# newgrf_industries.cpp

Go to the documentation of this file.

    00001 /* $Id: newgrf_industries.cpp 18988 2010-02-02 23:11:10Z yexo $ */
    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 "debug.h"
    00014 #include "industry.h"
    00015 #include "newgrf.h"
    00016 #include "newgrf_industries.h"
    00017 #include "newgrf_commons.h"
    00018 #include "newgrf_text.h"
    00019 #include "newgrf_town.h"
    00020 #include "window_func.h"
    00021 #include "town.h"
    00022 #include "company_base.h"
    00023 #include "command_func.h"
    00024 #include "gui.h"
    00025 #include "strings_func.h"
    00026 #include "core/random_func.hpp"
    00027
    00028 #include "table/strings.h"
    00029
    00030 static uint32 _industry_creation_random_bits;
    00031
    00032 /* Since the industry IDs defined by the GRF file don't necessarily correlate
    00033  * to those used by the game, the IDs used for overriding old industries must be
    00034  * translated when the idustry spec is set. */
    00035 IndustryOverrideManager _industry_mngr(NEW_INDUSTRYOFFSET, NUM_INDUSTRYTYPES, INVALID_INDUSTRYTYPE);
    00036 IndustryTileOverrideManager _industile_mngr(NEW_INDUSTRYTILEOFFSET, NUM_INDUSTRYTILES, INVALID_INDUSTRYTILE);
    00037
    00038 IndustryType MapNewGRFIndustryType(IndustryType grf_type, uint32 grf_id)
    00039 {
    00040   if (grf_type == IT_INVALID) return IT_INVALID;
    00041   if (!HasBit(grf_type, 7)) return GB(grf_type, 0, 6);
    00042
    00043   return _industry_mngr.GetID(GB(grf_type, 0, 6), grf_id);
    00044 }
    00045
    00054 uint32 GetIndustryIDAtOffset(TileIndex tile, const Industry *i, uint32 cur_grfid)
    00055 {
    00056   if (!IsTileType(tile, MP_INDUSTRY) || GetIndustryIndex(tile) != i->index) {
    00057     /* No industry and/or the tile does not have the same industry as the one we match it with */
    00058     return 0xFFFF;
    00059   }
    00060
    00061   IndustryGfx gfx = GetCleanIndustryGfx(tile);
    00062   const IndustryTileSpec *indtsp = GetIndustryTileSpec(gfx);
    00063
    00064   if (gfx < NEW_INDUSTRYOFFSET) { // Does it belongs to an old type?
    00065     /* It is an old tile.  We have to see if it's been overriden */
    00066     if (indtsp->grf_prop.override == INVALID_INDUSTRYTILE) { // has it been overridden?
    00067       return 0xFF << 8 | gfx; // no. Tag FF + the gfx id of that tile
    00068     }
    00069     /* Overriden */
    00070     const IndustryTileSpec *tile_ovr = GetIndustryTileSpec(indtsp->grf_prop.override);
    00071
    00072     if (tile_ovr->grf_prop.grffile->grfid == cur_grfid) {
    00073       return tile_ovr->grf_prop.local_id; // same grf file
    00074     } else {
    00075       return 0xFFFE; // not the same grf file
    00076     }
    00077   }
    00078   /* Not an 'old type' tile */
    00079   if (indtsp->grf_prop.spritegroup != NULL) { // tile has a spritegroup ?
    00080     if (indtsp->grf_prop.grffile->grfid == cur_grfid) { // same industry, same grf ?
