cargotype.cpp

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00001 /* $Id: cargotype.cpp 18413 2009-12-05 21:39:28Z alberth $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * 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.
00006  * 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.
00007  * 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/>.
00008  */
00009 
00012 #include "stdafx.h"
00013 #include "cargotype.h"
00014 #include "core/bitmath_func.hpp"
00015 #include "newgrf_cargo.h"
00016 
00017 #include "table/sprites.h"
00018 #include "table/strings.h"
00019 #include "table/cargo_const.h"
00020 
00021 CargoSpec CargoSpec::array[NUM_CARGO];
00022 
00026 uint32 _cargo_mask;
00027 
00031 void SetupCargoForClimate(LandscapeID l)
00032 {
00033   assert(l < lengthof(_default_climate_cargo));
00034 
00035   /* Reset and disable all cargo types */
00036   memset(CargoSpec::array, 0, sizeof(CargoSpec::array));
00037   for (CargoID i = 0; i < lengthof(CargoSpec::array); i++) CargoSpec::Get(i)->bitnum = INVALID_CARGO;
00038 
00039   _cargo_mask = 0;
00040 
00041   for (CargoID i = 0; i < lengthof(_default_climate_cargo[l]); i++) {
00042     CargoLabel cl = _default_climate_cargo[l][i];
00043 
00044     /* Bzzt: check if cl is just an index into the cargo table */
00045     if (cl < lengthof(_default_cargo)) {
00046       /* Copy the indexed cargo */
00047       CargoSpec *cargo = CargoSpec::Get(i);
00048       *cargo = _default_cargo[cl];
00049       if (cargo->bitnum != INVALID_CARGO) SetBit(_cargo_mask, i);
00050       continue;
00051     }
00052 
00053     /* Loop through each of the default cargo types to see if
00054      * the label matches */
00055     for (uint j = 0; j < lengthof(_default_cargo); j++) {
00056       if (_default_cargo[j].label == cl) {
00057         *CargoSpec::Get(i) = _default_cargo[j];
00058 
00059         /* Populate the available cargo mask */
00060         SetBit(_cargo_mask, i);
00061         break;
00062       }
00063     }
00064   }
00065 }
00066 
00071 CargoID GetCargoIDByLabel(CargoLabel cl)
00072 {
00073   const CargoSpec *cs;
00074   FOR_ALL_CARGOSPECS(cs) {
00075     if (cs->label == cl) return cs->Index();
00076   }
00077 
00078   /* No matching label was found, so it is invalid */
00079   return CT_INVALID;
00080 }
00081 
00082 
00087 CargoID GetCargoIDByBitnum(uint8 bitnum)
00088 {
00089   if (bitnum == INVALID_CARGO) return CT_INVALID;
00090 
00091   const CargoSpec *cs;
00092   FOR_ALL_CARGOSPECS(cs) {
00093     if (cs->bitnum == bitnum) return cs->Index();
00094   }
00095 
00096   /* No matching label was found, so it is invalid */
00097   return CT_INVALID;
00098 }
00099 
00103 SpriteID CargoSpec::GetCargoIcon() const
00104 {
00105   SpriteID sprite = this->sprite;
00106   if (sprite == 0xFFFF) {
00107     /* A value of 0xFFFF indicates we should draw a custom icon */
00108     sprite = GetCustomCargoSprite(this);
00109   }
00110 
00111   if (sprite == 0) sprite = SPR_CARGO_GOODS;
00112 
00113   return sprite;
00114 }
00115 

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