PHP读取汉字的点阵数据
PHP读取汉字的点阵数据
本文给大家详细讲述了使用PHP读取汉字的点阵数据的方法和示例,十分的实用,有需要的小伙伴可以参考下。
项目中遇到的问题:
PHP如何读取汉字的点阵数据?想实现输入一段文字,能得到这一段文字的所有点阵码。
解决方法:
简体中文国标字库7445个字符,其中汉字6773个,包括一级汉字3755个,二级汉字3008个。采用2字节(16位二进制)编码。
区位码:国标GB2312规定,所有的国标汉字与符号组成一个94×94的矩阵。在此方阵中,每一行称为一个”区”,每一列称为一个”位”,因此,这个方阵实际上组成了一个有94个区(区号分别为0 1到94)、每个区内有94个位(位号分别为01到94)的汉字字符集。一个汉字所在的区号和位号简单地组合在一起就构成了该汉字的”区位码”。在汉字的区位码中,高两位为区号,低两位为位号。由此可见,区位码与汉字或符号之间是一一对应的。
内码:汉字的内码是指在计算机中表示汉字的编码。机内码与区位码稍有区别。目前,对于国内大多数的计算机系统,一个汉字的内码占两个字节,分别称为高位字节与低位字节,且这两位字节与区位码的关系如下: 内码高位=区码+A0H(H表示十六进制) 内码低位=位码+A0H 例如,汉字”啊”的区位码为”1601″,区码和位码分别用十六进制表示即为”1001H”,则它的内码为”B0A1H”。其中B0H为内码的高位字节,A1H为内码的低位字节。
返回由0和1组成的字符串
?
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/** * 读取汉字点阵数据 * */
$str = "中华人民共和国";
$font_file_name = "simsun12.fon"; // 点阵字库文件名 $font_width = 12; // 单字宽度 $font_height = 12; // 单字高度 $start_offset = 0; // 偏移
$fp = fopen($font_file_name, "rb");
$offset_size = $font_width * $font_height / 8; $string_size = $font_width * $font_height; $dot_string = "";
for ($i = 0; $i { if (ord($str{$i}) > 160) { // 先求区位码,然后再计算其在区位码二维表中的位置,进而得出此字符在文件中的偏移 $offset = ((ord($str{$i}) - 0xa1) * 94 + ord($str{$i + 1}) - 0xa1) * $offset_size; $i ++; } else { $offset = (ord($str{$i}) + 156 - 1) * $offset_size; }
// 读取其点阵数据 fseek($fp, $start_offset + $offset, SEEK_SET); $bindot = fread($fp, $offset_size);
for ($j = 0; $j { // 将二进制点阵数据转化为字符串 $dot_string .= sprintf("%08b", ord($bindot{$j})); } }
fclose($fp);
echo $dot_string; ?> |
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