openmw/components/fontloader/fontloader.cpp

#include "fontloader.hpp"

#include <array>
#include <stdexcept>
#include <string_view>

#include <osg/Image>

#include <osgDB/WriteFile>

#include <MyGUI_FactoryManager.h>
#include <MyGUI_RenderManager.h>
#include <MyGUI_ResourceManager.h>
#include <MyGUI_ResourceManualFont.h>
#include <MyGUI_ResourceTrueTypeFont.h>
#include <MyGUI_XmlDocument.h>

#include <components/debug/debuglog.hpp>

#include <components/fallback/fallback.hpp>

#include <components/vfs/manager.hpp>

#include <components/misc/strings/algorithm.hpp>

#include <components/myguiplatform/scalinglayer.hpp>

#include <components/settings/settings.hpp>

namespace
{
    MyGUI::xml::ElementPtr getProperty(MyGUI::xml::ElementPtr resourceNode, const std::string propertyName)
    {
        MyGUI::xml::ElementPtr propertyNode = nullptr;
        MyGUI::xml::ElementEnumerator propertyIterator = resourceNode->getElementEnumerator();
        while (propertyIterator.next("Property"))
        {
            std::string key = propertyIterator->findAttribute("key");

            if (key == propertyName)
            {
                propertyNode = propertyIterator.current();
                break;
            }
        }

        return propertyNode;
    }

    MyGUI::IntSize getBookSize(MyGUI::IDataStream* layersStream)
    {
        MyGUI::xml::Document xmlDocument;
        xmlDocument.open(layersStream);
        MyGUI::xml::ElementPtr root = xmlDocument.getRoot();
        MyGUI::xml::ElementEnumerator layersIterator = root->getElementEnumerator();
        while (layersIterator.next("Layer"))
        {
            std::string name = layersIterator->findAttribute("name");

            if (name == "JournalBooks")
            {
                MyGUI::xml::ElementPtr sizeProperty = getProperty(layersIterator.current(), "Size");
                const std::string& sizeValue
                    = sizeProperty != nullptr ? sizeProperty->findAttribute("value") : std::string();
                if (!sizeValue.empty())
                    return MyGUI::IntSize::parse(sizeValue);
            }
        }

        return MyGUI::RenderManager::getInstance().getViewSize();
    }

    unsigned long utf8ToUnicode(std::string_view utf8)
    {
        if (utf8.empty())
            return 0;
        size_t i = 0;
        unsigned long unicode;
        size_t numbytes;
        unsigned char ch = utf8[i++];
        if (ch <= 0x7F)
        {
            unicode = ch;
            numbytes = 0;
        }
        else if (ch <= 0xBF)
        {
            throw std::logic_error("not a UTF-8 string");
        }
        else if (ch <= 0xDF)
        {
            unicode = ch & 0x1F;
            numbytes = 1;
        }
        else if (ch <= 0xEF)
        {
            unicode = ch & 0x0F;
            numbytes = 2;
        }
        else if (ch <= 0xF7)
        {
            unicode = ch & 0x07;
            numbytes = 3;
        }
        else
        {
            throw std::logic_error("not a UTF-8 string");
        }
        for (size_t j = 0; j < numbytes; ++j)
        {
            ch = utf8[i++];
            if (ch < 0x80 || ch > 0xBF)
                throw std::logic_error("not a UTF-8 string");
            unicode <<= 6;
            unicode += ch & 0x3F;
        }
        if (unicode >= 0xD800 && unicode <= 0xDFFF)
            throw std::logic_error("not a UTF-8 string");
        if (unicode > 0x10FFFF)
            throw std::logic_error("not a UTF-8 string");

