The ImagickKernel::fromBuiltIn() function is an inbuilt function in PHP which is used to create a kernel from a builtin kernel.
Syntax:
ImagickKernel ImagickKernel::fromBuiltIn( int $kernelType, string $kernelString )
Parameters: This function accept two parameters as mentioned above and described below:
- $kernelType: It specifies the type of kernel.
- $kernelString: It specifies the string that describe the parameters.
Return Value: This function returns a new ImagickKernel object on success.
Exceptions: This function throws ImagickException on error.
Below programs illustrate the ImagickKernel::fromBuiltIn() function in PHP:
Program 1:
<?php // Create a kernel from matrix $kernel = ImagickKernel::fromBuiltIn(Imagick::KERNEL_DIAMOND, "2" );
echo "The matrix of Builtin kernel - Diamond: <br/>" ;
// Get the matrix from kernel $matrix = $kernel ->getMatrix();
foreach ( $matrix as $row ) {
foreach ( $row as $cell ) {
if ( $cell === false) {
$output .= "0" ;
} else {
$output .= $cell ;
}
}
$output .= "<br>" ;
} echo $output ;
?> |
Output:
The matrix of Builtin kernel - Diamond: 00100 01110 11111 01110 00100
Program 2:
<?php // Create a new imagick object $imagick = new Imagick(
// Create a kernel from built In types $kernel = ImagickKernel::fromBuiltIn(Imagick::KERNEL_SQUARE, "2" );
// Scale the kernel $kernel ->scale(2, Imagick::NORMALIZE_KERNEL_VALUE);
// Add the filter $imagick ->filter( $kernel );
// Show the output $imagick ->setImageFormat( 'png' );
header( "Content-Type: image/png" );
echo $imagick ->getImageBlob();
?> |
Output:
Reference: https://www.php.net/manual/en/imagickkernel.frombuiltin.php