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lib/phpqrcode/qrmask.php (6 issues)

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<?php
/*
 * PHP QR Code encoder
 *
 * Masking
 *
 * Based on libqrencode C library distributed under LGPL 2.1
 * Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <[email protected]>
 *
 * PHP QR Code is distributed under LGPL 3
 * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */
 
    define('N1', 3);
    define('N2', 3);
    define('N3', 40);
    define('N4', 10);

    class QRmask {
	
        public $runLength = array();
		
        //----------------------------------------------------------------------
        public function __construct() 
        {
            $this->runLength = array_fill(0, QRSPEC_WIDTH_MAX + 1, 0);
        }
        
        //----------------------------------------------------------------------
        public function writeFormatInformation($width, &$frame, $mask, $level)
        {
            $blacks = 0;
            $format = QRspec::getFormatInfo($mask, $level);

            for ($i = 0; $i < 8; $i++) {
                if ($format & 1) {
                    $blacks += 2;
                    $v = 0x85;
                } else {
                    $v = 0x84;
                }
                
                $frame[8][$width - 1 - $i] = chr($v);
                if ($i < 6) {
                    $frame[$i][8] = chr($v);
                } else {
                    $frame[$i + 1][8] = chr($v);
                }
                $format = $format >> 1;
            }
            
            for ($i = 0; $i < 7; $i++) {
                if ($format & 1) {
                    $blacks += 2;
                    $v = 0x85;
                } else {
                    $v = 0x84;
                }
                
                $frame[$width - 7 + $i][8] = chr($v);
                if ($i == 0) {
                    $frame[8][7] = chr($v);
                } else {
                    $frame[8][6 - $i] = chr($v);
                }
                
                $format = $format >> 1;
            }

            return $blacks;
        }
        
        //----------------------------------------------------------------------
        public function mask0($x, $y) { return ($x + $y) & 1; }
        public function mask1($x, $y) { return ($y & 1); }
        public function mask2($x, $y) { return ($x % 3); }
        public function mask3($x, $y) { return ($x + $y) % 3; }
        public function mask4($x, $y) { return (((int) ($y / 2)) + ((int) ($x / 3))) & 1; }
        public function mask5($x, $y) { return (($x * $y) & 1) + ($x * $y) % 3; }
        public function mask6($x, $y) { return ((($x * $y) & 1) + ($x * $y) % 3) & 1; }
        public function mask7($x, $y) { return ((($x * $y) % 3) + (($x + $y) & 1)) & 1; }
        
        //----------------------------------------------------------------------
        private function generateMaskNo($maskNo, $width, $frame)
        {
            $bitMask = array_fill(0, $width, array_fill(0, $width, 0));
            
            for ($y = 0; $y < $width; $y++) {
                for ($x = 0; $x < $width; $x++) {
                    if (ord($frame[$y][$x]) & 0x80) {
                        $bitMask[$y][$x] = 0;
                    } else {
                        $maskFunc = call_user_func(array($this, 'mask'.$maskNo), $x, $y);
                        $bitMask[$y][$x] = ($maskFunc == 0) ? 1 : 0;
                    }
                    
                }
            }
            
            return $bitMask;
        }
        
        //----------------------------------------------------------------------
        public static function serial($bitFrame)
        {
            $codeArr = array();
            
            foreach ($bitFrame as $line) {
                            $codeArr[] = join('', $line);
            }
                
            return gzcompress(join("\n", $codeArr), 9);
        }
        
        //----------------------------------------------------------------------
        public static function unserial($code)
        {
            $codeArr = array();
            
            $codeLines = explode("\n", gzuncompress($code));
            foreach ($codeLines as $line) {
                            $codeArr[] = str_split($line);
            }
            
            return $codeArr;
        }
        
        //----------------------------------------------------------------------
        public function makeMaskNo($maskNo, $width, $s, &$d, $maskGenOnly = false) 
        {
            $b = 0;
            $bitMask = array();
            
            $fileName = QR_CACHE_DIR.'mask_'.$maskNo.DIRECTORY_SEPARATOR.'mask_'.$width.'_'.$maskNo.'.dat';

            if (QR_CACHEABLE) {
                if (file_exists($fileName)) {
                    $bitMask = self::unserial(file_get_contents($fileName));
                } else {
                    $bitMask = $this->generateMaskNo($maskNo, $width, $s);
                    if (!file_exists(QR_CACHE_DIR.'mask_'.$maskNo)) {
                                            mkdir(QR_CACHE_DIR.'mask_'.$maskNo);
                    }
                    file_put_contents($fileName, self::serial($bitMask));
                }
            } else {
                $bitMask = $this->generateMaskNo($maskNo, $width, $s);
            }

