/*************************************************************************/
/*  text_server_adv.cpp                                                  */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#include "text_server_adv.h"

#ifdef GDEXTENSION
// Headers for building as GDExtension plug-in.

#include <godot_cpp/classes/file.hpp>
#include <godot_cpp/classes/rendering_server.hpp>
#include <godot_cpp/classes/translation_server.hpp>
#include <godot_cpp/core/error_macros.hpp>

using namespace godot;

#else
// Headers for building as built-in module.

#include "core/core_bind.h"
#include "core/error/error_macros.h"
#include "core/string/print_string.h"
#include "core/string/translation.h"

#include "modules/modules_enabled.gen.h" // For freetype, msdfgen.

using namespace core_bind;

#endif

// Built-in ICU data.

#ifdef ICU_STATIC_DATA
#include "icudata.gen.h"
#endif

// Thirdparty headers.

#ifdef MODULE_MSDFGEN_ENABLED
#include "core/ShapeDistanceFinder.h"
#include "core/contour-combiners.h"
#include "core/edge-selectors.h"
#include "msdfgen.h"
#endif

/*************************************************************************/
/*  bmp_font_t HarfBuzz Bitmap font interface                            */
/*************************************************************************/

hb_font_funcs_t *TextServerAdvanced::funcs = nullptr;

TextServerAdvanced::bmp_font_t *TextServerAdvanced::_bmp_font_create(TextServerAdvanced::FontDataForSizeAdvanced *p_face, bool p_unref) {
	bmp_font_t *bm_font = memnew(bmp_font_t);

	if (!bm_font) {
		return nullptr;
	}

	bm_font->face = p_face;
	bm_font->unref = p_unref;

	return bm_font;
}

void TextServerAdvanced::_bmp_font_destroy(void *p_data) {
	bmp_font_t *bm_font = reinterpret_cast<bmp_font_t *>(p_data);
	memdelete(bm_font);
}

hb_bool_t TextServerAdvanced::_bmp_get_nominal_glyph(hb_font_t *p_font, void *p_font_data, hb_codepoint_t p_unicode, hb_codepoint_t *r_glyph, void *p_user_data) {
	const bmp_font_t *bm_font = reinterpret_cast<const bmp_font_t *>(p_font_data);

	if (!bm_font->face) {
		return false;
	}

	if (!bm_font->face->glyph_map.has(p_unicode)) {
		if (bm_font->face->glyph_map.has(0xf000u + p_unicode)) {
			*r_glyph = 0xf000u + p_unicode;
			return true;
		} else {
			return false;
		}
	}

	*r_glyph = p_unicode;
	return true;
}

hb_position_t TextServerAdvanced::_bmp_get_glyph_h_advance(hb_font_t *p_font, void *p_font_data, hb_codepoint_t p_glyph, void *p_user_data) {
	const bmp_font_t *bm_font = reinterpret_cast<const bmp_font_t *>(p_font_data);

	if (!bm_font->face) {
		return 0;
	}

	if (!bm_font->face->glyph_map.has(p_glyph)) {
		return 0;
	}

	return bm_font->face->glyph_map[p_glyph].advance.x * 64;
}

hb_position_t TextServerAdvanced::_bmp_get_glyph_v_advance(hb_font_t *p_font, void *p_font_data, hb_codepoint_t p_glyph, void *p_user_data) {
	const bmp_font_t *bm_font = reinterpret_cast<const bmp_font_t *>(p_font_data);

	if (!bm_font->face) {
		return 0;
	}

	if (!bm_font->face->glyph_map.has(p_glyph)) {
		return 0;
	}

	return -bm_font->face->glyph_map[p_glyph].advance.y * 64;
}

hb_position_t TextServerAdvanced::_bmp_get_glyph_h_kerning(hb_font_t *p_font, void *p_font_data, hb_codepoint_t p_left_glyph, hb_codepoint_t p_right_glyph, void *p_user_data) {
	const bmp_font_t *bm_font = reinterpret_cast<const bmp_font_t *>(p_font_data);

	if (!bm_font->face) {
		return 0;
	}

	if (!bm_font->face->kerning_map.has(Vector2i(p_left_glyph, p_right_glyph))) {
		return 0;
	}

	return bm_font->face->kerning_map[Vector2i(p_left_glyph, p_right_glyph)].x * 64;
}

hb_bool_t TextServerAdvanced::_bmp_get_glyph_v_origin(hb_font_t *p_font, void *p_font_data, hb_codepoint_t p_glyph, hb_position_t *r_x, hb_position_t *r_y, void *p_user_data) {
	const bmp_font_t *bm_font = reinterpret_cast<const bmp_font_t *>(p_font_data);

	if (!bm_font->face) {
		return false;
	}

	if (!bm_font->face->glyph_map.has(p_glyph)) {
		return false;
	}

	*r_x = bm_font->face->glyph_map[p_glyph].advance.x * 32;
	*r_y = -bm_font->face->ascent * 64;

	return true;
}

hb_bool_t TextServerAdvanced::_bmp_get_glyph_extents(hb_font_t *p_font, void *p_font_data, hb_codepoint_t p_glyph, hb_glyph_extents_t *r_extents, void *p_user_data) {
	const bmp_font_t *bm_font = reinterpret_cast<const bmp_font_t *>(p_font_data);

	if (!bm_font->face) {
		return false;
	}

	if (!bm_font->face->glyph_map.has(p_glyph)) {
		return false;
	}

	r_extents->x_bearing = 0;
	r_extents->y_bearing = 0;
	r_extents->width = bm_font->face->glyph_map[p_glyph].rect.size.x * 64;
	r_extents->height = bm_font->face->glyph_map[p_glyph].rect.size.y * 64;

	return true;
}

hb_bool_t TextServerAdvanced::_bmp_get_font_h_extents(hb_font_t *p_font, void *p_font_data, hb_font_extents_t *r_metrics, void *p_user_data) {
	const bmp_font_t *bm_font = reinterpret_cast<const bmp_font_t *>(p_font_data);

	if (!bm_font->face) {
		return false;
	}

	r_metrics->ascender = bm_font->face->ascent;
	r_metrics->descender = bm_font->face->descent;
	r_metrics->line_gap = 0;

	return true;
}

void TextServerAdvanced::_bmp_create_font_funcs() {
	if (funcs == nullptr) {
		funcs = hb_font_funcs_create();

		hb_font_funcs_set_font_h_extents_func(funcs, _bmp_get_font_h_extents, nullptr, nullptr);
		hb_font_funcs_set_nominal_glyph_func(funcs, _bmp_get_nominal_glyph, nullptr, nullptr);
		hb_font_funcs_set_glyph_h_advance_func(funcs, _bmp_get_glyph_h_advance, nullptr, nullptr);
		hb_font_funcs_set_glyph_v_advance_func(funcs, _bmp_get_glyph_v_advance, nullptr, nullptr);
		hb_font_funcs_set_glyph_v_origin_func(funcs, _bmp_get_glyph_v_origin, nullptr, nullptr);
		hb_font_funcs_set_glyph_h_kerning_func(funcs, _bmp_get_glyph_h_kerning, nullptr, nullptr);
		hb_font_funcs_set_glyph_extents_func(funcs, _bmp_get_glyph_extents, nullptr, nullptr);

		hb_font_funcs_make_immutable(funcs);
	}
}

void TextServerAdvanced::_bmp_free_font_funcs() {
	if (funcs != nullptr) {
		hb_font_funcs_destroy(funcs);
		funcs = nullptr;
	}
}

void TextServerAdvanced::_bmp_font_set_funcs(hb_font_t *p_font, TextServerAdvanced::FontDataForSizeAdvanced *p_face, bool p_unref) {
	hb_font_set_funcs(p_font, funcs, _bmp_font_create(p_face, p_unref), _bmp_font_destroy);
}

hb_font_t *TextServerAdvanced::_bmp_font_create(TextServerAdvanced::FontDataForSizeAdvanced *p_face, hb_destroy_func_t p_destroy) {
	hb_font_t *font;
	hb_face_t *face = hb_face_create(nullptr, 0);

	font = hb_font_create(face);
	hb_face_destroy(face);
	_bmp_font_set_funcs(font, p_face, false);
	return font;
}

/*************************************************************************/
/*  Character properties.                                                */
/*************************************************************************/

_FORCE_INLINE_ bool is_ain(char32_t p_chr) {
	return u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_AIN;
}

_FORCE_INLINE_ bool is_alef(char32_t p_chr) {
	return u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_ALEF;
}

_FORCE_INLINE_ bool is_beh(char32_t p_chr) {
	int32_t prop = u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP);
	return (prop == U_JG_BEH) || (prop == U_JG_NOON) || (prop == U_JG_AFRICAN_NOON) || (prop == U_JG_NYA) || (prop == U_JG_YEH) || (prop == U_JG_FARSI_YEH);
}

_FORCE_INLINE_ bool is_dal(char32_t p_chr) {
	return u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_DAL;
}

_FORCE_INLINE_ bool is_feh(char32_t p_chr) {
	return (u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_FEH) || (u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_AFRICAN_FEH);
}

_FORCE_INLINE_ bool is_gaf(char32_t p_chr) {
	return u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_GAF;
}

_FORCE_INLINE_ bool is_heh(char32_t p_chr) {
	return u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_HEH;
}

_FORCE_INLINE_ bool is_kaf(char32_t p_chr) {
	return u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_KAF;
}

_FORCE_INLINE_ bool is_lam(char32_t p_chr) {
	return u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_LAM;
}

_FORCE_INLINE_ bool is_qaf(char32_t p_chr) {
	return (u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_QAF) || (u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_AFRICAN_QAF);
}

_FORCE_INLINE_ bool is_reh(char32_t p_chr) {
	return u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_REH;
}

_FORCE_INLINE_ bool is_seen_sad(char32_t p_chr) {
	return (u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_SAD) || (u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_SEEN);
}

_FORCE_INLINE_ bool is_tah(char32_t p_chr) {
	return u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_TAH;
}

_FORCE_INLINE_ bool is_teh_marbuta(char32_t p_chr) {
	return u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_TEH_MARBUTA;
}

_FORCE_INLINE_ bool is_yeh(char32_t p_chr) {
	int32_t prop = u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP);
	return (prop == U_JG_YEH) || (prop == U_JG_FARSI_YEH) || (prop == U_JG_YEH_BARREE) || (prop == U_JG_BURUSHASKI_YEH_BARREE) || (prop == U_JG_YEH_WITH_TAIL);
}

_FORCE_INLINE_ bool is_waw(char32_t p_chr) {
	return u_getIntPropertyValue(p_chr, UCHAR_JOINING_GROUP) == U_JG_WAW;
}

_FORCE_INLINE_ bool is_transparent(char32_t p_chr) {
	return u_getIntPropertyValue(p_chr, UCHAR_JOINING_TYPE) == U_JT_TRANSPARENT;
}

_FORCE_INLINE_ bool is_ligature(char32_t p_chr, char32_t p_nchr) {
	return (is_lam(p_chr) && is_alef(p_nchr));
}

_FORCE_INLINE_ bool is_connected_to_prev(char32_t p_chr, char32_t p_pchr) {
	int32_t prop = u_getIntPropertyValue(p_pchr, UCHAR_JOINING_TYPE);
	return (prop != U_JT_RIGHT_JOINING) && (prop != U_JT_NON_JOINING) ? !is_ligature(p_pchr, p_chr) : false;
}

/*************************************************************************/

bool TextServerAdvanced::has_feature(Feature p_feature) const {
	switch (p_feature) {
		case FEATURE_SIMPLE_LAYOUT:
		case FEATURE_BIDI_LAYOUT:
		case FEATURE_VERTICAL_LAYOUT:
		case FEATURE_SHAPING:
		case FEATURE_KASHIDA_JUSTIFICATION:
		case FEATURE_BREAK_ITERATORS:
		case FEATURE_FONT_BITMAP:
#ifdef MODULE_FREETYPE_ENABLED
		case FEATURE_FONT_DYNAMIC:
#endif
#ifdef MODULE_MSDFGEN_ENABLED
		case FEATURE_FONT_MSDF:
#endif
		case FEATURE_FONT_VARIABLE:
		case FEATURE_CONTEXT_SENSITIVE_CASE_CONVERSION:
		case FEATURE_USE_SUPPORT_DATA:
			return true;
		default: {
		}
	}
	return false;
}

String TextServerAdvanced::get_name() const {
#ifdef GDEXTENSION
	return "ICU / HarfBuzz / Graphite (GDExtension)";
#else
	return "ICU / HarfBuzz / Graphite (Built-in)";
#endif
}

int64_t TextServerAdvanced::get_features() const {
	int64_t interface_features = FEATURE_SIMPLE_LAYOUT | FEATURE_BIDI_LAYOUT | FEATURE_VERTICAL_LAYOUT | FEATURE_SHAPING | FEATURE_KASHIDA_JUSTIFICATION | FEATURE_BREAK_ITERATORS | FEATURE_FONT_BITMAP | FEATURE_FONT_VARIABLE | FEATURE_CONTEXT_SENSITIVE_CASE_CONVERSION | FEATURE_USE_SUPPORT_DATA;
#ifdef MODULE_FREETYPE_ENABLED
	interface_features |= FEATURE_FONT_DYNAMIC;
#endif
#ifdef MODULE_MSDFGEN_ENABLED
	interface_features |= FEATURE_FONT_MSDF;
#endif

	return interface_features;
}

void TextServerAdvanced::free_rid(const RID &p_rid) {
	_THREAD_SAFE_METHOD_
	if (font_owner.owns(p_rid)) {
		FontDataAdvanced *fd = font_owner.get_or_null(p_rid);
		font_owner.free(p_rid);
		memdelete(fd);
	} else if (shaped_owner.owns(p_rid)) {
		ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_rid);
		shaped_owner.free(p_rid);
		memdelete(sd);
	}
}

bool TextServerAdvanced::has(const RID &p_rid) {
	_THREAD_SAFE_METHOD_
	return font_owner.owns(p_rid) || shaped_owner.owns(p_rid);
}

bool TextServerAdvanced::load_support_data(const String &p_filename) {
	_THREAD_SAFE_METHOD_

#ifdef ICU_STATIC_DATA
	if (!icu_data_loaded) {
		UErrorCode err = U_ZERO_ERROR;
		u_init(&err); // Do not check for errors, since we only load part of the data.
		icu_data_loaded = true;
	}
#else
	if (!icu_data_loaded) {
		String filename = (p_filename.is_empty()) ? String("res://") + _MKSTR(ICU_DATA_NAME) : p_filename;

		Ref<File> f;
		f.instantiate();
		if (f->open(filename, File::READ) != OK) {
			return false;
		}
		uint64_t len = f->get_length();
		PackedByteArray icu_data = f->get_buffer(len);
		f->close();

		UErrorCode err = U_ZERO_ERROR;
		udata_setCommonData(icu_data.ptr(), &err);
		if (U_FAILURE(err)) {
			ERR_FAIL_V_MSG(false, u_errorName(err));
		}

		err = U_ZERO_ERROR;
		u_init(&err);
		if (U_FAILURE(err)) {
			ERR_FAIL_V_MSG(false, u_errorName(err));
		}
		icu_data_loaded = true;
	}
#endif
	return true;
}

String TextServerAdvanced::get_support_data_filename() const {
#ifdef ICU_STATIC_DATA
	return _MKSTR(ICU_DATA_NAME);
#else
	return String();
#endif
}

String TextServerAdvanced::get_support_data_info() const {
#ifdef ICU_STATIC_DATA
	return String("ICU break iteration data (") + _MKSTR(ICU_DATA_NAME) + String(").");
#else
	return String();
#endif
}

bool TextServerAdvanced::save_support_data(const String &p_filename) const {
	_THREAD_SAFE_METHOD_
#ifdef ICU_STATIC_DATA

	// Store data to the res file if it's available.

	Ref<File> f;
	f.instantiate();
	if (f->open(p_filename, File::WRITE) != OK) {
		return false;
	}

	PackedByteArray icu_data;
	icu_data.resize(U_ICUDATA_SIZE);
	memcpy(icu_data.ptrw(), U_ICUDATA_ENTRY_POINT, U_ICUDATA_SIZE);
	f->store_buffer(icu_data);
	f->close();
	return true;

#else
	return false;
#endif
}

bool TextServerAdvanced::is_locale_right_to_left(const String &p_locale) const {
	String l = p_locale.get_slicec('_', 0);
	if ((l == "ar") || (l == "dv") || (l == "he") || (l == "fa") || (l == "ff") || (l == "ku") || (l == "ur")) {
		return true;
	} else {
		return false;
	}
}

_FORCE_INLINE_ void TextServerAdvanced::_insert_feature(const StringName &p_name, int32_t p_tag) {
	feature_sets.insert(p_name, p_tag);
	feature_sets_inv.insert(p_tag, p_name);
}

