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newgrf.cpp
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newgrf.cpp
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/*
* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/** @file newgrf.cpp Base of all NewGRF support. */
#include "stdafx.h"
#include <stdarg.h>
#include "debug.h"
#include "fileio_func.h"
#include "engine_func.h"
#include "engine_base.h"
#include "bridge.h"
#include "town.h"
#include "newgrf_engine.h"
#include "newgrf_text.h"
#include "fontcache.h"
#include "currency.h"
#include "landscape.h"
#include "newgrf_cargo.h"
#include "newgrf_house.h"
#include "newgrf_sound.h"
#include "newgrf_station.h"
#include "industrytype.h"
#include "industry_map.h"
#include "newgrf_canal.h"
#include "newgrf_townname.h"
#include "newgrf_industries.h"
#include "newgrf_airporttiles.h"
#include "newgrf_airport.h"
#include "newgrf_object.h"
#include "rev.h"
#include "fios.h"
#include "strings_func.h"
#include "date_func.h"
#include "string_func.h"
#include "network/core/config.h"
#include <map>
#include "smallmap_gui.h"
#include "genworld.h"
#include "error.h"
#include "vehicle_func.h"
#include "language.h"
#include "vehicle_base.h"
#include "road.h"
#include "newgrf_roadstop.h"
#include "table/strings.h"
#include "table/build_industry.h"
#include "safeguards.h"
/* TTDPatch extended GRF format codec
* (c) Petr Baudis 2004 (GPL'd)
* Changes by Florian octo Forster are (c) by the OpenTTD development team.
*
* Contains portions of documentation by TTDPatch team.
* Thanks especially to Josef Drexler for the documentation as well as a lot
* of help at #tycoon. Also thanks to Michael Blunck for his GRF files which
* served as subject to the initial testing of this codec. */
/** List of all loaded GRF files */
static std::vector<GRFFile *> _grf_files;
const std::vector<GRFFile *> &GetAllGRFFiles()
{
return _grf_files;
}
/** Miscellaneous GRF features, set by Action 0x0D, parameter 0x9E */
byte _misc_grf_features = 0;
/** 32 * 8 = 256 flags. Apparently TTDPatch uses this many.. */
static uint32 _ttdpatch_flags[8];
/** Indicates which are the newgrf features currently loaded ingame */
GRFLoadedFeatures _loaded_newgrf_features;
static const uint MAX_SPRITEGROUP = UINT8_MAX; ///< Maximum GRF-local ID for a spritegroup.
/** Temporary data during loading of GRFs */
struct GrfProcessingState {
private:
/** Definition of a single Action1 spriteset */
struct SpriteSet {
SpriteID sprite; ///< SpriteID of the first sprite of the set.
uint num_sprites; ///< Number of sprites in the set.
};
/** Currently referenceable spritesets */
std::map<uint, SpriteSet> spritesets[GSF_END];
public:
/* Global state */
GrfLoadingStage stage; ///< Current loading stage
SpriteID spriteid; ///< First available SpriteID for loading realsprites.
/* Local state in the file */
SpriteFile *file; ///< File of currently processed GRF file.
GRFFile *grffile; ///< Currently processed GRF file.
GRFConfig *grfconfig; ///< Config of the currently processed GRF file.
uint32 nfo_line; ///< Currently processed pseudo sprite number in the GRF.
/* Kind of return values when processing certain actions */
int skip_sprites; ///< Number of pseudo sprites to skip before processing the next one. (-1 to skip to end of file)
/* Currently referenceable spritegroups */
const SpriteGroup *spritegroups[MAX_SPRITEGROUP + 1];
/** Clear temporary data before processing the next file in the current loading stage */
void ClearDataForNextFile()
{
this->nfo_line = 0;
this->skip_sprites = 0;
for (uint i = 0; i < GSF_END; i++) {
this->spritesets[i].clear();
}
memset(this->spritegroups, 0, sizeof(this->spritegroups));
}
/**
* Records new spritesets.
* @param feature GrfSpecFeature the set is defined for.
* @param first_sprite SpriteID of the first sprite in the set.
* @param first_set First spriteset to define.
* @param numsets Number of sets to define.
* @param numents Number of sprites per set to define.
*/
void AddSpriteSets(byte feature, SpriteID first_sprite, uint first_set, uint numsets, uint numents)
{
assert(feature < GSF_END);
for (uint i = 0; i < numsets; i++) {
SpriteSet &set = this->spritesets[feature][first_set + i];
set.sprite = first_sprite + i * numents;
set.num_sprites = numents;
}
}
/**
* Check whether there are any valid spritesets for a feature.
* @param feature GrfSpecFeature to check.
* @return true if there are any valid sets.
* @note Spritesets with zero sprites are valid to allow callback-failures.
*/
bool HasValidSpriteSets(byte feature) const
{
assert(feature < GSF_END);
return !this->spritesets[feature].empty();
}
/**
* Check whether a specific set is defined.
* @param feature GrfSpecFeature to check.
* @param set Set to check.
* @return true if the set is valid.
