/
Cpdf.php
3076 lines (2908 loc) · 98.1 KB
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Cpdf.php
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<?php
/**
* Cpdf
*
* http://www.ros.co.nz/pdf
*
* A PHP class to provide the basic functionality to create a pdf document without
* any requirement for additional modules.
*
* Note that they companion class CezPdf can be used to extend this class and dramatically
* simplify the creation of documents.
*
* IMPORTANT NOTE
* there is no warranty, implied or otherwise with this software.
*
* LICENCE
* This code has been placed in the Public Domain for all to enjoy.
*
* @author Wayne Munro <pdf@ros.co.nz>
* @version 009
* @package Cpdf
*/
class Cpdf {
/**
* the current number of pdf objects in the document
*/
var $numObj=0;
/**
* this array contains all of the pdf objects, ready for final assembly
*/
var $objects = array();
/**
* the objectId (number within the objects array) of the document catalog
*/
var $catalogId;
/**
* array carrying information about the fonts that the system currently knows about
* used to ensure that a font is not loaded twice, among other things
*/
var $fonts=array();
/**
* a record of the current font
*/
var $currentFont='';
/**
* the current base font
*/
var $currentBaseFont='';
/**
* the number of the current font within the font array
*/
var $currentFontNum=0;
/**
*
*/
var $currentNode;
/**
* object number of the current page
*/
var $currentPage;
/**
* object number of the currently active contents block
*/
var $currentContents;
/**
* number of fonts within the system
*/
var $numFonts=0;
/**
* current colour for fill operations, defaults to inactive value, all three components should be between 0 and 1 inclusive when active
*/
var $currentColour=array('r'=>-1,'g'=>-1,'b'=>-1);
/**
* current colour for stroke operations (lines etc.)
*/
var $currentStrokeColour=array('r'=>-1,'g'=>-1,'b'=>-1);
/**
* current style that lines are drawn in
*/
var $currentLineStyle='';
/**
* an array which is used to save the state of the document, mainly the colours and styles
* it is used to temporarily change to another state, the change back to what it was before
*/
var $stateStack = array();
/**
* number of elements within the state stack
*/
var $nStateStack = 0;
/**
* number of page objects within the document
*/
var $numPages=0;
/**
* object Id storage stack
*/
var $stack=array();
/**
* number of elements within the object Id storage stack
*/
var $nStack=0;
/**
* an array which contains information about the objects which are not firmly attached to pages
* these have been added with the addObject function
*/
var $looseObjects=array();
/**
* array contains infomation about how the loose objects are to be added to the document
*/
var $addLooseObjects=array();
/**
* the objectId of the information object for the document
* this contains authorship, title etc.
*/
var $infoObject=0;
/**
* number of images being tracked within the document
*/
var $numImages=0;
/**
* an array containing options about the document
* it defaults to turning on the compression of the objects
*/
var $options=array('compression'=>1);
/**
* the objectId of the first page of the document
*/
var $firstPageId;
/**
* used to track the last used value of the inter-word spacing, this is so that it is known
* when the spacing is changed.
*/
var $wordSpaceAdjust=0;
/**
* the object Id of the procset object
*/
var $procsetObjectId;
/**
* store the information about the relationship between font families
* this used so that the code knows which font is the bold version of another font, etc.
* the value of this array is initialised in the constuctor function.
*/
var $fontFamilies = array();
/**
* track if the current font is bolded or italicised
*/
var $currentTextState = '';
/**
* messages are stored here during processing, these can be selected afterwards to give some useful debug information
*/
var $messages='';
/**
* the ancryption array for the document encryption is stored here
*/
var $arc4='';
/**
* the object Id of the encryption information
*/
var $arc4_objnum=0;
/**
* the file identifier, used to uniquely identify a pdf document
*/
var $fileIdentifier='';
/**
* a flag to say if a document is to be encrypted or not
*/
var $encrypted=0;
/**
* the ancryption key for the encryption of all the document content (structure is not encrypted)
*/
var $encryptionKey='';
/**
* array which forms a stack to keep track of nested callback functions
*/
var $callback = array();
/**
* the number of callback functions in the callback array
*/
var $nCallback = 0;
/**
* store label->id pairs for named destinations, these will be used to replace internal links
* done this way so that destinations can be defined after the location that links to them
*/
var $destinations = array();
/**
* store the stack for the transaction commands, each item in here is a record of the values of all the
* variables within the class, so that the user can rollback at will (from each 'start' command)
* note that this includes the objects array, so these can be large.