        return unicode;
    }

    /// This is a hack for Polish font
    unsigned char mapUtf8Char(unsigned char c)
    {
        switch (c)
        {
            case 0x80:
                return 0xc6;
            case 0x81:
                return 0x9c;
            case 0x82:
                return 0xe6;
            case 0x83:
                return 0xb3;
            case 0x84:
                return 0xf1;
            case 0x85:
                return 0xb9;
            case 0x86:
                return 0xbf;
            case 0x87:
                return 0x9f;
            case 0x88:
                return 0xea;
            case 0x89:
                return 0xea;
            case 0x8a:
                return 0x00; // not contained in win1250
            case 0x8b:
                return 0x00; // not contained in win1250
            case 0x8c:
                return 0x8f;
            case 0x8d:
                return 0xaf;
            case 0x8e:
                return 0xa5;
            case 0x8f:
                return 0x8c;
            case 0x90:
                return 0xca;
            case 0x93:
                return 0xa3;
            case 0x94:
                return 0xf6;
            case 0x95:
                return 0xf3;
            case 0x96:
                return 0xaf;
            case 0x97:
                return 0x8f;
            case 0x99:
                return 0xd3;
            case 0x9a:
                return 0xd1;
            case 0x9c:
                return 0x00; // not contained in win1250
            case 0xa0:
                return 0xb9;
            case 0xa1:
                return 0xaf;
            case 0xa2:
                return 0xf3;
            case 0xa3:
                return 0xbf;
            case 0xa4:
                return 0x00; // not contained in win1250
            case 0xe1:
                return 0x8c;
            case 0xe3:
                return 0x00; // not contained in win1250
            case 0xf5:
                return 0x00; // not contained in win1250
            default:
                return c;
        }
    }

    // getUnicode includes various hacks for dealing with Morrowind's .fnt files that are *mostly*
    // in the expected win12XX encoding, but also have randomly swapped characters sometimes.
    // Looks like the Morrowind developers found standard encodings too boring and threw in some twists for fun.
    unsigned long getUnicode(unsigned char c, ToUTF8::Utf8Encoder& encoder, ToUTF8::FromType encoding)
    {
        if (encoding == ToUTF8::WINDOWS_1250) // Hack for polish font
        {
            const std::array<char, 2> str{ static_cast<char>(mapUtf8Char(c)), '\0' };
            return utf8ToUnicode(encoder.getUtf8(std::string_view(str.data(), 1)));
        }
        else
        {
            const std::array<char, 2> str{ static_cast<char>(c), '\0' };
            return utf8ToUnicode(encoder.getUtf8(std::string_view(str.data(), 1)));
        }
    }

    [[noreturn]] void fail(std::istream& stream, const std::string& fileName, const std::string& message)
    {
        std::stringstream error;
        error << "Font loading error: " << message;
        error << "\n  File: " << fileName;
        error << "\n  Offset: 0x" << std::hex << stream.tellg();
        throw std::runtime_error(error.str());
    }

}

namespace Gui
{

    FontLoader::FontLoader(ToUTF8::FromType encoding, const VFS::Manager* vfs, float scalingFactor)
        : mVFS(vfs)
        , mFontHeight(std::clamp(Settings::Manager::getInt("font size", "GUI"), 12, 18))
        , mScalingFactor(scalingFactor)
    {
        if (encoding == ToUTF8::WINDOWS_1252)
            mEncoding = ToUTF8::CP437;
        else
            mEncoding = encoding;

        MyGUI::ResourceManager::getInstance().unregisterLoadXmlDelegate("Resource");
        MyGUI::ResourceManager::getInstance().registerLoadXmlDelegate("Resource")
            = MyGUI::newDelegate(this, &FontLoader::overrideLineHeight);

        loadFonts();
    }

    void FontLoader::loadFonts()
    {
        std::string defaultFont{ Fallback::Map::getString("Fonts_Font_0") };
        std::string scrollFont{ Fallback::Map::getString("Fonts_Font_2") };
        loadFont(defaultFont, "DefaultFont");
        loadFont(scrollFont, "ScrollFont");
        loadFont("DejaVuLGCSansMono",
            "MonoFont"); // We need to use a TrueType monospace font to display debug texts properly.

