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-rw-r--r--Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-shape-complex-indic.cc357
1 files changed, 316 insertions, 41 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-shape-complex-indic.cc b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-shape-complex-indic.cc
index d4541bb18ab..f1ae303adcc 100644
--- a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-shape-complex-indic.cc
+++ b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-shape-complex-indic.cc
@@ -95,42 +95,40 @@ static const indic_config_t indic_configs[] =
* Indic shaper.
*/
-struct feature_list_t {
- hb_tag_t tag;
- hb_ot_map_feature_flags_t flags;
-};
-
-static const feature_list_t
+static const hb_ot_map_feature_t
indic_features[] =
{
/*
* Basic features.
* These features are applied in order, one at a time, after initial_reordering.
*/
- {HB_TAG('n','u','k','t'), F_GLOBAL},
- {HB_TAG('a','k','h','n'), F_GLOBAL},
- {HB_TAG('r','p','h','f'), F_NONE},
- {HB_TAG('r','k','r','f'), F_GLOBAL},
- {HB_TAG('p','r','e','f'), F_NONE},
- {HB_TAG('b','l','w','f'), F_NONE},
- {HB_TAG('a','b','v','f'), F_NONE},
- {HB_TAG('h','a','l','f'), F_NONE},
- {HB_TAG('p','s','t','f'), F_NONE},
- {HB_TAG('v','a','t','u'), F_GLOBAL},
- {HB_TAG('c','j','c','t'), F_GLOBAL},
+ {HB_TAG('n','u','k','t'), F_GLOBAL_MANUAL_JOINERS},
+ {HB_TAG('a','k','h','n'), F_GLOBAL_MANUAL_JOINERS},
+ {HB_TAG('r','p','h','f'), F_MANUAL_JOINERS},
+ {HB_TAG('r','k','r','f'), F_GLOBAL_MANUAL_JOINERS},
+ {HB_TAG('p','r','e','f'), F_MANUAL_JOINERS},
+ {HB_TAG('b','l','w','f'), F_MANUAL_JOINERS},
+ {HB_TAG('a','b','v','f'), F_MANUAL_JOINERS},
+ {HB_TAG('h','a','l','f'), F_MANUAL_JOINERS},
+ {HB_TAG('p','s','t','f'), F_MANUAL_JOINERS},
+ {HB_TAG('v','a','t','u'), F_GLOBAL_MANUAL_JOINERS},
+ {HB_TAG('c','j','c','t'), F_GLOBAL_MANUAL_JOINERS},
/*
* Other features.
* These features are applied all at once, after final_reordering.
* Default Bengali font in Windows for example has intermixed
* lookups for init,pres,abvs,blws features.
*/
- {HB_TAG('i','n','i','t'), F_NONE},
- {HB_TAG('p','r','e','s'), F_GLOBAL},
- {HB_TAG('a','b','v','s'), F_GLOBAL},
- {HB_TAG('b','l','w','s'), F_GLOBAL},
- {HB_TAG('p','s','t','s'), F_GLOBAL},
- {HB_TAG('h','a','l','n'), F_GLOBAL},
- /* Positioning features, though we don't care about the types. */
+ {HB_TAG('i','n','i','t'), F_MANUAL_JOINERS},
+ {HB_TAG('p','r','e','s'), F_GLOBAL_MANUAL_JOINERS},
+ {HB_TAG('a','b','v','s'), F_GLOBAL_MANUAL_JOINERS},
+ {HB_TAG('b','l','w','s'), F_GLOBAL_MANUAL_JOINERS},
+ {HB_TAG('p','s','t','s'), F_GLOBAL_MANUAL_JOINERS},
+ {HB_TAG('h','a','l','n'), F_GLOBAL_MANUAL_JOINERS},
+ /*
+ * Positioning features.
+ * We don't care about the types.
