60 hb_codepoint_t u_glyph, s_glyph;
61
62 if (!s ||
63 !hb_font_get_glyph (font, u, 0, &u_glyph) ||
64 !hb_font_get_glyph (font, s, 0, &s_glyph) ||
65 u_glyph == s_glyph ||
66 u_glyph > 0xFFFFu || s_glyph > 0xFFFFu)
67 continue;
68
69 glyphs[num_glyphs].set (u_glyph);
70 substitutes[num_glyphs].set (s_glyph);
71
72 num_glyphs++;
73 }
74
75 if (!num_glyphs)
76 return nullptr;
77
78 /* Bubble-sort or something equally good!
79 * May not be good-enough for presidential candidate interviews, but good-enough for us... */
80 hb_stable_sort (&glyphs[0], num_glyphs, OT::GlyphID::cmp, &substitutes[0]);
81
82 OT::Supplier<OT::GlyphID> glyphs_supplier (glyphs, num_glyphs);
83 OT::Supplier<OT::GlyphID> substitutes_supplier (substitutes, num_glyphs);
84
85 /* Each glyph takes four bytes max, and there's some overhead. */
86 char buf[(SHAPING_TABLE_LAST - SHAPING_TABLE_FIRST + 1) * 4 + 128];
87 OT::hb_serialize_context_t c (buf, sizeof (buf));
88 OT::SubstLookup *lookup = c.start_serialize<OT::SubstLookup> ();
89 bool ret = lookup->serialize_single (&c,
90 OT::LookupFlag::IgnoreMarks,
91 glyphs_supplier,
92 substitutes_supplier,
93 num_glyphs);
94 c.end_serialize ();
95 /* TODO sanitize the results? */
96
97 return ret ? c.copy<OT::SubstLookup> () : nullptr;
98 }
99
100 static OT::SubstLookup *
109 /* We know that all our ligatures are 2-component */
110 OT::GlyphID ligature_list[ARRAY_LENGTH_CONST (first_glyphs) * ARRAY_LENGTH_CONST(ligature_table[0].ligatures)];
111 unsigned int component_count_list[ARRAY_LENGTH_CONST (ligature_list)];
112 OT::GlyphID component_list[ARRAY_LENGTH_CONST (ligature_list) * 1/* One extra component per ligature */];
113 unsigned int num_ligatures = 0;
114
115 /* Populate arrays */
116
117 /* Sort out the first-glyphs */
118 for (unsigned int first_glyph_idx = 0; first_glyph_idx < ARRAY_LENGTH (first_glyphs); first_glyph_idx++)
119 {
120 hb_codepoint_t first_u = ligature_table[first_glyph_idx].first;
121 hb_codepoint_t first_glyph;
122 if (!hb_font_get_glyph (font, first_u, 0, &first_glyph))
123 continue;
124 first_glyphs[num_first_glyphs].set (first_glyph);
125 ligature_per_first_glyph_count_list[num_first_glyphs] = 0;
126 first_glyphs_indirection[num_first_glyphs] = first_glyph_idx;
127 num_first_glyphs++;
128 }
129 hb_stable_sort (&first_glyphs[0], num_first_glyphs, OT::GlyphID::cmp, &first_glyphs_indirection[0]);
130
131 /* Now that the first-glyphs are sorted, walk again, populate ligatures. */
132 for (unsigned int i = 0; i < num_first_glyphs; i++)
133 {
134 unsigned int first_glyph_idx = first_glyphs_indirection[i];
135
136 for (unsigned int second_glyph_idx = 0; second_glyph_idx < ARRAY_LENGTH (ligature_table[0].ligatures); second_glyph_idx++)
137 {
138 hb_codepoint_t second_u = ligature_table[first_glyph_idx].ligatures[second_glyph_idx].second;
139 hb_codepoint_t ligature_u = ligature_table[first_glyph_idx].ligatures[second_glyph_idx].ligature;
140 hb_codepoint_t second_glyph, ligature_glyph;
141 if (!second_u ||
142 !hb_font_get_glyph (font, second_u, 0, &second_glyph) ||
143 !hb_font_get_glyph (font, ligature_u, 0, &ligature_glyph))
144 continue;
145
146 ligature_per_first_glyph_count_list[i]++;
147
148 ligature_list[num_ligatures].set (ligature_glyph);
149 component_count_list[num_ligatures] = 2;
|
60 hb_codepoint_t u_glyph, s_glyph;
61
62 if (!s ||
63 !hb_font_get_glyph (font, u, 0, &u_glyph) ||
64 !hb_font_get_glyph (font, s, 0, &s_glyph) ||
65 u_glyph == s_glyph ||
66 u_glyph > 0xFFFFu || s_glyph > 0xFFFFu)
67 continue;
68
69 glyphs[num_glyphs].set (u_glyph);
70 substitutes[num_glyphs].set (s_glyph);
71
72 num_glyphs++;
73 }
74
75 if (!num_glyphs)
76 return nullptr;
77
78 /* Bubble-sort or something equally good!
