src/newgrf_config.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_config.h Functions to find and configure NewGRFs. */
   9
  10 #ifndef NEWGRF_CONFIG_H
  11 #define NEWGRF_CONFIG_H
  12
  13 #include "strings_type.h"
  14 #include "core/alloc_type.hpp"
  15 #include "core/smallmap_type.hpp"
  16 #include "misc/countedptr.hpp"
  17 #include "fileio_type.h"
  18 #include "textfile_type.h"
  19 #include "newgrf_text.h"
  20
  21 /** GRF config bit flags */
  22 enum GCF_Flags {
  23         GCF_SYSTEM,     ///< GRF file is an openttd-internal system grf
  24         GCF_UNSAFE,     ///< GRF file is unsafe for static usage
  25         GCF_STATIC,     ///< GRF file is used statically (can be used in any MP game)
  26         GCF_COMPATIBLE, ///< GRF file does not exactly match the requested GRF (different MD5SUM), but grfid matches)
  27         GCF_COPY,       ///< The data is copied from a grf in _all_grfs
  28         GCF_INIT_ONLY,  ///< GRF file is processed up to GLS_INIT
  29         GCF_RESERVED,   ///< GRF file passed GLS_RESERVE stage
  30         GCF_INVALID,    ///< GRF is unusable with this version of OpenTTD
  31 };
  32
  33 /** Status of GRF */
  34 enum GRFStatus {
  35         GCS_UNKNOWN,      ///< The status of this grf file is unknown
  36         GCS_DISABLED,     ///< GRF file is disabled
  37         GCS_NOT_FOUND,    ///< GRF file was not found in the local cache
  38         GCS_INITIALISED,  ///< GRF file has been initialised
  39         GCS_ACTIVATED,    ///< GRF file has been activated
  40 };
  41
  42 /** Encountered GRF bugs */
  43 enum GRFBugs {
  44         GBUG_VEH_LENGTH,        ///< Length of rail vehicle changes when not inside a depot
  45         GBUG_VEH_REFIT,         ///< Articulated vehicles carry different cargoes resp. are differently refittable than specified in purchase list
  46         GBUG_VEH_POWERED_WAGON, ///< Powered wagon changed poweredness state when not inside a depot
  47         GBUG_UNKNOWN_CB_RESULT, ///< A callback returned an unknown/invalid result
  48         GBUG_VEH_CAPACITY,      ///< Capacity of vehicle changes when not refitting or arranging
  49 };
  50
  51 /** Status of post-gameload GRF compatibility check */
  52 enum GRFListCompatibility {
  53         GLC_ALL_GOOD,   ///< All GRF needed by game are present
  54         GLC_COMPATIBLE, ///< Compatible (eg. the same ID, but different checksum) GRF found in at least one case
  55         GLC_NOT_FOUND,  ///< At least one GRF couldn't be found (higher priority than GLC_COMPATIBLE)
  56 };
  57
  58 /** Information that can/has to be stored about a GRF's palette. */
  59 enum GRFPalette {
  60         GRFP_USE_BIT     = 0,   ///< The bit used for storing the palette to use.
  61         GRFP_GRF_OFFSET  = 2,   ///< The offset of the GRFP_GRF data.
  62         GRFP_GRF_SIZE    = 2,   ///< The size of the GRFP_GRF data.
  63         GRFP_BLT_OFFSET  = 4,   ///< The offset of the GRFP_BLT data.
  64         GRFP_BLT_SIZE    = 1,   ///< The size of the GRFP_BLT data.
  65
  66         GRFP_USE_DOS     = 0x0, ///< The palette state is set to use the DOS palette.
  67         GRFP_USE_WINDOWS = 0x1, ///< The palette state is set to use the Windows palette.
  68         GRFP_USE_MASK    = 0x1, ///< Bitmask to get only the use palette use states.
  69
  70         GRFP_GRF_UNSET   = 0x0 << GRFP_GRF_OFFSET,          ///< The NewGRF provided no information.
  71         GRFP_GRF_DOS     = 0x1 << GRFP_GRF_OFFSET,          ///< The NewGRF says the DOS palette can be used.
  72         GRFP_GRF_WINDOWS = 0x2 << GRFP_GRF_OFFSET,          ///< The NewGRF says the Windows palette can be used.
  73         GRFP_GRF_ANY     = GRFP_GRF_DOS | GRFP_GRF_WINDOWS, ///< The NewGRF says any palette can be used.
  74         GRFP_GRF_MASK    = GRFP_GRF_ANY,                    ///< Bitmask to get only the NewGRF supplied information.
  75
  76         GRFP_BLT_UNSET   = 0x0 << GRFP_BLT_OFFSET,          ///< The NewGRF provided no information or doesn't care about a 32 bpp blitter.
