320 lines
8.3 KiB
PHP
320 lines
8.3 KiB
PHP
<?php
|
|
/*
|
|
* Copyright 2009 ZXing authors
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
namespace Zxing;
|
|
|
|
/**
|
|
* This class is used to help decode images from files which arrive as RGB data from
|
|
* an ARGB pixel array. It does not support rotation.
|
|
*
|
|
* @author dswitkin@google.com (Daniel Switkin)
|
|
* @author Betaminos
|
|
*/
|
|
final class RGBLuminanceSource extends LuminanceSource
|
|
{
|
|
public $luminances;
|
|
private $dataWidth;
|
|
private $dataHeight;
|
|
/**
|
|
* @var mixed|int
|
|
*/
|
|
private $left;
|
|
/**
|
|
* @var mixed|int
|
|
*/
|
|
private $top;
|
|
/**
|
|
* @var mixed|null
|
|
*/
|
|
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, $pixels): void
|
|
{
|
|
parent::__construct($width, $height);
|
|
|
|
$this->dataWidth = $width;
|
|
$this->dataHeight = $height;
|
|
$this->left = 0;
|
|
$this->top = 0;
|
|
$this->pixels = $pixels;
|
|
|
|
|
|
// In order to measure pure decoding speed, we convert the entire image to a greyscale array
|
|
// up front, which is the same as the Y channel of the YUVLuminanceSource in the real app.
|
|
$this->luminances = [];
|
|
//$this->luminances = $this->grayScaleToBitmap($this->grayscale());
|
|
|
|
foreach ($pixels as $key => $pixel) {
|
|
$r = $pixel['red'];
|
|
$g = $pixel['green'];
|
|
$b = $pixel['blue'];
|
|
|
|
/* if (($pixel & 0xFF000000) == 0) {
|
|
$pixel = 0xFFFFFFFF; // = white
|
|
}
|
|
|
|
// .229R + 0.587G + 0.114B (YUV/YIQ for PAL and NTSC)
|
|
|
|
$this->luminances[$key] =
|
|
(306 * (($pixel >> 16) & 0xFF) +
|
|
601 * (($pixel >> 8) & 0xFF) +
|
|
117 * ($pixel & 0xFF) +
|
|
0x200) >> 10;
|
|
|
|
*/
|
|
//$r = ($pixel >> 16) & 0xff;
|
|
//$g = ($pixel >> 8) & 0xff;
|
|
//$b = $pixel & 0xff;
|
|
if ($r == $g && $g == $b) {
|
|
// Image is already greyscale, so pick any channel.
|
|
|
|
$this->luminances[$key] = $r;//(($r + 128) % 256) - 128;
|
|
} else {
|
|
// Calculate luminance cheaply, favoring green.
|
|
$this->luminances[$key] = ($r + 2 * $g + $b) / 4;//(((($r + 2 * $g + $b) / 4) + 128) % 256) - 128;
|
|
}
|
|
}
|
|
|
|
/*
|
|
|
|
for ($y = 0; $y < $height; $y++) {
|
|
$offset = $y * $width;
|
|
for ($x = 0; $x < $width; $x++) {
|
|
$pixel = $pixels[$offset + $x];
|
|
$r = ($pixel >> 16) & 0xff;
|
|
$g = ($pixel >> 8) & 0xff;
|
|
$b = $pixel & 0xff;
|
|
if ($r == $g && $g == $b) {
|
|
// Image is already greyscale, so pick any channel.
|
|
|
|
$this->luminances[(int)($offset + $x)] = (($r+128) % 256) - 128;
|
|
} else {
|
|
// Calculate luminance cheaply, favoring green.
