260 lines
7.1 KiB
PHP
260 lines
7.1 KiB
PHP
<?php
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class bmp
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{
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var $mpdf = null;
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public function __construct(mPDF $mpdf)
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{
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$this->mpdf = $mpdf;
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}
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function _getBMPimage($data, $file)
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{
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$info = array();
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// Adapted from script by Valentin Schmidt
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// http://staff.dasdeck.de/valentin/fpdf/fpdf_bmp/
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$bfOffBits = $this->_fourbytes2int_le(substr($data, 10, 4));
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$width = $this->_fourbytes2int_le(substr($data, 18, 4));
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$height = $this->_fourbytes2int_le(substr($data, 22, 4));
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$flip = ($height < 0);
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if ($flip)
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$height = -$height;
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$biBitCount = $this->_twobytes2int_le(substr($data, 28, 2));
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$biCompression = $this->_fourbytes2int_le(substr($data, 30, 4));
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$info = array('w' => $width, 'h' => $height);
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if ($biBitCount < 16) {
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$info['cs'] = 'Indexed';
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$info['bpc'] = $biBitCount;
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$palStr = substr($data, 54, ($bfOffBits - 54));
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$pal = '';
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$cnt = strlen($palStr) / 4;
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for ($i = 0; $i < $cnt; $i++) {
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$n = 4 * $i;
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$pal .= $palStr[$n + 2] . $palStr[$n + 1] . $palStr[$n];
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}
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$info['pal'] = $pal;
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} else {
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$info['cs'] = 'DeviceRGB';
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$info['bpc'] = 8;
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}
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if ($this->mpdf->restrictColorSpace == 1 || $this->mpdf->PDFX || $this->mpdf->restrictColorSpace == 3) {
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if (($this->mpdf->PDFA && !$this->mpdf->PDFAauto) || ($this->mpdf->PDFX && !$this->mpdf->PDFXauto)) {
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$this->mpdf->PDFAXwarnings[] = "Image cannot be converted to suitable colour space for PDFA or PDFX file - " . $file . " - (Image replaced by 'no-image'.)";
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}
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return array('error' => "BMP Image cannot be converted to suitable colour space - " . $file . " - (Image replaced by 'no-image'.)");
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}
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$biXPelsPerMeter = $this->_fourbytes2int_le(substr($data, 38, 4)); // horizontal pixels per meter, usually set to zero
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//$biYPelsPerMeter=$this->_fourbytes2int_le(substr($data,42,4)); // vertical pixels per meter, usually set to zero
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$biXPelsPerMeter = round($biXPelsPerMeter / 1000 * 25.4);
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//$biYPelsPerMeter=round($biYPelsPerMeter/1000 *25.4);
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$info['set-dpi'] = $biXPelsPerMeter;
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switch ($biCompression) {
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case 0:
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$str = substr($data, $bfOffBits);
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break;
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case 1: # BI_RLE8
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$str = $this->rle8_decode(substr($data, $bfOffBits), $width);
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break;
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case 2: # BI_RLE4
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$str = $this->rle4_decode(substr($data, $bfOffBits), $width);
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break;
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}
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$bmpdata = '';
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$padCnt = (4 - ceil(($width / (8 / $biBitCount))) % 4) % 4;
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switch ($biBitCount) {
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case 1:
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case 4:
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case 8:
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$w = floor($width / (8 / $biBitCount)) + ($width % (8 / $biBitCount) ? 1 : 0);
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$w_row = $w + $padCnt;
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if ($flip) {
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for ($y = 0; $y < $height; $y++) {
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$y0 = $y * $w_row;
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for ($x = 0; $x < $w; $x++)
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$bmpdata .= $str[$y0 + $x];
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}
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} else {
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for ($y = $height - 1; $y >= 0; $y--) {
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$y0 = $y * $w_row;
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for ($x = 0; $x < $w; $x++)
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$bmpdata .= $str[$y0 + $x];
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}
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}
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break;
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case 16:
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$w_row = $width * 2 + $padCnt;
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if ($flip) {
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for ($y = 0; $y < $height; $y++) {
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$y0 = $y * $w_row;
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for ($x = 0; $x < $width; $x++) {
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$n = (ord($str[$y0 + 2 * $x + 1]) * 256 + ord($str[$y0 + 2 * $x]));
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$b = ($n & 31) << 3;
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$g = ($n & 992) >> 2;
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$r = ($n & 31744) >> 7128;
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$bmpdata .= chr($r) . chr($g) . chr($b);
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}
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}
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} else {
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for ($y = $height - 1; $y >= 0; $y--) {
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$y0 = $y * $w_row;
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for ($x = 0; $x < $width; $x++) {
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$n = (ord($str[$y0 + 2 * $x + 1]) * 256 + ord($str[$y0 + 2 * $x]));
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$b = ($n & 31) << 3;
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$g = ($n & 992) >> 2;
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$r = ($n & 31744) >> 7;
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$bmpdata .= chr($r) . chr($g) . chr($b);
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}
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}
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}
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break;
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case 24:
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case 32:
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$byteCnt = $biBitCount / 8;
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$w_row = $width * $byteCnt + $padCnt;
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if ($flip) {
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for ($y = 0; $y < $height; $y++) {
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$y0 = $y * $w_row;
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for ($x = 0; $x < $width; $x++) {
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$i = $y0 + $x * $byteCnt; # + 1
