# newgrf_industries.cpp

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    00001 /* $Id: newgrf_industries.cpp 13871 2008-07-29 22:37:54Z rubidium $ */
    00002
    00005 #include "stdafx.h"
    00006 #include "openttd.h"
    00007 #include "debug.h"
    00008 #include "variables.h"
    00009 #include "landscape.h"
    00010 #include "industry.h"
    00011 #include "industry_map.h"
    00012 #include "newgrf.h"
    00013 #include "newgrf_callbacks.h"
    00014 #include "newgrf_spritegroup.h"
    00015 #include "newgrf_industries.h"
    00016 #include "newgrf_industrytiles.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 "player_func.h"
    00023 #include "player_base.h"
    00024 #include "command_func.h"
    00025
    00026 #include "table/strings.h"
    00027
    00028 static uint32 _industry_creation_random_bits;
    00029
    00030 /* Since the industry IDs defined by the GRF file don't necessarily correlate
    00031  * to those used by the game, the IDs used for overriding old industries must be
    00032  * translated when the idustry spec is set. */
    00033 IndustryOverrideManager _industry_mngr(NEW_INDUSTRYOFFSET, NUM_INDUSTRYTYPES, INVALID_INDUSTRYTYPE);
    00034 IndustryTileOverrideManager _industile_mngr(NEW_INDUSTRYTILEOFFSET, NUM_INDUSTRYTILES, INVALID_INDUSTRYTILE);
    00035
    00036 IndustryType MapNewGRFIndustryType(IndustryType grf_type, uint32 grf_id)
    00037 {
    00038   if (grf_type == IT_INVALID) return IT_INVALID;
    00039   if (!HasBit(grf_type, 7)) return GB(grf_type, 0, 6);
    00040
    00041   return _industry_mngr.GetID(GB(grf_type, 0, 6), grf_id);
    00042 }
    00043
    00044 static uint32 GetGRFParameter(IndustryType ind_id, byte parameter)
    00045 {
    00046   const IndustrySpec *indspec = GetIndustrySpec(ind_id);
    00047   const GRFFile *file = indspec->grf_prop.grffile;
    00048
    00049   if (parameter >= file->param_end) return 0;
    00050   return file->param[parameter];
    00051 }
    00052
    00059 static uint GetClosestWaterDistance(TileIndex tile, bool water)
    00060 {
    00061   TileIndex t;
    00062   int best_dist;
    00063   for (t = 0; t < MapSize(); t++) {
    00064     if (IsTileType(t, MP_WATER) == water) break;
    00065   }
    00066   if (t == MapSize() && !water) return 0x200;
    00067   best_dist = DistanceManhattan(tile, t);
    00068
    00069   for (; t < MapSize(); t++) {
    00070     int dist = DistanceManhattan(tile, t);
    00071     if (dist < best_dist) {
    00072       if (IsTileType(t, MP_WATER) == water) best_dist = dist;
    00073     } else {
    00074       /* When the Y distance between the current row and the 'source' tile
    00075        * is larger than the best distance, we've found the best distance */
    00076       if ((int)TileY(t) - (int)TileY(tile) > best_dist) break;
    00077       if ((int)TileX(t) - (int)TileX(tile) > best_dist) {
    00078         /* We can safely skip this many tiles; from here all tiles have a
    00079          * higher or equal distance than the best distance */
    00080         t |= MapMaxX();
    00081         continue;
    00082       } else if (TileX(tile) < TileX(t)) {
    00083         /* We can safely skip this many tiles; up to here all tiles have a
    00084          * higher or equal distance than the best distance */
    00085         t += max(best_dist - dist, 0);
    00086         continue;
    00087       }
    00088     }
    00089   }
    00090
    00091   return min(best_dist, water ? 0x7F : 0x1FF);
    00092 }
    00093
    00099 uint32 GetIndustryIDAtOffset(TileIndex tile, const Industry *i)
    00100 {
    00101   if (!IsTileType(tile, MP_INDUSTRY) || GetIndustryIndex(tile) != i->index) {
    00102     /* No industry and/or the tile does not have the same industry as the one we match it with */
    00103     return 0xFFFF;
    00104   }
    00105
    00106   IndustryGfx gfx = GetCleanIndustryGfx(tile);
    00107   const IndustryTileSpec *indtsp = GetIndustryTileSpec(gfx);
    00108   const IndustrySpec *indold = GetIndustrySpec(i->type);
    00109
    00110   if (gfx < NEW_INDUSTRYOFFSET) { // Does it belongs to an old type?
