✏️ Editing: ttfontsuni_analysis.php

<?php

require_once(_MPDF_PATH . 'classes/ttfontsuni.php');

class TTFontFile_Analysis EXTENDS TTFontFile {

// Used to get font information from files in directory
    function extractCoreInfo($file, $TTCfontID = 0) {
        $this->filename = $file;
        $this->fh = fopen($file, 'rb');
        if (!$this->fh) {
            return ('ERROR - Can\'t open file ' . $file);
        }
        $this->_pos = 0;
        $this->charWidths = '';
        $this->glyphPos = array();
        $this->charToGlyph = array();
        $this->tables = array();
        $this->otables = array();
        $this->ascent = 0;
        $this->descent = 0;
        $this->numTTCFonts = 0;
        $this->TTCFonts = array();
        $this->version = $version = $this->read_ulong();
        $this->panose = array(); // mPDF 5.0
        if ($version == 0x4F54544F)
            return("ERROR - NOT ADDED as Postscript outlines are not supported - " . $file);
        if ($version == 0x74746366) {
            if ($TTCfontID > 0) {
                $this->version = $version = $this->read_ulong(); // TTC Header version now
                if (!in_array($version, array(0x00010000, 0x00020000)))
                    return("ERROR - NOT ADDED as Error parsing TrueType Collection: version=" . $version . " - " . $file);
            } else
                return("ERROR - Error parsing TrueType Collection - " . $file);
            $this->numTTCFonts = $this->read_ulong();
            for ($i = 1; $i <= $this->numTTCFonts; $i++) {
                $this->TTCFonts[$i]['offset'] = $this->read_ulong();
            }
            $this->seek($this->TTCFonts[$TTCfontID]['offset']);
            $this->version = $version = $this->read_ulong(); // TTFont version again now
            $this->readTableDirectory(false);
        } else {
            if (!in_array($version, array(0x00010000, 0x74727565)))
                return("ERROR - NOT ADDED as Not a TrueType font: version=" . $version . " - " . $file);
            $this->readTableDirectory(false);
        }

/* Included for testing...
          $cmap_offset = $this->seek_table("cmap");
          $this->skip(2);
          $cmapTableCount = $this->read_ushort();
          $unicode_cmap_offset = 0;
          for ($i=0;$i<$cmapTableCount;$i++) {
          $x[$i]['platformId'] = $this->read_ushort();
          $x[$i]['encodingId'] = $this->read_ushort();
          $x[$i]['offset'] = $this->read_ulong();
          $save_pos = $this->_pos;
          $x[$i]['format'] = $this->get_ushort($cmap_offset + $x[$i]['offset'] );
          $this->seek($save_pos );
          }
          print_r($x); exit;
         */
        ///////////////////////////////////
        // name - Naming table
        ///////////////////////////////////

/* Test purposes - displays table of names 
          $name_offset = $this->seek_table("name");
          $format = $this->read_ushort();
          if ($format != 0 && $format != 1)	// mPDF 5.3.73
          die("Unknown name table format ".$format);
          $numRecords = $this->read_ushort();
          $string_data_offset = $name_offset + $this->read_ushort();
          for ($i=0;$i<$numRecords; $i++) {
          $x[$i]['platformId'] = $this->read_ushort();
          $x[$i]['encodingId'] = $this->read_ushort();
          $x[$i]['languageId'] = $this->read_ushort();
          $x[$i]['nameId'] = $this->read_ushort();
          $x[$i]['length'] = $this->read_ushort();
          $x[$i]['offset'] = $this->read_ushort();

$N = '';
          if ($x[$i]['platformId'] == 1 && $x[$i]['encodingId'] == 0 && $x[$i]['languageId'] == 0) { // Roman
          $opos = $this->_pos;
          $N = $this->get_chunk($string_data_offset + $x[$i]['offset'] , $x[$i]['length'] );
          $this->_pos = $opos;
          $this->seek($opos);
          }
          else { 	// Unicode
          $opos = $this->_pos;
          $this->seek($string_data_offset + $x[$i]['offset'] );
          $length = $x[$i]['length'] ;
          if ($length % 2 != 0)
          $length -= 1;
          //		die("PostScript name is UTF-16BE string of odd length");
          $length /= 2;
          $N = '';
          while ($length > 0) {
          $char = $this->read_ushort();
          $N .= (chr($char));
          $length -= 1;
          }
          $this->_pos = $opos;
          $this->seek($opos);
          }
          $x[$i]['names'][$nameId] = $N;
          }
          print_r($x); exit;
         */