            if ($maskGenOnly) {
                            return;
            }
                
            $d = $s;

            for ($y = 0; $y < $width; $y++) {
                for ($x = 0; $x < $width; $x++) {
                    if ($bitMask[$y][$x] == 1) {
                        $d[$y][$x] = chr(ord($s[$y][$x]) ^ (int) $bitMask[$y][$x]);
                    }
                    $b += (int) (ord($d[$y][$x]) & 1);
                }
            }

            return $b;
        }
        
        //----------------------------------------------------------------------
        public function makeMask($width, $frame, $maskNo, $level)
        {
            $masked = array_fill(0, $width, str_repeat("\0", $width));
            $this->makeMaskNo($maskNo, $width, $frame, $masked);
            $this->writeFormatInformation($width, $masked, $maskNo, $level);
       
            return $masked;
        }
        
        //----------------------------------------------------------------------
        public function calcN1N3($length)
        {
            $demerit = 0;

            for ($i = 0; $i < $length; $i++) {
                
                if ($this->runLength[$i] >= 5) {
                    $demerit += (N1 + ($this->runLength[$i] - 5));
                }
                if ($i & 1) {
                    if (($i >= 3) && ($i < ($length - 2)) && ($this->runLength[$i] % 3 == 0)) {
                        $fact = (int) ($this->runLength[$i] / 3);
                        if (($this->runLength[$i - 2] == $fact) &&
                           ($this->runLength[$i - 1] == $fact) &&
                           ($this->runLength[$i + 1] == $fact) &&
                           ($this->runLength[$i + 2] == $fact)) {
                            if (($this->runLength[$i - 3] < 0) || ($this->runLength[$i - 3] >= (4 * $fact))) {
                                $demerit += N3;
                            } else if ((($i + 3) >= $length) || ($this->runLength[$i + 3] >= (4 * $fact))) {
                                $demerit += N3;
                            }
                        }
                    }
                }
            }
            return $demerit;
        }
        
        //----------------------------------------------------------------------
        public function evaluateSymbol($width, $frame)
        {
            $head = 0;
            $demerit = 0;

            for ($y = 0; $y < $width; $y++) {
                $head = 0;
                $this->runLength[0] = 1;
                
                $frameY = $frame[$y];
                
                if ($y > 0) {
                                    $frameYM = $frame[$y - 1];
                }
                
                for ($x = 0; $x < $width; $x++) {
                    if (($x > 0) && ($y > 0)) {
                        $b22 = ord($frameY[$x]) & ord($frameY[$x - 1]) & ord($frameYM[$x]) & ord($frameYM[$x - 1]);

                        $w22 = ord($frameY[$x]) | ord($frameY[$x - 1]) | ord($frameYM[$x]) | ord($frameYM[$x - 1]);
                        
                        if (($b22 | ($w22 ^ 1)) & 1) {                                                                     
                            $demerit += N2;
                        }
                    }
                    if (($x == 0) && (ord($frameY[$x]) & 1)) {
                        $this->runLength[0] = -1;
                        $head = 1;
                        $this->runLength[$head] = 1;
                    } else if ($x > 0) {
                        if ((ord($frameY[$x]) ^ ord($frameY[$x - 1])) & 1) {
                            $head++;
                            $this->runLength[$head] = 1;
                        } else {
                            $this->runLength[$head]++;
                        }
                    }
                }
    
                $demerit += $this->calcN1N3($head + 1);
            }

            for ($x = 0; $x < $width; $x++) {
                $head = 0;
                $this->runLength[0] = 1;
                
                for ($y = 0; $y < $width; $y++) {
                    if ($y == 0 && (ord($frame[$y][$x]) & 1)) {
                        $this->runLength[0] = -1;
                        $head = 1;
                        $this->runLength[$head] = 1;
                    } else if ($y > 0) {
                        if ((ord($frame[$y][$x]) ^ ord($frame[$y - 1][$x])) & 1) {
                            $head++;
                            $this->runLength[$head] = 1;
                        } else {
                            $this->runLength[$head]++;
                        }
                    }
                }
            
                $demerit += $this->calcN1N3($head + 1);
            }

            return $demerit;
        }
        
        
        //----------------------------------------------------------------------
        public function mask($width, $frame, $level)
        {
            $minDemerit = PHP_INT_MAX;
            $bestMaskNum = 0;

            $bestMask = array();

