98 lines
1.9 KiB
PHP
Executable File
98 lines
1.9 KiB
PHP
Executable File
<?php
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/**
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* This file is part of FPDI
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*
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* @package setasign\Fpdi
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* @copyright Copyright (c) 2026 Setasign GmbH & Co. KG (https://www.setasign.com)
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* @license http://opensource.org/licenses/mit-license The MIT License
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*/
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namespace setasign\Fpdi;
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use setasign\Fpdi\Math\Matrix;
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use setasign\Fpdi\Math\Vector;
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/**
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* A simple graphic state class which holds the current transformation matrix.
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*/
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class GraphicsState
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{
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/**
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* @var Matrix
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*/
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protected $ctm;
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/**
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* @param Matrix|null $ctm
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*/
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public function __construct(?Matrix $ctm = null)
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{
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if ($ctm === null) {
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$ctm = new Matrix();
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}
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$this->ctm = $ctm;
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}
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/**
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* @param Matrix $matrix
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* @return $this
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*/
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public function add(Matrix $matrix)
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{
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$this->ctm = $matrix->multiply($this->ctm);
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return $this;
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}
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/**
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* @param int|float $x
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* @param int|float $y
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* @param int|float $angle
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* @return $this
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*/
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public function rotate($x, $y, $angle)
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{
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if (\abs($angle) < 1e-5) {
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return $this;
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}
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$angle = \deg2rad($angle);
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$c = \cos($angle);
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$s = \sin($angle);
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$this->add(new Matrix($c, $s, -$s, $c, $x, $y));
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return $this->translate(-$x, -$y);
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}
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/**
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* @param int|float $shiftX
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* @param int|float $shiftY
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* @return $this
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*/
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public function translate($shiftX, $shiftY)
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{
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return $this->add(new Matrix(1, 0, 0, 1, $shiftX, $shiftY));
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}
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/**
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* @param int|float $scaleX
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* @param int|float $scaleY
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* @return $this
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*/
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public function scale($scaleX, $scaleY)
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{
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return $this->add(new Matrix($scaleX, 0, 0, $scaleY, 0, 0));
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}
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/**
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* @param Vector $vector
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* @return Vector
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*/
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public function toUserSpace(Vector $vector)
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{
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return $vector->multiplyWithMatrix($this->ctm);
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}
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}
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