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<?php
/**
* This file is part of FPDI
*
* @package setasign\Fpdi
* @copyright Copyright (c) 2024 Setasign GmbH & Co. KG (https://www.setasign.com)
* @license http://opensource.org/licenses/mit-license The MIT License
*/
namespace setasign\Fpdi;
use setasign\Fpdi\Math\Matrix;
use setasign\Fpdi\Math\Vector;
/**
* A simple graphic state class which holds the current transformation matrix.
*/
class GraphicsState
{
/**
* @var Matrix
*/
protected $ctm;
/**
* @param Matrix|null $ctm
*/
public function __construct(?Matrix $ctm = null)
{
if ($ctm === null) {
$ctm = new Matrix();
}
$this->ctm = $ctm;
}
/**
* @param Matrix $matrix
* @return $this
*/
public function add(Matrix $matrix)
{
$this->ctm = $matrix->multiply($this->ctm);
return $this;
}
/**
* @param int|float $x
* @param int|float $y
* @param int|float $angle
* @return $this
*/
public function rotate($x, $y, $angle)
{
if (abs($angle) < 1e-5) {
return $this;
}
$angle = deg2rad($angle);
$c = cos($angle);
$s = sin($angle);
$this->add(new Matrix($c, $s, -$s, $c, $x, $y));
return $this->translate(-$x, -$y);
}
/**
* @param int|float $shiftX
* @param int|float $shiftY
* @return $this
*/
public function translate($shiftX, $shiftY)
{
return $this->add(new Matrix(1, 0, 0, 1, $shiftX, $shiftY));
}
/**
* @param int|float $scaleX
* @param int|float $scaleY
* @return $this
*/
public function scale($scaleX, $scaleY)
{
return $this->add(new Matrix($scaleX, 0, 0, $scaleY, 0, 0));
}
/**
* @param Vector $vector
* @return Vector
*/
public function toUserSpace(Vector $vector)
{
return $vector->multiplyWithMatrix($this->ctm);
}
}
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