caching_image_reader_provider.hpp

// SPDX-License-Identifier: LGPL-2.1-or-later
 
#pragma once
 
#include <vitrio/export.hpp>
#include <vitrio/image_reader_provider.hpp>
#include <vitrio/platform.hpp>
 
#include <cstddef>
#include <memory>
#include <string>
 
namespace vitrio
{
 
class VITRIO_API caching_image_reader_provider final
    : public image_reader_provider
{
public:
    caching_image_reader_provider(
        std::shared_ptr<image_reader_provider> backing,
        std::size_t capacity
    );
 
    ~caching_image_reader_provider() override;
 
    std::size_t get_capacity() const noexcept;
 
    std::size_t get_reader_count() const noexcept;
 
    std::shared_ptr<const image_reader>
    acquire(const std::string &key) override;
 
private:
    class implementation;
    VITRIO_STD_MEMBER_INTERFACE
    std::unique_ptr<implementation> m_implementation;
};
 
} // namespace vitrio