    00081       return indtsp->grf_prop.local_id;
    00082     } else {
    00083       return 0xFFFE; // Defined in another grf file
    00084     }
    00085   }
    00086   /* The tile has no spritegroup */
    00087   return 0xFF << 8 | indtsp->grf_prop.subst_id; // so just give him the substitute
    00088 }
    00089
    00090 static uint32 GetClosestIndustry(TileIndex tile, IndustryType type, const Industry *current)
    00091 {
    00092   uint32 best_dist = UINT32_MAX;
    00093   const Industry *i;
    00094   FOR_ALL_INDUSTRIES(i) {
    00095     if (i->type != type || i == current) continue;
    00096
    00097     best_dist = min(best_dist, DistanceManhattan(tile, i->location.tile));
    00098   }
    00099
    00100   return best_dist;
    00101 }
    00102
    00111 static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout_filter, const Industry *current)
    00112 {
    00113   uint32 GrfID = GetRegister(0x100);
    00114   IndustryType ind_index;
    00115   uint32 closest_dist = UINT32_MAX;
    00116   byte count = 0;
    00117
    00118   /* Determine what will be the industry type to look for */
    00119   switch (GrfID) {
    00120     case 0:  // this is a default industry type
    00121       ind_index = param_setID;
    00122       break;
    00123
    00124     case 0xFFFFFFFF: // current grf
    00125       GrfID = GetIndustrySpec(current->type)->grf_prop.grffile->grfid;
    00126       /* Fall through */
    00127
    00128     default: // use the grfid specified in register 100h
    00129       SetBit(param_setID, 7); // bit 7 means it is not an old type
    00130       ind_index = MapNewGRFIndustryType(param_setID, GrfID);
    00131       break;
    00132   }
    00133
    00134   if (layout_filter == 0) {
    00135     /* If the filter is 0, it could be because none was specified as well as being really a 0.
    00136      * In either case, just do the regular var67 */
    00137     closest_dist = GetClosestIndustry(current->location.tile, ind_index, current);
    00138     count = GetIndustryTypeCount(ind_index);
    00139   } else {
    00140     /* Count only those who match the same industry type and layout filter
    00141      * Unfortunately, we have to do it manually */
    00142     const Industry *i;
    00143     FOR_ALL_INDUSTRIES(i) {
    00144       if (i->type == ind_index && i != current && i->selected_layout == layout_filter) {
    00145         closest_dist = min(closest_dist, DistanceManhattan(current->location.tile, i->location.tile));
    00146         count++;
    00147       }
    00148     }
    00149   }
    00150
    00151   return count << 16 | GB(closest_dist, 0, 16);
    00152 }
    00153
    00160 uint32 IndustryGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
    00161 {
    00162   const Industry *industry = object->u.industry.ind;
    00163   TileIndex tile = object->u.industry.tile;
    00164   IndustryType type = object->u.industry.type;
    00165   const IndustrySpec *indspec = GetIndustrySpec(type);
    00166
    00167   /* Shall the variable get resolved in parent scope and are we not yet in parent scope? */
    00168   if (object->u.industry.gfx == INVALID_INDUSTRYTILE && object->scope == VSG_SCOPE_PARENT) {
    00169     /* Pass the request on to the town of the industry */
    00170     const Town *t;
    00171
    00172     if (industry != NULL) {
    00173       t = industry->town;
    00174     } else if (tile != INVALID_TILE) {
    00175       t = ClosestTownFromTile(tile, UINT_MAX);
    00176     } else {
    00177       *available = false;
    00178       return UINT_MAX;
    00179     }
    00180
    00181     return TownGetVariable(variable, parameter, available, t);
    00182   }
    00183
    00184   if (industry == NULL) {
    00185     /* industry does not exist, only use those variables that are "safe" */
    00186     switch (variable) {
    00187       /* Manhattan distance of closes dry/water tile */
    00188       case 0x43: return GetClosestWaterDistance(tile, (indspec->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
    00189     }
    00190
    00191     DEBUG(grf, 1, "Unhandled property 0x%X (no available industry) in callback 0x%x", variable, object->callback);
    00192
    00193     *available = false;
    00194     return UINT_MAX;
    00195   }
    00196
    00197   switch (variable) {