        // Use our TrueType fonts as a fallback.
        if (!MyGUI::ResourceManager::getInstance().isExist("DefaultFont")
            && !Misc::StringUtils::ciEqual(defaultFont, "MysticCards"))
            loadFont("MysticCards", "DefaultFont");
        if (!MyGUI::ResourceManager::getInstance().isExist("ScrollFont")
            && !Misc::StringUtils::ciEqual(scrollFont, "DemonicLetters"))
            loadFont("DemonicLetters", "ScrollFont");
    }

    void FontLoader::loadFont(const std::string& fileName, const std::string& fontId)
    {
        if (mVFS->exists("fonts/" + fileName + ".fnt"))
            loadBitmapFont(fileName + ".fnt", fontId);
        else if (mVFS->exists("fonts/" + fileName + ".omwfont"))
            loadTrueTypeFont(fileName + ".omwfont", fontId);
        else
            Log(Debug::Error) << "Font '" << fileName << "' is not found.";
    }

    void FontLoader::loadTrueTypeFont(const std::string& fileName, const std::string& fontId)
    {
        Log(Debug::Info) << "Loading font file " << fileName;

        osgMyGUI::DataManager* dataManager
            = dynamic_cast<osgMyGUI::DataManager*>(&osgMyGUI::DataManager::getInstance());
        if (!dataManager)
        {
            Log(Debug::Error) << "Can not load TrueType font " << fontId << ": osgMyGUI::DataManager is not available.";
            return;
        }

        // TODO: it may be worth to take in account resolution change, but it is not safe to replace used assets
        std::unique_ptr<MyGUI::IDataStream> layersStream(dataManager->getData("openmw_layers.xml"));
        MyGUI::IntSize bookSize = getBookSize(layersStream.get());
        float bookScale = osgMyGUI::ScalingLayer::getScaleFactor(bookSize);

        const auto oldDataPath = dataManager->getDataPath("");
        dataManager->setResourcePath("fonts");
        std::unique_ptr<MyGUI::IDataStream> dataStream(dataManager->getData(fileName));

        MyGUI::xml::Document xmlDocument;
        xmlDocument.open(dataStream.get());
        MyGUI::xml::ElementPtr root = xmlDocument.getRoot();

        MyGUI::xml::ElementEnumerator resourceNode = root->getElementEnumerator();
        bool valid = false;
        if (resourceNode.next("Resource"))
        {
            std::string type = resourceNode->findAttribute("type");
            valid = (type == "ResourceTrueTypeFont");
        }

        if (valid == false)
        {
            dataManager->setResourcePath(oldDataPath);
            Log(Debug::Error) << "Can not load TrueType font " << fontId << ": " << fileName << " is invalid.";
            return;
        }

        int resolution = 70;
        MyGUI::xml::ElementPtr resolutionNode = getProperty(resourceNode.current(), "Resolution");
        if (resolutionNode == nullptr)
        {
            resolutionNode = resourceNode->createChild("Property");
            resolutionNode->addAttribute("key", "Resolution");
        }
        else
            resolution = MyGUI::utility::parseInt(resolutionNode->findAttribute("value"));

        resolutionNode->setAttribute("value", MyGUI::utility::toString(resolution * std::ceil(mScalingFactor)));

        MyGUI::xml::ElementPtr sizeNode = resourceNode->createChild("Property");
        sizeNode->addAttribute("key", "Size");
        sizeNode->addAttribute("value", std::to_string(mFontHeight));

        MyGUI::ResourceTrueTypeFont* font = static_cast<MyGUI::ResourceTrueTypeFont*>(
            MyGUI::FactoryManager::getInstance().createObject("Resource", "ResourceTrueTypeFont"));
        font->deserialization(resourceNode.current(), MyGUI::Version(3, 2, 0));
        font->setResourceName(fontId);
        MyGUI::ResourceManager::getInstance().addResource(font);

        resolutionNode->setAttribute(
            "value", MyGUI::utility::toString(static_cast<int>(resolution * bookScale * mScalingFactor)));

