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Directory : /var/www/html/vendor/mpdf/mpdf/src/Image/

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Current File : /var/www/html/vendor/mpdf/mpdf/src/Image/Bmp.php

<?php

namespace Mpdf\Image;

use Mpdf\Mpdf;

class Bmp
{

	/**
	 * @var Mpdf
	 */
	private $mpdf;

	public function __construct(Mpdf $mpdf)
	{
		$this->mpdf = $mpdf;
	}

	public function _getBMPimage($data, $file)
	{
		// Adapted from script by Valentin Schmidt
		// http://staff.dasdeck.de/valentin/fpdf/fpdf_bmp/
		$bfOffBits = $this->_fourbytes2int_le(substr($data, 10, 4));
		$width = $this->_fourbytes2int_le(substr($data, 18, 4));
		$height = $this->_fourbytes2int_le(substr($data, 22, 4));
		$flip = ($height < 0);
		if ($flip) {
			$height = -$height;
		}
		$biBitCount = $this->_twobytes2int_le(substr($data, 28, 2));
		$biCompression = $this->_fourbytes2int_le(substr($data, 30, 4));
		$info = ['w' => $width, 'h' => $height];
		if ($biBitCount < 16) {
			$info['cs'] = 'Indexed';
			$info['bpc'] = $biBitCount;
			$palStr = substr($data, 54, $bfOffBits - 54);
			$pal = '';
			$cnt = strlen($palStr) / 4;
			for ($i = 0; $i < $cnt; $i++) {
				$n = 4 * $i;
				$pal .= $palStr[$n + 2] . $palStr[$n + 1] . $palStr[$n];
			}
			$info['pal'] = $pal;
		} else {
			$info['cs'] = 'DeviceRGB';
			$info['bpc'] = 8;
		}

		if ($this->mpdf->restrictColorSpace == 1 || $this->mpdf->PDFX || $this->mpdf->restrictColorSpace == 3) {
			if (($this->mpdf->PDFA && !$this->mpdf->PDFAauto) || ($this->mpdf->PDFX && !$this->mpdf->PDFXauto)) {
				$this->mpdf->PDFAXwarnings[] = "Image cannot be converted to suitable colour space for PDFA or PDFX file - $file - (Image replaced by 'no-image'.)";
			}
			return ['error' => "BMP Image cannot be converted to suitable colour space - $file - (Image replaced by 'no-image'.)"];
		}

		$biXPelsPerMeter = $this->_fourbytes2int_le(substr($data, 38, 4)); // horizontal pixels per meter, usually set to zero
		//$biYPelsPerMeter=$this->_fourbytes2int_le(substr($data,42,4));	// vertical pixels per meter, usually set to zero
		$biXPelsPerMeter = round($biXPelsPerMeter / 1000 * 25.4);
		//$biYPelsPerMeter=round($biYPelsPerMeter/1000 *25.4);
		$info['set-dpi'] = $biXPelsPerMeter;

		switch ($biCompression) {
			case 0:
				$str = substr($data, $bfOffBits);
				break;
			case 1: # BI_RLE8
				$str = $this->rle8_decode(substr($data, $bfOffBits), $width);
				break;
			case 2: # BI_RLE4
				$str = $this->rle4_decode(substr($data, $bfOffBits), $width);
				break;
		}
		$bmpdata = '';
		$padCnt = (4 - ceil($width / (8 / $biBitCount)) % 4) % 4;
		switch ($biBitCount) {
			case 1:
			case 4:
			case 8:
				$w = floor($width / (8 / $biBitCount)) + ($width % (8 / $biBitCount) ? 1 : 0);
				$w_row = $w + $padCnt;
				if ($flip) {
					for ($y = 0; $y < $height; $y++) {
						$y0 = $y * $w_row;
						for ($x = 0; $x < $w; $x++) {
							$bmpdata .= $str[$y0 + $x];
						}
					}
				} else {
					for ($y = $height - 1; $y >= 0; $y--) {
						$y0 = $y * $w_row;
						for ($x = 0; $x < $w; $x++) {
							$bmpdata .= $str[$y0 + $x];
						}
					}
				}
				break;

			case 16:
				$w_row = $width * 2 + $padCnt;
				if ($flip) {
					for ($y = 0; $y < $height; $y++) {
						$y0 = $y * $w_row;
						for ($x = 0; $x < $width; $x++) {
							$n = (ord($str[$y0 + 2 * $x + 1]) * 256 + ord($str[$y0 + 2 * $x]));
							$b = ($n & 31) << 3;
							$g = ($n & 992) >> 2;
							$r = ($n & 31744) >> 7;
							$bmpdata .= chr($r) . chr($g) . chr($b);
						}
					}
				} else {
					for ($y = $height - 1; $y >= 0; $y--) {
						$y0 = $y * $w_row;
						for ($x = 0; $x < $width; $x++) {
							$n = (ord($str[$y0 + 2 * $x + 1]) * 256 + ord($str[$y0 + 2 * $x]));
							$b = ($n & 31) << 3;
							$g = ($n & 992) >> 2;
							$r = ($n & 31744) >> 7;
							$bmpdata .= chr($r) . chr($g) . chr($b);
						}
					}
				}
				break;