* @note Spritesets with zero sprites are valid to allow callback-failures.
*/
bool IsValidSpriteSet(byte feature, uint set) const
{
assert(feature < GSF_END);
return this->spritesets[feature].find(set) != this->spritesets[feature].end();
}
/**
* Returns the first sprite of a spriteset.
* @param feature GrfSpecFeature to query.
* @param set Set to query.
* @return First sprite of the set.
*/
SpriteID GetSprite(byte feature, uint set) const
{
assert(IsValidSpriteSet(feature, set));
return this->spritesets[feature].find(set)->second.sprite;
}
/**
* Returns the number of sprites in a spriteset
* @param feature GrfSpecFeature to query.
* @param set Set to query.
* @return Number of sprites in the set.
*/
uint GetNumEnts(byte feature, uint set) const
{
assert(IsValidSpriteSet(feature, set));
return this->spritesets[feature].find(set)->second.num_sprites;
}
};
static GrfProcessingState _cur;
/**
* Helper to check whether an image index is valid for a particular NewGRF vehicle.
* @tparam T The type of vehicle.
* @param image_index The image index to check.
* @return True iff the image index is valid, or 0xFD (use new graphics).
*/
template <VehicleType T>
static inline bool IsValidNewGRFImageIndex(uint8 image_index)
{
return image_index == 0xFD || IsValidImageIndex<T>(image_index);
}
class OTTDByteReaderSignal { };
/** Class to read from a NewGRF file */
class ByteReader {
protected:
byte *data;
byte *end;
public:
ByteReader(byte *data, byte *end) : data(data), end(end) { }
inline byte *ReadBytes(size_t size)
{
if (data + size >= end) {
/* Put data at the end, as would happen if every byte had been individually read. */
data = end;
throw OTTDByteReaderSignal();
}
byte *ret = data;
data += size;
return ret;
}
inline byte ReadByte()
{
if (data < end) return *(data)++;
throw OTTDByteReaderSignal();
}
uint16 ReadWord()
{
uint16 val = ReadByte();
return val | (ReadByte() << 8);
}
uint16 ReadExtendedByte()
{
uint16 val = ReadByte();
return val == 0xFF ? ReadWord() : val;
}
uint32 ReadDWord()
{
uint32 val = ReadWord();
return val | (ReadWord() << 16);
}
uint32 ReadVarSize(byte size)
{
switch (size) {
case 1: return ReadByte();
case 2: return ReadWord();
case 4: return ReadDWord();
default:
NOT_REACHED();
return 0;
}
}
const char *ReadString()
{
char *string = reinterpret_cast<char *>(data);
size_t string_length = ttd_strnlen(string, Remaining());
if (string_length == Remaining()) {
/* String was not NUL terminated, so make sure it is now. */
string[string_length - 1] = '\0';
grfmsg(7, "String was not terminated with a zero byte.");
} else {
/* Increase the string length to include the NUL byte. */
string_length++;
}
Skip(string_length);
return string;
}
inline size_t Remaining() const
{
return end - data;
}
inline bool HasData(size_t count = 1) const
{
return data + count <= end;
}
inline byte *Data()
{
return data;
}
inline void Skip(size_t len)
{
data += len;
/* It is valid to move the buffer to exactly the end of the data,
* as there may not be any more data read. */
if (data > end) throw OTTDByteReaderSignal();
}
};
typedef void (*SpecialSpriteHandler)(ByteReader *buf);
static const uint NUM_STATIONS_PER_GRF = 255; ///< Number of StationSpecs per NewGRF; limited to 255 to allow extending Action3 with an extended byte later on.
/** Temporary engine data used when loading only */
struct GRFTempEngineData {
/** Summary state of refittability properties */
enum Refittability {
UNSET = 0, ///< No properties assigned. Default refit masks shall be activated.
EMPTY, ///< GRF defined vehicle as not-refittable. The vehicle shall only carry the default cargo.
NONEMPTY, ///< GRF defined the vehicle as refittable. If the refitmask is empty after translation (cargotypes not available), disable the vehicle.
};
uint16 cargo_allowed;
uint16 cargo_disallowed;
RailTypeLabel railtypelabel;
uint8 roadtramtype;
const GRFFile *defaultcargo_grf; ///< GRF defining the cargo translation table to use if the default cargo is the 'first refittable'.
Refittability refittability; ///< Did the newgrf set any refittability property? If not, default refittability will be applied.
uint8 rv_max_speed; ///< Temporary storage of RV prop 15, maximum speed in mph/0.8
CargoTypes ctt_include_mask; ///< Cargo types always included in the refit mask.
CargoTypes ctt_exclude_mask; ///< Cargo types always excluded from the refit mask.
/**
* Update the summary refittability on setting a refittability property.
* @param non_empty true if the GRF sets the vehicle to be refittable.
*/
void UpdateRefittability(bool non_empty)
{
if (non_empty) {
this->refittability = NONEMPTY;
} else if (this->refittability == UNSET) {
this->refittability = EMPTY;
}
}
};
static GRFTempEngineData *_gted; ///< Temporary engine data used during NewGRF loading
/**
* Contains the GRF ID of the owner of a vehicle if it has been reserved.