*/
var $checkpoint = '';
/**
* class constructor
* this will start a new document
* @var array array of 4 numbers, defining the bottom left and upper right corner of the page. first two are normally zero.
*/
function Cpdf ($pageSize=array(0,0,612,792)){
$this->newDocument($pageSize);
// also initialize the font families that are known about already
$this->setFontFamily('init');
// $this->fileIdentifier = md5('xxxxxxxx'.time());
}
/**
* Document object methods (internal use only)
*
* There is about one object method for each type of object in the pdf document
* Each function has the same call list ($id,$action,$options).
* $id = the object ID of the object, or what it is to be if it is being created
* $action = a string specifying the action to be performed, though ALL must support:
* 'new' - create the object with the id $id
* 'out' - produce the output for the pdf object
* $options = optional, a string or array containing the various parameters for the object
*
* These, in conjunction with the output function are the ONLY way for output to be produced
* within the pdf 'file'.
*/
/**
*destination object, used to specify the location for the user to jump to, presently on opening
*/
function o_destination($id,$action,$options=''){
if ($action!='new'){
$o =& $this->objects[$id];
}
switch($action){
case 'new':
$this->objects[$id]=array('t'=>'destination','info'=>array());
$tmp = '';
switch ($options['type']){
case 'XYZ':
case 'FitR':
$tmp = ' '.$options['p3'].$tmp;
case 'FitH':
case 'FitV':
case 'FitBH':
case 'FitBV':
$tmp = ' '.$options['p1'].' '.$options['p2'].$tmp;
case 'Fit':
case 'FitB':
$tmp = $options['type'].$tmp;
$this->objects[$id]['info']['string']=$tmp;
$this->objects[$id]['info']['page']=$options['page'];
}
break;
case 'out':
$tmp = $o['info'];
$res="\n".$id." 0 obj\n".'['.$tmp['page'].' 0 R /'.$tmp['string']."]\nendobj\n";
return $res;
break;
}
}
/**
* set the viewer preferences
*/
function o_viewerPreferences($id,$action,$options=''){
if ($action!='new'){
$o =& $this->objects[$id];
}
switch ($action){
case 'new':
$this->objects[$id]=array('t'=>'viewerPreferences','info'=>array());
break;
case 'add':
foreach($options as $k=>$v){
switch ($k){
case 'HideToolbar':
case 'HideMenubar':
case 'HideWindowUI':
case 'FitWindow':
case 'CenterWindow':
case 'NonFullScreenPageMode':
case 'Direction':
$o['info'][$k]=$v;
break;
}
}
break;
case 'out':
$res="\n".$id." 0 obj\n".'<< ';
foreach($o['info'] as $k=>$v){
$res.="\n/".$k.' '.$v;
}
$res.="\n>>\n";
return $res;
break;
}
}
/**
* define the document catalog, the overall controller for the document
*/
function o_catalog($id,$action,$options=''){
if ($action!='new'){
$o =& $this->objects[$id];
}
switch ($action){
case 'new':
$this->objects[$id]=array('t'=>'catalog','info'=>array());
$this->catalogId=$id;
break;
case 'outlines':
case 'pages':
case 'openHere':
$o['info'][$action]=$options;
break;
case 'viewerPreferences':
if (!isset($o['info']['viewerPreferences'])){
$this->numObj++;
$this->o_viewerPreferences($this->numObj,'new');
$o['info']['viewerPreferences']=$this->numObj;
}
$vp = $o['info']['viewerPreferences'];
$this->o_viewerPreferences($vp,'add',$options);
break;
case 'out':
$res="\n".$id." 0 obj\n".'<< /Type /Catalog';
foreach($o['info'] as $k=>$v){
switch($k){
case 'outlines':
$res.="\n".'/Outlines '.$v.' 0 R';
break;
case 'pages':
$res.="\n".'/Pages '.$v.' 0 R';
break;
case 'viewerPreferences':
$res.="\n".'/ViewerPreferences '.$o['info']['viewerPreferences'].' 0 R';
break;
case 'openHere':
$res.="\n".'/OpenAction '.$o['info']['openHere'].' 0 R';
break;
}
}
$res.=" >>\nendobj";
return $res;
break;
}
}
/**
* object which is a parent to the pages in the document
*/
function o_pages($id,$action,$options=''){
if ($action!='new'){
$o =& $this->objects[$id];
}
switch ($action){
case 'new':
$this->objects[$id]=array('t'=>'pages','info'=>array());
$this->o_catalog($this->catalogId,'pages',$id);
break;
case 'page':
if (!is_array($options)){
// then it will just be the id of the new page
$o['info']['pages'][]=$options;
} else {
// then it should be an array having 'id','rid','pos', where rid=the page to which this one will be placed relative
// and pos is either 'before' or 'after', saying where this page will fit.