            
            $checked_masks = array(0, 1, 2, 3, 4, 5, 6, 7);
            
            if (QR_FIND_FROM_RANDOM !== false) {

            
                $howManuOut = 8 - (QR_FIND_FROM_RANDOM % 9);
                for ($i = 0; $i < $howManuOut; $i++) {
                    $remPos = rand(0, count($checked_masks) - 1);
                    unset($checked_masks[$remPos]);
                    $checked_masks = array_values($checked_masks);
                }
            
            }
            
            $bestMask = $frame;
             
            foreach ($checked_masks as $i) {
                $mask = array_fill(0, $width, str_repeat("\0", $width));

                $demerit = 0;

                $blacks = 0;

                $blacks  = $this->makeMaskNo($i, $width, $frame, $mask);
                $blacks += $this->writeFormatInformation($width, $mask, $i, $level);
                $blacks  = (int) (100 * $blacks / ($width * $width));
                $demerit = (int) ((int) (abs($blacks - 50) / 5) * N4);
                $demerit += $this->evaluateSymbol($width, $mask);
                
                if ($demerit < $minDemerit) {
                    $minDemerit = $demerit;
                    $bestMask = $mask;
                    $bestMaskNum = $i;
                }
            }
            
            return $bestMask;
        }
        
        //----------------------------------------------------------------------
    }


1			<?php
2			/*
3			* PHP QR Code encoder
4			*
5			* Masking
6			*
7			* Based on libqrencode C library distributed under LGPL 2.1
8			* Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <[email protected]>
9			*
10			* PHP QR Code is distributed under LGPL 3
11			* Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>
12			*
13			* This library is free software; you can redistribute it and/or
14			* modify it under the terms of the GNU Lesser General Public
15			* License as published by the Free Software Foundation; either
16			* version 3 of the License, or any later version.
17			*
18			* This library is distributed in the hope that it will be useful,
19			* but WITHOUT ANY WARRANTY; without even the implied warranty of
20			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21			* Lesser General Public License for more details.
22			*
23			* You should have received a copy of the GNU Lesser General Public
24			* License along with this library; if not, write to the Free Software
25			* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
26			*/
27
28			define('N1', 3);
29			define('N2', 3);
30			define('N3', 40);
31			define('N4', 10);
32
33			class QRmask {
34
35			public $runLength = array();
36
37			//----------------------------------------------------------------------
38			public function __construct()
39			{
40			$this->runLength = array_fill(0, QRSPEC_WIDTH_MAX + 1, 0);
41			}
42
43			//----------------------------------------------------------------------
44			public function writeFormatInformation($width, &$frame, $mask, $level)
45			{
46			$blacks = 0;
47			$format = QRspec::getFormatInfo($mask, $level);
48
49			for ($i = 0; $i < 8; $i++) {
50			if ($format & 1) {
51			$blacks += 2;
52			$v = 0x85;
53			} else {
54			$v = 0x84;
55			}
56
57			$frame[8][$width - 1 - $i] = chr($v);
58			if ($i < 6) {
59			$frame[$i][8] = chr($v);
60			} else {
61			$frame[$i + 1][8] = chr($v);
62			}
63			$format = $format >> 1;
64			}
65
66			for ($i = 0; $i < 7; $i++) {
67			if ($format & 1) {
68			$blacks += 2;
69			$v = 0x85;
70			} else {
71			$v = 0x84;
72			}
73
74			$frame[$width - 7 + $i][8] = chr($v);
75			if ($i == 0) {
76			$frame[8][7] = chr($v);
77			} else {
78			$frame[8][6 - $i] = chr($v);
79			}
80
81			$format = $format >> 1;
82			}
83
84			return $blacks;
85			}
86
87			//----------------------------------------------------------------------
88			public function mask0($x, $y) { return ($x + $y) & 1; }
89			public function mask1($x, $y) { return ($y & 1); }
90			public function mask2($x, $y) { return ($x % 3); }
91			public function mask3($x, $y) { return ($x + $y) % 3; }
92			public function mask4($x, $y) { return (((int) ($y / 2)) + ((int) ($x / 3))) & 1; }