    00111     /* It is an old tile.  We have to see if it's been overriden */
    00112     if (indtsp->grf_prop.override == INVALID_INDUSTRYTILE) { // has it been overridden?
    00113       return 0xFF << 8 | gfx; // no. Tag FF + the gfx id of that tile
    00114     }
    00115     /* Not overriden */
    00116     const IndustryTileSpec *tile_ovr = GetIndustryTileSpec(indtsp->grf_prop.override);
    00117
    00118     if (tile_ovr->grf_prop.grffile->grfid == indold->grf_prop.grffile->grfid) {
    00119       return tile_ovr->grf_prop.local_id; // same grf file
    00120     } else {
    00121       return 0xFFFE; // not the same grf file
    00122     }
    00123   }
    00124   /* Not an 'old type' tile */
    00125   if (indtsp->grf_prop.spritegroup != NULL) { // tile has a spritegroup ?
    00126     if (indtsp->grf_prop.grffile->grfid == indold->grf_prop.grffile->grfid) { // same industry, same grf ?
    00127       return indtsp->grf_prop.local_id;
    00128     } else {
    00129       return 0xFFFE; // Defined in another grf file
    00130     }
    00131   }
    00132   /* The tile has no spritegroup */
    00133   return 0xFF << 8 | indtsp->grf_prop.subst_id; // so just give him the substitute
    00134 }
    00135
    00136 static uint32 GetClosestIndustry(TileIndex tile, IndustryType type, const Industry *current)
    00137 {
    00138   uint32 best_dist = MAX_UVALUE(uint32);
    00139   const Industry *i;
    00140   FOR_ALL_INDUSTRIES(i) {
    00141     if (i->type != type || i == current) continue;
    00142
    00143     best_dist = min(best_dist, DistanceManhattan(tile, i->xy));
    00144   }
    00145
    00146   return best_dist;
    00147 }
    00148
    00157 static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout_filter, const Industry *current)
    00158 {
    00159   uint32 GrfID = GetRegister(0x100);
    00160   IndustryType ind_index;
    00161   uint32 closest_dist = MAX_UVALUE(uint32);
    00162   byte count = 0;
    00163
    00164   /* Determine what will be the industry type to look for */
    00165   switch (GrfID) {
    00166     case 0:  // this is a default industry type
    00167       ind_index = param_setID;
    00168       break;
    00169
    00170     case 0xFFFFFFFF: // current grf
    00171       GrfID = GetIndustrySpec(current->type)->grf_prop.grffile->grfid;
    00172       /* Fall through */
    00173
    00174     default: //use the grfid specified in register 100h
    00175       SetBit(param_setID, 7); // bit 7 means it is not an old type
    00176       ind_index = MapNewGRFIndustryType(param_setID, GrfID);
    00177       break;
    00178   }
    00179
    00180   if (layout_filter == 0) {
    00181     /* If the filter is 0, it could be because none was specified as well as being really a 0.