$name_offset = $this->seek_table("name");
        $format = $this->read_ushort();
        if ($format != 0 && $format != 1) // mPDF 5.3.73
            return("ERROR - NOT ADDED as Unknown name table format " . $format . " - " . $file);
        $numRecords = $this->read_ushort();
        $string_data_offset = $name_offset + $this->read_ushort();
        $names = array(1 => '', 2 => '', 3 => '', 4 => '', 6 => '');
        $K = array_keys($names);
        $nameCount = count($names);
        for ($i = 0; $i < $numRecords; $i++) {
            $platformId = $this->read_ushort();
            $encodingId = $this->read_ushort();
            $languageId = $this->read_ushort();
            $nameId = $this->read_ushort();
            $length = $this->read_ushort();
            $offset = $this->read_ushort();
            if (!in_array($nameId, $K))
                continue;
            $N = '';
            if ($platformId == 3 && $encodingId == 1 && $languageId == 0x409) { // Microsoft, Unicode, US English, PS Name
                $opos = $this->_pos;
                $this->seek($string_data_offset + $offset);
                if ($length % 2 != 0)
                    $length += 1;
                $length /= 2;
                $N = '';
                while ($length > 0) {
                    $char = $this->read_ushort();
                    $N .= (chr($char));
                    $length -= 1;
                }
                $this->_pos = $opos;
                $this->seek($opos);
            } else if ($platformId == 1 && $encodingId == 0 && $languageId == 0) { // Macintosh, Roman, English, PS Name
                $opos = $this->_pos;
                $N = $this->get_chunk($string_data_offset + $offset, $length);
                $this->_pos = $opos;
                $this->seek($opos);
            }
            if ($N && $names[$nameId] == '') {
                $names[$nameId] = $N;
                $nameCount -= 1;
                if ($nameCount == 0)
                    break;
            }
        }
        if ($names[6])
            $psName = preg_replace('/ /', '-', $names[6]);
        else if ($names[4])
            $psName = preg_replace('/ /', '-', $names[4]);
        else if ($names[1])
            $psName = preg_replace('/ /', '-', $names[1]);
        else
            $psName = '';
        if (!$names[1] && !$psName)
            return("ERROR - NOT ADDED as Could not find valid font name - " . $file);
        $this->name = $psName;
        if ($names[1]) {
            $this->familyName = $names[1];
        } else {
            $this->familyName = $psName;
        }
        if ($names[2]) {
            $this->styleName = $names[2];
        } else {
            $this->styleName = 'Regular';
        }

///////////////////////////////////
        // head - Font header table
        ///////////////////////////////////
        $this->seek_table("head");
        $ver_maj = $this->read_ushort();
        $ver_min = $this->read_ushort();
        if ($ver_maj != 1)
            return('ERROR - NOT ADDED as Unknown head table version ' . $ver_maj . '.' . $ver_min . " - " . $file);
        $this->fontRevision = $this->read_ushort() . $this->read_ushort();
        $this->skip(4);
        $magic = $this->read_ulong();
        if ($magic != 0x5F0F3CF5)
            return('ERROR - NOT ADDED as Invalid head table magic ' . $magic . " - " . $file);
        $this->skip(2);
        $this->unitsPerEm = $unitsPerEm = $this->read_ushort();
        $scale = 1000 / $unitsPerEm;
        $this->skip(24);
        $macStyle = $this->read_short();
        $this->skip(4);
        $indexLocFormat = $this->read_short();

///////////////////////////////////
        // OS/2 - OS/2 and Windows metrics table
        ///////////////////////////////////
        $sFamily = '';
        $panose = '';
        $fsSelection = '';
        if (isset($this->tables["OS/2"])) {
            $this->seek_table("OS/2");
            $this->skip(30);
            $sF = $this->read_short();
            $sFamily = ($sF >> 8);
            $this->_pos += 10;  //PANOSE = 10 byte length
            $panose = fread($this->fh, 10);
            $this->panose = array();
            for ($p = 0; $p < strlen($panose); $p++) {
                $this->panose[] = ord($panose[$p]);
            }
            $this->skip(20);
            $fsSelection = $this->read_short();
        }

///////////////////////////////////
        // post - PostScript table
        ///////////////////////////////////
        $this->seek_table("post");
        $this->skip(4);
        $this->italicAngle = $this->read_short() + $this->read_ushort() / 65536.0;
        $this->skip(4);
        $isFixedPitch = $this->read_ulong();