void TextServerAdvanced::_insert_feature_sets() {
	// Registered OpenType feature tags.
	_insert_feature("access_all_alternates", HB_TAG('a', 'a', 'l', 't'));
	_insert_feature("above_base_forms", HB_TAG('a', 'b', 'v', 'f'));
	_insert_feature("above_base_mark_positioning", HB_TAG('a', 'b', 'v', 'm'));
	_insert_feature("above_base_substitutions", HB_TAG('a', 'b', 'v', 's'));
	_insert_feature("alternative_fractions", HB_TAG('a', 'f', 'r', 'c'));
	_insert_feature("akhands", HB_TAG('a', 'k', 'h', 'n'));
	_insert_feature("below_base_forms", HB_TAG('b', 'l', 'w', 'f'));
	_insert_feature("below_base_mark_positioning", HB_TAG('b', 'l', 'w', 'm'));
	_insert_feature("below_base_substitutions", HB_TAG('b', 'l', 'w', 's'));
	_insert_feature("contextual_alternates", HB_TAG('c', 'a', 'l', 't'));
	_insert_feature("case_sensitive_forms", HB_TAG('c', 'a', 's', 'e'));
	_insert_feature("glyph_composition", HB_TAG('c', 'c', 'm', 'p'));
	_insert_feature("conjunct_form_after_ro", HB_TAG('c', 'f', 'a', 'r'));
	_insert_feature("conjunct_forms", HB_TAG('c', 'j', 'c', 't'));
	_insert_feature("contextual_ligatures", HB_TAG('c', 'l', 'i', 'g'));
	_insert_feature("centered_cjk_punctuation", HB_TAG('c', 'p', 'c', 't'));
	_insert_feature("capital_spacing", HB_TAG('c', 'p', 's', 'p'));
	_insert_feature("contextual_swash", HB_TAG('c', 's', 'w', 'h'));
	_insert_feature("cursive_positioning", HB_TAG('c', 'u', 'r', 's'));
	_insert_feature("character_variant_01", HB_TAG('c', 'v', '0', '1'));
	_insert_feature("character_variant_02", HB_TAG('c', 'v', '0', '2'));
	_insert_feature("character_variant_03", HB_TAG('c', 'v', '0', '3'));
	_insert_feature("character_variant_04", HB_TAG('c', 'v', '0', '4'));
	_insert_feature("character_variant_05", HB_TAG('c', 'v', '0', '5'));
	_insert_feature("character_variant_06", HB_TAG('c', 'v', '0', '6'));
	_insert_feature("character_variant_07", HB_TAG('c', 'v', '0', '7'));
	_insert_feature("character_variant_08", HB_TAG('c', 'v', '0', '8'));
	_insert_feature("character_variant_09", HB_TAG('c', 'v', '0', '9'));
	_insert_feature("character_variant_10", HB_TAG('c', 'v', '1', '0'));
	_insert_feature("character_variant_11", HB_TAG('c', 'v', '1', '1'));
	_insert_feature("character_variant_12", HB_TAG('c', 'v', '1', '2'));
	_insert_feature("character_variant_13", HB_TAG('c', 'v', '1', '3'));
	_insert_feature("character_variant_14", HB_TAG('c', 'v', '1', '4'));
	_insert_feature("character_variant_15", HB_TAG('c', 'v', '1', '5'));
	_insert_feature("character_variant_16", HB_TAG('c', 'v', '1', '6'));
	_insert_feature("character_variant_17", HB_TAG('c', 'v', '1', '7'));
	_insert_feature("character_variant_18", HB_TAG('c', 'v', '1', '8'));
	_insert_feature("character_variant_19", HB_TAG('c', 'v', '1', '9'));
	_insert_feature("character_variant_20", HB_TAG('c', 'v', '2', '0'));
	_insert_feature("character_variant_21", HB_TAG('c', 'v', '2', '1'));
	_insert_feature("character_variant_22", HB_TAG('c', 'v', '2', '2'));
	_insert_feature("character_variant_23", HB_TAG('c', 'v', '2', '3'));
	_insert_feature("character_variant_24", HB_TAG('c', 'v', '2', '4'));
	_insert_feature("character_variant_25", HB_TAG('c', 'v', '2', '5'));
	_insert_feature("character_variant_26", HB_TAG('c', 'v', '2', '6'));
	_insert_feature("character_variant_27", HB_TAG('c', 'v', '2', '7'));
	_insert_feature("character_variant_28", HB_TAG('c', 'v', '2', '8'));
	_insert_feature("character_variant_29", HB_TAG('c', 'v', '2', '9'));
	_insert_feature("character_variant_30", HB_TAG('c', 'v', '3', '0'));
	_insert_feature("character_variant_31", HB_TAG('c', 'v', '3', '1'));
	_insert_feature("character_variant_32", HB_TAG('c', 'v', '3', '2'));
	_insert_feature("character_variant_33", HB_TAG('c', 'v', '3', '3'));
	_insert_feature("character_variant_34", HB_TAG('c', 'v', '3', '4'));
	_insert_feature("character_variant_35", HB_TAG('c', 'v', '3', '5'));
	_insert_feature("character_variant_36", HB_TAG('c', 'v', '3', '6'));
	_insert_feature("character_variant_37", HB_TAG('c', 'v', '3', '7'));
	_insert_feature("character_variant_38", HB_TAG('c', 'v', '3', '8'));
	_insert_feature("character_variant_39", HB_TAG('c', 'v', '3', '9'));
	_insert_feature("character_variant_40", HB_TAG('c', 'v', '4', '0'));
	_insert_feature("character_variant_41", HB_TAG('c', 'v', '4', '1'));
	_insert_feature("character_variant_42", HB_TAG('c', 'v', '4', '2'));
	_insert_feature("character_variant_43", HB_TAG('c', 'v', '4', '3'));
	_insert_feature("character_variant_44", HB_TAG('c', 'v', '4', '4'));
	_insert_feature("character_variant_45", HB_TAG('c', 'v', '4', '5'));
	_insert_feature("character_variant_46", HB_TAG('c', 'v', '4', '6'));
	_insert_feature("character_variant_47", HB_TAG('c', 'v', '4', '7'));
	_insert_feature("character_variant_48", HB_TAG('c', 'v', '4', '8'));
	_insert_feature("character_variant_49", HB_TAG('c', 'v', '4', '9'));
	_insert_feature("character_variant_50", HB_TAG('c', 'v', '5', '0'));
	_insert_feature("character_variant_51", HB_TAG('c', 'v', '5', '1'));
	_insert_feature("character_variant_52", HB_TAG('c', 'v', '5', '2'));
	_insert_feature("character_variant_53", HB_TAG('c', 'v', '5', '3'));
	_insert_feature("character_variant_54", HB_TAG('c', 'v', '5', '4'));
	_insert_feature("character_variant_55", HB_TAG('c', 'v', '5', '5'));
	_insert_feature("character_variant_56", HB_TAG('c', 'v', '5', '6'));
	_insert_feature("character_variant_57", HB_TAG('c', 'v', '5', '7'));
	_insert_feature("character_variant_58", HB_TAG('c', 'v', '5', '8'));
	_insert_feature("character_variant_59", HB_TAG('c', 'v', '5', '9'));
	_insert_feature("character_variant_60", HB_TAG('c', 'v', '6', '0'));
	_insert_feature("character_variant_61", HB_TAG('c', 'v', '6', '1'));
	_insert_feature("character_variant_62", HB_TAG('c', 'v', '6', '2'));
	_insert_feature("character_variant_63", HB_TAG('c', 'v', '6', '3'));
	_insert_feature("character_variant_64", HB_TAG('c', 'v', '6', '4'));
	_insert_feature("character_variant_65", HB_TAG('c', 'v', '6', '5'));
	_insert_feature("character_variant_66", HB_TAG('c', 'v', '6', '6'));
	_insert_feature("character_variant_67", HB_TAG('c', 'v', '6', '7'));
	_insert_feature("character_variant_68", HB_TAG('c', 'v', '6', '8'));
	_insert_feature("character_variant_69", HB_TAG('c', 'v', '6', '9'));
	_insert_feature("character_variant_70", HB_TAG('c', 'v', '7', '0'));
	_insert_feature("character_variant_71", HB_TAG('c', 'v', '7', '1'));
	_insert_feature("character_variant_72", HB_TAG('c', 'v', '7', '2'));
	_insert_feature("character_variant_73", HB_TAG('c', 'v', '7', '3'));
	_insert_feature("character_variant_74", HB_TAG('c', 'v', '7', '4'));
	_insert_feature("character_variant_75", HB_TAG('c', 'v', '7', '5'));
	_insert_feature("character_variant_76", HB_TAG('c', 'v', '7', '6'));
	_insert_feature("character_variant_77", HB_TAG('c', 'v', '7', '7'));
	_insert_feature("character_variant_78", HB_TAG('c', 'v', '7', '8'));
	_insert_feature("character_variant_79", HB_TAG('c', 'v', '7', '9'));
	_insert_feature("character_variant_80", HB_TAG('c', 'v', '8', '0'));
	_insert_feature("character_variant_81", HB_TAG('c', 'v', '8', '1'));
	_insert_feature("character_variant_82", HB_TAG('c', 'v', '8', '2'));
	_insert_feature("character_variant_83", HB_TAG('c', 'v', '8', '3'));
	_insert_feature("character_variant_84", HB_TAG('c', 'v', '8', '4'));
	_insert_feature("character_variant_85", HB_TAG('c', 'v', '8', '5'));
	_insert_feature("character_variant_86", HB_TAG('c', 'v', '8', '6'));
	_insert_feature("character_variant_87", HB_TAG('c', 'v', '8', '7'));
	_insert_feature("character_variant_88", HB_TAG('c', 'v', '8', '8'));
	_insert_feature("character_variant_89", HB_TAG('c', 'v', '8', '9'));
	_insert_feature("character_variant_90", HB_TAG('c', 'v', '9', '0'));
	_insert_feature("character_variant_91", HB_TAG('c', 'v', '9', '1'));
	_insert_feature("character_variant_92", HB_TAG('c', 'v', '9', '2'));
	_insert_feature("character_variant_93", HB_TAG('c', 'v', '9', '3'));
	_insert_feature("character_variant_94", HB_TAG('c', 'v', '9', '4'));
	_insert_feature("character_variant_95", HB_TAG('c', 'v', '9', '5'));
	_insert_feature("character_variant_96", HB_TAG('c', 'v', '9', '6'));
	_insert_feature("character_variant_97", HB_TAG('c', 'v', '9', '7'));
	_insert_feature("character_variant_98", HB_TAG('c', 'v', '9', '8'));
	_insert_feature("character_variant_99", HB_TAG('c', 'v', '9', '9'));
	_insert_feature("petite_capitals_from_capitals", HB_TAG('c', '2', 'p', 'c'));
	_insert_feature("small_capitals_from_capitals", HB_TAG('c', '2', 's', 'c'));
	_insert_feature("distances", HB_TAG('d', 'i', 's', 't'));
	_insert_feature("discretionary_ligatures", HB_TAG('d', 'l', 'i', 'g'));
	_insert_feature("denominators", HB_TAG('d', 'n', 'o', 'm'));
	_insert_feature("dotless_forms", HB_TAG('d', 't', 'l', 's'));
	_insert_feature("expert_forms", HB_TAG('e', 'x', 'p', 't'));
	_insert_feature("final_glyph_on_line_alternates", HB_TAG('f', 'a', 'l', 't'));
	_insert_feature("terminal_forms_2", HB_TAG('f', 'i', 'n', '2'));
	_insert_feature("terminal_forms_3", HB_TAG('f', 'i', 'n', '3'));
	_insert_feature("terminal_forms", HB_TAG('f', 'i', 'n', 'a'));
	_insert_feature("flattened_accent_forms", HB_TAG('f', 'l', 'a', 'c'));
	_insert_feature("fractions", HB_TAG('f', 'r', 'a', 'c'));
	_insert_feature("full_widths", HB_TAG('f', 'w', 'i', 'd'));
	_insert_feature("half_forms", HB_TAG('h', 'a', 'l', 'f'));
	_insert_feature("halant_forms", HB_TAG('h', 'a', 'l', 'n'));
	_insert_feature("alternate_half_widths", HB_TAG('h', 'a', 'l', 't'));
	_insert_feature("historical_forms", HB_TAG('h', 'i', 's', 't'));
	_insert_feature("horizontal_kana_alternates", HB_TAG('h', 'k', 'n', 'a'));
	_insert_feature("historical_ligatures", HB_TAG('h', 'l', 'i', 'g'));
	_insert_feature("hangul", HB_TAG('h', 'n', 'g', 'l'));
	_insert_feature("hojo_kanji_forms", HB_TAG('h', 'o', 'j', 'o'));
	_insert_feature("half_widths", HB_TAG('h', 'w', 'i', 'd'));
	_insert_feature("initial_forms", HB_TAG('i', 'n', 'i', 't'));
	_insert_feature("isolated_forms", HB_TAG('i', 's', 'o', 'l'));
	_insert_feature("italics", HB_TAG('i', 't', 'a', 'l'));
	_insert_feature("justification_alternates", HB_TAG('j', 'a', 'l', 't'));
	_insert_feature("jis78_forms", HB_TAG('j', 'p', '7', '8'));
	_insert_feature("jis83_forms", HB_TAG('j', 'p', '8', '3'));
	_insert_feature("jis90_forms", HB_TAG('j', 'p', '9', '0'));
	_insert_feature("jis2004_forms", HB_TAG('j', 'p', '0', '4'));
	_insert_feature("kerning", HB_TAG('k', 'e', 'r', 'n'));
	_insert_feature("left_bounds", HB_TAG('l', 'f', 'b', 'd'));
	_insert_feature("standard_ligatures", HB_TAG('l', 'i', 'g', 'a'));
	_insert_feature("leading_jamo_forms", HB_TAG('l', 'j', 'm', 'o'));
	_insert_feature("lining_figures", HB_TAG('l', 'n', 'u', 'm'));
	_insert_feature("localized_forms", HB_TAG('l', 'o', 'c', 'l'));
	_insert_feature("left_to_right_alternates", HB_TAG('l', 't', 'r', 'a'));
	_insert_feature("left_to_right_mirrored_forms", HB_TAG('l', 't', 'r', 'm'));
	_insert_feature("mark_positioning", HB_TAG('m', 'a', 'r', 'k'));
	_insert_feature("medial_forms_2", HB_TAG('m', 'e', 'd', '2'));
	_insert_feature("medial_forms", HB_TAG('m', 'e', 'd', 'i'));
	_insert_feature("mathematical_greek", HB_TAG('m', 'g', 'r', 'k'));
	_insert_feature("mark_to_mark_positioning", HB_TAG('m', 'k', 'm', 'k'));
	_insert_feature("mark_positioning_via_substitution", HB_TAG('m', 's', 'e', 't'));
	_insert_feature("alternate_annotation_forms", HB_TAG('n', 'a', 'l', 't'));
	_insert_feature("nlc_kanji_forms", HB_TAG('n', 'l', 'c', 'k'));
	_insert_feature("nukta_forms", HB_TAG('n', 'u', 'k', 't'));
	_insert_feature("numerators", HB_TAG('n', 'u', 'm', 'r'));
	_insert_feature("oldstyle_figures", HB_TAG('o', 'n', 'u', 'm'));
	_insert_feature("optical_bounds", HB_TAG('o', 'p', 'b', 'd'));
	_insert_feature("ordinals", HB_TAG('o', 'r', 'd', 'n'));
	_insert_feature("ornaments", HB_TAG('o', 'r', 'n', 'm'));
	_insert_feature("proportional_alternate_widths", HB_TAG('p', 'a', 'l', 't'));
	_insert_feature("petite_capitals", HB_TAG('p', 'c', 'a', 'p'));
	_insert_feature("proportional_kana", HB_TAG('p', 'k', 'n', 'a'));
	_insert_feature("proportional_figures", HB_TAG('p', 'n', 'u', 'm'));
	_insert_feature("pre_base_forms", HB_TAG('p', 'r', 'e', 'f'));
	_insert_feature("pre_base_substitutions", HB_TAG('p', 'r', 'e', 's'));
	_insert_feature("post_base_forms", HB_TAG('p', 's', 't', 'f'));
	_insert_feature("post_base_substitutions", HB_TAG('p', 's', 't', 's'));
	_insert_feature("proportional_widths", HB_TAG('p', 'w', 'i', 'd'));
	_insert_feature("quarter_widths", HB_TAG('q', 'w', 'i', 'd'));
	_insert_feature("randomize", HB_TAG('r', 'a', 'n', 'd'));
	_insert_feature("required_contextual_alternates", HB_TAG('r', 'c', 'l', 't'));
	_insert_feature("rakar_forms", HB_TAG('r', 'k', 'r', 'f'));
	_insert_feature("required_ligatures", HB_TAG('r', 'l', 'i', 'g'));
	_insert_feature("reph_forms", HB_TAG('r', 'p', 'h', 'f'));
	_insert_feature("right_bounds", HB_TAG('r', 't', 'b', 'd'));
	_insert_feature("right_to_left_alternates", HB_TAG('r', 't', 'l', 'a'));
	_insert_feature("right_to_left_mirrored_forms", HB_TAG('r', 't', 'l', 'm'));
	_insert_feature("ruby_notation_forms", HB_TAG('r', 'u', 'b', 'y'));
	_insert_feature("required_variation_alternates", HB_TAG('r', 'v', 'r', 'n'));
	_insert_feature("stylistic_alternates", HB_TAG('s', 'a', 'l', 't'));
	_insert_feature("scientific_inferiors", HB_TAG('s', 'i', 'n', 'f'));
	_insert_feature("optical_size", HB_TAG('s', 'i', 'z', 'e'));
	_insert_feature("small_capitals", HB_TAG('s', 'm', 'c', 'p'));
	_insert_feature("simplified_forms", HB_TAG('s', 'm', 'p', 'l'));
	_insert_feature("stylistic_set_01", HB_TAG('s', 's', '0', '1'));
	_insert_feature("stylistic_set_02", HB_TAG('s', 's', '0', '2'));
	_insert_feature("stylistic_set_03", HB_TAG('s', 's', '0', '3'));
	_insert_feature("stylistic_set_04", HB_TAG('s', 's', '0', '4'));
	_insert_feature("stylistic_set_05", HB_TAG('s', 's', '0', '5'));
	_insert_feature("stylistic_set_06", HB_TAG('s', 's', '0', '6'));
	_insert_feature("stylistic_set_07", HB_TAG('s', 's', '0', '7'));
	_insert_feature("stylistic_set_08", HB_TAG('s', 's', '0', '8'));
	_insert_feature("stylistic_set_09", HB_TAG('s', 's', '0', '9'));
	_insert_feature("stylistic_set_10", HB_TAG('s', 's', '1', '0'));
	_insert_feature("stylistic_set_11", HB_TAG('s', 's', '1', '1'));
	_insert_feature("stylistic_set_12", HB_TAG('s', 's', '1', '2'));
	_insert_feature("stylistic_set_13", HB_TAG('s', 's', '1', '3'));
	_insert_feature("stylistic_set_14", HB_TAG('s', 's', '1', '4'));
	_insert_feature("stylistic_set_15", HB_TAG('s', 's', '1', '5'));
	_insert_feature("stylistic_set_16", HB_TAG('s', 's', '1', '6'));
	_insert_feature("stylistic_set_17", HB_TAG('s', 's', '1', '7'));
	_insert_feature("stylistic_set_18", HB_TAG('s', 's', '1', '8'));
	_insert_feature("stylistic_set_19", HB_TAG('s', 's', '1', '9'));
	_insert_feature("stylistic_set_20", HB_TAG('s', 's', '2', '0'));
	_insert_feature("math_script_style_alternates", HB_TAG('s', 's', 't', 'y'));
	_insert_feature("stretching_glyph_decomposition", HB_TAG('s', 't', 'c', 'h'));
	_insert_feature("subscript", HB_TAG('s', 'u', 'b', 's'));
	_insert_feature("superscript", HB_TAG('s', 'u', 'p', 's'));
	_insert_feature("swash", HB_TAG('s', 'w', 's', 'h'));
	_insert_feature("titling", HB_TAG('t', 'i', 't', 'l'));
	_insert_feature("trailing_jamo_forms", HB_TAG('t', 'j', 'm', 'o'));
	_insert_feature("traditional_name_forms", HB_TAG('t', 'n', 'a', 'm'));
	_insert_feature("tabular_figures", HB_TAG('t', 'n', 'u', 'm'));
	_insert_feature("traditional_forms", HB_TAG('t', 'r', 'a', 'd'));
	_insert_feature("third_widths", HB_TAG('t', 'w', 'i', 'd'));
	_insert_feature("unicase", HB_TAG('u', 'n', 'i', 'c'));
	_insert_feature("alternate_vertical_metrics", HB_TAG('v', 'a', 'l', 't'));
	_insert_feature("vattu_variants", HB_TAG('v', 'a', 't', 'u'));
	_insert_feature("vertical_writing", HB_TAG('v', 'e', 'r', 't'));
	_insert_feature("alternate_vertical_half_metrics", HB_TAG('v', 'h', 'a', 'l'));
	_insert_feature("vowel_jamo_forms", HB_TAG('v', 'j', 'm', 'o'));
	_insert_feature("vertical_kana_alternates", HB_TAG('v', 'k', 'n', 'a'));
	_insert_feature("vertical_kerning", HB_TAG('v', 'k', 'r', 'n'));
	_insert_feature("proportional_alternate_vertical_metrics", HB_TAG('v', 'p', 'a', 'l'));
	_insert_feature("vertical_alternates_and_rotation", HB_TAG('v', 'r', 't', '2'));
	_insert_feature("vertical_alternates_for_rotation", HB_TAG('v', 'r', 't', 'r'));
	_insert_feature("slashed_zero", HB_TAG('z', 'e', 'r', 'o'));

	// Registered OpenType variation tag.
	_insert_feature("italic", HB_TAG('i', 't', 'a', 'l'));
	_insert_feature("optical_size", HB_TAG('o', 'p', 's', 'z'));
	_insert_feature("slant", HB_TAG('s', 'l', 'n', 't'));
	_insert_feature("width", HB_TAG('w', 'd', 't', 'h'));
	_insert_feature("weight", HB_TAG('w', 'g', 'h', 't'));
}

int64_t TextServerAdvanced::name_to_tag(const String &p_name) const {
	if (feature_sets.has(p_name)) {
		return feature_sets[p_name];
	}

	// No readable name, use tag string.
	return hb_tag_from_string(p_name.replace("custom_", "").ascii().get_data(), -1);
}

String TextServerAdvanced::tag_to_name(int64_t p_tag) const {
	if (feature_sets_inv.has(p_tag)) {
		return feature_sets_inv[p_tag];
	}

	// No readable name, use tag string.
	char name[5];
	memset(name, 0, 5);
	hb_tag_to_string(p_tag, name);
	return String("custom_") + String(name);
}

/*************************************************************************/
/* Font Glyph Rendering                                                  */
/*************************************************************************/

_FORCE_INLINE_ TextServerAdvanced::FontTexturePosition TextServerAdvanced::find_texture_pos_for_glyph(FontDataForSizeAdvanced *p_data, int p_color_size, Image::Format p_image_format, int p_width, int p_height, bool p_msdf) const {
	FontTexturePosition ret;
	ret.index = -1;

	int mw = p_width;
	int mh = p_height;

	for (int i = 0; i < p_data->textures.size(); i++) {
		const FontTexture &ct = p_data->textures[i];

		if (RenderingServer::get_singleton() != nullptr) {
			if (ct.texture->get_format() != p_image_format) {
				continue;
			}
		}

		if (mw > ct.texture_w || mh > ct.texture_h) { // Too big for this texture.
			continue;
		}

		if (ct.offsets.size() < ct.texture_w) {
			continue;
		}

		ret.y = 0x7fffffff;
		ret.x = 0;

		for (int j = 0; j < ct.texture_w - mw; j++) {
			int max_y = 0;

			for (int k = j; k < j + mw; k++) {
				int y = ct.offsets[k];
				if (y > max_y) {
					max_y = y;
				}
			}

			if (max_y < ret.y) {
				ret.y = max_y;
				ret.x = j;
			}
		}

		if (ret.y == 0x7fffffff || ret.y + mh > ct.texture_h) {
			continue; // Fail, could not fit it here.
		}

		ret.index = i;
		break;
	}

	if (ret.index == -1) {
		// Could not find texture to fit, create one.
		ret.x = 0;
		ret.y = 0;

		int texsize = MAX(p_data->size.x * p_data->oversampling * 8, 256);
		if (mw > texsize) {
			texsize = mw; // Special case, adapt to it?
		}
		if (mh > texsize) {
			texsize = mh; // Special case, adapt to it?
		}

#ifdef GDEXTENSION
		texsize = Math::next_power_of_2(texsize);
#else
		texsize = next_power_of_2(texsize);
#endif
		if (p_msdf) {
			texsize = MIN(texsize, 2048);
		} else {
			texsize = MIN(texsize, 1024);
		}

		FontTexture tex;
		tex.texture_w = texsize;
		tex.texture_h = texsize;
		tex.format = p_image_format;
		tex.imgdata.resize(texsize * texsize * p_color_size);

		{
			// Zero texture.
			uint8_t *w = tex.imgdata.ptrw();
			ERR_FAIL_COND_V(texsize * texsize * p_color_size > tex.imgdata.size(), ret);
			// Initialize the texture to all-white pixels to prevent artifacts when the
			// font is displayed at a non-default scale with filtering enabled.
			if (p_color_size == 2) {
				for (int i = 0; i < texsize * texsize * p_color_size; i += 2) { // FORMAT_LA8, BW font.
					w[i + 0] = 255;
					w[i + 1] = 0;
				}
			} else if (p_color_size == 4) {
				for (int i = 0; i < texsize * texsize * p_color_size; i += 4) { // FORMAT_RGBA8, Color font, Multichannel(+True) SDF.
					w[i + 0] = 255;
					w[i + 1] = 255;
					w[i + 2] = 255;
					w[i + 3] = 0;
				}
			} else {
				ERR_FAIL_V(ret);
			}
		}
		tex.offsets.resize(texsize);
		int32_t *offw = tex.offsets.ptrw();
		for (int i = 0; i < texsize; i++) { // Zero offsets.
			offw[i] = 0;
		}

		p_data->textures.push_back(tex);
		ret.index = p_data->textures.size() - 1;
	}

	return ret;
}

#ifdef MODULE_MSDFGEN_ENABLED

struct MSContext {
	msdfgen::Point2 position;
	msdfgen::Shape *shape;
	msdfgen::Contour *contour;
};

class DistancePixelConversion {
	double invRange;

public:
	_FORCE_INLINE_ explicit DistancePixelConversion(double range) :
			invRange(1 / range) {}
	_FORCE_INLINE_ void operator()(float *pixels, const msdfgen::MultiAndTrueDistance &distance) const {
		pixels[0] = float(invRange * distance.r + .5);
		pixels[1] = float(invRange * distance.g + .5);
		pixels[2] = float(invRange * distance.b + .5);
		pixels[3] = float(invRange * distance.a + .5);
	}
};

struct MSDFThreadData {
	msdfgen::Bitmap<float, 4> *output;
	msdfgen::Shape *shape;
	msdfgen::Projection *projection;
	DistancePixelConversion *distancePixelConversion;
};

static msdfgen::Point2 ft_point2(const FT_Vector &vector) {
	return msdfgen::Point2(vector.x / 60.0f, vector.y / 60.0f);
}

static int ft_move_to(const FT_Vector *to, void *user) {
	MSContext *context = reinterpret_cast<MSContext *>(user);
	if (!(context->contour && context->contour->edges.empty())) {
		context->contour = &context->shape->addContour();
	}
	context->position = ft_point2(*to);
	return 0;
}

static int ft_line_to(const FT_Vector *to, void *user) {
	MSContext *context = reinterpret_cast<MSContext *>(user);
	msdfgen::Point2 endpoint = ft_point2(*to);
	if (endpoint != context->position) {
		context->contour->addEdge(new msdfgen::LinearSegment(context->position, endpoint));
		context->position = endpoint;
	}
	return 0;
}

static int ft_conic_to(const FT_Vector *control, const FT_Vector *to, void *user) {
	MSContext *context = reinterpret_cast<MSContext *>(user);
	context->contour->addEdge(new msdfgen::QuadraticSegment(context->position, ft_point2(*control), ft_point2(*to)));
	context->position = ft_point2(*to);
	return 0;
}

static int ft_cubic_to(const FT_Vector *control1, const FT_Vector *control2, const FT_Vector *to, void *user) {
	MSContext *context = reinterpret_cast<MSContext *>(user);
	context->contour->addEdge(new msdfgen::CubicSegment(context->position, ft_point2(*control1), ft_point2(*control2), ft_point2(*to)));
	context->position = ft_point2(*to);
	return 0;
}

void TextServerAdvanced::_generateMTSDF_threaded(uint32_t y, void *p_td) const {
	MSDFThreadData *td = (MSDFThreadData *)p_td;

	msdfgen::ShapeDistanceFinder<msdfgen::OverlappingContourCombiner<msdfgen::MultiAndTrueDistanceSelector>> distanceFinder(*td->shape);
	int row = td->shape->inverseYAxis ? td->output->height() - y - 1 : y;
	for (int col = 0; col < td->output->width(); ++col) {
		int x = (y % 2) ? td->output->width() - col - 1 : col;
		msdfgen::Point2 p = td->projection->unproject(msdfgen::Point2(x + .5, y + .5));
		msdfgen::MultiAndTrueDistance distance = distanceFinder.distance(p);
		td->distancePixelConversion->operator()(td->output->operator()(x, row), distance);
	}
}

_FORCE_INLINE_ TextServerAdvanced::FontGlyph TextServerAdvanced::rasterize_msdf(FontDataAdvanced *p_font_data, FontDataForSizeAdvanced *p_data, int p_pixel_range, int p_rect_margin, FT_Outline *outline, const Vector2 &advance) const {
	msdfgen::Shape shape;

	shape.contours.clear();
	shape.inverseYAxis = false;

	MSContext context = {};
	context.shape = &shape;
	FT_Outline_Funcs ft_functions;
	ft_functions.move_to = &ft_move_to;
	ft_functions.line_to = &ft_line_to;
	ft_functions.conic_to = &ft_conic_to;
	ft_functions.cubic_to = &ft_cubic_to;
	ft_functions.shift = 0;
	ft_functions.delta = 0;

	int error = FT_Outline_Decompose(outline, &ft_functions, &context);
	ERR_FAIL_COND_V_MSG(error, FontGlyph(), "FreeType: Outline decomposition error: '" + String(FT_Error_String(error)) + "'.");
	if (!shape.contours.empty() && shape.contours.back().edges.empty()) {
		shape.contours.pop_back();
	}

	if (FT_Outline_Get_Orientation(outline) == 1) {
		for (int i = 0; i < (int)shape.contours.size(); ++i) {
			shape.contours[i].reverse();
		}
	}

	shape.inverseYAxis = true;
	shape.normalize();

	msdfgen::Shape::Bounds bounds = shape.getBounds(p_pixel_range);

	FontGlyph chr;
	chr.found = true;
	chr.advance = advance;

	if (shape.validate() && shape.contours.size() > 0) {
		int w = (bounds.r - bounds.l);
		int h = (bounds.t - bounds.b);

		int mw = w + p_rect_margin * 2;
		int mh = h + p_rect_margin * 2;

		ERR_FAIL_COND_V(mw > 1024, FontGlyph());
		ERR_FAIL_COND_V(mh > 1024, FontGlyph());

		FontTexturePosition tex_pos = find_texture_pos_for_glyph(p_data, 4, Image::FORMAT_RGBA8, mw, mh, true);
		ERR_FAIL_COND_V(tex_pos.index < 0, FontGlyph());
		FontTexture &tex = p_data->textures.write[tex_pos.index];

		edgeColoringSimple(shape, 3.0); // Max. angle.
		msdfgen::Bitmap<float, 4> image(w, h); // Texture size.

		DistancePixelConversion distancePixelConversion(p_pixel_range);
		msdfgen::Projection projection(msdfgen::Vector2(1.0, 1.0), msdfgen::Vector2(-bounds.l, -bounds.b));
		msdfgen::MSDFGeneratorConfig config(true, msdfgen::ErrorCorrectionConfig());

		MSDFThreadData td;
		td.output = &image;
		td.shape = &shape;
		td.projection = &projection;
		td.distancePixelConversion = &distancePixelConversion;

		if (p_font_data->work_pool.get_thread_count() == 0) {
			p_font_data->work_pool.init();
		}
		p_font_data->work_pool.do_work(h, this, &TextServerAdvanced::_generateMTSDF_threaded, &td);

		msdfgen::msdfErrorCorrection(image, shape, projection, p_pixel_range, config);

		{
			uint8_t *wr = tex.imgdata.ptrw();

			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					int ofs = ((i + tex_pos.y + p_rect_margin) * tex.texture_w + j + tex_pos.x + p_rect_margin) * 4;
					ERR_FAIL_COND_V(ofs >= tex.imgdata.size(), FontGlyph());
					wr[ofs + 0] = (uint8_t)(CLAMP(image(j, i)[0] * 256.f, 0.f, 255.f));
					wr[ofs + 1] = (uint8_t)(CLAMP(image(j, i)[1] * 256.f, 0.f, 255.f));
					wr[ofs + 2] = (uint8_t)(CLAMP(image(j, i)[2] * 256.f, 0.f, 255.f));
					wr[ofs + 3] = (uint8_t)(CLAMP(image(j, i)[3] * 256.f, 0.f, 255.f));
				}
			}
		}

		// Blit to image and texture.
		{
			if (RenderingServer::get_singleton() != nullptr) {
				Ref<Image> img;
				img.instantiate();
				img->create_from_data(tex.texture_w, tex.texture_h, 0, Image::FORMAT_RGBA8, tex.imgdata);
				if (tex.texture.is_null()) {
					tex.texture.instantiate();
					tex.texture->create_from_image(img);
				} else {
					tex.texture->update(img);
				}
			}
		}

		// Update height array.
		int32_t *offw = tex.offsets.ptrw();
		for (int k = tex_pos.x; k < tex_pos.x + mw; k++) {
			offw[k] = tex_pos.y + mh;
		}

		chr.texture_idx = tex_pos.index;

		chr.uv_rect = Rect2(tex_pos.x + p_rect_margin, tex_pos.y + p_rect_margin, w, h);
		chr.rect.position = Vector2(bounds.l, -bounds.t);
		chr.rect.size = chr.uv_rect.size;
	}
	return chr;
}
#endif

#ifdef MODULE_FREETYPE_ENABLED
_FORCE_INLINE_ TextServerAdvanced::FontGlyph TextServerAdvanced::rasterize_bitmap(FontDataForSizeAdvanced *p_data, int p_rect_margin, FT_Bitmap bitmap, int yofs, int xofs, const Vector2 &advance) const {
	int w = bitmap.width;
	int h = bitmap.rows;

	int mw = w + p_rect_margin * 2;
	int mh = h + p_rect_margin * 2;

	ERR_FAIL_COND_V(mw > 1024, FontGlyph());
	ERR_FAIL_COND_V(mh > 1024, FontGlyph());

	int color_size = bitmap.pixel_mode == FT_PIXEL_MODE_BGRA ? 4 : 2;
	Image::Format require_format = color_size == 4 ? Image::FORMAT_RGBA8 : Image::FORMAT_LA8;

	FontTexturePosition tex_pos = find_texture_pos_for_glyph(p_data, color_size, require_format, mw, mh, false);
	ERR_FAIL_COND_V(tex_pos.index < 0, FontGlyph());

	// Fit character in char texture.

	FontTexture &tex = p_data->textures.write[tex_pos.index];

	{
		uint8_t *wr = tex.imgdata.ptrw();

		for (int i = 0; i < h; i++) {
			for (int j = 0; j < w; j++) {
				int ofs = ((i + tex_pos.y + p_rect_margin) * tex.texture_w + j + tex_pos.x + p_rect_margin) * color_size;
				ERR_FAIL_COND_V(ofs >= tex.imgdata.size(), FontGlyph());
				switch (bitmap.pixel_mode) {
					case FT_PIXEL_MODE_MONO: {
						int byte = i * bitmap.pitch + (j >> 3);
						int bit = 1 << (7 - (j % 8));
						wr[ofs + 0] = 255; // grayscale as 1
						wr[ofs + 1] = (bitmap.buffer[byte] & bit) ? 255 : 0;
					} break;
					case FT_PIXEL_MODE_GRAY:
						wr[ofs + 0] = 255; // grayscale as 1
						wr[ofs + 1] = bitmap.buffer[i * bitmap.pitch + j];
						break;
					case FT_PIXEL_MODE_BGRA: {
						int ofs_color = i * bitmap.pitch + (j << 2);
						wr[ofs + 2] = bitmap.buffer[ofs_color + 0];
						wr[ofs + 1] = bitmap.buffer[ofs_color + 1];
						wr[ofs + 0] = bitmap.buffer[ofs_color + 2];
						wr[ofs + 3] = bitmap.buffer[ofs_color + 3];
					} break;
					default:
						ERR_FAIL_V_MSG(FontGlyph(), "Font uses unsupported pixel format: " + String::num_int64(bitmap.pixel_mode) + ".");
						break;
				}
			}
		}
	}

	// Blit to image and texture.
	{
		if (RenderingServer::get_singleton() != nullptr) {
			Ref<Image> img;
			img.instantiate();
			img->create_from_data(tex.texture_w, tex.texture_h, 0, require_format, tex.imgdata);

			if (tex.texture.is_null()) {
				tex.texture.instantiate();
				tex.texture->create_from_image(img);
			} else {
				tex.texture->update(img);
			}
		}
	}

	// Update height array.
	int32_t *offw = tex.offsets.ptrw();
	for (int k = tex_pos.x; k < tex_pos.x + mw; k++) {
		offw[k] = tex_pos.y + mh;
	}

	FontGlyph chr;
	chr.advance = advance * p_data->scale / p_data->oversampling;
	chr.texture_idx = tex_pos.index;
	chr.found = true;

	chr.uv_rect = Rect2(tex_pos.x + p_rect_margin, tex_pos.y + p_rect_margin, w, h);
	chr.rect.position = Vector2(xofs, -yofs) * p_data->scale / p_data->oversampling;
	chr.rect.size = chr.uv_rect.size * p_data->scale / p_data->oversampling;
	return chr;
}
#endif

/*************************************************************************/
/* Font Cache                                                            */
/*************************************************************************/

_FORCE_INLINE_ bool TextServerAdvanced::_ensure_glyph(FontDataAdvanced *p_font_data, const Vector2i &p_size, int32_t p_glyph) const {
	ERR_FAIL_COND_V(!_ensure_cache_for_size(p_font_data, p_size), false);

	int32_t glyph_index = p_glyph & 0xffffff; // Remove subpixel shifts.

