A brief talk on Pdflib Chinese output (iv) Several text input forms received by pdflib

The Pdflib textformat parameter is used to set the text input form with the following valid values:

Bytes: Each byte in the string corresponds to one character. Mainly applies to 8-bit coding.

UTF8: string is UTF-8 encoding.

Ebcdicutf8: String is a EBCDIC UTF-8 encoding that applies only to IBM iseries and zseries.

UTF16: string is UTF-16 encoding. If the string begins with a Unicode tagged byte order number (BOM), Pdflib receives the BOM information and moves it from the string header. If the string does not have a BOM, the byte order of the string depends on the byte order of the host. The Intel x86 system is a small tail (Little-endian,0xfffe), while the SPARC and PowerPC systems are large tails (Big-endian, 0xFEFF).

Utf16be: String is the UTF-16 encoding of the large-tailed byte order. There is no special treatment for the BOM.

Utf16le: String is the UTF-16 encoding of the small-tailed byte order. There is no special treatment for the BOM.

Auto: For 8-bit encodings, it is equivalent to "bytes", which is equivalent to "CMAP" for wide-character strings (Unicode, Glyphid, UCS2, or UTF16 utf16).

In the programming language, we will be able to automatically handle Unicode strings in languages called Support Unicode languages (unicode-capable), which are COM,. NET, Java, REALbasic, and Tcl. Languages that require special handling of Unicode strings are called Unsupported Unicode languages (non-unicode-capable), which are C, C + +, Cobol, Perl, PHP, Python, and RPG.

In the non-unicode-capable language, the "auto" setting will handle most of the text strings correctly.

For the unicode-capable language, the default value for the TextFormat parameter is "UTF16", and the default value for the Non-unicode-capable language is "Auto".

In addition, Pdflib also supports character-referencing methods (Character Reference) that are often used in SGML and HTML. The premise is to set the parameter charref to True, TextFormat set to "bytes":

PDF_set_parameter(p, "charref", "true");
PDF_set_parameter(p, "textformat", "bytes");Here are some valid character Reference:

& #173; Soft hyphen

& #xAD; Soft hyphen

­ Soft hyphen

& #x20AC; Euro Glyph (hexadecimal)

& #8364; Euro Glyph (decimal)

€ Euro Glyph (Entity name)

< Less than sign

> Greater than sign

& Ampersand sign

Α Greek Alpha