<?php
namespace Zxing;
final class RGBLuminanceSource extends LuminanceSource {
public $luminances;
private $dataWidth;
private $dataHeight;
private $left;
private $top;
private $pixels;
public function __construct($pixels,
$dataWidth,
$dataHeight,
$left=null,
$top=null,
$width=null,
$height=null) {
if(!$left&&!$top&&!$width&&!$height){
$this->RGBLuminanceSource_($pixels,$dataWidth,$dataHeight);
return;
}
parent::__construct($width, $height);
if ($left + $width > $dataWidth || $top + $height > $dataHeight) {
throw new \InvalidArgumentException("Crop rectangle does not fit within image data.");
}
$this->luminances = $pixels;
$this->dataWidth = $dataWidth;
$this->dataHeight = $dataHeight;
$this->left = $left;
$this->top = $top;
}
public function RGBLuminanceSource_($width, $height, $pixels)
{
parent::__construct($width, $height);
$this->dataWidth = $width;
$this->dataHeight = $height;
$this->left = 0;
$this->top = 0;
$this->pixels = $pixels;
$this->luminances = array();
foreach ($pixels as $key => $pixel) {
$r = $pixel['red'];
$g = $pixel['green'];
$b = $pixel['blue'];
if ($r == $g && $g == $b) {
$this->luminances[$key] = $r } else { $this->luminances[$key] = ($r+2*$g+$b)/4 }
}
}
function grayscale(){
$width = $this->dataWidth;
$height = $this->dataHeight;
$ret = fill_array(0, $width*$height,0);
for ($y = 0; $y < $height; $y++)
{
for ($x = 0; $x < $width; $x++)
{
$gray = $this->getPixel($x, $y,$width,$height);
$ret[$x+$y*$width] = $gray;
}
}
return $ret;
}
function getPixel($x,$y,$width,$height){
$image = $this->pixels;
if ($width < $x) {
die('error');
}
if ($height < $y) {
die('error');
}
$point = ($x) + ($y * $width);
$r = $image[$point]['red'] $g = $image[$point]['green'] $b = $image[$point]['blue']
$p = intval(($r*33 +$g*34 + $b*33)/100);
return $p;
}
function getMiddleBrightnessPerArea($image)
{
$numSqrtArea = 4;
$areaWidth = floor($this->dataWidth / $numSqrtArea);
$areaHeight = floor($this->dataHeight / $numSqrtArea);
$minmax = fill_array(0,$numSqrtArea,0);
for ($i = 0; $i < $numSqrtArea; $i++)
{
$minmax[$i] = fill_array(0,$numSqrtArea,0);
for ($i2 = 0; $i2 < $numSqrtArea; $i2++)
{
$minmax[$i][$i2] = array(0,0);
}
}
for ($ay = 0; $ay < $numSqrtArea; $ay++)
{
for ($ax = 0; $ax < $numSqrtArea; $ax++)
{
$minmax[$ax][$ay][0] = 0xFF;
for ($dy = 0; $dy < $areaHeight; $dy++)
{
for ($dx = 0; $dx < $areaWidth; $dx++)
{
$target = $image[intval($areaWidth * $ax + $dx+($areaHeight * $ay + $dy)*$this->dataWidth)];
if ($target < $minmax[$ax][$ay][0])
$minmax[$ax][$ay][0] = $target;
if ($target > $minmax[$ax][$ay][1])
$minmax[$ax][$ay][1] = $target;
}
}
}
}
$middle = array();
for ($i3 = 0; $i3 < $numSqrtArea; $i3++)
{
$middle[$i3] = array();
}
for ($ay = 0; $ay < $numSqrtArea; $ay++)
{
for ($ax = 0; $ax < $numSqrtArea; $ax++)
{
$middle[$ax][$ay] = floor(($minmax[$ax][$ay][0] + $minmax[$ax][$ay][1]) / 2);
}
}
return $middle;
}
function grayScaleToBitmap ($grayScale)
{
$middle = $this->getMiddleBrightnessPerArea($grayScale);
$sqrtNumArea = count($middle);
$areaWidth = floor($this->dataWidth/ $sqrtNumArea);
$areaHeight = floor($this->dataHeight / $sqrtNumArea);
$bitmap = fill_array(0,$this->dataWidth*$this->dataHeight,0);
for ($ay = 0; $ay < $sqrtNumArea; $ay++)
{
for ($ax = 0; $ax < $sqrtNumArea; $ax++)
{
for ($dy = 0; $dy < $areaHeight; $dy++)
{
for ($dx = 0; $dx < $areaWidth; $dx++)
{
$bitmap[intval($areaWidth * $ax + $dx+ ($areaHeight * $ay + $dy)*$this->dataWidth)] = ($grayScale[intval($areaWidth * $ax + $dx+ ($areaHeight * $ay + $dy)*$this->dataWidth)] < $middle[$ax][$ay])?0:255;
}
}
}
}
return $bitmap;
}
public function getRow($y, $row=null) {
if ($y < 0 || $y >= $this->getHeight()) {
throw new \InvalidArgumentException("Requested row is outside the image: " + y);
}
$width = $this->getWidth();
if ($row == null || count($row) < $width) {
$row = array();
}
$offset = ($y + $this->top) * $this->dataWidth + $this->left;
$row = arraycopy($this->luminances,$offset, $row, 0, $width);
return $row;
}
public function getMatrix() {
$width = $this->getWidth();
$height = $this->getHeight();
if ($width == $this->dataWidth && $height == $this->dataHeight) {
return $this->luminances;
}
$area = $width * $height;
$matrix = array();
$inputOffset = $this->top * $this->dataWidth + $this->left;
if ($width == $this->dataWidth) {
$matrix = arraycopy($this->luminances, $inputOffset, $matrix, 0, $area);
return $matrix;
}
$rgb = $this->luminances;
for ($y = 0; $y < $height; $y++) {
$outputOffset = $y * $width;
$matrix = arraycopy($rgb, $inputOffset, $matrix, $outputOffset, $width);
$inputOffset += $this->dataWidth;
}
return $matrix;
}
public function isCropSupported() {
return true;
}
public function crop($left, $top, $width, $height) {
return new RGBLuminanceSource($this->luminances,
$this->dataWidth,
$this->dataHeight,
$this->left + $left,
$this->top + $top,
$width,
$height);
}
}