	FontDataForSizeAdvanced *fd = p_font_data->cache[p_size];
	if (fd->glyph_map.has(p_glyph)) {
		return fd->glyph_map[p_glyph].found;
	}

	if (glyph_index == 0) { // Non graphical or invalid glyph, do not render.
		fd->glyph_map[p_glyph] = FontGlyph();
		return true;
	}

#ifdef MODULE_FREETYPE_ENABLED
	FontGlyph gl;
	if (fd->face) {
		FT_Int32 flags = FT_LOAD_DEFAULT;

		bool outline = p_size.y > 0;
		switch (p_font_data->hinting) {
			case TextServer::HINTING_NONE:
				flags |= FT_LOAD_NO_HINTING;
				break;
			case TextServer::HINTING_LIGHT:
				flags |= FT_LOAD_TARGET_LIGHT;
				break;
			default:
				flags |= FT_LOAD_TARGET_NORMAL;
				break;
		}
		if (p_font_data->force_autohinter) {
			flags |= FT_LOAD_FORCE_AUTOHINT;
		}
		if (outline) {
			flags |= FT_LOAD_NO_BITMAP;
		} else if (FT_HAS_COLOR(fd->face)) {
			flags |= FT_LOAD_COLOR;
		}

		FT_Fixed v, h;
		FT_Get_Advance(fd->face, glyph_index, flags, &h);
		FT_Get_Advance(fd->face, glyph_index, flags | FT_LOAD_VERTICAL_LAYOUT, &v);

		int error = FT_Load_Glyph(fd->face, glyph_index, flags);
		if (error) {
			fd->glyph_map[p_glyph] = FontGlyph();
			return false;
		}

		if (!p_font_data->msdf) {
			if ((p_font_data->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_QUARTER) || (p_font_data->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && p_size.x <= SUBPIXEL_POSITIONING_ONE_QUARTER_MAX_SIZE)) {
				FT_Pos xshift = (int)((p_glyph >> 27) & 3) << 4;
				FT_Outline_Translate(&fd->face->glyph->outline, xshift, 0);
			} else if ((p_font_data->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_HALF) || (p_font_data->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && p_size.x <= SUBPIXEL_POSITIONING_ONE_HALF_MAX_SIZE)) {
				FT_Pos xshift = (int)((p_glyph >> 27) & 3) << 5;
				FT_Outline_Translate(&fd->face->glyph->outline, xshift, 0);
			}
		}

		if (p_font_data->embolden != 0.f) {
			FT_Pos strength = p_font_data->embolden * p_size.x * 4; // 26.6 fractional units (1 / 64).
			FT_Outline_Embolden(&fd->face->glyph->outline, strength);
		}

		if (p_font_data->transform != Transform2D()) {
			FT_Matrix mat = { FT_Fixed(p_font_data->transform[0][0] * 65536), FT_Fixed(p_font_data->transform[0][1] * 65536), FT_Fixed(p_font_data->transform[1][0] * 65536), FT_Fixed(p_font_data->transform[1][1] * 65536) }; // 16.16 fractional units (1 / 65536).
			FT_Outline_Transform(&fd->face->glyph->outline, &mat);
		}

		if (!outline) {
			if (!p_font_data->msdf) {
				error = FT_Render_Glyph(fd->face->glyph, p_font_data->antialiased ? FT_RENDER_MODE_NORMAL : FT_RENDER_MODE_MONO);
			}
			FT_GlyphSlot slot = fd->face->glyph;
			if (!error) {
				if (p_font_data->msdf) {
#ifdef MODULE_MSDFGEN_ENABLED
					gl = rasterize_msdf(p_font_data, fd, p_font_data->msdf_range, rect_range, &slot->outline, Vector2((h + (1 << 9)) >> 10, (v + (1 << 9)) >> 10) / 64.0);
#else
					fd->glyph_map[p_glyph] = FontGlyph();
					ERR_FAIL_V_MSG(false, "Compiled without MSDFGEN support!");
#endif
				} else {
					gl = rasterize_bitmap(fd, rect_range, slot->bitmap, slot->bitmap_top, slot->bitmap_left, Vector2((h + (1 << 9)) >> 10, (v + (1 << 9)) >> 10) / 64.0);
				}
			}
		} else {
			FT_Stroker stroker;
			if (FT_Stroker_New(ft_library, &stroker) != 0) {
				fd->glyph_map[p_glyph] = FontGlyph();
				ERR_FAIL_V_MSG(false, "FreeType: Failed to load glyph stroker.");
			}

			FT_Stroker_Set(stroker, (int)(fd->size.y * fd->oversampling * 16.0), FT_STROKER_LINECAP_BUTT, FT_STROKER_LINEJOIN_ROUND, 0);
			FT_Glyph glyph;
			FT_BitmapGlyph glyph_bitmap;

			if (FT_Get_Glyph(fd->face->glyph, &glyph) != 0) {
				goto cleanup_stroker;
			}
			if (FT_Glyph_Stroke(&glyph, stroker, 1) != 0) {
				goto cleanup_glyph;
			}
			if (FT_Glyph_To_Bitmap(&glyph, p_font_data->antialiased ? FT_RENDER_MODE_NORMAL : FT_RENDER_MODE_MONO, nullptr, 1) != 0) {
				goto cleanup_glyph;
			}
			glyph_bitmap = (FT_BitmapGlyph)glyph;
			gl = rasterize_bitmap(fd, rect_range, glyph_bitmap->bitmap, glyph_bitmap->top, glyph_bitmap->left, Vector2());

		cleanup_glyph:
			FT_Done_Glyph(glyph);
		cleanup_stroker:
			FT_Stroker_Done(stroker);
		}
		fd->glyph_map[p_glyph] = gl;
		return gl.found;
	}
#endif
	fd->glyph_map[p_glyph] = FontGlyph();
	return false;
}

_FORCE_INLINE_ bool TextServerAdvanced::_ensure_cache_for_size(FontDataAdvanced *p_font_data, const Vector2i &p_size) const {
	ERR_FAIL_COND_V(p_size.x <= 0, false);
	if (p_font_data->cache.has(p_size)) {
		return true;
	}

	FontDataForSizeAdvanced *fd = memnew(FontDataForSizeAdvanced);
	fd->size = p_size;
	if (p_font_data->data_ptr && (p_font_data->data_size > 0)) {
		// Init dynamic font.
#ifdef MODULE_FREETYPE_ENABLED
		int error = 0;
		if (!ft_library) {
			error = FT_Init_FreeType(&ft_library);
			ERR_FAIL_COND_V_MSG(error != 0, false, "FreeType: Error initializing library: '" + String(FT_Error_String(error)) + "'.");
		}

		memset(&fd->stream, 0, sizeof(FT_StreamRec));
		fd->stream.base = (unsigned char *)p_font_data->data_ptr;
		fd->stream.size = p_font_data->data_size;
		fd->stream.pos = 0;

		FT_Open_Args fargs;
		memset(&fargs, 0, sizeof(FT_Open_Args));
		fargs.memory_base = (unsigned char *)p_font_data->data_ptr;
		fargs.memory_size = p_font_data->data_size;
		fargs.flags = FT_OPEN_MEMORY;
		fargs.stream = &fd->stream;
		error = FT_Open_Face(ft_library, &fargs, 0, &fd->face);
		if (error) {
			FT_Done_Face(fd->face);
			fd->face = nullptr;
			ERR_FAIL_V_MSG(false, "FreeType: Error loading font: '" + String(FT_Error_String(error)) + "'.");
		}

		if (p_font_data->msdf) {
			fd->oversampling = 1.0;
			fd->size.x = p_font_data->msdf_source_size;
		} else if (p_font_data->oversampling <= 0.0) {
			fd->oversampling = font_get_global_oversampling();
		} else {
			fd->oversampling = p_font_data->oversampling;
		}

		if (FT_HAS_COLOR(fd->face) && fd->face->num_fixed_sizes > 0) {
			int best_match = 0;
			int diff = ABS(fd->size.x - ((int64_t)fd->face->available_sizes[0].width));
			fd->scale = double(fd->size.x * fd->oversampling) / fd->face->available_sizes[0].width;
			for (int i = 1; i < fd->face->num_fixed_sizes; i++) {
				int ndiff = ABS(fd->size.x - ((int64_t)fd->face->available_sizes[i].width));
				if (ndiff < diff) {
					best_match = i;
					diff = ndiff;
					fd->scale = double(fd->size.x * fd->oversampling) / fd->face->available_sizes[i].width;
				}
			}
			FT_Select_Size(fd->face, best_match);
		} else {
			FT_Set_Pixel_Sizes(fd->face, 0, double(fd->size.x * fd->oversampling));
			fd->scale = ((double)fd->size.x * fd->oversampling) / (double)fd->face->size->metrics.y_ppem;
		}

		fd->hb_handle = hb_ft_font_create(fd->face, nullptr);

		fd->ascent = (fd->face->size->metrics.ascender / 64.0) / fd->oversampling * fd->scale;
		fd->descent = (-fd->face->size->metrics.descender / 64.0) / fd->oversampling * fd->scale;
		fd->underline_position = (-FT_MulFix(fd->face->underline_position, fd->face->size->metrics.y_scale) / 64.0) / fd->oversampling * fd->scale;
		fd->underline_thickness = (FT_MulFix(fd->face->underline_thickness, fd->face->size->metrics.y_scale) / 64.0) / fd->oversampling * fd->scale;

		hb_font_set_synthetic_slant(fd->hb_handle, p_font_data->transform.elements[0][1]);

		if (!p_font_data->face_init) {
			// Get style flags and name.
			if (fd->face->family_name != nullptr) {
				p_font_data->font_name = String::utf8((const char *)fd->face->family_name);
			}
			if (fd->face->style_name != nullptr) {
				p_font_data->style_name = String::utf8((const char *)fd->face->style_name);
			}
			p_font_data->style_flags = 0;
			if (fd->face->style_flags & FT_STYLE_FLAG_BOLD) {
				p_font_data->style_flags |= FONT_BOLD;
			}
			if (fd->face->style_flags & FT_STYLE_FLAG_ITALIC) {
				p_font_data->style_flags |= FONT_ITALIC;
			}
			if (fd->face->face_flags & FT_FACE_FLAG_FIXED_WIDTH) {
				p_font_data->style_flags |= FONT_FIXED_WIDTH;
			}
			// Get supported scripts from OpenType font data.
			p_font_data->supported_scripts.clear();
			unsigned int count = hb_ot_layout_table_get_script_tags(hb_font_get_face(fd->hb_handle), HB_OT_TAG_GSUB, 0, nullptr, nullptr);
			if (count != 0) {
				hb_tag_t *script_tags = (hb_tag_t *)memalloc(count * sizeof(hb_tag_t));
				hb_ot_layout_table_get_script_tags(hb_font_get_face(fd->hb_handle), HB_OT_TAG_GSUB, 0, &count, script_tags);
				for (unsigned int i = 0; i < count; i++) {
					p_font_data->supported_scripts.insert(script_tags[i]);
				}
				memfree(script_tags);
			}
			count = hb_ot_layout_table_get_script_tags(hb_font_get_face(fd->hb_handle), HB_OT_TAG_GPOS, 0, nullptr, nullptr);
			if (count != 0) {
				hb_tag_t *script_tags = (hb_tag_t *)memalloc(count * sizeof(hb_tag_t));
				hb_ot_layout_table_get_script_tags(hb_font_get_face(fd->hb_handle), HB_OT_TAG_GPOS, 0, &count, script_tags);
				for (unsigned int i = 0; i < count; i++) {
					p_font_data->supported_scripts.insert(script_tags[i]);
				}
				memfree(script_tags);
			}

			// Get supported scripts from OS2 table.
			TT_OS2 *os2 = (TT_OS2 *)FT_Get_Sfnt_Table(fd->face, FT_SFNT_OS2);
			if (os2) {
				if ((os2->ulUnicodeRange1 & 1L << 4) || (os2->ulUnicodeRange1 & 1L << 5) || (os2->ulUnicodeRange1 & 1L << 6) || (os2->ulUnicodeRange1 & 1L << 31) || (os2->ulUnicodeRange2 & 1L << 0) || (os2->ulUnicodeRange2 & 1L << 1) || (os2->ulUnicodeRange2 & 1L << 2) || (os2->ulUnicodeRange2 & 1L << 3) || (os2->ulUnicodeRange2 & 1L << 4) || (os2->ulUnicodeRange2 & 1L << 5) || (os2->ulUnicodeRange2 & 1L << 6) || (os2->ulUnicodeRange2 & 1L << 7) || (os2->ulUnicodeRange2 & 1L << 8) || (os2->ulUnicodeRange2 & 1L << 9) || (os2->ulUnicodeRange2 & 1L << 10) || (os2->ulUnicodeRange2 & 1L << 11) || (os2->ulUnicodeRange2 & 1L << 12) || (os2->ulUnicodeRange2 & 1L << 13) || (os2->ulUnicodeRange2 & 1L << 14) || (os2->ulUnicodeRange2 & 1L << 15) || (os2->ulUnicodeRange2 & 1L << 30) || (os2->ulUnicodeRange3 & 1L << 0) || (os2->ulUnicodeRange3 & 1L << 1) || (os2->ulUnicodeRange3 & 1L << 2) || (os2->ulUnicodeRange3 & 1L << 4) || (os2->ulUnicodeRange3 & 1L << 5) || (os2->ulUnicodeRange3 & 1L << 18) || (os2->ulUnicodeRange3 & 1L << 24) || (os2->ulUnicodeRange3 & 1L << 25) || (os2->ulUnicodeRange3 & 1L << 26) || (os2->ulUnicodeRange3 & 1L << 27) || (os2->ulUnicodeRange3 & 1L << 28) || (os2->ulUnicodeRange4 & 1L << 3) || (os2->ulUnicodeRange4 & 1L << 6) || (os2->ulUnicodeRange4 & 1L << 15) || (os2->ulUnicodeRange4 & 1L << 23) || (os2->ulUnicodeRange4 & 1L << 24) || (os2->ulUnicodeRange4 & 1L << 26)) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_COMMON);
				}
				if ((os2->ulUnicodeRange1 & 1L << 0) || (os2->ulUnicodeRange1 & 1L << 1) || (os2->ulUnicodeRange1 & 1L << 2) || (os2->ulUnicodeRange1 & 1L << 3) || (os2->ulUnicodeRange1 & 1L << 29)) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_LATIN);
				}
				if ((os2->ulUnicodeRange1 & 1L << 7) || (os2->ulUnicodeRange1 & 1L << 30)) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_GREEK);
				}
				if (os2->ulUnicodeRange1 & 1L << 8) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_COPTIC);
				}
				if (os2->ulUnicodeRange1 & 1L << 9) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_CYRILLIC);
				}
				if (os2->ulUnicodeRange1 & 1L << 10) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_ARMENIAN);
				}
				if (os2->ulUnicodeRange1 & 1L << 11) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_HEBREW);
				}
				if (os2->ulUnicodeRange1 & 1L << 12) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_VAI);
				}
				if ((os2->ulUnicodeRange1 & 1L << 13) || (os2->ulUnicodeRange2 & 1L << 31) || (os2->ulUnicodeRange3 & 1L << 3)) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_ARABIC);
				}
				if (os2->ulUnicodeRange1 & 1L << 14) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_NKO);
				}
				if (os2->ulUnicodeRange1 & 1L << 15) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_DEVANAGARI);
				}
				if (os2->ulUnicodeRange1 & 1L << 16) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_BENGALI);
				}
				if (os2->ulUnicodeRange1 & 1L << 17) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_GURMUKHI);
				}
				if (os2->ulUnicodeRange1 & 1L << 18) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_GUJARATI);
				}
				if (os2->ulUnicodeRange1 & 1L << 19) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_ORIYA);
				}
				if (os2->ulUnicodeRange1 & 1L << 20) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_TAMIL);
				}
				if (os2->ulUnicodeRange1 & 1L << 21) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_TELUGU);
				}
				if (os2->ulUnicodeRange1 & 1L << 22) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_KANNADA);
				}
				if (os2->ulUnicodeRange1 & 1L << 23) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_MALAYALAM);
				}
				if (os2->ulUnicodeRange1 & 1L << 24) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_THAI);
				}
				if (os2->ulUnicodeRange1 & 1L << 25) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_LAO);
				}
				if (os2->ulUnicodeRange1 & 1L << 26) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_GEORGIAN);
				}
				if (os2->ulUnicodeRange1 & 1L << 27) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_BALINESE);
				}
				if ((os2->ulUnicodeRange1 & 1L << 28) || (os2->ulUnicodeRange2 & 1L << 20) || (os2->ulUnicodeRange2 & 1L << 24)) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_HANGUL);
				}
				if ((os2->ulUnicodeRange2 & 1L << 21) || (os2->ulUnicodeRange2 & 1L << 22) || (os2->ulUnicodeRange2 & 1L << 23) || (os2->ulUnicodeRange2 & 1L << 26) || (os2->ulUnicodeRange2 & 1L << 27) || (os2->ulUnicodeRange2 & 1L << 29)) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_HAN);
				}
				if (os2->ulUnicodeRange2 & 1L << 17) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_HIRAGANA);
				}
				if (os2->ulUnicodeRange2 & 1L << 18) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_KATAKANA);
				}
				if (os2->ulUnicodeRange2 & 1L << 19) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_BOPOMOFO);
				}
				if (os2->ulUnicodeRange3 & 1L << 6) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_TIBETAN);
				}
				if (os2->ulUnicodeRange3 & 1L << 7) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_SYRIAC);
				}
				if (os2->ulUnicodeRange3 & 1L << 8) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_THAANA);
				}
				if (os2->ulUnicodeRange3 & 1L << 9) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_SINHALA);
				}
				if (os2->ulUnicodeRange3 & 1L << 10) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_MYANMAR);
				}
				if (os2->ulUnicodeRange3 & 1L << 11) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_ETHIOPIC);
				}
				if (os2->ulUnicodeRange3 & 1L << 12) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_CHEROKEE);
				}
				if (os2->ulUnicodeRange3 & 1L << 13) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_CANADIAN_SYLLABICS);
				}
				if (os2->ulUnicodeRange3 & 1L << 14) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_OGHAM);
				}
				if (os2->ulUnicodeRange3 & 1L << 15) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_RUNIC);
				}
				if (os2->ulUnicodeRange3 & 1L << 16) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_KHMER);
				}
				if (os2->ulUnicodeRange3 & 1L << 17) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_MONGOLIAN);
				}
				if (os2->ulUnicodeRange3 & 1L << 19) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_YI);
				}
				if (os2->ulUnicodeRange3 & 1L << 20) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_HANUNOO);
					p_font_data->supported_scripts.insert(HB_SCRIPT_TAGBANWA);
					p_font_data->supported_scripts.insert(HB_SCRIPT_BUHID);
					p_font_data->supported_scripts.insert(HB_SCRIPT_TAGALOG);
				}
				if (os2->ulUnicodeRange3 & 1L << 21) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_OLD_ITALIC);
				}
				if (os2->ulUnicodeRange3 & 1L << 22) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_GOTHIC);
				}
				if (os2->ulUnicodeRange3 & 1L << 23) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_DESERET);
				}
				if (os2->ulUnicodeRange3 & 1L << 29) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_LIMBU);
				}
				if (os2->ulUnicodeRange3 & 1L << 30) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_TAI_LE);
				}
				if (os2->ulUnicodeRange3 & 1L << 31) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_NEW_TAI_LUE);
				}
				if (os2->ulUnicodeRange4 & 1L << 0) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_BUGINESE);
				}
				if (os2->ulUnicodeRange4 & 1L << 1) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_GLAGOLITIC);
				}
				if (os2->ulUnicodeRange4 & 1L << 2) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_TIFINAGH);
				}
				if (os2->ulUnicodeRange4 & 1L << 4) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_SYLOTI_NAGRI);
				}
				if (os2->ulUnicodeRange4 & 1L << 5) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_LINEAR_B);
				}
				if (os2->ulUnicodeRange4 & 1L << 7) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_UGARITIC);
				}
				if (os2->ulUnicodeRange4 & 1L << 8) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_OLD_PERSIAN);
				}
				if (os2->ulUnicodeRange4 & 1L << 9) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_SHAVIAN);
				}
				if (os2->ulUnicodeRange4 & 1L << 10) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_OSMANYA);
				}
				if (os2->ulUnicodeRange4 & 1L << 11) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_CYPRIOT);
				}
				if (os2->ulUnicodeRange4 & 1L << 12) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_KHAROSHTHI);
				}
				if (os2->ulUnicodeRange4 & 1L << 13) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_TAI_VIET);
				}
				if (os2->ulUnicodeRange4 & 1L << 14) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_CUNEIFORM);
				}
				if (os2->ulUnicodeRange4 & 1L << 16) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_SUNDANESE);
				}
				if (os2->ulUnicodeRange4 & 1L << 17) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_LEPCHA);
				}
				if (os2->ulUnicodeRange4 & 1L << 18) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_OL_CHIKI);
				}
				if (os2->ulUnicodeRange4 & 1L << 19) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_SAURASHTRA);
				}
				if (os2->ulUnicodeRange4 & 1L << 20) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_KAYAH_LI);
				}
				if (os2->ulUnicodeRange4 & 1L << 21) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_REJANG);
				}
				if (os2->ulUnicodeRange4 & 1L << 22) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_CHAM);
				}
				if (os2->ulUnicodeRange4 & 1L << 25) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_ANATOLIAN_HIEROGLYPHS);
				}
			}

			// Read OpenType feature tags.
			p_font_data->supported_features.clear();
			count = hb_ot_layout_table_get_feature_tags(hb_font_get_face(fd->hb_handle), HB_OT_TAG_GSUB, 0, nullptr, nullptr);
			if (count != 0) {
				hb_tag_t *feature_tags = (hb_tag_t *)memalloc(count * sizeof(hb_tag_t));
				hb_ot_layout_table_get_feature_tags(hb_font_get_face(fd->hb_handle), HB_OT_TAG_GSUB, 0, &count, feature_tags);
				for (unsigned int i = 0; i < count; i++) {
					p_font_data->supported_features[feature_tags[i]] = 1;
				}
				memfree(feature_tags);
			}
			count = hb_ot_layout_table_get_feature_tags(hb_font_get_face(fd->hb_handle), HB_OT_TAG_GPOS, 0, nullptr, nullptr);
			if (count != 0) {
				hb_tag_t *feature_tags = (hb_tag_t *)memalloc(count * sizeof(hb_tag_t));
				hb_ot_layout_table_get_feature_tags(hb_font_get_face(fd->hb_handle), HB_OT_TAG_GPOS, 0, &count, feature_tags);
				for (unsigned int i = 0; i < count; i++) {
					p_font_data->supported_features[feature_tags[i]] = 1;
				}
				memfree(feature_tags);
			}

			// Read OpenType variations.
			p_font_data->supported_varaitions.clear();
			if (fd->face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS) {
				FT_MM_Var *amaster;
				FT_Get_MM_Var(fd->face, &amaster);
				for (FT_UInt i = 0; i < amaster->num_axis; i++) {
					p_font_data->supported_varaitions[(int32_t)amaster->axis[i].tag] = Vector3i(amaster->axis[i].minimum / 65536, amaster->axis[i].maximum / 65536, amaster->axis[i].def / 65536);
				}
				FT_Done_MM_Var(ft_library, amaster);
			}
			p_font_data->face_init = true;
		}

		// Write variations.
		if (fd->face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS) {
			FT_MM_Var *amaster;

			FT_Get_MM_Var(fd->face, &amaster);

			Vector<hb_variation_t> hb_vars;
			Vector<FT_Fixed> coords;
			coords.resize(amaster->num_axis);

			FT_Get_Var_Design_Coordinates(fd->face, coords.size(), coords.ptrw());

			for (FT_UInt i = 0; i < amaster->num_axis; i++) {
				hb_variation_t var;

				// Reset to default.
				var.tag = amaster->axis[i].tag;
				var.value = (double)amaster->axis[i].def / 65536.0;
				coords.write[i] = amaster->axis[i].def;

				if (p_font_data->variation_coordinates.has(var.tag)) {
					var.value = p_font_data->variation_coordinates[var.tag];
					coords.write[i] = CLAMP(var.value * 65536.0, amaster->axis[i].minimum, amaster->axis[i].maximum);
				}

				if (p_font_data->variation_coordinates.has(tag_to_name(var.tag))) {
					var.value = p_font_data->variation_coordinates[tag_to_name(var.tag)];
					coords.write[i] = CLAMP(var.value * 65536.0, amaster->axis[i].minimum, amaster->axis[i].maximum);
				}

				hb_vars.push_back(var);
			}

			FT_Set_Var_Design_Coordinates(fd->face, coords.size(), coords.ptrw());
			hb_font_set_variations(fd->hb_handle, hb_vars.is_empty() ? nullptr : &hb_vars[0], hb_vars.size());
			FT_Done_MM_Var(ft_library, amaster);
		}
#else
		ERR_FAIL_V_MSG(false, "FreeType: Can't load dynamic font, engine is compiled without FreeType support!");
#endif
	} else {
		// Init bitmap font.
		fd->hb_handle = _bmp_font_create(fd, nullptr);
	}
	p_font_data->cache[p_size] = fd;
	return true;
}

