e2pdf / classes / model / e2pdf-signature.php

e2pdf-signature.php in E2Pdf – Export Pdf Tool for WordPress 1.08.06, at classes/model/e2pdf-signature.php

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1	<?php
2
3	/**
4	* E2pdf Signature Model
5	*
6	* @copyright Copyright 2017 https://e2pdf.com
7	* @license GPL v2
8	* @version 1
9	* @link https://e2pdf.com
10	* @since 1.00.10
11	*/
12	if (!defined('ABSPATH')) {
13	die('Access denied.');
14	}
15
16	class Model_E2pdf_Signature extends Model_E2pdf_Model {
17
18	public function ttf_signature($value, $size, $font, $options) {
19
20	$box = imagettfbbox($size, 0, $font, $value);
21
22	$min_x = min(array($box[0], $box[2], $box[4], $box[6]));
23	$max_x = max(array($box[0], $box[2], $box[4], $box[6]));
24	$min_y = min(array($box[1], $box[3], $box[5], $box[7]));
25	$max_y = max(array($box[1], $box[3], $box[5], $box[7]));
26
27	$box = array(
28	'x' => abs($min_x),
29	'y' => abs($min_y),
30	'width' => $max_x - $min_x,
31	'height' => $max_y - $min_y
32	);
33
34	$box = $this->ttf_box_fix($value, $box, $size, $font);
35
36	if ($box['width'] > 0 && $box['height'] > 0) {
37	$img = imagecreatetruecolor($box['width'], $box['height']);
38	if ($options['bgColour'] == 'transparent') {
39	imagealphablending($img, false);
40	imagesavealpha($img, true);
41	$bg = imagecolorallocatealpha($img, 0, 0, 0, 127);
42	} else {
43	$bg = imagecolorallocate($img, $options['bgColour'][0], $options['bgColour'][1], $options['bgColour'][2]);
44	}
45
46	$pen = imagecolorallocate($img, $options['penColour'][0], $options['penColour'][1], $options['penColour'][2]);
47	imagefill($img, 0, 0, $bg);
48	imagettftext($img, $size, 0, $box['x'], $box['y'], $pen, $font, $value);
49	ob_start();
50	imagepng($img);
51	$tmp_image = ob_get_contents();
52	ob_end_clean();
53	$value = base64_encode($tmp_image);
54	} else {
55	$value = '';
56	}
57
58	return $value;
59	}
60
61	/*
62	* https://github.com/unlocomqx/text-measure
63	*/
64
65	public function ttf_box_fix($value, $box, $size, $font) {
66
67	$img = $this->ttf_tmp($value, $box, $size, $font);
68
69	//top add
70	$top_line = true;
71	while ($top_line) {
72	$found = false;
73	$y = 1;
74	for ($x = 0; $x < $box['width']; $x++) {
75	$color = imagecolorat($img, $x, $y);
76	if ($color) {
77	$found = true;
78	break;
79	}
80	}
81	if (!$found) {
82	$top_line = false;
83	break;
84	} else {
85	$box['y'] ++;
86	$box['height'] ++;
87	imagedestroy($img);
88	$img = $this->ttf_tmp($value, $box, $size, $font);
89	}
90	}
91
92
93	//bottom add
94	$bottom_line = true;
95	while ($bottom_line) {
96	$found = false;
97	$y = $box['height'] - 1;
98	for ($x = 0; $x < $box['width']; $x++) {
99	$color = imagecolorat($img, $x, $y);
100	if ($color) {
101	$found = true;
102	break;
103	}
104	}
105	if (!$found) {
106	$bottom_line = false;
107	break;
108	} else {
109	$box['height'] ++;
110	imagedestroy($img);
111	$img = $this->ttf_tmp($value, $box, $size, $font);
112	}
113	}
114
115	//left add
116	$left_line = true;
117	while ($left_line) {
118	$found = false;
119	$x = 1;
120	for ($y = 0; $y < $box['height']; $y++) {
121	$color = imagecolorat($img, $x, $y);
122	if ($color) {
123	$found = true;
124	break;
125	}
126	}
127	if (!$found) {
128	$left_line = false;
129	break;
130	} else {
131	$box['x'] ++;
132	$box['width'] ++;
133	imagedestroy($img);
134	$img = $this->ttf_tmp($value, $box, $size, $font);
135	}
136	}
137
138	//right add
139	$right_line = true;
140	while ($right_line) {
141	$found = false;
142	$x = $box['width'] - 1;
143	for ($y = 0; $y < $box['height']; $y++) {
144	$color = imagecolorat($img, $x, $y);
145	if ($color) {
146	$found = true;
147	break;
148	}
149	}
150	if (!$found) {
151	$right_line = false;
152	break;
153	} else {
154	$box['width'] ++;
155	imagedestroy($img);
156	$img = $this->ttf_tmp($value, $box, $size, $font);
157	}
158	}
159
160	//top trim
161	$found = false;
162	for ($y = 0; $y < $box['height']; $y++) {
163	for ($x = 0; $x < $box['width']; $x++) {
164	$color = imagecolorat($img, $x, $y);
165	if ($color) {
166	$found = true;
167	break;
168	}
169	}
170	if (!$found) {
171	$box['y'] --;
172	$box['height'] --;
173	} else {
174	break;
175	}
176	}
177
178
179	//bottom trim
180	$found = false;
181	for ($y = $box['height'] - 1; $y >= 0; $y--) {
182	for ($x = 0; $x < $box['width']; $x++) {
183	$color = imagecolorat($img, $x, $y);
184	if ($color) {
185	$found = true;
186	break;
187	}
188	}
189	if (!$found) {
190	$box['height'] --;
191	} else {
192	break;
193	}
194	}
195
196
197
198	//left trim
199	$found = false;
200	for ($x = 0; $x < $box['width']; $x++) {
201	for ($y = 0; $y < $box['height']; $y++) {
202	$color = imagecolorat($img, $x, $y);
203	if ($color) {
204	$found = true;
205	break;
206	}
207	}
208	if (!$found) {
209	$box['x'] --;
210	$box['width'] --;
211	} else {
212	break;
213	}
214	}
215
216
217	//right trim
218	$found = false;
219	for ($x = $box['width'] - 1; $x >= 0; $x--) {
220	for ($y = 0; $y < $box['height']; $y++) {
221	$color = imagecolorat($img, $x, $y);
222	if ($color) {
223	$found = true;
224	break;
225	}
226	}
227	if (!$found) {
228	$box['width'] --;
229	} else {
230	break;
231	}
232	}
233	return $box;
234	}
235
236	public function ttf_tmp($value, $box, $size, $font) {
237	$img = imagecreatetruecolor($box['width'], $box['height']);
238	$black = imagecolorallocate($img, 0, 0, 0);
239	$red = imagecolorallocate($img, 255, 0, 0);
240	imagefill($img, 0, 0, $black);
241	imagettftext($img, $size, 0, (int) $box['x'], $box['y'], $red, $font, $value);
242	imagecolordeallocate($img, $black);
243	imagecolordeallocate($img, $red);
244	return $img;
245	}
246
247	}
248