143 lines
4.1 KiB
C++
143 lines
4.1 KiB
C++
/* $Id$ */
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/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file newgrf_cargo.cpp Implementation of NewGRF cargoes. */
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#include "stdafx.h"
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#include "debug.h"
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#include "newgrf.h"
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#include "newgrf_spritegroup.h"
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#include "core/bitmath_func.hpp"
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static uint32 CargoGetRandomBits(const ResolverObject *object)
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{
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return 0;
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}
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static uint32 CargoGetTriggers(const ResolverObject *object)
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{
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return 0;
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}
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static void CargoSetTriggers(const ResolverObject *object, int triggers)
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{
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return;
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}
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static uint32 CargoGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
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{
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DEBUG(grf, 1, "Unhandled cargo property 0x%X", variable);
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*available = false;
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return UINT_MAX;
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}
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static const SpriteGroup *CargoResolveReal(const ResolverObject *object, const RealSpriteGroup *group)
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{
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/* Cargo action 2s should always have only 1 "loaded" state, but some
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* times things don't follow the spec... */
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if (group->num_loaded > 0) return group->loaded[0];
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if (group->num_loading > 0) return group->loading[0];
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return NULL;
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}
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static void NewCargoResolver(ResolverObject *res, const CargoSpec *cs)
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{
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res->GetRandomBits = &CargoGetRandomBits;
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res->GetTriggers = &CargoGetTriggers;
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res->SetTriggers = &CargoSetTriggers;
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res->GetVariable = &CargoGetVariable;
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res->ResolveReal = &CargoResolveReal;
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res->u.cargo.cs = cs;
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res->callback = CBID_NO_CALLBACK;
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res->callback_param1 = 0;
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res->callback_param2 = 0;
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res->last_value = 0;
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res->trigger = 0;
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res->reseed = 0;
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res->count = 0;
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res->grffile = cs->grffile;
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}
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SpriteID GetCustomCargoSprite(const CargoSpec *cs)
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{
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const SpriteGroup *group;
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ResolverObject object;
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NewCargoResolver(&object, cs);
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group = SpriteGroup::Resolve(cs->group, &object);
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if (group == NULL) return 0;
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return group->GetResult();
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}
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uint16 GetCargoCallback(CallbackID callback, uint32 param1, uint32 param2, const CargoSpec *cs)
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{
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ResolverObject object;
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const SpriteGroup *group;
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NewCargoResolver(&object, cs);
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object.callback = callback;
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object.callback_param1 = param1;
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object.callback_param2 = param2;
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group = SpriteGroup::Resolve(cs->group, &object);
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if (group == NULL) return CALLBACK_FAILED;
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return group->GetCallbackResult();
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}
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CargoID GetCargoTranslation(uint8 cargo, const GRFFile *grffile, bool usebit)
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{
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/* Pre-version 7 uses the 'climate dependent' ID, i.e. cargo is the cargo ID */
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if (grffile->grf_version < 7) {
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if (!usebit) return cargo;
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/* Else the cargo value is a 'climate independent' 'bitnum' */
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if (HasBit(_cargo_mask, cargo)) return GetCargoIDByBitnum(cargo);
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} else {
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/* If the GRF contains a translation table... */
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if (grffile->cargo_max > 0) {
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/* ...and the cargo is in bounds, then get the cargo ID for
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* the label */
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if (cargo < grffile->cargo_max) return GetCargoIDByLabel(grffile->cargo_list[cargo]);
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} else {
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/* Else the cargo value is a 'climate independent' 'bitnum' */
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if (HasBit(_cargo_mask, cargo)) return GetCargoIDByBitnum(cargo);
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}
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}
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return CT_INVALID;
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}
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uint8 GetReverseCargoTranslation(CargoID cargo, const GRFFile *grffile)
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{
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/* Note: All grf versions use CargoBit here. Pre-version 7 do NOT use the 'climate dependent' ID. */
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const CargoSpec *cs = CargoSpec::Get(cargo);
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/* If the GRF contains a translation table (and the cargo is in the table)
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* then get the cargo ID for the label */
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for (uint i = 0; i < grffile->cargo_max; i++) {
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if (cs->label == grffile->cargo_list[i]) return i;
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}
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/* No matching label was found, so we return the 'climate independent' 'bitnum' */
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return cs->bitnum;
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}
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