_FORCE_INLINE_ void TextServerAdvanced::_font_clear_cache(FontDataAdvanced *p_font_data) {
	for (const KeyValue<Vector2i, FontDataForSizeAdvanced *> &E : p_font_data->cache) {
		memdelete(E.value);
	}
	p_font_data->cache.clear();
	p_font_data->face_init = false;
	p_font_data->supported_features.clear();
	p_font_data->supported_varaitions.clear();
	p_font_data->supported_scripts.clear();
}

hb_font_t *TextServerAdvanced::_font_get_hb_handle(const RID &p_font_rid, int64_t p_size) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, nullptr);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), nullptr);

	return fd->cache[size]->hb_handle;
}

RID TextServerAdvanced::create_font() {
	FontDataAdvanced *fd = memnew(FontDataAdvanced);

	return font_owner.make_rid(fd);
}

void TextServerAdvanced::font_set_data(const RID &p_font_rid, const PackedByteArray &p_data) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	_font_clear_cache(fd);
	fd->data = p_data;
	fd->data_ptr = fd->data.ptr();
	fd->data_size = fd->data.size();
}

void TextServerAdvanced::font_set_data_ptr(const RID &p_font_rid, const uint8_t *p_data_ptr, int64_t p_data_size) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	_font_clear_cache(fd);
	fd->data.resize(0);
	fd->data_ptr = p_data_ptr;
	fd->data_size = p_data_size;
}

void TextServerAdvanced::font_set_style(const RID &p_font_rid, int64_t /*FontStyle*/ p_style) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, 16);
	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	fd->style_flags = p_style;
}

int64_t /*FontStyle*/ TextServerAdvanced::font_get_style(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, 0);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, 16);
	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), 0);
	return fd->style_flags;
}

void TextServerAdvanced::font_set_style_name(const RID &p_font_rid, const String &p_name) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, 16);
	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	fd->style_name = p_name;
}

String TextServerAdvanced::font_get_style_name(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, String());

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, 16);
	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), String());
	return fd->style_name;
}

void TextServerAdvanced::font_set_name(const RID &p_font_rid, const String &p_name) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, 16);
	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	fd->font_name = p_name;
}

String TextServerAdvanced::font_get_name(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, String());

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, 16);
	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), String());
	return fd->font_name;
}

void TextServerAdvanced::font_set_antialiased(const RID &p_font_rid, bool p_antialiased) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	if (fd->antialiased != p_antialiased) {
		_font_clear_cache(fd);
		fd->antialiased = p_antialiased;
	}
}

bool TextServerAdvanced::font_is_antialiased(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);

	MutexLock lock(fd->mutex);
	return fd->antialiased;
}

void TextServerAdvanced::font_set_multichannel_signed_distance_field(const RID &p_font_rid, bool p_msdf) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	if (fd->msdf != p_msdf) {
		_font_clear_cache(fd);
		fd->msdf = p_msdf;
	}
}

bool TextServerAdvanced::font_is_multichannel_signed_distance_field(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);

	MutexLock lock(fd->mutex);
	return fd->msdf;
}

void TextServerAdvanced::font_set_msdf_pixel_range(const RID &p_font_rid, int64_t p_msdf_pixel_range) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	if (fd->msdf_range != p_msdf_pixel_range) {
		_font_clear_cache(fd);
		fd->msdf_range = p_msdf_pixel_range;
	}
}

int64_t TextServerAdvanced::font_get_msdf_pixel_range(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);

	MutexLock lock(fd->mutex);
	return fd->msdf_range;
}

void TextServerAdvanced::font_set_msdf_size(const RID &p_font_rid, int64_t p_msdf_size) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	if (fd->msdf_source_size != p_msdf_size) {
		_font_clear_cache(fd);
		fd->msdf_source_size = p_msdf_size;
	}
}

int64_t TextServerAdvanced::font_get_msdf_size(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);

	MutexLock lock(fd->mutex);
	return fd->msdf_source_size;
}

void TextServerAdvanced::font_set_fixed_size(const RID &p_font_rid, int64_t p_fixed_size) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	if (fd->fixed_size != p_fixed_size) {
		fd->fixed_size = p_fixed_size;
	}
}

int64_t TextServerAdvanced::font_get_fixed_size(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);

	MutexLock lock(fd->mutex);
	return fd->fixed_size;
}

void TextServerAdvanced::font_set_force_autohinter(const RID &p_font_rid, bool p_force_autohinter) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	if (fd->force_autohinter != p_force_autohinter) {
		_font_clear_cache(fd);
		fd->force_autohinter = p_force_autohinter;
	}
}

bool TextServerAdvanced::font_is_force_autohinter(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);

	MutexLock lock(fd->mutex);
	return fd->force_autohinter;
}

void TextServerAdvanced::font_set_hinting(const RID &p_font_rid, TextServer::Hinting p_hinting) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	if (fd->hinting != p_hinting) {
		_font_clear_cache(fd);
		fd->hinting = p_hinting;
	}
}

TextServer::Hinting TextServerAdvanced::font_get_hinting(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, HINTING_NONE);

	MutexLock lock(fd->mutex);
	return fd->hinting;
}

void TextServerAdvanced::font_set_subpixel_positioning(const RID &p_font_rid, TextServer::SubpixelPositioning p_subpixel) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	if (fd->subpixel_positioning != p_subpixel) {
		fd->subpixel_positioning = p_subpixel;
	}
}

TextServer::SubpixelPositioning TextServerAdvanced::font_get_subpixel_positioning(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, SUBPIXEL_POSITIONING_DISABLED);

	MutexLock lock(fd->mutex);
	return fd->subpixel_positioning;
}

void TextServerAdvanced::font_set_embolden(const RID &p_font_rid, double p_strength) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	if (fd->embolden != p_strength) {
		_font_clear_cache(fd);
		fd->embolden = p_strength;
	}
}

double TextServerAdvanced::font_get_embolden(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, 0.0);

	MutexLock lock(fd->mutex);
	return fd->embolden;
}

void TextServerAdvanced::font_set_transform(const RID &p_font_rid, const Transform2D &p_transform) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	if (fd->transform != p_transform) {
		_font_clear_cache(fd);
		fd->transform = p_transform;
	}
}

Transform2D TextServerAdvanced::font_get_transform(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, Transform2D());

	MutexLock lock(fd->mutex);
	return fd->transform;
}

void TextServerAdvanced::font_set_variation_coordinates(const RID &p_font_rid, const Dictionary &p_variation_coordinates) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	if (fd->variation_coordinates != p_variation_coordinates) {
		_font_clear_cache(fd);
		fd->variation_coordinates = p_variation_coordinates;
	}
}

Dictionary TextServerAdvanced::font_get_variation_coordinates(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, Dictionary());

	MutexLock lock(fd->mutex);
	return fd->variation_coordinates;
}

void TextServerAdvanced::font_set_oversampling(const RID &p_font_rid, double p_oversampling) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	if (fd->oversampling != p_oversampling) {
		_font_clear_cache(fd);
		fd->oversampling = p_oversampling;
	}
}

double TextServerAdvanced::font_get_oversampling(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, 0.0);

	MutexLock lock(fd->mutex);
	return fd->oversampling;
}

Array TextServerAdvanced::font_get_size_cache_list(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, Array());

	MutexLock lock(fd->mutex);
	Array ret;
	for (const KeyValue<Vector2i, FontDataForSizeAdvanced *> &E : fd->cache) {
		ret.push_back(E.key);
	}
	return ret;
}

void TextServerAdvanced::font_clear_size_cache(const RID &p_font_rid) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	for (const KeyValue<Vector2i, FontDataForSizeAdvanced *> &E : fd->cache) {
		memdelete(E.value);
	}
	fd->cache.clear();
}

void TextServerAdvanced::font_remove_size_cache(const RID &p_font_rid, const Vector2i &p_size) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	if (fd->cache.has(p_size)) {
		memdelete(fd->cache[p_size]);
		fd->cache.erase(p_size);
	}
}

void TextServerAdvanced::font_set_ascent(const RID &p_font_rid, int64_t p_size, double p_ascent) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	fd->cache[size]->ascent = p_ascent;
}

double TextServerAdvanced::font_get_ascent(const RID &p_font_rid, int64_t p_size) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, 0.0);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), 0.0);

	if (fd->msdf) {
		return fd->cache[size]->ascent * (double)p_size / (double)fd->msdf_source_size;
	} else {
		return fd->cache[size]->ascent;
	}
}

void TextServerAdvanced::font_set_descent(const RID &p_font_rid, int64_t p_size, double p_descent) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	fd->cache[size]->descent = p_descent;
}

double TextServerAdvanced::font_get_descent(const RID &p_font_rid, int64_t p_size) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, 0.0);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), 0.0);

	if (fd->msdf) {
		return fd->cache[size]->descent * (double)p_size / (double)fd->msdf_source_size;
	} else {
		return fd->cache[size]->descent;
	}
}

void TextServerAdvanced::font_set_underline_position(const RID &p_font_rid, int64_t p_size, double p_underline_position) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	fd->cache[size]->underline_position = p_underline_position;
}

double TextServerAdvanced::font_get_underline_position(const RID &p_font_rid, int64_t p_size) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, 0.0);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), 0.0);

	if (fd->msdf) {
		return fd->cache[size]->underline_position * (double)p_size / (double)fd->msdf_source_size;
	} else {
		return fd->cache[size]->underline_position;
	}
}

void TextServerAdvanced::font_set_underline_thickness(const RID &p_font_rid, int64_t p_size, double p_underline_thickness) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	fd->cache[size]->underline_thickness = p_underline_thickness;
}

double TextServerAdvanced::font_get_underline_thickness(const RID &p_font_rid, int64_t p_size) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, 0.0);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), 0.0);

	if (fd->msdf) {
		return fd->cache[size]->underline_thickness * (double)p_size / (double)fd->msdf_source_size;
	} else {
		return fd->cache[size]->underline_thickness;
	}
}

void TextServerAdvanced::font_set_scale(const RID &p_font_rid, int64_t p_size, double p_scale) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	fd->cache[size]->scale = p_scale;
}

double TextServerAdvanced::font_get_scale(const RID &p_font_rid, int64_t p_size) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, 0.0);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), 0.0);

	if (fd->msdf) {
		return fd->cache[size]->scale * (double)p_size / (double)fd->msdf_source_size;
	} else {
		return fd->cache[size]->scale / fd->cache[size]->oversampling;
	}
}

void TextServerAdvanced::font_set_spacing(const RID &p_font_rid, int64_t p_size, TextServer::SpacingType p_spacing, int64_t p_value) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	switch (p_spacing) {
		case TextServer::SPACING_GLYPH: {
			fd->cache[size]->spacing_glyph = p_value;
		} break;
		case TextServer::SPACING_SPACE: {
			fd->cache[size]->spacing_space = p_value;
		} break;
		default: {
			ERR_FAIL_MSG("Invalid spacing type: " + String::num_int64(p_spacing));
		} break;
	}
}

int64_t TextServerAdvanced::font_get_spacing(const RID &p_font_rid, int64_t p_size, TextServer::SpacingType p_spacing) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, 0);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), 0);

	switch (p_spacing) {
		case TextServer::SPACING_GLYPH: {
			if (fd->msdf) {
				return fd->cache[size]->spacing_glyph * (double)p_size / (double)fd->msdf_source_size;
			} else {
				return fd->cache[size]->spacing_glyph;
			}
		} break;
		case TextServer::SPACING_SPACE: {
			if (fd->msdf) {
				return fd->cache[size]->spacing_space * (double)p_size / (double)fd->msdf_source_size;
			} else {
				return fd->cache[size]->spacing_space;
			}
		} break;
		default: {
			ERR_FAIL_V_MSG(0, "Invalid spacing type: " + String::num_int64(p_spacing));
		} break;
	}
	return 0;
}

int64_t TextServerAdvanced::font_get_texture_count(const RID &p_font_rid, const Vector2i &p_size) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, 0);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);

	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), 0);

	return fd->cache[size]->textures.size();
}

void TextServerAdvanced::font_clear_textures(const RID &p_font_rid, const Vector2i &p_size) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);
	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);

	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	fd->cache[size]->textures.clear();
}

void TextServerAdvanced::font_remove_texture(const RID &p_font_rid, const Vector2i &p_size, int64_t p_texture_index) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);
	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	ERR_FAIL_INDEX(p_texture_index, fd->cache[size]->textures.size());

	fd->cache[size]->textures.remove_at(p_texture_index);
}

void TextServerAdvanced::font_set_texture_image(const RID &p_font_rid, const Vector2i &p_size, int64_t p_texture_index, const Ref<Image> &p_image) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);
	ERR_FAIL_COND(p_image.is_null());

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);
	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	ERR_FAIL_COND(p_texture_index < 0);
	if (p_texture_index >= fd->cache[size]->textures.size()) {
		fd->cache[size]->textures.resize(p_texture_index + 1);
	}

	FontTexture &tex = fd->cache[size]->textures.write[p_texture_index];

	tex.imgdata = p_image->get_data();
	tex.texture_w = p_image->get_width();
	tex.texture_h = p_image->get_height();
	tex.format = p_image->get_format();

	Ref<Image> img;
	img.instantiate();
	img->create_from_data(tex.texture_w, tex.texture_h, 0, tex.format, tex.imgdata);

	tex.texture = Ref<ImageTexture>();
	tex.texture.instantiate();
	tex.texture->create_from_image(img);
}

Ref<Image> TextServerAdvanced::font_get_texture_image(const RID &p_font_rid, const Vector2i &p_size, int64_t p_texture_index) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, Ref<Image>());

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);
	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Ref<Image>());
	ERR_FAIL_INDEX_V(p_texture_index, fd->cache[size]->textures.size(), Ref<Image>());

	const FontTexture &tex = fd->cache[size]->textures[p_texture_index];
	Ref<Image> img;
	img.instantiate();
	img->create_from_data(tex.texture_w, tex.texture_h, 0, tex.format, tex.imgdata);

	return img;
}

void TextServerAdvanced::font_set_texture_offsets(const RID &p_font_rid, const Vector2i &p_size, int64_t p_texture_index, const PackedInt32Array &p_offset) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);
	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	ERR_FAIL_COND(p_texture_index < 0);
	if (p_texture_index >= fd->cache[size]->textures.size()) {
		fd->cache[size]->textures.resize(p_texture_index + 1);
	}

	FontTexture &tex = fd->cache[size]->textures.write[p_texture_index];
	tex.offsets = p_offset;
}

PackedInt32Array TextServerAdvanced::font_get_texture_offsets(const RID &p_font_rid, const Vector2i &p_size, int64_t p_texture_index) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, PackedInt32Array());

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);
	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), PackedInt32Array());
	ERR_FAIL_INDEX_V(p_texture_index, fd->cache[size]->textures.size(), PackedInt32Array());

	const FontTexture &tex = fd->cache[size]->textures[p_texture_index];
	return tex.offsets;
}

Array TextServerAdvanced::font_get_glyph_list(const RID &p_font_rid, const Vector2i &p_size) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, Array());

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);
	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Array());

	Array ret;
	const HashMap<int32_t, FontGlyph> &gl = fd->cache[size]->glyph_map;
	const int32_t *E = nullptr;
	while ((E = gl.next(E))) {
		ret.push_back(*E);
	}
	return ret;
}

void TextServerAdvanced::font_clear_glyphs(const RID &p_font_rid, const Vector2i &p_size) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);
	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));

	fd->cache[size]->glyph_map.clear();
}

void TextServerAdvanced::font_remove_glyph(const RID &p_font_rid, const Vector2i &p_size, int64_t p_glyph) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);
	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));

	fd->cache[size]->glyph_map.erase(p_glyph);
}

double TextServerAdvanced::_get_extra_advance(RID p_font_rid, int p_font_size) const {
	const FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, 0.0);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_font_size);

	if (fd->embolden != 0.0) {
		return fd->embolden * double(size.x) / 64.0;
	} else {
		return 0.0;
	}
}

Vector2 TextServerAdvanced::font_get_glyph_advance(const RID &p_font_rid, int64_t p_size, int64_t p_glyph) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, Vector2());

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Vector2());
	if (!_ensure_glyph(fd, size, p_glyph)) {
		return Vector2(); // Invalid or non graphicl glyph, do not display errors.
	}

	const HashMap<int32_t, FontGlyph> &gl = fd->cache[size]->glyph_map;

	Vector2 ea;
	if (fd->embolden != 0.0) {
		ea.x = fd->embolden * double(size.x) / 64.0;
	}

	if (fd->msdf) {
		return (gl[p_glyph].advance + ea) * (double)p_size / (double)fd->msdf_source_size;
	} else if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_DISABLED) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x > SUBPIXEL_POSITIONING_ONE_HALF_MAX_SIZE)) {
		return (gl[p_glyph].advance + ea).round();
	} else {
		return gl[p_glyph].advance + ea;
	}
}

void TextServerAdvanced::font_set_glyph_advance(const RID &p_font_rid, int64_t p_size, int64_t p_glyph, const Vector2 &p_advance) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));

	HashMap<int32_t, FontGlyph> &gl = fd->cache[size]->glyph_map;

	gl[p_glyph].advance = p_advance;
	gl[p_glyph].found = true;
}

Vector2 TextServerAdvanced::font_get_glyph_offset(const RID &p_font_rid, const Vector2i &p_size, int64_t p_glyph) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, Vector2());

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);

	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Vector2());
	if (!_ensure_glyph(fd, size, p_glyph)) {
		return Vector2(); // Invalid or non graphicl glyph, do not display errors.
	}

	const HashMap<int32_t, FontGlyph> &gl = fd->cache[size]->glyph_map;

	if (fd->msdf) {
		return gl[p_glyph].rect.position * (double)p_size.x / (double)fd->msdf_source_size;
	} else {
		return gl[p_glyph].rect.position;
	}
}

void TextServerAdvanced::font_set_glyph_offset(const RID &p_font_rid, const Vector2i &p_size, int64_t p_glyph, const Vector2 &p_offset) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);

	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));

	HashMap<int32_t, FontGlyph> &gl = fd->cache[size]->glyph_map;

	gl[p_glyph].rect.position = p_offset;
	gl[p_glyph].found = true;
}

Vector2 TextServerAdvanced::font_get_glyph_size(const RID &p_font_rid, const Vector2i &p_size, int64_t p_glyph) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, Vector2());

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);

	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Vector2());
	if (!_ensure_glyph(fd, size, p_glyph)) {
		return Vector2(); // Invalid or non graphicl glyph, do not display errors.
	}

	const HashMap<int32_t, FontGlyph> &gl = fd->cache[size]->glyph_map;

	if (fd->msdf) {
		return gl[p_glyph].rect.size * (double)p_size.x / (double)fd->msdf_source_size;
	} else {
		return gl[p_glyph].rect.size;
	}
}

void TextServerAdvanced::font_set_glyph_size(const RID &p_font_rid, const Vector2i &p_size, int64_t p_glyph, const Vector2 &p_gl_size) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);

	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));

	HashMap<int32_t, FontGlyph> &gl = fd->cache[size]->glyph_map;

	gl[p_glyph].rect.size = p_gl_size;
	gl[p_glyph].found = true;
}

Rect2 TextServerAdvanced::font_get_glyph_uv_rect(const RID &p_font_rid, const Vector2i &p_size, int64_t p_glyph) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, Rect2());

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);

	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Rect2());
	if (!_ensure_glyph(fd, size, p_glyph)) {
		return Rect2(); // Invalid or non graphicl glyph, do not display errors.
	}

	const HashMap<int32_t, FontGlyph> &gl = fd->cache[size]->glyph_map;
	return gl[p_glyph].uv_rect;
}

void TextServerAdvanced::font_set_glyph_uv_rect(const RID &p_font_rid, const Vector2i &p_size, int64_t p_glyph, const Rect2 &p_uv_rect) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);

	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));

	HashMap<int32_t, FontGlyph> &gl = fd->cache[size]->glyph_map;

	gl[p_glyph].uv_rect = p_uv_rect;
	gl[p_glyph].found = true;
}

int64_t TextServerAdvanced::font_get_glyph_texture_idx(const RID &p_font_rid, const Vector2i &p_size, int64_t p_glyph) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, -1);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);

	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), -1);
	if (!_ensure_glyph(fd, size, p_glyph)) {
		return -1; // Invalid or non graphicl glyph, do not display errors.
	}

	const HashMap<int32_t, FontGlyph> &gl = fd->cache[size]->glyph_map;
	return gl[p_glyph].texture_idx;
}

void TextServerAdvanced::font_set_glyph_texture_idx(const RID &p_font_rid, const Vector2i &p_size, int64_t p_glyph, int64_t p_texture_idx) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);

	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));

	HashMap<int32_t, FontGlyph> &gl = fd->cache[size]->glyph_map;

	gl[p_glyph].texture_idx = p_texture_idx;
	gl[p_glyph].found = true;
}

Dictionary TextServerAdvanced::font_get_glyph_contours(const RID &p_font_rid, int64_t p_size, int64_t p_index) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, Dictionary());

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Dictionary());

	PackedVector3Array points;
	PackedInt32Array contours;
	bool orientation;
#ifdef MODULE_FREETYPE_ENABLED
	int32_t index = p_index & 0xffffff; // Remove subpixel shifts.

	int error = FT_Load_Glyph(fd->cache[size]->face, index, FT_LOAD_NO_BITMAP | (fd->force_autohinter ? FT_LOAD_FORCE_AUTOHINT : 0));
	ERR_FAIL_COND_V(error, Dictionary());

	double h = fd->cache[size]->ascent;
	double scale = (1.0 / 64.0) / fd->cache[size]->oversampling * fd->cache[size]->scale;
	if (fd->msdf) {
		scale = scale * (double)p_size / (double)fd->msdf_source_size;
	}
	for (short i = 0; i < fd->cache[size]->face->glyph->outline.n_points; i++) {
		points.push_back(Vector3(fd->cache[size]->face->glyph->outline.points[i].x * scale, h - fd->cache[size]->face->glyph->outline.points[i].y * scale, FT_CURVE_TAG(fd->cache[size]->face->glyph->outline.tags[i])));
	}
	for (short i = 0; i < fd->cache[size]->face->glyph->outline.n_contours; i++) {
		contours.push_back(fd->cache[size]->face->glyph->outline.contours[i]);
	}
	orientation = (FT_Outline_Get_Orientation(&fd->cache[size]->face->glyph->outline) == FT_ORIENTATION_FILL_RIGHT);
#else
	return Dictionary();
#endif

	Dictionary out;
	out["points"] = points;
	out["contours"] = contours;
	out["orientation"] = orientation;
	return out;
}

Array TextServerAdvanced::font_get_kerning_list(const RID &p_font_rid, int64_t p_size) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, Array());

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Array());

	Array ret;
	for (const KeyValue<Vector2i, FontDataForSizeAdvanced *> &E : fd->cache) {
		ret.push_back(E.key);
	}
	return ret;
}

void TextServerAdvanced::font_clear_kerning_map(const RID &p_font_rid, int64_t p_size) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	fd->cache[size]->kerning_map.clear();
}

void TextServerAdvanced::font_remove_kerning(const RID &p_font_rid, int64_t p_size, const Vector2i &p_glyph_pair) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	fd->cache[size]->kerning_map.erase(p_glyph_pair);
}

void TextServerAdvanced::font_set_kerning(const RID &p_font_rid, int64_t p_size, const Vector2i &p_glyph_pair, const Vector2 &p_kerning) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	fd->cache[size]->kerning_map[p_glyph_pair] = p_kerning;
}

Vector2 TextServerAdvanced::font_get_kerning(const RID &p_font_rid, int64_t p_size, const Vector2i &p_glyph_pair) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, Vector2());

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);

	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Vector2());

	const Map<Vector2i, Vector2> &kern = fd->cache[size]->kerning_map;

	if (kern.has(p_glyph_pair)) {
		if (fd->msdf) {
			return kern[p_glyph_pair] * (double)p_size / (double)fd->msdf_source_size;
		} else {
			return kern[p_glyph_pair];
		}
	} else {
#ifdef MODULE_FREETYPE_ENABLED
		if (fd->cache[size]->face) {
			FT_Vector delta;
			FT_Get_Kerning(fd->cache[size]->face, p_glyph_pair.x, p_glyph_pair.y, FT_KERNING_DEFAULT, &delta);
			if (fd->msdf) {
				return Vector2(delta.x, delta.y) * (double)p_size / (double)fd->msdf_source_size;
			} else {
				return Vector2(delta.x, delta.y);
			}
		}
#endif
	}
	return Vector2();
}

int64_t TextServerAdvanced::font_get_glyph_index(const RID &p_font_rid, int64_t p_size, int64_t p_char, int64_t p_variation_selector) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, 0);
	ERR_FAIL_COND_V_MSG((p_char >= 0xd800 && p_char <= 0xdfff) || (p_char > 0x10ffff), 0, "Unicode parsing error: Invalid unicode codepoint " + String::num_int64(p_char, 16) + ".");
	ERR_FAIL_COND_V_MSG((p_variation_selector >= 0xd800 && p_variation_selector <= 0xdfff) || (p_variation_selector > 0x10ffff), 0, "Unicode parsing error: Invalid unicode codepoint " + String::num_int64(p_variation_selector, 16) + ".");

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);
	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), 0);

#ifdef MODULE_FREETYPE_ENABLED
	if (fd->cache[size]->face) {
		if (p_variation_selector) {
			return FT_Face_GetCharVariantIndex(fd->cache[size]->face, p_char, p_variation_selector);
		} else {
			return FT_Get_Char_Index(fd->cache[size]->face, p_char);
		}
	} else {
		return (int64_t)p_char;
	}
#else
	return (int64_t)p_char;
#endif
}

bool TextServerAdvanced::font_has_char(const RID &p_font_rid, int64_t p_char) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);
	ERR_FAIL_COND_V_MSG((p_char >= 0xd800 && p_char <= 0xdfff) || (p_char > 0x10ffff), false, "Unicode parsing error: Invalid unicode codepoint " + String::num_int64(p_char, 16) + ".");

	MutexLock lock(fd->mutex);
	if (fd->cache.is_empty()) {
		ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, fd->msdf ? Vector2i(fd->msdf_source_size, 0) : Vector2i(16, 0)), false);
	}
	FontDataForSizeAdvanced *at_size = fd->cache.front()->get();

#ifdef MODULE_FREETYPE_ENABLED
	if (at_size && at_size->face) {
		return FT_Get_Char_Index(at_size->face, p_char) != 0;
	}
#endif
	return (at_size) ? at_size->glyph_map.has((int32_t)p_char) : false;
}

String TextServerAdvanced::font_get_supported_chars(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, String());

	MutexLock lock(fd->mutex);
	if (fd->cache.is_empty()) {
		ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, fd->msdf ? Vector2i(fd->msdf_source_size, 0) : Vector2i(16, 0)), String());
	}
	FontDataForSizeAdvanced *at_size = fd->cache.front()->get();

	String chars;
#ifdef MODULE_FREETYPE_ENABLED
	if (at_size && at_size->face) {
		FT_UInt gindex;
		FT_ULong charcode = FT_Get_First_Char(at_size->face, &gindex);
		while (gindex != 0) {
			if (charcode != 0) {
				chars = chars + String::chr(charcode);
			}
			charcode = FT_Get_Next_Char(at_size->face, charcode, &gindex);
		}
		return chars;
	}
#endif
	if (at_size) {
		const HashMap<int32_t, FontGlyph> &gl = at_size->glyph_map;
		const int32_t *E = nullptr;
		while ((E = gl.next(E))) {
			chars = chars + String::chr(*E);
		}
	}
	return chars;
}

void TextServerAdvanced::font_render_range(const RID &p_font_rid, const Vector2i &p_size, int64_t p_start, int64_t p_end) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);
	ERR_FAIL_COND_MSG((p_start >= 0xd800 && p_start <= 0xdfff) || (p_start > 0x10ffff), "Unicode parsing error: Invalid unicode codepoint " + String::num_int64(p_start, 16) + ".");
	ERR_FAIL_COND_MSG((p_end >= 0xd800 && p_end <= 0xdfff) || (p_end > 0x10ffff), "Unicode parsing error: Invalid unicode codepoint " + String::num_int64(p_end, 16) + ".");

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);
	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	for (int64_t i = p_start; i <= p_end; i++) {
#ifdef MODULE_FREETYPE_ENABLED
		int32_t idx = FT_Get_Char_Index(fd->cache[size]->face, i);
		if (fd->cache[size]->face) {
			if (fd->msdf) {
				_ensure_glyph(fd, size, (int32_t)idx);
			} else {
				if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_QUARTER) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_QUARTER_MAX_SIZE)) {
					_ensure_glyph(fd, size, (int32_t)idx | (0 << 27));
					_ensure_glyph(fd, size, (int32_t)idx | (1 << 27));
					_ensure_glyph(fd, size, (int32_t)idx | (2 << 27));
					_ensure_glyph(fd, size, (int32_t)idx | (3 << 27));
				} else if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_HALF) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_HALF_MAX_SIZE)) {
					_ensure_glyph(fd, size, (int32_t)idx | (1 << 27));
					_ensure_glyph(fd, size, (int32_t)idx | (0 << 27));
				} else {
					_ensure_glyph(fd, size, (int32_t)idx);
				}
			}
		}
#endif
	}
}

void TextServerAdvanced::font_render_glyph(const RID &p_font_rid, const Vector2i &p_size, int64_t p_index) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);
	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
#ifdef MODULE_FREETYPE_ENABLED
	int32_t idx = p_index & 0xffffff; // Remove subpixel shifts.
	if (fd->cache[size]->face) {
		if (fd->msdf) {
			_ensure_glyph(fd, size, (int32_t)idx);
		} else {
			if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_QUARTER) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_QUARTER_MAX_SIZE)) {
				_ensure_glyph(fd, size, (int32_t)idx | (0 << 27));
				_ensure_glyph(fd, size, (int32_t)idx | (1 << 27));
				_ensure_glyph(fd, size, (int32_t)idx | (2 << 27));
				_ensure_glyph(fd, size, (int32_t)idx | (3 << 27));
			} else if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_HALF) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_HALF_MAX_SIZE)) {
				_ensure_glyph(fd, size, (int32_t)idx | (1 << 27));
				_ensure_glyph(fd, size, (int32_t)idx | (0 << 27));
			} else {
				_ensure_glyph(fd, size, (int32_t)idx);
			}
		}
	}
#endif
}

void TextServerAdvanced::font_draw_glyph(const RID &p_font_rid, const RID &p_canvas, int64_t p_size, const Vector2 &p_pos, int64_t p_index, const Color &p_color) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);
	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));

	int32_t index = p_index & 0xffffff; // Remove subpixel shifts.