        MyGUI::ResourceTrueTypeFont* bookFont = static_cast<MyGUI::ResourceTrueTypeFont*>(
            MyGUI::FactoryManager::getInstance().createObject("Resource", "ResourceTrueTypeFont"));
        bookFont->deserialization(resourceNode.current(), MyGUI::Version(3, 2, 0));
        bookFont->setResourceName("Journalbook " + fontId);
        MyGUI::ResourceManager::getInstance().addResource(bookFont);

        dataManager->setResourcePath(oldDataPath);

        if (resourceNode.next("Resource"))
            Log(Debug::Warning) << "Font file " << fileName
                                << " contains multiple Resource entries, only first one will be used.";
    }

    typedef struct
    {
        float x;
        float y;
    } Point;

    typedef struct
    {
        float u1; // appears unused, always 0
        Point top_left;
        Point top_right;
        Point bottom_left;
        Point bottom_right;
        float width;
        float height;
        float u2; // appears unused, always 0
        float kerning;
        float ascent;
    } GlyphInfo;

    void FontLoader::loadBitmapFont(const std::string& fileName, const std::string& fontId)
    {
        Log(Debug::Info) << "Loading font file " << fileName;

        Files::IStreamPtr file = mVFS->get("fonts/" + fileName);

        float fontSize;
        file->read((char*)&fontSize, sizeof(fontSize));
        if (!file->good())
            fail(*file, fileName, "File too small to be a valid font");

        int one;
        file->read((char*)&one, sizeof(one));
        if (!file->good())
            fail(*file, fileName, "File too small to be a valid font");

        if (one != 1)
            fail(*file, fileName, "Unexpected value");

        file->read((char*)&one, sizeof(one));
        if (!file->good())
            fail(*file, fileName, "File too small to be a valid font");

        if (one != 1)
            fail(*file, fileName, "Unexpected value");

        char name_[284];
        file->read(name_, sizeof(name_));
        if (!file->good())
            fail(*file, fileName, "File too small to be a valid font");
        std::string name(name_);

        GlyphInfo data[256];
        file->read((char*)data, sizeof(data));
        if (!file->good())
            fail(*file, fileName, "File too small to be a valid font");

        file.reset();

        // Create the font texture
        std::string bitmapFilename = "fonts/" + std::string(name) + ".tex";

        Files::IStreamPtr bitmapFile = mVFS->get(bitmapFilename);

        int width, height;
        bitmapFile->read((char*)&width, sizeof(int));
        bitmapFile->read((char*)&height, sizeof(int));

        if (!bitmapFile->good())
            fail(*bitmapFile, bitmapFilename, "File too small to be a valid bitmap");

        if (width <= 0 || height <= 0)
            fail(*bitmapFile, bitmapFilename, "Width and height must be positive");

        std::vector<char> textureData;
        textureData.resize(width * height * 4);
        bitmapFile->read(textureData.data(), width * height * 4);
        if (!bitmapFile->good())
            fail(*bitmapFile, bitmapFilename, "File too small to be a valid bitmap");
        bitmapFile.reset();

        MyGUI::ITexture* tex = MyGUI::RenderManager::getInstance().createTexture(bitmapFilename);
        tex->createManual(width, height, MyGUI::TextureUsage::Write, MyGUI::PixelFormat::R8G8B8A8);
        unsigned char* texData = reinterpret_cast<unsigned char*>(tex->lock(MyGUI::TextureUsage::Write));
        memcpy(texData, textureData.data(), textureData.size());
        tex->unlock();

