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spip_nursit/lib/mpdf/classes/ttfontsuni_analysis.php

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2023-06-01 15:30:12 +00:00
<?php
require_once __DIR__ . '/../MpdfException.php';
require_once __DIR__ . '/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) {
throw new MpdfException('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))) {
throw new MpdfException("ERROR - NOT ADDED as Error parsing TrueType Collection: version=" . $version . " - " . $file);
}
} else {
throw new MpdfException("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))) {
throw new MpdfException("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
throw new MpdfException("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)
throw new MpdfException("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)
throw new MpdfException('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)
throw new MpdfException('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)
throw new MpdfException('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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