    00182      * In either case, just do the regular var67 */
    00183     closest_dist = GetClosestIndustry(current->xy, ind_index, current);
    00184     count = GetIndustryTypeCount(ind_index);
    00185   } else {
    00186     /* Count only those who match the same industry type and layout filter
    00187      * Unfortunately, we have to do it manually */
    00188     const Industry *i;
    00189     FOR_ALL_INDUSTRIES(i) {
    00190       if (i->type == ind_index && i != current && i->selected_layout == layout_filter) {
    00191         closest_dist = min(closest_dist, DistanceManhattan(current->xy, i->xy));
    00192         count++;
    00193       }
    00194     }
    00195   }
    00196
    00197   return count << 16 | GB(closest_dist, 0, 16);
    00198 }
    00199
    00206 uint32 IndustryGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
    00207 {
    00208   const Industry *industry = object->u.industry.ind;
    00209   TileIndex tile = object->u.industry.tile;
    00210   IndustryType type = object->u.industry.type;
    00211   const IndustrySpec *indspec = GetIndustrySpec(type);
    00212
    00213   /* Shall the variable get resolved in parent scope and are we not yet in parent scope? */
    00214   if (object->u.industry.gfx == INVALID_INDUSTRYTILE && object->scope == VSG_SCOPE_PARENT) {
    00215     /* Pass the request on to the town of the industry */
    00216     const Town *t;
    00217
    00218     if (industry != NULL) {
    00219       t = industry->town;
    00220     } else if (tile != INVALID_TILE) {
    00221       t = ClosestTownFromTile(tile, UINT_MAX);
    00222     } else {
    00223       *available = false;
    00224       return UINT_MAX;
    00225     }
    00226
    00227     return TownGetVariable(variable, parameter, available, t);
    00228   }
    00229
    00230   if (industry == NULL) {
    00231     /* industry does not exist, only use those variables that are "safe" */
    00232     switch (variable) {
    00233       /* Read GRF parameter */
    00234       case 0x7F: return GetGRFParameter(type, parameter);
    00235       /* Manhattan distance of closes dry/water tile */
    00236       case 0x43: return GetClosestWaterDistance(tile, (indspec->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
    00237     }
    00238
    00239     DEBUG(grf, 1, "Unhandled property 0x%X (no available industry) in callback 0x%x", variable, object->callback);
    00240
    00241     *available = false;
    00242     return UINT_MAX;
    00243   }
    00244
    00245   switch (variable) {
    00246     case 0x40:
    00247     case 0x41:
    00248     case 0x42: { // waiting cargo, but only if those two callback flags are set
    00249       uint16 callback = indspec->callback_flags;
    00250       if (HasBit(callback, CBM_IND_PRODUCTION_CARGO_ARRIVAL) || HasBit(callback, CBM_IND_PRODUCTION_256_TICKS)) {
    00251         if ((indspec->behaviour & INDUSTRYBEH_PROD_MULTI_HNDLING) != 0) {
    00252           return min(industry->incoming_cargo_waiting[variable - 0x40] / industry->prod_level, (uint16)0xFFFF);
    00253         } else {
    00254           return min(industry->incoming_cargo_waiting[variable - 0x40], (uint16)0xFFFF);
    00255         }
    00256       } else {
    00257         return 0;
    00258       }
    00259     }
    00260
    00261     /* Manhattan distance of closes dry/water tile */
    00262     case 0x43: return GetClosestWaterDistance(tile, (indspec->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
    00263
    00264     /* Layout number */
    00265     case 0x44: return industry->selected_layout;
    00266
    00267     /* player info */
    00268     case 0x45: {
    00269       byte colours;
    00270       bool is_ai = false;
    00271
    00272       if (IsValidPlayer(industry->founder)) {