  77         GRFP_BLT_32BPP   = 0x1 << GRFP_BLT_OFFSET,          ///< The NewGRF prefers a 32 bpp blitter.
  78         GRFP_BLT_MASK    = GRFP_BLT_32BPP,                  ///< Bitmask to only get the blitter information.
  79 };
  80
  81
  82 /** Basic data to distinguish a GRF. Used in the server list window */
  83 struct GRFIdentifier {
  84         uint32 grfid;     ///< GRF ID (defined by Action 0x08)
  85         uint8 md5sum[16]; ///< MD5 checksum of file to distinguish files with the same GRF ID (eg. newer version of GRF)
  86
  87         GRFIdentifier() = default;
  88         GRFIdentifier(const GRFIdentifier &other) = default;
  89         GRFIdentifier(GRFIdentifier &&other) = default;
  90         GRFIdentifier(uint32 grfid, const uint8 *md5sum) : grfid(grfid)
  91         {
  92                 MemCpyT(this->md5sum, md5sum, lengthof(this->md5sum));
  93         }
  94
  95         GRFIdentifier& operator =(const GRFIdentifier &other) = default;
  96
  97         /**
  98          * Does the identification match the provided values?
  99          * @param grfid  Expected grfid.
 100          * @param md5sum Expected md5sum, may be \c nullptr (in which case, do not check it).
 101          * @return the object has the provided grfid and md5sum.
 102          */
 103         inline bool HasGrfIdentifier(uint32 grfid, const uint8 *md5sum) const
 104         {
 105                 if (this->grfid != grfid) return false;
 106                 if (md5sum == nullptr) return true;
 107                 return memcmp(md5sum, this->md5sum, sizeof(this->md5sum)) == 0;
 108         }
 109 };
 110
 111 /** Information about why GRF had problems during initialisation */
 112 struct GRFError {
 113         GRFError(StringID severity, StringID message = 0);
 114         GRFError(const GRFError &error);
 115
 116         /* Remove the copy assignment, as the default implementation will not do the right thing. */
 117         GRFError &operator=(GRFError &rhs) = delete;
 118
 119         std::string custom_message; ///< Custom message (if present)
 120         std::string data;           ///< Additional data for message and custom_message
 121         StringID message;           ///< Default message
 122         StringID severity;          ///< Info / Warning / Error / Fatal
 123         uint32 param_value[2];      ///< Values of GRF parameters to show for message and custom_message
 124 };
 125
 126 /** The possible types of a newgrf parameter. */
 127 enum GRFParameterType {
 128         PTYPE_UINT_ENUM, ///< The parameter allows a range of numbers, each of which can have a special name
 129         PTYPE_BOOL,      ///< The parameter is either 0 or 1
 130         PTYPE_END,       ///< Invalid parameter type
 131 };
 132
 133 /** Information about one grf parameter. */
 134 struct GRFParameterInfo {
 135         GRFParameterInfo(uint nr);
 136         GRFParameterInfo(GRFParameterInfo &info);
 137         GRFTextList name;      ///< The name of this parameter
 138         GRFTextList desc;      ///< The description of this parameter
 139         GRFParameterType type; ///< The type of this parameter
 140         uint32 min_value;      ///< The minimal value this parameter can have
 141         uint32 max_value;      ///< The maximal value of this parameter
 142         uint32 def_value;      ///< Default value of this parameter
 143         byte param_nr;         ///< GRF parameter to store content in
 144         byte first_bit;        ///< First bit to use in the GRF parameter
 145         byte num_bit;          ///< Number of bits to use for this parameter
 146         SmallMap<uint32, GRFTextList> value_names; ///< Names for each value.
 147         bool complete_labels;  ///< True if all values have a label.
 148
 149         uint32 GetValue(struct GRFConfig *config) const;
 150         void SetValue(struct GRFConfig *config, uint32 value);
 151         void Finalize();
 152 };
 153
 154 /** Information about GRF, used in the game and (part of it) in savegames */
 155 struct GRFConfig : ZeroedMemoryAllocator {
 156         GRFConfig(const char *filename = nullptr);
 157         GRFConfig(const GRFConfig &config);
 158         ~GRFConfig();
 159
 160         /* Remove the copy assignment, as the default implementation will not do the right thing. */
 161         GRFConfig &operator=(GRFConfig &rhs) = delete;
 162
 163         GRFIdentifier ident;                        ///< grfid and md5sum to uniquely identify newgrfs
 164         uint8 original_md5sum[16];                  ///< MD5 checksum of original file if only a 'compatible' file was loaded
 165         char *filename;                             ///< Filename - either with or without full path
