248 lines
7.7 KiB
PHP
248 lines
7.7 KiB
PHP
<?php
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class bmp {
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var $mpdf = null;
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function bmp(&$mpdf) {
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$this->mpdf = $mpdf;
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}
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function _getBMPimage($data, $file) {
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$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) $height =-$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'] = $pal;
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}
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else{
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$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)) { $this->mpdf->PDFAXwarnings[] = "Image cannot be converted to suitable colour space for PDFA or PDFX file - ".$file." - (Image replaced by 'no-image'.)"; }
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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; $g = ($n & 992)>>2; $r = ($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; $g = ($n & 992)>>2; $r = ($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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//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($s) {
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//Read a 2-byte integer from string
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return (ord(substr($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, $width){
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$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) $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) $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) $i++;
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}
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break;
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default:
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$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, $width){
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$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) $i++;
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}
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break;
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default:
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$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) $pixels[]=0;
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$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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?>
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