<?php
namespace Zxing\Common;
final class BitMatrix {
private $width;
private $height;
private $rowSize;
private $bits;
public function __construct($width, $height=false, $rowSize=false, $bits=false) {
if(!$height){
$height = $width;
}
if(!$rowSize){
$rowSize = intval(($width + 31) / 32);
}
if(!$bits){
$bits = fill_array(0,$rowSize*$height,0);array();//new int[rowSize * height];
}
$this->width = $width;
$this->height = $height;
$this->rowSize = $rowSize;
$this->bits = $bits;
}
public static function parse($stringRepresentation, $setString, $unsetString){
if (!$stringRepresentation) {
throw new \InvalidArgumentException();
}
$bits = array();
$bitsPos = 0;
$rowStartPos = 0;
$rowLength = -1;
$nRows = 0;
$pos = 0;
while ($pos < strlen($stringRepresentation)) {
if ($stringRepresentation{$pos} == '\n' ||
$stringRepresentation->{$pos} == '\r') {
if ($bitsPos > $rowStartPos) {
if($rowLength == -1) {
$rowLength = $bitsPos - $rowStartPos;
}
else if ($bitsPos - $rowStartPos != $rowLength) {
throw new \InvalidArgumentException("row lengths do not match");
}
$rowStartPos = $bitsPos;
$nRows++;
}
$pos++;
}
else if (substr($stringRepresentation,$pos, strlen($setString))==$setString) {
$pos += strlen($setString);
$bits[$bitsPos] = true;
$bitsPos++;
}
else if (substr($stringRepresentation, $pos + strlen($unsetString))==$unsetString) {
$pos += strlen($unsetString);
$bits[$bitsPos] = false;
$bitsPos++;
} else {
throw new \InvalidArgumentException(
"illegal character encountered: " . substr($stringRepresentation,$pos));
}
}
// no EOL at end?
if ($bitsPos > $rowStartPos) {
if($rowLength == -1) {
$rowLength = $bitsPos - $rowStartPos;
} else if ($bitsPos - $rowStartPos != $rowLength) {
throw new \InvalidArgumentException("row lengths do not match");
}
$nRows++;
}
$matrix = new BitMatrix($rowLength, $nRows);
for ($i = 0; $i < $bitsPos; $i++) {
if ($bits[$i]) {
$matrix->set($i % $rowLength, $i / $rowLength);
}
}
return $matrix;
}
/**
* <p>Gets the requested bit, where true means black.</p>
*
* @param $x; The horizontal component (i.e. which column)
* @param $y; The vertical component (i.e. which row)
* @return value of given bit in matrix
*/
public function get($x, $y) {
$offset = intval($y * $this->rowSize + ($x / 32));
if(!isset($this->bits[$offset])){
$this->bits[$offset] = 0;
}
// return (($this->bits[$offset] >> ($x & 0x1f)) & 1) != 0;
return (uRShift($this->bits[$offset],($x & 0x1f)) & 1) != 0;//было >>> вместо >>, не знаю как эмулировать беззнаковый сдвиг
}
/**
* <p>Sets the given bit to true.</p>
*
* @param $x; The horizontal component (i.e. which column)
* @param $y; The vertical component (i.e. which row)
*/
public function set($x, $y) {
$offset = intval($y * $this->rowSize + ($x / 32));
if(!isset($this->bits[$offset])){
$this->bits[$offset] = 0;
}
//$this->bits[$offset] = $this->bits[$offset];
// if($this->bits[$offset]>200748364){
//$this->bits= 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|= intval32bits(1 << ($x & 0x1f));
$bob = $this->bits[$offset];
$bob |= 1 << ($x & 0x1f);
$this->bits[$offset] |= overflow32($bob);
//$this->bits[$offset] = intval32bits($this->bits[$offset]);
//}
//16777216
}
public function _unset($x, $y) {//было unset, php не позволяет использовать unset
$offset = intval($y * $this->rowSize + ($x / 32));
$this->bits[$offset] &= ~(1 << ($x & 0x1f));
}
/**1 << (249 & 0x1f)
* <p>Flips the given bit.</p>
*
* @param $x; The horizontal component (i.e. which column)
* @param $y; The vertical component (i.e. which row)
*/
public function flip($x, $y) {
$offset = $y * $this->rowSize + intval($x / 32);
$this->bits[$offset] = overflow32($this->bits[$offset]^(1 << ($x & 0x1f)));
}
/**
* Exclusive-or (XOR): Flip the bit in this {@code BitMatrix} if the corresponding
* mask bit is set.
