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<?php |
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/** |
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* Class MaskPatternTester |
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* |
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* @filesource MaskPatternTester.php |
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* @created 22.11.2017 |
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* @package chillerlan\QRCode\Data |
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* @author Smiley <[email protected]> |
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* @copyright 2017 Smiley |
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* @license MIT |
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*/ |
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namespace chillerlan\QRCode\Data; |
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use function abs, call_user_func; |
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/** |
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* The sole purpose of this class is to receive a QRMatrix object and run the pattern tests on it. |
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* |
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* @link http://www.thonky.com/qr-code-tutorial/data-masking |
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*/ |
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class MaskPatternTester{ |
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protected QRMatrix $matrix; |
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protected int $moduleCount; |
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/** |
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* Receives the matrix an sets the module count |
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* |
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* @see \chillerlan\QRCode\QROptions::$maskPattern |
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* @see \chillerlan\QRCode\Data\QRMatrix::$maskPattern |
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* @see \chillerlan\QRCode\QRCode::getBestMaskPattern() |
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*/ |
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public function __construct(QRMatrix $matrix){ |
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$this->matrix = $matrix; |
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$this->moduleCount = $this->matrix->size(); |
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} |
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/** |
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* Returns the penalty for the given mask pattern |
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* |
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* @see \chillerlan\QRCode\QROptions::$maskPattern |
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* @see \chillerlan\QRCode\Data\QRMatrix::$maskPattern |
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* @see \chillerlan\QRCode\QRCode::getBestMaskPattern() |
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*/ |
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public function testPattern():int{ |
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$penalty = 0; |
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for($level = 1; $level <= 4; $level++){ |
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$penalty += call_user_func([$this, 'testLevel'.$level]); |
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} |
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return (int)$penalty; |
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} |
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/** |
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* Checks for each group of five or more same-colored modules in a row (or column) |
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*/ |
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protected function testLevel1():float{ |
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$penalty = 0; |
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foreach($this->matrix->matrix() as $y => $row){ |
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foreach($row as $x => $val){ |
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$count = 0; |
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for($ry = -1; $ry <= 1; $ry++){ |
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if($y + $ry < 0 || $this->moduleCount <= $y + $ry){ |
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continue; |
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} |
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for($rx = -1; $rx <= 1; $rx++){ |
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if(($ry === 0 && $rx === 0) || ($x + $rx < 0 || $this->moduleCount <= $x + $rx)){ |
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continue; |
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} |
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if($this->matrix->check($x + $rx, $y + $ry) === (($val >> 8) > 0)){ |
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$count++; |
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} |
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} |
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} |
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if($count > 5){ |
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$penalty += (3 + $count - 5); |
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} |
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} |
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} |
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return $penalty; |
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} |
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/** |
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* Checks for each 2x2 area of same-colored modules in the matrix |
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*/ |
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protected function testLevel2():float{ |
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$penalty = 0; |
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foreach($this->matrix->matrix() as $y => $row){ |
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if($y > $this->moduleCount - 2){ |
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break; |
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} |
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foreach($row as $x => $val){ |
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if($x > $this->moduleCount - 2){ |
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break; |
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} |
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$count = 0; |
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if($val >> 8 > 0){ |
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$count++; |
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} |
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if($this->matrix->check($y, $x + 1)){ |
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$count++; |
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} |
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if($this->matrix->check($y + 1, $x)){ |
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$count++; |
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} |
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if($this->matrix->check($y + 1, $x + 1)){ |
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$count++; |
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} |
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if($count === 0 || $count === 4){ |
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$penalty += 3; |
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} |
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} |
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} |
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return $penalty; |
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} |
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/** |
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* Checks if there are patterns that look similar to the finder patterns |
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*/ |
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protected function testLevel3():float{ |
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$penalty = 0; |
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foreach($this->matrix->matrix() as $y => $row){ |
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foreach($row as $x => $val){ |
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if($x <= $this->moduleCount - 7){ |
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if( |
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$this->matrix->check($x , $y) |
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&& !$this->matrix->check($x + 1, $y) |
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&& $this->matrix->check($x + 2, $y) |
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&& $this->matrix->check($x + 3, $y) |
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&& $this->matrix->check($x + 4, $y) |
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&& !$this->matrix->check($x + 5, $y) |
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&& $this->matrix->check($x + 6, $y) |
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){ |
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$penalty += 40; |
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} |
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} |
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if($y <= $this->moduleCount - 7){ |
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if( |
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$this->matrix->check($x, $y) |
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&& !$this->matrix->check($x, $y + 1) |
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&& $this->matrix->check($x, $y + 2) |
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&& $this->matrix->check($x, $y + 3) |
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&& $this->matrix->check($x, $y + 4) |
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&& !$this->matrix->check($x, $y + 5) |
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&& $this->matrix->check($x, $y + 6) |
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){ |
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$penalty += 40; |
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} |
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} |
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} |
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} |
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return $penalty; |
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} |
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/** |
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* Checks if more than half of the modules are dark or light, with a larger penalty for a larger difference |
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*/ |
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protected function testLevel4():float{ |
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$count = 0; |
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foreach($this->matrix->matrix() as $y => $row){ |
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foreach($row as $x => $val){ |
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if($val >> 8 > 0){ |
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$count++; |
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} |
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} |
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} |
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return (abs(100 * $count / $this->moduleCount / $this->moduleCount - 50) / 5) * 10; |
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} |
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} |
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chillerlan /
php-qrcode
