libharfbuzz-dev \

        # perl-IPC-Cmd, wget, and zip are needed to run vcpkg.

        # autoconf-archive is needed to build ICU.

          autoconf-archive \

        # aclocal looks first in /usr/local/share/aclocal, and if that doesn't

        # exist only looks in /usr/share/aclocal. We have files in both that

        # are important. So copy the latter to the first, and we are good to

        # go.

        cp /usr/share/aclocal/* /usr/local/share/aclocal/

            harfbuzz \

            icu \

            find_package(Harfbuzz)

            find_package(ICU OPTIONAL_COMPONENTS i18n)

    if(HARFBUZZ_FOUND AND NOT ICU_i18n_FOUND)

        message(WARNING "HarfBuzz depends on ICU i18n to function; HarfBuzz will be disabled")

    endif()

    if(NOT HARFBUZZ_FOUND)

        message(WARNING "Without HarfBuzz and ICU i18n the game will not be able to render right-to-left languages correctly")

    endif()

    link_package(Harfbuzz TARGET harfbuzz::harfbuzz)

- harfbuzz: handling of right-to-left scripts (e.g. Arabic and Persian) (required libicu)

                         WITH_HARFBUZZ \

The icu scriptrun implementation in `src/3rdparty/icu` is licensed under the Unicode license.

See `src/3rdparty/icu/LICENSE` for the complete license text.

#[=======================================================================[.rst:

FindHarfBuzz

-------

Finds the harfbuzz library.

Result Variables

^^^^^^^^^^^^^^^^

This will define the following variables:

``Harfbuzz_FOUND``

  True if the system has the harfbuzz library.

``Harfbuzz_INCLUDE_DIRS``

  Include directories needed to use harfbuzz.

``Harfbuzz_LIBRARIES``

  Libraries needed to link to harfbuzz.

``Harfbuzz_VERSION``

  The version of the harfbuzz library which was found.

Cache Variables

^^^^^^^^^^^^^^^

The following cache variables may also be set:

``Harfbuzz_INCLUDE_DIR``

  The directory containing ``hb.h``.

``Harfbuzz_LIBRARY``

  The path to the harfbuzz library.

#]=======================================================================]

find_package(PkgConfig QUIET)

pkg_check_modules(PC_Harfbuzz QUIET harfbuzz)

find_path(Harfbuzz_INCLUDE_DIR

    NAMES hb.h

    PATHS ${PC_Harfbuzz_INCLUDE_DIRS}

)

find_library(Harfbuzz_LIBRARY

    NAMES harfbuzz

    PATHS ${PC_Harfbuzz_LIBRARY_DIRS}

)

set(Harfbuzz_VERSION ${PC_Harfbuzz_VERSION})

include(FindPackageHandleStandardArgs)

find_package_handle_standard_args(Harfbuzz

    FOUND_VAR Harfbuzz_FOUND

    REQUIRED_VARS

        Harfbuzz_LIBRARY

        Harfbuzz_INCLUDE_DIR

    VERSION_VAR Harfbuzz_VERSION

)

if(Harfbuzz_FOUND)

    set(Harfbuzz_LIBRARIES ${Harfbuzz_LIBRARY})

    set(Harfbuzz_INCLUDE_DIRS ${Harfbuzz_INCLUDE_DIR})

endif()

mark_as_advanced(

    Harfbuzz_INCLUDE_DIR

    Harfbuzz_LIBRARY

)

Accepted components are: uc, i18n, le, lx, io, data

set(ICU_KNOWN_COMPONENTS "uc" "i18n" "le" "lx" "io" "data")

add_subdirectory(icu)

add_files(

    scriptrun.cpp

    scriptrun.h

    CONDITION ICU_i18n_FOUND

)

UNICODE, INC. LICENSE AGREEMENT - DATA FILES AND SOFTWARE

See Terms of Use <https://www.unicode.org/copyright.html>

for definitions of Unicode Inc.’s Data Files and Software.

NOTICE TO USER: Carefully read the following legal agreement.

