# newgrf_industries.cpp

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    00001 /* $Id: newgrf_industries.cpp 15428 2009-02-09 02:57:15Z rubidium $ */
    00002
    00005 #include "stdafx.h"
    00006 #include "debug.h"
    00007 #include "tile_type.h"
    00008 #include "strings_type.h"
    00009 #include "company_type.h"
    00010 #include "industry_map.h"
    00011 #include "newgrf.h"
    00012 #include "newgrf_industries.h"
    00013 #include "newgrf_commons.h"
    00014 #include "newgrf_text.h"
    00015 #include "newgrf_town.h"
    00016 #include "window_func.h"
    00017 #include "town.h"
    00018 #include "company_base.h"
    00019 #include "command_func.h"
    00020
    00021 #include "table/strings.h"
    00022
    00023 static uint32 _industry_creation_random_bits;
    00024
    00025 /* Since the industry IDs defined by the GRF file don't necessarily correlate
    00026  * to those used by the game, the IDs used for overriding old industries must be
    00027  * translated when the idustry spec is set. */
    00028 IndustryOverrideManager _industry_mngr(NEW_INDUSTRYOFFSET, NUM_INDUSTRYTYPES, INVALID_INDUSTRYTYPE);
    00029 IndustryTileOverrideManager _industile_mngr(NEW_INDUSTRYTILEOFFSET, NUM_INDUSTRYTILES, INVALID_INDUSTRYTILE);
    00030
    00031 IndustryType MapNewGRFIndustryType(IndustryType grf_type, uint32 grf_id)
    00032 {
    00033   if (grf_type == IT_INVALID) return IT_INVALID;
    00034   if (!HasBit(grf_type, 7)) return GB(grf_type, 0, 6);
    00035
    00036   return _industry_mngr.GetID(GB(grf_type, 0, 6), grf_id);
    00037 }
    00038
    00046 static uint GetClosestWaterDistance(TileIndex tile, bool water)
    00047 {
    00048   if (IsTileType(tile, MP_WATER) == water) return 0;
    00049
    00050   uint max_dist = water ? 0x7F : 0x200;
    00051
    00052   int x = TileX(tile);
    00053   int y = TileY(tile);
    00054
    00055   uint max_x = MapMaxX();
    00056   uint max_y = MapMaxY();
    00057   uint min_xy = _settings_game.construction.freeform_edges ? 1 : 0;
    00058
    00059   /* go in a 'spiral' with increasing manhattan distance in each iteration */
    00060   for (uint dist = 1; dist < max_dist; dist++) {
    00061     /* next 'diameter' */
    00062     y--;
    00063
    00064     /* going counter-clockwise around this square */
    00065     for (DiagDirection dir = DIAGDIR_BEGIN; dir < DIAGDIR_END; dir++) {
    00066       static const int8 ddx[DIAGDIR_END] = { -1,  1,  1, -1};
    00067       static const int8 ddy[DIAGDIR_END] = {  1,  1, -1, -1};
    00068
    00069       int dx = ddx[dir];
    00070       int dy = ddy[dir];
    00071
    00072       /* each side of this square has length 'dist' */
    00073       for (uint a = 0; a < dist; a++) {
    00074         /* MP_VOID tiles are not checked (interval is [min; max) for IsInsideMM())*/
    00075         if (IsInsideMM(x, min_xy, max_x) && IsInsideMM(y, min_xy, max_y)) {
    00076           TileIndex t = TileXY(x, y);
    00077           if (IsTileType(t, MP_WATER) == water) return dist;
    00078         }
    00079         x += dx;
    00080         y += dy;
    00081       }
    00082     }
    00083   }
    00084
    00085   if (!water) {
    00086     /* no land found - is this a water-only map? */
    00087     for (TileIndex t = 0; t < MapSize(); t++) {
    00088       if (!IsTileType(t, MP_VOID) && !IsTileType(t, MP_WATER)) return 0x1FF;
    00089     }
    00090   }
    00091
    00092   return max_dist;
    00093 }
    00094
    00100 uint32 GetIndustryIDAtOffset(TileIndex tile, const Industry *i)
    00101 {
    00102   if (!IsTileType(tile, MP_INDUSTRY) || GetIndustryIndex(tile) != i->index) {
    00103     /* No industry and/or the tile does not have the same industry as the one we match it with */
    00104     return 0xFFFF;
    00105   }
    00106
    00107   IndustryGfx gfx = GetCleanIndustryGfx(tile);
    00108   const IndustryTileSpec *indtsp = GetIndustryTileSpec(gfx);
    00109   const IndustrySpec *indold = GetIndustrySpec(i->type);
    00110
    00111   if (gfx < NEW_INDUSTRYOFFSET) { // Does it belongs to an old type?