        // We need to emulate loading from XML because the data members are private as of mygui 3.2.0
        MyGUI::xml::Document xmlDocument;
        MyGUI::xml::ElementPtr root = xmlDocument.createRoot("ResourceManualFont");

        root->addAttribute("name", fontId);

        MyGUI::xml::ElementPtr defaultHeight = root->createChild("Property");
        defaultHeight->addAttribute("key", "DefaultHeight");
        defaultHeight->addAttribute("value", fontSize);
        MyGUI::xml::ElementPtr source = root->createChild("Property");
        source->addAttribute("key", "Source");
        source->addAttribute("value", std::string(bitmapFilename));
        MyGUI::xml::ElementPtr codes = root->createChild("Codes");

        for (int i = 0; i < 256; i++)
        {
            float x1 = data[i].top_left.x * width;
            float y1 = data[i].top_left.y * height;
            float w = data[i].top_right.x * width - x1;
            float h = data[i].bottom_left.y * height - y1;

            ToUTF8::Utf8Encoder encoder(mEncoding);
            unsigned long unicodeVal = getUnicode(i, encoder, mEncoding);

            MyGUI::xml::ElementPtr code = codes->createChild("Code");
            code->addAttribute("index", unicodeVal);
            code->addAttribute("coord",
                MyGUI::utility::toString(x1) + " " + MyGUI::utility::toString(y1) + " " + MyGUI::utility::toString(w)
                    + " " + MyGUI::utility::toString(h));
            code->addAttribute("advance", data[i].width);
            code->addAttribute("bearing",
                MyGUI::utility::toString(data[i].kerning) + " "
                    + MyGUI::utility::toString((fontSize - data[i].ascent)));
            code->addAttribute(
                "size", MyGUI::IntSize(static_cast<int>(data[i].width), static_cast<int>(data[i].height)));