#ifdef MODULE_FREETYPE_ENABLED
	if (!fd->msdf && fd->cache[size]->face) {
		if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_QUARTER) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_QUARTER_MAX_SIZE)) {
			int xshift = (int)(Math::floor(4 * (p_pos.x + 0.125)) - 4 * Math::floor(p_pos.x + 0.125));
			index = index | (xshift << 27);
		} else if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_HALF) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_HALF_MAX_SIZE)) {
			int xshift = (int)(Math::floor(2 * (p_pos.x + 0.25)) - 2 * Math::floor(p_pos.x + 0.25));
			index = index | (xshift << 27);
		}
	}
#endif

	if (!_ensure_glyph(fd, size, index)) {
		return; // Invalid or non-graphical glyph, do not display errors, nothing to draw.
	}

	const FontGlyph &gl = fd->cache[size]->glyph_map[index];
	if (gl.found) {
		ERR_FAIL_COND(gl.texture_idx < -1 || gl.texture_idx >= fd->cache[size]->textures.size());

		if (gl.texture_idx != -1) {
			Color modulate = p_color;
#ifdef MODULE_FREETYPE_ENABLED
			if (fd->cache[size]->face && FT_HAS_COLOR(fd->cache[size]->face)) {
				modulate.r = modulate.g = modulate.b = 1.0;
			}
#endif
			if (RenderingServer::get_singleton() != nullptr) {
				RID texture = fd->cache[size]->textures[gl.texture_idx].texture->get_rid();
				if (fd->msdf) {
					Point2 cpos = p_pos;
					cpos += gl.rect.position * (double)p_size / (double)fd->msdf_source_size;
					Size2 csize = gl.rect.size * (double)p_size / (double)fd->msdf_source_size;
					RenderingServer::get_singleton()->canvas_item_add_msdf_texture_rect_region(p_canvas, Rect2(cpos, csize), texture, gl.uv_rect, modulate, 0, fd->msdf_range);
				} else {
					Point2 cpos = p_pos;
					cpos.y = Math::floor(cpos.y);
					if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_QUARTER) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_QUARTER_MAX_SIZE)) {
						cpos.x = ((int)Math::floor(cpos.x + 0.125));
					} else if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_HALF) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_HALF_MAX_SIZE)) {
						cpos.x = ((int)Math::floor(cpos.x + 0.25));
					} else {
						cpos.x = Math::floor(cpos.x);
					}
					cpos += gl.rect.position;
					Size2 csize = gl.rect.size;
					RenderingServer::get_singleton()->canvas_item_add_texture_rect_region(p_canvas, Rect2(cpos, csize), texture, gl.uv_rect, modulate, false, false);
				}
			}
		}
	}
}

void TextServerAdvanced::font_draw_glyph_outline(const RID &p_font_rid, const RID &p_canvas, int64_t p_size, int64_t p_outline_size, const Vector2 &p_pos, int64_t p_index, const Color &p_color) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, Vector2i(p_size, p_outline_size));
	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));

	int32_t index = p_index & 0xffffff; // Remove subpixel shifts.

#ifdef MODULE_FREETYPE_ENABLED
	if (!fd->msdf && fd->cache[size]->face) {
		if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_QUARTER) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_QUARTER_MAX_SIZE)) {
			int xshift = (int)(Math::floor(4 * (p_pos.x + 0.125)) - 4 * Math::floor(p_pos.x + 0.125));
			index = index | (xshift << 27);
		} else if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_HALF) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_HALF_MAX_SIZE)) {
			int xshift = (int)(Math::floor(2 * (p_pos.x + 0.25)) - 2 * Math::floor(p_pos.x + 0.25));
			index = index | (xshift << 27);
		}
	}
#endif

	if (!_ensure_glyph(fd, size, index)) {
		return; // Invalid or non-graphical glyph, do not display errors, nothing to draw.
	}

	const FontGlyph &gl = fd->cache[size]->glyph_map[index];
	if (gl.found) {
		ERR_FAIL_COND(gl.texture_idx < -1 || gl.texture_idx >= fd->cache[size]->textures.size());

		if (gl.texture_idx != -1) {
			Color modulate = p_color;
#ifdef MODULE_FREETYPE_ENABLED
			if (fd->cache[size]->face && FT_HAS_COLOR(fd->cache[size]->face)) {
				modulate.r = modulate.g = modulate.b = 1.0;
			}
#endif
			if (RenderingServer::get_singleton() != nullptr) {
				RID texture = fd->cache[size]->textures[gl.texture_idx].texture->get_rid();
				if (fd->msdf) {
					Point2 cpos = p_pos;
					cpos += gl.rect.position * (double)p_size / (double)fd->msdf_source_size;
					Size2 csize = gl.rect.size * (double)p_size / (double)fd->msdf_source_size;
					RenderingServer::get_singleton()->canvas_item_add_msdf_texture_rect_region(p_canvas, Rect2(cpos, csize), texture, gl.uv_rect, modulate, p_outline_size * 2, fd->msdf_range);
				} else {
					Point2 cpos = p_pos;
					cpos.y = Math::floor(cpos.y);
					if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_QUARTER) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_QUARTER_MAX_SIZE)) {
						cpos.x = ((int)Math::floor(cpos.x + 0.125));
					} else if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_HALF) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_HALF_MAX_SIZE)) {
						cpos.x = ((int)Math::floor(cpos.x + 0.25));
					} else {
						cpos.x = Math::floor(cpos.x);
					}
					cpos += gl.rect.position;
					Size2 csize = gl.rect.size;
					RenderingServer::get_singleton()->canvas_item_add_texture_rect_region(p_canvas, Rect2(cpos, csize), texture, gl.uv_rect, modulate, false, false);
				}
			}
		}
	}
}

bool TextServerAdvanced::font_is_language_supported(const RID &p_font_rid, const String &p_language) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);

	MutexLock lock(fd->mutex);
	if (fd->language_support_overrides.has(p_language)) {
		return fd->language_support_overrides[p_language];
	} else {
		return true;
	}
}

void TextServerAdvanced::font_set_language_support_override(const RID &p_font_rid, const String &p_language, bool p_supported) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	fd->language_support_overrides[p_language] = p_supported;
}

bool TextServerAdvanced::font_get_language_support_override(const RID &p_font_rid, const String &p_language) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);

	MutexLock lock(fd->mutex);
	return fd->language_support_overrides[p_language];
}

void TextServerAdvanced::font_remove_language_support_override(const RID &p_font_rid, const String &p_language) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	fd->language_support_overrides.erase(p_language);
}

PackedStringArray TextServerAdvanced::font_get_language_support_overrides(const RID &p_font_rid) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, PackedStringArray());

	MutexLock lock(fd->mutex);
	PackedStringArray out;
	for (const KeyValue<String, bool> &E : fd->language_support_overrides) {
		out.push_back(E.key);
	}
	return out;
}

bool TextServerAdvanced::font_is_script_supported(const RID &p_font_rid, const String &p_script) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);

	MutexLock lock(fd->mutex);
	if (fd->script_support_overrides.has(p_script)) {
		return fd->script_support_overrides[p_script];
	} else {
		Vector2i size = _get_size(fd, 16);
		ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), false);
		return fd->supported_scripts.has(hb_tag_from_string(p_script.ascii().get_data(), -1));
	}
}

void TextServerAdvanced::font_set_script_support_override(const RID &p_font_rid, const String &p_script, bool p_supported) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	fd->script_support_overrides[p_script] = p_supported;
}

bool TextServerAdvanced::font_get_script_support_override(const RID &p_font_rid, const String &p_script) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);

	MutexLock lock(fd->mutex);
	return fd->script_support_overrides[p_script];
}

void TextServerAdvanced::font_remove_script_support_override(const RID &p_font_rid, const String &p_script) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	fd->script_support_overrides.erase(p_script);
}

PackedStringArray TextServerAdvanced::font_get_script_support_overrides(const RID &p_font_rid) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, PackedStringArray());

	MutexLock lock(fd->mutex);
	PackedStringArray out;
	for (const KeyValue<String, bool> &E : fd->script_support_overrides) {
		out.push_back(E.key);
	}
	return out;
}

void TextServerAdvanced::font_set_opentype_feature_overrides(const RID &p_font_rid, const Dictionary &p_overrides) {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, 16);
	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	fd->feature_overrides = p_overrides;
}

Dictionary TextServerAdvanced::font_get_opentype_feature_overrides(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, Dictionary());

	MutexLock lock(fd->mutex);
	return fd->feature_overrides;
}

Dictionary TextServerAdvanced::font_supported_feature_list(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, Dictionary());

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, 16);
	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Dictionary());
	return fd->supported_features;
}

Dictionary TextServerAdvanced::font_supported_variation_list(const RID &p_font_rid) const {
	FontDataAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, Dictionary());

	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, 16);
	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Dictionary());
	return fd->supported_varaitions;
}

double TextServerAdvanced::font_get_global_oversampling() const {
	return oversampling;
}

void TextServerAdvanced::font_set_global_oversampling(double p_oversampling) {
	_THREAD_SAFE_METHOD_
	if (oversampling != p_oversampling) {
		oversampling = p_oversampling;
		List<RID> fonts;
		font_owner.get_owned_list(&fonts);
		bool font_cleared = false;
		for (const RID &E : fonts) {
			if (!font_is_multichannel_signed_distance_field(E) && font_get_oversampling(E) <= 0) {
				font_clear_size_cache(E);
				font_cleared = true;
			}
		}

		if (font_cleared) {
			List<RID> text_bufs;
			shaped_owner.get_owned_list(&text_bufs);
			for (const RID &E : text_bufs) {
				invalidate(shaped_owner.get_or_null(E), false);
			}
		}
	}
}

/*************************************************************************/
/* Shaped text buffer interface                                          */
/*************************************************************************/

int64_t TextServerAdvanced::_convert_pos(const ShapedTextDataAdvanced *p_sd, int64_t p_pos) const {
	int64_t limit = p_pos;
	if (p_sd->text.length() != p_sd->utf16.length()) {
		const UChar *data = p_sd->utf16.get_data();
		for (int i = 0; i < p_pos; i++) {
			if (U16_IS_LEAD(data[i])) {
				limit--;
			}
		}
	}
	return limit;
}

int64_t TextServerAdvanced::_convert_pos_inv(const ShapedTextDataAdvanced *p_sd, int64_t p_pos) const {
	int64_t limit = p_pos;
	if (p_sd->text.length() != p_sd->utf16.length()) {
		for (int i = 0; i < p_pos; i++) {
			if (p_sd->text[i] > 0xffff) {
				limit++;
			}
		}
	}
	return limit;
}

void TextServerAdvanced::invalidate(TextServerAdvanced::ShapedTextDataAdvanced *p_shaped, bool p_text) {
	p_shaped->valid = false;
	p_shaped->sort_valid = false;
	p_shaped->line_breaks_valid = false;
	p_shaped->justification_ops_valid = false;
	p_shaped->text_trimmed = false;
	p_shaped->ascent = 0.0;
	p_shaped->descent = 0.0;
	p_shaped->width = 0.0;
	p_shaped->upos = 0.0;
	p_shaped->uthk = 0.0;
	p_shaped->glyphs.clear();
	p_shaped->glyphs_logical.clear();
	p_shaped->overrun_trim_data = TrimData();
	p_shaped->utf16 = Char16String();
	for (int i = 0; i < p_shaped->bidi_iter.size(); i++) {
		ubidi_close(p_shaped->bidi_iter[i]);
	}
	p_shaped->bidi_iter.clear();

	if (p_text) {
		if (p_shaped->script_iter != nullptr) {
			memdelete(p_shaped->script_iter);
			p_shaped->script_iter = nullptr;
		}
		p_shaped->break_ops_valid = false;
		p_shaped->js_ops_valid = false;
	}
}

void TextServerAdvanced::full_copy(ShapedTextDataAdvanced *p_shaped) {
	ShapedTextDataAdvanced *parent = shaped_owner.get_or_null(p_shaped->parent);

	for (const KeyValue<Variant, ShapedTextDataAdvanced::EmbeddedObject> &E : parent->objects) {
		if (E.value.pos >= p_shaped->start && E.value.pos < p_shaped->end) {
			p_shaped->objects[E.key] = E.value;
		}
	}

	for (int i = 0; i < parent->spans.size(); i++) {
		ShapedTextDataAdvanced::Span span = parent->spans[i];
		if (span.start >= p_shaped->end || span.end <= p_shaped->start) {
			continue;
		}
		span.start = MAX(p_shaped->start, span.start);
		span.end = MIN(p_shaped->end, span.end);
		p_shaped->spans.push_back(span);
	}

	p_shaped->parent = RID();
}

RID TextServerAdvanced::create_shaped_text(TextServer::Direction p_direction, TextServer::Orientation p_orientation) {
	_THREAD_SAFE_METHOD_
	ShapedTextDataAdvanced *sd = memnew(ShapedTextDataAdvanced);
	sd->hb_buffer = hb_buffer_create();
	sd->direction = p_direction;
	sd->orientation = p_orientation;
	return shaped_owner.make_rid(sd);
}

void TextServerAdvanced::shaped_text_clear(const RID &p_shaped) {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND(!sd);

	MutexLock lock(sd->mutex);
	sd->parent = RID();
	sd->start = 0;
	sd->end = 0;
	sd->text = String();
	sd->spans.clear();
	sd->objects.clear();
	sd->bidi_override.clear();
	invalidate(sd, true);
}

void TextServerAdvanced::shaped_text_set_direction(const RID &p_shaped, TextServer::Direction p_direction) {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND(!sd);

	MutexLock lock(sd->mutex);
	if (sd->direction != p_direction) {
		if (sd->parent != RID()) {
			full_copy(sd);
		}
		sd->direction = p_direction;
		invalidate(sd, false);
	}
}

TextServer::Direction TextServerAdvanced::shaped_text_get_direction(const RID &p_shaped) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, TextServer::DIRECTION_LTR);

	MutexLock lock(sd->mutex);
	return sd->direction;
}

TextServer::Direction TextServerAdvanced::shaped_text_get_inferred_direction(const RID &p_shaped) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, TextServer::DIRECTION_LTR);

	MutexLock lock(sd->mutex);
	return sd->para_direction;
}

void TextServerAdvanced::shaped_text_set_custom_punctuation(const RID &p_shaped, const String &p_punct) {
	_THREAD_SAFE_METHOD_
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND(!sd);

	if (sd->custom_punct != p_punct) {
		if (sd->parent != RID()) {
			full_copy(sd);
		}
		sd->custom_punct = p_punct;
		invalidate(sd, false);
	}
}

String TextServerAdvanced::shaped_text_get_custom_punctuation(const RID &p_shaped) const {
	_THREAD_SAFE_METHOD_
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, String());
	return sd->custom_punct;
}

void TextServerAdvanced::shaped_text_set_bidi_override(const RID &p_shaped, const Array &p_override) {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND(!sd);

	MutexLock lock(sd->mutex);
	if (sd->parent != RID()) {
		full_copy(sd);
	}
	sd->bidi_override.clear();
	for (int i = 0; i < p_override.size(); i++) {
		sd->bidi_override.push_back(p_override[i]);
	}
	invalidate(sd, false);
}

void TextServerAdvanced::shaped_text_set_orientation(const RID &p_shaped, TextServer::Orientation p_orientation) {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND(!sd);

	MutexLock lock(sd->mutex);
	if (sd->orientation != p_orientation) {
		if (sd->parent != RID()) {
			full_copy(sd);
		}
		sd->orientation = p_orientation;
		invalidate(sd, false);
	}
}

void TextServerAdvanced::shaped_text_set_preserve_invalid(const RID &p_shaped, bool p_enabled) {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND(!sd);

	MutexLock lock(sd->mutex);
	ERR_FAIL_COND(sd->parent != RID());
	if (sd->preserve_invalid != p_enabled) {
		sd->preserve_invalid = p_enabled;
		invalidate(sd, false);
	}
}

bool TextServerAdvanced::shaped_text_get_preserve_invalid(const RID &p_shaped) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, false);

	MutexLock lock(sd->mutex);
	return sd->preserve_invalid;
}

void TextServerAdvanced::shaped_text_set_preserve_control(const RID &p_shaped, bool p_enabled) {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND(!sd);

	MutexLock lock(sd->mutex);
	if (sd->preserve_control != p_enabled) {
		if (sd->parent != RID()) {
			full_copy(sd);
		}
		sd->preserve_control = p_enabled;
		invalidate(sd, false);
	}
}

bool TextServerAdvanced::shaped_text_get_preserve_control(const RID &p_shaped) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, false);

	MutexLock lock(sd->mutex);
	return sd->preserve_control;
}

TextServer::Orientation TextServerAdvanced::shaped_text_get_orientation(const RID &p_shaped) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, TextServer::ORIENTATION_HORIZONTAL);

	MutexLock lock(sd->mutex);
	return sd->orientation;
}

int64_t TextServerAdvanced::shaped_get_span_count(const RID &p_shaped) const {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, 0);
	return sd->spans.size();
}

Variant TextServerAdvanced::shaped_get_span_meta(const RID &p_shaped, int64_t p_index) const {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, Variant());
	ERR_FAIL_INDEX_V(p_index, sd->spans.size(), Variant());
	return sd->spans[p_index].meta;
}

void TextServerAdvanced::shaped_set_span_update_font(const RID &p_shaped, int64_t p_index, const Array &p_fonts, int64_t p_size, const Dictionary &p_opentype_features) {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND(!sd);
	ERR_FAIL_INDEX(p_index, sd->spans.size());

	ShapedTextDataAdvanced::Span &span = sd->spans.ptrw()[p_index];
	bool changed = (span.font_size != p_size) || (span.features != p_opentype_features) || (p_fonts.size() != span.fonts.size());
	if (!changed) {
		for (int i = 0; i < p_fonts.size(); i++) {
			changed = changed || (span.fonts[i] != p_fonts[i]);
		}
	}
	if (changed) {
		span.fonts = p_fonts;
		span.font_size = p_size;
		span.features = p_opentype_features;

		invalidate(sd, false);
	}
}

bool TextServerAdvanced::shaped_text_add_string(const RID &p_shaped, const String &p_text, const Array &p_fonts, int64_t p_size, const Dictionary &p_opentype_features, const String &p_language, const Variant &p_meta) {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, false);
	ERR_FAIL_COND_V(p_size <= 0, false);

	MutexLock lock(sd->mutex);
	for (int i = 0; i < p_fonts.size(); i++) {
		ERR_FAIL_COND_V(!font_owner.get_or_null(p_fonts[i]), false);
	}

	if (p_text.is_empty()) {
		return true;
	}

	if (sd->parent != RID()) {
		full_copy(sd);
	}

	ShapedTextDataAdvanced::Span span;
	span.start = sd->text.length();
	span.end = span.start + p_text.length();
	span.fonts = p_fonts; // Do not pre-sort, spans will be divided to subruns later.
	span.font_size = p_size;
	span.language = p_language;
	span.features = p_opentype_features;
	span.meta = p_meta;

	sd->spans.push_back(span);
	sd->text = sd->text + p_text;
	sd->end += p_text.length();
	invalidate(sd, true);

	return true;
}

bool TextServerAdvanced::shaped_text_add_object(const RID &p_shaped, const Variant &p_key, const Size2 &p_size, InlineAlignment p_inline_align, int64_t p_length) {
	_THREAD_SAFE_METHOD_
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, false);
	ERR_FAIL_COND_V(p_key == Variant(), false);
	ERR_FAIL_COND_V(sd->objects.has(p_key), false);

	if (sd->parent != RID()) {
		full_copy(sd);
	}

	ShapedTextDataAdvanced::Span span;
	span.start = sd->start + sd->text.length();
	span.end = span.start + p_length;
	span.embedded_key = p_key;

	ShapedTextDataAdvanced::EmbeddedObject obj;
	obj.inline_align = p_inline_align;
	obj.rect.size = p_size;
	obj.pos = span.start;

	sd->spans.push_back(span);
	sd->text = sd->text + String::chr(0xfffc).repeat(p_length);
	sd->end += p_length;
	sd->objects[p_key] = obj;
	invalidate(sd, true);

	return true;
}

bool TextServerAdvanced::shaped_text_resize_object(const RID &p_shaped, const Variant &p_key, const Size2 &p_size, InlineAlignment p_inline_align) {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, false);

	MutexLock lock(sd->mutex);
	ERR_FAIL_COND_V(!sd->objects.has(p_key), false);
	sd->objects[p_key].rect.size = p_size;
	sd->objects[p_key].inline_align = p_inline_align;
	if (sd->valid) {
		// Recalc string metrics.
		sd->ascent = 0;
		sd->descent = 0;
		sd->width = 0;
		sd->upos = 0;
		sd->uthk = 0;
		int sd_size = sd->glyphs.size();

		for (int i = 0; i < sd_size; i++) {
			Glyph gl = sd->glyphs[i];
			Variant key;
			if (gl.count == 1) {
				for (const KeyValue<Variant, ShapedTextDataAdvanced::EmbeddedObject> &E : sd->objects) {
					if (E.value.pos == gl.start) {
						key = E.key;
						break;
					}
				}
			}
			if (key != Variant()) {
				if (sd->orientation == ORIENTATION_HORIZONTAL) {
					sd->objects[key].rect.position.x = sd->width;
					sd->width += sd->objects[key].rect.size.x;
					sd->glyphs.write[i].advance = sd->objects[key].rect.size.x;
				} else {
					sd->objects[key].rect.position.y = sd->width;
					sd->width += sd->objects[key].rect.size.y;
					sd->glyphs.write[i].advance = sd->objects[key].rect.size.y;
				}
			} else {
				if (gl.font_rid.is_valid()) {
					if (sd->orientation == ORIENTATION_HORIZONTAL) {
						sd->ascent = MAX(sd->ascent, MAX(font_get_ascent(gl.font_rid, gl.font_size), -gl.y_off));
						sd->descent = MAX(sd->descent, MAX(font_get_descent(gl.font_rid, gl.font_size), gl.y_off));
					} else {
						sd->ascent = MAX(sd->ascent, Math::round(font_get_glyph_advance(gl.font_rid, gl.font_size, gl.index).x * 0.5));
						sd->descent = MAX(sd->descent, Math::round(font_get_glyph_advance(gl.font_rid, gl.font_size, gl.index).x * 0.5));
					}
					sd->upos = MAX(sd->upos, font_get_underline_position(gl.font_rid, gl.font_size));
					sd->uthk = MAX(sd->uthk, font_get_underline_thickness(gl.font_rid, gl.font_size));
				} else if (sd->preserve_invalid || (sd->preserve_control && is_control(gl.index))) {
					// Glyph not found, replace with hex code box.
					if (sd->orientation == ORIENTATION_HORIZONTAL) {
						sd->ascent = MAX(sd->ascent, get_hex_code_box_size(gl.font_size, gl.index).y);
					} else {
						sd->ascent = MAX(sd->ascent, Math::round(get_hex_code_box_size(gl.font_size, gl.index).x * 0.5));
						sd->descent = MAX(sd->descent, Math::round(get_hex_code_box_size(gl.font_size, gl.index).x * 0.5));
					}
				}
				sd->width += gl.advance * gl.repeat;
			}
		}
		_realign(sd);
	}
	return true;
}

void TextServerAdvanced::_realign(ShapedTextDataAdvanced *p_sd) const {
	// Align embedded objects to baseline.
	double full_ascent = p_sd->ascent;
	double full_descent = p_sd->descent;
	for (KeyValue<Variant, ShapedTextDataAdvanced::EmbeddedObject> &E : p_sd->objects) {
		if ((E.value.pos >= p_sd->start) && (E.value.pos < p_sd->end)) {
			if (p_sd->orientation == ORIENTATION_HORIZONTAL) {
				switch (E.value.inline_align & INLINE_ALIGNMENT_TEXT_MASK) {
					case INLINE_ALIGNMENT_TO_TOP: {
						E.value.rect.position.y = -p_sd->ascent;
					} break;
					case INLINE_ALIGNMENT_TO_CENTER: {
						E.value.rect.position.y = (-p_sd->ascent + p_sd->descent) / 2;
					} break;
					case INLINE_ALIGNMENT_TO_BASELINE: {
						E.value.rect.position.y = 0;
					} break;
					case INLINE_ALIGNMENT_TO_BOTTOM: {
						E.value.rect.position.y = p_sd->descent;
					} break;
				}
				switch (E.value.inline_align & INLINE_ALIGNMENT_IMAGE_MASK) {
					case INLINE_ALIGNMENT_BOTTOM_TO: {
						E.value.rect.position.y -= E.value.rect.size.y;
					} break;
					case INLINE_ALIGNMENT_CENTER_TO: {
						E.value.rect.position.y -= E.value.rect.size.y / 2;
					} break;
					case INLINE_ALIGNMENT_TOP_TO: {
						// NOP
					} break;
				}
				full_ascent = MAX(full_ascent, -E.value.rect.position.y);
				full_descent = MAX(full_descent, E.value.rect.position.y + E.value.rect.size.y);
			} else {
				switch (E.value.inline_align & INLINE_ALIGNMENT_TEXT_MASK) {
					case INLINE_ALIGNMENT_TO_TOP: {
						E.value.rect.position.x = -p_sd->ascent;
					} break;
					case INLINE_ALIGNMENT_TO_CENTER: {
						E.value.rect.position.x = (-p_sd->ascent + p_sd->descent) / 2;
					} break;
					case INLINE_ALIGNMENT_TO_BASELINE: {
						E.value.rect.position.x = 0;
					} break;
					case INLINE_ALIGNMENT_TO_BOTTOM: {
						E.value.rect.position.x = p_sd->descent;
					} break;
				}
				switch (E.value.inline_align & INLINE_ALIGNMENT_IMAGE_MASK) {
					case INLINE_ALIGNMENT_BOTTOM_TO: {
						E.value.rect.position.x -= E.value.rect.size.x;
					} break;
					case INLINE_ALIGNMENT_CENTER_TO: {
						E.value.rect.position.x -= E.value.rect.size.x / 2;
					} break;
					case INLINE_ALIGNMENT_TOP_TO: {
						// NOP
					} break;
				}
				full_ascent = MAX(full_ascent, -E.value.rect.position.x);
				full_descent = MAX(full_descent, E.value.rect.position.x + E.value.rect.size.x);
			}
		}
	}
	p_sd->ascent = full_ascent;
	p_sd->descent = full_descent;
}

