PHP | Gmagick setimagedepth() function

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

Syntax:

public Gmagick::setimagedepth( $depth ) : Gmagick

Parameters: This function accepts 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:

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<?php 
  
// require_once('path/vendor/autoload.php');
    
// Create an Gmagick Object
$image = new Gmagick(
    
// 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
?>

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Output:

Previous Depth: 8
After Set the Depth: 16

Program 2:
https://cdncontribute.geeksforgeeks.org/wp-content/uploads/Screenshot-from-2018-10-16-23-23-54-1.png

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<?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);
?>

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Output:

Previous Depth = 8
Depth After Set = 32

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



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