[795] | 1 | <?php |
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| 2 | require_once('fpdf.php'); |
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| 3 | |
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| 4 | class VariableStream |
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| 5 | { |
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| 6 | // Stream handler to read from global variables |
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| 7 | var $varname; |
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| 8 | var $position; |
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| 9 | |
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| 10 | function stream_open($path, $mode, $options, &$opened_path) |
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| 11 | { |
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| 12 | $url = parse_url($path); |
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| 13 | $this->varname = $url['host']; |
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| 14 | if(!isset($GLOBALS[$this->varname])) |
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| 15 | { |
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| 16 | trigger_error('Global variable '.$this->varname.' does not exist', E_USER_WARNING); |
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| 17 | return false; |
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| 18 | } |
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| 19 | $this->position = 0; |
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| 20 | return true; |
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| 21 | } |
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| 22 | |
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| 23 | function stream_read($count) |
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| 24 | { |
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| 25 | $ret = substr($GLOBALS[$this->varname], $this->position, $count); |
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| 26 | $this->position += strlen($ret); |
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| 27 | return $ret; |
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| 28 | } |
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| 29 | |
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| 30 | function stream_eof() |
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| 31 | { |
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| 32 | return $this->position >= strlen($GLOBALS[$this->varname]); |
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| 33 | } |
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| 34 | |
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| 35 | function stream_tell() |
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| 36 | { |
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| 37 | return $this->position; |
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| 38 | } |
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| 39 | |
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| 40 | function stream_seek($offset, $whence) |
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| 41 | { |
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| 42 | if($whence==SEEK_SET) |
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| 43 | { |
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| 44 | $this->position = $offset; |
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| 45 | return true; |
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| 46 | } |
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| 47 | return false; |
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| 48 | } |
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| 49 | } |
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| 50 | |
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| 51 | class MEM_IMAGE extends FPDF |
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| 52 | { |
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| 53 | // (c) Xavier Nicolay |
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| 54 | // V1.01 : 2006-11-19 |
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| 55 | |
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| 56 | // |
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| 57 | // CONSTRUCTOR |
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| 58 | // |
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| 59 | function MEM_IMAGE($orientation='P',$unit='mm',$format='A4') |
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| 60 | { |
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| 61 | $this->FPDF($orientation, $unit, $format); |
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| 62 | //Register var stream protocol (requires PHP>=4.3.2) |
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| 63 | if(function_exists('stream_wrapper_register')) |
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| 64 | stream_wrapper_register('var','VariableStream'); |
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| 65 | } |
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| 66 | |
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| 67 | // |
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| 68 | // PRIVATE FUNCTIONS |
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| 69 | // |
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| 70 | function _readstr($var, &$pos, $n) |
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| 71 | { |
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| 72 | //Read some bytes from string |
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| 73 | $string = substr($var, $pos, $n); |
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| 74 | $pos += $n; |
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| 75 | return $string; |
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| 76 | } |
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| 77 | |
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| 78 | function _readstr_int($var, &$pos) |
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| 79 | { |
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| 80 | //Read a 4-byte integer from string |
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| 81 | $i =ord($this->_readstr($var, $pos, 1))<<24; |
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| 82 | $i+=ord($this->_readstr($var, $pos, 1))<<16; |
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| 83 | $i+=ord($this->_readstr($var, $pos, 1))<<8; |
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| 84 | $i+=ord($this->_readstr($var, $pos, 1)); |
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| 85 | return $i; |
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| 86 | } |
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| 87 | |
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| 88 | function _parsemempng($var) |
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| 89 | { |
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| 90 | $pos=0; |
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| 91 | //Check signature |
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| 92 | $sig = $this->_readstr($var,$pos, 8); |
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| 93 | if($sig != chr(137).'PNG'.chr(13).chr(10).chr(26).chr(10)) |
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| 94 | $this->Error('Not a PNG image'); |
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| 95 | //Read header chunk |
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| 96 | $this->_readstr($var,$pos,4); |
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| 97 | $ihdr = $this->_readstr($var,$pos,4); |
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| 98 | if( $ihdr != 'IHDR') |
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| 99 | $this->Error('Incorrect PNG Image'); |
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| 100 | $w=$this->_readstr_int($var,$pos); |
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| 101 | $h=$this->_readstr_int($var,$pos); |
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| 102 | $bpc=ord($this->_readstr($var,$pos,1)); |
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| 103 | if($bpc>8) |
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| 104 | $this->Error('16-bit depth not supported: '.$file); |
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| 105 | $ct=ord($this->_readstr($var,$pos,1)); |
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| 106 | if($ct==0) |
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| 107 | $colspace='DeviceGray'; |
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| 108 | elseif($ct==2) |
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| 109 | $colspace='DeviceRGB'; |
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| 110 | elseif($ct==3) |
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| 111 | $colspace='Indexed'; |
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| 112 | else |
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| 113 | $this->Error('Alpha channel not supported: '.$file); |