+ */
{HB_TAG('d','i','s','t'), F_GLOBAL},
{HB_TAG('a','b','v','m'), F_GLOBAL},
{HB_TAG('b','l','w','m'), F_GLOBAL},
@@ -158,12 +156,13 @@ enum {
_BLWS,
_PSTS,
_HALN,
+
_DIST,
_ABVM,
_BLWM,
INDIC_NUM_FEATURES,
- INDIC_BASIC_FEATURES = INIT /* Don't forget to update this! */
+ INDIC_BASIC_FEATURES = INIT, /* Don't forget to update this! */
};
static void
@@ -191,25 +190,27 @@ collect_features_indic (hb_ot_shape_planner_t *plan)
/* Do this before any lookups have been applied. */
map->add_gsub_pause (setup_syllables);
- map->add_global_bool_feature (HB_TAG('l','o','c','l'));
+ map->enable_feature (HB_TAG('l','o','c','l'));
/* The Indic specs do not require ccmp, but we apply it here since if
* there is a use of it, it's typically at the beginning. */
- map->add_global_bool_feature (HB_TAG('c','c','m','p'));
+ map->enable_feature (HB_TAG('c','c','m','p'));
unsigned int i = 0;
map->add_gsub_pause (initial_reordering);
+
for (; i < INDIC_BASIC_FEATURES; i++) {
- map->add_feature (indic_features[i].tag, 1, indic_features[i].flags | F_MANUAL_ZWJ | F_MANUAL_ZWNJ);
+ map->add_feature (indic_features[i]);
map->add_gsub_pause (nullptr);
}
+
map->add_gsub_pause (final_reordering);
- for (; i < INDIC_NUM_FEATURES; i++) {
- map->add_feature (indic_features[i].tag, 1, indic_features[i].flags | F_MANUAL_ZWJ | F_MANUAL_ZWNJ);
- }
- map->add_global_bool_feature (HB_TAG('c','a','l','t'));
- map->add_global_bool_feature (HB_TAG('c','l','i','g'));
+ for (; i < INDIC_NUM_FEATURES; i++)
+ map->add_feature (indic_features[i]);
+
+ map->enable_feature (HB_TAG('c','a','l','t'));
+ map->enable_feature (HB_TAG('c','l','i','g'));
map->add_gsub_pause (clear_syllables);
}
@@ -217,7 +218,7 @@ collect_features_indic (hb_ot_shape_planner_t *plan)
static void
override_features_indic (hb_ot_shape_planner_t *plan)
{
- plan->map.add_feature (HB_TAG('l','i','g','a'), 0, F_GLOBAL);
+ plan->map.disable_feature (HB_TAG('l','i','g','a'));
}
@@ -273,6 +274,7 @@ struct indic_shape_plan_t
const indic_config_t *config;
bool is_old_spec;
+ bool uniscribe_bug_compatible;
mutable hb_atomic_int_t virama_glyph;
would_substitute_feature_t rphf;
@@ -298,6 +300,7 @@ data_create_indic (const hb_ot_shape_plan_t *plan)
}
indic_plan->is_old_spec = indic_plan->config->has_old_spec && ((plan->map.chosen_script[0] & 0x000000FFu) != '2');
+ indic_plan->uniscribe_bug_compatible = hb_options ().uniscribe_bug_compatible;
indic_plan->virama_glyph.set_relaxed (-1);
/* Use zero-context would_substitute() matching for new-spec of the main
@@ -328,6 +331,275 @@ data_destroy_indic (void *data)
free (data);
}
+static void
+_output_with_dotted_circle (hb_buffer_t *buffer)
+{
+ hb_glyph_info_t &dottedcircle = buffer->output_glyph (0x25CCu);
+ _hb_glyph_info_reset_continuation (&dottedcircle);
+
+ buffer->next_glyph ();
+}
+
+static void
+preprocess_text_indic (const hb_ot_shape_plan_t *plan,
+ hb_buffer_t *buffer,
+ hb_font_t *font)
+{
+ /* UGLY UGLY UGLY business of adding dotted-circle in the middle of
+ * vowel-sequences that look like another vowel. Data for each script
+ * collected from Unicode 11 book, tables named "Vowel Letters" with
+ * "Use" and "Do Not Use" columns.
+ *
+ * https://github.com/harfbuzz/harfbuzz/issues/1019
+ */
+ bool processed = false;
+ buffer->clear_output ();
+ unsigned int count = buffer->len;
+ switch ((unsigned) buffer->props.script)
+ {
+ case HB_SCRIPT_DEVANAGARI:
+ for (buffer->idx = 0; buffer->idx + 1 < count && buffer->successful;)
+ {
+ bool matched = false;
+ switch (buffer->cur().codepoint)
+ {
+ case 0x0905u:
+ switch (buffer->cur(1).codepoint)
+ {
+ case 0x093Au: case 0x093Bu: case 0x093Eu: case 0x0945u:
+ case 0x0946u: case 0x0949u: case 0x094Au: case 0x094Bu:
