e2pdf / classes / model / e2pdf-signature.php

e2pdf-signature.php in E2Pdf – Export Pdf Tool for WordPress 1.32.49, at classes/model/e2pdf-signature.php

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1	<?php
2
3	/**
4	* File: /model/e2pdf-signature.php
5	*
6	* @package E2Pdf
7	* @license GPLv3
8	* @link https://e2pdf.com
9	*/
10	if (!defined('ABSPATH')) {
11	die('Access denied.');
12	}
13
14	class Model_E2pdf_Signature extends Model_E2pdf_Model {
15
16	public function ttf_signature($value, $options) {
17
18	$response = '';
19
20	if ($value && trim($value) != '' && extension_loaded('gd') && function_exists('imagettftext')) {
21
22	$value = $this->helper->load('rtl')->rtl($value);
23
24	$box = imagettfbbox($options['fontSize'], 0, $options['font'], $value);
25
26	$min_x = min(array($box[0], $box[2], $box[4], $box[6]));
27	$max_x = max(array($box[0], $box[2], $box[4], $box[6]));
28	$min_y = min(array($box[1], $box[3], $box[5], $box[7]));
29	$max_y = max(array($box[1], $box[3], $box[5], $box[7]));
30
31	$box = array(
32	'x' => abs($min_x),
33	'y' => abs($min_y),
34	'width' => $max_x - $min_x,
35	'height' => $max_y - $min_y,
36	);
37
38	$box = $this->ttf_box_fix($value, $box, $options['fontSize'], $options['font']);
39
40	if ($box['width'] > 0 && $box['height'] > 0) {
41	$img = imagecreatetruecolor($box['width'], $box['height']);
42	if ($options['bgColour'] == 'transparent') {
43	imagealphablending($img, false);
44	imagesavealpha($img, true);
45	$bg = imagecolorallocatealpha($img, 0, 0, 0, 127);
46	} else {
47	$bg = imagecolorallocate($img, $options['bgColour'][0], $options['bgColour'][1], $options['bgColour'][2]);
48	}
49
50	$pen = imagecolorallocate($img, $options['penColour'][0], $options['penColour'][1], $options['penColour'][2]);
51	imagefill($img, 0, 0, $bg);
52	imagettftext($img, $options['fontSize'], 0, $box['x'], $box['y'], $pen, $options['font'], $value);
53	ob_start();
54	imagepng($img);
55	$tmp_image = ob_get_contents();
56	ob_end_clean();
57	// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
58	$response = base64_encode($tmp_image);
59	}
60	}
61
62	return $response;
63	}
64
65	/*
66	* https://github.com/unlocomqx/text-measure
67	*/
68
69	public function ttf_box_fix($value, $box, $size, $font) {
70
71	$img = $this->ttf_tmp($value, $box, $size, $font);
72
73	$top_line = true;
74	while ($top_line) {
75	$found = false;
76	$y = 1;
77	for ($x = 0; $x < $box['width']; $x++) {
78	$color = imagecolorat($img, $x, $y);
79	if ($color) {
80	$found = true;
81	break;
82	}
83	}
84	if (!$found) {
85	$top_line = false;
86	break;
87	} else {
88	$box['y']++;
89	$box['height']++;
90	imagedestroy($img);
91	$img = $this->ttf_tmp($value, $box, $size, $font);
92	}
93	}
94
95	$bottom_line = true;
96	while ($bottom_line) {
97	$found = false;
98	$y = $box['height'] - 1;
99	for ($x = 0; $x < $box['width']; $x++) {
100	$color = imagecolorat($img, $x, $y);
101	if ($color) {
102	$found = true;
103	break;
104	}
105	}
106	if (!$found) {
107	$bottom_line = false;
108	break;
109	} else {
110	$box['height']++;
111	imagedestroy($img);
112	$img = $this->ttf_tmp($value, $box, $size, $font);
113	}
114	}
115
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	$right_line = true;
139	while ($right_line) {
140	$found = false;
141	$x = $box['width'] - 1;
142	for ($y = 0; $y < $box['height']; $y++) {
143	$color = imagecolorat($img, $x, $y);
144	if ($color) {
145	$found = true;
146	break;
147	}
148	}
149	if (!$found) {
150	$right_line = false;
151	break;
152	} else {
153	$box['width']++;
154	imagedestroy($img);
155	$img = $this->ttf_tmp($value, $box, $size, $font);
156	}
157	}
158
159	$found = false;
160	for ($y = 0; $y < $box['height']; $y++) {
161	for ($x = 0; $x < $box['width']; $x++) {
162	$color = imagecolorat($img, $x, $y);
163	if ($color) {
164	$found = true;
165	break;
166	}
167	}
168	if (!$found) {
169	$box['y']--;
170	$box['height']--;
171	} else {
172	break;
173	}
174	}
175
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	$found = false;
193	for ($x = 0; $x < $box['width']; $x++) {
194	for ($y = 0; $y < $box['height']; $y++) {
195	$color = imagecolorat($img, $x, $y);
