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diff --git a/thirdparty/harfbuzz/src/hb-ot-shape-complex-khmer.cc b/thirdparty/harfbuzz/src/hb-ot-shape-complex-khmer.cc
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--- a/thirdparty/harfbuzz/src/hb-ot-shape-complex-khmer.cc
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@@ -1,370 +0,0 @@
-/*
- * Copyright © 2011,2012 Google, Inc.
- *
- * 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.
- *
- * Google Author(s): Behdad Esfahbod
- */
-
-#include "hb.hh"
-
-#ifndef HB_NO_OT_SHAPE
-
-#include "hb-ot-shape-complex-khmer.hh"
-#include "hb-ot-shape-complex-khmer-machine.hh"
-#include "hb-ot-layout.hh"
-
-
-/*
- * Khmer shaper.
- */
-
-static const hb_ot_map_feature_t
-khmer_features[] =
-{
- /*
- * Basic features.
- * These features are applied all at once, before reordering, constrained
- * to the syllable.
- */
- {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('p','s','t','f'), F_MANUAL_JOINERS},
- {HB_TAG('c','f','a','r'), F_MANUAL_JOINERS},
- /*
- * Other features.
- * These features are applied all at once after clearing syllables.
- */
- {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},
-};
-
-/*
- * Must be in the same order as the khmer_features array.
- */
-enum {
- KHMER_PREF,
- KHMER_BLWF,
- KHMER_ABVF,
- KHMER_PSTF,
- KHMER_CFAR,
-
- _KHMER_PRES,
- _KHMER_ABVS,
- _KHMER_BLWS,
- _KHMER_PSTS,
-
- KHMER_NUM_FEATURES,
- KHMER_BASIC_FEATURES = _KHMER_PRES, /* Don't forget to update this! */
-};
-
-static void
-setup_syllables_khmer (const hb_ot_shape_plan_t *plan,
- hb_font_t *font,
- hb_buffer_t *buffer);
-static void
-reorder_khmer (const hb_ot_shape_plan_t *plan,
- hb_font_t *font,
- hb_buffer_t *buffer);
-
-static void
-collect_features_khmer (hb_ot_shape_planner_t *plan)
-{
- hb_ot_map_builder_t *map = &plan->map;
-
- /* Do this before any lookups have been applied. */
- map->add_gsub_pause (setup_syllables_khmer);
- map->add_gsub_pause (reorder_khmer);
-
- /* Testing suggests that Uniscribe does NOT pause between basic
- * features. Test with KhmerUI.ttf and the following three
- * sequences:
- *
- * U+1789,U+17BC
- * U+1789,U+17D2,U+1789
- * U+1789,U+17D2,U+1789,U+17BC
- *
- * https://github.com/harfbuzz/harfbuzz/issues/974
- */
- map->enable_feature (HB_TAG('l','o','c','l'));
- map->enable_feature (HB_TAG('c','c','m','p'));
-
- unsigned int i = 0;
- for (; i < KHMER_BASIC_FEATURES; i++)
- map->add_feature (khmer_features[i]);
-
- map->add_gsub_pause (_hb_clear_syllables);
-
- for (; i < KHMER_NUM_FEATURES; i++)
- map->add_feature (khmer_features[i]);
-}
-
-static void
-override_features_khmer (hb_ot_shape_planner_t *plan)
-{
- hb_ot_map_builder_t *map = &plan->map;
-
- /* Khmer spec has 'clig' as part of required shaping features:
- * "Apply feature 'clig' to form ligatures that are desired for
- * typographical correctness.", hence in overrides... */
- map->enable_feature (HB_TAG('c','l','i','g'));
-
- /* Uniscribe does not apply 'kern' in Khmer. */
- if (hb_options ().uniscribe_bug_compatible)
- {
- map->disable_feature (HB_TAG('k','e','r','n'));
- }
-
- map->disable_feature (HB_TAG('l','i','g','a'));
-}
-
-
-struct khmer_shape_plan_t
-{
- hb_mask_t mask_array[KHMER_NUM_FEATURES];
-};
-
-static void *
-data_create_khmer (const hb_ot_shape_plan_t *plan)
-{
- khmer_shape_plan_t *khmer_plan = (khmer_shape_plan_t *) hb_calloc (1, sizeof (khmer_shape_plan_t));
- if (unlikely (!khmer_plan))
- return nullptr;
-
- for (unsigned int i = 0; i < ARRAY_LENGTH (khmer_plan->mask_array); i++)
- khmer_plan->mask_array[i] = (khmer_features[i].flags & F_GLOBAL) ?
