newgrf_cargo.cpp
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00002
00005 #include "stdafx.h"
00006 #include "debug.h"
00007 #include "newgrf.h"
00008 #include "newgrf_spritegroup.h"
00009 #include "newgrf_cargo.h"
00010
00011 static uint32 CargoGetRandomBits(const ResolverObject *object)
00012 {
00013 return 0;
00014 }
00015
00016
00017 static uint32 CargoGetTriggers(const ResolverObject *object)
00018 {
00019 return 0;
00020 }
00021
00022
00023 static void CargoSetTriggers(const ResolverObject *object, int triggers)
00024 {
00025 return;
00026 }
00027
00028
00029 static uint32 CargoGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
00030 {
00031 DEBUG(grf, 1, "Unhandled cargo property 0x%X", variable);
00032
00033 *available = false;
00034 return UINT_MAX;
00035 }
00036
00037
00038 static const SpriteGroup *CargoResolveReal(const ResolverObject *object, const SpriteGroup *group)
00039 {
00040
00041
00042 if (group->g.real.num_loaded > 0) return group->g.real.loaded[0];
00043 if (group->g.real.num_loading > 0) return group->g.real.loading[0];
00044
00045 return NULL;
00046 }
00047
00048
00049 static void NewCargoResolver(ResolverObject *res, const CargoSpec *cs)
00050 {
00051 res->GetRandomBits = &CargoGetRandomBits;
00052 res->GetTriggers = &CargoGetTriggers;
00053 res->SetTriggers = &CargoSetTriggers;
00054 res->GetVariable = &CargoGetVariable;
00055 res->ResolveReal = &CargoResolveReal;
00056
00057 res->u.cargo.cs = cs;
00058
00059 res->callback = CBID_NO_CALLBACK;
00060 res->callback_param1 = 0;
00061 res->callback_param2 = 0;
00062 res->last_value = 0;
00063 res->trigger = 0;
00064 res->reseed = 0;
00065 res->count = 0;
00066 res->grffile = cs->grffile;
00067 }
00068
00069
00070 SpriteID GetCustomCargoSprite(const CargoSpec *cs)
00071 {
00072 const SpriteGroup *group;
00073 ResolverObject object;
00074
00075 NewCargoResolver(&object, cs);
00076
00077 group = Resolve(cs->group, &object);
00078 if (group == NULL || group->type != SGT_RESULT) return 0;
00079
00080 return group->g.result.sprite;
00081 }
00082
00083
00084 uint16 GetCargoCallback(CallbackID callback, uint32 param1, uint32 param2, const CargoSpec *cs)
00085 {
00086 ResolverObject object;
00087 const SpriteGroup *group;
00088
00089 NewCargoResolver(&object, cs);
00090 object.callback = callback;
00091 object.callback_param1 = param1;
00092 object.callback_param2 = param2;
00093
00094 group = Resolve(cs->group, &object);
00095 if (group == NULL || group->type != SGT_CALLBACK) return CALLBACK_FAILED;
00096
00097 return group->g.callback.result;
00098 }
00099
00100
00101 CargoID GetCargoTranslation(uint8 cargo, const GRFFile *grffile, bool usebit)
00102 {
00103
00104 if (grffile->grf_version < 7) {
00105 if (!usebit) return cargo;
00106
00107 if (HasBit(_cargo_mask, cargo)) return GetCargoIDByBitnum(cargo);
00108 } else {
00109
00110 if (grffile->cargo_max > 0) {
00111
00112
00113 if (cargo < grffile->cargo_max) return GetCargoIDByLabel(grffile->cargo_list[cargo]);
00114 } else {
00115
00116 if (HasBit(_cargo_mask, cargo)) return GetCargoIDByBitnum(cargo);
00117 }
00118 }
00119 return CT_INVALID;
00120 }
00121
00122 uint8 GetReverseCargoTranslation(CargoID cargo, const GRFFile *grffile)
00123 {
00124
00125 const CargoSpec *cs = GetCargo(cargo);
00126
00127
00128
00129 for (uint i = 0; i < grffile->cargo_max; i++) {
00130 if (cs->label == grffile->cargo_list[i]) return i;
00131 }
00132
00133
00134 return cs->bitnum;;
00135 }