/**
* Parse PNG stream
*
* @param $f
* @param $file
* @return array
* @throws PdfException
*/
protected function _parsePngStream($f, $file)
{
if ($this->_readStream($f, 8) != chr(137) . 'PNG' . chr(13) . chr(10) . chr(26) . chr(10)) {
throw new PdfException('Not a PNG file: ' . $file);
}
$this->_readStream($f, 4);
if ($this->_readStream($f, 4) != 'IHDR') {
throw new PdfException('Incorrect PNG file: ' . $file);
}
$w = $this->_readInt($f);
$h = $this->_readInt($f);
$bpc = ord($this->_readStream($f, 1));
if ($bpc > 8) {
throw new PdfException('16-bit depth not supported: ' . $file);
}
$ct = ord($this->_readStream($f, 1));
if ($ct == 0 || $ct == 4) {
$colspace = 'DeviceGray';
} elseif ($ct == 2 || $ct == 6) {
$colspace = 'DeviceRGB';
} elseif ($ct == 3) {
$colspace = 'Indexed';
} else {
throw new PdfException('Unknown color type: ' . $file);
}
if (ord($this->_readStream($f, 1)) != 0) {
throw new PdfException('Unknown compression method: ' . $file);
}
if (ord($this->_readStream($f, 1)) != 0) {
throw new PdfException('Unknown filter method: ' . $file);
}
if (ord($this->_readStream($f, 1)) != 0) {
throw new PdfException('Interlacing not supported: ' . $file);
}
$this->_readStream($f, 4);
$dp = '/Predictor 15 /Colors ' . ($colspace == 'DeviceRGB' ? 3 : 1) . ' /BitsPerComponent ' . $bpc . ' /Columns ' . $w;
$pal = '';
$trns = '';
$data = '';
do {
$n = $this->_readInt($f);
$type = $this->_readStream($f, 4);
if ($type == 'PLTE') {
$pal = $this->_readStream($f, $n);
$this->_readStream($f, 4);
} elseif ($type == 'tRNS') {
$t = $this->_readStream($f, $n);
if ($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 ($pos !== false) {
$trns = array($pos);
}
}
$this->_readStream($f, 4);
} elseif ($type == 'IDAT') {
$data .= $this->_readStream($f, $n);
$this->_readStream($f, 4);
} elseif ($type == 'IEND') {
break;
} else {
$this->_readStream($f, $n + 4);
}
} while ($n);
if ($colspace == 'Indexed' && empty($pal)) {
throw new PdfException('Missing palette in ' . $file);
}
$info = array('w' => $w, 'h' => $h, 'cs' => $colspace, 'bpc' => $bpc, 'f' => 'FlateDecode', 'dp' => $dp, 'pal' => $pal, 'trns' => $trns);
if ($ct >= 4) {
if (!function_exists('gzuncompress')) {
throw new PdfException('Zlib not available, can\'t handle alpha channel: ' . $file);
}
$data = gzuncompress($data);
$color = '';
$alpha = '';
if ($ct == 4) {
$len = 2 * $w;
for ($i = 0; $i < $h; $i++) {
$pos = (1 + $len) * $i;
$color .= $data[$pos];
$alpha .= $data[$pos];
$line = substr($data, $pos + 1, $len);
$color .= preg_replace('/(.)./s', '$1', $line);
$alpha .= preg_replace('/.(.)/s', '$1', $line);
}
} else {
$len = 4 * $w;
for ($i = 0; $i < $h; $i++) {
$pos = (1 + $len) * $i;
$color .= $data[$pos];
$alpha .= $data[$pos];
$line = substr($data, $pos + 1, $len);
$color .= preg_replace('/(.{3})./s', '$1', $line);
$alpha .= preg_replace('/.{3}(.)/s', '$1', $line);
}
}
unset($data);
$data = gzcompress($color);
$info['smask'] = gzcompress($alpha);
if ($this->_pdfOutput->getDocument()->pdfVersion < '1.4') {
$this->_pdfOutput->getDocument()->pdfVersion = '1.4';
}
}
$info['data'] = $data;
return $info;
}
/**
* Add a TrueType, OpenType or Type1 font
*
* @param $family
* @param string $style
* @param string $file
* @param bool $uni
*/
public function addFont($family, $style = '', $file = '', $uni = false)
{
$family = strtolower($family);
$style = strtoupper($style);
$fontPath = $this->_pdfOutput->getDocument()->getFontPath();
