
// Create a GmagickDraw object
$draw = new GmagickDraw();
  
// Set the fill color
$draw->setFillColor('red');
  
// Set the stroke color
$draw->setstrokecolor('green');
  
// Set the stroke width
$draw->setStrokeWidth(5);
  
// Create a polygon
$draw->polygon([
    ['x' => 300, 'y' => 50],
    ['x' => 140, 'y' => 150],
    ['x' => 380, 'y' => 150],
    ['x' => 110, 'y' => 75],
]);
  
// Use of drawimage function
$gmagick->drawImage($draw);
  
// Display the output image
header("Content-Type: image/png");
echo $gmagick->getImageBlob();
?>

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Output:

Example 2: Drawing from scratch.

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<?php
  
// Create a new Gmagick object
$gmagick = new Gmagick('geeksforgeeks.png');
  
// Create a GmagickDraw object
$draw = new GmagickDraw();
  
// Draw rectangle for background
$draw->rectangle(-10, -10, 800, 400);
  
// Set the fill color
$draw->setFillColor('#0E0E0E');
  
// Set the stroke color
$draw->setstrokecolor('green');
  
// Set the stroke width
$draw->setStrokeWidth(5);
  
// Create a polygon
$draw->polygon([
    ['x' => 400, 'y' => 50],
    ['x' => 40, 'y' => 150],
    ['x' => 480, 'y' => 150],
    ['x' => 110, 'y' => 75],
]);
  
// Use of drawimage function
$gmagick->drawImage($draw);
  
// Display the output image
header("Content-Type: image/png");
echo $gmagick->getImageBlob();
?>

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Output:

Reference: https://www.php.net/manual/en/gmagickdraw.polygon.php




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