/**
* Orthanc - A Lightweight, RESTful DICOM Store
 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
 * Department, University Hospital of Liege, Belgium
 * Copyright (C) 2017-2023 Osimis S.A., Belgium
 * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium
 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
 *
 * This program is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program 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
 * Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 **/


#pragma once

#include "DecodedTiledPyramid.h"

#include <Compatibility.h>

#include <vector>

namespace OrthancWSI
{
 class OnTheFlyPyramid : public DecodedTiledPyramid
 {
 private:
   std::unique_ptr<Orthanc::ImageAccessor>  baseLevel_;
   std::vector<Orthanc::ImageAccessor*>     higherLevels_;
   unsigned int                             tileWidth_;
   unsigned int                             tileHeight_;

 protected:
   void ReadRegion(Orthanc::ImageAccessor &target,
                   bool &isEmpty,
                   unsigned level,
                   unsigned x,
                   unsigned y) ORTHANC_OVERRIDE;

 public:
   OnTheFlyPyramid(Orthanc::ImageAccessor* baseLevel /* takes ownership */,
                   unsigned int tileWidth,
                   unsigned int tileHeight,
                   bool smooth);

   virtual ~OnTheFlyPyramid();

   const Orthanc::ImageAccessor& GetLevel(unsigned int level) const;

   unsigned GetLevelCount() const ORTHANC_OVERRIDE
   {
     return higherLevels_.size() + 1 /* base level */;
   }

   unsigned GetLevelWidth(unsigned int level) const ORTHANC_OVERRIDE
   {
     return GetLevel(level).GetWidth();
   }

   unsigned GetLevelHeight(unsigned int level) const ORTHANC_OVERRIDE
   {
     return GetLevel(level).GetHeight();
   }

   unsigned GetTileWidth(unsigned int level) const ORTHANC_OVERRIDE
   {
     return tileWidth_;
   }

   unsigned GetTileHeight(unsigned level) const ORTHANC_OVERRIDE
   {
     return tileHeight_;
   }

   Orthanc::PixelFormat GetPixelFormat() const ORTHANC_OVERRIDE
   {
     return baseLevel_->GetFormat();
   }

   Orthanc::PhotometricInterpretation GetPhotometricInterpretation() const ORTHANC_OVERRIDE
   {
     return Orthanc::PhotometricInterpretation_RGB;
   }
 };
}