PHP | Imagick setImageMatte() Function

The Imagick::setImageMatte() function is an inbuilt function in PHP which is used to set the matte channel of an imagick object.

Syntax:

bool Imagick::setImageMatte( $matte )

Parameters: This function accepts single parameter $matte. If the parameter set to True then it activate the matte channel and if the parameter set to False then it disable the matte channel.

Return Value: This function returns True on success.

Below programs illustrate the Imagick::setImageMatte() function in PHP:

Program 1:
Original Image:
https://cdncontribute.geeksforgeeks.org/wp-content/uploads/geeks-21.png

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<?php
  
// Create new Imagick object
$imagick = new Imagick(
  
// Using getImageMatte function
$res = $imagick->getImageMatte();
  
// Display result
echo "Matte Before: " . $res . "</br>";
  
// Set Image matte true.
// If it set to false then matte will 
// disable and return nothing when 
// using getimagematte function
$imagick->setImageMatte(true);
  
// Using getImageMatte function
$res = $imagick->getImageMatte();
  
// Display result
echo "Matte After: " . $res . "</br>";
?>

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Output:

Matte Before: 1
Matte After: 1

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

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<?php 
  
$string = "Computer Science portal for Geeks!"
  
// Creating new image of above String 
// and add color
$im = new Imagick(); 
$draw = new ImagickDraw(); 
  
// Fill the color in image 
$draw->setFillColor(new ImagickPixel('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 ImagickPixel('white')); 
// Draw the image         
$im->drawImage($draw); 
$im->setImageFormat('jpeg'); 
  
// Using getImageMatte function
$res = $im->getImageMatte();
  
// Display result
echo "Matte Before: " . $res . "</br>";
  
// Set Image matte true/false or (0/1)
// if set false then matte will disable 
// and return nothing when 
// using getimagematte function
$im->setImageMatte(false);
  
// Using getImageMatte function
$res = $im->getImageMatte();
  
// Display result
echo "Matte After: " . $res . "</br>";
?>

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Output:

Matte Before: 1
Matte After: 

Reference: http://php.net/manual/en/imagick.setimagematte.php



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