if (isset($options['id']) && isset($options['rid']) && isset($options['pos'])){
$i = array_search($options['rid'],$o['info']['pages']);
if (isset($o['info']['pages'][$i]) && $o['info']['pages'][$i]==$options['rid']){
// then there is a match
// make a space
switch ($options['pos']){
case 'before':
$k = $i;
break;
case 'after':
$k=$i+1;
break;
default:
$k=-1;
break;
}
if ($k>=0){
for ($j=count($o['info']['pages'])-1;$j>=$k;$j--){
$o['info']['pages'][$j+1]=$o['info']['pages'][$j];
}
$o['info']['pages'][$k]=$options['id'];
}
}
}
}
break;
case 'procset':
$o['info']['procset']=$options;
break;
case 'mediaBox':
$o['info']['mediaBox']=$options; // which should be an array of 4 numbers
break;
case 'font':
$o['info']['fonts'][]=array('objNum'=>$options['objNum'],'fontNum'=>$options['fontNum']);
break;
case 'xObject':
$o['info']['xObjects'][]=array('objNum'=>$options['objNum'],'label'=>$options['label']);
break;
case 'out':
if (count($o['info']['pages'])){
$res="\n".$id." 0 obj\n<< /Type /Pages\n/Kids [";
foreach($o['info']['pages'] as $k=>$v){
$res.=$v." 0 R\n";
}
$res.="]\n/Count ".count($this->objects[$id]['info']['pages']);
if ((isset($o['info']['fonts']) && count($o['info']['fonts'])) || isset($o['info']['procset'])){
$res.="\n/Resources <<";
if (isset($o['info']['procset'])){
$res.="\n/ProcSet ".$o['info']['procset']." 0 R";
}
if (isset($o['info']['fonts']) && count($o['info']['fonts'])){
$res.="\n/Font << ";
foreach($o['info']['fonts'] as $finfo){
$res.="\n/F".$finfo['fontNum']." ".$finfo['objNum']." 0 R";
}
$res.=" >>";
}
if (isset($o['info']['xObjects']) && count($o['info']['xObjects'])){
$res.="\n/XObject << ";
foreach($o['info']['xObjects'] as $finfo){
$res.="\n/".$finfo['label']." ".$finfo['objNum']." 0 R";
}
$res.=" >>";
}
$res.="\n>>";
if (isset($o['info']['mediaBox'])){
$tmp=$o['info']['mediaBox'];
$res.="\n/MediaBox [".sprintf('%.3f',$tmp[0]).' '.sprintf('%.3f',$tmp[1]).' '.sprintf('%.3f',$tmp[2]).' '.sprintf('%.3f',$tmp[3]).']';
}
}
$res.="\n >>\nendobj";
} else {
$res="\n".$id." 0 obj\n<< /Type /Pages\n/Count 0\n>>\nendobj";
}
return $res;
break;
}
}
/**
* define the outlines in the doc, empty for now
*/
function o_outlines($id,$action,$options=''){
if ($action!='new'){
$o =& $this->objects[$id];
}
switch ($action){
case 'new':
$this->objects[$id]=array('t'=>'outlines','info'=>array('outlines'=>array()));
$this->o_catalog($this->catalogId,'outlines',$id);
break;
case 'outline':
$o['info']['outlines'][]=$options;
break;
case 'out':
if (count($o['info']['outlines'])){
$res="\n".$id." 0 obj\n<< /Type /Outlines /Kids [";
foreach($o['info']['outlines'] as $k=>$v){
$res.=$v." 0 R ";
}
$res.="] /Count ".count($o['info']['outlines'])." >>\nendobj";
} else {
$res="\n".$id." 0 obj\n<< /Type /Outlines /Count 0 >>\nendobj";
}
return $res;
break;
}
}
/**
* an object to hold the font description
*/
function o_font($id,$action,$options=''){
if ($action!='new'){
$o =& $this->objects[$id];
}
switch ($action){
case 'new':
$this->objects[$id]=array('t'=>'font','info'=>array('name'=>$options['name'],'SubType'=>'Type1'));
$fontNum=$this->numFonts;
$this->objects[$id]['info']['fontNum']=$fontNum;
// deal with the encoding and the differences