* GRM for vehicles is only used if dynamic engine allocation is disabled,
* so 256 is the number of original engines. */
static uint32 _grm_engines[256];
/** Contains the GRF ID of the owner of a cargo if it has been reserved */
static uint32 _grm_cargoes[NUM_CARGO * 2];
struct GRFLocation {
uint32 grfid;
uint32 nfoline;
GRFLocation(uint32 grfid, uint32 nfoline) : grfid(grfid), nfoline(nfoline) { }
bool operator<(const GRFLocation &other) const
{
return this->grfid < other.grfid || (this->grfid == other.grfid && this->nfoline < other.nfoline);
}
bool operator == (const GRFLocation &other) const
{
return this->grfid == other.grfid && this->nfoline == other.nfoline;
}
};
static std::map<GRFLocation, SpriteID> _grm_sprites;
typedef std::map<GRFLocation, byte*> GRFLineToSpriteOverride;
static GRFLineToSpriteOverride _grf_line_to_action6_sprite_override;
/**
* Debug() function dedicated to newGRF debugging messages
* Function is essentially the same as Debug(grf, severity, ...) with the
* addition of file:line information when parsing grf files.
* NOTE: for the above reason(s) grfmsg() should ONLY be used for
* loading/parsing grf files, not for runtime debug messages as there
* is no file information available during that time.
* @param severity debugging severity level, see debug.h
* @param str message in printf() format
*/
void CDECL grfmsg(int severity, const char *str, ...)
{
char buf[1024];
va_list va;
va_start(va, str);
vseprintf(buf, lastof(buf), str, va);
va_end(va);
Debug(grf, severity, "[{}:{}] {}", _cur.grfconfig->filename, _cur.nfo_line, buf);
}
/**
* Obtain a NewGRF file by its grfID
* @param grfid The grfID to obtain the file for
* @return The file.
*/
static GRFFile *GetFileByGRFID(uint32 grfid)
{
for (GRFFile * const file : _grf_files) {
if (file->grfid == grfid) return file;
}
return nullptr;
}
/**
* Obtain a NewGRF file by its filename
* @param filename The filename to obtain the file for.
* @return The file.
*/
static GRFFile *GetFileByFilename(const char *filename)
{
for (GRFFile * const file : _grf_files) {
if (strcmp(file->filename, filename) == 0) return file;
}
return nullptr;
}
/** Reset all NewGRFData that was used only while processing data */
static void ClearTemporaryNewGRFData(GRFFile *gf)
{
gf->labels.clear();
}
/**
* Disable a GRF
* @param message Error message or STR_NULL.
* @param config GRFConfig to disable, nullptr for current.
* @return Error message of the GRF for further customisation.
*/
static GRFError *DisableGrf(StringID message = STR_NULL, GRFConfig *config = nullptr)
{
GRFFile *file;
if (config != nullptr) {
file = GetFileByGRFID(config->ident.grfid);
} else {
config = _cur.grfconfig;
file = _cur.grffile;
}
config->status = GCS_DISABLED;
if (file != nullptr) ClearTemporaryNewGRFData(file);
if (config == _cur.grfconfig) _cur.skip_sprites = -1;
if (message != STR_NULL) {
delete config->error;
config->error = new GRFError(STR_NEWGRF_ERROR_MSG_FATAL, message);
if (config == _cur.grfconfig) config->error->param_value[0] = _cur.nfo_line;
}
return config->error;
}
/**
* Information for mapping static StringIDs.
*/
struct StringIDMapping {
uint32 grfid; ///< Source NewGRF.
StringID source; ///< Source StringID (GRF local).
StringID *target; ///< Destination for mapping result.
};
typedef std::vector<StringIDMapping> StringIDMappingVector;
static StringIDMappingVector _string_to_grf_mapping;
/**
* Record a static StringID for getting translated later.
* @param source Source StringID (GRF local).
* @param target Destination for the mapping result.
*/
static void AddStringForMapping(StringID source, StringID *target)
{
*target = STR_UNDEFINED;
_string_to_grf_mapping.push_back({_cur.grffile->grfid, source, target});
}
/**
* Perform a mapping from TTDPatch's string IDs to OpenTTD's
* string IDs, but only for the ones we are aware off; the rest
* like likely unused and will show a warning.
