>
> 2012/3/6 Behdad Esfahbod <
behdad behdad org>:
>> You have a better luck just copying basic-fc.c and modifying it, and either
>> installing your module on the system or register it using pango_module_register().
>>
>> behdad
>>
>> On 03/01/2012 08:28 AM, Mindaugas Jaunius wrote:
>>> Hi,
>>>
>>> To be able to fully control open type font features (liga, smcp, ssup)
>>> I ended up using PangoOTBuffer not just PangoLayout. No the problem I
>>> run into is that the output of PangoOTBuffer is PangoGlyphString. The
>>> only function I found to show it is pango_cairo_show_glyph_string(cr,
>>> font, glyphString), but this function shows the full PangoGlyphString
>>> in one line and does not create a wraping paragraph on PangoLayout. No
>>> is there a way to give my PangoGlyphString from PangoOTBuffer to
>>> PangoLayout?
>>>
>>> Below is some code of how I am using PangoOTBuffer now. Mainly I used
>>> code from pango modules class basic-fc.c as an example. Any comments
>>> and critiques on the code are welcomed.
>>>
>>> const char foo[] = "ffi ff fl Wa VA";
>>>
>>> static const PangoOTFeatureMap gsub_features[] =
>>> {
>>> {"ccmp", PANGO_OT_ALL_GLYPHS},
>>> {"locl", PANGO_OT_ALL_GLYPHS},
>>> {"liga", PANGO_OT_ALL_GLYPHS},
>>> {"clig", PANGO_OT_ALL_GLYPHS}
>>> };
>>>
>>> static const PangoOTFeatureMap gpos_features[] =
>>> {
>>> {"kern", PANGO_OT_ALL_GLYPHS},
>>> {"mark", PANGO_OT_ALL_GLYPHS},
>>> {"mkmk", PANGO_OT_ALL_GLYPHS}
>>> };
>>>
>>> cairo_t *cr = cairo_create(surface);
>>> cairo_set_source_rgb(cr, 1.0, 1.0, 1.0); // sets the background color to white
>>> cairo_paint(cr);
>>>
>>> PangoLayout *layout; // layout for a paragraph of text
>>> layout = pango_cairo_create_layout(cr);
>>>
>>> PangoFontDescription *descFont;
>>> pango_layout_set_text(layout, foo, -1);
>>> pango_layout_set_width(layout, width * PANGO_SCALE);
>>> descFont = pango_font_description_from_string("Fedra Serif Pro A Book 20");
>>> pango_layout_set_font_description(layout, descFont);
>>> pango_font_description_free(descFont);
>>>
>>> cairo_move_to(cr, 20, 40);
>>> cairo_set_line_width(cr, 1.0); // sets the line width, default is 2.0
>>>
>>> cairo_set_source_rgb(cr, 0.0, 0.0, 0.0); // set the colour to black
>>>
>>> pango_cairo_update_layout(cr, layout); // update layout
>>>
>>> PangoLayoutIter *iter = NULL;
>>> iter = pango_layout_get_iter(layout);
>>>
>>> PangoLayoutRun *run = NULL;
>>> run = pango_layout_iter_get_run_readonly(iter);
>>>
>>> PangoFont *font = run->item->analysis.font; // get PangoFont of Fedra Serif
>>>
>>> PangoFcFont *fc_font = PANGO_FC_FONT(font);
>>>
>>> PangoOTBuffer *otBuffer;
>>> otBuffer = pango_ot_buffer_new(fc_font);
>>>
>>> glong n_chars = g_utf8_strlen(foo, strlen(foo));
>>> PangoGlyphString *glyphs = pango_glyph_string_new();
>>>
>>> const char *p = foo;
>>> int cluster = 0;
>>> int i;
>>> FT_Face face;
>>> PangoOTRulesetDescription desc;
>>> const PangoOTRuleset *ruleset;
>>>
>>> face = pango_fc_font_lock_face(fc_font);
>>> if (!face) {
>>> LOGE("Can not lock fc font face");
>>> }
>>>
>>> // add all glyphs to otBuffer
>>> for (i = 0; i < n_chars; i++) {
>>> gunichar wc;
>>> PangoGlyph glyph;
>>>
>>> wc = g_utf8_get_char(p);
>>>
>>> if (g_unichar_type(wc) != G_UNICODE_NON_SPACING_MARK)
>>> cluster = p - foo1;
>>>
>>> if (pango_is_zero_width(wc))
>>> glyph = PANGO_GLYPH_EMPTY;
>>> else {
>>> gunichar c = wc;
>>>
>>> if (run->item->analysis.level % 2)
>>> g_unichar_get_mirror_char(c, &c);
>>>
>>> glyph = pango_fc_font_get_glyph(fc_font, c);
>>> }
>>>
>>> if (!glyph)
>>> glyph = PANGO_GET_UNKNOWN_GLYPH(wc);
>>>
>>> pango_ot_buffer_add_glyph(otBuffer, glyph, 0, cluster);
>>>
>>> p = g_utf8_next_char(p);
>>> }
>>>
>>> // apply open type features
>>> desc.script = run->item->analysis.script;
>>> desc.language = run->item->analysis.language;
>>> desc.n_static_gsub_features = G_N_ELEMENTS(gsub_features);
>>> desc.static_gsub_features = gsub_features;
>>> desc.n_static_gpos_features = G_N_ELEMENTS(gpos_features);
>>> desc.static_gpos_features = gpos_features;
>>> desc.n_other_features = 0;
>>> desc.other_features = NULL;
>>>
>>> ruleset = pango_ot_ruleset_get_for_description(pango_ot_info_get(face), &desc);
>>>
>>> pango_ot_ruleset_substitute(ruleset, otBuffer);
>>> pango_ot_ruleset_position(ruleset, otBuffer);
>>>
>>> // output from otBuffer to PangoGlyphString
>>> pango_ot_buffer_output(otBuffer, glyphs);
>>>
>>> pango_cairo_show_glyph_string(cr, font, glyphs);
>>>
>>> -mindaugas
>>> _______________________________________________
>>> gtk-i18n-list mailing list
>>>
gtk-i18n-list gnome org
>>>
http://mail.gnome.org/mailman/listinfo/gtk-i18n-list
>>>
>