if (isset($options['differences'])){
// then we'll need an encoding dictionary
$this->numObj++;
$this->o_fontEncoding($this->numObj,'new',$options);
$this->objects[$id]['info']['encodingDictionary']=$this->numObj;
} else if (isset($options['encoding'])){
// we can specify encoding here
switch($options['encoding']){
case 'WinAnsiEncoding':
case 'MacRomanEncoding':
case 'MacExpertEncoding':
$this->objects[$id]['info']['encoding']=$options['encoding'];
break;
case 'none':
break;
default:
$this->objects[$id]['info']['encoding']='WinAnsiEncoding';
break;
}
} else {
$this->objects[$id]['info']['encoding']='WinAnsiEncoding';
}
// also tell the pages node about the new font
$this->o_pages($this->currentNode,'font',array('fontNum'=>$fontNum,'objNum'=>$id));
break;
case 'add':
foreach ($options as $k=>$v){
switch ($k){
case 'BaseFont':
$o['info']['name'] = $v;
break;
case 'FirstChar':
case 'LastChar':
case 'Widths':
case 'FontDescriptor':
case 'SubType':
$this->addMessage('o_font '.$k." : ".$v);
$o['info'][$k] = $v;
break;
}
}
break;
case 'out':
$res="\n".$id." 0 obj\n<< /Type /Font\n/Subtype /".$o['info']['SubType']."\n";
$res.="/Name /F".$o['info']['fontNum']."\n";
$res.="/BaseFont /".$o['info']['name']."\n";
if (isset($o['info']['encodingDictionary'])){
// then place a reference to the dictionary
$res.="/Encoding ".$o['info']['encodingDictionary']." 0 R\n";
} else if (isset($o['info']['encoding'])){
// use the specified encoding
$res.="/Encoding /".$o['info']['encoding']."\n";
}
if (isset($o['info']['FirstChar'])){
$res.="/FirstChar ".$o['info']['FirstChar']."\n";
}
if (isset($o['info']['LastChar'])){
$res.="/LastChar ".$o['info']['LastChar']."\n";
}
if (isset($o['info']['Widths'])){
$res.="/Widths ".$o['info']['Widths']." 0 R\n";
}
if (isset($o['info']['FontDescriptor'])){
$res.="/FontDescriptor ".$o['info']['FontDescriptor']." 0 R\n";
}
$res.=">>\nendobj";
return $res;
break;
}
}
/**
* a font descriptor, needed for including additional fonts
*/
function o_fontDescriptor($id,$action,$options=''){
if ($action!='new'){
$o =& $this->objects[$id];
}
switch ($action){
case 'new':
$this->objects[$id]=array('t'=>'fontDescriptor','info'=>$options);
break;
case 'out':
$res="\n".$id." 0 obj\n<< /Type /FontDescriptor\n";
foreach ($o['info'] as $label => $value){
switch ($label){
case 'Ascent':
case 'CapHeight':
case 'Descent':
case 'Flags':
case 'ItalicAngle':
case 'StemV':
case 'AvgWidth':
case 'Leading':
case 'MaxWidth':
case 'MissingWidth':
case 'StemH':
case 'XHeight':
case 'CharSet':
if (strlen($value)){
$res.='/'.$label.' '.$value."\n";
}
break;
case 'FontFile':
case 'FontFile2':
case 'FontFile3':
$res.='/'.$label.' '.$value." 0 R\n";
break;
case 'FontBBox':
$res.='/'.$label.' ['.$value[0].' '.$value[1].' '.$value[2].' '.$value[3]."]\n";
break;
case 'FontName':
$res.='/'.$label.' /'.$value."\n";
break;
}
}
$res.=">>\nendobj";
return $res;
break;
}
}
/**
* the font encoding
*/
function o_fontEncoding($id,$action,$options=''){
if ($action!='new'){
$o =& $this->objects[$id];
}
switch ($action){
case 'new':
// the options array should contain 'differences' and maybe 'encoding'
$this->objects[$id]=array('t'=>'fontEncoding','info'=>$options);
