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(     // 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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