    00198     case 0x40:
    00199     case 0x41:
    00200     case 0x42: { // waiting cargo, but only if those two callback flags are set
    00201       uint16 callback = indspec->callback_mask;
    00202       if (HasBit(callback, CBM_IND_PRODUCTION_CARGO_ARRIVAL) || HasBit(callback, CBM_IND_PRODUCTION_256_TICKS)) {
    00203         if ((indspec->behaviour & INDUSTRYBEH_PROD_MULTI_HNDLING) != 0) {
    00204           return min(industry->incoming_cargo_waiting[variable - 0x40] / industry->prod_level, (uint16)0xFFFF);
    00205         } else {
    00206           return min(industry->incoming_cargo_waiting[variable - 0x40], (uint16)0xFFFF);
    00207         }
    00208       } else {
    00209         return 0;
    00210       }
    00211     }
    00212
    00213     /* Manhattan distance of closes dry/water tile */
    00214     case 0x43: return GetClosestWaterDistance(tile, (indspec->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
    00215
    00216     /* Layout number */
    00217     case 0x44: return industry->selected_layout;
    00218
    00219     /* Company info */
    00220     case 0x45: {
    00221       byte colours;
    00222       bool is_ai = false;
    00223
    00224       const Company *c = Company::GetIfValid(industry->founder);
    00225       if (c != NULL) {
    00226         const Livery *l = &c->livery[LS_DEFAULT];
    00227
    00228         is_ai = c->is_ai;
    00229         colours = l->colour1 + l->colour2 * 16;
    00230       } else {
    00231         colours = GB(Random(), 0, 8);
    00232       }
    00233
    00234       return industry->founder | (is_ai ? 0x10000 : 0) | (colours << 24);
    00235     }
    00236
    00237     case 0x46: return industry->construction_date; // Date when built - long format - (in days)
    00238
    00239     /* Get industry ID at offset param */
    00240     case 0x60: return GetIndustryIDAtOffset(GetNearbyTile(parameter, industry->location.tile), industry, object->grffile->grfid);
    00241
    00242     /* Get random tile bits at offset param */
    00243     case 0x61:
    00244       tile = GetNearbyTile(parameter, tile);
    00245       return (IsTileType(tile, MP_INDUSTRY) && Industry::GetByTile(tile) == industry) ? GetIndustryRandomBits(tile) : 0;
    00246
    00247     /* Land info of nearby tiles */
    00248     case 0x62: return GetNearbyIndustryTileInformation(parameter, tile, INVALID_INDUSTRY);
    00249
    00250     /* Animation stage of nearby tiles */
    00251     case 0x63:
    00252       tile = GetNearbyTile(parameter, tile);
    00253       if (IsTileType(tile, MP_INDUSTRY) && Industry::GetByTile(tile) == industry) {
    00254         return GetIndustryAnimationState(tile);
    00255       }
    00256       return 0xFFFFFFFF;
    00257
    00258     /* Distance of nearest industry of given type */
    00259     case 0x64: return GetClosestIndustry(tile, MapNewGRFIndustryType(parameter, indspec->grf_prop.grffile->grfid), industry);
    00260     /* Get town zone and Manhattan distance of closest town */
    00261     case 0x65: return GetTownRadiusGroup(industry->town, tile) << 16 | min(DistanceManhattan(tile, industry->town->xy), 0xFFFF);
    00262     /* Get square of Euclidian distance of closes town */
    00263     case 0x66: return GetTownRadiusGroup(industry->town, tile) << 16 | min(DistanceSquare(tile, industry->town->xy), 0xFFFF);
    00264
    00265     /* Count of industry, distance of closest instance
    00266      * 68 is the same as 67, but with a filtering on selected layout */
    00267     case 0x67:
    00268     case 0x68: return GetCountAndDistanceOfClosestInstance(parameter, variable == 0x68 ? GB(GetRegister(0x101), 0, 8) : 0, industry);
    00269
    00270     /* Get a variable from the persistent storage */
    00271     case 0x7C: return industry->psa.Get(parameter);
    00272
    00273     /* Industry structure access*/
    00274     case 0x80: return industry->location.tile;
    00275     case 0x81: return GB(industry->location.tile, 8, 8);
    00276     /* Pointer to the town the industry is associated with */
    00277     case 0x82: return industry->town->index;
    00278     case 0x83:
    00279     case 0x84:
    00280     case 0x85: DEBUG(grf, 0, "NewGRFs shouldn't be doing pointer magic"); break; // not supported
    00281     case 0x86: return industry->location.w;