break;
case 'out':
$res="\n".$id." 0 obj\n<< /Type /Encoding\n";
if (!isset($o['info']['encoding'])){
$o['info']['encoding']='WinAnsiEncoding';
}
if ($o['info']['encoding']!='none'){
$res.="/BaseEncoding /".$o['info']['encoding']."\n";
}
$res.="/Differences \n[";
$onum=-100;
foreach($o['info']['differences'] as $num=>$label){
if ($num!=$onum+1){
// we cannot make use of consecutive numbering
$res.= "\n".$num." /".$label;
} else {
$res.= " /".$label;
}
$onum=$num;
}
$res.="\n]\n>>\nendobj";
return $res;
break;
}
}
/**
* the document procset, solves some problems with printing to old PS printers
*/
function o_procset($id,$action,$options=''){
if ($action!='new'){
$o =& $this->objects[$id];
}
switch ($action){
case 'new':
$this->objects[$id]=array('t'=>'procset','info'=>array('PDF'=>1,'Text'=>1));
$this->o_pages($this->currentNode,'procset',$id);
$this->procsetObjectId=$id;
break;
case 'add':
// this is to add new items to the procset list, despite the fact that this is considered
// obselete, the items are required for printing to some postscript printers
switch ($options) {
case 'ImageB':
case 'ImageC':
case 'ImageI':
$o['info'][$options]=1;
break;
}
break;
case 'out':
$res="\n".$id." 0 obj\n[";
foreach ($o['info'] as $label=>$val){
$res.='/'.$label.' ';
}
$res.="]\nendobj";
return $res;
break;
}
}
/**
* define the document information
*/
function o_info($id,$action,$options=''){
if ($action!='new'){
$o =& $this->objects[$id];
}
switch ($action){
case 'new':
$this->infoObject=$id;
$date='D:'.date('Ymd');
$this->objects[$id]=array('t'=>'info','info'=>array('Creator'=>'R and OS php pdf writer, http://www.ros.co.nz','CreationDate'=>$date));
break;
case 'Title':
case 'Author':
case 'Subject':
case 'Keywords':
case 'Creator':
case 'Producer':
case 'CreationDate':
case 'ModDate':
case 'Trapped':
$o['info'][$action]=$options;
break;
case 'out':
if ($this->encrypted){
$this->encryptInit($id);
}
$res="\n".$id." 0 obj\n<<\n";
foreach ($o['info'] as $k=>$v){
$res.='/'.$k.' (';
if ($this->encrypted){
$res.=$this->filterText($this->ARC4($v));
} else {
$res.=$this->filterText($v);
}
$res.=")\n";
}
$res.=">>\nendobj";
return $res;
break;
}
}
/**
* an action object, used to link to URLS initially
*/
function o_action($id,$action,$options=''){
if ($action!='new'){
$o =& $this->objects[$id];
}
switch ($action){
case 'new':
if (is_array($options)){
$this->objects[$id]=array('t'=>'action','info'=>$options,'type'=>$options['type']);
} else {
// then assume a URI action
$this->objects[$id]=array('t'=>'action','info'=>$options,'type'=>'URI');
}
break;
case 'out':
if ($this->encrypted){
$this->encryptInit($id);
}
$res="\n".$id." 0 obj\n<< /Type /Action";
switch($o['type']){
case 'ilink':
// there will be an 'label' setting, this is the name of the destination
$res.="\n/S /GoTo\n/D ".$this->destinations[(string)$o['info']['label']]." 0 R";
break;
case 'URI':
$res.="\n/S /URI\n/URI (";
if ($this->encrypted){
$res.=$this->filterText($this->ARC4($o['info']));
} else {
$res.=$this->filterText($o['info']);
}
$res.=")";
break;
}
$res.="\n>>\nendobj";
return $res;
break;
}
}
/**
* an annotation object, this will add an annotation to the current page.
