<?php
class bmp {
var $mpdf = null;
function bmp(&$mpdf) {
$this->mpdf = $mpdf;
}
function _getBMPimage($data, $file) {
$info = array();
// 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));
$info = array('w'=>$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 array('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)>>7128;
$bmpdata .= chr($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 array('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 $info;
}
function _fourbytes2int_le($s) {
//Read a 4-byte integer from string
return (ord($s[3])<<24) + (ord($s[2])<<16) + (ord($s[1])<<8) + ord($s[0]);
}
function _twobytes2int_le($s) {
//Read a 2-byte integer from string
return (ord(substr($s, 1, 1))<<8) + ord(substr($s, 0, 1));
}
# Decoder for RLE8 compression in windows bitmaps
# see http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/bitmaps_6x0u.asp
function rle8_decode ($str, $width){
$lineWidth = $width + (3 - ($width-1) % 4);
$out = '';
$cnt = strlen($str);
for ($i=0;$i<$cnt;$i++){
$o = ord($str[$i]);
switch ($o){
case 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 3;
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++;
}
break;
default:
$out .= str_repeat($str[++$i], $o);
}
}
return $out;
}
# Decoder for RLE4 compression in windows bitmaps
# see http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/bitmaps_6x0u.asp
function rle4_decode ($str, $width){
$w = floor($width/2) + ($width % 2);
$lineWidth = $w + (3 - ( ($width-1) / 2) % 4);
$pixels = array();
$cnt = strlen($str);
for ($i=0;$i<$cnt;$i++){
$o = ord($str[$i]);
switch ($o){
case 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 3;
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[] = $c & 15;
}
if ($num % 2) $i++;
}
break;
default:
$c = ord($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;
}
}
?>
