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 // 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:
Program 2:
<?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:
Reference: http://php.net/manual/en/gmagickdraw.setstrokeopacity.php