src/saveload/animated_tile_sl.cpp

   1 /* $Id$ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
   6  * OpenTTD 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.
   7  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   8  */
   9
  10 /** @file animated_tile_sl.cpp Code handling saving and loading of animated tiles */
  11
  12 #include "../stdafx.h"
  13 #include "../tile_type.h"
  14 #include "../core/alloc_func.hpp"
  15
  16 #include "saveload.h"
  17
  18 #include "../safeguards.h"
  19
  20 extern TileIndex *_animated_tile_list;
  21 extern uint _animated_tile_count;
  22 extern uint _animated_tile_allocated;
  23
  24 /**
  25  * Save the ANIT chunk.
  26  */
  27 static void Save_ANIT()
  28 {
  29         SlSetLength(_animated_tile_count * sizeof(*_animated_tile_list));
  30         SlArray(_animated_tile_list, _animated_tile_count, SLE_UINT32);
  31 }
  32
  33 /**
  34  * Load the ANIT chunk; the chunk containing the animated tiles.
  35  */
  36 static void Load_ANIT()
  37 {
  38         /* Before version 80 we did NOT have a variable length animated tile table */
  39         if (IsSavegameVersionBefore(80)) {
  40                 /* In pre version 6, we has 16bit per tile, now we have 32bit per tile, convert it ;) */
  41                 SlArray(_animated_tile_list, 256, IsSavegameVersionBefore(6) ? (SLE_FILE_U16 | SLE_VAR_U32) : SLE_UINT32);
  42
  43                 for (_animated_tile_count = 0; _animated_tile_count < 256; _animated_tile_count++) {
  44                         if (_animated_tile_list[_animated_tile_count] == 0) break;
  45                 }
  46                 return;
  47         }
  48
  49         _animated_tile_count = (uint)SlGetFieldLength() / sizeof(*_animated_tile_list);
  50
  51         /* Determine a nice rounded size for the amount of allocated tiles */
  52         _animated_tile_allocated = 256;
  53         while (_animated_tile_allocated < _animated_tile_count) _animated_tile_allocated *= 2;
  54
  55         _animated_tile_list = ReallocT<TileIndex>(_animated_tile_list, _animated_tile_allocated);
  56         SlArray(_animated_tile_list, _animated_tile_count, SLE_UINT32);
  57 }
  58
  59 /**
  60  * "Definition" imported by the saveload code to be able to load and save
  61  * the animated tile table.
  62  */
  63 extern const ChunkHandler _animated_tile_chunk_handlers[] = {
  64         { 'ANIT', Save_ANIT, Load_ANIT, NULL, NULL, CH_RIFF | CH_LAST},
  65 };