    00112     /* It is an old tile.  We have to see if it's been overriden */
    00113     if (indtsp->grf_prop.override == INVALID_INDUSTRYTILE) { // has it been overridden?
    00114       return 0xFF << 8 | gfx; // no. Tag FF + the gfx id of that tile
    00115     }
    00116     /* Not overriden */
    00117     const IndustryTileSpec *tile_ovr = GetIndustryTileSpec(indtsp->grf_prop.override);
    00118
    00119     if (tile_ovr->grf_prop.grffile->grfid == indold->grf_prop.grffile->grfid) {
    00120       return tile_ovr->grf_prop.local_id; // same grf file
    00121     } else {
    00122       return 0xFFFE; // not the same grf file
    00123     }
    00124   }
    00125   /* Not an 'old type' tile */
    00126   if (indtsp->grf_prop.spritegroup != NULL) { // tile has a spritegroup ?
    00127     if (indtsp->grf_prop.grffile->grfid == indold->grf_prop.grffile->grfid) { // same industry, same grf ?
    00128       return indtsp->grf_prop.local_id;
    00129     } else {
    00130       return 0xFFFE; // Defined in another grf file
    00131     }
    00132   }
    00133   /* The tile has no spritegroup */
    00134   return 0xFF << 8 | indtsp->grf_prop.subst_id; // so just give him the substitute
    00135 }
    00136
    00137 static uint32 GetClosestIndustry(TileIndex tile, IndustryType type, const Industry *current)
    00138 {
    00139   uint32 best_dist = UINT32_MAX;
    00140   const Industry *i;
    00141   FOR_ALL_INDUSTRIES(i) {
    00142     if (i->type != type || i == current) continue;
    00143
    00144     best_dist = min(best_dist, DistanceManhattan(tile, i->xy));
    00145   }
    00146
    00147   return best_dist;
    00148 }
    00149
    00158 static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout_filter, const Industry *current)
    00159 {
    00160   uint32 GrfID = GetRegister(0x100);
    00161   IndustryType ind_index;
    00162   uint32 closest_dist = UINT32_MAX;
    00163   byte count = 0;
    00164
    00165   /* Determine what will be the industry type to look for */
    00166   switch (GrfID) {
    00167     case 0:  // this is a default industry type
    00168       ind_index = param_setID;
    00169       break;
    00170
    00171     case 0xFFFFFFFF: // current grf
    00172       GrfID = GetIndustrySpec(current->type)->grf_prop.grffile->grfid;
    00173       /* Fall through */
    00174
    00175     default: //use the grfid specified in register 100h
    00176       SetBit(param_setID, 7); // bit 7 means it is not an old type
    00177       ind_index = MapNewGRFIndustryType(param_setID, GrfID);
    00178       break;
    00179   }
    00180
    00181   if (layout_filter == 0) {
    00182     /* If the filter is 0, it could be because none was specified as well as being really a 0.