    00282     case 0x87: return industry->location.h;// xy dimensions
    00283
    00284     case 0x88:
    00285     case 0x89: return industry->produced_cargo[variable - 0x88];
    00286     case 0x8A: return industry->produced_cargo_waiting[0];
    00287     case 0x8B: return GB(industry->produced_cargo_waiting[0], 8, 8);
    00288     case 0x8C: return industry->produced_cargo_waiting[1];
    00289     case 0x8D: return GB(industry->produced_cargo_waiting[1], 8, 8);
    00290     case 0x8E:
    00291     case 0x8F: return industry->production_rate[variable - 0x8E];
    00292     case 0x90:
    00293     case 0x91:
    00294     case 0x92: return industry->accepts_cargo[variable - 0x90];
    00295     case 0x93: return industry->prod_level;
    00296     /* amount of cargo produced so far THIS month. */
    00297     case 0x94: return industry->this_month_production[0];
    00298     case 0x95: return GB(industry->this_month_production[0], 8, 8);
    00299     case 0x96: return industry->this_month_production[1];
    00300     case 0x97: return GB(industry->this_month_production[1], 8, 8);
    00301     /* amount of cargo transported so far THIS month. */
    00302     case 0x98: return industry->this_month_transported[0];
    00303     case 0x99: return GB(industry->this_month_transported[0], 8, 8);
    00304     case 0x9A: return industry->this_month_transported[1];
    00305     case 0x9B: return GB(industry->this_month_transported[1], 8, 8);
    00306     /* fraction of cargo transported LAST month. */
    00307     case 0x9C:
    00308     case 0x9D: return industry->last_month_pct_transported[variable - 0x9C];
    00309     /* amount of cargo produced LAST month. */
    00310     case 0x9E: return industry->last_month_production[0];
    00311     case 0x9F: return GB(industry->last_month_production[0], 8, 8);
    00312     case 0xA0: return industry->last_month_production[1];
    00313     case 0xA1: return GB(industry->last_month_production[1], 8, 8);
    00314     /* amount of cargo transported last month. */
    00315     case 0xA2: return industry->last_month_transported[0];
    00316     case 0xA3: return GB(industry->last_month_transported[0], 8, 8);
    00317     case 0xA4: return industry->last_month_transported[1];
    00318     case 0xA5: return GB(industry->last_month_transported[1], 8, 8);
    00319
    00320     case 0xA6: return industry->type;
    00321     case 0xA7: return industry->founder;
    00322     case 0xA8: return industry->random_colour;
    00323     case 0xA9: return Clamp(industry->last_prod_year - ORIGINAL_BASE_YEAR, 0, 255);
    00324     case 0xAA: return industry->counter;
    00325     case 0xAB: return GB(industry->counter, 8, 8);
    00326     case 0xAC: return industry->was_cargo_delivered;
    00327
    00328     case 0xB0: return Clamp(industry->construction_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Date when built since 1920 (in days)
    00329     case 0xB3: return industry->construction_type; // Construction type
    00330     case 0xB4: return Clamp(industry->last_cargo_accepted_at - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Date last cargo accepted since 1920 (in days)
    00331   }
    00332
    00333   DEBUG(grf, 1, "Unhandled industry property 0x%X", variable);
    00334
    00335   *available = false;
    00336   return UINT_MAX;
    00337 }
    00338
    00339 static const SpriteGroup *IndustryResolveReal(const ResolverObject *object, const RealSpriteGroup *group)
    00340 {
    00341   /* IndustryTile do not have 'real' groups */
    00342   return NULL;
    00343 }
    00344
    00345 static uint32 IndustryGetRandomBits(const ResolverObject *object)
    00346 {
    00347   return object->u.industry.ind == NULL ? 0 : object->u.industry.ind->random;
    00348 }
    00349
    00350 static uint32 IndustryGetTriggers(const ResolverObject *object)
    00351 {
    00352   return object->u.industry.ind == NULL ? 0 : object->u.industry.ind->random_triggers;
    00353 }
    00354
    00355 static void IndustrySetTriggers(const ResolverObject *object, int triggers)
    00356 {
    00357   if (object->u.industry.ind == NULL) return;
    00358   object->u.industry.ind->random_triggers = triggers;
    00359 }
    00360
    00361 static void NewIndustryResolver(ResolverObject *res, TileIndex tile, Industry *indus, IndustryType type)