RID TextServerAdvanced::shaped_text_substr(const RID &p_shaped, int64_t p_start, int64_t p_length) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, RID());

	MutexLock lock(sd->mutex);
	if (sd->parent != RID()) {
		return shaped_text_substr(sd->parent, p_start, p_length);
	}
	if (!sd->valid) {
		const_cast<TextServerAdvanced *>(this)->shaped_text_shape(p_shaped);
	}
	ERR_FAIL_COND_V(p_start < 0 || p_length < 0, RID());
	ERR_FAIL_COND_V(sd->start > p_start || sd->end < p_start, RID());
	ERR_FAIL_COND_V(sd->end < p_start + p_length, RID());

	ShapedTextDataAdvanced *new_sd = memnew(ShapedTextDataAdvanced);
	new_sd->parent = p_shaped;
	new_sd->start = p_start;
	new_sd->end = p_start + p_length;
	new_sd->orientation = sd->orientation;
	new_sd->direction = sd->direction;
	new_sd->custom_punct = sd->custom_punct;
	new_sd->para_direction = sd->para_direction;

	if (!_shape_substr(new_sd, sd, p_start, p_length)) {
		memdelete(new_sd);
		return RID();
	}
	return shaped_owner.make_rid(new_sd);
}

bool TextServerAdvanced::_shape_substr(ShapedTextDataAdvanced *p_new_sd, const ShapedTextDataAdvanced *p_sd, int64_t p_start, int64_t p_length) const {
	if (p_new_sd->valid) {
		return true;
	}

	p_new_sd->hb_buffer = hb_buffer_create();

	p_new_sd->line_breaks_valid = p_sd->line_breaks_valid;
	p_new_sd->justification_ops_valid = p_sd->justification_ops_valid;
	p_new_sd->sort_valid = false;
	p_new_sd->upos = p_sd->upos;
	p_new_sd->uthk = p_sd->uthk;

	if (p_length > 0) {
		p_new_sd->text = p_sd->text.substr(p_start - p_sd->start, p_length);
		p_new_sd->utf16 = p_new_sd->text.utf16();
		p_new_sd->script_iter = memnew(ScriptIterator(p_new_sd->text, 0, p_new_sd->text.length()));

		int sd_size = p_sd->glyphs.size();
		const Glyph *sd_glyphs = p_sd->glyphs.ptr();
		for (int ov = 0; ov < p_sd->bidi_override.size(); ov++) {
			UErrorCode err = U_ZERO_ERROR;

			if (p_sd->bidi_override[ov].x >= p_start + p_length || p_sd->bidi_override[ov].y <= p_start) {
				continue;
			}
			int start = _convert_pos_inv(p_sd, MAX(0, p_start - p_sd->bidi_override[ov].x));
			int end = _convert_pos_inv(p_sd, MIN(p_start + p_length, p_sd->bidi_override[ov].y) - p_sd->bidi_override[ov].x);

			ERR_FAIL_COND_V_MSG((start < 0 || end - start > p_new_sd->utf16.length()), false, "Invalid BiDi override range.");

			// Create temporary line bidi & shape.
			UBiDi *bidi_iter = ubidi_openSized(end - start, 0, &err);
			ERR_FAIL_COND_V_MSG(U_FAILURE(err), false, u_errorName(err));
			ubidi_setLine(p_sd->bidi_iter[ov], start, end, bidi_iter, &err);
			if (U_FAILURE(err)) {
				ubidi_close(bidi_iter);
				ERR_FAIL_V_MSG(false, u_errorName(err));
			}
			p_new_sd->bidi_iter.push_back(bidi_iter);

			err = U_ZERO_ERROR;
			int bidi_run_count = ubidi_countRuns(bidi_iter, &err);
			ERR_FAIL_COND_V_MSG(U_FAILURE(err), false, u_errorName(err));
			for (int i = 0; i < bidi_run_count; i++) {
				int32_t _bidi_run_start = 0;
				int32_t _bidi_run_length = 0;
				ubidi_getVisualRun(bidi_iter, i, &_bidi_run_start, &_bidi_run_length);

				int32_t bidi_run_start = _convert_pos(p_sd, p_sd->bidi_override[ov].x + start + _bidi_run_start);
				int32_t bidi_run_end = _convert_pos(p_sd, p_sd->bidi_override[ov].x + start + _bidi_run_start + _bidi_run_length);

				for (int j = 0; j < sd_size; j++) {
					if ((sd_glyphs[j].start >= bidi_run_start) && (sd_glyphs[j].end <= bidi_run_end)) {
						// Copy glyphs.
						Glyph gl = sd_glyphs[j];
						Variant key;
						bool find_embedded = false;
						if (gl.count == 1) {
							for (const KeyValue<Variant, ShapedTextDataAdvanced::EmbeddedObject> &E : p_sd->objects) {
								if (E.value.pos == gl.start) {
									find_embedded = true;
									key = E.key;
									p_new_sd->objects[key] = E.value;
									break;
								}
							}
						}
						if (find_embedded) {
							if (p_new_sd->orientation == ORIENTATION_HORIZONTAL) {
								p_new_sd->objects[key].rect.position.x = p_new_sd->width;
								p_new_sd->width += p_new_sd->objects[key].rect.size.x;
							} else {
								p_new_sd->objects[key].rect.position.y = p_new_sd->width;
								p_new_sd->width += p_new_sd->objects[key].rect.size.y;
							}
						} else {
							if (gl.font_rid.is_valid()) {
								if (p_new_sd->orientation == ORIENTATION_HORIZONTAL) {
									p_new_sd->ascent = MAX(p_new_sd->ascent, MAX(font_get_ascent(gl.font_rid, gl.font_size), -gl.y_off));
									p_new_sd->descent = MAX(p_new_sd->descent, MAX(font_get_descent(gl.font_rid, gl.font_size), gl.y_off));
								} else {
									p_new_sd->ascent = MAX(p_new_sd->ascent, Math::round(font_get_glyph_advance(gl.font_rid, gl.font_size, gl.index).x * 0.5));
									p_new_sd->descent = MAX(p_new_sd->descent, Math::round(font_get_glyph_advance(gl.font_rid, gl.font_size, gl.index).x * 0.5));
								}
							} else if (p_new_sd->preserve_invalid || (p_new_sd->preserve_control && is_control(gl.index))) {
								// Glyph not found, replace with hex code box.
								if (p_new_sd->orientation == ORIENTATION_HORIZONTAL) {
									p_new_sd->ascent = MAX(p_new_sd->ascent, get_hex_code_box_size(gl.font_size, gl.index).y);
								} else {
									p_new_sd->ascent = MAX(p_new_sd->ascent, Math::round(get_hex_code_box_size(gl.font_size, gl.index).x * 0.5));
									p_new_sd->descent = MAX(p_new_sd->descent, Math::round(get_hex_code_box_size(gl.font_size, gl.index).x * 0.5));
								}
							}
							p_new_sd->width += gl.advance * gl.repeat;
						}
						p_new_sd->glyphs.push_back(gl);
					}
				}
			}
		}

		_realign(p_new_sd);
	}
	p_new_sd->valid = true;

	return true;
}

RID TextServerAdvanced::shaped_text_get_parent(const RID &p_shaped) const {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, RID());

	MutexLock lock(sd->mutex);
	return sd->parent;
}

double TextServerAdvanced::shaped_text_fit_to_width(const RID &p_shaped, double p_width, int64_t /*JustificationFlag*/ p_jst_flags) {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, 0.0);

	MutexLock lock(sd->mutex);
	if (!sd->valid) {
		const_cast<TextServerAdvanced *>(this)->shaped_text_shape(p_shaped);
	}
	if (!sd->justification_ops_valid) {
		const_cast<TextServerAdvanced *>(this)->shaped_text_update_justification_ops(p_shaped);
	}

	sd->fit_width_minimum_reached = false;
	int start_pos = 0;
	int end_pos = sd->glyphs.size() - 1;

	if ((p_jst_flags & JUSTIFICATION_AFTER_LAST_TAB) == JUSTIFICATION_AFTER_LAST_TAB) {
		int start, end, delta;
		if (sd->para_direction == DIRECTION_LTR) {
			start = sd->glyphs.size() - 1;
			end = -1;
			delta = -1;
		} else {
			start = 0;
			end = sd->glyphs.size();
			delta = +1;
		}

		for (int i = start; i != end; i += delta) {
			if ((sd->glyphs[i].flags & GRAPHEME_IS_TAB) == GRAPHEME_IS_TAB) {
				if (sd->para_direction == DIRECTION_LTR) {
					start_pos = i;
					break;
				} else {
					end_pos = i;
					break;
				}
			}
		}
	}

	double justification_width;
	if ((p_jst_flags & JUSTIFICATION_CONSTRAIN_ELLIPSIS) == JUSTIFICATION_CONSTRAIN_ELLIPSIS) {
		if (sd->overrun_trim_data.trim_pos >= 0) {
			if (sd->para_direction == DIRECTION_RTL) {
				start_pos = sd->overrun_trim_data.trim_pos;
			} else {
				end_pos = sd->overrun_trim_data.trim_pos;
			}
			justification_width = sd->width_trimmed;
		} else {
			return Math::ceil(sd->width);
		}
	} else {
		justification_width = sd->width;
	}

	if ((p_jst_flags & JUSTIFICATION_TRIM_EDGE_SPACES) == JUSTIFICATION_TRIM_EDGE_SPACES) {
		// Trim spaces.
		while ((start_pos < end_pos) && ((sd->glyphs[start_pos].flags & GRAPHEME_IS_SPACE) == GRAPHEME_IS_SPACE || (sd->glyphs[start_pos].flags & GRAPHEME_IS_BREAK_HARD) == GRAPHEME_IS_BREAK_HARD || (sd->glyphs[start_pos].flags & GRAPHEME_IS_BREAK_SOFT) == GRAPHEME_IS_BREAK_SOFT)) {
			justification_width -= sd->glyphs[start_pos].advance * sd->glyphs[start_pos].repeat;
			sd->glyphs.write[start_pos].advance = 0;
			start_pos += sd->glyphs[start_pos].count;
		}
		while ((start_pos < end_pos) && ((sd->glyphs[end_pos].flags & GRAPHEME_IS_SPACE) == GRAPHEME_IS_SPACE || (sd->glyphs[end_pos].flags & GRAPHEME_IS_BREAK_HARD) == GRAPHEME_IS_BREAK_HARD || (sd->glyphs[end_pos].flags & GRAPHEME_IS_BREAK_SOFT) == GRAPHEME_IS_BREAK_SOFT)) {
			justification_width -= sd->glyphs[end_pos].advance * sd->glyphs[end_pos].repeat;
			sd->glyphs.write[end_pos].advance = 0;
			end_pos -= sd->glyphs[end_pos].count;
		}
	} else {
		// Skip breaks, but do not reset size.
		while ((start_pos < end_pos) && ((sd->glyphs[start_pos].flags & GRAPHEME_IS_BREAK_HARD) == GRAPHEME_IS_BREAK_HARD || (sd->glyphs[start_pos].flags & GRAPHEME_IS_BREAK_SOFT) == GRAPHEME_IS_BREAK_SOFT)) {
			start_pos += sd->glyphs[start_pos].count;
		}
		while ((start_pos < end_pos) && ((sd->glyphs[end_pos].flags & GRAPHEME_IS_BREAK_HARD) == GRAPHEME_IS_BREAK_HARD || (sd->glyphs[end_pos].flags & GRAPHEME_IS_BREAK_SOFT) == GRAPHEME_IS_BREAK_SOFT)) {
			end_pos -= sd->glyphs[end_pos].count;
		}
	}

	int space_count = 0;
	int elongation_count = 0;
	for (int i = start_pos; i <= end_pos; i++) {
		const Glyph &gl = sd->glyphs[i];
		if (gl.count > 0) {
			if ((gl.flags & GRAPHEME_IS_ELONGATION) == GRAPHEME_IS_ELONGATION) {
				if ((i > 0) && ((sd->glyphs[i - 1].flags & GRAPHEME_IS_ELONGATION) != GRAPHEME_IS_ELONGATION)) {
					// Expand once per elongation sequence.
					elongation_count++;
				}
			}
			if ((gl.flags & GRAPHEME_IS_SPACE) == GRAPHEME_IS_SPACE) {
				space_count++;
			}
		}
	}

	if ((elongation_count > 0) && ((p_jst_flags & JUSTIFICATION_KASHIDA) == JUSTIFICATION_KASHIDA)) {
		double delta_width_per_kashida = (p_width - justification_width) / elongation_count;
		for (int i = start_pos; i <= end_pos; i++) {
			Glyph &gl = sd->glyphs.write[i];
			if (gl.count > 0) {
				if (((gl.flags & GRAPHEME_IS_ELONGATION) == GRAPHEME_IS_ELONGATION) && (gl.advance > 0)) {
					if ((i > 0) && ((sd->glyphs[i - 1].flags & GRAPHEME_IS_ELONGATION) != GRAPHEME_IS_ELONGATION)) {
						// Expand once per elongation sequence.
						int count = delta_width_per_kashida / gl.advance;
						int prev_count = gl.repeat;
						if ((gl.flags & GRAPHEME_IS_VIRTUAL) == GRAPHEME_IS_VIRTUAL) {
							gl.repeat = MAX(count, 0);
						} else {
							gl.repeat = MAX(count + 1, 1);
						}
						justification_width += (gl.repeat - prev_count) * gl.advance;
					}
				}
			}
		}
	}
	double adv_remain = 0;
	if ((space_count > 0) && ((p_jst_flags & JUSTIFICATION_WORD_BOUND) == JUSTIFICATION_WORD_BOUND)) {
		double delta_width_per_space = (p_width - justification_width) / space_count;
		for (int i = start_pos; i <= end_pos; i++) {
			Glyph &gl = sd->glyphs.write[i];
			if (gl.count > 0) {
				if ((gl.flags & GRAPHEME_IS_SPACE) == GRAPHEME_IS_SPACE) {
					double old_adv = gl.advance;
					double new_advance;
					if ((gl.flags & GRAPHEME_IS_VIRTUAL) == GRAPHEME_IS_VIRTUAL) {
						new_advance = MAX(gl.advance + delta_width_per_space, 0.0);
					} else {
						new_advance = MAX(gl.advance + delta_width_per_space, 0.1 * gl.font_size);
					}
					gl.advance = new_advance;
					adv_remain += (new_advance - gl.advance);
					if (adv_remain >= 1.0) {
						gl.advance++;
						adv_remain -= 1.0;
					} else if (adv_remain <= -1.0) {
						gl.advance = MAX(gl.advance - 1, 0);
						adv_remain -= 1.0;
					}
					justification_width += (gl.advance - old_adv);
				}
			}
		}
	}

	if (Math::floor(p_width) < Math::floor(justification_width)) {
		sd->fit_width_minimum_reached = true;
	}

	if ((p_jst_flags & JUSTIFICATION_CONSTRAIN_ELLIPSIS) != JUSTIFICATION_CONSTRAIN_ELLIPSIS) {
		sd->width = justification_width;
	}

	return Math::ceil(justification_width);
}

double TextServerAdvanced::shaped_text_tab_align(const RID &p_shaped, const PackedFloat32Array &p_tab_stops) {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, 0.0);

	MutexLock lock(sd->mutex);
	if (!sd->valid) {
		const_cast<TextServerAdvanced *>(this)->shaped_text_shape(p_shaped);
	}
	if (!sd->line_breaks_valid) {
		const_cast<TextServerAdvanced *>(this)->shaped_text_update_breaks(p_shaped);
	}

	for (int i = 0; i < p_tab_stops.size(); i++) {
		if (p_tab_stops[i] <= 0) {
			return 0.0;
		}
	}

	int tab_index = 0;
	double off = 0.0;

	int start, end, delta;
	if (sd->para_direction == DIRECTION_LTR) {
		start = 0;
		end = sd->glyphs.size();
		delta = +1;
	} else {
		start = sd->glyphs.size() - 1;
		end = -1;
		delta = -1;
	}

	Glyph *gl = sd->glyphs.ptrw();

	for (int i = start; i != end; i += delta) {
		if ((gl[i].flags & GRAPHEME_IS_TAB) == GRAPHEME_IS_TAB) {
			double tab_off = 0.0;
			while (tab_off <= off) {
				tab_off += p_tab_stops[tab_index];
				tab_index++;
				if (tab_index >= p_tab_stops.size()) {
					tab_index = 0;
				}
			}
			double old_adv = gl[i].advance;
			gl[i].advance = tab_off - off;
			sd->width += gl[i].advance - old_adv;
			off = 0;
			continue;
		}
		off += gl[i].advance * gl[i].repeat;
	}

	return 0.0;
}

void TextServerAdvanced::shaped_text_overrun_trim_to_width(const RID &p_shaped_line, double p_width, int64_t p_trim_flags) {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped_line);
	ERR_FAIL_COND_MSG(!sd, "ShapedTextDataAdvanced invalid.");

	MutexLock lock(sd->mutex);
	if (!sd->valid) {
		shaped_text_shape(p_shaped_line);
	}

	sd->text_trimmed = false;
	sd->overrun_trim_data.ellipsis_glyph_buf.clear();

	bool add_ellipsis = (p_trim_flags & OVERRUN_ADD_ELLIPSIS) == OVERRUN_ADD_ELLIPSIS;
	bool cut_per_word = (p_trim_flags & OVERRUN_TRIM_WORD_ONLY) == OVERRUN_TRIM_WORD_ONLY;
	bool enforce_ellipsis = (p_trim_flags & OVERRUN_ENFORCE_ELLIPSIS) == OVERRUN_ENFORCE_ELLIPSIS;
	bool justification_aware = (p_trim_flags & OVERRUN_JUSTIFICATION_AWARE) == OVERRUN_JUSTIFICATION_AWARE;

	Glyph *sd_glyphs = sd->glyphs.ptrw();

	if ((p_trim_flags & OVERRUN_TRIM) == OVERRUN_NO_TRIMMING || sd_glyphs == nullptr || p_width <= 0 || !(sd->width > p_width || enforce_ellipsis)) {
		sd->overrun_trim_data.trim_pos = -1;
		sd->overrun_trim_data.ellipsis_pos = -1;
		return;
	}

	if (justification_aware && !sd->fit_width_minimum_reached) {
		return;
	}

	Vector<ShapedTextDataAdvanced::Span> &spans = sd->spans;
	if (sd->parent != RID()) {
		ShapedTextDataAdvanced *parent_sd = shaped_owner.get_or_null(sd->parent);
		ERR_FAIL_COND(!parent_sd->valid);
		spans = parent_sd->spans;
	}

	if (spans.size() == 0) {
		return;
	}

	int sd_size = sd->glyphs.size();
	int last_gl_font_size = sd_glyphs[sd_size - 1].font_size;

	// Find usable fonts, if fonts from the last glyph do not have required chars.
	RID dot_gl_font_rid = sd_glyphs[sd_size - 1].font_rid;
	if (!font_has_char(dot_gl_font_rid, '.')) {
		const Array &fonts = spans[spans.size() - 1].fonts;
		for (int i = 0; i < fonts.size(); i++) {
			if (font_has_char(fonts[i], '.')) {
				dot_gl_font_rid = fonts[i];
				break;
			}
		}
	}
	RID whitespace_gl_font_rid = sd_glyphs[sd_size - 1].font_rid;
	if (!font_has_char(whitespace_gl_font_rid, '.')) {
		const Array &fonts = spans[spans.size() - 1].fonts;
		for (int i = 0; i < fonts.size(); i++) {
			if (font_has_char(fonts[i], ' ')) {
				whitespace_gl_font_rid = fonts[i];
				break;
			}
		}
	}

	int32_t dot_gl_idx = dot_gl_font_rid.is_valid() ? font_get_glyph_index(dot_gl_font_rid, last_gl_font_size, '.') : -10;
	Vector2 dot_adv = dot_gl_font_rid.is_valid() ? font_get_glyph_advance(dot_gl_font_rid, last_gl_font_size, dot_gl_idx) : Vector2();
	int32_t whitespace_gl_idx = whitespace_gl_font_rid.is_valid() ? font_get_glyph_index(whitespace_gl_font_rid, last_gl_font_size, ' ') : -10;
	Vector2 whitespace_adv = whitespace_gl_font_rid.is_valid() ? font_get_glyph_advance(whitespace_gl_font_rid, last_gl_font_size, whitespace_gl_idx) : Vector2();

	int ellipsis_width = 0;
	if (add_ellipsis && whitespace_gl_font_rid.is_valid()) {
		ellipsis_width = 3 * dot_adv.x + font_get_spacing(whitespace_gl_font_rid, last_gl_font_size, SPACING_GLYPH) + (cut_per_word ? whitespace_adv.x : 0);
	}

	int ell_min_characters = 6;
	double width = sd->width;

	bool is_rtl = sd->para_direction == DIRECTION_RTL;

	int trim_pos = (is_rtl) ? sd_size : 0;
	int ellipsis_pos = (enforce_ellipsis) ? 0 : -1;

	int last_valid_cut = 0;
	bool found = false;

	int glyphs_from = (is_rtl) ? 0 : sd_size - 1;
	int glyphs_to = (is_rtl) ? sd_size - 1 : -1;
	int glyphs_delta = (is_rtl) ? +1 : -1;

	for (int i = glyphs_from; i != glyphs_to; i += glyphs_delta) {
		if (!is_rtl) {
			width -= sd_glyphs[i].advance * sd_glyphs[i].repeat;
		}
		if (sd_glyphs[i].count > 0) {
			bool above_min_char_threshold = ((is_rtl) ? sd_size - 1 - i : i) >= ell_min_characters;

			if (width + (((above_min_char_threshold && add_ellipsis) || enforce_ellipsis) ? ellipsis_width : 0) <= p_width) {
				if (cut_per_word && above_min_char_threshold) {
					if ((sd_glyphs[i].flags & GRAPHEME_IS_BREAK_SOFT) == GRAPHEME_IS_BREAK_SOFT) {
						last_valid_cut = i;
						found = true;
					}
				} else {
					last_valid_cut = i;
					found = true;
				}
				if (found) {
					trim_pos = last_valid_cut;

					if (add_ellipsis && (above_min_char_threshold || enforce_ellipsis) && width - ellipsis_width <= p_width) {
						ellipsis_pos = trim_pos;
					}
					break;
				}
			}
		}
		if (is_rtl) {
			width -= sd_glyphs[i].advance * sd_glyphs[i].repeat;
		}
	}

	sd->overrun_trim_data.trim_pos = trim_pos;
	sd->overrun_trim_data.ellipsis_pos = ellipsis_pos;
	if (trim_pos == 0 && enforce_ellipsis && add_ellipsis) {
		sd->overrun_trim_data.ellipsis_pos = 0;
	}

	if ((trim_pos >= 0 && sd->width > p_width) || enforce_ellipsis) {
		if (add_ellipsis && (ellipsis_pos > 0 || enforce_ellipsis)) {
			// Insert an additional space when cutting word bound for aesthetics.
			if (cut_per_word && (ellipsis_pos > 0)) {
				Glyph gl;
				gl.count = 1;
				gl.advance = whitespace_adv.x;
				gl.index = whitespace_gl_idx;
				gl.font_rid = whitespace_gl_font_rid;
				gl.font_size = last_gl_font_size;
				gl.flags = GRAPHEME_IS_SPACE | GRAPHEME_IS_BREAK_SOFT | GRAPHEME_IS_VIRTUAL | (is_rtl ? GRAPHEME_IS_RTL : 0);

				sd->overrun_trim_data.ellipsis_glyph_buf.append(gl);
			}
			// Add ellipsis dots.
			if (dot_gl_idx != 0) {
				Glyph gl;
				gl.count = 1;
				gl.repeat = 3;
				gl.advance = dot_adv.x;
				gl.index = dot_gl_idx;
				gl.font_rid = dot_gl_font_rid;
				gl.font_size = last_gl_font_size;
				gl.flags = GRAPHEME_IS_PUNCTUATION | GRAPHEME_IS_VIRTUAL | (is_rtl ? GRAPHEME_IS_RTL : 0);

				sd->overrun_trim_data.ellipsis_glyph_buf.append(gl);
			}
		}

		sd->text_trimmed = true;
		sd->width_trimmed = width + ((ellipsis_pos != -1) ? ellipsis_width : 0);
	}
}

int64_t TextServerAdvanced::shaped_text_get_trim_pos(const RID &p_shaped) const {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V_MSG(!sd, -1, "ShapedTextDataAdvanced invalid.");

	MutexLock lock(sd->mutex);
	return sd->overrun_trim_data.trim_pos;
}

int64_t TextServerAdvanced::shaped_text_get_ellipsis_pos(const RID &p_shaped) const {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V_MSG(!sd, -1, "ShapedTextDataAdvanced invalid.");

