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PHP | GmagickDraw setstrokeopacity() Function
  • Last Updated : 08 Mar, 2021

The GmagickDraw::setstrokeopacity() function is an inbuilt function in PHP that is used to specify the opacity of stroked object outlines. The value of opacity lies between 0 and 1.

Syntax: 

public GmagickDraw::setstrokeopacity( $stroke_opacity ) : GmagickDraw

Parameters: This function accepts a single parameter $stroke_opacity which is used to hold the value of stroke opacity as float type.
Return Value: This function returns the GmagickDraw object on success.
Below programs illustrate the GmagickDraw::setstrokeopacity() function in PHP:
Program 1: 

php




<?php
 
// require_once('path/vendor/autoload.php');
 
// Create an GmagickDraw object to draw into.
$draw = new \GmagickDraw();
 
// Set the stroke color
$draw->setStrokeColor('Green');
 
// Set the filled color
$draw->setFillColor('Red');
 
// Set the stroke opacity
$draw->setStrokeOpacity(0.5);
 
// Set the stroke width
$draw->setStrokeWidth(9);
 
// Draw the rectangle
$draw->rectangle(40, 30, 200, 260);
 
// Create new gmagick object
$image = new \Gmagick();
 
// Create new image of given size
$image->newImage(240, 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();
?>

Output: 
 



setstrokeopacity

Program 2: 

php




<?php
 
// require_once('path/vendor/autoload.php');
 
// Create an GmagickDraw object to draw into.
$draw = new \GmagickDraw();
 
// Set the Stroke Color
$draw->setStrokeColor('Black');
 
// Set the Stroke Opacity
$draw->setStrokeOpacity(0.6);
 
// Set the Stroke Width
$draw->setStrokeWidth(4);
 
//Set the filled color
$draw->setFillColor('lightgreen');
$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
$draw->polygon($points);
 
// Create new Gmagick object
$image = new \Gmagick();
 
// Set the image dimensions
$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 image
echo $image->getImageBlob();
?>

Output: 
 

setstrokeopacity

Reference: http://php.net/manual/en/gmagickdraw.setstrokeopacity.php
 

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