PHP | ImagickDraw affine() Function

The ImagickDraw::affine() function is an inbuilt function in PHP which is used to adjust the current affine transformation matrix.

Syntax:

bool ImagickDraw::affine( array $affine )

Parameters: This function accepts a single parameter $affine which holds the array containing the affine matrix parameters.

Return Value: This function returns TRUE on success.

Exceptions: This function throws ImagickException on error.

Below given programs illustrate the ImagickDraw::affine() function in PHP:

Program 1:

<?php
// Create a new Imagick object
$imagick = new Imagick();

// Create a image on imagick object with
// green background
$imagick->newImage(800, 250, 'green');

// Create a new ImagickDraw object
$draw = new ImagickDraw();

// Translate the object
$draw->translate(100, 100);

// Apply the affine() function
$draw->affine(array("sx" => 7, "sy" => 1,
                    "rx" => 9, "ry" => 0,
                    "tx" => 200, "ty" => 0));

// Draw a rectangle
$draw->rectangle(-50, -50, 50, 50);

// Render the draw commands in the ImagickDraw object
$imagick->drawImage($draw);

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

Output:

Program 2:

<?php
//Create a new Imagick object
$imagick = new Imagick();

// Create a image on imagick object with
// purple background
$imagick->newImage(800, 250, 'purple');

// Create a new ImagickDraw object
$draw = new ImagickDraw();

// Translate the object
$draw->translate(100, 100);

// Apply the affine() function
$draw->affine(array("sx" => 2, "sy" => 1,
                    "rx" => 0, "ry" => 0,
                    "tx" => 0, "ty" => 0));

// Draw a rectangle
$draw->rectangle(0, -50, 50, 50);

// Draw a rectangle
$draw->rectangle(100, 50, 150, 100);

// Draw a rectangle
$draw->rectangle(200, -10, 250, 90);

//  Render the draw commands in the ImagickDraw object
$imagick->drawImage($draw);

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

Output:

Reference: https://www.php.net/manual/en/imagickdraw.affine.php