	MutexLock lock(sd->mutex);
	return sd->overrun_trim_data.ellipsis_pos;
}

const Glyph *TextServerAdvanced::shaped_text_get_ellipsis_glyphs(const RID &p_shaped) const {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V_MSG(!sd, nullptr, "ShapedTextDataAdvanced invalid.");

	MutexLock lock(sd->mutex);
	return sd->overrun_trim_data.ellipsis_glyph_buf.ptr();
}

int64_t TextServerAdvanced::shaped_text_get_ellipsis_glyph_count(const RID &p_shaped) const {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V_MSG(!sd, 0, "ShapedTextDataAdvanced invalid.");

	MutexLock lock(sd->mutex);
	return sd->overrun_trim_data.ellipsis_glyph_buf.size();
}

bool TextServerAdvanced::shaped_text_update_breaks(const RID &p_shaped) {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, false);

	MutexLock lock(sd->mutex);
	if (!sd->valid) {
		shaped_text_shape(p_shaped);
	}

	if (sd->line_breaks_valid) {
		return true; // Nothing to do.
	}

	const UChar *data = sd->utf16.get_data();

	if (!sd->break_ops_valid) {
		sd->breaks.clear();
		UErrorCode err = U_ZERO_ERROR;
		int i = 0;
		while (i < sd->spans.size()) {
			String language = sd->spans[i].language;
			int r_start = sd->spans[i].start;
			while (i + 1 < sd->spans.size() && language == sd->spans[i + 1].language) {
				i++;
			}
			int r_end = sd->spans[i].end;
			UBreakIterator *bi = ubrk_open(UBRK_LINE, language.ascii().get_data(), data + _convert_pos_inv(sd, r_start), _convert_pos_inv(sd, r_end - r_start), &err);
			if (U_FAILURE(err)) {
				// No data loaded - use fallback.
				for (int j = r_start; j < r_end; j++) {
					char32_t c = sd->text[j - sd->start];
					if (is_whitespace(c)) {
						sd->breaks[j + 1] = false;
					}
					if (is_linebreak(c)) {
						sd->breaks[j + 1] = true;
					}
				}
			} else {
				while (ubrk_next(bi) != UBRK_DONE) {
					int pos = _convert_pos(sd, ubrk_current(bi)) + r_start;
					if ((ubrk_getRuleStatus(bi) >= UBRK_LINE_HARD) && (ubrk_getRuleStatus(bi) < UBRK_LINE_HARD_LIMIT)) {
						sd->breaks[pos] = true;
					} else if ((ubrk_getRuleStatus(bi) >= UBRK_LINE_SOFT) && (ubrk_getRuleStatus(bi) < UBRK_LINE_SOFT_LIMIT)) {
						sd->breaks[pos] = false;
					}
				}
			}
			ubrk_close(bi);
			i++;
		}
		sd->break_ops_valid = true;
	}

	sd->sort_valid = false;
	sd->glyphs_logical.clear();
	int sd_size = sd->glyphs.size();
	const char32_t *ch = sd->text.ptr();
	Glyph *sd_glyphs = sd->glyphs.ptrw();

	int c_punct_size = sd->custom_punct.length();
	const char32_t *c_punct = sd->custom_punct.ptr();

	for (int i = 0; i < sd_size; i++) {
		if (sd_glyphs[i].count > 0) {
			char32_t c = ch[sd_glyphs[i].start - sd->start];
			if (c == 0xfffc) {
				continue;
			}
			if (c == 0x0009 || c == 0x000b) {
				sd_glyphs[i].flags |= GRAPHEME_IS_TAB;
			}
			if (is_whitespace(c)) {
				sd_glyphs[i].flags |= GRAPHEME_IS_SPACE;
			}
			if (c_punct_size == 0) {
				if (u_ispunct(c) && c != 0x005f) {
					sd_glyphs[i].flags |= GRAPHEME_IS_PUNCTUATION;
				}
			} else {
				for (int j = 0; j < c_punct_size; j++) {
					if (c_punct[j] == c) {
						sd_glyphs[i].flags |= GRAPHEME_IS_PUNCTUATION;
						break;
					}
				}
			}
			if (is_underscore(c)) {
				sd_glyphs[i].flags |= GRAPHEME_IS_UNDERSCORE;
			}
			if (sd->breaks.has(sd_glyphs[i].end)) {
				if (sd->breaks[sd_glyphs[i].end] && (is_linebreak(c))) {
					sd_glyphs[i].flags |= GRAPHEME_IS_BREAK_HARD;
				} else if (is_whitespace(c)) {
					sd_glyphs[i].flags |= GRAPHEME_IS_BREAK_SOFT;
				} else {
					int count = sd_glyphs[i].count;
					// Do not add extra space at the end of the line.
					if (sd_glyphs[i].end == sd->end) {
						continue;
					}
					// Do not add extra space after existing space.
					if (sd_glyphs[i].flags & GRAPHEME_IS_RTL) {
						if ((i + count < sd_size - 1) && ((sd_glyphs[i + count].flags & (GRAPHEME_IS_SPACE | GRAPHEME_IS_BREAK_SOFT)) == (GRAPHEME_IS_SPACE | GRAPHEME_IS_BREAK_SOFT))) {
							continue;
						}
					} else {
						if ((i > 0) && ((sd_glyphs[i - 1].flags & (GRAPHEME_IS_SPACE | GRAPHEME_IS_BREAK_SOFT)) == (GRAPHEME_IS_SPACE | GRAPHEME_IS_BREAK_SOFT))) {
							continue;
						}
					}
					Glyph gl;
					gl.start = sd_glyphs[i].start;
					gl.end = sd_glyphs[i].end;
					gl.count = 1;
					gl.font_rid = sd_glyphs[i].font_rid;
					gl.font_size = sd_glyphs[i].font_size;
					gl.flags = GRAPHEME_IS_BREAK_SOFT | GRAPHEME_IS_VIRTUAL | GRAPHEME_IS_SPACE;
					if (sd_glyphs[i].flags & GRAPHEME_IS_RTL) {
						gl.flags |= GRAPHEME_IS_RTL;
						sd->glyphs.insert(i, gl); // Insert before.
					} else {
						sd->glyphs.insert(i + count, gl); // Insert after.
					}
					i += count;

					// Update write pointer and size.
					sd_size = sd->glyphs.size();
					sd_glyphs = sd->glyphs.ptrw();
					continue;
				}
			}

			i += (sd_glyphs[i].count - 1);
		}
	}

	sd->line_breaks_valid = true;

	return sd->line_breaks_valid;
}

_FORCE_INLINE_ int64_t _generate_kashida_justification_opportunies(const String &p_data, int64_t p_start, int64_t p_end) {
	int64_t kashida_pos = -1;
	int8_t priority = 100;
	int64_t i = p_start;

	char32_t pc = 0;

	while ((p_end > p_start) && is_transparent(p_data[p_end - 1])) {
		p_end--;
	}

	while (i < p_end) {
		uint32_t c = p_data[i];

		if (c == 0x0640) {
			kashida_pos = i;
			priority = 0;
		}
		if (priority >= 1 && i < p_end - 1) {
			if (is_seen_sad(c) && (p_data[i + 1] != 0x200c)) {
				kashida_pos = i;
				priority = 1;
			}
		}
		if (priority >= 2 && i > p_start) {
			if (is_teh_marbuta(c) || is_dal(c) || (is_heh(c) && i == p_end - 1)) {
				if (is_connected_to_prev(c, pc)) {
					kashida_pos = i - 1;
					priority = 2;
				}
			}
		}
		if (priority >= 3 && i > p_start) {
			if (is_alef(c) || ((is_lam(c) || is_tah(c) || is_kaf(c) || is_gaf(c)) && i == p_end - 1)) {
				if (is_connected_to_prev(c, pc)) {
					kashida_pos = i - 1;
					priority = 3;
				}
			}
		}
		if (priority >= 4 && i > p_start && i < p_end - 1) {
			if (is_beh(c)) {
				if (is_reh(p_data[i + 1]) || is_yeh(p_data[i + 1])) {
					if (is_connected_to_prev(c, pc)) {
						kashida_pos = i - 1;
						priority = 4;
					}
				}
			}
		}
		if (priority >= 5 && i > p_start) {
			if (is_waw(c) || ((is_ain(c) || is_qaf(c) || is_feh(c)) && i == p_end - 1)) {
				if (is_connected_to_prev(c, pc)) {
					kashida_pos = i - 1;
					priority = 5;
				}
			}
		}
		if (priority >= 6 && i > p_start) {
			if (is_reh(c)) {
				if (is_connected_to_prev(c, pc)) {
					kashida_pos = i - 1;
					priority = 6;
				}
			}
		}
		if (!is_transparent(c)) {
			pc = c;
		}
		i++;
	}

	return kashida_pos;
}

bool TextServerAdvanced::shaped_text_update_justification_ops(const RID &p_shaped) {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, false);

	MutexLock lock(sd->mutex);
	if (!sd->valid) {
		shaped_text_shape(p_shaped);
	}
	if (!sd->line_breaks_valid) {
		shaped_text_update_breaks(p_shaped);
	}

	if (sd->justification_ops_valid) {
		return true; // Nothing to do.
	}

	const UChar *data = sd->utf16.get_data();
	int data_size = sd->utf16.length();

	if (!sd->js_ops_valid) {
		sd->jstops.clear();

		// Use ICU word iterator and custom kashida detection.
		UErrorCode err = U_ZERO_ERROR;
		UBreakIterator *bi = ubrk_open(UBRK_WORD, "", data, data_size, &err);
		if (U_FAILURE(err)) {
			// No data - use fallback.
			int limit = 0;
			for (int i = 0; i < sd->text.length(); i++) {
				if (is_whitespace(data[i])) {
					int ks = _generate_kashida_justification_opportunies(sd->text, limit, i) + sd->start;
					if (ks != -1) {
						sd->jstops[ks] = true;
					}
					limit = i + 1;
				}
			}
			int ks = _generate_kashida_justification_opportunies(sd->text, limit, sd->text.length()) + sd->start;
			if (ks != -1) {
				sd->jstops[ks] = true;
			}
		} else {
			int limit = 0;
			while (ubrk_next(bi) != UBRK_DONE) {
				if (ubrk_getRuleStatus(bi) != UBRK_WORD_NONE) {
					int i = _convert_pos(sd, ubrk_current(bi));
					sd->jstops[i + sd->start] = false;
					int ks = _generate_kashida_justification_opportunies(sd->text, limit, i);
					if (ks != -1) {
						sd->jstops[ks + sd->start] = true;
					}
					limit = i;
				}
			}
			ubrk_close(bi);
		}

		sd->js_ops_valid = true;
	}

	sd->sort_valid = false;
	sd->glyphs_logical.clear();

	Glyph *sd_glyphs = sd->glyphs.ptrw();
	int sd_size = sd->glyphs.size();
	if (sd->jstops.size() > 0) {
		for (int i = 0; i < sd_size; i++) {
			if (sd_glyphs[i].count > 0) {
				char32_t c = sd->text[sd_glyphs[i].start - sd->start];
				if (c == 0x0640) {
					sd_glyphs[i].flags |= GRAPHEME_IS_ELONGATION;
				}
				if (sd->jstops.has(sd_glyphs[i].start)) {
					if (c == 0xfffc) {
						continue;
					}
					if (sd->jstops[sd_glyphs[i].start]) {
						if (c != 0x0640) {
							if (sd_glyphs[i].font_rid != RID()) {
								Glyph gl = _shape_single_glyph(sd, 0x0640, HB_SCRIPT_ARABIC, HB_DIRECTION_RTL, sd->glyphs[i].font_rid, sd->glyphs[i].font_size);
								if ((sd_glyphs[i].flags & GRAPHEME_IS_VALID) == GRAPHEME_IS_VALID) {
									gl.start = sd_glyphs[i].start;
									gl.end = sd_glyphs[i].end;
									gl.repeat = 0;
									gl.count = 1;
									if (sd->orientation == ORIENTATION_HORIZONTAL) {
										gl.y_off = sd_glyphs[i].y_off;
									} else {
										gl.x_off = sd_glyphs[i].x_off;
									}
									gl.flags |= GRAPHEME_IS_ELONGATION | GRAPHEME_IS_VIRTUAL;
									sd->glyphs.insert(i, gl);
									i++;

									// Update write pointer and size.
									sd_size = sd->glyphs.size();
									sd_glyphs = sd->glyphs.ptrw();
									continue;
								}
							}
						}
					} else if ((sd_glyphs[i].flags & GRAPHEME_IS_SPACE) != GRAPHEME_IS_SPACE) {
						int count = sd_glyphs[i].count;
						// Do not add extra spaces at the end of the line.
						if (sd_glyphs[i].end == sd->end) {
							continue;
						}
						// Do not add extra space after existing space.
						if (sd_glyphs[i].flags & GRAPHEME_IS_RTL) {
							if ((i + count < sd_size - 1) && ((sd_glyphs[i + count].flags & (GRAPHEME_IS_SPACE | GRAPHEME_IS_BREAK_SOFT)) == (GRAPHEME_IS_SPACE | GRAPHEME_IS_BREAK_SOFT))) {
								continue;
							}
						} else {
							if ((i > 0) && ((sd_glyphs[i - 1].flags & (GRAPHEME_IS_SPACE | GRAPHEME_IS_BREAK_SOFT)) == (GRAPHEME_IS_SPACE | GRAPHEME_IS_BREAK_SOFT))) {
								continue;
							}
						}
						// Inject virtual space for alignment.
						Glyph gl;
						gl.start = sd_glyphs[i].start;
						gl.end = sd_glyphs[i].end;
						gl.count = 1;
						gl.font_rid = sd_glyphs[i].font_rid;
						gl.font_size = sd_glyphs[i].font_size;
						gl.flags = GRAPHEME_IS_SPACE | GRAPHEME_IS_VIRTUAL;
						if (sd_glyphs[i].flags & GRAPHEME_IS_RTL) {
							gl.flags |= GRAPHEME_IS_RTL;
							sd->glyphs.insert(i, gl); // Insert before.
						} else {
							sd->glyphs.insert(i + count, gl); // Insert after.
						}
						i += count;

						// Update write pointer and size.
						sd_size = sd->glyphs.size();
						sd_glyphs = sd->glyphs.ptrw();
						continue;
					}
				}
			}
		}
	}

	sd->justification_ops_valid = true;
	return sd->justification_ops_valid;
}

Glyph TextServerAdvanced::_shape_single_glyph(ShapedTextDataAdvanced *p_sd, char32_t p_char, hb_script_t p_script, hb_direction_t p_direction, const RID &p_font, int64_t p_font_size) {
	hb_font_t *hb_font = _font_get_hb_handle(p_font, p_font_size);
	bool subpos = (font_get_subpixel_positioning(p_font) == SUBPIXEL_POSITIONING_ONE_HALF) || (font_get_subpixel_positioning(p_font) == SUBPIXEL_POSITIONING_ONE_QUARTER) || (font_get_subpixel_positioning(p_font) == SUBPIXEL_POSITIONING_AUTO && p_font_size <= SUBPIXEL_POSITIONING_ONE_HALF_MAX_SIZE);
	ERR_FAIL_COND_V(hb_font == nullptr, Glyph());

	hb_buffer_clear_contents(p_sd->hb_buffer);
	hb_buffer_set_direction(p_sd->hb_buffer, p_direction);
	hb_buffer_set_flags(p_sd->hb_buffer, (hb_buffer_flags_t)(HB_BUFFER_FLAG_DEFAULT));
	hb_buffer_set_script(p_sd->hb_buffer, p_script);
	hb_buffer_add_utf32(p_sd->hb_buffer, (const uint32_t *)&p_char, 1, 0, 1);

	hb_shape(hb_font, p_sd->hb_buffer, nullptr, 0);

	unsigned int glyph_count = 0;
	hb_glyph_info_t *glyph_info = hb_buffer_get_glyph_infos(p_sd->hb_buffer, &glyph_count);
	hb_glyph_position_t *glyph_pos = hb_buffer_get_glyph_positions(p_sd->hb_buffer, &glyph_count);

	// Process glyphs.
	Glyph gl;

	if (p_direction == HB_DIRECTION_RTL || p_direction == HB_DIRECTION_BTT) {
		gl.flags |= TextServer::GRAPHEME_IS_RTL;
	}

	gl.font_rid = p_font;
	gl.font_size = p_font_size;

	if (glyph_count > 0) {
		double scale = font_get_scale(p_font, p_font_size);
		if (p_sd->orientation == ORIENTATION_HORIZONTAL) {
			if (subpos) {
				gl.advance = glyph_pos[0].x_advance / (64.0 / scale) + _get_extra_advance(p_font, p_font_size);
			} else {
				gl.advance = Math::round(glyph_pos[0].x_advance / (64.0 / scale) + _get_extra_advance(p_font, p_font_size));
			}
		} else {
			gl.advance = -Math::round(glyph_pos[0].y_advance / (64.0 / scale));
		}
		gl.count = 1;

		gl.index = glyph_info[0].codepoint;
		if (subpos) {
			gl.x_off = glyph_pos[0].x_offset / (64.0 / scale);
		} else {
			gl.x_off = Math::round(glyph_pos[0].x_offset / (64.0 / scale));
		}
		gl.y_off = -Math::round(glyph_pos[0].y_offset / (64.0 / scale));

		if ((glyph_info[0].codepoint != 0) || !u_isgraph(p_char)) {
			gl.flags |= GRAPHEME_IS_VALID;
		}
	}
	return gl;
}

_FORCE_INLINE_ void TextServerAdvanced::_add_featuers(const Dictionary &p_source, Vector<hb_feature_t> &r_ftrs) {
	Array keys = p_source.keys();
	Array values = p_source.values();
	for (int i = 0; i < keys.size(); i++) {
		int32_t value = values[i];
		if (value >= 0) {
			hb_feature_t feature;
			if (keys[i].get_type() == Variant::STRING) {
				feature.tag = name_to_tag(keys[i]);
			} else {
				feature.tag = keys[i];
			}
			feature.value = value;
			feature.start = 0;
			feature.end = -1;
			r_ftrs.push_back(feature);
		}
	}
}

void TextServerAdvanced::_shape_run(ShapedTextDataAdvanced *p_sd, int64_t p_start, int64_t p_end, hb_script_t p_script, hb_direction_t p_direction, Array p_fonts, int64_t p_span, int64_t p_fb_index) {
	int fs = p_sd->spans[p_span].font_size;
	if (p_fb_index >= p_fonts.size()) {
		// Add fallback glyphs.
		for (int i = p_start; i < p_end; i++) {
			if (p_sd->preserve_invalid || (p_sd->preserve_control && is_control(p_sd->text[i]))) {
				Glyph gl;
				gl.start = i + p_sd->start;
				gl.end = i + 1 + p_sd->start;
				gl.count = 1;
				gl.index = p_sd->text[i];
				gl.font_size = fs;
				gl.font_rid = RID();
				if (p_direction == HB_DIRECTION_RTL || p_direction == HB_DIRECTION_BTT) {
					gl.flags |= TextServer::GRAPHEME_IS_RTL;
				}
				if (p_sd->orientation == ORIENTATION_HORIZONTAL) {
					gl.advance = get_hex_code_box_size(fs, gl.index).x;
					p_sd->ascent = MAX(p_sd->ascent, get_hex_code_box_size(fs, gl.index).y);
				} else {
					gl.advance = get_hex_code_box_size(fs, gl.index).y;
					p_sd->ascent = MAX(p_sd->ascent, Math::round(get_hex_code_box_size(fs, gl.index).x * 0.5));
					p_sd->descent = MAX(p_sd->descent, Math::round(get_hex_code_box_size(fs, gl.index).x * 0.5));
				}
				p_sd->width += gl.advance;

				p_sd->glyphs.push_back(gl);
			}
		}
		return;
	}

	RID f = p_fonts[p_fb_index];
	hb_font_t *hb_font = _font_get_hb_handle(f, fs);
	double scale = font_get_scale(f, fs);
	double sp_sp = font_get_spacing(f, fs, SPACING_SPACE);
	double sp_gl = font_get_spacing(f, fs, SPACING_GLYPH);
	double ea = _get_extra_advance(f, fs);
	bool subpos = (font_get_subpixel_positioning(f) == SUBPIXEL_POSITIONING_ONE_HALF) || (font_get_subpixel_positioning(f) == SUBPIXEL_POSITIONING_ONE_QUARTER) || (font_get_subpixel_positioning(f) == SUBPIXEL_POSITIONING_AUTO && fs <= SUBPIXEL_POSITIONING_ONE_HALF_MAX_SIZE);
	ERR_FAIL_COND(hb_font == nullptr);

	hb_buffer_clear_contents(p_sd->hb_buffer);
	hb_buffer_set_direction(p_sd->hb_buffer, p_direction);
	if (p_sd->preserve_control) {
		hb_buffer_set_flags(p_sd->hb_buffer, (hb_buffer_flags_t)(HB_BUFFER_FLAG_PRESERVE_DEFAULT_IGNORABLES | (p_start == 0 ? HB_BUFFER_FLAG_BOT : 0) | (p_end == p_sd->text.length() ? HB_BUFFER_FLAG_EOT : 0)));
	} else {
		hb_buffer_set_flags(p_sd->hb_buffer, (hb_buffer_flags_t)(HB_BUFFER_FLAG_DEFAULT | (p_start == 0 ? HB_BUFFER_FLAG_BOT : 0) | (p_end == p_sd->text.length() ? HB_BUFFER_FLAG_EOT : 0)));
	}
	hb_buffer_set_script(p_sd->hb_buffer, p_script);

	if (!p_sd->spans[p_span].language.is_empty()) {
		hb_language_t lang = hb_language_from_string(p_sd->spans[p_span].language.ascii().get_data(), -1);
		hb_buffer_set_language(p_sd->hb_buffer, lang);
	}

	hb_buffer_add_utf32(p_sd->hb_buffer, (const uint32_t *)p_sd->text.ptr(), p_sd->text.length(), p_start, p_end - p_start);

	Vector<hb_feature_t> ftrs;
	_add_featuers(font_get_opentype_feature_overrides(f), ftrs);
	_add_featuers(p_sd->spans[p_span].features, ftrs);

	hb_shape(hb_font, p_sd->hb_buffer, ftrs.is_empty() ? nullptr : &ftrs[0], ftrs.size());

	unsigned int glyph_count = 0;
	hb_glyph_info_t *glyph_info = hb_buffer_get_glyph_infos(p_sd->hb_buffer, &glyph_count);
	hb_glyph_position_t *glyph_pos = hb_buffer_get_glyph_positions(p_sd->hb_buffer, &glyph_count);

	// Process glyphs.
	if (glyph_count > 0) {
		Glyph *w = (Glyph *)memalloc(glyph_count * sizeof(Glyph));

		int end = (p_direction == HB_DIRECTION_RTL || p_direction == HB_DIRECTION_BTT) ? p_end : 0;
		uint32_t last_cluster_id = UINT32_MAX;
		unsigned int last_cluster_index = 0;
		bool last_cluster_valid = true;

		for (unsigned int i = 0; i < glyph_count; i++) {
			if ((i > 0) && (last_cluster_id != glyph_info[i].cluster)) {
				if (p_direction == HB_DIRECTION_RTL || p_direction == HB_DIRECTION_BTT) {
					end = w[last_cluster_index].start;
				} else {
					for (unsigned int j = last_cluster_index; j < i; j++) {
						w[j].end = glyph_info[i].cluster;
					}
				}
				if (p_direction == HB_DIRECTION_RTL || p_direction == HB_DIRECTION_BTT) {
					w[last_cluster_index].flags |= GRAPHEME_IS_RTL;
				}
				if (last_cluster_valid) {
					w[last_cluster_index].flags |= GRAPHEME_IS_VALID;
				}
				w[last_cluster_index].count = i - last_cluster_index;
				last_cluster_index = i;
				last_cluster_valid = true;
			}

			last_cluster_id = glyph_info[i].cluster;

			Glyph &gl = w[i];
			gl = Glyph();

			gl.start = glyph_info[i].cluster;
			gl.end = end;
			gl.count = 0;

			gl.font_rid = p_fonts[p_fb_index];
			gl.font_size = fs;

			if (glyph_info[i].mask & HB_GLYPH_FLAG_DEFINED) {
				gl.flags |= GRAPHEME_IS_CONNECTED;
			}

			gl.index = glyph_info[i].codepoint;
			if (gl.index != 0) {
				if (p_sd->orientation == ORIENTATION_HORIZONTAL) {
					if (subpos) {
						gl.advance = glyph_pos[i].x_advance / (64.0 / scale) + ea;
					} else {
						gl.advance = Math::round(glyph_pos[i].x_advance / (64.0 / scale) + ea);
					}
				} else {
					gl.advance = -Math::round(glyph_pos[i].y_advance / (64.0 / scale));
				}
				if (subpos) {
					gl.x_off = glyph_pos[i].x_offset / (64.0 / scale);
				} else {
					gl.x_off = Math::round(glyph_pos[i].x_offset / (64.0 / scale));
				}
				gl.y_off = -Math::round(glyph_pos[i].y_offset / (64.0 / scale));
			}
			if (sp_sp && is_whitespace(p_sd->text[glyph_info[i].cluster])) {
				gl.advance += sp_sp;
			} else {
				gl.advance += sp_gl;
			}

			if (p_sd->preserve_control) {
				last_cluster_valid = last_cluster_valid && ((glyph_info[i].codepoint != 0) || (p_sd->text[glyph_info[i].cluster] == 0x0009) || (u_isblank(p_sd->text[glyph_info[i].cluster]) && (gl.advance != 0)) || (!u_isblank(p_sd->text[glyph_info[i].cluster]) && is_linebreak(p_sd->text[glyph_info[i].cluster])));
			} else {
				last_cluster_valid = last_cluster_valid && ((glyph_info[i].codepoint != 0) || (p_sd->text[glyph_info[i].cluster] == 0x0009) || (u_isblank(p_sd->text[glyph_info[i].cluster]) && (gl.advance != 0)) || (!u_isblank(p_sd->text[glyph_info[i].cluster]) && !u_isgraph(p_sd->text[glyph_info[i].cluster])));
			}
		}
		if (p_direction == HB_DIRECTION_LTR || p_direction == HB_DIRECTION_TTB) {
			for (unsigned int j = last_cluster_index; j < glyph_count; j++) {
				w[j].end = p_end;
			}
		}
		w[last_cluster_index].count = glyph_count - last_cluster_index;
		if (p_direction == HB_DIRECTION_RTL || p_direction == HB_DIRECTION_BTT) {
			w[last_cluster_index].flags |= GRAPHEME_IS_RTL;
		}
		if (last_cluster_valid) {
			w[last_cluster_index].flags |= GRAPHEME_IS_VALID;
		}

