src/newgrf.h

   1 /*
   2  * This file is part of OpenTTD.
   3  * 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.
   4  * 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.
   5  * 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/>.
   6  */
   7
   8 /** @file newgrf.h Base for the NewGRF implementation. */
   9
  10 #ifndef NEWGRF_H
  11 #define NEWGRF_H
  12
  13 #include "cargotype.h"
  14 #include "rail_type.h"
  15 #include "road_type.h"
  16 #include "fileio_type.h"
  17 #include "core/bitmath_func.hpp"
  18 #include "core/alloc_type.hpp"
  19 #include "core/smallvec_type.hpp"
  20
  21 /**
  22  * List of different canal 'features'.
  23  * Each feature gets an entry in the canal spritegroup table
  24  */
  25 enum CanalFeature {
  26         CF_WATERSLOPE,
  27         CF_LOCKS,
  28         CF_DIKES,
  29         CF_ICON,
  30         CF_DOCKS,
  31         CF_RIVER_SLOPE,
  32         CF_RIVER_EDGE,
  33         CF_RIVER_GUI,
  34         CF_BUOY,
  35         CF_END,
  36 };
  37
  38 /** Canal properties local to the NewGRF */
  39 struct CanalProperties {
  40         uint8 callback_mask;  ///< Bitmask of canal callbacks that have to be called.
  41         uint8 flags;          ///< Flags controlling display.
  42 };
  43
  44 enum GrfLoadingStage {
  45         GLS_FILESCAN,
  46         GLS_SAFETYSCAN,
  47         GLS_LABELSCAN,
  48         GLS_INIT,
  49         GLS_RESERVE,
  50         GLS_ACTIVATION,
  51         GLS_END,
  52 };
  53
  54 DECLARE_POSTFIX_INCREMENT(GrfLoadingStage)
  55
  56 enum GrfMiscBit {
  57         GMB_DESERT_TREES_FIELDS    = 0, // Unsupported.
  58         GMB_DESERT_PAVED_ROADS     = 1,
  59         GMB_FIELD_BOUNDING_BOX     = 2, // Unsupported.
  60         GMB_TRAIN_WIDTH_32_PIXELS  = 3, ///< Use 32 pixels per train vehicle in depot gui and vehicle details. Never set in the global variable; @see GRFFile::traininfo_vehicle_width
  61         GMB_AMBIENT_SOUND_CALLBACK = 4,
  62         GMB_CATENARY_ON_3RD_TRACK  = 5, // Unsupported.
  63         GMB_SECOND_ROCKY_TILE_SET  = 6,
  64 };
  65
  66 enum GrfSpecFeature {
  67         GSF_TRAINS,
  68         GSF_ROADVEHICLES,
  69         GSF_SHIPS,
  70         GSF_AIRCRAFT,
  71         GSF_STATIONS,
  72         GSF_CANALS,
  73         GSF_BRIDGES,
  74         GSF_HOUSES,
  75         GSF_GLOBALVAR,
  76         GSF_INDUSTRYTILES,
  77         GSF_INDUSTRIES,
  78         GSF_CARGOES,
  79         GSF_SOUNDFX,
  80         GSF_AIRPORTS,
  81         GSF_SIGNALS,
  82         GSF_OBJECTS,
  83         GSF_RAILTYPES,
  84         GSF_AIRPORTTILES,
  85         GSF_ROADTYPES,
  86         GSF_TRAMTYPES,
  87         GSF_END,
  88
  89         GSF_FAKE_TOWNS = GSF_END, ///< Fake town GrfSpecFeature for NewGRF debugging (parent scope)
  90         GSF_FAKE_END,             ///< End of the fake features
  91
  92         GSF_INVALID = 0xFF,       ///< An invalid spec feature
  93 };
  94
  95 static const uint32 INVALID_GRFID = 0xFFFFFFFF;
  96
  97 struct GRFLabel {
  98         byte label;
  99         uint32 nfo_line;
 100         size_t pos;
 101         struct GRFLabel *next;
 102 };
 103
 104 /** Dynamic data of a loaded NewGRF */
 105 struct GRFFile : ZeroedMemoryAllocator {
 106         char *filename;
 107         uint32 grfid;
 108         byte grf_version;
 109
 110         uint sound_offset;
 111         uint16 num_sounds;
 112
 113         struct StationSpec **stations;
 114         struct HouseSpec **housespec;
 115         struct IndustrySpec **industryspec;
 116         struct IndustryTileSpec **indtspec;
 117         struct ObjectSpec **objectspec;
 118         struct AirportSpec **airportspec;
 119         struct AirportTileSpec **airtspec;
 120
 121         uint32 param[0x80];