93			public function mask5($x, $y) { return (($x * $y) & 1) + ($x * $y) % 3; }
94			public function mask6($x, $y) { return ((($x * $y) & 1) + ($x * $y) % 3) & 1; }
95			public function mask7($x, $y) { return ((($x * $y) % 3) + (($x + $y) & 1)) & 1; }
96
97			//----------------------------------------------------------------------
98			private function generateMaskNo($maskNo, $width, $frame)
99			{
100			$bitMask = array_fill(0, $width, array_fill(0, $width, 0));
101
102			for ($y = 0; $y < $width; $y++) {
103			for ($x = 0; $x < $width; $x++) {
104			if (ord($frame[$y][$x]) & 0x80) {
105			$bitMask[$y][$x] = 0;
106			} else {
107			$maskFunc = call_user_func(array($this, 'mask'.$maskNo), $x, $y);
108			$bitMask[$y][$x] = ($maskFunc == 0) ? 1 : 0;
109			}
110
111			}
112			}
113
114			return $bitMask;
115			}
116
117			//----------------------------------------------------------------------
118			public static function serial($bitFrame)
119			{
120			$codeArr = array();
121
122			foreach ($bitFrame as $line) {
123			$codeArr[] = join('', $line);
124			}
125
126			return gzcompress(join("\n", $codeArr), 9);
127			}
128
129			//----------------------------------------------------------------------
130			public static function unserial($code)
131			{
132			$codeArr = array();
133
134			$codeLines = explode("\n", gzuncompress($code));
135			foreach ($codeLines as $line) {
136			$codeArr[] = str_split($line);
137			}
138
139			return $codeArr;
140			}
141
142			//----------------------------------------------------------------------
143			public function makeMaskNo($maskNo, $width, $s, &$d, $maskGenOnly = false)
144			{
145			$b = 0;
146			$bitMask = array();
147
148			$fileName = QR_CACHE_DIR.'mask_'.$maskNo.DIRECTORY_SEPARATOR.'mask_'.$width.'_'.$maskNo.'.dat';
149
150			if (QR_CACHEABLE) {
151			if (file_exists($fileName)) {
152			$bitMask = self::unserial(file_get_contents($fileName));
153			} else {
154			$bitMask = $this->generateMaskNo($maskNo, $width, $s);
155			if (!file_exists(QR_CACHE_DIR.'mask_'.$maskNo)) {
156			mkdir(QR_CACHE_DIR.'mask_'.$maskNo);
157			}
158			file_put_contents($fileName, self::serial($bitMask));
159			}
160			} else {
161			$bitMask = $this->generateMaskNo($maskNo, $width, $s);
162			}
163
164			if ($maskGenOnly) {
165			return;
166			}
167
168			$d = $s;
169
170			for ($y = 0; $y < $width; $y++) {
171			for ($x = 0; $x < $width; $x++) {
172			if ($bitMask[$y][$x] == 1) {
173			$d[$y][$x] = chr(ord($s[$y][$x]) ^ (int) $bitMask[$y][$x]);
174			}
175			$b += (int) (ord($d[$y][$x]) & 1);
176			}
177			}
178
179			return $b;
180			}
181
182			//----------------------------------------------------------------------
183			public function makeMask($width, $frame, $maskNo, $level)
184			{
185			$masked = array_fill(0, $width, str_repeat("\0", $width));
186			$this->makeMaskNo($maskNo, $width, $frame, $masked);
187			$this->writeFormatInformation($width, $masked, $maskNo, $level);
188
189			return $masked;
190			}
191
192			//----------------------------------------------------------------------
193			public function calcN1N3($length)
194			{
195			$demerit = 0;
196
197			for ($i = 0; $i < $length; $i++) {
198
199			if ($this->runLength[$i] >= 5) {
200			$demerit += (N1 + ($this->runLength[$i] - 5));
201			}
202			if ($i & 1) {
203			if (($i >= 3) && ($i < ($length - 2)) && ($this->runLength[$i] % 3 == 0)) {
204			$fact = (int) ($this->runLength[$i] / 3);
205			if (($this->runLength[$i - 2] == $fact) &&
206			($this->runLength[$i - 1] == $fact) &&
207			($this->runLength[$i + 1] == $fact) &&
208			($this->runLength[$i + 2] == $fact)) {
209			if (($this->runLength[$i - 3] < 0) \|\| ($this->runLength[$i - 3] >= (4 * $fact))) {
210			$demerit += N3;
211			} else if ((($i + 3) >= $length) \|\| ($this->runLength[$i + 3] >= (4 * $fact))) {
212			$demerit += N3;
213			}
214			}
215			}
216			}
217			}
218			return $demerit;
219			}
220
221			//----------------------------------------------------------------------
222			public function evaluateSymbol($width, $frame)
223			{
224			$head = 0;
225			$demerit = 0;
226
227			for ($y = 0; $y < $width; $y++) {
228			$head = 0;
229			$this->runLength[0] = 1;
230
231			$frameY = $frame[$y];