*
* @param $mask; XOR mask
*/
public function _xor($mask) {//было xor, php не позволяет использовать xor
if ($this->width != $mask->getWidth() || $this->height != $mask->getHeight()
|| $this->rowSize != $mask->getRowSize()) {
throw new \InvalidArgumentException("input matrix dimensions do not match");
}
$rowArray = new BitArray($this->width / 32 + 1);
for ($y = 0; $y < $this->height; $y++) {
$offset = $y * $this->rowSize;
$row = $mask->getRow($y, $rowArray)->getBitArray();
for ($x = 0; $x < $this->rowSize; $x++) {
$this->bits[$offset + $x] ^= $row[$x];
}
}
}
/**
* Clears all bits (sets to false).
*/
public function clear() {
$max = count($this->bits);
for ($i = 0; $i < $max; $i++) {
$this->bits[$i] = 0;
}
}
/**
* <p>Sets a square region of the bit matrix to true.</p>
*
* @param $left; The horizontal position to begin at (inclusive)
* @param $top; The vertical position to begin at (inclusive)
* @param $width; The width of the region
* @param $height; The height of the region
*/
public function setRegion($left, $top, $width, $height) {
if ($top < 0 || $left < 0) {
throw new \InvalidArgumentException("Left and top must be nonnegative");
}
if ($height < 1 || $width < 1) {
throw new \InvalidArgumentException("Height and width must be at least 1");
}
$right = $left + $width;
$bottom = $top + $height;
if ($bottom > $this->height || $right > $this->width) { //> this.height || right > this.width
throw new \InvalidArgumentException("The region must fit inside the matrix");
}
for ($y = $top; $y < $bottom; $y++) {
$offset = $y * $this->rowSize;
for ($x = $left; $x < $right; $x++) {
$this->bits[$offset + intval($x / 32)] = overflow32($this->bits[$offset + intval($x / 32)]|= 1 << ($x & 0x1f));
}
}
}
/**
* A fast method to retrieve one row of data from the matrix as a BitArray.
*
* @param $y; The row to retrieve
* @param $row; An optional caller-allocated BitArray, will be allocated if null or too small
* @return The resulting BitArray - this reference should always be used even when passing
* your own row
*/
public function getRow($y, $row) {
if ($row == null || $row->getSize() < $this->width) {
$row = new BitArray($this->width);
} else {
$row->clear();
}
$offset = $y * $this->rowSize;
for ($x = 0; $x < $this->rowSize; $x++) {
$row->setBulk($x * 32, $this->bits[$offset + $x]);
}
return $row;
}
/**
* @param $y; row to set
* @param $row; {@link BitArray} to copy from
*/
public function setRow($y, $row) {
$this->bits = arraycopy($row->getBitArray(), 0, $this->bits, $y * $this->rowSize, $this->rowSize);
}
/**
* Modifies this {@code BitMatrix} to represent the same but rotated 180 degrees
*/
public function rotate180() {
$width = $this->getWidth();
$height = $this-getHeight();
$topRow = new BitArray($width);
$bottomRow = new BitArray($width);
for ($i = 0; $i < ($height+1) / 2; $i++) {
$topRow = $this->getRow($i, $topRow);
$bottomRow = $this->getRow($height - 1 - $i, $bottomRow);
$topRow->reverse();
$bottomRow->reverse();
$this->setRow($i, $bottomRow);
$this->setRow($height - 1 - $i, $topRow);
}
}
/**
* This is useful in detecting the enclosing rectangle of a 'pure' barcode.
