如何从.ttf文件中读取字体的标题？
如何从.ttf文件中读取字体的标题？
提问于 2011-04-15 03:55:00
我真的需要能够从.ttf真类型字体文件中提取元数据。
我正在建立一个所有设计师使用的字体的中央数据库(他们总是通过电子邮件交换字体来接管设计元素，等等)。我想得到所有的字体，一些有愚蠢的名字像00001.ttf，所以文件名没有帮助，但我知道字体有元数据，我需要一些方法来提取它在PHP中。
然后，我可以创建一个循环来查看我指定的目录，获取这些数据(以及我可以同时获取的任何其他数据)，并将其添加到数据库中。
我只是真的需要阅读这个元数据部分的帮助。
回答 2
Stack Overflow用户
发布于 2011-04-15 04:28:14
与之前发布的答案非常相似……我已经使用这个类很长时间了。
class fontAttributes extends baseClass
{
// --- ATTRIBUTES ---
/**
* @access private
* @var string
*/
private $_fileName = NULL ; // Name of the truetype font file
/**
* @access private
* @var string
*/
private $_copyright = NULL ; // Copyright
/**
* @access private
* @var string
*/
private $_fontFamily = NULL ; // Font Family
/**
* @access private
* @var string
*/
private $_fontSubFamily = NULL ; // Font SubFamily
/**
* @access private
* @var string
*/
private $_fontIdentifier = NULL ; // Font Unique Identifier
/**
* @access private
* @var string
*/
private $_fontName = NULL ; // Font Name
/**
* @access private
* @var string
*/
private $_fontVersion = NULL ; // Font Version
/**
* @access private
* @var string
*/
private $_postscriptName = NULL ; // Postscript Name
/**
* @access private
* @var string
*/
private $_trademark = NULL ; // Trademark
// --- OPERATIONS ---
private function _returnValue($inString)
{
if (ord($inString) == 0) {
if (function_exists('mb_convert_encoding')) {
return mb_convert_encoding($inString,"UTF-8","UTF-16");
} else {
return str_replace(chr(00),'',$inString);
}
} else {
return $inString;
}
} // function _returnValue()
/**
* @access public
* @return integer
*/
public function getCopyright()
{
return $this->_returnValue($this->_copyright);
} // function getCopyright()
/**
* @access public
* @return integer
*/
public function getFontFamily()
{
return $this->_returnValue($this->_fontFamily);
} // function getFontFamily()
/**
* @access public
* @return integer
*/
public function getFontSubFamily()
{
return $this->_returnValue($this->_fontSubFamily);
} // function getFontSubFamily()
/**
* @access public
* @return integer
*/
public function getFontIdentifier()
{
return $this->_returnValue($this->_fontIdentifier);
} // function getFontIdentifier()
/**
* @access public
* @return integer
*/
public function getFontName()
{
return $this->_returnValue($this->_fontName);
} // function getFontName()
/**
* @access public
* @return integer
*/
public function getFontVersion()
{
return $this->_returnValue($this->_fontVersion);
} // function getFontVersion()
/**
* @access public
* @return integer
*/
public function getPostscriptName()
{
return $this->_returnValue($this->_postscriptName);
} // function getPostscriptName()
/**
* @access public
* @return integer
*/
public function getTrademark()
{
return $this->_returnValue($this->_trademark);
} // function getTrademark()
/**
* Convert a big-endian word or longword value to an integer
*
* @access private
* @return integer
*/
private function _UConvert($bytesValue,$byteCount)
{
$retVal = 0;
$bytesLength = strlen($bytesValue);
for ($i=0; $i < $bytesLength; $i++) {
$tmpVal = ord($bytesValue{$i});
$t = pow(256,($byteCount-$i-1));
$retVal += $tmpVal*$t;
}
return $retVal;
} // function UConvert()
/**
* Convert a big-endian word value to an integer
*
* @access private
* @return integer
*/
private function _USHORT($stringValue) {
return $this->_UConvert($stringValue,2);
}
/**
* Convert a big-endian word value to an integer
*
* @access private
* @return integer
*/
private function _ULONG($stringValue) {
return $this->_UConvert($stringValue,4);
}
/**
* Read the Font Attributes
*
* @access private
* @return integer
*/
private function readFontAttributes() {
$fontHandle = fopen($this->_fileName, "rb");
// Read the file header
$TT_OFFSET_TABLE = fread($fontHandle, 12);
$uMajorVersion = $this->_USHORT(substr($TT_OFFSET_TABLE,0,2));
$uMinorVersion = $this->_USHORT(substr($TT_OFFSET_TABLE,2,2));