    00183      * In either case, just do the regular var67 */
    00184     closest_dist = GetClosestIndustry(current->xy, ind_index, current);
    00185     count = GetIndustryTypeCount(ind_index);
    00186   } else {
    00187     /* Count only those who match the same industry type and layout filter
    00188      * Unfortunately, we have to do it manually */
    00189     const Industry *i;
    00190     FOR_ALL_INDUSTRIES(i) {
    00191       if (i->type == ind_index && i != current && i->selected_layout == layout_filter) {
    00192         closest_dist = min(closest_dist, DistanceManhattan(current->xy, i->xy));
    00193         count++;
    00194       }
    00195     }
    00196   }
    00197
    00198   return count << 16 | GB(closest_dist, 0, 16);
    00199 }
    00200
    00207 uint32 IndustryGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
    00208 {
    00209   const Industry *industry = object->u.industry.ind;
    00210   TileIndex tile = object->u.industry.tile;
    00211   IndustryType type = object->u.industry.type;
    00212   const IndustrySpec *indspec = GetIndustrySpec(type);
    00213
    00214   /* Shall the variable get resolved in parent scope and are we not yet in parent scope? */
    00215   if (object->u.industry.gfx == INVALID_INDUSTRYTILE && object->scope == VSG_SCOPE_PARENT) {
    00216     /* Pass the request on to the town of the industry */
    00217     const Town *t;
    00218
    00219     if (industry != NULL) {
    00220       t = industry->town;
    00221     } else if (tile != INVALID_TILE) {
    00222       t = ClosestTownFromTile(tile, UINT_MAX);
    00223     } else {
    00224       *available = false;
    00225       return UINT_MAX;
    00226     }
    00227
    00228     return TownGetVariable(variable, parameter, available, t);
    00229   }
    00230
    00231   if (industry == NULL) {
    00232     /* industry does not exist, only use those variables that are "safe" */
    00233     switch (variable) {
    00234       /* Manhattan distance of closes dry/water tile */
    00235       case 0x43: return GetClosestWaterDistance(tile, (indspec->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
    00236     }
    00237
    00238     DEBUG(grf, 1, "Unhandled property 0x%X (no available industry) in callback 0x%x", variable, object->callback);
    00239
    00240     *available = false;
    00241     return UINT_MAX;
    00242   }
    00243
    00244   switch (variable) {
    00245     case 0x40:
    00246     case 0x41:
    00247     case 0x42: { // waiting cargo, but only if those two callback flags are set
    00248       uint16 callback = indspec->callback_flags;
    00249       if (HasBit(callback, CBM_IND_PRODUCTION_CARGO_ARRIVAL) || HasBit(callback, CBM_IND_PRODUCTION_256_TICKS)) {
    00250         if ((indspec->behaviour & INDUSTRYBEH_PROD_MULTI_HNDLING) != 0) {
    00251           return min(industry->incoming_cargo_waiting[variable - 0x40] / industry->prod_level, (uint16)0xFFFF);
    00252         } else {
    00253           return min(industry->incoming_cargo_waiting[variable - 0x40], (uint16)0xFFFF);
    00254         }
    00255       } else {
    00256         return 0;
    00257       }
    00258     }
    00259
    00260     /* Manhattan distance of closes dry/water tile */
    00261     case 0x43: return GetClosestWaterDistance(tile, (indspec->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
    00262
    00263     /* Layout number */
    00264     case 0x44: return industry->selected_layout;
    00265
    00266     /* Company info */
    00267     case 0x45: {
    00268       byte colours;
    00269       bool is_ai = false;
    00270
    00271       if (IsValidCompanyID(industry->founder)) {
    00272         const Company *c = GetCompany(industry->founder);
    00273         const Livery *l = &c->livery[LS_DEFAULT];
    00274
    00275         is_ai = c->is_ai;
    00276         colours = l->colour1 + l->colour2 * 16;
    00277       } else {
    00278         colours = GB(Random(), 0, 8);
    00279       }
    00280
    00281       return industry->founder | (is_ai ? 0x10000 : 0) | (colours << 24);