* @param str the string ID to convert
* @return the converted string ID
*/
static StringID TTDPStringIDToOTTDStringIDMapping(StringID str)
{
/* StringID table for TextIDs 0x4E->0x6D */
static const StringID units_volume[] = {
STR_ITEMS, STR_PASSENGERS, STR_TONS, STR_BAGS,
STR_LITERS, STR_ITEMS, STR_CRATES, STR_TONS,
STR_TONS, STR_TONS, STR_TONS, STR_BAGS,
STR_TONS, STR_TONS, STR_TONS, STR_BAGS,
STR_TONS, STR_TONS, STR_BAGS, STR_LITERS,
STR_TONS, STR_LITERS, STR_TONS, STR_ITEMS,
STR_BAGS, STR_LITERS, STR_TONS, STR_ITEMS,
STR_TONS, STR_ITEMS, STR_LITERS, STR_ITEMS
};
/* A string straight from a NewGRF; this was already translated by MapGRFStringID(). */
assert(!IsInsideMM(str, 0xD000, 0xD7FF));
#define TEXTID_TO_STRINGID(begin, end, stringid, stringend) \
static_assert(stringend - stringid == end - begin); \
if (str >= begin && str <= end) return str + (stringid - begin)
/* We have some changes in our cargo strings, resulting in some missing. */
TEXTID_TO_STRINGID(0x000E, 0x002D, STR_CARGO_PLURAL_NOTHING, STR_CARGO_PLURAL_FIZZY_DRINKS);
TEXTID_TO_STRINGID(0x002E, 0x004D, STR_CARGO_SINGULAR_NOTHING, STR_CARGO_SINGULAR_FIZZY_DRINK);
if (str >= 0x004E && str <= 0x006D) return units_volume[str - 0x004E];
TEXTID_TO_STRINGID(0x006E, 0x008D, STR_QUANTITY_NOTHING, STR_QUANTITY_FIZZY_DRINKS);
TEXTID_TO_STRINGID(0x008E, 0x00AD, STR_ABBREV_NOTHING, STR_ABBREV_FIZZY_DRINKS);
TEXTID_TO_STRINGID(0x00D1, 0x00E0, STR_COLOUR_DARK_BLUE, STR_COLOUR_WHITE);
/* Map building names according to our lang file changes. There are several
* ranges of house ids, all of which need to be remapped to allow newgrfs
* to use original house names. */
TEXTID_TO_STRINGID(0x200F, 0x201F, STR_TOWN_BUILDING_NAME_TALL_OFFICE_BLOCK_1, STR_TOWN_BUILDING_NAME_OLD_HOUSES_1);
TEXTID_TO_STRINGID(0x2036, 0x2041, STR_TOWN_BUILDING_NAME_COTTAGES_1, STR_TOWN_BUILDING_NAME_SHOPPING_MALL_1);
TEXTID_TO_STRINGID(0x2059, 0x205C, STR_TOWN_BUILDING_NAME_IGLOO_1, STR_TOWN_BUILDING_NAME_PIGGY_BANK_1);
/* Same thing for industries */
TEXTID_TO_STRINGID(0x4802, 0x4826, STR_INDUSTRY_NAME_COAL_MINE, STR_INDUSTRY_NAME_SUGAR_MINE);
TEXTID_TO_STRINGID(0x482D, 0x482E, STR_NEWS_INDUSTRY_CONSTRUCTION, STR_NEWS_INDUSTRY_PLANTED);
TEXTID_TO_STRINGID(0x4832, 0x4834, STR_NEWS_INDUSTRY_CLOSURE_GENERAL, STR_NEWS_INDUSTRY_CLOSURE_LACK_OF_TREES);
TEXTID_TO_STRINGID(0x4835, 0x4838, STR_NEWS_INDUSTRY_PRODUCTION_INCREASE_GENERAL, STR_NEWS_INDUSTRY_PRODUCTION_INCREASE_FARM);
TEXTID_TO_STRINGID(0x4839, 0x483A, STR_NEWS_INDUSTRY_PRODUCTION_DECREASE_GENERAL, STR_NEWS_INDUSTRY_PRODUCTION_DECREASE_FARM);
switch (str) {
case 0x4830: return STR_ERROR_CAN_T_CONSTRUCT_THIS_INDUSTRY;
case 0x4831: return STR_ERROR_FOREST_CAN_ONLY_BE_PLANTED;
case 0x483B: return STR_ERROR_CAN_ONLY_BE_POSITIONED;
}
#undef TEXTID_TO_STRINGID
if (str == STR_NULL) return STR_EMPTY;
Debug(grf, 0, "Unknown StringID 0x{:04X} remapped to STR_EMPTY. Please open a Feature Request if you need it", str);
return STR_EMPTY;
}
/**
* Used when setting an object's property to map to the GRF's strings
* while taking in consideration the "drift" between TTDPatch string system and OpenTTD's one
* @param grfid Id of the grf file.
* @param str StringID that we want to have the equivalent in OoenTTD.
* @return The properly adjusted StringID.
*/
StringID MapGRFStringID(uint32 grfid, StringID str)
{
if (IsInsideMM(str, 0xD800, 0x10000)) {
/* General text provided by NewGRF.
* In the specs this is called the 0xDCxx range (misc persistent texts),
* but we meanwhile extended the range to 0xD800-0xFFFF.
* Note: We are not involved in the "persistent" business, since we do not store
* any NewGRF strings in savegames. */
return GetGRFStringID(grfid, str);
} else if (IsInsideMM(str, 0xD000, 0xD800)) {
/* Callback text provided by NewGRF.
* In the specs this is called the 0xD0xx range (misc graphics texts).