* initially will support just link annotations
*/
function o_annotation($id,$action,$options=''){
if ($action!='new'){
$o =& $this->objects[$id];
}
switch ($action){
case 'new':
// add the annotation to the current page
$pageId = $this->currentPage;
$this->o_page($pageId,'annot',$id);
// and add the action object which is going to be required
switch($options['type']){
case 'link':
$this->objects[$id]=array('t'=>'annotation','info'=>$options);
$this->numObj++;
$this->o_action($this->numObj,'new',$options['url']);
$this->objects[$id]['info']['actionId']=$this->numObj;
break;
case 'ilink':
// this is to a named internal link
$label = $options['label'];
$this->objects[$id]=array('t'=>'annotation','info'=>$options);
$this->numObj++;
$this->o_action($this->numObj,'new',array('type'=>'ilink','label'=>$label));
$this->objects[$id]['info']['actionId']=$this->numObj;
break;
}
break;
case 'out':
$res="\n".$id." 0 obj\n<< /Type /Annot";
switch($o['info']['type']){
case 'link':
case 'ilink':
$res.= "\n/Subtype /Link";
break;
}
$res.="\n/A ".$o['info']['actionId']." 0 R";
$res.="\n/Border [0 0 0]";
$res.="\n/H /I";
$res.="\n/Rect [ ";
foreach($o['info']['rect'] as $v){
$res.= sprintf("%.4f ",$v);
}
$res.="]";
$res.="\n>>\nendobj";
return $res;
break;
}
}
/**
* a page object, it also creates a contents object to hold its contents
*/
function o_page($id,$action,$options=''){
if ($action!='new'){
$o =& $this->objects[$id];
}
switch ($action){
case 'new':
$this->numPages++;
$this->objects[$id]=array('t'=>'page','info'=>array('parent'=>$this->currentNode,'pageNum'=>$this->numPages));
if (is_array($options)){
// then this must be a page insertion, array shoudl contain 'rid','pos'=[before|after]
$options['id']=$id;
$this->o_pages($this->currentNode,'page',$options);
} else {
$this->o_pages($this->currentNode,'page',$id);
}
$this->currentPage=$id;
//make a contents object to go with this page
$this->numObj++;
$this->o_contents($this->numObj,'new',$id);
$this->currentContents=$this->numObj;
$this->objects[$id]['info']['contents']=array();
$this->objects[$id]['info']['contents'][]=$this->numObj;
$match = ($this->numPages%2 ? 'odd' : 'even');
foreach($this->addLooseObjects as $oId=>$target){
if ($target=='all' || $match==$target){
$this->objects[$id]['info']['contents'][]=$oId;
}
}
break;
case 'content':
$o['info']['contents'][]=$options;
break;
case 'annot':
// add an annotation to this page
if (!isset($o['info']['annot'])){
$o['info']['annot']=array();
}
// $options should contain the id of the annotation dictionary
$o['info']['annot'][]=$options;
break;
case 'out':
$res="\n".$id." 0 obj\n<< /Type /Page";
$res.="\n/Parent ".$o['info']['parent']." 0 R";
if (isset($o['info']['annot'])){
$res.="\n/Annots [";
foreach($o['info']['annot'] as $aId){
$res.=" ".$aId." 0 R";
}
$res.=" ]";
}
$count = count($o['info']['contents']);
if ($count==1){
$res.="\n/Contents ".$o['info']['contents'][0]." 0 R";
} else if ($count>1){
$res.="\n/Contents [\n";
foreach ($o['info']['contents'] as $cId){
$res.=$cId." 0 R\n";
}
$res.="]";
}
$res.="\n>>\nendobj";
return $res;
break;
}
}
/**
* the contents objects hold all of the content which appears on pages
*/
function o_contents($id,$action,$options=''){
if ($action!='new'){
$o =& $this->objects[$id];
}
switch ($action){
case 'new':
