pdf-print / mpdf / mpdfi / fpdi_pdf_parser.php

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1	<?php
2	//
3	// FPDI - Version 1.2
4	//
5	// Copyright 2004-2007 Setasign - Jan Slabon
6	//
7	// Licensed under the Apache License, Version 2.0 (the "License");
8	// you may not use this file except in compliance with the License.
9	// You may obtain a copy of the License at
10	//
11	// http://www.apache.org/licenses/LICENSE-2.0
12	//
13	// Unless required by applicable law or agreed to in writing, software
14	// distributed under the License is distributed on an "AS IS" BASIS,
15	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16	// See the License for the specific language governing permissions and
17	// limitations under the License.
18	//
19
20
21	class fpdi_pdf_parser extends pdf_parser {
22
23	/**
24	* Pages
25	* Index beginns at 0
26	*
27	* @var array
28	*/
29	var $pages;
30
31	/**
32	* Page count
33	* @var integer
34	*/
35	var $page_count;
36
37	/**
38	* actual page number
39	* @var integer
40	*/
41	var $pageno;
42
43
44	/**
45	* FPDI Reference
46	* @var object
47	*/
48	var $fpdi;
49
50	/**
51	* Available BoxTypes
52	*
53	* @var array
54	*/
55	var $availableBoxes = array("/MediaBox","/CropBox","/BleedBox","/TrimBox","/ArtBox");
56
57	/**
58	* Constructor
59	*
60	* @param string $filename Source-Filename
61	* @param object $fpdi Object of type fpdi
62	*/
63	function fpdi_pdf_parser($filename,&$fpdi) {
64	$this->fpdi =& $fpdi;
65	$this->filename = $filename;
66
67	parent::pdf_parser($filename);
68	if ($this->success == false) { return false; }
69
70	// resolve Pages-Dictonary
71	$pages = $this->pdf_resolve_object($this->c, $this->root[1][1]['/Pages']);
72	if ($this->success == false) { return false; }
73
74	// Read pages
75	$this->read_pages($this->c, $pages, $this->pages);
76	if ($this->success == false) { return false; }
77
78	// count pages;
79	$this->page_count = count($this->pages);
80	}
81
82
83	/**
84	* Get pagecount from sourcefile
85	*
86	* @return int
87	*/
88	function getPageCount() {
89	return $this->page_count;
90	}
91
92
93	/**
94	* Set pageno
95	*
96	* @param int $pageno Pagenumber to use
97	*/
98	function setPageno($pageno) {
99	$pageno = ((int) $pageno) - 1;
100
101	if ($pageno < 0 \|\| $pageno >= $this->getPageCount()) {
102	$this->fpdi->error("Pagenumber is wrong!");
103	}
104
105	$this->pageno = $pageno;
106	}
107
108	/**
109	* Get page-resources from current page
110	*
111	* @return array
112	*/
113	function getPageResources() {
114	return $this->_getPageResources($this->pages[$this->pageno]);
115	}
116
117	/**
118	* Get page-resources from /Page
119	*
120	* @param array $obj Array of pdf-data
121	*/
122	function _getPageResources ($obj) { // $obj = /Page
123	$obj = $this->pdf_resolve_object($this->c, $obj);
124
125	// If the current object has a resources
126	// dictionary associated with it, we use
127	// it. Otherwise, we move back to its
128	// parent object.
129	if (isset ($obj[1][1]['/Resources'])) {
130	$res = $this->pdf_resolve_object($this->c, $obj[1][1]['/Resources']);
131	if ($res[0] == PDF_TYPE_OBJECT)
132	return $res[1];
133	return $res;
134	} else {
135	if (!isset ($obj[1][1]['/Parent'])) {
136	return false;
137	} else {
138	$res = $this->_getPageResources($obj[1][1]['/Parent']);
139	if ($res[0] == PDF_TYPE_OBJECT)
140	return $res[1];
141	return $res;
142	}
143	}
144	}
145
146
147	/**
148	* Get content of current page
149	*
150	* If more /Contents is an array, the streams are concated
151	*
152	* @return string
153	*/
154	function getContent() {
155	$buffer = "";
156
157	if (isset($this->pages[$this->pageno][1][1]['/Contents'])) {
158	$contents = $this->_getPageContent($this->pages[$this->pageno][1][1]['/Contents']);
159	foreach($contents AS $tmp_content) {
160	$buffer .= $this->_rebuildContentStream($tmp_content).' ';
161	}
162	}
163
164	return $buffer;
165	}
166
167
168	/**
169	* Resolve all content-objects
170	*
171	* @param array $content_ref
172	* @return array
173	*/
174	function _getPageContent($content_ref) {
175	$contents = array();
176
177	if ($content_ref[0] == PDF_TYPE_OBJREF) {
178	$content = $this->pdf_resolve_object($this->c, $content_ref);
179	if ($content[1][0] == PDF_TYPE_ARRAY) {
180	$contents = $this->_getPageContent($content[1]);
181	} else {
182	$contents[] = $content;
183	}
184	} else if ($content_ref[0] == PDF_TYPE_ARRAY) {
185	foreach ($content_ref[1] AS $tmp_content_ref) {
186	$contents = array_merge($contents,$this->_getPageContent($tmp_content_ref));
