/********************************************************************** <BR>
  This file is part of Crack dot Com's free source code release of
  Golgotha. <a href="http://www.crack.com/golgotha_release"> <BR> for
  information about compiling & licensing issues visit this URL</a> 
  <PRE> If that doesn't help, contact Jonathan Clark at 
  golgotha_source@usa.net (Subject should have "GOLG" in it) 
***********************************************************************/

#ifndef TEX_CACHE_HH
#define TEX_CACHE_HH


#include "palette/pal.hh"

class i4_file_class;

//very similar to mipheader.
//color,base_*,flags,num_mip_levels
//should match corresponding mipheader_t's

//the format of the cache file is like this:
//the header
//the entries
//the entry lumps (a directory, basically)
//a sw32 that should == the size of the file
//(the last sw32 is to protect against corrupt cache files)

inline w32 tex_cache_entry_disk_size()
{
  return (4*4) + (2*2) + 2;
}

class tex_cache_entry_t
{
public:
  w32  id;
  w32  lowmipoffset;
  w32  average_color;
  w32  last_modified;
  
  sw16 base_width;
  sw16 base_height;
  
  w8   flags;
  sw8  num_mip_levels;

  void write(i4_file_class *f);
  void read(i4_file_class *f);
};

inline sw32 tex_cache_header_disk_size()
{
  i4_pixel_format blah;
  return (blah.write(0) * 3 + 4*2);
}

class tex_cache_header_t
{
  enum {SQUARE_TEXTURES=1};

public:
  i4_pixel_format regular_format;
  i4_pixel_format chroma_format;
  i4_pixel_format alpha_format;
  w32             max_mip_dimention;  
  w32             num_entries;
  w8              flags;

  //not written
  tex_cache_entry_t *entries;
  void read(i4_file_class *f);
  void write(i4_file_class *f);
};

#endif