OpenTTD Source 20241224-master-gf74b0cf984
newgrf_commons.h File Reference

This file simplyfies and embeds a common mechanism of loading/saving and mapping of grf entities. More...

#include "sprite.h"
#include "core/alloc_type.hpp"
#include "command_type.h"
#include "direction_type.h"
#include "company_type.h"

Go to the source code of this file.

Data Structures

struct  TileLayoutRegisters
 Additional modifiers for items in sprite layouts. More...
 
struct  NewGRFSpriteLayout
 NewGRF supplied spritelayout. More...
 
struct  EntityIDMapping
 Maps an entity id stored on the map to a GRF file. More...
 
class  OverrideManagerBase
 
class  HouseOverrideManager
 
class  IndustryOverrideManager
 
class  IndustryTileOverrideManager
 
class  AirportOverrideManager
 
class  AirportTileOverrideManager
 
class  ObjectOverrideManager
 
struct  GRFFilePropsBase< Tcnt >
 Data related to the handling of grf files. More...
 
struct  GRFFileProps
 Data related to the handling of grf files. More...
 

Enumerations

enum  TileContext { TCX_NORMAL , TCX_UPPER_HALFTILE , TCX_ON_BRIDGE }
 Context for tile accesses. More...
 
enum  TileLayoutFlags {
  TLF_NOTHING = 0x00 , TLF_DODRAW = 0x01 , TLF_SPRITE = 0x02 , TLF_PALETTE = 0x04 ,
  TLF_CUSTOM_PALETTE = 0x08 , TLF_BB_XY_OFFSET = 0x10 , TLF_BB_Z_OFFSET = 0x20 , TLF_CHILD_X_OFFSET = 0x10 ,
  TLF_CHILD_Y_OFFSET = 0x20 , TLF_SPRITE_VAR10 = 0x40 , TLF_PALETTE_VAR10 = 0x80 , TLF_KNOWN_FLAGS = 0xFF ,
  TLF_DRAWING_FLAGS = ~TLF_CUSTOM_PALETTE , TLF_NON_GROUND_FLAGS = TLF_BB_XY_OFFSET | TLF_BB_Z_OFFSET | TLF_CHILD_X_OFFSET | TLF_CHILD_Y_OFFSET , TLF_VAR10_FLAGS = TLF_SPRITE_VAR10 | TLF_PALETTE_VAR10 , TLF_SPRITE_REG_FLAGS = TLF_DODRAW | TLF_SPRITE | TLF_BB_XY_OFFSET | TLF_BB_Z_OFFSET | TLF_CHILD_X_OFFSET | TLF_CHILD_Y_OFFSET ,
  TLF_PALETTE_REG_FLAGS = TLF_PALETTE
}
 Flags to enable register usage in sprite layouts. More...
 

Functions

uint GetConstructionStageOffset (uint construction_stage, uint num_sprites)
 Determines which sprite to use from a spriteset for a specific construction stage.
 
uint32_t GetTerrainType (TileIndex tile, TileContext context=TCX_NORMAL)
 Function used by houses (and soon industries) to get information on type of "terrain" the tile it is queries sits on.
 
TileIndex GetNearbyTile (uint8_t parameter, TileIndex tile, bool signed_offsets=true, Axis axis=INVALID_AXIS)
 Get the tile at the given offset.
 
uint32_t GetNearbyTileInformation (TileIndex tile, bool grf_version8)
 Common part of station var 0x67, house var 0x62, indtile var 0x60, industry var 0x62.
 
uint32_t GetCompanyInfo (CompanyID owner, const struct Livery *l=nullptr)
 
CommandCost GetErrorMessageFromLocationCallbackResult (uint16_t cb_res, const GRFFile *grffile, StringID default_error)
 Get the error message from a shape/location/slope check callback result.
 
void ErrorUnknownCallbackResult (uint32_t grfid, uint16_t cbid, uint16_t cb_res)
 Record that a NewGRF returned an unknown/invalid callback result.
 
bool ConvertBooleanCallback (const struct GRFFile *grffile, uint16_t cbid, uint16_t cb_res)
 
bool Convert8bitBooleanCallback (const struct GRFFile *grffile, uint16_t cbid, uint16_t cb_res)
 

Variables

static const uint TLR_MAX_VAR10 = 7
 Maximum value for var 10.
 
HouseOverrideManager _house_mngr
 
IndustryOverrideManager _industry_mngr
 
IndustryTileOverrideManager _industile_mngr
 
AirportOverrideManager _airport_mngr
 
AirportTileOverrideManager _airporttile_mngr
 
ObjectOverrideManager _object_mngr
 

Detailed Description

This file simplyfies and embeds a common mechanism of loading/saving and mapping of grf entities.

Definition in file newgrf_commons.h.

Enumeration Type Documentation

◆ TileContext

Context for tile accesses.

Enumerator
TCX_NORMAL 

Nothing special.

TCX_UPPER_HALFTILE 

Querying information about the upper part of a tile with halftile foundation.

TCX_ON_BRIDGE 

Querying information about stuff on the bridge (via some bridgehead).

Definition at line 23 of file newgrf_commons.h.

◆ TileLayoutFlags

Flags to enable register usage in sprite layouts.

Enumerator
TLF_DODRAW 

Only draw sprite if value of register TileLayoutRegisters::dodraw is non-zero.

TLF_SPRITE 

Add signed offset to sprite from register TileLayoutRegisters::sprite.

TLF_PALETTE 

Add signed offset to palette from register TileLayoutRegisters::palette.

