PHP | Gmagick setimageresolution() Function

The Gmagick::setimageresolution() function is an inbuilt function in PHP which is used to set the resolution of an image object.

Syntax:

Gmagick Gmagick::setImageResolution($x_resolution, $y_resolution)

Parameters: This function accept two parameters as mentioned above and described below:

• $x_resolution: It is required parameter which specifies the x-axis resolution.
• $y_resolution: It is required parameter which specifies the y-axis resolution.

Return Value: This function returns the Gmagick object on success.

Below program illustrates the Gmagick::setimageresolution() function in PHP:

Program 1:
Original Image:

<?php

$gmagick = new Gmagick(
'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-15.png');

// Getting Resolution of image
// using getimageresolution function
$res = $gmagick->getImageResolution();
echo "X = ".$res['x'] . "</br>";
echo "Y = ".$res['y'] . "</br>";

// Function to set image resolution
$gmagick->setimageresolution(50, 50);


echo "After Set Resolution: </br>";

// Getting Resolution of image
// using getimageresolution function
$res = $gmagick->getImageResolution();
echo "X = " . $res['x'] . "</br>";
echo "Y = " . $res['y'] . "</br>";
?>

Output:

X = 37.8
Y = 37.8
After Set Resolution:
X = 50
Y = 50

Program 2:
Original Image:

<?php
$string = "Computer Science portal for Geeks!";

// Creating new image of above String
// and add color and background
$im = new Gmagick();
$draw = new GmagickDraw();

// Fill the color in image
$draw->setFillColor(new GmagickPixel('green'));

// Set the text font size
$draw->setFontSize(50);

$metrix = $im->queryFontMetrics($draw, $string);
$draw->annotation(0, 40, $string);
$im->newImage($metrix['textWidth'], $metrix['textHeight'],
         new GmagickPixel('white'));

// Draw the image
$im->drawImage($draw);
echo "Before: </br>";

// Getting Resolution of created image
// using getimageresolution function
$res = $im->getImageResolution();
echo "X = ".$res['x'] . "</br>";
echo "Y = ".$res['y'] ." </br>";


// Set image resolution (50, 50)
$im->setimageresolution(50, 50);

echo "After:</br> ";

// Getting Resolution of created image
// using getimageresolution function
$res = $im->getImageResolution();
echo "X = ".$res['x'] . "</br>";
echo "Y = ".$res['y'] ." </br>";
?>

Output:

Before:
X = 0
Y = 0
After:
X = 50
Y = 50

Reference: http://php.net/manual/en/gmagick.setimageresolution.php