Proyectos de Subversion Moodle

Rev

| Ultima modificación | Ver Log |

Rev Autor Línea Nro. Línea
1 efrain 1 
<?php
2 
 
3 
/**
4 
 * This file is part of FPDI
5 
 *
6 
 * @package   setasign\Fpdi
7 
 * @copyright Copyright (c) 2023 Setasign GmbH & Co. KG (https://www.setasign.com)
8 
 * @license   http://opensource.org/licenses/mit-license The MIT License
9 
 */
10 
 
11 
namespace setasign\Fpdi;
12 
 
13 
use setasign\Fpdi\Math\Matrix;
14 
use setasign\Fpdi\Math\Vector;
15 
 
16 
/**
17 
 * A simple graphic state class which holds the current transformation matrix.
18 
 */
19 
class GraphicsState
20 
{
21 
    /**
22 
     * @var Matrix
23 
     */
24 
    protected $ctm;
25 
 
26 
    /**
27 
     * @param Matrix|null $ctm
28 
     */
29 
    public function __construct(Matrix $ctm = null)
30 
    {
31 
        if ($ctm === null) {
32 
            $ctm = new Matrix();
33 
        }
34 
 
35 
        $this->ctm = $ctm;
36 
    }
37 
 
38 
    /**
39 
     * @param Matrix $matrix
40 
     * @return $this
41 
     */
42 
    public function add(Matrix $matrix)
43 
    {
44 
        $this->ctm = $matrix->multiply($this->ctm);
45 
        return $this;
46 
    }
47 
 
48 
    /**
49 
     * @param int|float $x
50 
     * @param int|float $y
51 
     * @param int|float $angle
52 
     * @return $this
53 
     */
54 
    public function rotate($x, $y, $angle)
55 
    {
56 
        if (abs($angle) < 1e-5) {
57 
            return  $this;
58 
        }
59 
 
60 
        $angle = deg2rad($angle);
61 
        $c = cos($angle);
62 
        $s = sin($angle);
63 
 
64 
        $this->add(new Matrix($c, $s, -$s, $c, $x, $y));
65 
 
66 
        return $this->translate(-$x, -$y);
67 
    }
68 
 
69 
    /**
70 
     * @param int|float $shiftX
71 
     * @param int|float $shiftY
72 
     * @return $this
73 
     */
74 
    public function translate($shiftX, $shiftY)
75 
    {
76 
        return $this->add(new Matrix(1, 0, 0, 1, $shiftX, $shiftY));
77 
    }
78 
 
79 
    /**
80 
     * @param int|float $scaleX
81 
     * @param int|float $scaleY
82 
     * @return $this
83 
     */
84 
    public function scale($scaleX, $scaleY)
85 
    {
86 
        return $this->add(new Matrix($scaleX, 0, 0, $scaleY, 0, 0));
87 
    }
88 
 
89 
    /**
90 
     * @param Vector $vector
91 
     * @return Vector
92 
     */
93 
    public function toUserSpace(Vector $vector)
94 
    {
95 
        return $vector->multiplyWithMatrix($this->ctm);
96 
    }
97 
}