196	if ($color) {
197	$found = true;
198	break;
199	}
200	}
201	if (!$found) {
202	$box['x']--;
203	$box['width']--;
204	} else {
205	break;
206	}
207	}
208
209	$found = false;
210	for ($x = $box['width'] - 1; $x >= 0; $x--) {
211	for ($y = 0; $y < $box['height']; $y++) {
212	$color = imagecolorat($img, $x, $y);
213	if ($color) {
214	$found = true;
215	break;
216	}
217	}
218	if (!$found) {
219	$box['width']--;
220	} else {
221	break;
222	}
223	}
224	return $box;
225	}
226
227	public function ttf_tmp($value, $box, $size, $font) {
228	$img = imagecreatetruecolor($box['width'], $box['height']);
229	$black = imagecolorallocate($img, 0, 0, 0);
230	$red = imagecolorallocate($img, 255, 0, 0);
231	imagefill($img, 0, 0, $black);
232	imagettftext($img, $size, 0, (int) $box['x'], $box['y'], $red, $font, $value);
233	imagecolordeallocate($img, $black);
234	imagecolordeallocate($img, $red);
235	return $img;
236	}
237
238	public function j_signature($value, $options = array()) {
239
240	$response = '';
241
242	$value = str_replace('image/jsignature;base30,', '', $value);
243	$a = $this->helper->load('jSignature')->Base64ToNative($value);
244
245	$width = 0;
246	$height = 0;
247
248	foreach ($a as $line) {
249	if (max($line ['x']) > $width) {
250	$width = max($line ['x']);
251	}
252	if (max($line ['y']) > $height) {
253	$height = max($line ['y']);
254	}
255	}
256
257	$img = imagecreatetruecolor($width, $height);
258
259	if ($options['bgColour'] == 'transparent') {
260	imagealphablending($img, false);
261	imagesavealpha($img, true);
262	$bg = imagecolorallocatealpha($img, 0, 0, 0, 127);
263	} else {
264	$bg = imagecolorallocate($img, $options['bgColour'][0], $options['bgColour'][1], $options['bgColour'][2]);
265	}
266
267	imagefill($img, 0, 0, $bg);
268	imagesetthickness($img, 5);
269
270	$pen = imagecolorallocate($img, $options['penColour'][0], $options['penColour'][1], $options['penColour'][2]);
271
272	// phpcs:ignore Generic.CodeAnalysis.ForLoopWithTestFunctionCall.NotAllowed, Squiz.PHP.DisallowSizeFunctionsInLoops.Found
273	for ($i = 0; $i < count($a); $i++) {
274	// phpcs:ignore Generic.CodeAnalysis.ForLoopWithTestFunctionCall.NotAllowed, Squiz.PHP.DisallowSizeFunctionsInLoops.Found
275	for ($j = 0; $j < count($a[$i]['x']); $j++) {
276	if (!isset($a[$i]['x'][$j])) {
277	break;
278	}
279	if (!isset($a[$i]['x'][$j + 1])) {
280	imagesetpixel($img, $a[$i]['x'][$j], $a[$i]['y'][$j], $pen);
281	} else {
282	imageline($img, $a[$i]['x'][$j], $a[$i]['y'][$j], $a[$i]['x'][$j + 1], $a[$i]['y'][$j + 1], $pen);
283	}
284	}
285	}
286
287	$tmp_image = $this->j_signature_trimbox($img);
288	imagedestroy($img);
289
290	if ($tmp_image) {
291	// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
292	$response = base64_encode($tmp_image);
293	}
294
295	return $response;
296	}
297
298	public function j_signature_trimbox($img = false) {
299	if (!$img) {
300	return '';
301	}
302
303	if (is_string($img)) {
304	$img = imagecreatefrompng($img);
305	}
306
307	$width = imagesx($img);
308	$height = imagesy($img);
309
310	$top = 0;
311	$bottom = 0;
312	$left = 0;
313	$right = 0;
314
315	$bgcolor = imagecolorat($img, $top, $left);
316	for (; $top < $height; ++$top) {
317	for ($x = 0; $x < $width; ++$x) {
318	if (imagecolorat($img, $x, $top) != $bgcolor) {
319	break 2;
320	}
321	}
322	}
323
324	for (; $bottom < $height; ++$bottom) {
325	for ($x = 0; $x < $width; ++$x) {
326	if (imagecolorat($img, $x, $height - $bottom - 1) != $bgcolor) {
327	break 2;
328	}
329	}
330	}
331
332	for (; $left < $width; ++$left) {
333	for ($y = 0; $y < $height; ++$y) {
334	if (imagecolorat($img, $left, $y) != $bgcolor) {
335	break 2;
336	}
337	}
338	}
339
340	for (; $right < $width; ++$right) {
341	for ($y = 0; $y < $height; ++$y) {
342	if (imagecolorat($img, $width - $right - 1, $y) != $bgcolor) {
343	break 2;
344	}
345	}
346	}
347
348	$newimg = imagecreate($width - ($left + $right), $height - ($top + $bottom));
349	imagecopy($newimg, $img, 0, 0, $left, $top, imagesx($newimg), imagesy($newimg));
350
351	ob_start();
352	imagepng($newimg);
353	$imagedata = ob_get_contents();
354	ob_end_clean();
355
356	return $imagedata;
357	}
358	}
359