151 lines
3.0 KiB
PHP
151 lines
3.0 KiB
PHP
<?php
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declare(strict_types = 1);
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namespace BaconQrCode\Encoder;
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use SplFixedArray;
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use Traversable;
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/**
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* Byte matrix.
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*/
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final class ByteMatrix
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{
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/**
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* Bytes in the matrix, represented as array.
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*
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* @var SplFixedArray<SplFixedArray<int>>
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*/
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private $bytes;
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/**
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* Width of the matrix.
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*
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* @var int
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*/
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private $width;
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/**
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* Height of the matrix.
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*
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* @var int
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*/
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private $height;
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public function __construct(int $width, int $height)
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{
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$this->height = $height;
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$this->width = $width;
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$this->bytes = new SplFixedArray($height);
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for ($y = 0; $y < $height; ++$y) {
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$this->bytes[$y] = SplFixedArray::fromArray(array_fill(0, $width, 0));
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}
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}
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/**
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* Gets the width of the matrix.
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*/
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public function getWidth() : int
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{
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return $this->width;
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}
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/**
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* Gets the height of the matrix.
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*/
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public function getHeight() : int
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{
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return $this->height;
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}
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/**
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* Gets the internal representation of the matrix.
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*
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* @return SplFixedArray<SplFixedArray<int>>
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*/
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public function getArray() : SplFixedArray
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{
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return $this->bytes;
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}
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/**
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* @return Traversable<int>
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*/
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public function getBytes() : Traversable
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{
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foreach ($this->bytes as $row) {
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foreach ($row as $byte) {
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yield $byte;
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}
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}
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}
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/**
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* Gets the byte for a specific position.
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*/
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public function get(int $x, int $y) : int
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{
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return $this->bytes[$y][$x];
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}
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/**
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* Sets the byte for a specific position.
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*/
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public function set(int $x, int $y, int $value) : void
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{
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$this->bytes[$y][$x] = $value;
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}
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/**
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* Clears the matrix with a specific value.
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*/
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public function clear(int $value) : void
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{
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for ($y = 0; $y < $this->height; ++$y) {
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for ($x = 0; $x < $this->width; ++$x) {
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$this->bytes[$y][$x] = $value;
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}
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}
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}
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public function __clone()
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{
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$this->bytes = clone $this->bytes;
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foreach ($this->bytes as $index => $row) {
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$this->bytes[$index] = clone $row;
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}
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}
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/**
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* Returns a string representation of the matrix.
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*/
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public function __toString() : string
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{
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$result = '';
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for ($y = 0; $y < $this->height; $y++) {
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for ($x = 0; $x < $this->width; $x++) {
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switch ($this->bytes[$y][$x]) {
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case 0:
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$result .= ' 0';
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break;
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case 1:
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$result .= ' 1';
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break;
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default:
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$result .= ' ';
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break;
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}
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}
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$result .= "\n";
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}
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return $result;
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}
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}
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