BY DOWNLOADING, INSTALLING, COPYING OR OTHERWISE USING UNICODE INC.'S

DATA FILES ("DATA FILES"), AND/OR SOFTWARE ("SOFTWARE"),

YOU UNEQUIVOCALLY ACCEPT, AND AGREE TO BE BOUND BY, ALL OF THE

TERMS AND CONDITIONS OF THIS AGREEMENT.

IF YOU DO NOT AGREE, DO NOT DOWNLOAD, INSTALL, COPY, DISTRIBUTE OR USE

THE DATA FILES OR SOFTWARE.

COPYRIGHT AND PERMISSION NOTICE

Copyright © 1991-2023 Unicode, Inc. All rights reserved.

Distributed under the Terms of Use in https://www.unicode.org/copyright.html.

Permission is hereby granted, free of charge, to any person obtaining

a copy of the Unicode data files and any associated documentation

(the "Data Files") or Unicode software and any associated documentation

(the "Software") to deal in the Data Files or Software

without restriction, including without limitation the rights to use,

copy, modify, merge, publish, distribute, and/or sell copies of

the Data Files or Software, and to permit persons to whom the Data Files

or Software are furnished to do so, provided that either

(a) this copyright and permission notice appear with all copies

of the Data Files or Software, or

(b) this copyright and permission notice appear in associated

Documentation.

THE DATA FILES AND SOFTWARE ARE 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 OF THIRD PARTY RIGHTS.

IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS

NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL

DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,

DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER

TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR

PERFORMANCE OF THE DATA FILES OR SOFTWARE.

Except as contained in this notice, the name of a copyright holder

shall not be used in advertising or otherwise to promote the sale,

use or other dealings in these Data Files or Software without prior

written authorization of the copyright holder.

// © 2016 and later: Unicode, Inc. and others.

// License & terms of use: http://www.unicode.org/copyright.html

/*

 *******************************************************************************

 *

 *   Copyright (C) 1999-2016, International Business Machines

 *   Corporation and others.  All Rights Reserved.

 *

 *******************************************************************************

 *   file name:  scrptrun.cpp

 *

 *   created on: 10/17/2001

 *   created by: Eric R. Mader

 */

#include <unicode/utypes.h>

#include <unicode/uscript.h>

#include "scriptrun.h"

// Copied from cmemory.h

#define UPRV_LENGTHOF(array) (int32_t)(sizeof(array)/sizeof((array)[0]))

U_NAMESPACE_BEGIN

const char ScriptRun::fgClassID=0;

UChar32 ScriptRun::pairedChars[] = {

    0x0028, 0x0029, // ascii paired punctuation

    0x003c, 0x003e,

    0x005b, 0x005d,

    0x007b, 0x007d,

    0x00ab, 0x00bb, // guillemets

    0x2018, 0x2019, // general punctuation

    0x201c, 0x201d,

    0x2039, 0x203a,

    0x3008, 0x3009, // chinese paired punctuation

    0x300a, 0x300b,

    0x300c, 0x300d,

    0x300e, 0x300f,

    0x3010, 0x3011,

    0x3014, 0x3015,

    0x3016, 0x3017,

    0x3018, 0x3019,

    0x301a, 0x301b

};

const int32_t ScriptRun::pairedCharCount = UPRV_LENGTHOF(pairedChars);

const int32_t ScriptRun::pairedCharPower = 1 << highBit(pairedCharCount);

const int32_t ScriptRun::pairedCharExtra = pairedCharCount - pairedCharPower;

int8_t ScriptRun::highBit(int32_t value)

{

    if (value <= 0) {

        return -32;

    }

    int8_t bit = 0;

    if (value >= 1 << 16) {

        value >>= 16;

        bit += 16;

    }

    if (value >= 1 << 8) {

        value >>= 8;

        bit += 8;

    }

    if (value >= 1 << 4) {

        value >>= 4;

        bit += 4;

    }

    if (value >= 1 << 2) {

        value >>= 2;

        bit += 2;

    }

    if (value >= 1 << 1) {

        value >>= 1;

        bit += 1;

    }

    return bit;

}

int32_t ScriptRun::getPairIndex(UChar32 ch)