    00282     }
    00283
    00284     case 0x46: return industry->construction_date; // Date when built - long format - (in days)
    00285
    00286     /* Get industry ID at offset param */
    00287     case 0x60: return GetIndustryIDAtOffset(GetNearbyTile(parameter, industry->xy), industry);
    00288
    00289     /* Get random tile bits at offset param */
    00290     case 0x61:
    00291       tile = GetNearbyTile(parameter, tile);
    00292       return (IsTileType(tile, MP_INDUSTRY) && GetIndustryByTile(tile) == industry) ? GetIndustryRandomBits(tile) : 0;
    00293
    00294     /* Land info of nearby tiles */
    00295     case 0x62: return GetNearbyIndustryTileInformation(parameter, tile, INVALID_INDUSTRY);
    00296
    00297     /* Animation stage of nearby tiles */
    00298     case 0x63:
    00299       tile = GetNearbyTile(parameter, tile);
    00300       if (IsTileType(tile, MP_INDUSTRY) && GetIndustryByTile(tile) == industry) {
    00301         return GetIndustryAnimationState(tile);
    00302       }
    00303       return 0xFFFFFFFF;
    00304
    00305     /* Distance of nearest industry of given type */
    00306     case 0x64: return GetClosestIndustry(tile, MapNewGRFIndustryType(parameter, indspec->grf_prop.grffile->grfid), industry);
    00307     /* Get town zone and Manhattan distance of closest town */
    00308     case 0x65: return GetTownRadiusGroup(industry->town, tile) << 16 | min(DistanceManhattan(tile, industry->town->xy), 0xFFFF);
    00309     /* Get square of Euclidian distance of closes town */
    00310     case 0x66: return GetTownRadiusGroup(industry->town, tile) << 16 | min(DistanceSquare(tile, industry->town->xy), 0xFFFF);
    00311
    00312     /* Count of industry, distance of closest instance
    00313      * 68 is the same as 67, but with a filtering on selected layout */
    00314     case 0x67:
    00315     case 0x68: return GetCountAndDistanceOfClosestInstance(parameter, variable == 0x68 ? GB(GetRegister(0x101), 0, 8) : 0, industry);
    00316
    00317     /* Get a variable from the persistent storage */
    00318     case 0x7C: return industry->psa.Get(parameter);
    00319
    00320     /* Industry structure access*/
    00321     case 0x80: return industry->xy;
    00322     case 0x81: return GB(industry->xy, 8, 8);
    00323     /* Pointer to the town the industry is associated with */
    00324     case 0x82: return industry->town->index;
    00325     case 0x83:
    00326     case 0x84:
    00327     case 0x85: DEBUG(grf, 0, "NewGRFs shouldn't be doing pointer magic"); break; // not supported
    00328     case 0x86: return industry->width;
    00329     case 0x87: return industry->height;// xy dimensions
    00330     /*  */
    00331     case 0x88:
    00332     case 0x89: return industry->produced_cargo[variable - 0x88];
    00333     case 0x8A: return industry->produced_cargo_waiting[0];
    00334     case 0x8B: return GB(industry->produced_cargo_waiting[0], 8, 8);
    00335     case 0x8C: return industry->produced_cargo_waiting[1];
    00336     case 0x8D: return GB(industry->produced_cargo_waiting[1], 8, 8);
    00337     case 0x8E:
    00338     case 0x8F: return industry->production_rate[variable - 0x8E];
    00339     case 0x90:
    00340     case 0x91:
    00341     case 0x92: return industry->accepts_cargo[variable - 0x90];
    00342     case 0x93: return industry->prod_level;
    00343     /* amount of cargo produced so far THIS month. */
    00344     case 0x94: return industry->this_month_production[0];
    00345     case 0x95: return GB(industry->this_month_production[0], 8, 8);
    00346     case 0x96: return industry->this_month_production[1];
    00347     case 0x97: return GB(industry->this_month_production[1], 8, 8);
    00348     /* amount of cargo transported so far THIS month. */
    00349     case 0x98: return industry->this_month_transported[0];
    00350     case 0x99: return GB(industry->this_month_transported[0], 8, 8);
    00351     case 0x9A: return industry->this_month_transported[1];
    00352     case 0x9B: return GB(industry->this_month_transported[0], 8, 8);