 166         GRFTextWrapper name;                        ///< NOSAVE: GRF name (Action 0x08)
 167         GRFTextWrapper info;                        ///< NOSAVE: GRF info (author, copyright, ...) (Action 0x08)
 168         GRFTextWrapper url;                         ///< NOSAVE: URL belonging to this GRF.
 169         GRFError *error;                            ///< NOSAVE: Error/Warning during GRF loading (Action 0x0B)
 170
 171         uint32 version;                             ///< NOSAVE: Version a NewGRF can set so only the newest NewGRF is shown
 172         uint32 min_loadable_version;                ///< NOSAVE: Minimum compatible version a NewGRF can define
 173         uint8 flags;                                ///< NOSAVE: GCF_Flags, bitset
 174         GRFStatus status;                           ///< NOSAVE: GRFStatus, enum
 175         uint32 grf_bugs;                            ///< NOSAVE: bugs in this GRF in this run, @see enum GRFBugs
 176         uint32 param[0x80];                         ///< GRF parameters
 177         uint8 num_params;                           ///< Number of used parameters
 178         uint8 num_valid_params;                     ///< NOSAVE: Number of valid parameters (action 0x14)
 179         uint8 palette;                              ///< GRFPalette, bitset
 180         std::vector<GRFParameterInfo *> param_info; ///< NOSAVE: extra information about the parameters
 181         bool has_param_defaults;                    ///< NOSAVE: did this newgrf specify any defaults for it's parameters
 182
 183         struct GRFConfig *next;                     ///< NOSAVE: Next item in the linked list
 184
 185         void CopyParams(const GRFConfig &src);
 186
 187         const char *GetTextfile(TextfileType type) const;
 188         const char *GetName() const;
 189         const char *GetDescription() const;
 190         const char *GetURL() const;
 191
 192         void SetParameterDefaults();
 193         void SetSuitablePalette();
 194         void FinalizeParameterInfo();
 195 };
 196
 197 /** Method to find GRFs using FindGRFConfig */
 198 enum FindGRFConfigMode {
 199         FGCM_EXACT,       ///< Only find Grfs matching md5sum
 200         FGCM_COMPATIBLE,  ///< Find best compatible Grf wrt. desired_version
 201         FGCM_NEWEST,      ///< Find newest Grf
 202         FGCM_NEWEST_VALID,///< Find newest Grf, ignoring Grfs with GCF_INVALID set
 203         FGCM_ANY,         ///< Use first found
 204 };
 205
 206 extern GRFConfig *_all_grfs;          ///< First item in list of all scanned NewGRFs
 207 extern GRFConfig *_grfconfig;         ///< First item in list of current GRF set up
 208 extern GRFConfig *_grfconfig_newgame; ///< First item in list of default GRF set up
 209 extern GRFConfig *_grfconfig_static;  ///< First item in list of static GRF set up
 210 extern uint _missing_extra_graphics;  ///< Number of sprites provided by the fallback extra GRF, i.e. missing in the baseset.
 211
 212 /** Callback for NewGRF scanning. */
 213 struct NewGRFScanCallback {
 214         /** Make sure the right destructor gets called. */
 215         virtual ~NewGRFScanCallback() {}
 216         /** Called whenever the NewGRF scan completed. */
 217         virtual void OnNewGRFsScanned() = 0;
 218 };
 219
 220 size_t GRFGetSizeOfDataSection(FILE *f);
 221
 222 void ScanNewGRFFiles(NewGRFScanCallback *callback);
 223 const GRFConfig *FindGRFConfig(uint32 grfid, FindGRFConfigMode mode, const uint8 *md5sum = nullptr, uint32 desired_version = 0);
 224 GRFConfig *GetGRFConfig(uint32 grfid, uint32 mask = 0xFFFFFFFF);
 225 GRFConfig **CopyGRFConfigList(GRFConfig **dst, const GRFConfig *src, bool init_only);
 226 void AppendStaticGRFConfigs(GRFConfig **dst);
 227 void AppendToGRFConfigList(GRFConfig **dst, GRFConfig *el);
 228 void ClearGRFConfigList(GRFConfig **config);
 229 void ResetGRFConfig(bool defaults);
 230 GRFListCompatibility IsGoodGRFConfigList(GRFConfig *grfconfig);
 231 bool FillGRFDetails(GRFConfig *config, bool is_static, Subdirectory subdir = NEWGRF_DIR);
 232 char *GRFBuildParamList(char *dst, const GRFConfig *c, const char *last);
 233
 234 /* In newgrf_gui.cpp */
 235 void ShowNewGRFSettings(bool editable, bool show_params, bool exec_changes, GRFConfig **config);
 236
 237 void UpdateNewGRFScanStatus(uint num, const char *name);
 238 void UpdateNewGRFConfigPalette(int32 new_value = 0);
 239
 240 #endif /* NEWGRF_CONFIG_H */