TextureCacheJob.h

/*
 *  Copyright (C) 2012-2018 Team Kodi
 *  This file is part of Kodi - https://kodi.tv
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 *  See LICENSES/README.md for more information.
 */

#pragma once

#include "pictures/PictureScalingAlgorithm.h"
#include "utils/Job.h"

#include <cstddef>
#include <memory>
#include <stdint.h>
#include <string>
#include <vector>

class CTexture;

class CTextureDetails
{
public:
  CTextureDetails()
  {
    id = -1;
    width = height = 0;
    updateable = false;
  };
  bool operator==(const CTextureDetails &right) const
  {
    return (id    == right.id    &&
            file  == right.file  &&
            width == right.width );
  };
  int          id;
  std::string  file;
  std::string  hash;
  unsigned int width;
  unsigned int height;
  bool         updateable;
};

class CTextureCacheJob : public CJob
{
public:
  CTextureCacheJob(const std::string &url, const std::string &oldHash = "");
  ~CTextureCacheJob() override;

  const char* GetType() const override { return kJobTypeCacheImage; }
  bool operator==(const CJob *job) const override;
  bool DoWork() override;

  bool CacheTexture(std::unique_ptr<CTexture>* texture = nullptr);

  static bool ResizeTexture(const std::string &url, uint8_t* &result, size_t &result_size);

  std::string m_url;
  std::string m_oldHash;
  CTextureDetails m_details;
private:
  static std::string GetImageHash(const std::string &url);

  bool UpdateableURL(const std::string &url) const;

  static std::string DecodeImageURL(const std::string &url, unsigned int &width, unsigned int &height, CPictureScalingAlgorithm::Algorithm& scalingAlgorithm, std::string &additional_info);

  static std::unique_ptr<CTexture> LoadImage(const std::string& image,
                                             unsigned int width,
                                             unsigned int height,
                                             const std::string& additional_info,
                                             bool requirePixels = false);

  std::string    m_cachePath;
};

/* \brief Job class for storing the use count of textures
 */
class CTextureUseCountJob : public CJob
{
public:
  explicit CTextureUseCountJob(const std::vector<CTextureDetails> &textures);

  const char* GetType() const override { return "usecount"; }
  bool operator==(const CJob *job) const override;
  bool DoWork() override;

private:
  std::vector<CTextureDetails> m_textures;
};