+ case 0x094Cu: case 0x094Fu: case 0x0956u: case 0x0957u:
+ matched = true;
+ break;
+ }
+ break;
+ case 0x0906u:
+ switch (buffer->cur(1).codepoint)
+ {
+ case 0x093Au: case 0x0945u: case 0x0946u: case 0x0947u:
+ case 0x0948u:
+ matched = true;
+ break;
+ }
+ break;
+ case 0x0909u:
+ switch (buffer->cur(1).codepoint)
+ {
+ case 0x0941u:
+ matched = true;
+ break;
+ }
+ break;
+ case 0x090Fu:
+ switch (buffer->cur(1).codepoint)
+ {
+ case 0x0945u: case 0x0946u: case 0x0947u:
+ matched = true;
+ break;
+ }
+ break;
+ case 0x0930u:
+ if (0x094Du == buffer->cur(1).codepoint &&
+ buffer->idx + 2 < count &&
+ 0x0907u == buffer->cur(2).codepoint)
+ {
+ buffer->next_glyph ();
+ buffer->next_glyph ();
+ buffer->output_glyph (0x25CCu);
+ }
+ break;
+ }
+ buffer->next_glyph ();
+ if (matched) _output_with_dotted_circle (buffer);
+ }
+ processed = true;
+ break;
+
+ case HB_SCRIPT_BENGALI:
+ for (buffer->idx = 0; buffer->idx + 1 < count && buffer->successful;)
+ {
+ bool matched = false;
+ switch (buffer->cur().codepoint)
+ {
+ case 0x0985u:
+ matched = 0x09BE == buffer->cur(1).codepoint;
+ break;
+ case 0x098Bu:
+ matched = 0x09C3 == buffer->cur(1).codepoint;
+ break;
+ case 0x098Cu:
+ matched = 0x09E2 == buffer->cur(1).codepoint;
+ break;
+ }
+ buffer->next_glyph ();
+ if (matched) _output_with_dotted_circle (buffer);
+ }
+ processed = true;
+ break;
+
+ case HB_SCRIPT_GURMUKHI:
+ for (buffer->idx = 0; buffer->idx + 1 < count && buffer->successful;)
+ {
+ bool matched = false;
+ switch (buffer->cur().codepoint)
+ {
+ case 0x0A05u:
+ switch (buffer->cur(1).codepoint)
+ {
+ case 0x0A3Eu: case 0x0A48u: case 0x0A4Cu:
+ matched = true;
+ break;
+ }
+ break;
+ case 0x0A72u:
+ switch (buffer->cur(1).codepoint)
+ {
+ case 0x0A3Fu: case 0x0A40u: case 0x0A47u:
+ matched = true;
+ break;
+ }
+ break;
+ case 0x0A73u:
+ switch (buffer->cur(1).codepoint)
+ {
+ case 0x0A41u: case 0x0A42u: case 0x0A4Bu:
+ matched = true;
+ break;
+ }
+ break;
+ }
+ buffer->next_glyph ();
+ if (matched) _output_with_dotted_circle (buffer);
+ }
+ processed = true;
+ break;
+
+ case HB_SCRIPT_GUJARATI:
+ for (buffer->idx = 0; buffer->idx + 1 < count && buffer->successful;)
+ {
+ bool matched = false;
+ switch (buffer->cur().codepoint)
+ {
+ case 0x0A85u:
+ switch (buffer->cur(1).codepoint)
+ {
+ case 0x0ABEu: case 0x0AC5u: case 0x0AC7u: case 0x0AC8u:
+ case 0x0AC9u: case 0x0ACBu: case 0x0ACCu:
+ matched = true;
+ break;
+ }
+ break;
+ case 0x0AC5u:
+ matched = 0x0ABE == buffer->cur(1).codepoint;
+ break;
+ }
+ buffer->next_glyph ();
+ if (matched) _output_with_dotted_circle (buffer);
+ }
+ processed = true;
+ break;
+
+ case HB_SCRIPT_ORIYA:
+ for (buffer->idx = 0; buffer->idx + 1 < count && buffer->successful;)
+ {
+ bool matched = false;
+ switch (buffer->cur().codepoint)
+ {
+ case 0x0B05u:
+ matched = 0x0B3E == buffer->cur(1).codepoint;
+ break;
+ case 0x0B0Fu: case 0x0B13u:
+ matched = 0x0B57 == buffer->cur(1).codepoint;
+ break;
+ }
+ buffer->next_glyph ();
+ if (matched) _output_with_dotted_circle (buffer);
+ }
+ processed = true;
+ break;
+
+ case HB_SCRIPT_TELUGU:
+ for (buffer->idx = 0; buffer->idx + 1 < count && buffer->successful;)
+ {
+ bool matched = false;
+ switch (buffer->cur().codepoint)
+ {
+ case 0x0C12u:
+ switch (buffer->cur(1).codepoint)
+ {
+ case 0x0C4Cu: case 0x0C55u:
+ matched = true;
+ break;
+ }
+ break;
+ case 0x0C3Fu: case 0x0C46u: case 0xC4Au:
+ matched = 0x0C55 == buffer->cur(1).codepoint;
+ break;
+ }
+ buffer->next_glyph ();
+ if (matched) _output_with_dotted_circle (buffer);
+ }
+ processed = true;
+ break;
+
+ case HB_SCRIPT_KANNADA:
+ for (buffer->idx = 0; buffer->idx + 1 < count && buffer->successful;)
+ {
+ bool matched = false;