    00273         const Player *p = GetPlayer(industry->founder);
    00274         const Livery *l = &p->livery[LS_DEFAULT];
    00275
    00276         is_ai = p->is_ai;
    00277         colours = l->colour1 + l->colour2 * 16;
    00278       } else {
    00279         colours = GB(Random(), 0, 8);
    00280       }
    00281
    00282       return industry->founder | (is_ai ? 0x10000 : 0) | (colours << 24);
    00283     }
    00284
    00285     /* Get industry ID at offset param */
    00286     case 0x60: return GetIndustryIDAtOffset(GetNearbyTile(parameter, industry->xy), industry);
    00287
    00288     /* Get random tile bits at offset param */
    00289     case 0x61:
    00290       tile = GetNearbyTile(parameter, tile);
    00291       return (IsTileType(tile, MP_INDUSTRY) && GetIndustryByTile(tile) == industry) ? GetIndustryRandomBits(tile) : 0;
    00292
    00293     /* Land info of nearby tiles */
    00294     case 0x62: return GetNearbyIndustryTileInformation(parameter, tile, INVALID_INDUSTRY);
    00295
    00296     /* Animation stage of nearby tiles */
    00297     case 0x63:
    00298       tile = GetNearbyTile(parameter, tile);
    00299       if (IsTileType(tile, MP_INDUSTRY) && GetIndustryByTile(tile) == industry) {
    00300         return GetIndustryAnimationState(tile);
    00301       }
    00302       return 0xFFFFFFFF;
    00303
    00304     /* Distance of nearest industry of given type */
    00305     case 0x64: return GetClosestIndustry(tile, MapNewGRFIndustryType(parameter, indspec->grf_prop.grffile->grfid), industry);
    00306     /* Get town zone and Manhattan distance of closest town */
    00307     case 0x65: return GetTownRadiusGroup(industry->town, tile) << 16 | min(DistanceManhattan(tile, industry->town->xy), 0xFFFF);
    00308     /* Get square of Euclidian distance of closes town */
    00309     case 0x66: return GetTownRadiusGroup(industry->town, tile) << 16 | min(DistanceSquare(tile, industry->town->xy), 0xFFFF);
    00310
    00311     /* Count of industry, distance of closest instance
    00312      * 68 is the same as 67, but with a filtering on selected layout */
    00313     case 0x67:
    00314     case 0x68: return GetCountAndDistanceOfClosestInstance(parameter, variable == 0x68 ? GB(GetRegister(0x101), 0, 8) : 0, industry);
    00315
    00316     /* Get a variable from the persistent storage */
    00317     case 0x7C: return industry->psa.Get(parameter);
    00318
    00319     /* Read GRF parameter */
    00320     case 0x7F: return GetGRFParameter(type, parameter);
    00321
    00322     /* Industry structure access*/
    00323     case 0x80: return industry->xy;
    00324     case 0x81: return GB(industry->xy, 8, 8);
    00325     /* Pointer to the town the industry is associated with */
    00326     case 0x82: return industry->town->index;
    00327     case 0x83:
    00328     case 0x84:
    00329     case 0x85: DEBUG(grf, 0, "NewGRFs shouldn't be doing pointer magic"); break; // not supported
    00330     case 0x86: return industry->width;
    00331     case 0x87: return industry->height;// xy dimensions
    00332     /*  */
    00333     case 0x88:
    00334     case 0x89: return industry->produced_cargo[variable - 0x88];
    00335     case 0x8A: return industry->produced_cargo_waiting[0];
    00336     case 0x8B: return GB(industry->produced_cargo_waiting[0], 8, 8);
    00337     case 0x8C: return industry->produced_cargo_waiting[1];
    00338     case 0x8D: return GB(industry->produced_cargo_waiting[1], 8, 8);
    00339     case 0x8E:
    00340     case 0x8F: return industry->production_rate[variable - 0x8E];
    00341     case 0x90:
    00342     case 0x91:
    00343     case 0x92: return industry->accepts_cargo[variable - 0x90];
