function read_tgz_data($data, $destination, $single_file = false, $overwrite = false, $files_to_extract = null)
{
// Make sure we have this loaded.
loadLanguage('Packages');
// This function sorta needs gzinflate!
if (!function_exists('gzinflate')) {
fatal_lang_error('package_no_zlib', 'critical');
}
umask(0);
if (!$single_file && $destination !== null && !file_exists($destination)) {
mktree($destination, 0777);
}
// No signature?
if (strlen($data) < 2) {
return false;
}
$id = unpack('H2a/H2b', substr($data, 0, 2));
if (strtolower($id['a'] . $id['b']) != '1f8b') {
// Okay, this ain't no tar.gz, but maybe it's a zip file.
if (substr($data, 0, 2) == 'PK') {
return read_zip_data($data, $destination, $single_file, $overwrite, $files_to_extract);
} else {
return false;
}
}
$flags = unpack('Ct/Cf', substr($data, 2, 2));
// Not deflate!
if ($flags['t'] != 8) {
return false;
}
$flags = $flags['f'];
$offset = 10;
$octdec = array('mode', 'uid', 'gid', 'size', 'mtime', 'checksum', 'type');
// "Read" the filename and comment. // !!! Might be mussed.
if ($flags & 12) {
while ($flags & 8 && $data[$offset++] != "") {
continue;
}
while ($flags & 4 && $data[$offset++] != "") {
continue;
}
}
$crc = unpack('Vcrc32/Visize', substr($data, strlen($data) - 8, 8));
$data = @gzinflate(substr($data, $offset, strlen($data) - 8 - $offset));
// smf_crc32 and crc32 may not return the same results, so we accept either.
if ($crc['crc32'] != smf_crc32($data) && $crc['crc32'] != crc32($data)) {
return false;
}
$blocks = strlen($data) / 512 - 1;
$offset = 0;
$return = array();
while ($offset < $blocks) {
$header = substr($data, $offset << 9, 512);
$current = unpack('a100filename/a8mode/a8uid/a8gid/a12size/a12mtime/a8checksum/a1type/a100linkname/a6magic/a2version/a32uname/a32gname/a8devmajor/a8devminor/a155path', $header);
// Blank record? This is probably at the end of the file.
if (empty($current['filename'])) {
$offset += 512;
continue;
}
if ($current['type'] == 5 && substr($current['filename'], -1) != '/') {
$current['filename'] .= '/';
}
foreach ($current as $k => $v) {
if (in_array($k, $octdec)) {
$current[$k] = octdec(trim($v));
} else {
$current[$k] = trim($v);
}
}
$checksum = 256;
for ($i = 0; $i < 148; $i++) {
$checksum += ord($header[$i]);
}
for ($i = 156; $i < 512; $i++) {
$checksum += ord($header[$i]);
}
if ($current['checksum'] != $checksum) {
break;
}
$size = ceil($current['size'] / 512);
$current['data'] = substr($data, ++$offset << 9, $current['size']);
$offset += $size;
// Not a directory and doesn't exist already...
if (substr($current['filename'], -1, 1) != '/' && !file_exists($destination . '/' . $current['filename'])) {
$write_this = true;
} elseif (substr($current['filename'], -1, 1) != '/') {
$write_this = $overwrite || filemtime($destination . '/' . $current['filename']) < $current['mtime'];
} elseif ($destination !== null && !$single_file) {
// Protect from accidental parent directory writing...
$current['filename'] = strtr($current['filename'], array('../' => '', '/..' => ''));
if (!file_exists($destination . '/' . $current['filename'])) {
mktree($destination . '/' . $current['filename'], 0777);
}
$write_this = false;
} else {
$write_this = false;
}
if ($write_this && $destination !== null) {
if (strpos($current['filename'], '/') !== false && !$single_file) {
mktree($destination . '/' . dirname($current['filename']), 0777);
}
// Is this the file we're looking for?
if ($single_file && ($destination == $current['filename'] || $destination == '*/' . basename($current['filename']))) {
return $current['data'];
} elseif ($single_file) {
continue;
} elseif ($files_to_extract !== null && !in_array($current['filename'], $files_to_extract)) {
continue;
}
package_put_contents($destination . '/' . $current['filename'], $current['data']);
}
if (substr($current['filename'], -1, 1) != '/') {
$return[] = array('filename' => $current['filename'], 'md5' => md5($current['data']), 'preview' => substr($current['data'], 0, 100), 'size' => $current['size'], 'skipped' => false);
}
}
if ($destination !== null && !$single_file) {
package_flush_cache();
}
if ($single_file) {
return false;
} else {
return $return;
}
}
public function get_png_data($background_color)
{
if (!$this->loaded) {
return false;
}
// Prepare the color table.
if ($this->image->m_gih->m_bLocalClr) {
$colors = $this->image->m_gih->m_nTableSize;
$pal = $this->image->m_gih->m_colorTable->toString();
if ($background_color != -1) {
$background_color = $this->image->m_gih->m_colorTable->colorIndex($background_color);
}
} elseif ($this->header->m_bGlobalClr) {
$colors = $this->header->m_nTableSize;
$pal = $this->header->m_colorTable->toString();
if ($background_color != -1) {
$background_color = $this->header->m_colorTable->colorIndex($background_color);
}
} else {
$colors = 0;
$background_color = -1;
}
if ($background_color == -1) {
$background_color = $this->header->m_nBgColor;
}
$data =& $this->image->m_data;
$header =& $this->image->m_gih;
$i = 0;
$bmp = '';
// Prepare the bitmap itself.
for ($y = 0; $y < $this->header->m_nHeight; $y++) {
$bmp .= "";
for ($x = 0; $x < $this->header->m_nWidth; $x++, $i++) {
// Is this in the proper range? If so, get the specific pixel data...
if ($x >= $header->m_nLeft && $y >= $header->m_nTop && $x < $header->m_nLeft + $header->m_nWidth && $y < $header->m_nTop + $header->m_nHeight) {
$bmp .= $data[$i];
} else {
$bmp .= chr($background_color);
}
}
}
$bmp = gzcompress($bmp, 9);
// Output the basic signature first of all.
$out = "‰PNG\r\n\n";
// Now, we want the header...
$out .= "\r";
$tmp = 'IHDR' . pack('N', (int) $this->header->m_nWidth) . pack('N', (int) $this->header->m_nHeight) . "";
$out .= $tmp . pack('N', smf_crc32($tmp));
// The palette, assuming we have one to speak of...
if ($colors > 0) {
$out .= pack('N', (int) $colors * 3);
$tmp = 'PLTE' . $pal;
$out .= $tmp . pack('N', smf_crc32($tmp));
}
// Do we have any transparency we want to make available?
if ($this->image->m_bTrans && $colors > 0) {
$out .= pack('N', (int) $colors);
$tmp = 'tRNS';
// Stick each color on - full transparency or none.
for ($i = 0; $i < $colors; $i++) {
$tmp .= $i == $this->image->m_nTrans ? "" : "ÿ";
}
$out .= $tmp . pack('N', smf_crc32($tmp));
}
// Here's the data itself!
$out .= pack('N', strlen($bmp));
$tmp = 'IDAT' . $bmp;
$out .= $tmp . pack('N', smf_crc32($tmp));
// EOF marker...
$out .= "" . 'IEND' . "®B`‚";
return $out;
}