Syntax:int Imagick::getImageAlphaChannel (void)
Parameters:This function takes no parameters.
Exceptions:This function throws an ImagickException on error.
Return value:this function returns an integer value on success.The ALPHACHANNEL constants are listed below:
- imagick::ALPHACHANNEL_ACTIVATE (0)
- imagick::ALPHACHANNEL_DEACTIVATE (1)
- imagick::ALPHACHANNEL_RESET (2)
- imagick::ALPHACHANNEL_SET (3)
- imagick::ALPHACHANNEL_UNDEFINED (4)
- imagick::ALPHACHANNEL_COPY (5)
- imagick::ALPHACHANNEL_EXTRACT (6)
- imagick::ALPHACHANNEL_OPAQUE (7)
- imagick: : ALPHACHANNEL_SHAPE (8)
- imagick::ALPHACHANNEL_TRANSPARENT (9)
The following programs illustrate the
Imagick::getImageAlphaChannel()function in PHP: Program 1:
// Create a new imagick object with a PNG image $imagick = new Imagick ( ’ https://media.engineerforengineer.org/wp-content/uploads/engineerforengineer-13.png ’ );
// Get alpha channel $alphaChannel = $imagick -> getImageAlphaChannel(); echo $alphaChannel ; ?> Output:1 (which corresponds to imagick::ALPHACHANNEL_DEACTIVATE.)
Program 2:
// Create new imagick object with PNG image $imagick = new Imagick ( ’ https://media.engineerforengineer.org/wp-content/uploads/20191112214917/engineerforengineer8.jpg ’ );
// Get alpha channel $alphaChannel = $imagick -> getImageAlphaChannel(); echo $alphaChannel . "
" ;
// Set alpha channel $alphaChannel = $imagick -> setImageAlphaChannel (imagick::ALPHACHANNEL_RESET); // Get alpha channel $alphaChannel = $imagick -> getImageAlphaChannel(); echo $alphaChannel ; ?> Output:0 1
Link: https://www.php.net/manual/en/imagick.getimagealphachannel.php
