[ft] How to get a glyph index of Japanese charactor
Hello, every one: I am a beginner of freeType2 library. I have a problem about how to get a glyph index of Japanese charactor. I use the function FT_Get_Char_Index to get a glyph index. This function needs a parameter named charcode. For a English charactor, its charcode is indeed the ASCII code (binary code), but for a Japanese charactor, I don't know what the charcode should be? I am using the default FT_ENCODING_UNICODE charmap which contains Japanese font. When I set the charcode to be its binary code (eg. 0xE38193), glyph index 0 is returned. There is anyone who can get the glyph index of the charactor in a Japanese text ? please help me. Thank you for your support. Regards Hongyu Zhang [EMAIL PROTECTED] ___ Freetype mailing list Freetype@nongnu.org http://lists.nongnu.org/mailman/listinfo/freetype
Re: [ft] How to get a glyph index of Japanese charactor
Hi, Hongyu Zhang wrote (2008/08/27 20:10): I am using the default FT_ENCODING_UNICODE charmap which contains Japanese font. Basically it's OK. Some legacy fonts designed for classic MacOS have only Shift-JIS encoding (no Unicode encoding interface), but most fonts produced recently have Unicode interfaces. In such case, you have to use some character encoding conversion library (e.g. iconv). FreeType2 does not provide encoding conversion mechanism. When I set the charcode to be its binary code (eg. 0xE38193), glyph index 0 is returned. Hmm, I'm not sure what the encoding you wanted use. Regarding the 24bit length of 0xE38193, I guess you wanted to use UTF-8. Please try UCS-4 codepoint (e.g. 0x3042, the UCS-4 codepoint of hiragana A). Regards, mpsuzuki ___ Freetype mailing list Freetype@nongnu.org http://lists.nongnu.org/mailman/listinfo/freetype
Re: [ft] How to get a glyph index of Japanese charactor
suzuki toshiya wrote (2008/08/27 22:25): When I set the charcode to be its binary code (eg. 0xE38193), glyph index 0 is returned. Hmm, I'm not sure what the encoding you wanted use. Regarding the 24bit length of 0xE38193, I guess you wanted to use UTF-8. Please try UCS-4 codepoint (e.g. 0x3042, the UCS-4 codepoint of hiragana A). I slipped to note why you can use UCS-4 but you cannot UTF-8. As I've written in previous post, FreeType2 does not have the convertor of character encoding, even if it's simple mathematics (like UTF8 - UCS-4). So, what kind of character encoding is available? is completely defined by the contents of font file. At present, TrueType fonts supports UCS-2, UCS-4, Shift-JIS, GB 2312, Big 5, Wansung, etc, but no support for UTF-8. So, you cannot use UTF-8 to lookup a glyph in Japanese TrueType font. Regards, mpsuzuki ___ Freetype mailing list Freetype@nongnu.org http://lists.nongnu.org/mailman/listinfo/freetype
