Dear Konstantin, I got it! Thank you for your help. Best regards, 发件人: Konstantin Ritt <ritt.ks@gmail.com> 收件人: ff.feng@sunmedia.com.cn 抄送: Harfbuzz <harfbuzz@lists.freedesktop.org> 日期: 2014/10/30 21:01 主题: Re: [HarfBuzz] How many unicode make up a glyph? <hr noshade> Hi, if I understood you correctly, you're talking about the Unicode code point to glyph mapping (aka logical to visual cluster mapping). If so, it would look like {code} const uint16_t *string = ..; // UTF-16 string int str_len = ..; // length of `string` buffer hb_buffer_add_utf16(buffer, string, str_len, 0, str_len); .. hb_shape_full(..); const uint num_glyphs = hb_buffer_get_length(buffer); ensureSpace(num_glyphs); // ensure we have enough space for shaped glyphs and metrics (here we reallocate the `glyphs`, `advances`, and `offsets` buffers, if needed) ushort *log_clusters = ..; uint *glyphs = ..; float *advances = ..; float *offsets_x = ..; float *offsets_y = ..; // fetch the shaped glyphs and metrics b_glyph_info_t *infos = hb_buffer_get_glyph_infos(buffer, 0); hb_glyph_position_t *positions = hb_buffer_get_glyph_positions(buffer, 0); uint str_pos = 0; uint last_cluster = ~0u; uint last_glyph_pos = 0; for (uint i = 0; i < num_glyphs; ++i) { glyphs[i] = infos[i].codepoint; advances[i] = positions[i].x_advance; offsets_x[i] = positions[i].x_offset; offsets_y[i] = positions[i].y_offset; uint cluster = infos[i].cluster; if (last_cluster != cluster) { // fix up clusters so that the cluster indices will be monotonic // and thus we never return out-of-order indices while (last_cluster++ < cluster && str_pos < str_len) log_clusters[str_pos++] = last_glyph_pos; // [last_glyph_pos..i) forms a single glyph cluster; if you have glyph attributes, here you could remember the cluster start for iterating over the glyph clusters later, e.g. attribs[i].clusterStart = true; last_glyph_pos = i; last_cluster = cluster; } } while (str_pos < str_len) log_clusters[str_pos++] = last_glyph_pos; {code} Regards, Konstantin 2014-10-30 6:50 GMT+04:00 <<a href=mailto:ff.feng@sunmedia.com.cn target=_blank>ff.feng@sunmedia.com.cn</a>>: Hi ! I'm developing a font engine with harfbuzz & freetype for Cambodia. I can get the correct glyph index array and position array by harfbuzz. That's sweet. Now I got a problem : I'm wondering how many unicode(UTF16) form a glyph? (If I specify a item in the glyph index array from hb_buffer_get_glyph_infos) thanks a lot & sorry for my poor English. Best regards, ********************************************************************** The preceding e-mail message (including any attachments) may contain confidential information intended for a specific individual and purpose.If you are not an intended recipient of this message, please notify the sender by replying to this message and then delete it from your system.Use,dissemination, distribution, or reproduction of this message by unintended recipients is not authorized and may be unlawful. ********************************************************************** _______________________________________________ HarfBuzz mailing list <a href=mailto:HarfBuzz@lists.freedesktop.org>HarfBuzz@lists.freedesktop.org</a> <a href=http://lists.freedesktop.org/mailman/listinfo/harfbuzz target=_blank>http://lists.freedesktop.org/mailman/listinfo/harfbuzz</a>