* These texts can be returned by various callbacks.
*
* Due to how TTDP implements the GRF-local- to global-textid translation
* texts included via 0x80 or 0x81 control codes have to add 0x400 to the textid.
* We do not care about that difference and just mask out the 0x400 bit.
*/
str &= ~0x400;
return GetGRFStringID(grfid, str);
} else {
/* The NewGRF wants to include/reference an original TTD string.
* Try our best to find an equivalent one. */
return TTDPStringIDToOTTDStringIDMapping(str);
}
}
static std::map<uint32, uint32> _grf_id_overrides;
/**
* Set the override for a NewGRF
* @param source_grfid The grfID which wants to override another NewGRF.
* @param target_grfid The grfID which is being overridden.
*/
static void SetNewGRFOverride(uint32 source_grfid, uint32 target_grfid)
{
_grf_id_overrides[source_grfid] = target_grfid;
grfmsg(5, "SetNewGRFOverride: Added override of 0x%X to 0x%X", BSWAP32(source_grfid), BSWAP32(target_grfid));
}
/**
* Returns the engine associated to a certain internal_id, resp. allocates it.
* @param file NewGRF that wants to change the engine.
* @param type Vehicle type.
* @param internal_id Engine ID inside the NewGRF.
* @param static_access If the engine is not present, return nullptr instead of allocating a new engine. (Used for static Action 0x04).
* @return The requested engine.
*/
static Engine *GetNewEngine(const GRFFile *file, VehicleType type, uint16 internal_id, bool static_access = false)
{
/* Hack for add-on GRFs that need to modify another GRF's engines. This lets
* them use the same engine slots. */
uint32 scope_grfid = INVALID_GRFID; // If not using dynamic_engines, all newgrfs share their ID range
if (_settings_game.vehicle.dynamic_engines) {
/* If dynamic_engies is enabled, there can be multiple independent ID ranges. */
scope_grfid = file->grfid;
uint32 override = _grf_id_overrides[file->grfid];
if (override != 0) {
scope_grfid = override;
const GRFFile *grf_match = GetFileByGRFID(override);
if (grf_match == nullptr) {
grfmsg(5, "Tried mapping from GRFID %x to %x but target is not loaded", BSWAP32(file->grfid), BSWAP32(override));
} else {
grfmsg(5, "Mapping from GRFID %x to %x", BSWAP32(file->grfid), BSWAP32(override));
}
}
/* Check if the engine is registered in the override manager */
EngineID engine = _engine_mngr.GetID(type, internal_id, scope_grfid);
if (engine != INVALID_ENGINE) {
Engine *e = Engine::Get(engine);
if (e->grf_prop.grffile == nullptr) e->grf_prop.grffile = file;
return e;
}
}
/* Check if there is an unreserved slot */
EngineID engine = _engine_mngr.GetID(type, internal_id, INVALID_GRFID);
if (engine != INVALID_ENGINE) {
Engine *e = Engine::Get(engine);
if (e->grf_prop.grffile == nullptr) {
e->grf_prop.grffile = file;
grfmsg(5, "Replaced engine at index %d for GRFID %x, type %d, index %d", e->index, BSWAP32(file->grfid), type, internal_id);
}
/* Reserve the engine slot */
if (!static_access) {
EngineIDMapping *eid = _engine_mngr.data() + engine;
eid->grfid = scope_grfid; // Note: this is INVALID_GRFID if dynamic_engines is disabled, so no reservation
}
return e;
}
if (static_access) return nullptr;
if (!Engine::CanAllocateItem()) {
grfmsg(0, "Can't allocate any more engines");
return nullptr;
}
size_t engine_pool_size = Engine::GetPoolSize();
/* ... it's not, so create a new one based off an existing engine */
Engine *e = new Engine(type, internal_id);
e->grf_prop.grffile = file;
/* Reserve the engine slot */
assert(_engine_mngr.size() == e->index);
_engine_mngr.push_back({
scope_grfid, // Note: this is INVALID_GRFID if dynamic_engines is disabled, so no reservation
internal_id,
type,
std::min<uint8>(internal_id, _engine_counts[type]) // substitute_id == _engine_counts[subtype] means "no substitute"
});
if (engine_pool_size != Engine::GetPoolSize()) {
/* Resize temporary engine data ... */
_gted = ReallocT(_gted, Engine::GetPoolSize());
/* and blank the new block. */
size_t len = (Engine::GetPoolSize() - engine_pool_size) * sizeof(*_gted);
memset(_gted + engine_pool_size, 0, len);
}
if (type == VEH_TRAIN) {
_gted[e->index].railtypelabel = GetRailTypeInfo(e->u.rail.railtype)->label;
}
grfmsg(5, "Created new engine at index %d for GRFID %x, type %d, index %d", e->index, BSWAP32(file->grfid), type, internal_id);
return e;
}
/**
* Return the ID of a new engine
* @param file The NewGRF file providing the engine.
* @param type The Vehicle type.
* @param internal_id NewGRF-internal ID of the engine.
* @return The new EngineID.