    00362 {
    00363   res->GetRandomBits = IndustryGetRandomBits;
    00364   res->GetTriggers   = IndustryGetTriggers;
    00365   res->SetTriggers   = IndustrySetTriggers;
    00366   res->GetVariable   = IndustryGetVariable;
    00367   res->ResolveReal   = IndustryResolveReal;
    00368
    00369   res->psa             = &indus->psa;
    00370   res->u.industry.tile = tile;
    00371   res->u.industry.ind  = indus;
    00372   res->u.industry.gfx  = INVALID_INDUSTRYTILE;
    00373   res->u.industry.type = type;
    00374
    00375   res->callback        = CBID_NO_CALLBACK;
    00376   res->callback_param1 = 0;
    00377   res->callback_param2 = 0;
    00378   res->last_value      = 0;
    00379   res->trigger         = 0;
    00380   res->reseed          = 0;
    00381   res->count           = 0;
    00382
    00383   const IndustrySpec *indspec = GetIndustrySpec(type);
    00384   res->grffile         = (indspec != NULL ? indspec->grf_prop.grffile : NULL);
    00385 }
    00386
    00387 uint16 GetIndustryCallback(CallbackID callback, uint32 param1, uint32 param2, Industry *industry, IndustryType type, TileIndex tile)
    00388 {
    00389   ResolverObject object;
    00390   const SpriteGroup *group;
    00391
    00392   NewIndustryResolver(&object, tile, industry, type);
    00393   object.callback = callback;
    00394   object.callback_param1 = param1;
    00395   object.callback_param2 = param2;
    00396
    00397   group = SpriteGroup::Resolve(GetIndustrySpec(type)->grf_prop.spritegroup, &object);
    00398   if (group == NULL) return CALLBACK_FAILED;
    00399
    00400   return group->GetCallbackResult();
    00401 }
    00402
    00403 uint32 IndustryLocationGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
    00404 {
    00405   const Industry *industry = object->u.industry.ind;
    00406   TileIndex tile = object->u.industry.tile;
    00407
    00408   if (object->scope == VSG_SCOPE_PARENT) {
    00409     return TownGetVariable(variable, parameter, available, industry->town);
    00410   }
    00411
    00412   switch (variable) {
    00413     case 0x80: return tile;
    00414     case 0x81: return GB(tile, 8, 8);
    00415
    00416     /* Pointer to the town the industry is associated with */
    00417     case 0x82: return industry->town->index;
    00418     case 0x83:
    00419     case 0x84:
    00420     case 0x85: DEBUG(grf, 0, "NewGRFs shouldn't be doing pointer magic"); break; // not supported
    00421
    00422     /* Number of the layout */
    00423     case 0x86: return industry->selected_layout;
    00424
    00425     /* Ground type */
    00426     case 0x87: return GetTerrainType(tile);
    00427
    00428     /* Town zone */
    00429     case 0x88: return GetTownRadiusGroup(industry->town, tile);
    00430
    00431     /* Manhattan distance of the closest town */
    00432     case 0x89: return min(DistanceManhattan(industry->town->xy, tile), 255);
    00433
    00434     /* Lowest height of the tile */
    00435     case 0x8A: return GetTileZ(tile);
    00436
    00437     /* Distance to the nearest water/land tile */
    00438     case 0x8B: return GetClosestWaterDistance(tile, (GetIndustrySpec(industry->type)->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
    00439
    00440     /* Square of Euclidian distance from town */
    00441     case 0x8D: return min(DistanceSquare(industry->town->xy, tile), 65535);
    00442
    00443     /* 32 random bits */
    00444     case 0x8F: return _industry_creation_random_bits;
    00445   }
    00446
    00447   /* None of the special ones, so try the general ones */
    00448   return IndustryGetVariable(object, variable, parameter, available);
    00449 }
    00450
    00451 bool CheckIfCallBackAllowsCreation(TileIndex tile, IndustryType type, uint itspec_index, uint32 seed)
    00452 {
    00453   const IndustrySpec *indspec = GetIndustrySpec(type);
    00454
    00455   ResolverObject object;
    00456   const SpriteGroup *group;
    00457
    00458   Industry ind;
    00459   ind.index = INVALID_INDUSTRY;
    00460   ind.location.tile = tile;
    00461   ind.location.w = 0;
    00462   ind.type = type;
    00463   ind.selected_layout = itspec_index;
    00464   ind.town = ClosestTownFromTile(tile, UINT_MAX);
    00465
    00466   NewIndustryResolver(&object, tile, &ind, type);
