PHP 5.6.0beta1 released

Imagick::functionImage

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Imagick::functionImageApplies a function on the image

Descrierea

public bool Imagick::functionImage ( int $function , array $arguments [, int $channel = Imagick::CHANNEL_DEFAULT ] )

Applies an arithmetic, relational, or logical expression to a pseudo image.

See also » ImageMagick v6 Examples - Image Transformations — Function, Multi-Argument Evaluate

Această metodă este disponibilă dacă Imagick a fost compilat cu ImageMagick de versiunea 6.4.9 sau ulterior.

Parametri

function

Refer to this list of function constants

arguments

Array of arguments to pass to this function.

Valorile întoarse

Întoarce TRUE în caz de succes.

Erori/Excepții

Emite ImagickException în caz de eroare.

Exemple

Example #1 Create a sinusoidal gradient

<?php
$imagick 
= new Imagick();
$imagick->newPseudoImage(200200'gradient:black-white');
$arguments = array(3, -90);
$imagick->functionImage(Imagick::FUNCTION_SINUSOID$arguments);

header("Content-Type: image/png");
$imagick->setImageFormat("png");
echo 
$imagick->getImageBlob();
?>

Exemplul de mai sus va afișa ceva similar cu:

Output of create a sinusoidal gradient

Example #2 Create a gradient from the polynomial (4x^2 - 4x + 1)

<?php
$imagick 
= new Imagick();
$imagick->newPseudoImage(200200'gradient:black-white');
$arguments = array(4, -41);
$imagick->functionImage(Imagick::FUNCTION_POLYNOMIAL$arguments);

header("Content-Type: image/png");
$imagick->setimageformat("png");
echo 
$imagick->getImageBlob();
?>

Exemplul de mai sus va afișa ceva similar cu:

Output of create a polynomial gradient

Example #3 Create a complex gradient from the polynomial (4x^2 - 4x^2 + 1) modulated by a sinusoidal gradient

<?php
$imagick1 
= new Imagick();
$imagick1->newPseudoImage(200200'gradient:black-white');
$arguments = array(9, -90);
$imagick1->functionImage(Imagick::FUNCTION_SINUSOID$arguments);

$imagick2 = new Imagick();
$imagick2->newPseudoImage(200200'gradient:black-white');
$arguments = array(0.50);
$imagick2->functionImage(Imagick::FUNCTION_SINUSOID$arguments);
$imagick1->compositeimage($imagick2Imagick::COMPOSITE_MULTIPLY00);

header("Content-Type: image/png");
$imagick1->setImageFormat("png");
echo 
$imagick1->getImageBlob();
?>

Exemplul de mai sus va afișa ceva similar cu:

Output of create complex gradient

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