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-rw-r--r--gfx/harfbuzz/src/hb-ot-shaper-syllabic.cc112
1 files changed, 112 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-ot-shaper-syllabic.cc b/gfx/harfbuzz/src/hb-ot-shaper-syllabic.cc
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+++ b/gfx/harfbuzz/src/hb-ot-shaper-syllabic.cc
@@ -0,0 +1,112 @@
+/*
+ * 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-shaper-syllabic.hh"
+
+
+bool
+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 false;
+ if (likely (!(buffer->scratch_flags & HB_BUFFER_SCRATCH_FLAG_HAS_BROKEN_SYLLABLE)))
+ {
+ if (buffer->messaging ())
+ (void) buffer->message (font, "skipped inserting dotted-circles because there is no broken syllables");
+ return false;
+ }
+
+ if (buffer->messaging () &&
+ !buffer->message (font, "start inserting dotted-circles"))
+ return false;
+
+ hb_codepoint_t dottedcircle_glyph;
+ if (!font->get_nominal_glyph (0x25CCu, &dottedcircle_glyph))
+ return false;
+
+ hb_glyph_info_t dottedcircle = {0};
+ dottedcircle.codepoint = 0x25CCu;
+ dottedcircle.ot_shaper_var_u8_category() = dottedcircle_category;
+ if (dottedcircle_position != -1)
+ dottedcircle.ot_shaper_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().ot_shaper_var_u8_category() == (unsigned) repha_category)
+ (void) buffer->next_glyph ();
+ }
+
+ (void) buffer->output_info (ginfo);
+ }
+ else
+ (void) buffer->next_glyph ();
+ }
+ buffer->sync ();
+
+ if (buffer->messaging ())
+ (void) buffer->message (font, "end inserting dotted-circles");
+
+ return true;
+}
+
+HB_INTERNAL bool
+hb_syllabic_clear_var (const hb_ot_shape_plan_t *plan,
+ hb_font_t *font,
+ hb_buffer_t *buffer)
+{
+ HB_BUFFER_DEALLOCATE_VAR (buffer, syllable);
+ return false;
+}
+
+
+#endif