///////////////////////////////////
        // cmap - Character to glyph index mapping table
        ///////////////////////////////////
        $cmap_offset = $this->seek_table("cmap");
        $this->skip(2);
        $cmapTableCount = $this->read_ushort();
        $unicode_cmap_offset = 0;
        for ($i = 0; $i < $cmapTableCount; $i++) {
            $platformID = $this->read_ushort();
            $encodingID = $this->read_ushort();
            $offset = $this->read_ulong();
            $save_pos = $this->_pos;
            if (($platformID == 3 && $encodingID == 1) || $platformID == 0) { // Microsoft, Unicode
                $format = $this->get_ushort($cmap_offset + $offset);
                if ($format == 4) {
                    if (!$unicode_cmap_offset)
                        $unicode_cmap_offset = $cmap_offset + $offset;
                }
            }
            else if ((($platformID == 3 && $encodingID == 10) || $platformID == 0)) { // Microsoft, Unicode Format 12 table HKCS
                $format = $this->get_ushort($cmap_offset + $offset);
                if ($format == 12) {
                    $unicode_cmap_offset = $cmap_offset + $offset;
                    break;
                }
            }
            $this->seek($save_pos);
        }

if (!$unicode_cmap_offset)
            return('ERROR - Font (' . $this->filename . ') NOT ADDED as it is not Unicode encoded, and cannot be used by mPDF');

$rtl = false;
        $indic = false;
        $cjk = false;
        $sip = false;
        $smp = false;
        $pua = false;
        $puaag = false;
        $glyphToChar = array();
        $unAGlyphs = '';
        // Format 12 CMAP does characters above Unicode BMP i.e. some HKCS characters U+20000 and above
        if ($format == 12) {
            $this->seek($unicode_cmap_offset + 4);
            $length = $this->read_ulong();
            $limit = $unicode_cmap_offset + $length;
            $this->skip(4);
            $nGroups = $this->read_ulong();
            for ($i = 0; $i < $nGroups; $i++) {
                $startCharCode = $this->read_ulong();
                $endCharCode = $this->read_ulong();
                $startGlyphCode = $this->read_ulong();
                if (($endCharCode > 0x20000 && $endCharCode < 0x2A6DF) || ($endCharCode > 0x2F800 && $endCharCode < 0x2FA1F)) {
                    $sip = true;
                }
                if ($endCharCode > 0x10000 && $endCharCode < 0x1FFFF) {
                    $smp = true;
                }
                if (($endCharCode > 0x0590 && $endCharCode < 0x077F) || ($endCharCode > 0xFE70 && $endCharCode < 0xFEFF) || ($endCharCode > 0xFB50 && $endCharCode < 0xFDFF)) {
                    $rtl = true;
                }
                if ($endCharCode > 0x0900 && $endCharCode < 0x0DFF) {
                    $indic = true;
                }
                if ($endCharCode > 0xE000 && $endCharCode < 0xF8FF) {
                    $pua = true;
                    if ($endCharCode > 0xF500 && $endCharCode < 0xF7FF) {
                        $puaag = true;
                    }
                }
                if (($endCharCode > 0x2E80 && $endCharCode < 0x4DC0) || ($endCharCode > 0x4E00 && $endCharCode < 0xA4CF) || ($endCharCode > 0xAC00 && $endCharCode < 0xD7AF) || ($endCharCode > 0xF900 && $endCharCode < 0xFAFF) || ($endCharCode > 0xFE30 && $endCharCode < 0xFE4F)) {
                    $cjk = true;
                }

$offset = 0;
                // Get each glyphToChar - only point if going to analyse un-mapped Arabic Glyphs
                if (isset($this->tables['post'])) {
                    for ($unichar = $startCharCode; $unichar <= $endCharCode; $unichar++) {
                        $glyph = $startGlyphCode + $offset;
                        $offset++;
                        $glyphToChar[$glyph][] = $unichar;
                    }
                }
            }
        } else { // Format 4 CMap
            $this->seek($unicode_cmap_offset + 2);
            $length = $this->read_ushort();
            $limit = $unicode_cmap_offset + $length;
            $this->skip(2);

