365 lines
8.4 KiB
PHP
365 lines
8.4 KiB
PHP
<?php
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/**
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* @package php-font-lib
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* @link https://github.com/PhenX/php-font-lib
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* @author Fabien Ménager <fabien.menager@gmail.com>
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* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
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*/
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/**
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* Generic font file binary stream.
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*
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* @package php-font-lib
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*/
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class Font_Binary_Stream {
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/**
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* @var resource The file pointer
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*/
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protected $f;
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const uint8 = 1;
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const int8 = 2;
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const uint16 = 3;
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const int16 = 4;
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const uint32 = 5;
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const int32 = 6;
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const shortFrac = 7;
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const Fixed = 8;
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const FWord = 9;
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const uFWord = 10;
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const F2Dot14 = 11;
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const longDateTime = 12;
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const char = 13;
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const modeRead = "rb";
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const modeWrite = "wb";
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const modeReadWrite = "rb+";
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static function backtrace(){
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var_dump(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS));
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}
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/**
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* Open a font file in read mode
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*
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* @param string $filename The file name of the font to open
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*
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* @return bool
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*/
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public function load($filename) {
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return $this->open($filename, self::modeRead);
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}
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/**
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* Open a font file in a chosen mode
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*
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* @param string $filename The file name of the font to open
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* @param string $mode The opening mode
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*
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* @throws Exception
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* @return bool
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*/
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public function open($filename, $mode = self::modeRead) {
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if (!in_array($mode, array(self::modeRead, self::modeWrite, self::modeReadWrite))) {
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throw new Exception("Unkown file open mode");
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}
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$this->f = fopen($filename, $mode);
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return $this->f != false;
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}
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/**
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* Close the internal file pointer
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*/
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public function close() {
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return fclose($this->f) != false;
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}
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/**
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* Change the internal file pointer
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*
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* @param resource $fp
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*
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* @throws Exception
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*/
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public function setFile($fp) {
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if (!is_resource($fp)) {
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throw new Exception('$fp is not a valid resource');
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}
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$this->f = $fp;
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}
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/**
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* Create a temporary file in write mode
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*
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* @param bool $allow_memory Allow in-memory files
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*
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* @return resource the temporary file pointer resource
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*/
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public static function getTempFile($allow_memory = true) {
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$f = null;
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if ($allow_memory) {
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// PHP 5.1+
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@fopen("php://temp", "rb+");
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}
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if (!$f) {
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$f = fopen(tempnam(sys_get_temp_dir(), "fnt"), "rb+");
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}
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return $f;
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}
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/**
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* Move the internal file pinter to $offset bytes
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*
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* @param int $offset
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*
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* @return bool True if the $offset position exists in the file
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*/
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public function seek($offset) {
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return fseek($this->f, $offset, SEEK_SET) == 0;
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}
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/**
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* Gives the current position in the file
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*
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* @return int The current position
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*/
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public function pos() {
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return ftell($this->f);
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}
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public function skip($n) {
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fseek($this->f, $n, SEEK_CUR);
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}
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public function read($n) {
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if ($n < 1) {
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return "";
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}
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return fread($this->f, $n);
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}
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public function write($data, $length = null) {
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if ($data === null || $data === "") {
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return 0;
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}
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return fwrite($this->f, $data, $length);
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}
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public function readUInt8() {
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return ord($this->read(1));
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}
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public function writeUInt8($data) {
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return $this->write(chr($data), 1);
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}
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public function readInt8() {
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$v = $this->readUInt8();
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if ($v >= 0x80) {
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$v -= 0x100;
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}
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return $v;
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}
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public function writeInt8($data) {
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if ($data < 0) {
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$data += 0x100;
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}
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return $this->writeUInt8($data);
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}
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public function readUInt16() {
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$a = unpack("nn", $this->read(2));
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return $a["n"];
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}
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public function readUFWord(){
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return $this->readUInt16();
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}
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public function writeUInt16($data) {
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return $this->write(pack("n", $data), 2);
