ikan Uploader :
Directory : /var/www/html/shardahospital.org/pdms/php-qrcode/lib/
Upload File : |
| Current File : /var/www/html/shardahospital.org/pdms/php-qrcode/lib/PlanarYUVLuminanceSource.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 object extends LuminanceSource around an array of YUV data returned from the camera driver,
* with the option to crop to a rectangle within the full data. This can be used to exclude
* superfluous pixels around the perimeter and speed up decoding.
*
* It works for any pixel format where the Y channel is planar and appears first, including
* YCbCr_420_SP and YCbCr_422_SP.
*
* @author dswitkin@google.com (Daniel Switkin)
*/
final class PlanarYUVLuminanceSource extends LuminanceSource
{
private static int $THUMBNAIL_SCALE_FACTOR = 2;
private $dataWidth;
private $dataHeight;
private $left;
private $top;
public function __construct(
private $yuvData,
$dataWidth,
$dataHeight,
$left,
$top,
$width,
$height,
$reverseHorizontal
) {
parent::__construct($width, $height);
if ($left + $width > $dataWidth || $top + $height > $dataHeight) {
throw new \InvalidArgumentException("Crop rectangle does not fit within image data.");
}
$this->dataWidth = $dataWidth;
$this->dataHeight = $dataHeight;
$this->left = $left;
$this->top = $top;
if ($reverseHorizontal) {
$this->reverseHorizontal($width, $height);
}
}
public function rotateCounterClockwise(): void
{
throw new \RuntimeException("This LuminanceSource does not support rotateCounterClockwise");
}
public function rotateCounterClockwise45(): void
{
throw new \RuntimeException("This LuminanceSource does not support rotateCounterClockwise45");
}
public function getRow($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 = []; //new byte[width];
}
$offset = ($y + $this->top) * $this->dataWidth + $this->left;
$row = arraycopy($this->yuvData, $offset, $row, 0, $width);
return $row;
}
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->yuvData;
}
$area = $width * $height;
$matrix = []; //new byte[area];
$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->yuvData, $inputOffset, $matrix, 0, $area);
return $matrix;
}
// Otherwise copy one cropped row at a time.
$yuv = $this->yuvData;
for ($y = 0; $y < $height; $y++) {
$outputOffset = $y * $width;
$matrix = arraycopy($this->yuvData, $inputOffset, $matrix, $outputOffset, $width);
$inputOffset += $this->dataWidth;
}
return $matrix;
}
// @Override
public function isCropSupported(): bool
{
return true;
}
// @Override
public function crop($left, $top, $width, $height): \Zxing\PlanarYUVLuminanceSource
{
return new PlanarYUVLuminanceSource(
$this->yuvData,
$this->dataWidth,
$this->dataHeight,
$this->left + $left,
$this->top + $top,
$width,
$height,
false
);
}
/**
* @return int[]
*/
public function renderThumbnail(): array
{
$width = (int)($this->getWidth() / self::$THUMBNAIL_SCALE_FACTOR);
$height = (int)($this->getHeight() / self::$THUMBNAIL_SCALE_FACTOR);
$pixels = []; //new int[width * height];
$yuv = $this->yuvData;
$inputOffset = $this->top * $this->dataWidth + $this->left;
for ($y = 0; $y < $height; $y++) {
$outputOffset = $y * $width;
for ($x = 0; $x < $width; $x++) {
$grey = ($yuv[$inputOffset + $x * self::$THUMBNAIL_SCALE_FACTOR] & 0xff);
$pixels[$outputOffset + $x] = (0xFF000000 | ($grey * 0x00010101));
}
$inputOffset += $this->dataWidth * self::$THUMBNAIL_SCALE_FACTOR;
}
return $pixels;
}
/**
* @return width of image from {@link #renderThumbnail()}
*/
/*
public int getThumbnailWidth() {
return getWidth() / THUMBNAIL_SCALE_FACTOR;
}*/
/**
* @return height of image from {@link #renderThumbnail()}
*/
/**public function getThumbnailHeight(): int
{
return getHeight() / THUMBNAIL_SCALE_FACTOR;
}*/
/**
*
* @param int $width
* @param int $height
* @return void
*/
private function reverseHorizontal(int $width, int $height): void
{
$yuvData = $this->yuvData;
for ($y = 0, $rowStart = $this->top * $this->dataWidth + $this->left; $y < $height; $y++, $rowStart += $this->dataWidth) {
$middle = (int)round($rowStart + $width / 2);
for ($x1 = $rowStart, $x2 = $rowStart + $width - 1; $x1 < $middle; $x1++, $x2--) {
$temp = $yuvData[$x1];
$yuvData[$x1] = $yuvData[$x2];
$yuvData[$x2] = $temp;
}
}
}
}
Kontol Shell Bypass