function _parsegif($file, $mem = false)
{
require_once 'gif.php';
$h = 0;
$w = 0;
$gif = new CGIF();
if ($mem) {
$ret = $gif->loadFile_mem($file, 0);
} else {
$ret = $gif->loadFile($file, 0);
}
if (!$ret) {
return null;
}
if (empty($gif->m_img->m_data)) {
return null;
}
if ($gif->m_img->m_gih->m_bLocalClr) {
$nColors = $gif->m_img->m_gih->m_nTableSize;
$pal = $gif->m_img->m_gih->m_colorTable->toString();
$colspace = 'Indexed';
} elseif ($gif->m_gfh->m_bGlobalClr) {
$nColors = $gif->m_gfh->m_nTableSize;
$pal = $gif->m_gfh->m_colorTable->toString();
$colspace = 'Indexed';
} else {
$nColors = 0;
$colspace = 'DeviceGray';
$pal = '';
}
$trns = '';
if ($gif->m_img->m_bTrans && $nColors > 0) {
$trns = array($gif->m_img->m_nTrans);
}
$data = $gif->m_img->m_data;
$w = $gif->m_gfh->m_nWidth;
$h = $gif->m_gfh->m_nHeight;
if ($colspace == 'Indexed' and empty($pal)) {
return false;
}
if ($this->compress) {
$data = gzcompress($data);
return array('w' => $w, 'h' => $h, 'cs' => $colspace, 'bpc' => 8, 'f' => 'FlateDecode', 'pal' => $pal, 'trns' => $trns, 'data' => $data);
} else {
return array('w' => $w, 'h' => $h, 'cs' => $colspace, 'bpc' => 8, 'pal' => $pal, 'trns' => $trns, 'data' => $data);
}
}
