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1 | <?php |
2 | |
3 | /** |
4 | * Abstract cover text layer |
5 | * |
6 | * PHP version 8 |
7 | * |
8 | * Copyright (C) Villanova University 2018. |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify |
11 | * it under the terms of the GNU General Public License version 2, |
12 | * as published by the Free Software Foundation. |
13 | * |
14 | * This program is distributed in the hope that it will be useful, |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
17 | * GNU General Public License for more details. |
18 | * |
19 | * You should have received a copy of the GNU General Public License |
20 | * along with this program; if not, write to the Free Software |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
22 | * |
23 | * @category VuFind |
24 | * @package Cover_Generator |
25 | * @author Demian Katz <demian.katz@villanova.edu> |
26 | * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License |
27 | * @link https://vufind.org/wiki/development:plugins:hierarchy_components Wiki |
28 | */ |
29 | |
30 | namespace VuFind\Cover\Layer; |
31 | |
32 | /** |
33 | * Abstract cover text layer |
34 | * |
35 | * @category VuFind |
36 | * @package Cover_Generator |
37 | * @author Demian Katz <demian.katz@villanova.edu> |
38 | * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License |
39 | * @link https://vufind.org/wiki/development:plugins:hierarchy_components Wiki |
40 | */ |
41 | abstract class AbstractTextLayer extends AbstractLayer |
42 | { |
43 | /** |
44 | * Returns the width a string would render to |
45 | * |
46 | * @param string $text Text to test |
47 | * @param string $font Full font path |
48 | * @param string $size Size of the font |
49 | * |
50 | * @return int |
51 | */ |
52 | protected function textWidth($text, $font, $size) |
53 | { |
54 | $p = imagettfbbox($size, 0, $font, $text); |
55 | return $p[2] - $p[0]; |
56 | } |
57 | |
58 | /** |
59 | * Returns the height a string would render to |
60 | * |
61 | * @param string $text Text to test |
62 | * @param string $font Full font path |
63 | * @param string $size Size of the font |
64 | * |
65 | * @return int |
66 | */ |
67 | protected function textHeight($text, $font, $size) |
68 | { |
69 | $p = imagettfbbox($size, 0, $font, $text); |
70 | return $p[1] - $p[5]; |
71 | } |
72 | |
73 | /** |
74 | * Simulate outlined text |
75 | * |
76 | * @param resource $im Active image resource |
77 | * @param object $settings Generator settings object |
78 | * @param string $text Text to render |
79 | * @param int $y Top position |
80 | * @param string $font Full path to font |
81 | * @param int $fontSize Size of the font |
82 | * @param int $mcolor Main text color |
83 | * @param int $scolor Secondary border color |
84 | * @param string $align 'left','center','right' |
85 | * |
86 | * @return void |
87 | */ |
88 | protected function drawText( |
89 | $im, |
90 | $settings, |
91 | $text, |
92 | $y, |
93 | $font, |
94 | $fontSize, |
95 | $mcolor, |
96 | $scolor = false, |
97 | $align = null |
98 | ) { |
99 | // In case the text contains non-normalized UTF-8, fix that for proper |
100 | // display: |
101 | $text = \Normalizer::normalize($text); |
102 | |
103 | // If the wrap width is smaller than the image width, we want to account |
104 | // for this when right or left aligning to maintain padding on the image. |
105 | $wrapGap = (int)(($settings->width - $settings->wrapWidth) / 2); |
106 | |
107 | $textWidth = $this->textWidth($text, $font, $fontSize); |
108 | if ($textWidth > $settings->width) { |
109 | $align = 'left'; |
110 | $wrapGap = 0; // kill wrap gap to maximize text fit |
111 | } |
112 | switch ($align ?? $settings->textAlign) { |
113 | case 'left': |
114 | $x = $wrapGap; |
115 | break; |
116 | case 'right': |
117 | $x = $settings->width - ($textWidth + $wrapGap); |
118 | break; |
119 | case 'center': |
120 | default: |
121 | $x = (int)(($settings->width - $textWidth) / 2); |
122 | } |
123 | |
124 | // Generate 5 lines of text, 4 offset in a border color |
125 | if ($scolor) { |
126 | imagettftext($im, $fontSize, 0, $x, $y + 1, $scolor, $font, $text); |
127 | imagettftext($im, $fontSize, 0, $x, $y - 1, $scolor, $font, $text); |
128 | imagettftext($im, $fontSize, 0, $x + 1, $y, $scolor, $font, $text); |
129 | imagettftext($im, $fontSize, 0, $x - 1, $y, $scolor, $font, $text); |
130 | } |
131 | // 1 centered in main color |
132 | imagettftext($im, $fontSize, 0, $x, (int)$y, $mcolor, $font, $text); |
133 | } |
134 | } |