| /* |
| * Copyright © 2021 Behdad Esfahbod. |
| * |
| * This is part of HarfBuzz, a text shaping library. |
| * |
| * Permission is hereby granted, without written agreement and without |
| * license or royalty fees, to use, copy, modify, and distribute this |
| * software and its documentation for any purpose, provided that the |
| * above copyright notice and the following two paragraphs appear in |
| * all copies of this software. |
| * |
| * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
| * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
| * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
| * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
| * DAMAGE. |
| * |
| * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
| * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
| * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
| * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| */ |
| |
| #include "hb.hh" |
| |
| #ifndef HB_NO_OT_SHAPE |
| |
| #include "hb-ot-shape-complex-syllabic.hh" |
| |
| |
| void |
| hb_syllabic_insert_dotted_circles (hb_font_t *font, |
| hb_buffer_t *buffer, |
| unsigned int broken_syllable_type, |
| unsigned int dottedcircle_category, |
| int repha_category, |
| int dottedcircle_position) |
| { |
| if (unlikely (buffer->flags & HB_BUFFER_FLAG_DO_NOT_INSERT_DOTTED_CIRCLE)) |
| return; |
| |
| /* Note: This loop is extra overhead, but should not be measurable. |
| * TODO Use a buffer scratch flag to remove the loop. */ |
| bool has_broken_syllables = false; |
| unsigned int count = buffer->len; |
| hb_glyph_info_t *info = buffer->info; |
| for (unsigned int i = 0; i < count; i++) |
| if ((info[i].syllable() & 0x0F) == broken_syllable_type) |
| { |
| has_broken_syllables = true; |
| break; |
| } |
| if (likely (!has_broken_syllables)) |
| return; |
| |
| |
| hb_codepoint_t dottedcircle_glyph; |
| if (!font->get_nominal_glyph (0x25CCu, &dottedcircle_glyph)) |
| return; |
| |
| hb_glyph_info_t dottedcircle = {0}; |
| dottedcircle.codepoint = 0x25CCu; |
| dottedcircle.complex_var_u8_category() = dottedcircle_category; |
| if (dottedcircle_position != -1) |
| dottedcircle.complex_var_u8_auxiliary() = dottedcircle_position; |
| dottedcircle.codepoint = dottedcircle_glyph; |
| |
| buffer->clear_output (); |
| |
| buffer->idx = 0; |
| unsigned int last_syllable = 0; |
| while (buffer->idx < buffer->len && buffer->successful) |
| { |
| unsigned int syllable = buffer->cur().syllable(); |
| if (unlikely (last_syllable != syllable && (syllable & 0x0F) == broken_syllable_type)) |
| { |
| last_syllable = syllable; |
| |
| hb_glyph_info_t ginfo = dottedcircle; |
| ginfo.cluster = buffer->cur().cluster; |
| ginfo.mask = buffer->cur().mask; |
| ginfo.syllable() = buffer->cur().syllable(); |
| |
| /* Insert dottedcircle after possible Repha. */ |
| if (repha_category != -1) |
| { |
| while (buffer->idx < buffer->len && buffer->successful && |
| last_syllable == buffer->cur().syllable() && |
| buffer->cur().complex_var_u8_category() == (unsigned) repha_category) |
| (void) buffer->next_glyph (); |
| } |
| |
| (void) buffer->output_info (ginfo); |
| } |
| else |
| (void) buffer->next_glyph (); |
| } |
| buffer->swap_buffers (); |
| } |
| |
| |
| #endif |