{

    int32_t probe = pairedCharPower;

    int32_t index = 0;

    if (ch >= pairedChars[pairedCharExtra]) {

        index = pairedCharExtra;

    }

    while (probe > (1 << 0)) {

        probe >>= 1;

        if (ch >= pairedChars[index + probe]) {

            index += probe;

        }

    }

    if (pairedChars[index] != ch) {

        index = -1;

    }

    return index;

}

UBool ScriptRun::sameScript(int32_t scriptOne, int32_t scriptTwo)

{

    return scriptOne <= USCRIPT_INHERITED || scriptTwo <= USCRIPT_INHERITED || scriptOne == scriptTwo;

}

UBool ScriptRun::next()

{

    int32_t startSP  = parenSP;  // used to find the first new open character

    UErrorCode error = U_ZERO_ERROR;

    // if we've fallen off the end of the text, we're done

    if (scriptEnd >= charLimit) {

        return false;

    }

    scriptCode = USCRIPT_COMMON;

    for (scriptStart = scriptEnd; scriptEnd < charLimit; scriptEnd += 1) {

        char16_t   high = charArray[scriptEnd];

        UChar32 ch   = high;

        // if the character is a high surrogate and it's not the last one

        // in the text, see if it's followed by a low surrogate

        if (high >= 0xD800 && high <= 0xDBFF && scriptEnd < charLimit - 1)

        {

            char16_t low = charArray[scriptEnd + 1];

            // if it is followed by a low surrogate,

            // consume it and form the full character

            if (low >= 0xDC00 && low <= 0xDFFF) {

                ch = (high - 0xD800) * 0x0400 + low - 0xDC00 + 0x10000;

                scriptEnd += 1;

            }

        }

        UScriptCode sc = uscript_getScript(ch, &error);

        int32_t pairIndex = getPairIndex(ch);

        // Paired character handling:

        //

        // if it's an open character, push it onto the stack.

        // if it's a close character, find the matching open on the

        // stack, and use that script code. Any non-matching open

        // characters above it on the stack will be poped.

        if (pairIndex >= 0) {

            if ((pairIndex & 1) == 0) {

                parenStack[++parenSP].pairIndex = pairIndex;

                parenStack[parenSP].scriptCode  = scriptCode;

            } else if (parenSP >= 0) {

                int32_t pi = pairIndex & ~1;

                while (parenSP >= 0 && parenStack[parenSP].pairIndex != pi) {

                    parenSP -= 1;

                }

                if (parenSP < startSP) {

                    startSP = parenSP;

                }

                if (parenSP >= 0) {

                    sc = parenStack[parenSP].scriptCode;

                }

            }

        }

        if (sameScript(scriptCode, sc)) {

            if (scriptCode <= USCRIPT_INHERITED && sc > USCRIPT_INHERITED) {

                scriptCode = sc;

                // now that we have a final script code, fix any open

                // characters we pushed before we knew the script code.

                while (startSP < parenSP) {

                    parenStack[++startSP].scriptCode = scriptCode;

                }

            }

            // if this character is a close paired character,

            // pop it from the stack

            if (pairIndex >= 0 && (pairIndex & 1) != 0 && parenSP >= 0) {

                parenSP -= 1;

                startSP -= 1;

            }

        } else {

            // if the run broke on a surrogate pair,

            // end it before the high surrogate

            if (ch >= 0x10000) {

                scriptEnd -= 1;

            }

            break;

        }

    }

    return true;

}

U_NAMESPACE_END

// © 2016 and later: Unicode, Inc. and others.

// License & terms of use: http://www.unicode.org/copyright.html

/*

 *******************************************************************************

 *

 *   Copyright (C) 1999-2003, International Business Machines

 *   Corporation and others.  All Rights Reserved.