|
|
$this->luminances[(int)($offset + $x)] = (((($r + 2 * $g + $b) / 4)+128)%256) - 128;
|
|
}
|
|
|
|
|
|
|
|
}
|
|
*/
|
|
//}
|
|
// $this->luminances = $this->grayScaleToBitmap($this->luminances);
|
|
}
|
|
|
|
public 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 $ret;
|
|
}
|
|
|
|
public function getPixel($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'];//($image[$point] >> 16) & 0xff;
|
|
$g = $image[$point]['green'];//($image[$point] >> 8) & 0xff;
|
|
$b = $image[$point]['blue'];//$image[$point] & 0xff;
|
|
|
|
$p = (int)(($r * 33 + $g * 34 + $b * 33) / 100);
|
|
|
|
|
|
return $p;
|
|
}
|
|
|
|
public function grayScaleToBitmap($grayScale)
|
|
{
|
|
$middle = $this->getMiddleBrightnessPerArea($grayScale);
|
|
$sqrtNumArea = is_countable($middle) ? count($middle) : 0;
|
|
$areaWidth = floor($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++) {
|
|
$bitmap[(int)($areaWidth * $ax + $dx + ($areaHeight * $ay + $dy) * $this->dataWidth)] = ($grayScale[(int)($areaWidth * $ax + $dx + ($areaHeight * $ay + $dy) * $this->dataWidth)] < $middle[$ax][$ay]) ? 0 : 255;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return $bitmap;
|
|
}
|
|
|
|
public function getMiddleBrightnessPerArea($image)
|
|
{
|
|
$numSqrtArea = 4;
|
|
//obtain middle brightness((min + max) / 2) per area
|
|
$areaWidth = floor($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][$i2] = [0, 0];
|
|
}
|
|
}
|
|
for ($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 = $image[(int)($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;
|
|
}
|
|
}
|
|
}
|
|
//minmax[ax][ay][0] = (minmax[ax][ay][0] + minmax[ax][ay][1]) / 2;
|
|
}
|
|
}
|
|
$middle = [];
|
|
for ($i3 = 0; $i3 < $numSqrtArea; $i3++) {
|
|
$middle[$i3] = [];
|
|
}
|
|
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);
|
|
//Console.out.print(middle[ax][ay] + ",");
|
|
}
|
|
//Console.out.println("");
|
|
}
|
|
|
|
//Console.out.println("");
|
|
|
|
return $middle;
|
|
}
|
|
|
|
//@Override
|
|
public function getRow($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 || (is_countable($row) ? count($row) : 0) < $width) {
|
|
$row = [];
|
|
}
|
|
$offset = ($y + $this->top) * $this->dataWidth + $this->left;
|
|
$row = arraycopy($this->luminances, $offset, $row, 0, $width);
|
|
|
|
return $row;
|
|
}
|
|
|
|
//@Override
|
|
public function getMatrix()
|
|
{
|
|
$width = $this->getWidth();
|
|
$height = $this->getHeight();
|
|
|
|
// If the caller asks for the entire underlying image, save the copy and give them the
|
|
// original data. The docs specifically warn that result.length must be ignored.
|
|
if ($width == $this->dataWidth && $height == $this->dataHeight) {
|
|
return $this->luminances;
|
|
}
|
|
|
|
$area = $width * $height;
|
|
$matrix = [];
|
|
$inputOffset = $this->top * $this->dataWidth + $this->left;
|
|
|
|
// If the width matches the full width of the underlying data, perform a single copy.
|
|
if ($width == $this->dataWidth) {
|
|
$matrix = arraycopy($this->luminances, $inputOffset, $matrix, 0, $area);
|
|
|
|
return $matrix;
|
|
}
|
|
|
|
// Otherwise copy one cropped row at a time.
|
|
$rgb = $this->luminances;
|
|
for ($y = 0; $y < $height; $y++) {
|
|
$outputOffset = $y * $width;
|
|
$matrix = arraycopy($rgb, $inputOffset, $matrix, $outputOffset, $width);
|
|
$inputOffset += $this->dataWidth;
|
|
}
|
|
|
|
return $matrix;
|
|
}
|
|
|
|
//@Override
|
|
public function isCropSupported()
|
|
{
|
|
return true;
|
|
}
|
|
|
|
//@Override
|
|
public function crop($left, $top, $width, $height): \Zxing\RGBLuminanceSource
|
|
{
|
|
return new RGBLuminanceSource(
|
|
$this->luminances,
|
|
$this->dataWidth,
|
|
$this->dataHeight,
|
|
$this->left + $left,
|
|
$this->top + $top,
|
|
$width,
|
|
$height
|
|
);
|
|
}
|
|
}
|