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| 114 | if(ord($this->_readstr($var,$pos,1))!=0) |
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| 115 | $this->Error('Unknown compression method: '.$file); |
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| 116 | if(ord($this->_readstr($var,$pos,1))!=0) |
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| 117 | $this->Error('Unknown filter method: '.$file); |
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| 118 | if(ord($this->_readstr($var,$pos,1))!=0) |
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| 119 | $this->Error('Interlacing not supported: '.$file); |
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| 120 | $this->_readstr($var,$pos,4); |
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| 121 | $parms='/DecodeParms <</Predictor 15 /Colors '.($ct==2 ? 3 : 1).' /BitsPerComponent '.$bpc.' /Columns '.$w.'>>'; |
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| 122 | //Scan chunks looking for palette, transparency and image data |
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| 123 | $pal=''; |
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| 124 | $trns=''; |
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| 125 | $data=''; |
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| 126 | do |
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| 127 | { |
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| 128 | $n=$this->_readstr_int($var,$pos); |
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| 129 | $type=$this->_readstr($var,$pos,4); |
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| 130 | if($type=='PLTE') |
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| 131 | { |
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| 132 | //Read palette |
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| 133 | $pal=$this->_readstr($var,$pos,$n); |
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| 134 | $this->_readstr($var,$pos,4); |
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| 135 | } |
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| 136 | elseif($type=='tRNS') |
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| 137 | { |
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| 138 | //Read transparency info |
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| 139 | $t=$this->_readstr($var,$pos,$n); |
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| 140 | if($ct==0) |
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| 141 | $trns=array(ord(substr($t,1,1))); |
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| 142 | elseif($ct==2) |
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| 143 | $trns=array(ord(substr($t,1,1)),ord(substr($t,3,1)),ord(substr($t,5,1))); |
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| 144 | else |
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| 145 | { |
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| 146 | $p=strpos($t,chr(0)); |
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| 147 | if(is_int($p)) |
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| 148 | $trns=array($p); |
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| 149 | } |
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| 150 | $this->_readstr($var,$pos,4); |
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| 151 | } |
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| 152 | elseif($type=='IDAT') |
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| 153 | { |
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| 154 | //Read image data block |
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| 155 | $data.=$this->_readstr($var,$pos,$n); |
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| 156 | $this->_readstr($var,$pos,4); |
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| 157 | } |
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| 158 | elseif($type=='IEND') |
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| 159 | break; |
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| 160 | else |
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| 161 | $this->_readstr($var,$pos,$n+4); |
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| 162 | } |
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| 163 | while($n); |
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| 164 | if($colspace=='Indexed' and empty($pal)) |
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| 165 | $this->Error('Missing palette in '.$file); |
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| 166 | return array('w'=>$w, |
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| 167 | 'h'=>$h, |
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| 168 | 'cs'=>$colspace, |
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| 169 | 'bpc'=>$bpc, |
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| 170 | 'f'=>'FlateDecode', |
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| 171 | 'parms'=>$parms, |
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| 172 | 'pal'=>$pal, |
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| 173 | 'trns'=>$trns, |
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| 174 | 'data'=>$data); |
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| 175 | } |
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| 176 | |
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| 177 | /********************/ |
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| 178 | /* PUBLIC FUNCTIONS */ |
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| 179 | /********************/ |
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| 180 | function MemImage($data, $x, $y, $w=0, $h=0, $link='') |
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| 181 | { |
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| 182 | //Put the PNG image stored in $data |
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| 183 | $id = md5($data); |
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| 184 | if(!isset($this->images[$id])) |
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| 185 | { |
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| 186 | $info = $this->_parsemempng( $data ); |
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| 187 | $info['i'] = count($this->images)+1; |
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| 188 | $this->images[$id]=$info; |
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| 189 | } |
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| 190 | else |
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| 191 | $info=$this->images[$id]; |
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| 192 | |
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| 193 | //Automatic width and height calculation if needed |
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| 194 | if($w==0 and $h==0) |
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| 195 | { |
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| 196 | //Put image at 72 dpi |
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| 197 | $w=$info['w']/$this->k; |
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| 198 | $h=$info['h']/$this->k; |
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| 199 | } |
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| 200 | if($w==0) |
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| 201 | $w=$h*$info['w']/$info['h']; |
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| 202 | if($h==0) |
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| 203 | $h=$w*$info['h']/$info['w']; |
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| 204 | $this->_out(sprintf('q %.2f 0 0 %.2f %.2f %.2f cm /I%d Do Q',$w*$this->k,$h*$this->k,$x*$this->k,($this->h-($y+$h))*$this->k,$info['i'])); |
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| 205 | if($link) |
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| 206 | $this->Link($x,$y,$w,$h,$link); |
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| 207 | } |
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| 208 | |
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| 209 | function GDImage($im, $x, $y, $w=0, $h=0, $link='') |
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| 210 | { |
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| 211 | //Put the GD image $im |
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| 212 | ob_start(); |
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| 213 | imagepng($im); |
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| 214 | $data = ob_get_contents(); |
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| 215 | ob_end_clean(); |
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| 216 | $this->MemImage($data, $x, $y, $w, $h, $link); |
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| 217 | } |
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| 218 | |
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| 219 | } |
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| 220 | ?> |
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