* @note depending on the dynamic_engine setting and a possible override
* property the grfID may be unique or overwriting or partially re-defining
* properties of an existing engine.
*/
EngineID GetNewEngineID(const GRFFile *file, VehicleType type, uint16 internal_id)
{
uint32 scope_grfid = INVALID_GRFID; // If not using dynamic_engines, all newgrfs share their ID range
if (_settings_game.vehicle.dynamic_engines) {
scope_grfid = file->grfid;
uint32 override = _grf_id_overrides[file->grfid];
if (override != 0) scope_grfid = override;
}
return _engine_mngr.GetID(type, internal_id, scope_grfid);
}
/**
* Map the colour modifiers of TTDPatch to those that Open is using.
* @param grf_sprite Pointer to the structure been modified.
*/
static void MapSpriteMappingRecolour(PalSpriteID *grf_sprite)
{
if (HasBit(grf_sprite->pal, 14)) {
ClrBit(grf_sprite->pal, 14);
SetBit(grf_sprite->sprite, SPRITE_MODIFIER_OPAQUE);
}
if (HasBit(grf_sprite->sprite, 14)) {
ClrBit(grf_sprite->sprite, 14);
SetBit(grf_sprite->sprite, PALETTE_MODIFIER_TRANSPARENT);
}
if (HasBit(grf_sprite->sprite, 15)) {
ClrBit(grf_sprite->sprite, 15);
SetBit(grf_sprite->sprite, PALETTE_MODIFIER_COLOUR);
}
}
/**
* Read a sprite and a palette from the GRF and convert them into a format
* suitable to OpenTTD.
* @param buf Input stream.
* @param read_flags Whether to read TileLayoutFlags.
* @param invert_action1_flag Set to true, if palette bit 15 means 'not from action 1'.
* @param use_cur_spritesets Whether to use currently referenceable action 1 sets.
* @param feature GrfSpecFeature to use spritesets from.
* @param[out] grf_sprite Read sprite and palette.
* @param[out] max_sprite_offset Optionally returns the number of sprites in the spriteset of the sprite. (0 if no spritset)
* @param[out] max_palette_offset Optionally returns the number of sprites in the spriteset of the palette. (0 if no spritset)
* @return Read TileLayoutFlags.
*/
static TileLayoutFlags ReadSpriteLayoutSprite(ByteReader *buf, bool read_flags, bool invert_action1_flag, bool use_cur_spritesets, int feature, PalSpriteID *grf_sprite, uint16 *max_sprite_offset = nullptr, uint16 *max_palette_offset = nullptr)
{
grf_sprite->sprite = buf->ReadWord();
grf_sprite->pal = buf->ReadWord();
TileLayoutFlags flags = read_flags ? (TileLayoutFlags)buf->ReadWord() : TLF_NOTHING;
MapSpriteMappingRecolour(grf_sprite);
bool custom_sprite = HasBit(grf_sprite->pal, 15) != invert_action1_flag;
ClrBit(grf_sprite->pal, 15);
if (custom_sprite) {
/* Use sprite from Action 1 */
uint index = GB(grf_sprite->sprite, 0, 14);
if (use_cur_spritesets && (!_cur.IsValidSpriteSet(feature, index) || _cur.GetNumEnts(feature, index) == 0)) {
grfmsg(1, "ReadSpriteLayoutSprite: Spritelayout uses undefined custom spriteset %d", index);
grf_sprite->sprite = SPR_IMG_QUERY;
grf_sprite->pal = PAL_NONE;
} else {
SpriteID sprite = use_cur_spritesets ? _cur.GetSprite(feature, index) : index;
if (max_sprite_offset != nullptr) *max_sprite_offset = use_cur_spritesets ? _cur.GetNumEnts(feature, index) : UINT16_MAX;
SB(grf_sprite->sprite, 0, SPRITE_WIDTH, sprite);
SetBit(grf_sprite->sprite, SPRITE_MODIFIER_CUSTOM_SPRITE);
}
} else if ((flags & TLF_SPRITE_VAR10) && !(flags & TLF_SPRITE_REG_FLAGS)) {
grfmsg(1, "ReadSpriteLayoutSprite: Spritelayout specifies var10 value for non-action-1 sprite");
DisableGrf(STR_NEWGRF_ERROR_INVALID_SPRITE_LAYOUT);
return flags;
}
if (flags & TLF_CUSTOM_PALETTE) {
/* Use palette from Action 1 */
uint index = GB(grf_sprite->pal, 0, 14);
if (use_cur_spritesets && (!_cur.IsValidSpriteSet(feature, index) || _cur.GetNumEnts(feature, index) == 0)) {
grfmsg(1, "ReadSpriteLayoutSprite: Spritelayout uses undefined custom spriteset %d for 'palette'", index);
grf_sprite->pal = PAL_NONE;
} else {
SpriteID sprite = use_cur_spritesets ? _cur.GetSprite(feature, index) : index;
if (max_palette_offset != nullptr) *max_palette_offset = use_cur_spritesets ? _cur.GetNumEnts(feature, index) : UINT16_MAX;
SB(grf_sprite->pal, 0, SPRITE_WIDTH, sprite);
SetBit(grf_sprite->pal, SPRITE_MODIFIER_CUSTOM_SPRITE);
}
} else if ((flags & TLF_PALETTE_VAR10) && !(flags & TLF_PALETTE_REG_FLAGS)) {
grfmsg(1, "ReadSpriteLayoutRegisters: Spritelayout specifies var10 value for non-action-1 palette");
DisableGrf(STR_NEWGRF_ERROR_INVALID_SPRITE_LAYOUT);
return flags;
}
return flags;
}
/**
* Preprocess the TileLayoutFlags and read register modifiers from the GRF.