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$bmpdata .= $str[$i + 2] . $str[$i + 1] . $str[$i];
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}
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}
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} else {
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for ($y = $height - 1; $y >= 0; $y--) {
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$y0 = $y * $w_row;
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for ($x = 0; $x < $width; $x++) {
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$i = $y0 + $x * $byteCnt; # + 1
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$bmpdata .= $str[$i + 2] . $str[$i + 1] . $str[$i];
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}
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}
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}
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break;
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default:
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return array('error' => 'Error parsing BMP image - Unsupported image biBitCount');
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}
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if ($this->mpdf->compress) {
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$bmpdata = gzcompress($bmpdata);
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$info['f'] = 'FlateDecode';
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}
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$info['data'] = $bmpdata;
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$info['type'] = 'bmp';
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return $info;
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}
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function _fourbytes2int_le($s)
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{
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//Read a 4-byte integer from string
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return (ord($s[3]) << 24) + (ord($s[2]) << 16) + (ord($s[1]) << 8) + ord($s[0]);
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}
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function _twobytes2int_le($s)
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{
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//Read a 2-byte integer from string
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return (ord(substr($s, 1, 1)) << 8) + ord(substr($s, 0, 1));
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}
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# Decoder for RLE8 compression in windows bitmaps
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# see http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/bitmaps_6x0u.asp
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function rle8_decode($str, $width)
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{
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$lineWidth = $width + (3 - ($width - 1) % 4);
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$out = '';
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$cnt = strlen($str);
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for ($i = 0; $i < $cnt; $i++) {
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$o = ord($str[$i]);
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switch ($o) {
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case 0: # ESCAPE
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$i++;
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switch (ord($str[$i])) {
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case 0: # NEW LINE
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$padCnt = $lineWidth - strlen($out) % $lineWidth;
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if ($padCnt < $lineWidth)
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$out .= str_repeat(chr(0), $padCnt);# pad line
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break;
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case 1: # END OF FILE
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$padCnt = $lineWidth - strlen($out) % $lineWidth;
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if ($padCnt < $lineWidth)
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$out .= str_repeat(chr(0), $padCnt);# pad line
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break 3;
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case 2: # DELTA
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$i += 2;
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break;
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default: # ABSOLUTE MODE
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$num = ord($str[$i]);
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for ($j = 0; $j < $num; $j++)
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$out .= $str[++$i];
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if ($num % 2)
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$i++;
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}
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break;
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default:
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$out .= str_repeat($str[++$i], $o);
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}
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}
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return $out;
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}
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# Decoder for RLE4 compression in windows bitmaps
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# see http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/bitmaps_6x0u.asp
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function rle4_decode($str, $width)
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{
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$w = floor($width / 2) + ($width % 2);
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$lineWidth = $w + (3 - ( ($width - 1) / 2) % 4);
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$pixels = array();
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$cnt = strlen($str);
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for ($i = 0; $i < $cnt; $i++) {
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$o = ord($str[$i]);
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switch ($o) {
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case 0: # ESCAPE
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$i++;
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switch (ord($str[$i])) {
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case 0: # NEW LINE
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while (count($pixels) % $lineWidth != 0)
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$pixels[] = 0;
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break;
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case 1: # END OF FILE
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while (count($pixels) % $lineWidth != 0)
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$pixels[] = 0;
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break 3;
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case 2: # DELTA
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$i += 2;
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break;
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default: # ABSOLUTE MODE
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$num = ord($str[$i]);
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for ($j = 0; $j < $num; $j++) {
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if ($j % 2 == 0) {
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$c = ord($str[++$i]);
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$pixels[] = ($c & 240) >> 4;
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} else
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$pixels[] = $c & 15;
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}
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if ($num % 2)
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$i++;
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}
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break;
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default:
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$c = ord($str[++$i]);
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for ($j = 0; $j < $o; $j++)
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$pixels[] = ($j % 2 == 0 ? ($c & 240) >> 4 : $c & 15);
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}
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}
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$out = '';
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if (count($pixels) % 2)
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$pixels[] = 0;
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$cnt = count($pixels) / 2;
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for ($i = 0; $i < $cnt; $i++)
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$out .= chr(16 * $pixels[2 * $i] + $pixels[2 * $i + 1]);
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return $out;
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}
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}
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