1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/* $Id$ */
/*
* 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_railtype.cpp NewGRF handling of rail types. */
#include "stdafx.h"
#include "debug.h"
#include "newgrf_spritegroup.h"
#include "date_func.h"
#include "depot_base.h"
#include "town.h"
static uint32 RailTypeGetRandomBits(const ResolverObject *object)
{
TileIndex tile = object->u.routes.tile;
uint tmp = CountBits(tile + (TileX(tile) + TileY(tile)) * TILE_SIZE);
return GB(tmp, 0, 2);
}
static uint32 RailTypeGetTriggers(const ResolverObject *object)
{
return 0;
}
static void RailTypeSetTriggers(const ResolverObject *object, int triggers)
{
}
static uint32 RailTypeGetVariable(const ResolverObject *object, byte variable, uint32 parameter, bool *available)
{
TileIndex tile = object->u.routes.tile;
if (tile == INVALID_TILE) {
switch (variable) {
case 0x40: return 0;
case 0x41: return 0;
case 0x42: return 0;
case 0x43: return _date;
case 0x44: return HZB_TOWN_EDGE;
}
}
switch (variable) {
case 0x40: return GetTerrainType(tile, object->u.routes.context);
case 0x41: return 0;
case 0x42: return IsLevelCrossingTile(tile) && IsCrossingBarred(tile);
case 0x43:
if (IsRailDepotTile(tile)) return Depot::GetByTile(tile)->build_date;
return _date;
case 0x44: {
const Town *t = NULL;
if (IsRailDepotTile(tile)) {
t = Depot::GetByTile(tile)->town;
} else if (IsLevelCrossingTile(tile)) {
t = ClosestTownFromTile(tile, UINT_MAX);
}
return t != NULL ? GetTownRadiusGroup(t, tile) : HZB_TOWN_EDGE;
}
}
DEBUG(grf, 1, "Unhandled rail type tile variable 0x%X", variable);
*available = false;
return UINT_MAX;
}
static const SpriteGroup *RailTypeResolveReal(const ResolverObject *object, const RealSpriteGroup *group)
{
if (group->num_loading > 0) return group->loading[0];
if (group->num_loaded > 0) return group->loaded[0];
return NULL;
}
static inline void NewRailTypeResolver(ResolverObject *res, TileIndex tile, TileContext context, const GRFFile *grffile)
{
res->GetRandomBits = &RailTypeGetRandomBits;
res->GetTriggers = &RailTypeGetTriggers;
res->SetTriggers = &RailTypeSetTriggers;
res->GetVariable = &RailTypeGetVariable;
res->ResolveReal = &RailTypeResolveReal;
res->u.routes.tile = tile;
res->u.routes.context = context;
res->callback = CBID_NO_CALLBACK;
res->callback_param1 = 0;
res->callback_param2 = 0;
res->ResetState();
res->grffile = grffile;
}
/**
* Get the sprite to draw for the given tile.
* @param rti The rail type data (spec).
* @param tile The tile to get the sprite for.
* @param rtsg The type of sprite to draw.
* @param content Where are we drawing the tile?
* @return The sprite to draw.
*/
SpriteID GetCustomRailSprite(const RailtypeInfo *rti, TileIndex tile, RailTypeSpriteGroup rtsg, TileContext context)
{
assert(rtsg < RTSG_END);
if (rti->group[rtsg] == NULL) return 0;
const SpriteGroup *group;
ResolverObject object;
NewRailTypeResolver(&object, tile, context, rti->grffile[rtsg]);
group = SpriteGroup::Resolve(rti->group[rtsg], &object);
if (group == NULL || group->GetNumResults() == 0) return 0;
return group->GetResult();
}
/**
* Perform a reverse railtype lookup to get the GRF internal ID.
* @param railtype The global (OpenTTD) railtype.
* @param grffile The GRF to do the lookup for.
* @return the GRF internal ID.
*/
uint8 GetReverseRailTypeTranslation(RailType railtype, const GRFFile *grffile)
{
/* No rail type table present, return rail type as-is */
if (grffile == NULL || grffile->railtype_list.Length() == 0) return railtype;
/* Look for a matching rail type label in the table */
RailTypeLabel label = GetRailTypeInfo(railtype)->label;
int index = grffile->railtype_list.FindIndex(label);
if (index >= 0) return index;
/* If not found, return as invalid */
return 0xFF;
}
/**
* Resolve a railtypes's spec and such so we can get a variable.
* @param ro The resolver object to fill.
* @param index The rail tile to get the data from.
*/
void GetRailTypeResolver(ResolverObject *ro, uint index)
{
/* There is no unique GRFFile for the tile. Multiple GRFs can define different parts of the railtype.
* However, currently the NewGRF Debug GUI does not display variables depending on the GRF (like 0x7F) anyway. */
NewRailTypeResolver(ro, index, TCX_NORMAL, NULL);
}
|