- 0 : plan->map.get_1_mask (khmer_features[i].tag);
-
- return khmer_plan;
-}
-
-static void
-data_destroy_khmer (void *data)
-{
- hb_free (data);
-}
-
-static void
-setup_masks_khmer (const hb_ot_shape_plan_t *plan HB_UNUSED,
- hb_buffer_t *buffer,
- hb_font_t *font HB_UNUSED)
-{
- HB_BUFFER_ALLOCATE_VAR (buffer, khmer_category);
-
- /* We cannot setup masks here. We save information about characters
- * and setup masks later on in a pause-callback. */
-
- unsigned int count = buffer->len;
- hb_glyph_info_t *info = buffer->info;
- for (unsigned int i = 0; i < count; i++)
- set_khmer_properties (info[i]);
-}
-
-static void
-setup_syllables_khmer (const hb_ot_shape_plan_t *plan HB_UNUSED,
- hb_font_t *font HB_UNUSED,
- hb_buffer_t *buffer)
-{
- find_syllables_khmer (buffer);
- foreach_syllable (buffer, start, end)
- buffer->unsafe_to_break (start, end);
-}
-
-
-/* Rules from:
- * https://docs.microsoft.com/en-us/typography/script-development/devanagari */
-
-static void
-reorder_consonant_syllable (const hb_ot_shape_plan_t *plan,
- hb_face_t *face HB_UNUSED,
- hb_buffer_t *buffer,
- unsigned int start, unsigned int end)
-{
- const khmer_shape_plan_t *khmer_plan = (const khmer_shape_plan_t *) plan->data;
- hb_glyph_info_t *info = buffer->info;
-
- /* Setup masks. */
- {
- /* Post-base */
- hb_mask_t mask = khmer_plan->mask_array[KHMER_BLWF] |
- khmer_plan->mask_array[KHMER_ABVF] |
- khmer_plan->mask_array[KHMER_PSTF];
- for (unsigned int i = start + 1; i < end; i++)
- info[i].mask |= mask;
- }
-
- unsigned int num_coengs = 0;
- for (unsigned int i = start + 1; i < end; i++)
- {
- /* """
- * When a COENG + (Cons | IndV) combination are found (and subscript count
- * is less than two) the character combination is handled according to the
- * subscript type of the character following the COENG.
- *
- * ...
- *
- * Subscript Type 2 - The COENG + RO characters are reordered to immediately
- * before the base glyph. Then the COENG + RO characters are assigned to have
- * the 'pref' OpenType feature applied to them.
- * """
- */
- if (info[i].khmer_category() == OT_Coeng && num_coengs <= 2 && i + 1 < end)
- {
- num_coengs++;
-
- if (info[i + 1].khmer_category() == OT_Ra)
- {
- for (unsigned int j = 0; j < 2; j++)
- info[i + j].mask |= khmer_plan->mask_array[KHMER_PREF];
-
- /* Move the Coeng,Ro sequence to the start. */
- buffer->merge_clusters (start, i + 2);
- hb_glyph_info_t t0 = info[i];
- hb_glyph_info_t t1 = info[i + 1];
- memmove (&info[start + 2], &info[start], (i - start) * sizeof (info[0]));
- info[start] = t0;
- info[start + 1] = t1;
-
- /* Mark the subsequent stuff with 'cfar'. Used in Khmer.
- * Read the feature spec.