$uNumOfTables = $this->_USHORT(substr($TT_OFFSET_TABLE,4,2));
// $uSearchRange = $this->_USHORT(substr($TT_OFFSET_TABLE,6,2));
// $uEntrySelector = $this->_USHORT(substr($TT_OFFSET_TABLE,8,2));
// $uRangeShift = $this->_USHORT(substr($TT_OFFSET_TABLE,10,2));
// Check is this is a true type font and the version is 1.0
if ($uMajorVersion != 1 || $uMinorVersion != 0) {
fclose($fontHandle);
throw new Exception($this->_fileName.' is not a Truetype font file') ;
}
// Look for details of the name table
$nameTableFound = false;
for ($t=0; $t < $uNumOfTables; $t++) {
$TT_TABLE_DIRECTORY = fread($fontHandle, 16);
$szTag = substr($TT_TABLE_DIRECTORY,0,4);
if (strtolower($szTag) == 'name') {
// $uCheckSum = $this->_ULONG(substr($TT_TABLE_DIRECTORY,4,4));
$uOffset = $this->_ULONG(substr($TT_TABLE_DIRECTORY,8,4));
// $uLength = $this->_ULONG(substr($TT_TABLE_DIRECTORY,12,4));
$nameTableFound = true;
break;
}
}
if (!$nameTableFound) {
fclose($fontHandle);
throw new Exception('Can\'t find name table in '.$this->_fileName) ;
}
// Set offset to the start of the name table
fseek($fontHandle,$uOffset,SEEK_SET);
$TT_NAME_TABLE_HEADER = fread($fontHandle, 6);
// $uFSelector = $this->_USHORT(substr($TT_NAME_TABLE_HEADER,0,2));
$uNRCount = $this->_USHORT(substr($TT_NAME_TABLE_HEADER,2,2));
$uStorageOffset = $this->_USHORT(substr($TT_NAME_TABLE_HEADER,4,2));
$attributeCount = 0;
for ($a=0; $a < $uNRCount; $a++) {
$TT_NAME_RECORD = fread($fontHandle, 12);
$uNameID = $this->_USHORT(substr($TT_NAME_RECORD,6,2));
if ($uNameID <= 7) {
// $uPlatformID = $this->_USHORT(substr($TT_NAME_RECORD,0,2));
$uEncodingID = $this->_USHORT(substr($TT_NAME_RECORD,2,2));
// $uLanguageID = $this->_USHORT(substr($TT_NAME_RECORD,4,2));
$uStringLength = $this->_USHORT(substr($TT_NAME_RECORD,8,2));
$uStringOffset = $this->_USHORT(substr($TT_NAME_RECORD,10,2));
if ($uStringLength > 0) {
$nPos = ftell($fontHandle);
fseek($fontHandle,$uOffset + $uStringOffset + $uStorageOffset,SEEK_SET);
$testValue = fread($fontHandle, $uStringLength);
if (trim($testValue) > '') {
switch ($uNameID) {
case 0 : if ($this->_copyright == NULL) {
$this->_copyright = $testValue;
$attributeCount++;
}
break;
case 1 : if ($this->_fontFamily == NULL) {
$this->_fontFamily = $testValue;
$attributeCount++;
}
break;
case 2 : if ($this->_fontSubFamily == NULL) {
$this->_fontSubFamily = $testValue;
$attributeCount++;
}
break;
case 3 : if ($this->_fontIdentifier == NULL) {
$this->_fontIdentifier = $testValue;
$attributeCount++;
}
break;
case 4 : if ($this->_fontName == NULL) {
$this->_fontName = $testValue;
$attributeCount++;
}
break;
case 5 : if ($this->_fontVersion == NULL) {
$this->_fontVersion = $testValue;
$attributeCount++;
}
break;
case 6 : if ($this->_postscriptName == NULL) {
$this->_postscriptName = $testValue;
$attributeCount++;
}
break;
case 7 : if ($this->_trademark == NULL) {
$this->_trademark = $testValue;
$attributeCount++;
}
break;
}
}
fseek($fontHandle,$nPos,SEEK_SET);
}
}
if ($attributeCount > 7) {
break;
}
}
fclose($fontHandle);
return true;
}
/**
* @access constructor
* @return void
*/
function __construct($fileName='') {
if ($fileName == '') {
throw new Exception('Font File has not been specified') ;
}
$this->_fileName = $fileName;
if (!file_exists($this->_fileName)) {
throw new Exception($this->_fileName.' does not exist') ;
} elseif (!is_readable($this->_fileName)) {
throw new Exception($this->_fileName.' is not a readable file') ;
}
return $this->readFontAttributes();
} // function constructor()
} /* end of class fontAttributes */Stack Overflow用户
发布于 2014-12-30 23:53:39
既然DOMPDF项目的优秀人员已经为您完成了工作，为什么还要重新发明轮子呢？查看php-font-lib @ https://github.com/PhenX/php-font-lib。它具有您所要求的所有功能，还支持其他字体格式。查看演示UI @ http://pxd.me/php-font-lib/www/font_explorer.html，了解您可以从该库中获取哪些类型的信息。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/5668901
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