    00344     case 0x93: return industry->prod_level;
    00345     /* amount of cargo produced so far THIS month. */
    00346     case 0x94: return industry->this_month_production[0];
    00347     case 0x95: return GB(industry->this_month_production[0], 8, 8);
    00348     case 0x96: return industry->this_month_production[1];
    00349     case 0x97: return GB(industry->this_month_production[1], 8, 8);
    00350     /* amount of cargo transported so far THIS month. */
    00351     case 0x98: return industry->this_month_transported[0];
    00352     case 0x99: return GB(industry->this_month_transported[0], 8, 8);
    00353     case 0x9A: return industry->this_month_transported[1];
    00354     case 0x9B: return GB(industry->this_month_transported[0], 8, 8);
    00355     /* fraction of cargo transported LAST month. */
    00356     case 0x9C:
    00357     case 0x9D: return industry->last_month_pct_transported[variable - 0x9C];
    00358     /* amount of cargo produced LAST month. */
    00359     case 0x9E: return industry->last_month_production[0];
    00360     case 0x9F: return GB(industry->last_month_production[0], 8, 8);
    00361     case 0xA0: return industry->last_month_production[1];
    00362     case 0xA1: return GB(industry->last_month_production[1], 8, 8);
    00363     /* amount of cargo transported last month. */
    00364     case 0xA2: return industry->last_month_transported[0];
    00365     case 0xA3: return GB(industry->last_month_transported[0], 8, 8);
    00366     case 0xA4: return industry->last_month_transported[1];
    00367     case 0xA5: return GB(industry->last_month_transported[0], 8, 8);
    00368
    00369     case 0xA6: return industry->type;
    00370     case 0xA7: return industry->founder;
    00371     case 0xA8: return industry->random_color;
    00372     case 0xA9: return Clamp(industry->last_prod_year - ORIGINAL_BASE_YEAR, 0, 255);
    00373     case 0xAA: return industry->counter;
    00374     case 0xAB: return GB(industry->counter, 8, 8);
    00375     case 0xAC: return industry->was_cargo_delivered;
    00376
    00377     case 0xB0: return Clamp(industry->construction_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Date when built since 1920 (in days)
    00378     case 0xB3: return industry->construction_type; // Construction type
    00379     case 0xB4: return Clamp(industry->last_cargo_accepted_at - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Date last cargo accepted since 1920 (in days)
    00380   }
    00381
    00382   DEBUG(grf, 1, "Unhandled industry property 0x%X", variable);
    00383
    00384   *available = false;
    00385   return (uint32)-1;
    00386 }
    00387
    00388 static const SpriteGroup *IndustryResolveReal(const ResolverObject *object, const SpriteGroup *group)
    00389 {
    00390   /* IndustryTile do not have 'real' groups */
    00391   return NULL;
    00392 }
    00393
    00394 static uint32 IndustryGetRandomBits(const ResolverObject *object)
    00395 {
    00396   return object->u.industry.ind == NULL ? 0 : object->u.industry.ind->random;
    00397 }
    00398
    00399 static uint32 IndustryGetTriggers(const ResolverObject *object)
    00400 {
    00401   return object->u.industry.ind == NULL ? 0 : object->u.industry.ind->random_triggers;
    00402 }
    00403
    00404 static void IndustrySetTriggers(const ResolverObject *object, int triggers)
    00405 {
    00406   if (object->u.industry.ind == NULL) return;
    00407   object->u.industry.ind->random_triggers = triggers;
    00408 }
    00409
    00410 static void NewIndustryResolver(ResolverObject *res, TileIndex tile, Industry *indus, IndustryType type)
    00411 {
    00412   res->GetRandomBits = IndustryGetRandomBits;
    00413   res->GetTriggers   = IndustryGetTriggers;
    00414   res->SetTriggers   = IndustrySetTriggers;