 *

 *******************************************************************************

 *   file name:  scrptrun.h

 *

 *   created on: 10/17/2001

 *   created by: Eric R. Mader

 */

#ifndef __SCRPTRUN_H

#define __SCRPTRUN_H

#include <unicode/utypes.h>

#include <unicode/uobject.h>

#include <unicode/uscript.h>

U_NAMESPACE_BEGIN

struct ScriptRecord

{

    UChar32 startChar;

    UChar32 endChar;

    UScriptCode scriptCode;

};

struct ParenStackEntry

{

    int32_t pairIndex;

    UScriptCode scriptCode;

};

class ScriptRun : public UObject {

public:

    ScriptRun();

    ScriptRun(const char16_t *chars, int32_t length);

    ScriptRun(const char16_t *chars, int32_t start, int32_t length);

    void reset();

    void reset(int32_t start, int32_t count);

    void reset(const char16_t *chars, int32_t start, int32_t length);

    int32_t getScriptStart();

    int32_t getScriptEnd();

    UScriptCode getScriptCode();

    UBool next();

    /**

     * ICU "poor man's RTTI", returns a UClassID for the actual class.

     *

     * @stable ICU 2.2

     */

    virtual inline UClassID getDynamicClassID() const override { return getStaticClassID(); }

    /**

     * ICU "poor man's RTTI", returns a UClassID for this class.

     *

     * @stable ICU 2.2

     */

    static inline UClassID getStaticClassID() { return (UClassID)const_cast<char *>(&fgClassID); }

private:

    static UBool sameScript(int32_t scriptOne, int32_t scriptTwo);

    int32_t charStart;

    int32_t charLimit;

    const char16_t *charArray;

    int32_t scriptStart;

    int32_t scriptEnd;

    UScriptCode scriptCode;

    ParenStackEntry parenStack[128];

    int32_t parenSP;

    static int8_t highBit(int32_t value);

    static int32_t getPairIndex(UChar32 ch);

    static UChar32 pairedChars[];

    static const int32_t pairedCharCount;

    static const int32_t pairedCharPower;

    static const int32_t pairedCharExtra;

    /**

     * The address of this static class variable serves as this class's ID

     * for ICU "poor man's RTTI".

     */

    static const char fgClassID;

};

inline ScriptRun::ScriptRun()

{

    reset(nullptr, 0, 0);

}

inline ScriptRun::ScriptRun(const char16_t *chars, int32_t length)

{

    reset(chars, 0, length);

}

inline ScriptRun::ScriptRun(const char16_t *chars, int32_t start, int32_t length)

{

    reset(chars, start, length);

}

inline int32_t ScriptRun::getScriptStart()

{

    return scriptStart;

}

inline int32_t ScriptRun::getScriptEnd()

{

    return scriptEnd;

}

inline UScriptCode ScriptRun::getScriptCode()

{

    return scriptCode;

}

inline void ScriptRun::reset()

{

    scriptStart = charStart;

    scriptEnd   = charStart;

    scriptCode  = USCRIPT_INVALID_CODE;

    parenSP     = -1;

}

inline void ScriptRun::reset(int32_t start, int32_t length)

{

    charStart = start;

    charLimit = start + length;

    reset();

}

inline void ScriptRun::reset(const char16_t *chars, int32_t start, int32_t length)

{

    charArray = chars;

    reset(start, length);

}

U_NAMESPACE_END

#endif

    CONDITION ICU_i18n_FOUND AND HARFBUZZ_FOUND

#ifdef WITH_HARFBUZZ

#	include <hb.h>

#endif /* WITH_HARFBUZZ */

#ifdef WITH_ICU_I18N

#endif /* WITH_ICU_I18N */

#if defined(WITH_HARFBUZZ)

	buffer += seprintf(buffer, last, " HarfBuzz:   %s\n", hb_version_string());

#endif /* WITH_HARFBUZZ */

#if defined(WITH_ICU_I18N)

#endif /* WITH_ICU_I18N */

	const void *InternalGetFontTable(uint32 tag, size_t &length) override;

	const Sprite *InternalGetGlyph(GlyphID key, bool aa) override;

	void ClearFontCache() override;

	GlyphID MapCharToGlyph(WChar key) override;

	const char *GetFontName() override { return face->family_name; }

	bool IsBuiltInFont() override { return false; }

	const void *GetOSHandle() override { return &face; }

#if defined(WITH_ICU_I18N) && defined(WITH_HARFBUZZ)

#endif /* WITH_ICU_I18N && WITH_HARFBUZZ */