- Correccion de bugs

[mecon/meconlib.git] / lib / MECON / PDF / external / phppdflib.class.php

diff --git a/lib/MECON/PDF/external/phppdflib.class.php b/lib/MECON/PDF/external/phppdflib.class.php
index 3b4f360eb22ece3924b95cb503a8a21b187ff632..f821c102328268e56298fb5b24088b586adf7ffd 100755 (executable)
--- a/lib/MECON/PDF/external/phppdflib.class.php
+++ b/lib/MECON/PDF/external/phppdflib.class.php
@@ -18,7 +18,7 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-   $Id: phppdflib.class.php,v 2.5 2003/07/05 21:33:07 wmoran Exp $
+   $Id: phppdflib.class.php,v 2.6 2003/08/29 21:15:21 wmoran Exp $
 */
 
 class pdffile
@@ -655,11 +655,103 @@ class pdffile
     function png_embed($data)
     {
         // Sanity, make sure this is a png
-        if (substr($data, 0, 8) != "\137PNG\x0d\x0a\x1a\x0d") {
-            $this->_push_std_error(6011);
+        if (substr($data, 0, 8) != "\x89PNG\x0d\x0a\x1a\x0a") {
+            $this->_push_error(6011, 'brand not valid');
             return false;
         }
-        
+        $data = substr($data, 12);
+        if (substr($data, 0, 4) != 'IHDR') {
+               $this->_push_error(6011, 'IHDR chunk missing');
+            return false;
+        }
+        $data = substr($data, 4);
+        $width = $this->_int_val(substr($data, 0, 4));
+        $height = $this->_int_val(substr($data, 4, 4));
+        $data = substr($data, 8);
+        $bpc = ord(substr($data, 0, 1));
+        $ct  = ord(substr($data, 1, 1));
+        if ($bpc > 8) {
+            $this->_push_error(6014, '16 bit PNG unsupported');
+            return false;
+        }
+        switch ($ct) {
+        case 0 : $cspace = '/DeviceGray'; break;
+        case 2 : $cspace = '/DeviceRGB'; break;
+        case 3 : $cspace = '/Indexed'; break;
+        default:
+            $this->_push_error(6015, 'PNG with alpha not supported');
+            return false;
+        }
+        if (ord(substr($data, 2, 1)) != 0) {
+            $this->_push_error(6016, 'Unknown compression type');
+            return false;
+        }
+        if (ord(substr($data, 3, 1)) != 0) {
+            $this->_push_error(6017, 'Unknown PNG filter method');
+            return false;
+        }
+        if (ord(substr($data, 4, 1)) != 0) {
+            $this->_push_error(6018, 'PNG interlacing not supported');
+            return false;
+        }
+        $params['Predictor'] = '15';
+        $params['Colors'] = $ct == 2 ? 3 : 1;
+        $params['BitsPerComponent'] = $bpc;
+        $params['Columns'] = $width;
+        $additional['DecodeParms'] = $this->_makedictionary($params);
+        $data = substr($data, 9);
+        $pal = '';
+        $trns = '';
+        $rawdata = '';
+        do {
+            $n = $this->_int_val(substr($data, 0, 4));
+            $type = substr($data, 4, 4);
+            $data = substr($data, 8);
+            switch ($type) {
+            case 'PLTE' :
+                $pal = substr($data, 0, $n);
+                $data = substr($data, $n + 4);
+                break;
+                
+            case 'tRNS' :
+                $t = substr($data, 0, $n);
+                if ($ct == 0)
+                    $trns = array(ord(substr($t, 1, 1)));
+                elseif ($ct == 2)
+                    $trns = array(ord(substr($t, 1, 1)),
+                                  ord(substr($t, 3, 1)),
+                                  ord(substr($t, 5, 1)));
+                else {
+                    $pos = strpos($t, chr(0));
+                    if (is_int($pos))
+                        $trns = array($pos);
+                }
+                $data = substr($data, $n + 4);
+                break;
+                
+            case 'IDAT' :
+                $rawdata .= substr($data, 0, $n);
+                $data = substr($data, $n + 4);
+                break;
+                
+            case 'IEND' :
+                break 2;
+            
+            default :
+                $data = substr($data, $n + 4);
+            }
+        } while ($n);
+        if ($cspace == '/Indexed') {
+            $this->_push_error(6011, 'Indexed without palette');
+            return false;
+        }
+        return $this->image_raw_embed($rawdata,
+                                      $cspace,
+                                      $bpc,
+                                      $height,
+                                      $width,
+                                      '/FlateDecode',
+                                      $additional);
     }
 