    00415   res->GetVariable   = IndustryGetVariable;
    00416   res->ResolveReal   = IndustryResolveReal;
    00417
    00418   res->psa             = &indus->psa;
    00419   res->u.industry.tile = tile;
    00420   res->u.industry.ind  = indus;
    00421   res->u.industry.gfx  = INVALID_INDUSTRYTILE;
    00422   res->u.industry.type = type;
    00423
    00424   res->callback        = CBID_NO_CALLBACK;
    00425   res->callback_param1 = 0;
    00426   res->callback_param2 = 0;
    00427   res->last_value      = 0;
    00428   res->trigger         = 0;
    00429   res->reseed          = 0;
    00430 }
    00431
    00432 uint16 GetIndustryCallback(CallbackID callback, uint32 param1, uint32 param2, Industry *industry, IndustryType type, TileIndex tile)
    00433 {
    00434   ResolverObject object;
    00435   const SpriteGroup *group;
    00436
    00437   NewIndustryResolver(&object, tile, industry, type);
    00438   object.callback = callback;
    00439   object.callback_param1 = param1;
    00440   object.callback_param2 = param2;
    00441
    00442   group = Resolve(GetIndustrySpec(type)->grf_prop.spritegroup, &object);
    00443   if (group == NULL || group->type != SGT_CALLBACK) return CALLBACK_FAILED;
    00444
    00445   return group->g.callback.result;
    00446 }
    00447
    00448 uint32 IndustryLocationGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
    00449 {
    00450   const Industry *industry = object->u.industry.ind;
    00451   TileIndex tile = object->u.industry.tile;
    00452
    00453   if (object->scope == VSG_SCOPE_PARENT) {
    00454     return TownGetVariable(variable, parameter, available, industry->town);
    00455   }
    00456
    00457   switch (variable) {
    00458     case 0x80: return tile;
    00459     case 0x81: return GB(tile, 8, 8);
    00460
    00461     /* Pointer to the town the industry is associated with */
    00462     case 0x82: return industry->town->index;
    00463     case 0x83:
    00464     case 0x84:
    00465     case 0x85: DEBUG(grf, 0, "NewGRFs shouldn't be doing pointer magic"); break; // not supported
    00466
    00467     /* Number of the layout */
    00468     case 0x86: return industry->selected_layout;
    00469
    00470     /* Ground type */
    00471     case 0x87: return GetTerrainType(tile);
    00472
    00473     /* Town zone */
    00474     case 0x88: return GetTownRadiusGroup(industry->town, tile);
    00475
    00476     /* Manhattan distance of the closest town */
    00477     case 0x89: return min(DistanceManhattan(industry->town->xy, tile), 255);
    00478
    00479     /* Lowest height of the tile */
    00480     case 0x8A: return GetTileZ(tile);
    00481
    00482     /* Distance to the nearest water/land tile */
    00483     case 0x8B: return GetClosestWaterDistance(tile, (GetIndustrySpec(industry->type)->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
    00484
    00485     /* Square of Euclidian distance from town */
    00486     case 0x8D: return min(DistanceSquare(industry->town->xy, tile), 65535);
    00487
    00488     /* 32 random bits */
    00489     case 0x8F: return _industry_creation_random_bits;
    00490   }
    00491
    00492   /* None of the special ones, so try the general ones */
    00493   return IndustryGetVariable(object, variable, parameter, available);
    00494 }
    00495
    00496 bool CheckIfCallBackAllowsCreation(TileIndex tile, IndustryType type, uint itspec_index, uint32 seed)
    00497 {
    00498   const IndustrySpec *indspec = GetIndustrySpec(type);
    00499
    00500   ResolverObject object;
    00501   const SpriteGroup *group;
    00502
    00503   Industry ind;
    00504   ind.index = INVALID_INDUSTRY;
    00505   ind.xy = tile;
    00506   ind.width = 0;
    00507   ind.type = type;
