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PHP | Gmagick setimagedepth() function

  • Last Updated : 29 Aug, 2019

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


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:

// 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
$res = $image->getImageDepth();
echo "</br>After Set the Depth: " . $res


Previous Depth: 8
After Set the Depth: 16

Program 2:

$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 
$metrix = $im->queryFontMetrics($draw, $string); 
$draw->annotation(0, 40, $string); 
$im->newImage($metrix['textWidth'], $metrix['textHeight'], 
         new GmagickPixel('white')); 
// Draw the image          
$dpth = $im->getImageDepth();
// Display the depth of image
print("Previous Depth = " . $dpth);
$dpthnew = $im->getImageDepth();
// Display the depth of image
print("</br>Depth After Set  = " . $dpthnew);


Previous Depth = 8
Depth After Set = 32


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