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ImagickDraw::affine

(PECL imagick 2, PECL imagick 3)

ImagickDraw::affineAdjusts the current affine transformation matrix

Description

public ImagickDraw::affine(array $affine): bool
Warning

This function is currently not documented; only its argument list is available.

Adjusts the current affine transformation matrix with the specified affine transformation matrix.

Parameters

affine

Affine matrix parameters

Return Values

No value is returned.

Examples

Example #1 ImagickDraw::affine() example

<?php
function affine($strokeColor, $fillColor, $backgroundColor) {

$draw = new \ImagickDraw();

$draw->setStrokeWidth(1);
$draw->setStrokeOpacity(1);
$draw->setStrokeColor($strokeColor);
$draw->setFillColor($fillColor);

$draw->setStrokeWidth(2);

$PI = 3.141592653589794;
$angle = 60 * $PI / 360;

//Scale the drawing co-ordinates.
$affineScale = array("sx" => 1.75, "sy" => 1.75, "rx" => 0, "ry" => 0, "tx" => 0, "ty" => 0);

//Shear the drawing co-ordinates.
$affineShear = array("sx" => 1, "sy" => 1, "rx" => sin($angle), "ry" => -sin($angle), "tx" => 0, "ty" => 0);

//Rotate the drawing co-ordinates. The shear affine matrix
//produces incorrectly scaled drawings.
$affineRotate = array("sx" => cos($angle), "sy" => cos($angle), "rx" => sin($angle), "ry" => -sin($angle), "tx" => 0, "ty" => 0,);

//Translate (offset) the drawing
$affineTranslate = array("sx" => 1, "sy" => 1, "rx" => 0, "ry" => 0, "tx" => 30, "ty" => 30);

//The identiy affine matrix
$affineIdentity = array("sx" => 1, "sy" => 1, "rx" => 0, "ry" => 0, "tx" => 0, "ty" => 0);

$examples = [$affineScale, $affineShear, $affineRotate, $affineTranslate, $affineIdentity,];

$count = 0;

foreach (
$examples as $example) {
$draw->push();
$draw->translate(($count % 2) * 250, intval($count / 2) * 250);
$draw->translate(100, 100);
$draw->affine($example);
$draw->rectangle(-50, -50, 50, 50);
$draw->pop();
$count++;
}

//Create an image object which the draw commands can be rendered into
$image = new \Imagick();
$image->newImage(500, 750, $backgroundColor);
$image->setImageFormat("png");

//Render the draw commands in the ImagickDraw object
//into the image.
$image->drawImage($draw);

//Send the image to the browser
header("Content-Type: image/png");
echo
$image->getImageBlob();
}

?>

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