            // Fall back from unavailable Windows-1252 encoding symbols to similar characters available in the game
            // fonts
            std::multimap<int, int> additional; // fallback glyph index, unicode
            additional.insert(std::make_pair(156, 0x00A2)); // cent sign
            additional.insert(std::make_pair(89, 0x00A5)); // yen sign
            additional.insert(std::make_pair(221, 0x00A6)); // broken bar
            additional.insert(std::make_pair(99, 0x00A9)); // copyright sign
            additional.insert(std::make_pair(97, 0x00AA)); // prima ordinal indicator
            additional.insert(std::make_pair(60, 0x00AB)); // double left-pointing angle quotation mark
            additional.insert(std::make_pair(45, 0x00AD)); // soft hyphen
            additional.insert(std::make_pair(114, 0x00AE)); // registered trademark symbol
            additional.insert(std::make_pair(45, 0x00AF)); // macron
            additional.insert(std::make_pair(241, 0x00B1)); // plus-minus sign
            additional.insert(std::make_pair(50, 0x00B2)); // superscript two
            additional.insert(std::make_pair(51, 0x00B3)); // superscript three
            additional.insert(std::make_pair(44, 0x00B8)); // cedilla
            additional.insert(std::make_pair(49, 0x00B9)); // superscript one
            additional.insert(std::make_pair(111, 0x00BA)); // primo ordinal indicator
            additional.insert(std::make_pair(62, 0x00BB)); // double right-pointing angle quotation mark
            additional.insert(std::make_pair(63, 0x00BF)); // inverted question mark
            additional.insert(std::make_pair(65, 0x00C6)); // latin capital ae ligature
            additional.insert(std::make_pair(79, 0x00D8)); // latin capital o with stroke
            additional.insert(std::make_pair(97, 0x00E6)); // latin small ae ligature
            additional.insert(std::make_pair(111, 0x00F8)); // latin small o with stroke
            additional.insert(std::make_pair(79, 0x0152)); // latin capital oe ligature
            additional.insert(std::make_pair(111, 0x0153)); // latin small oe ligature
            additional.insert(std::make_pair(83, 0x015A)); // latin capital s with caron
            additional.insert(std::make_pair(115, 0x015B)); // latin small s with caron
            additional.insert(std::make_pair(89, 0x0178)); // latin capital y with diaresis
            additional.insert(std::make_pair(90, 0x017D)); // latin capital z with caron
            additional.insert(std::make_pair(122, 0x017E)); // latin small z with caron
            additional.insert(std::make_pair(102, 0x0192)); // latin small f with hook
            additional.insert(std::make_pair(94, 0x02C6)); // circumflex modifier
            additional.insert(std::make_pair(126, 0x02DC)); // small tilde
            additional.insert(std::make_pair(69, 0x0401)); // cyrillic capital io (no diaeresis latin e is available)
            additional.insert(std::make_pair(137, 0x0451)); // cyrillic small io
            additional.insert(std::make_pair(45, 0x2012)); // figure dash
            additional.insert(std::make_pair(45, 0x2013)); // en dash
            additional.insert(std::make_pair(45, 0x2014)); // em dash
            additional.insert(std::make_pair(39, 0x2018)); // left single quotation mark
            additional.insert(std::make_pair(39, 0x2019)); // right single quotation mark
            additional.insert(std::make_pair(44, 0x201A)); // single low quotation mark
            additional.insert(std::make_pair(39, 0x201B)); // single high quotation mark (reversed)
            additional.insert(std::make_pair(34, 0x201C)); // left double quotation mark
            additional.insert(std::make_pair(34, 0x201D)); // right double quotation mark
            additional.insert(std::make_pair(44, 0x201E)); // double low quotation mark
            additional.insert(std::make_pair(34, 0x201F)); // double high quotation mark (reversed)
            additional.insert(std::make_pair(43, 0x2020)); // dagger
            additional.insert(std::make_pair(216, 0x2021)); // double dagger (note: this glyph is not available)
            additional.insert(std::make_pair(46, 0x2026)); // ellipsis
            additional.insert(std::make_pair(37, 0x2030)); // per mille sign
            additional.insert(std::make_pair(60, 0x2039)); // single left-pointing angle quotation mark
            additional.insert(std::make_pair(62, 0x203A)); // single right-pointing angle quotation mark
            additional.insert(std::make_pair(101, 0x20AC)); // euro sign
            additional.insert(std::make_pair(84, 0x2122)); // trademark sign
            additional.insert(std::make_pair(45, 0x2212)); // minus sign

            for (std::multimap<int, int>::iterator it = additional.begin(); it != additional.end(); ++it)
            {
                if (it->first != i)
                    continue;
                code = codes->createChild("Code");
                code->addAttribute("index", it->second);
                code->addAttribute("coord",
                    MyGUI::utility::toString(x1) + " " + MyGUI::utility::toString(y1) + " "
                        + MyGUI::utility::toString(w) + " " + MyGUI::utility::toString(h));
                code->addAttribute("advance", data[i].width);
                code->addAttribute("bearing",
                    MyGUI::utility::toString(data[i].kerning) + " "
                        + MyGUI::utility::toString((fontSize - data[i].ascent)));
                code->addAttribute(
                    "size", MyGUI::IntSize(static_cast<int>(data[i].width), static_cast<int>(data[i].height)));
            }

            // ASCII vertical bar, use this as text input cursor
            if (i == 124)
            {
                MyGUI::xml::ElementPtr cursorCode = codes->createChild("Code");
                cursorCode->addAttribute("index", MyGUI::FontCodeType::Cursor);
                cursorCode->addAttribute("coord",
                    MyGUI::utility::toString(x1) + " " + MyGUI::utility::toString(y1) + " "
                        + MyGUI::utility::toString(w) + " " + MyGUI::utility::toString(h));
                cursorCode->addAttribute("advance", data[i].width);
                cursorCode->addAttribute("bearing",
                    MyGUI::utility::toString(data[i].kerning) + " "
                        + MyGUI::utility::toString((fontSize - data[i].ascent)));
                cursorCode->addAttribute(
                    "size", MyGUI::IntSize(static_cast<int>(data[i].width), static_cast<int>(data[i].height)));
            }

