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<?php |
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namespace PHPQRCode; |
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class FrameFiller { |
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public $width; |
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public $frame; |
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public $x; |
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public $y; |
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public $dir; |
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public $bit; |
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public function __construct($width, &$frame) |
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{ |
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$this->width = $width; |
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$this->frame = $frame; |
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$this->x = $width - 1; |
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$this->y = $width - 1; |
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$this->dir = -1; |
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$this->bit = -1; |
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} |
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public function setFrameAt($at, $val) |
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{ |
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$this->frame[$at['y']][$at['x']] = chr($val); |
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} |
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public function getFrameAt($at) |
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{ |
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return ord($this->frame[$at['y']][$at['x']]); |
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} |
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public function next() |
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{ |
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do { |
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if($this->bit == -1) { |
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$this->bit = 0; |
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return array('x'=>$this->x, 'y'=>$this->y); |
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} |
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$x = $this->x; |
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$y = $this->y; |
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$w = $this->width; |
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if($this->bit == 0) { |
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$x--; |
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$this->bit++; |
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} else { |
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$x++; |
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$y += $this->dir; |
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$this->bit--; |
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} |
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if($this->dir < 0) { |
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if($y < 0) { |
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$y = 0; |
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$x -= 2; |
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$this->dir = 1; |
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if($x == 6) { |
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$x--; |
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$y = 9; |
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} |
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} |
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} else { |
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if($y == $w) { |
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$y = $w - 1; |
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$x -= 2; |
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$this->dir = -1; |
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if($x == 6) { |
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$x--; |
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$y -= 8; |
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} |
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} |
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} |
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if($x < 0 || $y < 0) return null; |
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$this->x = $x; |
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$this->y = $y; |
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} while(ord($this->frame[$y][$x]) & 0x80); |
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return array('x'=>$x, 'y'=>$y); |
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} |
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} ; |