$this->objects[$id]=array('t'=>'contents','c'=>'','info'=>array());
if (strlen($options) && intval($options)){
// then this contents is the primary for a page
$this->objects[$id]['onPage']=$options;
} else if ($options=='raw'){
// then this page contains some other type of system object
$this->objects[$id]['raw']=1;
}
break;
case 'add':
// add more options to the decleration
foreach ($options as $k=>$v){
$o['info'][$k]=$v;
}
case 'out':
$tmp=$o['c'];
$res= "\n".$id." 0 obj\n";
if (isset($this->objects[$id]['raw'])){
$res.=$tmp;
} else {
$res.= "<<";
if (function_exists('gzcompress') && $this->options['compression']){
// then implement ZLIB based compression on this content stream
$res.=" /Filter /FlateDecode";
$tmp = gzcompress($tmp);
}
if ($this->encrypted){
$this->encryptInit($id);
$tmp = $this->ARC4($tmp);
}
foreach($o['info'] as $k=>$v){
$res .= "\n/".$k.' '.$v;
}
$res.="\n/Length ".strlen($tmp)." >>\nstream\n".$tmp."\nendstream";
}
$res.="\nendobj\n";
return $res;
break;
}
}
/**
* an image object, will be an XObject in the document, includes description and data
*/
function o_image($id,$action,$options=''){
if ($action!='new'){
$o =& $this->objects[$id];
}
switch($action){
case 'new':
// make the new object
$this->objects[$id]=array('t'=>'image','data'=>$options['data'],'info'=>array());
$this->objects[$id]['info']['Type']='/XObject';
$this->objects[$id]['info']['Subtype']='/Image';
$this->objects[$id]['info']['Width']=$options['iw'];
$this->objects[$id]['info']['Height']=$options['ih'];
if (!isset($options['type']) || $options['type']=='jpg'){
if (!isset($options['channels'])){
$options['channels']=3;
}
switch($options['channels']){
case 1:
$this->objects[$id]['info']['ColorSpace']='/DeviceGray';
break;
default:
$this->objects[$id]['info']['ColorSpace']='/DeviceRGB';
break;
}
$this->objects[$id]['info']['Filter']='/DCTDecode';
$this->objects[$id]['info']['BitsPerComponent']=8;
} else if ($options['type']=='png'){
$this->objects[$id]['info']['Filter']='/FlateDecode';
$this->objects[$id]['info']['DecodeParms']='<< /Predictor 15 /Colors '.$options['ncolor'].' /Columns '.$options['iw'].' /BitsPerComponent '.$options['bitsPerComponent'].'>>';
if (strlen($options['pdata'])){
$tmp = ' [ /Indexed /DeviceRGB '.(strlen($options['pdata'])/3-1).' ';
$this->numObj++;
$this->o_contents($this->numObj,'new');
$this->objects[$this->numObj]['c']=$options['pdata'];
$tmp.=$this->numObj.' 0 R';
$tmp .=' ]';
$this->objects[$id]['info']['ColorSpace'] = $tmp;
if (isset($options['transparency'])){
switch($options['transparency']['type']){
case 'indexed':
$tmp=' [ '.$options['transparency']['data'].' '.$options['transparency']['data'].'] ';
$this->objects[$id]['info']['Mask'] = $tmp;
break;
}
}
} else {
$this->objects[$id]['info']['ColorSpace']='/'.$options['color'];
}
$this->objects[$id]['info']['BitsPerComponent']=$options['bitsPerComponent'];
}
// assign it a place in the named resource dictionary as an external object, according to
// the label passed in with it.
$this->o_pages($this->currentNode,'xObject',array('label'=>$options['label'],'objNum'=>$id));
// also make sure that we have the right procset object for it.
$this->o_procset($this->procsetObjectId,'add','ImageC');
break;
case 'out':
$tmp=$o['data'];
$res= "\n".$id." 0 obj\n<<";
foreach($o['info'] as $k=>$v){
$res.="\n/".$k.' '.$v;