     function jfif_embed($data)
@@ -747,16 +839,23 @@ class pdffile
                                       "/DCTDecode");
     }
 
-    function image_raw_embed($data, $cspace, $bpc, $height, $width, $filter = "")
+    function image_raw_embed($data,
+                             $cspace,
+                             $bpc,
+                             $height,
+                             $width,
+                             $filter = "",
+                             $addtl = array())
     {
         $o = $this->_addnewoid();
-        $t["data"] = $data;
-        $t["colorspace"] = $cspace;
-        $t["bpc"] = $bpc;
-        $t["type"] = "image";
-        $t["height"] = $height;
-        $t["width"] = $width;
-        $t["filter"] = $filter;
+        $t['additional'] = $addtl;
+        $t['data'] = $data;
+        $t['colorspace'] = $cspace;
+        $t['bpc'] = $bpc;
+        $t['type'] = "image";
+        $t['height'] = $height;
+        $t['width'] = $width;
+        $t['filter'] = $filter;
         $this->objects[$o] = $t;
         return $o;
     }
@@ -1157,6 +1256,8 @@ class pdffile
 
     function _make_raw_image($liboid)
     {
+        if (is_array($this->objects[$liboid]['additional']))
+            $s = $this->objects[$liboid]['additional'];
         $s["Type"] = "/XObject";
         $s["Subtype"] = "/Image";
         $s["Width"] = $this->objects[$liboid]["width"];
@@ -1193,7 +1294,7 @@ class pdffile
         $a = deg2rad($angle);
         $cos = cos($a);
         $sin = sin($a);
-        $r = sprintf("%1\$01.6f %2\$01.6f %3\$01.6f %1\$01.6f 0 0", $cos, $sin, -$sin);
+        $r = sprintf("%1\$1.6f %2\$1.6f %3\$1.6f %1\$1.6f 0 0", $cos, $sin, -$sin);
         return $r;
     }
 
@@ -1454,16 +1555,19 @@ class pdffile
          * for php, thus we need to make sure it's
          * available before using it.
          */
-        if ( function_exists('gzcompress') && $this->builddata["compress"] ) {
-            // For now, we don't compress if already using a filter
-            if ( !isset($sarray["Filter"]) || strlen($sarray["Filter"]) == 0 ) {
-                $sarray["Filter"] = "/FlateDecode";
+        $go = true;
+        if (function_exists('gzcompress') && $this->builddata['compress']) {
+            if ( !isset($sarray['Filter']) || strlen($sarray['Filter']) == 0 ) {
+                $sarray['Filter'] = '/FlateDecode';
             } else {
-                $sarray['Filter'] = "[/FlateDecode " . $sarray['Filter'] . "]";
+                if ($sarray['Filter'] != '/FlateDecode')
+                    $sarray['Filter'] = '[/FlateDecode ' . $sarray['Filter'] . ']';
+                else
+                    $go = false;
             }
-            $data = gzcompress($data, $this->builddata["compress"]);
+            if ($go) $data = gzcompress($data, $this->builddata['compress']);
         }
-        $sarray["Length"] = strlen($data);
+        $sarray['Length'] = strlen($data);
         $os = $this->_makedictionary($sarray);
         $os .= "stream\x0a" . $data . "\x0aendstream";
         return $os;