e2pdf / classes / model / e2pdf-signature.php

e2pdf-signature.php in E2Pdf – Export Pdf Tool for WordPress 1.01.01, at classes/model/e2pdf-signature.php

244 lines 6.8 KB

Raw Download Zip

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	$img = imagecreatetruecolor($box['width'], $box['height']);
37	if ($options['bgColour'] == 'transparent') {
38	imagealphablending($img, false);
39	imagesavealpha($img, true);
40	$bg = imagecolorallocatealpha($img, 0, 0, 0, 127);
41	} else {
42	$bg = imagecolorallocate($img, $options['bgColour'][0], $options['bgColour'][1], $options['bgColour'][2]);
43	}
44
45	$pen = imagecolorallocate($img, $options['penColour'][0], $options['penColour'][1], $options['penColour'][2]);
46	imagefill($img, 0, 0, $bg);
47	imagettftext($img, $size, 0, $box['x'], $box['y'], $pen, $font, $value);
48	ob_start();
49	imagepng($img);
50	$tmp_image = ob_get_contents();
51	ob_end_clean();
52	$value = base64_encode($tmp_image);
53
54	return $value;
55	}
56
57	/*
58	* https://github.com/unlocomqx/text-measure
59	*/
60
61	public function ttf_box_fix($value, $box, $size, $font) {
62
63	$img = $this->ttf_tmp($value, $box, $size, $font);
64
65	//top add
66	$top_line = true;
67	while ($top_line) {
68	$found = false;
69	$y = 1;
70	for ($x = 0; $x < $box['width']; $x++) {
71	$color = imagecolorat($img, $x, $y);
72	if ($color) {
73	$found = true;
74	break;
75	}
76	}
77	if (!$found) {
78	$top_line = false;
79	break;
80	} else {
81	$box['y'] ++;
82	$box['height'] ++;
83	imagedestroy($img);
84	$img = $this->ttf_tmp($value, $box, $size, $font);
85	}
86	}
87
88
89	//bottom add
90	$bottom_line = true;
91	while ($bottom_line) {
92	$found = false;
93	$y = $box['height'] - 1;
94	for ($x = 0; $x < $box['width']; $x++) {
95	$color = imagecolorat($img, $x, $y);
96	if ($color) {
97	$found = true;
98	break;
99	}
100	}
101	if (!$found) {
102	$bottom_line = false;
103	break;
104	} else {
105	$box['height'] ++;
106	imagedestroy($img);
107	$img = $this->ttf_tmp($value, $box, $size, $font);
108	}
109	}
110
111	//left add
112	$left_line = true;
113	while ($left_line) {
114	$found = false;
115	$x = 1;
116	for ($y = 0; $y < $box['height']; $y++) {
117	$color = imagecolorat($img, $x, $y);
118	if ($color) {
119	$found = true;
120	break;
121	}
122	}
123	if (!$found) {
124	$left_line = false;
125	break;
126	} else {
127	$box['x'] ++;
128	$box['width'] ++;
129	imagedestroy($img);
130	$img = $this->ttf_tmp($value, $box, $size, $font);
131	}
132	}
133
134	//right add
135	$right_line = true;
136	while ($right_line) {
137	$found = false;
138	$x = $box['width'] - 1;
139	for ($y = 0; $y < $box['height']; $y++) {
140	$color = imagecolorat($img, $x, $y);
141	if ($color) {
142	$found = true;
143	break;
144	}
145	}
146	if (!$found) {
147	$right_line = false;
148	break;
149	} else {
150	$box['width'] ++;
151	imagedestroy($img);
152	$img = $this->ttf_tmp($value, $box, $size, $font);
153	}
154	}
155
156	//top trim
157	$found = false;
158	for ($y = 0; $y < $box['height']; $y++) {
159	for ($x = 0; $x < $box['width']; $x++) {
160	$color = imagecolorat($img, $x, $y);
161	if ($color) {
162	$found = true;
163	break;
164	}
165	}
166	if (!$found) {
167	$box['y'] --;
168	$box['height'] --;
169	} else {
170	break;
171	}
172	}
173
174
175	//bottom trim
176	$found = false;
177	for ($y = $box['height'] - 1; $y >= 0; $y--) {
178	for ($x = 0; $x < $box['width']; $x++) {
179	$color = imagecolorat($img, $x, $y);
180	if ($color) {
181	$found = true;
182	break;
183	}
184	}
185	if (!$found) {
186	$box['height'] --;
187	} else {
188	break;
189	}
190	}
191
192
193
194	//left trim
195	$found = false;
196	for ($x = 0; $x < $box['width']; $x++) {
197	for ($y = 0; $y < $box['height']; $y++) {
198	$color = imagecolorat($img, $x, $y);
199	if ($color) {
200	$found = true;
201	break;
202	}
203	}
204	if (!$found) {
205	$box['x'] --;
206	$box['width'] --;
207	} else {
208	break;
209	}
210	}
211
212
213	//right trim
214	$found = false;
215	for ($x = $box['width'] - 1; $x >= 0; $x--) {
216	for ($y = 0; $y < $box['height']; $y++) {
217	$color = imagecolorat($img, $x, $y);
218	if ($color) {
219	$found = true;
220	break;
221	}
222	}
223	if (!$found) {
224	$box['width'] --;
225	} else {
226	break;
227	}
228	}
229	return $box;
230	}
231
232	public function ttf_tmp($value, $box, $size, $font) {
233	$img = imagecreatetruecolor($box['width'], $box['height']);
234	$black = imagecolorallocate($img, 0, 0, 0);
235	$red = imagecolorallocate($img, 255, 0, 0);
236	imagefill($img, 0, 0, $black);
237	imagettftext($img, $size, 0, (int) $box['x'], $box['y'], $red, $font, $value);
238	imagecolordeallocate($img, $black);
239	imagecolordeallocate($img, $red);
240	return $img;
241	}
242
243	}
244