* @param buf Input stream.
* @param flags TileLayoutFlags to process.
* @param is_parent Whether the sprite is a parentsprite with a bounding box.
* @param dts Sprite layout to insert data into.
* @param index Sprite index to process; 0 for ground sprite.
*/
static void ReadSpriteLayoutRegisters(ByteReader *buf, TileLayoutFlags flags, bool is_parent, NewGRFSpriteLayout *dts, uint index)
{
if (!(flags & TLF_DRAWING_FLAGS)) return;
if (dts->registers == nullptr) dts->AllocateRegisters();
TileLayoutRegisters ®s = const_cast<TileLayoutRegisters&>(dts->registers[index]);
regs.flags = flags & TLF_DRAWING_FLAGS;
if (flags & TLF_DODRAW) regs.dodraw = buf->ReadByte();
if (flags & TLF_SPRITE) regs.sprite = buf->ReadByte();
if (flags & TLF_PALETTE) regs.palette = buf->ReadByte();
if (is_parent) {
if (flags & TLF_BB_XY_OFFSET) {
regs.delta.parent[0] = buf->ReadByte();
regs.delta.parent[1] = buf->ReadByte();
}
if (flags & TLF_BB_Z_OFFSET) regs.delta.parent[2] = buf->ReadByte();
} else {
if (flags & TLF_CHILD_X_OFFSET) regs.delta.child[0] = buf->ReadByte();
if (flags & TLF_CHILD_Y_OFFSET) regs.delta.child[1] = buf->ReadByte();
}
if (flags & TLF_SPRITE_VAR10) {
regs.sprite_var10 = buf->ReadByte();
if (regs.sprite_var10 > TLR_MAX_VAR10) {
grfmsg(1, "ReadSpriteLayoutRegisters: Spritelayout specifies var10 (%d) exceeding the maximal allowed value %d", regs.sprite_var10, TLR_MAX_VAR10);
DisableGrf(STR_NEWGRF_ERROR_INVALID_SPRITE_LAYOUT);
return;
}
}
if (flags & TLF_PALETTE_VAR10) {
regs.palette_var10 = buf->ReadByte();
if (regs.palette_var10 > TLR_MAX_VAR10) {
grfmsg(1, "ReadSpriteLayoutRegisters: Spritelayout specifies var10 (%d) exceeding the maximal allowed value %d", regs.palette_var10, TLR_MAX_VAR10);
DisableGrf(STR_NEWGRF_ERROR_INVALID_SPRITE_LAYOUT);
return;
}
}
}
/**
* Read a spritelayout from the GRF.
* @param buf Input
* @param num_building_sprites Number of building sprites to read
* @param use_cur_spritesets Whether to use currently referenceable action 1 sets.
* @param feature GrfSpecFeature to use spritesets from.
* @param allow_var10 Whether the spritelayout may specify var10 values for resolving multiple action-1-2-3 chains
* @param no_z_position Whether bounding boxes have no Z offset
* @param dts Layout container to output into
* @return True on error (GRF was disabled).
