SFML + PHYSFS

#include <physfs.h>

class FileStream : public sf::InputStream
{
    public:
        FileStream() : m_file(NULL){}

        virtual ~FileStream()
        {
            PHYSFS_close(m_file);
        }

        bool open(const char* filename)
        {
            if(m_file)
            {
                PHYSFS_close(m_file);
            }
            m_file = PHYSFS_openRead(filename);
            return m_file != NULL;
        }

        virtual sf::Int64 read(void* data, sf::Int64 size)
        {
            if(m_file)
            {
                return PHYSFS_read(m_file, data, 1, static_cast<PHYSFS_uint32>(size));
            }
            return -1;
        }

        virtual sf::Int64 seek(sf::Int64 position)
        {
            if(m_file)
            {
                PHYSFS_seek(m_file, position);
                return tell();
            }
            return -1;
        }

        virtual sf::Int64 tell()
        {
            if (m_file)
            {
                return PHYSFS_tell(m_file);
            }
            return -1;
        }

        virtual sf::Int64 getSize()
        {
            if(m_file)
            {
                return PHYSFS_fileLength(m_file);
            }
            return -1;
        }

    private:
        PHYSFS_File* m_file;
};

// ----------------------------------------------------------------------------------------------
// Example :
// ----------------------------------------------------------------------------------------------
PHYSFS_init(argv[0]);
PHYSFS_addToSearchPath("images.zip",1);
sf::Texture my_texture;
FileStream my_stream;

if(!my_stream.open("images/img.png"))
{
    // Erreur
}
if(!my_texture.loadFromStream(my_stream))
{
    // Erreur
}
sf::Sprite my_sprite;
my_sprite.setTexture(my_texture);

// Un peu plus bas... à la fin du programme

PHYSFS_deinit();