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}
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public function writeUFWord($data){
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return $this->writeUInt16($data);
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}
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public function readInt16() {
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$v = $this->readUInt16();
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if ($v >= 0x8000) {
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$v -= 0x10000;
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}
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return $v;
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}
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public function readFWord(){
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return $this->readInt16();
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}
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public function writeInt16($data) {
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if ($data < 0) {
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$data += 0x10000;
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}
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return $this->writeUInt16($data);
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}
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public function writeFWord($data){
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return $this->writeInt16($data);
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}
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public function readUInt32() {
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$a = unpack("NN", $this->read(4));
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return $a["N"];
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}
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public function writeUInt32($data) {
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return $this->write(pack("N", $data), 4);
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}
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public function readFixed() {
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$d = $this->readInt16();
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$d2 = $this->readUInt16();
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return round($d + $d2 / 0x10000, 4);
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}
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public function writeFixed($data) {
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$left = floor($data);
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$right = ($data - $left) * 0x10000;
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return $this->writeInt16($left) + $this->writeUInt16($right);
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}
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public function readLongDateTime() {
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$this->readUInt32(); // ignored
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$date = $this->readUInt32() - 2082844800;
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return strftime("%Y-%m-%d %H:%M:%S", $date);
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}
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public function writeLongDateTime($data) {
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$date = strtotime($data);
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$date += 2082844800;
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return $this->writeUInt32(0) + $this->writeUInt32($date);
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}
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public function unpack($def) {
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$d = array();
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foreach($def as $name => $type) {
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$d[$name] = $this->r($type);
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}
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return $d;
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}
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public function pack($def, $data) {
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$bytes = 0;
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foreach($def as $name => $type) {
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$bytes += $this->w($type, $data[$name]);
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}
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return $bytes;
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}
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/**
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* Read a data of type $type in the file from the current position
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*
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* @param mixed $type The data type to read
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*
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* @return mixed The data that was read
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*/
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public function r($type) {
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switch($type) {
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case self::uint8: return $this->readUInt8();
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case self::int8: return $this->readInt8();
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case self::uint16: return $this->readUInt16();
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case self::int16: return $this->readInt16();
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case self::uint32: return $this->readUInt32();
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case self::int32: return $this->readUInt32();
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case self::shortFrac: return $this->readFixed();
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case self::Fixed: return $this->readFixed();
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case self::FWord: return $this->readInt16();
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case self::uFWord: return $this->readUInt16();
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case self::F2Dot14: return $this->readInt16();
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case self::longDateTime: return $this->readLongDateTime();
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case self::char: return $this->read(1);
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default:
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if ( is_array($type) ) {
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if ($type[0] == self::char) {
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return $this->read($type[1]);
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}
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$ret = array();
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for($i = 0; $i < $type[1]; $i++) {
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$ret[] = $this->r($type[0]);
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}
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return $ret;
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}
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return null;
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}
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}
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/**
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* Write $data of type $type in the file from the current position
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*
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* @param mixed $type The data type to write
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* @param mixed $data The data to write
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*
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* @return int The number of bytes read
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*/
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public function w($type, $data) {
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switch($type) {
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case self::uint8: return $this->writeUInt8($data);
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case self::int8: return $this->writeInt8($data);
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case self::uint16: return $this->writeUInt16($data);
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case self::int16: return $this->writeInt16($data);
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case self::uint32: return $this->writeUInt32($data);
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case self::int32: return $this->writeUInt32($data);
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case self::shortFrac: return $this->writeFixed($data);
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case self::Fixed: return $this->writeFixed($data);
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case self::FWord: return $this->writeInt16($data);
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case self::uFWord: return $this->writeUInt16($data);
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case self::F2Dot14: return $this->writeInt16($data);
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case self::longDateTime: return $this->writeLongDateTime($data);
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case self::char: return $this->write($data, 1);
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default:
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if ( is_array($type) ) {
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if ($type[0] == self::char) {
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return $this->write($data, $type[1]);
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}
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$ret = 0;
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for($i = 0; $i < $type[1]; $i++) {
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$ret += $this->w($type[0], $data[$i]);
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}
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return $ret;
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}
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return null;
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}
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}
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/**
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* Converts a Uint32 value to string
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*
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* @param int $uint32
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*
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* @return string The string
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*/
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public function convertUInt32ToStr($uint32) {
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return chr(($uint32 >> 24) & 0xFF).chr(($uint32 >> 16) & 0xFF).chr(($uint32 >> 8) & 0xFF).chr($uint32 & 0xFF);
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}
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}
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