			case 24:
			case 32:
				$byteCnt = $biBitCount / 8;
				$w_row = $width * $byteCnt + $padCnt;

				if ($flip) {
					for ($y = 0; $y < $height; $y++) {
						$y0 = $y * $w_row;
						for ($x = 0; $x < $width; $x++) {
							$i = $y0 + $x * $byteCnt; # + 1
							$bmpdata .= $str[$i + 2] . $str[$i + 1] . $str[$i];
						}
					}
				} else {
					for ($y = $height - 1; $y >= 0; $y--) {
						$y0 = $y * $w_row;
						for ($x = 0; $x < $width; $x++) {
							$i = $y0 + $x * $byteCnt; # + 1
							$bmpdata .= $str[$i + 2] . $str[$i + 1] . $str[$i];
						}
					}
				}
				break;

			default:
				return ['error' => 'Error parsing BMP image - Unsupported image biBitCount'];
		}
		if ($this->mpdf->compress) {
			$bmpdata = gzcompress($bmpdata);
			$info['f'] = 'FlateDecode';
		}
		$info['data'] = $bmpdata;
		$info['type'] = 'bmp';
		return $info;
	}

	/**
	 * Read a 4-byte integer from string
	 *
	 * @param $s
	 * @return int
	 */
	private function _fourbytes2int_le($s)
	{
		return (ord($s[3]) << 24) + (ord($s[2]) << 16) + (ord($s[1]) << 8) + ord($s[0]);
	}

	/**
	 * Read a 2-byte integer from string
	 *
	 * @param $s
	 * @return int
	 */
	private function _twobytes2int_le($s)
	{
		return (ord(substr($s, 1, 1)) << 8) + ord(substr($s, 0, 1));
	}

	/**
	 * Decoder for RLE8 compression in windows bitmaps
	 *
	 * @see http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/bitmaps_6x0u.asp
	 * @param $str
	 * @param $width
	 * @return string
	 */
	private function rle8_decode($str, $width)
	{
		$lineWidth = $width + (3 - ($width - 1) % 4);
		$out = '';
		$cnt = strlen($str);
		for ($i = 0; $i < $cnt; $i++) {
			$o = ord($str[$i]);
			if ($o === 0) { # ESCAPE
				$i++;
				switch (ord($str[$i])) {
					case 0: # NEW LINE
						$padCnt = $lineWidth - strlen($out) % $lineWidth;
						if ($padCnt < $lineWidth) {
							$out .= str_repeat(chr(0), $padCnt);# pad line
						}
						break;
					case 1: # END OF FILE
						$padCnt = $lineWidth - strlen($out) % $lineWidth;
						if ($padCnt < $lineWidth) {
							$out .= str_repeat(chr(0), $padCnt);# pad line
						}
						break 2;
					case 2: # DELTA
						$i += 2;
						break;
					default: # ABSOLUTE MODE
						$num = ord($str[$i]);
						for ($j = 0; $j < $num; $j++) {
							$out .= $str[++$i];
						}
						if ($num % 2) {
							$i++;
						}
				}
			} else {
				$out .= str_repeat($str[++$i], $o);
			}
		}
		return $out;
	}

	/**
	 * Decoder for RLE4 compression in windows bitmaps
	 *
	 * @see http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/bitmaps_6x0u.asp
	 * @param $str
	 * @param $width
	 * @return string
	 */
	private function rle4_decode($str, $width)
	{
		$w = floor($width / 2) + ($width % 2);
		$lineWidth = $w + (3 - ( ($width - 1) / 2) % 4);
		$pixels = [];
		$cnt = strlen($str);
		for ($i = 0; $i < $cnt; $i++) {
			$o = ord($str[$i]);
			if ($o === 0) { # ESCAPE
				$i++;
				switch (ord($str[$i])) {
					case 0: # NEW LINE
						while (count($pixels) % $lineWidth !== 0) {
							$pixels[] = 0;
						}
						break;
					case 1: # END OF FILE
						while (count($pixels) % $lineWidth !== 0) {
							$pixels[] = 0;
						}
						break 2;
					case 2: # DELTA
						$i += 2;
						break;
					default: # ABSOLUTE MODE
						$num = ord($str[$i]);
						for ($j = 0; $j < $num; $j++) {
							if ($j % 2 === 0) {
								$c = ord($str[++$i]);
								$pixels[] = ($c & 240) >> 4;
							} else {
								$pixels[] = $c & 15; //FIXME: undefined var
							}
						}
						if ($num % 2) {
							$i++;
						}
				}
			} else {
				$c = ord($str[++$i]);
				for ($j = 0; $j < $o; $j++) {
					$pixels[] = ($j % 2 === 0 ? ($c & 240) >> 4 : $c & 15);
				}
			}
		}

		$out = '';
		if (count($pixels) % 2) {
			$pixels[] = 0;
		}
		$cnt = count($pixels) / 2;
		for ($i = 0; $i < $cnt; $i++) {
			$out .= chr(16 * $pixels[2 * $i] + $pixels[2 * $i + 1]);
		}
		return $out;
	}
}

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