		// Fallback.
		int failed_subrun_start = p_end + 1;
		int failed_subrun_end = p_start;

		for (unsigned int i = 0; i < glyph_count; i++) {
			if ((w[i].flags & GRAPHEME_IS_VALID) == GRAPHEME_IS_VALID) {
				if (failed_subrun_start != p_end + 1) {
					_shape_run(p_sd, failed_subrun_start, failed_subrun_end, p_script, p_direction, p_fonts, p_span, p_fb_index + 1);
					failed_subrun_start = p_end + 1;
					failed_subrun_end = p_start;
				}
				for (int j = 0; j < w[i].count; j++) {
					if (p_sd->orientation == ORIENTATION_HORIZONTAL) {
						p_sd->ascent = MAX(p_sd->ascent, -w[i + j].y_off);
						p_sd->descent = MAX(p_sd->descent, w[i + j].y_off);
					} else {
						double gla = Math::round(font_get_glyph_advance(f, fs, w[i + j].index).x * 0.5);
						p_sd->ascent = MAX(p_sd->ascent, gla);
						p_sd->descent = MAX(p_sd->descent, gla);
					}
					p_sd->width += w[i + j].advance;
					w[i + j].start += p_sd->start;
					w[i + j].end += p_sd->start;
					p_sd->glyphs.push_back(w[i + j]);
				}
			} else {
				if (failed_subrun_start >= w[i].start) {
					failed_subrun_start = w[i].start;
				}
				if (failed_subrun_end <= w[i].end) {
					failed_subrun_end = w[i].end;
				}
			}
			i += w[i].count - 1;
		}
		memfree(w);
		if (failed_subrun_start != p_end + 1) {
			_shape_run(p_sd, failed_subrun_start, failed_subrun_end, p_script, p_direction, p_fonts, p_span, p_fb_index + 1);
		}
		p_sd->ascent = MAX(p_sd->ascent, font_get_ascent(f, fs));
		p_sd->descent = MAX(p_sd->descent, font_get_descent(f, fs));
		p_sd->upos = MAX(p_sd->upos, font_get_underline_position(f, fs));
		p_sd->uthk = MAX(p_sd->uthk, font_get_underline_thickness(f, fs));
	}
}

bool TextServerAdvanced::shaped_text_shape(const RID &p_shaped) {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, false);

	MutexLock lock(sd->mutex);
	if (sd->valid) {
		return true;
	}

	invalidate(sd, false);
	if (sd->parent != RID()) {
		shaped_text_shape(sd->parent);
		ShapedTextDataAdvanced *parent_sd = shaped_owner.get_or_null(sd->parent);
		ERR_FAIL_COND_V(!parent_sd->valid, false);
		ERR_FAIL_COND_V(!_shape_substr(sd, parent_sd, sd->start, sd->end - sd->start), false);
		return true;
	}

	if (sd->text.length() == 0) {
		sd->valid = true;
		return true;
	}

	sd->utf16 = sd->text.utf16();
	const UChar *data = sd->utf16.get_data();

	// Create script iterator.
	if (sd->script_iter == nullptr) {
		sd->script_iter = memnew(ScriptIterator(sd->text, 0, sd->text.length()));
	}

	if (sd->bidi_override.is_empty()) {
		sd->bidi_override.push_back(Vector2i(sd->start, sd->end));
	}

	for (int ov = 0; ov < sd->bidi_override.size(); ov++) {
		// Create BiDi iterator.
		int start = _convert_pos_inv(sd, sd->bidi_override[ov].x - sd->start);
		int end = _convert_pos_inv(sd, sd->bidi_override[ov].y - sd->start);

		if (start < 0 || end - start > sd->utf16.length()) {
			continue;
		}

		UErrorCode err = U_ZERO_ERROR;
		UBiDi *bidi_iter = ubidi_openSized(end, 0, &err);
		ERR_FAIL_COND_V_MSG(U_FAILURE(err), false, u_errorName(err));

		switch (sd->direction) {
			case DIRECTION_LTR: {
				ubidi_setPara(bidi_iter, data + start, end - start, UBIDI_LTR, nullptr, &err);
				sd->para_direction = DIRECTION_LTR;
			} break;
			case DIRECTION_RTL: {
				ubidi_setPara(bidi_iter, data + start, end - start, UBIDI_RTL, nullptr, &err);
				sd->para_direction = DIRECTION_RTL;
			} break;
			case DIRECTION_AUTO: {
				UBiDiDirection direction = ubidi_getBaseDirection(data + start, end - start);
				if (direction != UBIDI_NEUTRAL) {
					ubidi_setPara(bidi_iter, data + start, end - start, direction, nullptr, &err);
					sd->para_direction = (direction == UBIDI_RTL) ? DIRECTION_RTL : DIRECTION_LTR;
				} else {
					ubidi_setPara(bidi_iter, data + start, end - start, UBIDI_DEFAULT_LTR, nullptr, &err);
					sd->para_direction = DIRECTION_LTR;
				}
			} break;
		}
		ERR_FAIL_COND_V_MSG(U_FAILURE(err), false, u_errorName(err));
		sd->bidi_iter.push_back(bidi_iter);

		err = U_ZERO_ERROR;
		int bidi_run_count = ubidi_countRuns(bidi_iter, &err);
		ERR_FAIL_COND_V_MSG(U_FAILURE(err), false, u_errorName(err));
		for (int i = 0; i < bidi_run_count; i++) {
			int32_t _bidi_run_start = 0;
			int32_t _bidi_run_length = 0;
			hb_direction_t bidi_run_direction = HB_DIRECTION_INVALID;
			bool is_rtl = (ubidi_getVisualRun(bidi_iter, i, &_bidi_run_start, &_bidi_run_length) == UBIDI_LTR);
			switch (sd->orientation) {
				case ORIENTATION_HORIZONTAL: {
					if (is_rtl) {
						bidi_run_direction = HB_DIRECTION_LTR;
					} else {
						bidi_run_direction = HB_DIRECTION_RTL;
					}
				} break;
				case ORIENTATION_VERTICAL: {
					if (is_rtl) {
						bidi_run_direction = HB_DIRECTION_TTB;
					} else {
						bidi_run_direction = HB_DIRECTION_BTT;
					}
				}
			}

			int32_t bidi_run_start = _convert_pos(sd, sd->bidi_override[ov].x - sd->start + _bidi_run_start);
			int32_t bidi_run_end = _convert_pos(sd, sd->bidi_override[ov].x - sd->start + _bidi_run_start + _bidi_run_length);

			// Shape runs.

			int scr_from = (is_rtl) ? 0 : sd->script_iter->script_ranges.size() - 1;
			int scr_to = (is_rtl) ? sd->script_iter->script_ranges.size() : -1;
			int scr_delta = (is_rtl) ? +1 : -1;

			for (int j = scr_from; j != scr_to; j += scr_delta) {
				if ((sd->script_iter->script_ranges[j].start < bidi_run_end) && (sd->script_iter->script_ranges[j].end > bidi_run_start)) {
					int32_t script_run_start = MAX(sd->script_iter->script_ranges[j].start, bidi_run_start);
					int32_t script_run_end = MIN(sd->script_iter->script_ranges[j].end, bidi_run_end);
					char scr_buffer[5] = { 0, 0, 0, 0, 0 };
					hb_tag_to_string(hb_script_to_iso15924_tag(sd->script_iter->script_ranges[j].script), scr_buffer);
					String script = String(scr_buffer);

					int spn_from = (is_rtl) ? 0 : sd->spans.size() - 1;
					int spn_to = (is_rtl) ? sd->spans.size() : -1;
					int spn_delta = (is_rtl) ? +1 : -1;

					for (int k = spn_from; k != spn_to; k += spn_delta) {
						const ShapedTextDataAdvanced::Span &span = sd->spans[k];
						if (span.start - sd->start >= script_run_end || span.end - sd->start <= script_run_start) {
							continue;
						}
						if (span.embedded_key != Variant()) {
							// Embedded object.
							if (sd->orientation == ORIENTATION_HORIZONTAL) {
								sd->objects[span.embedded_key].rect.position.x = sd->width;
								sd->width += sd->objects[span.embedded_key].rect.size.x;
							} else {
								sd->objects[span.embedded_key].rect.position.y = sd->width;
								sd->width += sd->objects[span.embedded_key].rect.size.y;
							}
							Glyph gl;
							gl.start = span.start;
							gl.end = span.end;
							gl.count = 1;
							gl.flags = GRAPHEME_IS_VALID | GRAPHEME_IS_VIRTUAL;
							if (sd->orientation == ORIENTATION_HORIZONTAL) {
								gl.advance = sd->objects[span.embedded_key].rect.size.x;
							} else {
								gl.advance = sd->objects[span.embedded_key].rect.size.y;
							}
							sd->glyphs.push_back(gl);
						} else {
							Array fonts;
							Array fonts_scr_only;
							Array fonts_no_match;
							int font_count = span.fonts.size();
							for (int l = 0; l < font_count; l++) {
								if (font_is_script_supported(span.fonts[l], script)) {
									if (font_is_language_supported(span.fonts[l], span.language)) {
										fonts.push_back(sd->spans[k].fonts[l]);
									} else {
										fonts_scr_only.push_back(sd->spans[k].fonts[l]);
									}
								} else {
									fonts_no_match.push_back(sd->spans[k].fonts[l]);
								}
							}
							fonts.append_array(fonts_scr_only);
							fonts.append_array(fonts_no_match);
							_shape_run(sd, MAX(sd->spans[k].start - sd->start, script_run_start), MIN(sd->spans[k].end - sd->start, script_run_end), sd->script_iter->script_ranges[j].script, bidi_run_direction, fonts, k, 0);
						}
					}
				}
			}
		}
	}

	_realign(sd);
	sd->valid = true;
	return sd->valid;
}

bool TextServerAdvanced::shaped_text_is_ready(const RID &p_shaped) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, false);

	MutexLock lock(sd->mutex);
	return sd->valid;
}

const Glyph *TextServerAdvanced::shaped_text_get_glyphs(const RID &p_shaped) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, nullptr);

	MutexLock lock(sd->mutex);
	if (!sd->valid) {
		const_cast<TextServerAdvanced *>(this)->shaped_text_shape(p_shaped);
	}
	return sd->glyphs.ptr();
}

int64_t TextServerAdvanced::shaped_text_get_glyph_count(const RID &p_shaped) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, 0);

	MutexLock lock(sd->mutex);
	if (!sd->valid) {
		const_cast<TextServerAdvanced *>(this)->shaped_text_shape(p_shaped);
	}
	return sd->glyphs.size();
}

const Glyph *TextServerAdvanced::shaped_text_sort_logical(const RID &p_shaped) {
	ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, nullptr);

	MutexLock lock(sd->mutex);
	if (!sd->valid) {
		const_cast<TextServerAdvanced *>(this)->shaped_text_shape(p_shaped);
	}

	if (!sd->sort_valid) {
		sd->glyphs_logical = sd->glyphs;
		sd->glyphs_logical.sort_custom<GlyphCompare>();
		sd->sort_valid = true;
	}

	return sd->glyphs_logical.ptr();
}

Vector2i TextServerAdvanced::shaped_text_get_range(const RID &p_shaped) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, Vector2i());

	MutexLock lock(sd->mutex);
	return Vector2(sd->start, sd->end);
}

Array TextServerAdvanced::shaped_text_get_objects(const RID &p_shaped) const {
	Array ret;
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, ret);

	MutexLock lock(sd->mutex);
	for (const KeyValue<Variant, ShapedTextDataAdvanced::EmbeddedObject> &E : sd->objects) {
		ret.push_back(E.key);
	}

	return ret;
}

Rect2 TextServerAdvanced::shaped_text_get_object_rect(const RID &p_shaped, const Variant &p_key) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, Rect2());

	MutexLock lock(sd->mutex);
	ERR_FAIL_COND_V(!sd->objects.has(p_key), Rect2());
	if (!sd->valid) {
		const_cast<TextServerAdvanced *>(this)->shaped_text_shape(p_shaped);
	}
	return sd->objects[p_key].rect;
}

Size2 TextServerAdvanced::shaped_text_get_size(const RID &p_shaped) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, Size2());

	MutexLock lock(sd->mutex);
	if (!sd->valid) {
		const_cast<TextServerAdvanced *>(this)->shaped_text_shape(p_shaped);
	}
	if (sd->orientation == TextServer::ORIENTATION_HORIZONTAL) {
		return Size2((sd->text_trimmed ? sd->width_trimmed : sd->width), sd->ascent + sd->descent).ceil();
	} else {
		return Size2(sd->ascent + sd->descent, (sd->text_trimmed ? sd->width_trimmed : sd->width)).ceil();
	}
}

double TextServerAdvanced::shaped_text_get_ascent(const RID &p_shaped) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, 0.0);

	MutexLock lock(sd->mutex);
	if (!sd->valid) {
		const_cast<TextServerAdvanced *>(this)->shaped_text_shape(p_shaped);
	}
	return sd->ascent;
}

double TextServerAdvanced::shaped_text_get_descent(const RID &p_shaped) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, 0.0);

	MutexLock lock(sd->mutex);
	if (!sd->valid) {
		const_cast<TextServerAdvanced *>(this)->shaped_text_shape(p_shaped);
	}
	return sd->descent;
}

double TextServerAdvanced::shaped_text_get_width(const RID &p_shaped) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, 0.0);

	MutexLock lock(sd->mutex);
	if (!sd->valid) {
		const_cast<TextServerAdvanced *>(this)->shaped_text_shape(p_shaped);
	}
	return Math::ceil(sd->text_trimmed ? sd->width_trimmed : sd->width);
}

double TextServerAdvanced::shaped_text_get_underline_position(const RID &p_shaped) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, 0.0);

	MutexLock lock(sd->mutex);
	if (!sd->valid) {
		const_cast<TextServerAdvanced *>(this)->shaped_text_shape(p_shaped);
	}

	return sd->upos;
}

double TextServerAdvanced::shaped_text_get_underline_thickness(const RID &p_shaped) const {
	const ShapedTextDataAdvanced *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, 0.0);

	MutexLock lock(sd->mutex);
	if (!sd->valid) {
		const_cast<TextServerAdvanced *>(this)->shaped_text_shape(p_shaped);
	}

	return sd->uthk;
}

void TextServerAdvanced::_insert_num_systems_lang() {
	// Eastern Arabic numerals.
	{
		NumSystemData ar;
		ar.lang.insert(StringName("ar")); // Arabic
		ar.lang.insert(StringName("ar_AE"));
		ar.lang.insert(StringName("ar_BH"));
		ar.lang.insert(StringName("ar_DJ"));
		ar.lang.insert(StringName("ar_EG"));
		ar.lang.insert(StringName("ar_ER"));
		ar.lang.insert(StringName("ar_IL"));
		ar.lang.insert(StringName("ar_IQ"));
		ar.lang.insert(StringName("ar_JO"));
		ar.lang.insert(StringName("ar_KM"));
		ar.lang.insert(StringName("ar_KW"));
		ar.lang.insert(StringName("ar_LB"));
		ar.lang.insert(StringName("ar_MR"));
		ar.lang.insert(StringName("ar_OM"));
		ar.lang.insert(StringName("ar_PS"));
		ar.lang.insert(StringName("ar_QA"));
		ar.lang.insert(StringName("ar_SA"));
		ar.lang.insert(StringName("ar_SD"));
		ar.lang.insert(StringName("ar_SO"));
		ar.lang.insert(StringName("ar_SS"));
		ar.lang.insert(StringName("ar_SY"));
		ar.lang.insert(StringName("ar_TD"));
		ar.lang.insert(StringName("ar_YE"));
		ar.lang.insert(StringName("ckb")); // Central Kurdish
		ar.lang.insert(StringName("ckb_IQ"));
		ar.lang.insert(StringName("ckb_IR"));
		ar.lang.insert(StringName("sd")); // Sindhi
		ar.lang.insert(StringName("sd_PK"));
		ar.lang.insert(StringName("sd_Arab"));
		ar.lang.insert(StringName("sd_Arab_PK"));
		ar.digits = U"٠١٢٣٤٥٦٧٨٩٫";
		ar.percent_sign = U"٪";
		ar.exp = U"اس";
		num_systems.push_back(ar);
	}

	// Persian and Urdu numerals.
	{
		NumSystemData pr;
		pr.lang.insert(StringName("fa")); // Persian
		pr.lang.insert(StringName("fa_AF"));
		pr.lang.insert(StringName("fa_IR"));
		pr.lang.insert(StringName("ks")); // Kashmiri
		pr.lang.insert(StringName("ks_IN"));
		pr.lang.insert(StringName("ks_Arab"));
		pr.lang.insert(StringName("ks_Arab_IN"));
		pr.lang.insert(StringName("lrc")); // Northern Luri
		pr.lang.insert(StringName("lrc_IQ"));
		pr.lang.insert(StringName("lrc_IR"));
		pr.lang.insert(StringName("mzn")); // Mazanderani
		pr.lang.insert(StringName("mzn_IR"));
		pr.lang.insert(StringName("pa_PK")); // Panjabi
		pr.lang.insert(StringName("pa_Arab"));
		pr.lang.insert(StringName("pa_Arab_PK"));
		pr.lang.insert(StringName("ps")); // Pushto
		pr.lang.insert(StringName("ps_AF"));
		pr.lang.insert(StringName("ps_PK"));
		pr.lang.insert(StringName("ur_IN")); // Urdu
		pr.lang.insert(StringName("uz_AF")); // Uzbek
		pr.lang.insert(StringName("uz_Arab"));
		pr.lang.insert(StringName("uz_Arab_AF"));
		pr.digits = U"۰۱۲۳۴۵۶۷۸۹٫";
		pr.percent_sign = U"٪";
		pr.exp = U"اس";
		num_systems.push_back(pr);
	}

	// Bengali numerals.
	{
		NumSystemData bn;
		bn.lang.insert(StringName("as")); // Assamese
		bn.lang.insert(StringName("as_IN"));
		bn.lang.insert(StringName("bn")); // Bengali
		bn.lang.insert(StringName("bn_BD"));
		bn.lang.insert(StringName("bn_IN"));
		bn.lang.insert(StringName("mni")); // Manipuri
		bn.lang.insert(StringName("mni_IN"));
		bn.lang.insert(StringName("mni_Beng"));
		bn.lang.insert(StringName("mni_Beng_IN"));
		bn.digits = U"০১২৩৪৫৬৭৮৯.";
		bn.percent_sign = U"%";
		bn.exp = U"e";
		num_systems.push_back(bn);
	}

	// Devanagari numerals.
	{
		NumSystemData mr;
		mr.lang.insert(StringName("mr")); // Marathi
		mr.lang.insert(StringName("mr_IN"));
		mr.lang.insert(StringName("ne")); // Nepali
		mr.lang.insert(StringName("ne_IN"));
		mr.lang.insert(StringName("ne_NP"));
		mr.lang.insert(StringName("sa")); // Sanskrit
		mr.lang.insert(StringName("sa_IN"));
		mr.digits = U"०१२३४५६७८९.";
		mr.percent_sign = U"%";
		mr.exp = U"e";
		num_systems.push_back(mr);
	}

	// Dzongkha numerals.
	{
		NumSystemData dz;
		dz.lang.insert(StringName("dz")); // Dzongkha
		dz.lang.insert(StringName("dz_BT"));
		dz.digits = U"༠༡༢༣༤༥༦༧༨༩.";
		dz.percent_sign = U"%";
		dz.exp = U"e";
		num_systems.push_back(dz);
	}

	// Santali numerals.
	{
		NumSystemData sat;
		sat.lang.insert(StringName("sat")); // Santali
		sat.lang.insert(StringName("sat_IN"));
		sat.lang.insert(StringName("sat_Olck"));
		sat.lang.insert(StringName("sat_Olck_IN"));
		sat.digits = U"᱐᱑᱒᱓᱔᱕᱖᱗᱘᱙.";
		sat.percent_sign = U"%";
		sat.exp = U"e";
		num_systems.push_back(sat);
	}

	// Burmese numerals.
	{
		NumSystemData my;
		my.lang.insert(StringName("my")); // Burmese
		my.lang.insert(StringName("my_MM"));
		my.digits = U"၀၁၂၃၄၅၆၇၈၉.";
		my.percent_sign = U"%";
		my.exp = U"e";
		num_systems.push_back(my);
	}

	// Chakma numerals.
	{
		NumSystemData ccp;
		ccp.lang.insert(StringName("ccp")); // Chakma
		ccp.lang.insert(StringName("ccp_BD"));
		ccp.lang.insert(StringName("ccp_IN"));
		ccp.digits = U"𑄶𑄷𑄸𑄹𑄺𑄻𑄼𑄽𑄾𑄿.";
		ccp.percent_sign = U"%";
		ccp.exp = U"e";
		num_systems.push_back(ccp);
	}

	// Adlam numerals.
	{
		NumSystemData ff;
		ff.lang.insert(StringName("ff")); // Fulah
		ff.lang.insert(StringName("ff_Adlm_BF"));
		ff.lang.insert(StringName("ff_Adlm_CM"));
		ff.lang.insert(StringName("ff_Adlm_GH"));
		ff.lang.insert(StringName("ff_Adlm_GM"));
		ff.lang.insert(StringName("ff_Adlm_GN"));
		ff.lang.insert(StringName("ff_Adlm_GW"));
		ff.lang.insert(StringName("ff_Adlm_LR"));
		ff.lang.insert(StringName("ff_Adlm_MR"));
		ff.lang.insert(StringName("ff_Adlm_NE"));
		ff.lang.insert(StringName("ff_Adlm_NG"));
		ff.lang.insert(StringName("ff_Adlm_SL"));
		ff.lang.insert(StringName("ff_Adlm_SN"));
		ff.digits = U"𞥐𞥑𞥒𞥓𞥔𞥕𞥖𞥗𞥘𞥙.";
		ff.percent_sign = U"%";
		ff.exp = U"e";
		num_systems.push_back(ff);
	}
}

String TextServerAdvanced::format_number(const String &p_string, const String &p_language) const {
	const StringName lang = (p_language.is_empty()) ? TranslationServer::get_singleton()->get_tool_locale() : p_language;

	String res = p_string;
	for (int i = 0; i < num_systems.size(); i++) {
		if (num_systems[i].lang.has(lang)) {
			if (num_systems[i].digits.is_empty()) {
				return p_string;
			}
			res.replace("e", num_systems[i].exp);
			res.replace("E", num_systems[i].exp);
			char32_t *data = res.ptrw();
			for (int j = 0; j < res.length(); j++) {
				if (data[j] >= 0x30 && data[j] <= 0x39) {
					data[j] = num_systems[i].digits[data[j] - 0x30];
				} else if (data[j] == '.' || data[j] == ',') {
					data[j] = num_systems[i].digits[10];
				}
			}
			break;
		}
	}
	return res;
}

String TextServerAdvanced::parse_number(const String &p_string, const String &p_language) const {
	const StringName lang = (p_language.is_empty()) ? TranslationServer::get_singleton()->get_tool_locale() : p_language;

	String res = p_string;
	for (int i = 0; i < num_systems.size(); i++) {
		if (num_systems[i].lang.has(lang)) {
			if (num_systems[i].digits.is_empty()) {
				return p_string;
			}
			res.replace(num_systems[i].exp, "e");
			char32_t *data = res.ptrw();
			for (int j = 0; j < res.length(); j++) {
				if (data[j] == num_systems[i].digits[10]) {
					data[j] = '.';
				} else {
					for (int k = 0; k < 10; k++) {
						if (data[j] == num_systems[i].digits[k]) {
							data[j] = 0x30 + k;
						}
					}
				}
			}
			break;
		}
	}
	return res;
}

String TextServerAdvanced::percent_sign(const String &p_language) const {
	const StringName lang = (p_language.is_empty()) ? TranslationServer::get_singleton()->get_tool_locale() : p_language;

	for (int i = 0; i < num_systems.size(); i++) {
		if (num_systems[i].lang.has(lang)) {
			if (num_systems[i].percent_sign.is_empty()) {
				return "%";
			}
			return num_systems[i].percent_sign;
		}
	}
	return "%";
}

String TextServerAdvanced::strip_diacritics(const String &p_string) const {
	UErrorCode err = U_ZERO_ERROR;

	// Get NFKD normalizer singleton.
	const UNormalizer2 *unorm = unorm2_getNFKDInstance(&err);
	ERR_FAIL_COND_V_MSG(U_FAILURE(err), TextServer::strip_diacritics(p_string), u_errorName(err));

	// Convert to UTF-16.
	Char16String utf16 = p_string.utf16();

	// Normalize.
	Vector<char16_t> normalized;
	err = U_ZERO_ERROR;
	int32_t len = unorm2_normalize(unorm, utf16.get_data(), -1, nullptr, 0, &err);
	ERR_FAIL_COND_V_MSG(err != U_BUFFER_OVERFLOW_ERROR, TextServer::strip_diacritics(p_string), u_errorName(err));
	normalized.resize(len);
	err = U_ZERO_ERROR;
	unorm2_normalize(unorm, utf16.get_data(), -1, normalized.ptrw(), len, &err);
	ERR_FAIL_COND_V_MSG(U_FAILURE(err), TextServer::strip_diacritics(p_string), u_errorName(err));

	// Convert back to UTF-32.
	String normalized_string = String::utf16(normalized.ptr(), len);

	// Strip combining characters.
	String result;
	for (int i = 0; i < normalized_string.length(); i++) {
		if (u_getCombiningClass(normalized_string[i]) == 0) {
			result = result + normalized_string[i];
		}
	}
	return result;
}

String TextServerAdvanced::string_to_upper(const String &p_string, const String &p_language) const {
	// Convert to UTF-16.
	Char16String utf16 = p_string.utf16();

	Vector<char16_t> upper;
	UErrorCode err = U_ZERO_ERROR;
	int32_t len = u_strToUpper(nullptr, 0, utf16.get_data(), -1, p_language.ascii().get_data(), &err);
	ERR_FAIL_COND_V_MSG(err != U_BUFFER_OVERFLOW_ERROR, p_string, u_errorName(err));
	upper.resize(len);
	err = U_ZERO_ERROR;
	u_strToUpper(upper.ptrw(), len, utf16.get_data(), -1, p_language.ascii().get_data(), &err);
	ERR_FAIL_COND_V_MSG(U_FAILURE(err), p_string, u_errorName(err));

	// Convert back to UTF-32.
	return String::utf16(upper.ptr(), len);
}

String TextServerAdvanced::string_to_lower(const String &p_string, const String &p_language) const {
	// Convert to UTF-16.
	Char16String utf16 = p_string.utf16();

	Vector<char16_t> lower;
	UErrorCode err = U_ZERO_ERROR;
	int32_t len = u_strToLower(nullptr, 0, utf16.get_data(), -1, p_language.ascii().get_data(), &err);
	ERR_FAIL_COND_V_MSG(err != U_BUFFER_OVERFLOW_ERROR, p_string, u_errorName(err));
	lower.resize(len);
	err = U_ZERO_ERROR;
	u_strToLower(lower.ptrw(), len, utf16.get_data(), -1, p_language.ascii().get_data(), &err);
	ERR_FAIL_COND_V_MSG(U_FAILURE(err), p_string, u_errorName(err));

	// Convert back to UTF-32.
	return String::utf16(lower.ptr(), len);
}

TextServerAdvanced::TextServerAdvanced() {
	_insert_num_systems_lang();
	_insert_feature_sets();
	_bmp_create_font_funcs();
}

TextServerAdvanced::~TextServerAdvanced() {
	_bmp_free_font_funcs();
	if (ft_library != nullptr) {
		FT_Done_FreeType(ft_library);
	}
	u_cleanup();
}