[Indic] Move more repeated work into shape_plan
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@ -210,12 +210,50 @@ struct indic_shape_plan_t
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pref (&plan->map, HB_TAG('p','r','e','f')),
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blwf (&plan->map, HB_TAG('b','l','w','f')),
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pstf (&plan->map, HB_TAG('p','s','t','f')),
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is_old_spec (IS_OLD_INDIC_TAG (plan->map.get_chosen_script (0))) {}
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is_old_spec (IS_OLD_INDIC_TAG (plan->map.get_chosen_script (0))),
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virama_glyph ((hb_codepoint_t) -1)
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{
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switch ((int) plan->props.script) {
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case HB_SCRIPT_DEVANAGARI:virama = 0x094D; break;
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case HB_SCRIPT_BENGALI: virama = 0x09CD; break;
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case HB_SCRIPT_GURMUKHI: virama = 0x0A4D; break;
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case HB_SCRIPT_GUJARATI: virama = 0x0ACD; break;
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case HB_SCRIPT_ORIYA: virama = 0x0B4D; break;
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case HB_SCRIPT_TAMIL: virama = 0x0BCD; break;
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case HB_SCRIPT_TELUGU: virama = 0x0C4D; break;
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case HB_SCRIPT_KANNADA: virama = 0x0CCD; break;
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case HB_SCRIPT_MALAYALAM: virama = 0x0D4D; break;
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case HB_SCRIPT_SINHALA: virama = 0x0DCA; break;
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case HB_SCRIPT_KHMER: virama = 0x17D2; break;
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default: virama = 0; break;
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}
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}
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would_apply_feature_t pref;
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would_apply_feature_t blwf;
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would_apply_feature_t pstf;
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bool is_old_spec;
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hb_codepoint_t virama;
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hb_codepoint_t virama_glyph;
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inline bool get_virama_glyph (hb_font_t *font, hb_codepoint_t *pglyph) const
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{
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hb_codepoint_t glyph = virama_glyph;
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if (unlikely (virama_glyph == (hb_codepoint_t) -1))
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{
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if (!font->get_glyph (virama, 0, &glyph))
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glyph = 0;
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/* Technically speaking, the spec says we should apply 'locl' to virama too.
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* Maybe one day... */
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/* Our get_glyph() function needs a font, so we can't get the virama glyph
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* during shape planning... Instead, overwrite it here. It's safe. Don't worry! */
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(const_cast<indic_shape_plan_t *> (this))->virama_glyph = glyph;
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}
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*pglyph = glyph;
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return glyph != 0;
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}
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};
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static void *
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@ -282,30 +320,12 @@ update_consonant_positions (const hb_ot_shape_plan_t *plan,
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hb_buffer_t *buffer,
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hb_font_t *font)
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{
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hb_codepoint_t virama;
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switch ((int) buffer->props.script) {
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case HB_SCRIPT_DEVANAGARI: virama = 0x094D; break;
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case HB_SCRIPT_BENGALI: virama = 0x09CD; break;
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case HB_SCRIPT_GURMUKHI: virama = 0x0A4D; break;
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case HB_SCRIPT_GUJARATI: virama = 0x0ACD; break;
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case HB_SCRIPT_ORIYA: virama = 0x0B4D; break;
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case HB_SCRIPT_TAMIL: virama = 0x0BCD; break;
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case HB_SCRIPT_TELUGU: virama = 0x0C4D; break;
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case HB_SCRIPT_KANNADA: virama = 0x0CCD; break;
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case HB_SCRIPT_MALAYALAM: virama = 0x0D4D; break;
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case HB_SCRIPT_SINHALA: virama = 0x0DCA; break;
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case HB_SCRIPT_KHMER: virama = 0x17D2; break;
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default: virama = 0; break;
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}
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const indic_shape_plan_t *indic_plan = (const indic_shape_plan_t *) plan->data;
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unsigned int consonant_pos = indic_plan->is_old_spec ? 0 : 1;
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hb_codepoint_t glyphs[2];
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if (virama && font->get_glyph (virama, 0, &glyphs[1 - consonant_pos]))
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if (indic_plan->get_virama_glyph (font, &glyphs[1 - consonant_pos]))
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{
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/* Technically speaking, the spec says we should apply 'locl' to virama too.
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* Maybe one day... */
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hb_face_t *face = font->face;
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unsigned int count = buffer->len;
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for (unsigned int i = 0; i < count; i++)
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@ -324,6 +344,7 @@ static void
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initial_reordering_consonant_syllable (const hb_ot_shape_plan_t *plan, hb_buffer_t *buffer, hb_mask_t *basic_mask_array,
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unsigned int start, unsigned int end)
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{
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const indic_shape_plan_t *indic_plan = (const indic_shape_plan_t *) plan->data;
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hb_glyph_info_t *info = buffer->info;
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@ -526,7 +547,7 @@ initial_reordering_consonant_syllable (const hb_ot_shape_plan_t *plan, hb_buffer
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/* For old-style Indic script tags, move the first post-base Halant after
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* last consonant. */
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if (IS_OLD_INDIC_TAG (plan->map.get_chosen_script (0))) {
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if (indic_plan->is_old_spec) {
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for (unsigned int i = base + 1; i < end; i++)
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if (info[i].indic_category() == OT_H) {
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unsigned int j;
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