 122         uint param_end;  ///< one more than the highest set parameter
 123
 124         GRFLabel *label; ///< Pointer to the first label. This is a linked list, not an array.
 125
 126         std::vector<CargoLabel> cargo_list;             ///< Cargo translation table (local ID -> label)
 127         uint8 cargo_map[NUM_CARGO];                     ///< Inverse cargo translation table (CargoID -> local ID)
 128
 129         std::vector<RailTypeLabel> railtype_list;       ///< Railtype translation table
 130         RailType railtype_map[RAILTYPE_END];
 131
 132         std::vector<RoadTypeLabel> roadtype_list;       ///< Roadtype translation table (road)
 133         RoadType roadtype_map[ROADTYPE_END];
 134
 135         std::vector<RoadTypeLabel> tramtype_list;       ///< Roadtype translation table (tram)
 136         RoadType tramtype_map[ROADTYPE_END];
 137
 138         CanalProperties canal_local_properties[CF_END]; ///< Canal properties as set by this NewGRF
 139
 140         struct LanguageMap *language_map; ///< Mappings related to the languages.
 141
 142         int traininfo_vehicle_pitch;  ///< Vertical offset for drawing train images in depot GUI and vehicle details
 143         uint traininfo_vehicle_width; ///< Width (in pixels) of a 8/8 train vehicle in depot GUI and vehicle details
 144
 145         uint32 grf_features;                     ///< Bitset of GrfSpecFeature the grf uses
 146         PriceMultipliers price_base_multipliers; ///< Price base multipliers as set by the grf.
 147
 148         GRFFile(const struct GRFConfig *config);
 149         ~GRFFile();
 150
 151         /** Get GRF Parameter with range checking */
 152         uint32 GetParam(uint number) const
 153         {
 154                 /* Note: We implicitly test for number < lengthof(this->param) and return 0 for invalid parameters.
 155                  *       In fact this is the more important test, as param is zeroed anyway. */
 156                 assert(this->param_end <= lengthof(this->param));
 157                 return (number < this->param_end) ? this->param[number] : 0;
 158         }
 159 };
 160
 161 enum ShoreReplacement {
 162         SHORE_REPLACE_NONE,       ///< No shore sprites were replaced.
 163         SHORE_REPLACE_ACTION_5,   ///< Shore sprites were replaced by Action5.
 164         SHORE_REPLACE_ACTION_A,   ///< Shore sprites were replaced by ActionA (using grass tiles for the corner-shores).
 165         SHORE_REPLACE_ONLY_NEW,   ///< Only corner-shores were loaded by Action5 (openttd(w/d).grf only).
 166 };
 167
 168 enum TramReplacement {
 169         TRAMWAY_REPLACE_DEPOT_NONE,       ///< No tram depot graphics were loaded.
 170         TRAMWAY_REPLACE_DEPOT_WITH_TRACK, ///< Electrified depot graphics with tram track were loaded.
 171         TRAMWAY_REPLACE_DEPOT_NO_TRACK,   ///< Electrified depot graphics without tram track were loaded.
 172 };
 173
 174 struct GRFLoadedFeatures {
 175         bool has_2CC;             ///< Set if any vehicle is loaded which uses 2cc (two company colours).
 176         uint64 used_liveries;     ///< Bitmask of #LiveryScheme used by the defined engines.
 177         ShoreReplacement shore;   ///< In which way shore sprites were replaced.
 178         TramReplacement tram;     ///< In which way tram depots were replaced.
 179 };
 180
 181 /**
 182  * Check for grf miscellaneous bits
 183  * @param bit The bit to check.
 184  * @return Whether the bit is set.
 185  */
 186 static inline bool HasGrfMiscBit(GrfMiscBit bit)
 187 {
 188         extern byte _misc_grf_features;
 189         return HasBit(_misc_grf_features, bit);
 190 }
 191
 192 /* Indicates which are the newgrf features currently loaded ingame */
 193 extern GRFLoadedFeatures _loaded_newgrf_features;
 194
 195 void LoadNewGRFFile(struct GRFConfig *config, GrfLoadingStage stage, Subdirectory subdir, bool temporary);
 196 void LoadNewGRF(uint load_index, uint num_baseset);
 197 void ReloadNewGRFData(); // in saveload/afterload.cpp
 198 void ResetNewGRFData();
 199 void ResetPersistentNewGRFData();
 200
 201 void CDECL grfmsg(int severity, const char *str, ...) WARN_FORMAT(2, 3);
 202
 203 bool GetGlobalVariable(byte param, uint32 *value, const GRFFile *grffile);
 204
 205 StringID MapGRFStringID(uint32 grfid, StringID str);
 206 void ShowNewGRFError();
 207
 208 #endif /* NEWGRF_H */