            // Question mark, use for NotDefined marker (used for glyphs not existing in the font)
            if (i == 63)
            {
                MyGUI::xml::ElementPtr cursorCode = codes->createChild("Code");
                cursorCode->addAttribute("index", MyGUI::FontCodeType::NotDefined);
                cursorCode->addAttribute("coord",
                    MyGUI::utility::toString(x1) + " " + MyGUI::utility::toString(y1) + " "
                        + MyGUI::utility::toString(w) + " " + MyGUI::utility::toString(h));
                cursorCode->addAttribute("advance", data[i].width);
                cursorCode->addAttribute("bearing",
                    MyGUI::utility::toString(data[i].kerning) + " "
                        + MyGUI::utility::toString((fontSize - data[i].ascent)));
                cursorCode->addAttribute(
                    "size", MyGUI::IntSize(static_cast<int>(data[i].width), static_cast<int>(data[i].height)));
            }
        }

        // These are required as well, but the fonts don't provide them
        for (int i = 0; i < 2; ++i)
        {
            MyGUI::FontCodeType::Enum type;
            if (i == 0)
                type = MyGUI::FontCodeType::Selected;
            else // if (i == 1)
                type = MyGUI::FontCodeType::SelectedBack;

            MyGUI::xml::ElementPtr cursorCode = codes->createChild("Code");
            cursorCode->addAttribute("index", type);
            cursorCode->addAttribute("coord", "0 0 0 0");
            cursorCode->addAttribute("advance", "0");
            cursorCode->addAttribute("bearing", "0 0");
            cursorCode->addAttribute("size", "0 0");
        }

        // Register the font with MyGUI
        MyGUI::ResourceManualFont* font = static_cast<MyGUI::ResourceManualFont*>(
            MyGUI::FactoryManager::getInstance().createObject("Resource", "ResourceManualFont"));
        font->deserialization(root, MyGUI::Version(3, 2, 0));

        MyGUI::ResourceManualFont* bookFont = static_cast<MyGUI::ResourceManualFont*>(
            MyGUI::FactoryManager::getInstance().createObject("Resource", "ResourceManualFont"));
        bookFont->deserialization(root, MyGUI::Version(3, 2, 0));
        bookFont->setResourceName("Journalbook " + fontId);

        MyGUI::ResourceManager::getInstance().addResource(font);
        MyGUI::ResourceManager::getInstance().addResource(bookFont);
    }

    void FontLoader::overrideLineHeight(MyGUI::xml::ElementPtr _node, const std::string& _file, MyGUI::Version _version)
    {
        MyGUI::xml::ElementEnumerator resourceNode = _node->getElementEnumerator();
        while (resourceNode.next("Resource"))
        {
            std::string type = resourceNode->findAttribute("type");

            if (Misc::StringUtils::ciEqual(type, "ResourceSkin")
                || Misc::StringUtils::ciEqual(type, "AutoSizedResourceSkin"))
            {
                // We should adjust line height for MyGUI widgets depending on font size
                MyGUI::xml::ElementPtr heightNode = resourceNode->createChild("Property");
                heightNode->addAttribute("key", "HeightLine");
                heightNode->addAttribute("value", std::to_string(mFontHeight + 2));
            }
        }

        MyGUI::ResourceManager::getInstance().loadFromXmlNode(_node, _file, _version);
    }

    int FontLoader::getFontHeight()
    {
        return mFontHeight;
    }

    std::string FontLoader::getFontForFace(const std::string& face)
    {
        const std::string lowerFace = Misc::StringUtils::lowerCase(face);
        if (lowerFace == "daedric")
            return "ScrollFont";

        return "DefaultFont";
    }
}