    00508   ind.selected_layout = itspec_index;
    00509   ind.town = ClosestTownFromTile(tile, (uint)-1);
    00510
    00511   NewIndustryResolver(&object, tile, &ind, type);
    00512   object.GetVariable = IndustryLocationGetVariable;
    00513   object.callback = CBID_INDUSTRY_LOCATION;
    00514   _industry_creation_random_bits = seed;
    00515
    00516   group = Resolve(GetIndustrySpec(type)->grf_prop.spritegroup, &object);
    00517
    00518   /* Unlike the "normal" cases, not having a valid result means we allow
    00519    * the building of the industry, as that's how it's done in TTDP. */
    00520   if (group == NULL || group->type != SGT_CALLBACK) return true;
    00521
    00522   /* Copy some parameters from the registers to the error message text ref. stack */
    00523   SwitchToErrorRefStack();
    00524   PrepareTextRefStackUsage(4);
    00525   SwitchToNormalRefStack();
    00526
    00527   switch (group->g.callback.result) {
    00528     case 0x400: return true;
    00529     case 0x401: _error_message = STR_0239_SITE_UNSUITABLE; break;
    00530     case 0x402: _error_message = STR_0317_CAN_ONLY_BE_BUILT_IN_RAINFOREST; break;
    00531     case 0x403: _error_message = STR_0318_CAN_ONLY_BE_BUILT_IN_DESERT; break;
    00532     default: _error_message = GetGRFStringID(indspec->grf_prop.grffile->grfid, 0xD000 + group->g.callback.result); break;
    00533   }
    00534
    00535   return false;
    00536 }
    00537
    00538 bool CheckIfCallBackAllowsAvailability(IndustryType type, IndustryAvailabilityCallType creation_type)
    00539 {
    00540   const IndustrySpec *indspec = GetIndustrySpec(type);
    00541
    00542   if (HasBit(indspec->callback_flags, CBM_IND_AVAILABLE)) {
    00543     uint16 res = GetIndustryCallback(CBID_INDUSTRY_AVAILABLE, 0, creation_type, NULL, type, INVALID_TILE);
    00544     if (res != CALLBACK_FAILED) {
    00545       return (res == 0);
    00546     }
    00547   }
    00548   return true;
    00549 }
    00550
    00551 static int32 DerefIndProd(uint field, bool use_register)
    00552 {
    00553   return use_register ? (int32)GetRegister(field) : field;
    00554 }
    00555
    00561 void IndustryProductionCallback(Industry *ind, int reason)
    00562 {
    00563   const IndustrySpec *spec = GetIndustrySpec(ind->type);
    00564   ResolverObject object;
    00565   NewIndustryResolver(&object, ind->xy, ind, ind->type);
    00566   if ((spec->behaviour & INDUSTRYBEH_PRODCALLBACK_RANDOM) != 0) object.callback_param1 = Random();
    00567   int multiplier = 1;
    00568   if ((spec->behaviour & INDUSTRYBEH_PROD_MULTI_HNDLING) != 0) multiplier = ind->prod_level;
    00569   object.callback_param2 = reason;
    00570
    00571   for (uint loop = 0;; loop++) {
    00572     SB(object.callback_param2, 8, 16, loop);
    00573     const SpriteGroup *group = Resolve(spec->grf_prop.spritegroup, &object);
    00574     if (group == NULL || group->type != SGT_INDUSTRY_PRODUCTION) break;
    00575
    00576     bool deref = (group->g.indprod.version == 1);
    00577
    00578     for (uint i = 0; i < 3; i++) {
    00579       ind->incoming_cargo_waiting[i] = Clamp(ind->incoming_cargo_waiting[i] - DerefIndProd(group->g.indprod.substract_input[i], deref) * multiplier, 0, 0xFFFF);
    00580     }
    00581     for (uint i = 0; i < 2; i++) {
    00582       ind->produced_cargo_waiting[i] = Clamp(ind->produced_cargo_waiting[i] + max(DerefIndProd(group->g.indprod.add_output[i], deref), 0) * multiplier, 0, 0xFFFF);
    00583     }
    00584
    00585     int32 again = DerefIndProd(group->g.indprod.again, deref);
    00586     if (again == 0) break;
    00587
    00588     SB(object.callback_param2, 24, 8, again);
    00589   }
    00590
    00591   InvalidateWindow(WC_INDUSTRY_VIEW, ind->index);
    00592 }