PHP | Gmagick setimagedepth() function

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The Gmagick::setimagedepth() function is an inbuilt function in PHP which is used to set the depth of a particular image.

Syntax:

Gmagick Gmagick::setimagedepth( $depth )

Parameters: This function accepts a single parameter $depth which is an integer value and used to set the depth of image.

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

Below programs illustrate the Gmagick::setimagedepth() function in PHP:

Program 1:
Original Image:

<?php  
  
// require_once('path/vendor/autoload.php'); 
    
// Create an Gmagick Object 
$image = new Gmagick( 
'https://zambiatek.com/wp-content/uploads/2023/10/zambiatek-15-13.png'); 
    
// Use getImageDepth function to find the depth  
// of image 
$res= $image->getImageDepth(); 
    
// Display the depth of image 
echo "Previous Depth: " . $res;  
  
$image->setimagedepth(16); 
  
$res = $image->getImageDepth(); 
echo "</br>After Set the Depth: " . $res;  
?> 

Output:

Previous Depth: 8
After Set the Depth: 16

Program 2:

<?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);  
     
$im->setImageFormat('jpeg'); 
  
$dpth = $im->getImageDepth(); 
     
// Display the depth of image 
print("Previous Depth = " . $dpth); 
   
$im->setimagedepth(32); 
$dpthnew = $im->getImageDepth(); 
   
// Display the depth of image 
print("</br>Depth After Set  = " . $dpthnew); 
?> 

Output:

Previous Depth = 8
Depth After Set = 32

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

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