compression.hpp

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#ifndef EAGINE_COMPRESSION_HPP
#define EAGINE_COMPRESSION_HPP
 
#include "callable_ref.hpp"
#include "memory/block.hpp"
#include "memory/buffer.hpp"
#include <memory>
 
namespace eagine {
//------------------------------------------------------------------------------
enum class data_compression_level {
    none,
    lowest,
    normal,
    highest
};
//------------------------------------------------------------------------------
class data_compressor_impl;
 
class data_compressor {
public:
    data_compressor();
 
    using data_handler = callable_ref<bool(memory::const_block)>;
 
    auto compress(
      memory::const_block input,
      const data_handler& handler,
      data_compression_level level) -> bool;
 
    auto compress(
      memory::const_block input,
      memory::buffer& output,
      data_compression_level level) -> memory::const_block;
 
    auto compress(memory::const_block input, memory::buffer& output)
      -> memory::const_block {
        return compress(input, output, data_compression_level::normal);
    }
 
    auto compress(memory::const_block input, data_compression_level level)
      -> memory::const_block;
 
    auto decompress(memory::const_block input, const data_handler& handler)
      -> bool;
 
    auto decompress(memory::const_block input, memory::buffer& output)
      -> memory::const_block;
 
    auto decompress(memory::const_block input) -> memory::const_block;
 
private:
    std::shared_ptr<data_compressor_impl> _pimpl{};
};
//------------------------------------------------------------------------------
} // namespace eagine
 
#if !EAGINE_LINK_LIBRARY || defined(EAGINE_IMPLEMENTING_LIBRARY)
#include <eagine/compression.inl>
#endif
 
#endif // EAGINE_COMPRESSION_HPP