*/
static bool ReadSpriteLayout(ByteReader *buf, uint num_building_sprites, bool use_cur_spritesets, byte feature, bool allow_var10, bool no_z_position, NewGRFSpriteLayout *dts)
{
bool has_flags = HasBit(num_building_sprites, 6);
ClrBit(num_building_sprites, 6);
TileLayoutFlags valid_flags = TLF_KNOWN_FLAGS;
if (!allow_var10) valid_flags &= ~TLF_VAR10_FLAGS;
dts->Allocate(num_building_sprites); // allocate before reading groundsprite flags
uint16 *max_sprite_offset = AllocaM(uint16, num_building_sprites + 1);
uint16 *max_palette_offset = AllocaM(uint16, num_building_sprites + 1);
MemSetT(max_sprite_offset, 0, num_building_sprites + 1);
MemSetT(max_palette_offset, 0, num_building_sprites + 1);
/* Groundsprite */
TileLayoutFlags flags = ReadSpriteLayoutSprite(buf, has_flags, false, use_cur_spritesets, feature, &dts->ground, max_sprite_offset, max_palette_offset);
if (_cur.skip_sprites < 0) return true;
if (flags & ~(valid_flags & ~TLF_NON_GROUND_FLAGS)) {
grfmsg(1, "ReadSpriteLayout: Spritelayout uses invalid flag 0x%x for ground sprite", flags & ~(valid_flags & ~TLF_NON_GROUND_FLAGS));
DisableGrf(STR_NEWGRF_ERROR_INVALID_SPRITE_LAYOUT);
return true;
}
ReadSpriteLayoutRegisters(buf, flags, false, dts, 0);
if (_cur.skip_sprites < 0) return true;
for (uint i = 0; i < num_building_sprites; i++) {
DrawTileSeqStruct *seq = const_cast<DrawTileSeqStruct*>(&dts->seq[i]);
flags = ReadSpriteLayoutSprite(buf, has_flags, false, use_cur_spritesets, feature, &seq->image, max_sprite_offset + i + 1, max_palette_offset + i + 1);
if (_cur.skip_sprites < 0) return true;
if (flags & ~valid_flags) {
grfmsg(1, "ReadSpriteLayout: Spritelayout uses unknown flag 0x%x", flags & ~valid_flags);
DisableGrf(STR_NEWGRF_ERROR_INVALID_SPRITE_LAYOUT);
return true;
}
seq->delta_x = buf->ReadByte();
seq->delta_y = buf->ReadByte();
if (!no_z_position) seq->delta_z = buf->ReadByte();
if (seq->IsParentSprite()) {
seq->size_x = buf->ReadByte();
seq->size_y = buf->ReadByte();
seq->size_z = buf->ReadByte();
}
ReadSpriteLayoutRegisters(buf, flags, seq->IsParentSprite(), dts, i + 1);
if (_cur.skip_sprites < 0) return true;
}
/* Check if the number of sprites per spriteset is consistent */
bool is_consistent = true;
dts->consistent_max_offset = 0;
for (uint i = 0; i < num_building_sprites + 1; i++) {
if (max_sprite_offset[i] > 0) {
if (dts->consistent_max_offset == 0) {
dts->consistent_max_offset = max_sprite_offset[i];
} else if (dts->consistent_max_offset != max_sprite_offset[i]) {
is_consistent = false;
break;
}
}
if (max_palette_offset[i] > 0) {
if (dts->consistent_max_offset == 0) {
dts->consistent_max_offset = max_palette_offset[i];
} else if (dts->consistent_max_offset != max_palette_offset[i]) {
is_consistent = false;
break;
}
}
}
/* When the Action1 sets are unknown, everything should be 0 (no spriteset usage) or UINT16_MAX (some spriteset usage) */
assert(use_cur_spritesets || (is_consistent && (dts->consistent_max_offset == 0 || dts->consistent_max_offset == UINT16_MAX)));
if (!is_consistent || dts->registers != nullptr) {
dts->consistent_max_offset = 0;
if (dts->registers == nullptr) dts->AllocateRegisters();
for (uint i = 0; i < num_building_sprites + 1; i++) {
TileLayoutRegisters ®s = const_cast<TileLayoutRegisters&>(dts->registers[i]);
regs.max_sprite_offset = max_sprite_offset[i];
regs.max_palette_offset = max_palette_offset[i];
}
}
return false;
}
/**
* Translate the refit mask. refit_mask is uint32 as it has not been mapped to CargoTypes.
*/
static CargoTypes TranslateRefitMask(uint32 refit_mask)
{
CargoTypes result = 0;
for (uint8 bit : SetBitIterator(refit_mask)) {
CargoID cargo = GetCargoTranslation(bit, _cur.grffile, true);
if (cargo != CT_INVALID) SetBit(result, cargo);
}
return result;
}
/**
* Converts TTD(P) Base Price pointers into the enum used by OTTD
* See http://wiki.ttdpatch.net/tiki-index.php?page=BaseCosts
* @param base_pointer TTD(P) Base Price Pointer
* @param error_location Function name for grf error messages
* @param[out] index If \a base_pointer is valid, \a index is assigned to the matching price; else it is left unchanged
*/
static void ConvertTTDBasePrice(uint32 base_pointer, const char *error_location, Price *index)
{
/* Special value for 'none' */
if (base_pointer == 0) {
*index = INVALID_PRICE;
return;
}
static const uint32 start = 0x4B34; ///< Position of first base price
static const uint32 size = 6; ///< Size of each base price record
if (base_pointer < start || (base_pointer - start) % size != 0 || (base_pointer - start) / size >= PR_END) {
grfmsg(1, "%s: Unsupported running cost base 0x%04X, ignoring", error_location, base_pointer);
return;
}
*index = (Price)((base_pointer - start) / size);
}
/** Possible return values for the FeatureChangeInfo functions */
enum ChangeInfoResult {
CIR_SUCCESS, ///< Variable was parsed and read
CIR_DISABLED, ///< GRF was disabled due to error
CIR_UNHANDLED, ///< Variable was parsed but unread
CIR_UNKNOWN, ///< Variable is unknown
CIR_INVALID_ID, ///< Attempt to modify an invalid ID
};
typedef ChangeInfoResult (*VCI_Handler)(uint engine, int numinfo, int prop, ByteReader *buf);