PHP | ImagickDraw setFillOpacity() Function

The ImagickDraw::setFillOpacity() function is an inbuilt function in PHP which is used to set the opacity to use when drawing using the fill color or fill texture.
Syntax:

bool ImagickDraw::setFillOpacity( $fillOpacity ) 

Parameters: This function accepts a single parameter $fillOpacity which is used to hold the value of the opacity as float type.
Return Value: This function does not return any value.
Below programs illustrates the ImagickDraw::setFillOpacity() function in PHP:
Program 1:

php

<?php

// require_once('vendor/autoload.php');

// Create ImagickDraw object
$draw = new \ImagickDraw();

// Set the stroke color
$draw->setStrokeColor('Green');

// Use setFillColor() Function
$draw->setFillColor('Red');

// Use setFillOpacity() Function
$draw->setFillOpacity(0.2);

$draw->setStrokeWidth(7);

// Create rectangle
$draw->rectangle(40, 30, 200, 260);

// Use setFillColor() Function
$draw->setFillColor('Red');

// Create rectangle of given size
$draw->rectangle(260, 30, 400, 260);

// Create an Imagick object
$image = new \Imagick();

$image->newImage(500, 300, 'white');

// Set the image format
$image->setImageFormat("png");

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

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

?>

Output:

Program 2:

php

<?php

// require_once('path/vendor/autoload.php');

// Create new ImagickDraw object
$draw = new \ImagickDraw();

// Set the stroke color
$strokeColor = new \ImagickPixel('Green');

// Set the filled color
$fillColor = new \ImagickPixel('Red');

// Set the stroke color
$draw->setStrokeColor('Green');

// Set the filled color
$draw->setFillColor('Red');

// Use setFillOpacity() Function
$draw->setFillOpacity(0.5);

// Set the stroke width
$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], ] ];

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

// Create an image object
$imagick = new \Imagick();

$imagick->newImage(300, 300, 'White');

// Set the image format
$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();
?>

Output:

Reference: http://php.net/manual/en/imagickdraw.setfillopacity.php