preview.hpp

// SPDX-License-Identifier: GPL-2.0-or-later
 
#ifndef PREVIEW_HPP_
#define PREVIEW_HPP_
 
// *****************************************************************************
#include "exiv2lib_export.h"
 
#include "image.hpp"
 
// *****************************************************************************
// namespace extensions
namespace Exiv2 {
// *****************************************************************************
// class definitions
 
using PreviewId = int;
 
struct EXIV2API PreviewProperties {
  std::string mimeType_;   
  std::string extension_;  
  size_t size_{};          
  size_t width_{};         
  size_t height_{};        
  PreviewId id_{};         
};
 
using PreviewPropertiesList = std::vector<PreviewProperties>;
 
class EXIV2API PreviewImage {
  friend class PreviewManager;
 
 public:
 
 
  PreviewImage(const PreviewImage& rhs);
 
  ~PreviewImage() = default;
 
 
 
  PreviewImage& operator=(const PreviewImage& rhs);
 
 
 
  [[nodiscard]] DataBuf copy() const;
  [[nodiscard]] const byte* pData() const;
  [[nodiscard]] uint32_t size() const;
#ifdef EXV_ENABLE_FILESYSTEM
  [[nodiscard]] size_t writeFile(const std::string& path) const;
#endif
  [[nodiscard]] std::string mimeType() const;
  [[nodiscard]] std::string extension() const;
  [[nodiscard]] size_t width() const;
  [[nodiscard]] size_t height() const;
  [[nodiscard]] PreviewId id() const;
 
 private:
  PreviewImage(PreviewProperties properties, DataBuf&& data);
 
  PreviewProperties properties_;  
  DataBuf preview_;               
 
};  // class PreviewImage
 
class EXIV2API PreviewManager {
 public:
 
 
  explicit PreviewManager(const Image& image);
 
 
 
  [[nodiscard]] PreviewPropertiesList getPreviewProperties() const;
  [[nodiscard]] PreviewImage getPreviewImage(const PreviewProperties& properties) const;
 
 private:
  const Image& image_;
 
};  // class PreviewManager
}  // namespace Exiv2
 
#endif  // #ifndef PREVIEW_HPP_