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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* imagecache.h
*
* Thu Jun 2 17:12:05 CEST 2016
* Copyright 2016 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* DrumGizmo is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#pragma once
#include <string>
#include <map>
#include <utility>
namespace dggui
{
class Image;
class ImageCache;
class ScopedImageBorrower
{
public:
ScopedImageBorrower(ImageCache& imageCache, const std::string& filename);
ScopedImageBorrower(ScopedImageBorrower&& other);
virtual ~ScopedImageBorrower();
ScopedImageBorrower& operator=(ScopedImageBorrower&& other);
Image& operator*();
Image& operator()();
protected:
ImageCache& imageCache;
std::string filename;
Image& image;
};
class ImageCache
{
public:
ScopedImageBorrower getImage(const std::string& filename);
private:
friend class ScopedImageBorrower;
Image& borrow(const std::string& filename);
void giveBack(const std::string& filename);
protected:
std::map<std::string, std::pair<std::size_t, Image>> imageCache;
};
} // dggui::
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