BppFontPool.hpp

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/*
 * This file is part of the DUDS project. It is subject to the BSD-style
 * license terms in the LICENSE file found in the top-level directory of this
 * distribution and at https://github.com/jjackowski/duds/blob/master/LICENSE.
 * No part of DUDS, including this file, may be copied, modified, propagated,
 * or distributed except according to the terms contained in the LICENSE file.
 *
 * Copyright (C) 2023  Jeff Jackowski
 */
#ifndef BPPFONTPOOL_HPP
#define BPPFONTPOOL_HPP
#include <duds/ui/graphics/BppStringCache.hpp>
#include <duds/ui/graphics/BppImageErrors.hpp>

namespace duds { namespace ui { namespace graphics {

class BppFontPool : boost::noncopyable {
    struct FontAndCache {
        BppFontSptr fnt;
        BppStringCacheSptr sc;
    };
    std::unordered_map<std::string, FontAndCache>  fonts;
    mutable duds::general::Spinlock block;
    void getFc(FontAndCache &fc, const std::string &font) const;
public:
    void add(
        const std::string &name,
        const BppFontSptr &font,
        const BppStringCacheSptr &cache
    );
    void add(
        const std::string &name,
        BppFontSptr &&font,
        BppStringCacheSptr &&cache
    );
    void addWithoutCache(const std::string &name, const BppFontSptr &font);
    void addWithoutCache(const std::string &name, const std::string &fontpath);
    void addWithCache(const std::string &name, const BppFontSptr &font);
    void addWithCache(const std::string &name, const std::string &fontpath);
    void alias(const std::string &existing, const std::string &newname);
    BppFontSptr getFont(const std::string &font) const;
    BppStringCacheSptr getStringCache(const std::string &font) const;
    template <class String>
    BppImageSptr render(
        const std::string &font,
        const String &str,
        BppFont::Flags flags = BppFont::AlignLeft
    ) const {
        FontAndCache fc;
        getFc(fc, font);
        try {
            return fc.fnt->render(str, flags);
        } catch (boost::exception &be) {
            be << FontName(font);
            throw;
        }
    }
    template <class String>
    ConstBppImageSptr text(
        const std::string &font,
        const String &str,
        BppFont::Flags flags = BppFont::AlignLeft
    ) const {
        FontAndCache fc;
        getFc(fc, font);
        try {
            if (fc.sc) {
                return fc.sc->text(str, flags);
            }
            return fc.fnt->render(str, flags);
        } catch (boost::exception &be) {
            be << FontName(font);
            throw;
        }
    }
};

} } }

#endif        //  #ifndef BPPFONTPOOL_HPP