$segCount = $this->read_ushort() / 2;
            $this->skip(6);
            $endCount = array();
            for ($i = 0; $i < $segCount; $i++) {
                $endCount[] = $this->read_ushort();
            }
            $this->skip(2);
            $startCount = array();
            for ($i = 0; $i < $segCount; $i++) {
                $startCount[] = $this->read_ushort();
            }
            $idDelta = array();
            for ($i = 0; $i < $segCount; $i++) {
                $idDelta[] = $this->read_short();
            }
            $idRangeOffset_start = $this->_pos;
            $idRangeOffset = array();
            for ($i = 0; $i < $segCount; $i++) {
                $idRangeOffset[] = $this->read_ushort();
            }

for ($n = 0; $n < $segCount; $n++) {
                if (($endCount[$n] > 0x0590 && $endCount[$n] < 0x077F) || ($endCount[$n] > 0xFE70 && $endCount[$n] < 0xFEFF) || ($endCount[$n] > 0xFB50 && $endCount[$n] < 0xFDFF)) {
                    $rtl = true;
                }
                if ($endCount[$n] > 0x0900 && $endCount[$n] < 0x0DFF) {
                    $indic = true;
                }
                if (($endCount[$n] > 0x2E80 && $endCount[$n] < 0x4DC0) || ($endCount[$n] > 0x4E00 && $endCount[$n] < 0xA4CF) || ($endCount[$n] > 0xAC00 && $endCount[$n] < 0xD7AF) || ($endCount[$n] > 0xF900 && $endCount[$n] < 0xFAFF) || ($endCount[$n] > 0xFE30 && $endCount[$n] < 0xFE4F)) {
                    $cjk = true;
                }
                if ($endCount[$n] > 0xE000 && $endCount[$n] < 0xF8FF) {
                    $pua = true;
                    if ($endCount[$n] > 0xF500 && $endCount[$n] < 0xF7FF) {
                        $puaag = true;
                    }
                }
                // Get each glyphToChar - only point if going to analyse un-mapped Arabic Glyphs
                if (isset($this->tables['post'])) {
                    $endpoint = ($endCount[$n] + 1);
                    for ($unichar = $startCount[$n]; $unichar < $endpoint; $unichar++) {
                        if ($idRangeOffset[$n] == 0)
                            $glyph = ($unichar + $idDelta[$n]) & 0xFFFF;
                        else {
                            $offset = ($unichar - $startCount[$n]) * 2 + $idRangeOffset[$n];
                            $offset = $idRangeOffset_start + 2 * $n + $offset;
                            if ($offset >= $limit)
                                $glyph = 0;
                            else {
                                $glyph = $this->get_ushort($offset);
                                if ($glyph != 0)
                                    $glyph = ($glyph + $idDelta[$n]) & 0xFFFF;
                            }
                        }
                        $glyphToChar[$glyph][] = $unichar;
                    }
                }
            }
        }

$bold = false;
        $italic = false;
        $ftype = '';
        if ($macStyle & (1 << 0)) {
            $bold = true;
        } // bit 0 bold
        else if ($fsSelection & (1 << 5)) {
            $bold = true;
        } // 5 	BOLD 	Characters are emboldened

if ($macStyle & (1 << 1)) {
            $italic = true;
        } // bit 1 italic
        else if ($fsSelection & (1 << 0)) {
            $italic = true;
        } // 0 	ITALIC 	Font contains Italic characters, otherwise they are upright
        else if ($this->italicAngle <> 0) {
            $italic = true;
        }

if ($isFixedPitch) {
            $ftype = 'mono';
        } else if ($sFamily > 0 && $sFamily < 8) {
            $ftype = 'serif';
        } else if ($sFamily == 8) {
            $ftype = 'sans';
        } else if ($sFamily == 10) {
            $ftype = 'cursive';
        }
        // Use PANOSE
        if ($panose) {
            $bFamilyType = ord($panose[0]);
            if ($bFamilyType == 2) {
                $bSerifStyle = ord($panose[1]);
                if (!$ftype) {
                    if ($bSerifStyle > 1 && $bSerifStyle < 11) {
                        $ftype = 'serif';
                    } else if ($bSerifStyle > 10) {
                        $ftype = 'sans';
                    }
                }
                $bProportion = ord($panose[3]);
                if ($bProportion == 9 || $bProportion == 1) {
                    $ftype = 'mono';
                } // ==1 i.e. No Fit needed for OCR-a and -b
            } else if ($bFamilyType == 3) {
                $ftype = 'cursive';
            }
        }

fclose($this->fh);
        return array($this->familyName, $bold, $italic, $ftype, $TTCfontID, $rtl, $indic, $cjk, $sip, $smp, $puaag, $pua, $unAGlyphs);
    }

}

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