//
//  KRTextureKTX2.h
//  Kraken Engine
//
//  Copyright 2026 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 KRTextureKTX2 : public KRTexture2D
{
public:
  KRTextureKTX2(KRContext& context, mimir::Block* data, std::string name);
  virtual ~KRTextureKTX2();
  virtual std::string getExtension() override;

  bool getLodData(void* buffer, int lod) override;

  virtual long getMemRequiredForLod(int lod) override;
  virtual hydra::Vector3i getDimensions() const override;
  virtual int getFaceCount() const override;
  virtual VkFormat getFormat() const override;

protected:

  typedef struct
  {
    __uint8_t identifier[12];
    __uint32_t vkFormat;
    __uint32_t typeSize;
    __uint32_t pixelWidth;
    __uint32_t pixelHeight;
    __uint32_t pixelDepth;
    __uint32_t layerCount;
    __uint32_t faceCount;
    __uint32_t levelCount;
    __uint32_t supercompressionScheme;
    // Index 
    __uint32_t dfdByteOffset;
    __uint32_t dfdByteLength;
    __uint32_t kvdByteOffset;
    __uint32_t kvdByteLength;
    __uint32_t sgdByteOffset;
    __uint32_t sgdByteLength;
  } KTX2Header;

  typedef struct
  {
    __uint64_t byteOffset;
    __uint64_t byteLength;
    __uint64_t uncompressedByteLength;
  } KTX2LevelIndex;

  KTX2Header m_header;
};