232
233			if ($y > 0) {
234			$frameYM = $frame[$y - 1];
235			}
236
237			for ($x = 0; $x < $width; $x++) {
238			if (($x > 0) && ($y > 0)) {
239			$b22 = ord($frameY[$x]) & ord($frameY[$x - 1]) & ord($frameYM[$x]) & ord($frameYM[$x - 1]);
			0 ignored issues – show Comprehensibility Best Practice introduced 2019-12-19 19:08 UTC by Report Bug Copy Issue Report Show Similar Issues like this The variable `$frameYM` does not seem to be defined for all execution paths leading up to this point. Loading history...
240			$w22 = ord($frameY[$x]) \| ord($frameY[$x - 1]) \| ord($frameYM[$x]) \| ord($frameYM[$x - 1]);
241
242			if (($b22 \| ($w22 ^ 1)) & 1) {
243			$demerit += N2;
244			}
245			}
246			if (($x == 0) && (ord($frameY[$x]) & 1)) {
247			$this->runLength[0] = -1;
248			$head = 1;
249			$this->runLength[$head] = 1;
250			} else if ($x > 0) {
251			if ((ord($frameY[$x]) ^ ord($frameY[$x - 1])) & 1) {
252			$head++;
253			$this->runLength[$head] = 1;
254			} else {
255			$this->runLength[$head]++;
256			}
257			}
258			}
259
260			$demerit += $this->calcN1N3($head + 1);
261			}
262
263			for ($x = 0; $x < $width; $x++) {
264			$head = 0;
265			$this->runLength[0] = 1;
266
267			for ($y = 0; $y < $width; $y++) {
268			if ($y == 0 && (ord($frame[$y][$x]) & 1)) {
269			$this->runLength[0] = -1;
270			$head = 1;
271			$this->runLength[$head] = 1;
272			} else if ($y > 0) {
273			if ((ord($frame[$y][$x]) ^ ord($frame[$y - 1][$x])) & 1) {
274			$head++;
275			$this->runLength[$head] = 1;
276			} else {
277			$this->runLength[$head]++;
278			}
279			}
280			}
281
282			$demerit += $this->calcN1N3($head + 1);
283			}
284
285			return $demerit;
286			}
287
288
289			//----------------------------------------------------------------------
290			public function mask($width, $frame, $level)
291			{
292			$minDemerit = PHP_INT_MAX;
293			$bestMaskNum = 0;
			0 ignored issues – show Unused Code introduced 2019-12-19 19:08 UTC by Report Bug Copy Issue Report Show Similar Issues like this The assignment to `$bestMaskNum` is dead and can be removed. Loading history...
294			$bestMask = array();
			0 ignored issues – show Unused Code introduced 2019-12-19 19:08 UTC by Report Bug Copy Issue Report Show Similar Issues like this The assignment to `$bestMask` is dead and can be removed. Loading history...
295
296			$checked_masks = array(0, 1, 2, 3, 4, 5, 6, 7);
297
298			if (QR_FIND_FROM_RANDOM !== false) {
			0 ignored issues – show introduced 2019-12-19 19:08 UTC by Report Bug Copy Issue Report Show Similar Issues like this The condition `QR_FIND_FROM_RANDOM !== false` is always `false`. Loading history...
299
300			$howManuOut = 8 - (QR_FIND_FROM_RANDOM % 9);
301			for ($i = 0; $i < $howManuOut; $i++) {
302			$remPos = rand(0, count($checked_masks) - 1);
303			unset($checked_masks[$remPos]);
304			$checked_masks = array_values($checked_masks);
305			}
306
307			}
308
309			$bestMask = $frame;
310
311			foreach ($checked_masks as $i) {
312			$mask = array_fill(0, $width, str_repeat("\0", $width));
313
314			$demerit = 0;
			0 ignored issues – show Unused Code introduced 2019-12-19 19:08 UTC by Report Bug Copy Issue Report Show Similar Issues like this The assignment to `$demerit` is dead and can be removed. Loading history...
315			$blacks = 0;
			0 ignored issues – show Unused Code introduced 2019-12-19 19:08 UTC by Report Bug Copy Issue Report Show Similar Issues like this The assignment to `$blacks` is dead and can be removed. Loading history...
316			$blacks = $this->makeMaskNo($i, $width, $frame, $mask);
317			$blacks += $this->writeFormatInformation($width, $mask, $i, $level);
318			$blacks = (int) (100 * $blacks / ($width * $width));
319			$demerit = (int) ((int) (abs($blacks - 50) / 5) * N4);
320			$demerit += $this->evaluateSymbol($width, $mask);
321
322			if ($demerit < $minDemerit) {
323			$minDemerit = $demerit;
324			$bestMask = $mask;
325			$bestMaskNum = $i;
326			}
327			}
328
329			return $bestMask;
330			}
331
332			//----------------------------------------------------------------------
333			}
334

codysnider / tt-rss

Issues (1270)

lib/phpqrcode/qrmask.php (6 issues)

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