- * This allows distinguishing the following cases with MS Khmer fonts:
- * U+1784,U+17D2,U+179A,U+17D2,U+1782
- * U+1784,U+17D2,U+1782,U+17D2,U+179A
- */
- if (khmer_plan->mask_array[KHMER_CFAR])
- for (unsigned int j = i + 2; j < end; j++)
- info[j].mask |= khmer_plan->mask_array[KHMER_CFAR];
-
- num_coengs = 2; /* Done. */
- }
- }
-
- /* Reorder left matra piece. */
- else if (info[i].khmer_category() == OT_VPre)
- {
- /* Move to the start. */
- buffer->merge_clusters (start, i + 1);
- hb_glyph_info_t t = info[i];
- memmove (&info[start + 1], &info[start], (i - start) * sizeof (info[0]));
- info[start] = t;
- }
- }
-}
-
-static void
-reorder_syllable_khmer (const hb_ot_shape_plan_t *plan,
- hb_face_t *face,
- hb_buffer_t *buffer,
- unsigned int start, unsigned int end)
-{
- khmer_syllable_type_t syllable_type = (khmer_syllable_type_t) (buffer->info[start].syllable() & 0x0F);
- switch (syllable_type)
- {
- case khmer_broken_cluster: /* We already inserted dotted-circles, so just call the consonant_syllable. */
- case khmer_consonant_syllable:
- reorder_consonant_syllable (plan, face, buffer, start, end);
- break;
-
- case khmer_non_khmer_cluster:
- break;
- }
-}
-
-static void
-reorder_khmer (const hb_ot_shape_plan_t *plan,
- hb_font_t *font,
- hb_buffer_t *buffer)
-{
- if (buffer->message (font, "start reordering khmer"))
- {
- hb_syllabic_insert_dotted_circles (font, buffer,
- khmer_broken_cluster,
- OT_DOTTEDCIRCLE,
- OT_Repha);
-
- foreach_syllable (buffer, start, end)
- reorder_syllable_khmer (plan, font->face, buffer, start, end);
- (void) buffer->message (font, "end reordering khmer");
- }
- HB_BUFFER_DEALLOCATE_VAR (buffer, khmer_category);
-}
-
-
-static bool
-decompose_khmer (const hb_ot_shape_normalize_context_t *c,
- hb_codepoint_t ab,
- hb_codepoint_t *a,
- hb_codepoint_t *b)
-{
- switch (ab)
- {
- /*
- * Decompose split matras that don't have Unicode decompositions.
- */
-
- /* Khmer */
- case 0x17BEu : *a = 0x17C1u; *b= 0x17BEu; return true;
- case 0x17BFu : *a = 0x17C1u; *b= 0x17BFu; return true;
- case 0x17C0u : *a = 0x17C1u; *b= 0x17C0u; return true;
- case 0x17C4u : *a = 0x17C1u; *b= 0x17C4u; return true;
- case 0x17C5u : *a = 0x17C1u; *b= 0x17C5u; return true;
- }
-
- return (bool) c->unicode->decompose (ab, a, b);
-}
-
-static bool
-compose_khmer (const hb_ot_shape_normalize_context_t *c,
- hb_codepoint_t a,
- hb_codepoint_t b,
- hb_codepoint_t *ab)
-{
- /* Avoid recomposing split matras. */
- if (HB_UNICODE_GENERAL_CATEGORY_IS_MARK (c->unicode->general_category (a)))
- return false;
-
- return (bool) c->unicode->compose (a, b, ab);
-}
-
-
-const hb_ot_complex_shaper_t _hb_ot_complex_shaper_khmer =
-{
- collect_features_khmer,
- override_features_khmer,
- data_create_khmer,
- data_destroy_khmer,
- nullptr, /* preprocess_text */
- nullptr, /* postprocess_glyphs */
- HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS_NO_SHORT_CIRCUIT,
- decompose_khmer,
- compose_khmer,
- setup_masks_khmer,
- HB_TAG_NONE, /* gpos_tag */
- nullptr, /* reorder_marks */
- HB_OT_SHAPE_ZERO_WIDTH_MARKS_NONE,
- false, /* fallback_position */
-};
-
-
-#endif
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