    00467   object.GetVariable = IndustryLocationGetVariable;
    00468   object.callback = CBID_INDUSTRY_LOCATION;
    00469   _industry_creation_random_bits = seed;
    00470
    00471   group = SpriteGroup::Resolve(GetIndustrySpec(type)->grf_prop.spritegroup, &object);
    00472
    00473   /* Unlike the "normal" cases, not having a valid result means we allow
    00474    * the building of the industry, as that's how it's done in TTDP. */
    00475   if (group == NULL) return true;
    00476   uint16 result = group->GetCallbackResult();
    00477   if (result == 0x400 || result == CALLBACK_FAILED) return true;
    00478
    00479   /* Copy some parameters from the registers to the error message text ref. stack */
    00480   SwitchToErrorRefStack();
    00481   PrepareTextRefStackUsage(4);
    00482   SwitchToNormalRefStack();
    00483
    00484   switch (result) {
    00485     case 0x401: _error_message = STR_ERROR_SITE_UNSUITABLE; break;
    00486     case 0x402: _error_message = STR_ERROR_CAN_ONLY_BE_BUILT_IN_RAINFOREST; break;
    00487     case 0x403: _error_message = STR_ERROR_CAN_ONLY_BE_BUILT_IN_DESERT; break;
    00488     default: _error_message = GetGRFStringID(indspec->grf_prop.grffile->grfid, 0xD000 + result); break;
    00489   }
    00490
    00491   return false;
    00492 }
    00493
    00494 bool CheckIfCallBackAllowsAvailability(IndustryType type, IndustryAvailabilityCallType creation_type)
    00495 {
    00496   const IndustrySpec *indspec = GetIndustrySpec(type);
    00497
    00498   if (HasBit(indspec->callback_mask, CBM_IND_AVAILABLE)) {
    00499     uint16 res = GetIndustryCallback(CBID_INDUSTRY_AVAILABLE, 0, creation_type, NULL, type, INVALID_TILE);
    00500     if (res != CALLBACK_FAILED) {
    00501       return (res == 0);
    00502     }
    00503   }
    00504   return true;
    00505 }
    00506
    00507 static int32 DerefIndProd(int field, bool use_register)
    00508 {
    00509   return use_register ? (int32)GetRegister(field) : field;
    00510 }
    00511
    00517 void IndustryProductionCallback(Industry *ind, int reason)
    00518 {
    00519   const IndustrySpec *spec = GetIndustrySpec(ind->type);
    00520   ResolverObject object;
    00521   NewIndustryResolver(&object, ind->location.tile, ind, ind->type);
    00522   if ((spec->behaviour & INDUSTRYBEH_PRODCALLBACK_RANDOM) != 0) object.callback_param1 = Random();
    00523   int multiplier = 1;
    00524   if ((spec->behaviour & INDUSTRYBEH_PROD_MULTI_HNDLING) != 0) multiplier = ind->prod_level;
    00525   object.callback_param2 = reason;
    00526
    00527   for (uint loop = 0;; loop++) {
    00528     /* limit the number of calls to break infinite loops.
    00529      * 'loop' is provided as 16 bits to the newgrf, so abort when those are exceeded. */
    00530     if (loop >= 0x10000) {
    00531       /* display error message */
    00532       SetDParamStr(0, spec->grf_prop.grffile->filename);
    00533       SetDParam(1, spec->name);
    00534       ShowErrorMessage(STR_NEWGRF_BUGGY, STR_NEWGRF_BUGGY_ENDLESS_PRODUCTION_CALLBACK, 0, 0);
    00535
    00536       /* abort the function early, this error isn't critical and will allow the game to continue to run */
    00537       break;
    00538     }
    00539
    00540     SB(object.callback_param2, 8, 16, loop);
    00541     const SpriteGroup *tgroup = SpriteGroup::Resolve(spec->grf_prop.spritegroup, &object);
    00542     if (tgroup == NULL || tgroup->type != SGT_INDUSTRY_PRODUCTION) break;
    00543     const IndustryProductionSpriteGroup *group = (const IndustryProductionSpriteGroup *)tgroup;
    00544
    00545     bool deref = (group->version == 1);
    00546
    00547     for (uint i = 0; i < 3; i++) {
    00548       ind->incoming_cargo_waiting[i] = Clamp(ind->incoming_cargo_waiting[i] - DerefIndProd(group->subtract_input[i], deref) * multiplier, 0, 0xFFFF);
    00549     }
    00550     for (uint i = 0; i < 2; i++) {
    00551       ind->produced_cargo_waiting[i] = Clamp(ind->produced_cargo_waiting[i] + max(DerefIndProd(group->add_output[i], deref), 0) * multiplier, 0, 0xFFFF);
    00552     }
    00553
    00554     int32 again = DerefIndProd(group->again, deref);
    00555     if (again == 0) break;
    00556
    00557     SB(object.callback_param2, 24, 8, again);
    00558   }
    00559
    00560   SetWindowDirty(WC_INDUSTRY_VIEW, ind->index);
    00561 }