Subversion Repositories cheapmusic

<?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;
} 



}

?>