187	}
188	}
189
190	return $contents;
191	}
192
193
194	/**
195	* Rebuild content-streams
196	*
197	* @param array $obj
198	* @return string
199	*/
200	function _rebuildContentStream($obj) {
201	$filters = array();
202
203	if (isset($obj[1][1]['/Filter'])) {
204	$_filter = $obj[1][1]['/Filter'];
205
206	if ($_filter[0] == PDF_TYPE_TOKEN) {
207	$filters[] = $_filter;
208	} else if ($_filter[0] == PDF_TYPE_ARRAY) {
209	$filters = $_filter[1];
210	}
211	}
212
213	$stream = $obj[2][1];
214
215	foreach ($filters AS $_filter) {
216	switch ($_filter[1]) {
217	case "/FlateDecode":
218	if (function_exists('gzuncompress')) {
219	$stream = (strlen($stream) > 0) ? @gzuncompress($stream) : '';
220	} else {
221	$this->fpdi->error(sprintf("To handle %s filter, please compile php with zlib support.",$_filter[1]));
222	}
223	if ($stream === false) {
224	$this->fpdi->error("Error while decompressing stream.");
225	}
226	break;
227	// mPDF 4.2.003
228	case '/LZWDecode':
229	include_once(_MPDF_PATH.'mpdfi/filters/FilterLZW.php');
230	// mPDF 5.0 Removed pass by reference =&
231	$decoder = new FilterLZW();
232	$stream = $decoder->decode($stream);
233	break;
234	case '/ASCII85Decode':
235	include_once(_MPDF_PATH.'mpdfi/filters/FilterASCII85.php');
236	// mPDF 5.0 Removed pass by reference =&
237	$decoder = new FilterASCII85();
238	$stream = $decoder->decode($stream);
239	break;
240	case null:
241	$stream = $stream;
242	break;
243	default:
244	$this->fpdi->error(sprintf("Unsupported Filter: %s",$_filter[1]));
245	}
246	}
247
248	return $stream;
249	}
250
251
252	/**
253	* Get a Box from a page
254	* Arrayformat is same as used by fpdf_tpl
255	*
256	* @param array $page a /Page
257	* @param string $box_index Type of Box @see $availableBoxes
258	* @return array
259	*/
260	function getPageBox($page, $box_index) {
261	$page = $this->pdf_resolve_object($this->c,$page);
262	$box = null;
263	if (isset($page[1][1][$box_index]))
264	$box =& $page[1][1][$box_index];
265
266	if (!is_null($box) && $box[0] == PDF_TYPE_OBJREF) {
267	$tmp_box = $this->pdf_resolve_object($this->c,$box);
268	$box = $tmp_box[1];
269	}
270
271	if (!is_null($box) && $box[0] == PDF_TYPE_ARRAY) {
272	$b =& $box[1];
273	return array("x" => $b[0][1]/_MPDFK,
274	"y" => $b[1][1]/_MPDFK,
275	"w" => abs($b[0][1]-$b[2][1])/_MPDFK,
276	"h" => abs($b[1][1]-$b[3][1])/_MPDFK); // mPDF 5.3.90
277	} else if (!isset ($page[1][1]['/Parent'])) {
278	return false;
279	} else {
280	return $this->getPageBox($this->pdf_resolve_object($this->c, $page[1][1]['/Parent']), $box_index);
281	}
282	}
283
284	function getPageBoxes($pageno) {
285	return $this->_getPageBoxes($this->pages[$pageno-1]);
286	}
287
288	/**
289	* Get all Boxes from /Page
290	*
291	* @param array a /Page
292	* @return array
293	*/
294	function _getPageBoxes($page) {
295	$boxes = array();
296
297	foreach($this->availableBoxes AS $box) {
298	if ($_box = $this->getPageBox($page,$box)) {
299	$boxes[$box] = $_box;
300	}
301	}
302
303	return $boxes;
304	}
305
306	function getPageRotation($pageno) {
307	return $this->_getPageRotation($this->pages[$pageno-1]);
308	}
309
310	function _getPageRotation ($obj) { // $obj = /Page
311	$obj = $this->pdf_resolve_object($this->c, $obj);
312	if (isset ($obj[1][1]['/Rotate'])) {
313	$res = $this->pdf_resolve_object($this->c, $obj[1][1]['/Rotate']);
314	if ($res[0] == PDF_TYPE_OBJECT)
315	return $res[1];
316	return $res;
317	} else {
318	if (!isset ($obj[1][1]['/Parent'])) {
319	return false;
320	} else {
321	$res = $this->_getPageRotation($obj[1][1]['/Parent']);
322	if ($res[0] == PDF_TYPE_OBJECT)
323	return $res[1];
324	return $res;
325	}
326	}
327	}
328
329	/**
330	* Read all /Page(es)
331	*
332	* @param object pdf_context
333	* @param array /Pages
334	* @param array the result-array
335	*/
336	function read_pages (&$c, &$pages, &$result) {
337	// Get the kids dictionary
338	$kids = $this->pdf_resolve_object ($c, $pages[1][1]['/Kids']);
339
340	if (!is_array($kids)) {
341	// mPDF 4.0
342	$this->success = false;
343	$this->errormsg = sprintf("Cannot find /Kids in current /Page-Dictionary");
344	return false;
345	}
346	foreach ($kids[1] as $v) {
347	$pg = $this->pdf_resolve_object ($c, $v);
348	if ($pg[1][1]['/Type'][1] === '/Pages') {
349	// If one of the kids is an embedded
350	// /Pages array, resolve it as well.
351	$this->read_pages ($c, $pg, $result);
352	} else {
353	$result[] = $pg;
354	}
355	}
356	}
357
358
359
360
361	}
362
363	?>