*
* @return {@code left,top,width,height} enclosing rectangle of all 1 bits, or null if it is all white
*/
public function getEnclosingRectangle() {
$left = $this->width;
$top = $this->height;
$right = -1;
$bottom = -1;
for ($y = 0; $y < $this->height; $y++) {
for ($x32 = 0; $x32 < $this->rowSize; $x32++) {
$theBits = $this->bits[$y * $this->rowSize + $x32];
if ($theBits != 0) {
if ($y < $top) {
$top = $y;
}
if ($y > $bottom) {
$bottom = $y;
}
if ($x32 * 32 < $left) {
$bit = 0;
while (($theBits << (31 - $bit)) == 0) {
$bit++;
}
if (($x32 * 32 + $bit) < $left) {
$left = $x32 * 32 + $bit;
}
}
if ($x32 * 32 + 31 > $right) {
$bit = 31;
while ((sdvig3($theBits, $bit)) == 0) {//>>>
$bit--;
}
if (($x32 * 32 + $bit) > $right) {
$right = $x32 * 32 + $bit;
}
}
}
}
}
$width = $right - $left;
$height = $bottom - $top;
if ($width < 0 || $height < 0) {
return null;
}
return array($left, $top, $width, $height);
}
/**
* This is useful in detecting a corner of a 'pure' barcode.
*
* @return {@code x,y} coordinate of top-left-most 1 bit, or null if it is all white
*/
public function getTopLeftOnBit() {
$bitsOffset = 0;
while ($bitsOffset < count($this->bits) && $this->bits[$bitsOffset] == 0) {
$bitsOffset++;
}
if ($bitsOffset == count($this->bits)) {
return null;
}
$y = $bitsOffset / $this->rowSize;
$x = ($bitsOffset % $this->rowSize) * 32;
$theBits = $this->bits[$bitsOffset];
$bit = 0;
while (($theBits << (31-$bit)) == 0) {
$bit++;
}
$x += $bit;
return array($x, $y);
}
public function getBottomRightOnBit() {
$bitsOffset = count($this->bits) - 1;
while ($bitsOffset >= 0 && $this->bits[$bitsOffset] == 0) {
$bitsOffset--;
}
if ($bitsOffset < 0) {
return null;
}
$y = $bitsOffset / $this->rowSize;
$x = ($bitsOffset % $this->rowSize) * 32;
$theBits = $this->bits[$bitsOffset];
$bit = 31;
while ((sdvig3($theBits, $bit)) == 0) {//>>>
$bit--;
}
$x += $bit;
return array($x, $y);
}
/**
* @return The width of the matrix
*/
public function getWidth() {
return $this->width;
}
/**
* @return The height of the matrix
*/
public function getHeight() {
return $this->height;
}
/**
* @return The row size of the matrix
*/
public function getRowSize() {
return $this->rowSize;
}
//@Override
public function equals($o) {
if (!($o instanceof BitMatrix)) {
return false;
}
$other = $o;
return $this->width == $other->width && $this->height == $other->height && $this->rowSize == $other->rowSize &&
$this->bits===$other->bits;
}
//@Override
public function hashCode() {
$hash = $this->width;
$hash = 31 * $hash + $this->width;
$hash = 31 * $hash + $this->height;
$hash = 31 * $hash + $this->rowSize;
$hash = 31 * $hash + hashCode($this->bits);
return $hash;
}
//@Override
public function toString($setString='', $unsetString='',$lineSeparator='') {
if(!$setString||!$unsetString){
return (string)"X "." ";
}
if($lineSeparator&&$lineSeparator!=="\n"){
return $this->toString_($setString, $unsetString, $lineSeparator);
}
return (string)($setString. $unsetString. "\n");
}
/**
* @deprecated call {@link #toString(String,String)} only, which uses \n line separator always
*/
// @Deprecated
public function toString_($setString, $unsetString, $lineSeparator) {
//$result = new StringBuilder(height * (width + 1));
$result = '';
for ($y = 0; $y < $this->height; $y++) {
for ($x = 0; $x < $this->width; $x++) {
$result .= ($this->get($x, $y) ? $setString : $unsetString);
}
$result .= ($lineSeparator);
}
return (string)$result;
}
// @Override
public function _clone() {//clone()
return new BitMatrix($this->width, $this->height, $this->rowSize, $this->bits);
}
}