/*

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

 *

 *   Copyright (C) 1999-2004, International Business Machines

 *   Corporation and others.  All Rights Reserved.

 *

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

 *   file name:  LEFontInstance.cpp

 *

 *   created on: 02/06/2003

 *   created by: Eric R. Mader

 */

#include "LETypes.h"

#include "LEScripts.h"

#include "LEFontInstance.h"

#include "LEGlyphStorage.h"

U_NAMESPACE_BEGIN

UOBJECT_DEFINE_RTTI_IMPLEMENTATION(LEFontInstance)

const LEFontInstance *LEFontInstance::getSubFont(const LEUnicode chars[], le_int32 *offset, le_int32 limit,

                                                       le_int32 script, LEErrorCode &success) const

{

    if (LE_FAILURE(success)) {

        return NULL;

    }

    if (chars == NULL || *offset < 0 || limit < 0 || *offset >= limit || script < 0 || script >= scriptCodeCount) {

        success = LE_ILLEGAL_ARGUMENT_ERROR;

        return NULL;

    }

    *offset = limit;

    return this;

}

void LEFontInstance::mapCharsToGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count,

                                      le_bool reverse, const LECharMapper *mapper, LEGlyphStorage &glyphStorage) const

{

    le_int32 i, out = 0, dir = 1;

    if (reverse) {

        out = count - 1;

        dir = -1;

    }

    for (i = offset; i < offset + count; i += 1, out += dir) {

        LEUnicode16 high = chars[i];

        LEUnicode32 code = high;

        if (i < offset + count - 1 && high >= 0xD800 && high <= 0xDBFF) {

            LEUnicode16 low = chars[i + 1];

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

                code = (high - 0xD800) * 0x400 + low - 0xDC00 + 0x10000;

            }

        }

        glyphStorage[out] = mapCharToGlyph(code, mapper);

        if (code >= 0x10000) {

            i += 1;

            glyphStorage[out += dir] = 0xFFFF;

        }

    }

}

LEGlyphID LEFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const

{

    LEUnicode32 mappedChar = mapper->mapChar(ch);

    if (mappedChar == 0xFFFE || mappedChar == 0xFFFF) {

        return 0xFFFF;

    }

    if (mappedChar == 0x200C/* || mappedChar == 0x200D*/) { //1922 mlyl --> commented 200D for chillu -->

        return 1;

    }

    return mapCharToGlyph(mappedChar);

}

U_NAMESPACE_END