+ switch (buffer->cur().codepoint)
+ {
+ case 0x0C89u: case 0x0C8Bu:
+ matched = 0x0CBE == buffer->cur(1).codepoint;
+ break;
+ case 0x0C92u:
+ matched = 0x0CCC == buffer->cur(1).codepoint;
+ break;
+ }
+ buffer->next_glyph ();
+ if (matched) _output_with_dotted_circle (buffer);
+ }
+ processed = true;
+ break;
+
+ case HB_SCRIPT_MALAYALAM:
+ for (buffer->idx = 0; buffer->idx + 1 < count && buffer->successful;)
+ {
+ bool matched = false;
+ switch (buffer->cur().codepoint)
+ {
+ case 0x0D07u: case 0x0D09u:
+ matched = 0x0D57 == buffer->cur(1).codepoint;
+ break;
+ case 0x0D0Eu:
+ matched = 0x0D46 == buffer->cur(1).codepoint;
+ break;
+ case 0x0D12u:
+ switch (buffer->cur(1).codepoint)
+ {
+ case 0x0D3Eu: case 0x0D57u:
+ matched = true;
+ break;
+ }
+ break;
+ }
+ buffer->next_glyph ();
+ if (matched) _output_with_dotted_circle (buffer);
+ }
+ processed = true;
+ break;
+
+ default:
+ break;
+ }
+ if (processed)
+ {
+ if (buffer->idx < count)
+ buffer->next_glyph ();
+ if (likely (buffer->successful))
+ buffer->swap_buffers ();
+ }
+}
+
static indic_position_t
consonant_position_from_face (const indic_shape_plan_t *indic_plan,
const hb_codepoint_t consonant,
@@ -717,7 +989,7 @@ initial_reordering_consonant_syllable (const hb_ot_shape_plan_t *plan,
indic_position_t last_pos = POS_START;
for (unsigned int i = start; i < end; i++)
{
- if ((FLAG_UNSAFE (info[i].indic_category()) & (JOINER_FLAGS | FLAG (OT_N) | FLAG (OT_RS) | MEDIAL_FLAGS | FLAG (OT_H))))
+ if ((FLAG_UNSAFE (info[i].indic_category()) & (JOINER_FLAGS | FLAG (OT_N) | FLAG (OT_RS) | FLAG (OT_H))))
{
info[i].indic_position() = last_pos;
if (unlikely (info[i].indic_category() == OT_H &&
@@ -913,10 +1185,12 @@ initial_reordering_standalone_cluster (const hb_ot_shape_plan_t *plan,
hb_buffer_t *buffer,
unsigned int start, unsigned int end)
{
+ const indic_shape_plan_t *indic_plan = (const indic_shape_plan_t *) plan->data;
+
/* We treat placeholder/dotted-circle as if they are consonants, so we
* should just chain. Only if not in compatibility mode that is... */
- if (hb_options ().uniscribe_bug_compatible)
+ if (indic_plan->uniscribe_bug_compatible)
{
/* For dotted-circle, this is what Uniscribe does:
* If dotted-circle is the last glyph, it just does nothing.
@@ -958,7 +1232,8 @@ insert_dotted_circles (const hb_ot_shape_plan_t *plan HB_UNUSED,
hb_font_t *font,
hb_buffer_t *buffer)
{
- /* Note: This loop is extra overhead, but should not be measurable. */
+ /* 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;
@@ -1356,7 +1631,7 @@ final_reordering_syllable (const hb_ot_shape_plan_t *plan,
* Uniscribe doesn't do this.
* TEST: U+0930,U+094D,U+0915,U+094B,U+094D
*/
- if (!hb_options ().uniscribe_bug_compatible &&
+ if (!indic_plan->uniscribe_bug_compatible &&
unlikely (is_halant (info[new_reph_pos]))) {
for (unsigned int i = base + 1; i < new_reph_pos; i++)
if (info[i].indic_category() == OT_M) {
@@ -1462,7 +1737,7 @@ final_reordering_syllable (const hb_ot_shape_plan_t *plan,
/*
* Finish off the clusters and go home!
*/
- if (hb_options ().uniscribe_bug_compatible)
+ if (indic_plan->uniscribe_bug_compatible)
{
switch ((hb_tag_t) plan->props.script)
{
@@ -1609,13 +1884,13 @@ const hb_ot_complex_shaper_t _hb_ot_complex_shaper_indic =
override_features_indic,
data_create_indic,
data_destroy_indic,
- nullptr, /* preprocess_text */
+ preprocess_text_indic,
nullptr, /* postprocess_glyphs */
HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS_NO_SHORT_CIRCUIT,
decompose_indic,
compose_indic,
setup_masks_indic,
- nullptr, /* disable_otl */
+ HB_TAG_NONE, /* gpos_tag */
nullptr, /* reorder_marks */
HB_OT_SHAPE_ZERO_WIDTH_MARKS_NONE,
false, /* fallback_position */