79 * May not be good-enough for presidential candidate interviews, but good-enough for us... */
80 hb_stable_sort (&glyphs[0], num_glyphs, OT::GlyphID::cmphelper, &substitutes[0]);
81
82 OT::Supplier<OT::GlyphID> glyphs_supplier (glyphs, num_glyphs);
83 OT::Supplier<OT::GlyphID> substitutes_supplier (substitutes, num_glyphs);
84
85 /* Each glyph takes four bytes max, and there's some overhead. */
86 char buf[(SHAPING_TABLE_LAST - SHAPING_TABLE_FIRST + 1) * 4 + 128];
87 OT::hb_serialize_context_t c (buf, sizeof (buf));
88 OT::SubstLookup *lookup = c.start_serialize<OT::SubstLookup> ();
89 bool ret = lookup->serialize_single (&c,
90 OT::LookupFlag::IgnoreMarks,
91 glyphs_supplier,
92 substitutes_supplier,
93 num_glyphs);
94 c.end_serialize ();
95 /* TODO sanitize the results? */
96
97 return ret ? c.copy<OT::SubstLookup> () : nullptr;
98 }
99
100 static OT::SubstLookup *
109 /* We know that all our ligatures are 2-component */
110 OT::GlyphID ligature_list[ARRAY_LENGTH_CONST (first_glyphs) * ARRAY_LENGTH_CONST(ligature_table[0].ligatures)];
111 unsigned int component_count_list[ARRAY_LENGTH_CONST (ligature_list)];
112 OT::GlyphID component_list[ARRAY_LENGTH_CONST (ligature_list) * 1/* One extra component per ligature */];
113 unsigned int num_ligatures = 0;
114
115 /* Populate arrays */
116
117 /* Sort out the first-glyphs */
118 for (unsigned int first_glyph_idx = 0; first_glyph_idx < ARRAY_LENGTH (first_glyphs); first_glyph_idx++)
119 {
120 hb_codepoint_t first_u = ligature_table[first_glyph_idx].first;
121 hb_codepoint_t first_glyph;
122 if (!hb_font_get_glyph (font, first_u, 0, &first_glyph))
123 continue;
124 first_glyphs[num_first_glyphs].set (first_glyph);
125 ligature_per_first_glyph_count_list[num_first_glyphs] = 0;
126 first_glyphs_indirection[num_first_glyphs] = first_glyph_idx;
127 num_first_glyphs++;
128 }
129 hb_stable_sort (&first_glyphs[0], num_first_glyphs, OT::GlyphID::cmphelper, &first_glyphs_indirection[0]);
130
131 /* Now that the first-glyphs are sorted, walk again, populate ligatures. */
132 for (unsigned int i = 0; i < num_first_glyphs; i++)
133 {
134 unsigned int first_glyph_idx = first_glyphs_indirection[i];
135
136 for (unsigned int second_glyph_idx = 0; second_glyph_idx < ARRAY_LENGTH (ligature_table[0].ligatures); second_glyph_idx++)
137 {
138 hb_codepoint_t second_u = ligature_table[first_glyph_idx].ligatures[second_glyph_idx].second;
139 hb_codepoint_t ligature_u = ligature_table[first_glyph_idx].ligatures[second_glyph_idx].ligature;
140 hb_codepoint_t second_glyph, ligature_glyph;
141 if (!second_u ||
142 !hb_font_get_glyph (font, second_u, 0, &second_glyph) ||
143 !hb_font_get_glyph (font, ligature_u, 0, &ligature_glyph))
144 continue;
145
146 ligature_per_first_glyph_count_list[i]++;
147
148 ligature_list[num_ligatures].set (ligature_glyph);
149 component_count_list[num_ligatures] = 2;
|