//
//  KRTextureKTX.h
//  Kraken Engine
//
//  Copyright 2022 Kearwood Gilbert. All rights reserved.
//  
//  Redistribution and use in source and binary forms, with or without modification, are
//  permitted provided that the following conditions are met:
//  
//  1. Redistributions of source code must retain the above copyright notice, this list of
//  conditions and the following disclaimer.
//  
//  2. Redistributions in binary form must reproduce the above copyright notice, this list
//  of conditions and the following disclaimer in the documentation and/or other materials
//  provided with the distribution.
//  
//  THIS SOFTWARE IS PROVIDED BY KEARWOOD GILBERT ''AS IS'' AND ANY EXPRESS OR IMPLIED
//  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
//  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KEARWOOD GILBERT OR
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//

#pragma once

#include "KRTexture2D.h"

class KRTextureKTX : public KRTexture2D
{
public:
  KRTextureKTX(KRContext& context, KRDataBlock* data, std::string name);
  KRTextureKTX(KRContext& context, std::string name, unsigned int internal_format, unsigned int base_internal_format, int width, int height, const std::list<KRDataBlock*>& blocks);
  virtual ~KRTextureKTX();
  virtual std::string getExtension();

  bool uploadTexture(KRDevice& device, VkImage& image, int lod_max_dim, int& current_lod_max_dim, bool premultiply_alpha = false) override;

  virtual long getMemRequiredForSize(int max_dim);
  virtual Vector2i getDimensions() const override;

protected:

  std::list<KRDataBlock*> m_blocks;

  typedef struct _KTXHeader
  {
    __uint8_t identifier[12];
    __uint32_t endianness;
    __uint32_t glType;
    __uint32_t glTypeSize;
    __uint32_t glFormat;
    __uint32_t glInternalFormat;
    __uint32_t glBaseInternalFormat;
    __uint32_t pixelWidth;
    __uint32_t pixelHeight;
    __uint32_t pixelDepth;
    __uint32_t numberOfArrayElements;
    __uint32_t numberOfFaces;
    __uint32_t numberOfMipmapLevels;
    __uint32_t bytesOfKeyValueData;
  } KTXHeader;

  KTXHeader m_header;
};