TLF_CUSTOM_PALETTE 

Palette is from Action 1 (moved to SPRITE_MODIFIER_CUSTOM_SPRITE in palette during loading).

TLF_BB_XY_OFFSET 

Add signed offset to bounding box X and Y positions from register TileLayoutRegisters::delta.parent[0..1].

TLF_BB_Z_OFFSET 

Add signed offset to bounding box Z positions from register TileLayoutRegisters::delta.parent[2].

TLF_CHILD_X_OFFSET 

Add signed offset to child sprite X positions from register TileLayoutRegisters::delta.child[0].

TLF_CHILD_Y_OFFSET 

Add signed offset to child sprite Y positions from register TileLayoutRegisters::delta.child[1].

TLF_SPRITE_VAR10 

Resolve sprite with a specific value in variable 10.

TLF_PALETTE_VAR10 

Resolve palette with a specific value in variable 10.

TLF_KNOWN_FLAGS 

Known flags. Any unknown set flag will disable the GRF.

TLF_DRAWING_FLAGS 

Flags which are still required after loading the GRF.

TLF_NON_GROUND_FLAGS 

Flags which do not work for the (first) ground sprite.

TLF_VAR10_FLAGS 

Flags which refer to using multiple action-1-2-3 chains.

TLF_SPRITE_REG_FLAGS 

Flags which require resolving the action-1-2-3 chain for the sprite, even if it is no action-1 sprite.

TLF_PALETTE_REG_FLAGS 

Flags which require resolving the action-1-2-3 chain for the palette, even if it is no action-1 palette.

Definition at line 32 of file newgrf_commons.h.

Function Documentation

◆ ErrorUnknownCallbackResult()

◆ GetConstructionStageOffset()

uint GetConstructionStageOffset ( uint  construction_stage,
uint  num_sprites 
)
inline

Determines which sprite to use from a spriteset for a specific construction stage.

Parameters
construction_stageConstruction stage 0 - 3.
num_spritesNumber of available sprites to select stage from.
Returns
Sprite to use

Definition at line 74 of file newgrf_commons.h.

Referenced by NewGRFSpriteLayout::PrepareLayout(), and TileLayoutSpriteGroup::ProcessRegisters().

◆ GetErrorMessageFromLocationCallbackResult()

CommandCost GetErrorMessageFromLocationCallbackResult ( uint16_t  cb_res,
const GRFFile grffile,
StringID  default_error 
)

Get the error message from a shape/location/slope check callback result.

Parameters
cb_resCallback result to translate. If bit 10 is set this is a standard error message, otherwise a NewGRF provided string.
grffileNewGRF to use to resolve a custom error message.
default_errorError message to use for the generic error.
Returns
CommandCost indicating success or the error message.

Definition at line 469 of file newgrf_commons.cpp.

References GetGRFStringID(), and CommandCost::UseTextRefStack().

Referenced by CheckIfCallBackAllowsCreation(), CmdBuildObject(), PerformIndustryTileSlopeCheck(), and PerformStationTileSlopeCheck().

◆ GetNearbyTile()

TileIndex GetNearbyTile ( uint8_t  parameter,
TileIndex  tile,
bool  signed_offsets,
Axis  axis 
)

Get the tile at the given offset.

Parameters
parameterThe NewGRF "encoded" offset.
tileThe tile to base the offset from.
signed_offsetsWhether the offsets are to be interpreted as signed or not.
axisAxis of a railways station.
Returns
The tile at the offset.

Definition at line 410 of file newgrf_commons.cpp.

References AXIS_Y, GB(), GetRailStationAxis(), HasStationTileRail(), INVALID_AXIS, Swap(), TileDiffXY(), and Map::WrapToMap().

Referenced by GetNearbyAirportTileInformation(), GetNearbyIndustryTileInformation(), GetNearbyObjectTileInformation(), GetNearbyTileInformation(), AirportTileScopeResolver::GetVariable(), HouseScopeResolver::GetVariable(), IndustriesScopeResolver::GetVariable(), IndustryTileScopeResolver::GetVariable(), ObjectScopeResolver::GetVariable(), RoadStopScopeResolver::GetVariable(), and StationScopeResolver::GetVariable().

◆ GetNearbyTileInformation()

uint32_t GetNearbyTileInformation ( TileIndex  tile,
bool  grf_version8 
)

Common part of station var 0x67, house var 0x62, indtile var 0x60, industry var 0x62.

Parameters
tilethe tile of interest.
grf_version8True, if we are dealing with a new NewGRF which uses GRF version >= 8.
Returns
0czzbbss: c = TileType; zz = TileZ; bb: 7-3 zero, 4-2 TerrainType, 1 water/shore, 0 zero; ss = TileSlope

Definition at line 433 of file newgrf_commons.cpp.

References GetTerrainType(), GetTilePixelSlope(), GetTileType(), GetTreeGround(), GetWaterClass(), HasTileWaterClass(), IsRoadWaypointTile(), IsTileType(), MP_ROAD, MP_TREES, MP_WATER, TILE_HEIGHT, and TREE_GROUND_SHORE.

Referenced by GetNearbyAirportTileInformation(), GetNearbyIndustryTileInformation(), GetNearbyObjectTileInformation(), HouseScopeResolver::GetVariable(), RoadStopScopeResolver::GetVariable(), and StationScopeResolver::GetVariable().

◆ GetTerrainType()

Variable Documentation

◆ TLR_MAX_VAR10

const uint TLR_MAX_VAR10 = 7
static

Maximum value for var 10.

Definition at line 105 of file newgrf_commons.h.

Referenced by ReadSpriteLayoutRegisters().