if ($style == 'IB') {
$style = 'BI';
}
if ($file == '') {
if ($uni) {
$file = str_replace(' ', '', $family) . strtolower($style) . '.ttf';
} else {
$file = str_replace(' ', '', $family) . strtolower($style) . '.php';
}
}
$fontkey = $family . $style;
if (isset($this->fonts[$fontkey])) {
return;
}
if ($uni) {
if (defined("_SYSTEM_TTFONTS") && file_exists(_SYSTEM_TTFONTS . $file)) {
$ttffilename = _SYSTEM_TTFONTS . $file;
} else {
$ttffilename = $fontPath . 'Unifonts/' . $file;
}
$unifilename = $fontPath . 'Unifonts/' . strtolower(substr($file, 0, strpos($file, '.')));
$name = '';
$originalsize = 0;
$ttfstat = @stat($ttffilename);
if (file_exists($unifilename . '.mtx.php')) {
include $unifilename . '.mtx.php';
}
if (!isset($type) || !isset($name) || $originalsize != $ttfstat['size']) {
$ttffile = $ttffilename;
require_once $fontPath . 'Unifonts/ttfonts.php';
$ttf = new \TTFontFile();
$ttf->getMetrics($ttffile);
$cw = $ttf->charWidths;
$name = preg_replace('/[ ()]/', '', $ttf->fullName);
$desc = array('Ascent' => round($ttf->ascent), 'Descent' => round($ttf->descent), 'CapHeight' => round($ttf->capHeight), 'Flags' => $ttf->flags, 'FontBBox' => '[' . round($ttf->bbox[0]) . " " . round($ttf->bbox[1]) . " " . round($ttf->bbox[2]) . " " . round($ttf->bbox[3]) . ']', 'ItalicAngle' => $ttf->italicAngle, 'StemV' => round($ttf->stemV), 'MissingWidth' => round($ttf->defaultWidth));
$up = round($ttf->underlinePosition);
$ut = round($ttf->underlineThickness);
$originalsize = $ttfstat['size'] + 0;
$type = 'TTF';
// Generate metrics .php file
$s = '<?php' . "\n";
$s .= '$name = \'' . $name . "';\n";
$s .= '$type = \'' . $type . "';\n";
$s .= '$desc = ' . var_export($desc, true) . ";\n";
$s .= '$up = ' . $up . ";\n";
$s .= '$ut = ' . $ut . ";\n";
$s .= '$ttffile = \'' . $ttffile . "';\n";
$s .= '$originalsize = ' . $originalsize . ";\n";
$s .= '$fontkey = \'' . $fontkey . "';\n";
if (is_writable(dirname($this->_pdfOutput->getDocument()->getFontPath() . 'Unifonts/' . 'x'))) {
$fh = fopen($unifilename . '.mtx.php', "w");
fwrite($fh, $s, strlen($s));
fclose($fh);
$fh = fopen($unifilename . '.cw.dat', "wb");
fwrite($fh, $cw, strlen($cw));
fclose($fh);
@unlink($unifilename . '.cw127.php');
}
unset($ttf);
} else {
$cw = @file_get_contents($unifilename . '.cw.dat');
}
$i = count($this->fonts) + 1;
$aliasNbPages = $this->_pdfOutput->getDocument()->getAliasNbPages();
if (!empty($aliasNbPages)) {
$sbarr = range(0, 57);
} else {
$sbarr = range(0, 32);
}
$this->fonts[$fontkey] = array('i' => $i, 'type' => $type, 'name' => $name, 'desc' => $desc, 'up' => $up, 'ut' => $ut, 'cw' => $cw, 'ttffile' => $ttffile, 'fontkey' => $fontkey, 'subset' => $sbarr, 'unifilename' => $unifilename);
$this->_fontFiles[$fontkey] = array('length1' => $originalsize, 'type' => "TTF", 'ttffile' => $ttffile);
$this->_fontFiles[$file] = array('type' => "TTF");
unset($cw);
} else {
$info = $this->_loadfont($file);
$info['i'] = count($this->fonts) + 1;
if (!empty($info['diff'])) {
$n = array_search($info['diff'], $this->_diffs);
if (!$n) {
$n = count($this->_diffs) + 1;
$this->_diffs[$n] = $info['diff'];
}
$info['diffn'] = $n;
}
if (!empty($info['file'])) {
if ($info['type'] == 'TrueType') {
$this->_fontFiles[$info['file']] = array('length1' => $info['originalsize']);
} else {
$this->_fontFiles[$info['file']] = array('length1' => $info['size1'], 'length2' => $info['size2']);
}
}
$this->fonts[$fontkey] = $info;
}
}
