/*

 * HEIF codec.

 * Copyright (c) 2023 Dirk Farin <dirk.farin@gmail.com>

 *

 * This file is part of libheif.

 *

 * libheif is free software: you can redistribute it and/or modify

 * it under the terms of the GNU Lesser General Public License as

 * published by the Free Software Foundation, either version 3 of

 * the License, or (at your option) any later version.

 *

 * libheif is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with libheif.  If not, see <http://www.gnu.org/licenses/>.

 */

#ifndef LIBHEIF_UNC_IMAGE_H

#define LIBHEIF_UNC_IMAGE_H

#include "image/pixelimage.h"

#include "file.h"

#include "context.h"

#include "libheif/heif_uncompressed.h"

#include <cstdint>

#include <string>

#include <vector>

#include <memory>

#include <set>

#include "codecs/uncompressed/unc_encoder.h"

class unc_encoder;

class HeifContext;

class ImageItem_uncompressed : public ImageItem

{

public:

  ImageItem_uncompressed(HeifContext* ctx, heif_item_id id);

  ImageItem_uncompressed(HeifContext* ctx);

  uint32_t get_infe_type() const override { return fourcc("unci"); }

  heif_compression_format get_compression_format() const override { return heif_compression_uncompressed; }

  // Instead of storing alpha in a separate unci, this is put into the main image item

  const char* get_auxC_alpha_channel_type() const override { return nullptr; }

  bool has_coded_alpha_channel() const override;

  // const heif_color_profile_nclx* get_forced_output_nclx() const override { return nullptr; }

  bool is_ispe_essential() const override { return true; }

  void get_tile_size(uint32_t& w, uint32_t& h) const override;

  // Walk the cmpd / uncC / cpat property boxes and populate

  // ImageDescription::m_components with one ComponentDescription per uncC

  // component plus one (has_data_plane=false) per extra cpat reference

  // component. Called once from ImageItem::set_properties().

  void populate_component_descriptions() override;

  // Code from encode_uncompressed_image() has been moved to here.

  Result<std::shared_ptr<HeifPixelImage>> decode_compressed_image(const heif_decoding_options& options,

                                                                  bool decode_tile_only, uint32_t tile_x0, uint32_t tile_y0,

                                                                  DecodeTraversalState decode_state) const override;

  heif_image_tiling get_heif_image_tiling() const override;

  Error initialize_decoder() override;

  void set_decoder_input_data() override;

  heif_brand2 get_compatible_brand() const override;

public:

  // --- encoding

  Result<Encoder::CodedImageData> encode(const std::shared_ptr<HeifPixelImage>& image,

                                         heif_encoder* encoder,

                                         const heif_encoding_options& options,

                                         heif_image_input_class input_class) override;

  static Result<std::shared_ptr<ImageItem_uncompressed> > add_unci_item(HeifContext* ctx,

                                                                        const heif_unci_image_parameters* parameters,

                                                                        const heif_encoding_options* encoding_options,

                                                                        const std::shared_ptr<const HeifPixelImage>& prototype);

  Error add_image_tile(uint32_t tile_x, uint32_t tile_y, const std::shared_ptr<const HeifPixelImage>& image, bool save_alpha);

protected:

  Result<std::shared_ptr<Decoder>> get_decoder() const override;

  std::shared_ptr<Encoder> get_encoder() const override;

private:

  // The tiling that is exposed through the API. This is the uncC tiling, unless its

  // tiles cannot be decoded independently because of the generic compression. In that

  // case, the image is exposed as a single tile and false is returned.

  bool get_exposed_tiling(uint32_t& num_columns, uint32_t& num_rows) const;

  std::shared_ptr<class Decoder_uncompressed> m_decoder;

  std::shared_ptr<class Encoder_uncompressed> m_encoder;

  std::unique_ptr<const unc_encoder> m_unc_encoder;

  heif_encoding_options m_tile_encoding_options;

  /*

  Result<ImageItem::CodedImageData> generate_headers(const std::shared_ptr<const HeifPixelImage>& src_image,

                                                     const heif_unci_image_parameters* parameters,

                                                     const struct heif_encoding_options* options);

                                                     */

  uint64_t m_next_tile_write_pos = 0;

};

#endif //LIBHEIF_UNC_IMAGE_H