    00353     /* fraction of cargo transported LAST month. */
    00354     case 0x9C:
    00355     case 0x9D: return industry->last_month_pct_transported[variable - 0x9C];
    00356     /* amount of cargo produced LAST month. */
    00357     case 0x9E: return industry->last_month_production[0];
    00358     case 0x9F: return GB(industry->last_month_production[0], 8, 8);
    00359     case 0xA0: return industry->last_month_production[1];
    00360     case 0xA1: return GB(industry->last_month_production[1], 8, 8);
    00361     /* amount of cargo transported last month. */
    00362     case 0xA2: return industry->last_month_transported[0];
    00363     case 0xA3: return GB(industry->last_month_transported[0], 8, 8);
    00364     case 0xA4: return industry->last_month_transported[1];
    00365     case 0xA5: return GB(industry->last_month_transported[0], 8, 8);
    00366
    00367     case 0xA6: return industry->type;
    00368     case 0xA7: return industry->founder;
    00369     case 0xA8: return industry->random_colour;
    00370     case 0xA9: return Clamp(industry->last_prod_year - ORIGINAL_BASE_YEAR, 0, 255);
    00371     case 0xAA: return industry->counter;
    00372     case 0xAB: return GB(industry->counter, 8, 8);
    00373     case 0xAC: return industry->was_cargo_delivered;
    00374
    00375     case 0xB0: return Clamp(industry->construction_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Date when built since 1920 (in days)
    00376     case 0xB3: return industry->construction_type; // Construction type
    00377     case 0xB4: return Clamp(industry->last_cargo_accepted_at - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Date last cargo accepted since 1920 (in days)
    00378   }
    00379
    00380   DEBUG(grf, 1, "Unhandled industry property 0x%X", variable);
    00381
    00382   *available = false;
    00383   return (uint32)-1;
    00384 }
    00385
    00386 static const SpriteGroup *IndustryResolveReal(const ResolverObject *object, const SpriteGroup *group)
    00387 {
    00388   /* IndustryTile do not have 'real' groups */
    00389   return NULL;
    00390 }
    00391
    00392 static uint32 IndustryGetRandomBits(const ResolverObject *object)
    00393 {
    00394   return object->u.industry.ind == NULL ? 0 : object->u.industry.ind->random;
    00395 }
    00396
    00397 static uint32 IndustryGetTriggers(const ResolverObject *object)
    00398 {
    00399   return object->u.industry.ind == NULL ? 0 : object->u.industry.ind->random_triggers;
    00400 }
    00401
    00402 static void IndustrySetTriggers(const ResolverObject *object, int triggers)
    00403 {
    00404   if (object->u.industry.ind == NULL) return;
    00405   object->u.industry.ind->random_triggers = triggers;
    00406 }
    00407
    00408 static void NewIndustryResolver(ResolverObject *res, TileIndex tile, Industry *indus, IndustryType type)
    00409 {
    00410   res->GetRandomBits = IndustryGetRandomBits;
    00411   res->GetTriggers   = IndustryGetTriggers;
    00412   res->SetTriggers   = IndustrySetTriggers;
    00413   res->GetVariable   = IndustryGetVariable;
    00414   res->ResolveReal   = IndustryResolveReal;
    00415
    00416   res->psa             = &indus->psa;
    00417   res->u.industry.tile = tile;
    00418   res->u.industry.ind  = indus;
    00419   res->u.industry.gfx  = INVALID_INDUSTRYTILE;
    00420   res->u.industry.type = type;
    00421
    00422   res->callback        = CBID_NO_CALLBACK;
    00423   res->callback_param1 = 0;
    00424   res->callback_param2 = 0;
    00425   res->last_value      = 0;
    00426   res->trigger         = 0;
    00427   res->reseed          = 0;
    00428   res->count           = 0;
    00429
    00430   const IndustrySpec *indspec = GetIndustrySpec(type);
    00431   res->grffile         = (indspec != NULL ? indspec->grf_prop.grffile : NULL);
    00432 }
    00433
    00434 uint16 GetIndustryCallback(CallbackID callback, uint32 param1, uint32 param2, Industry *industry, IndustryType type, TileIndex tile)
    00435 {
    00436   ResolverObject object;
    00437   const SpriteGroup *group;
    00438
    00439   NewIndustryResolver(&object, tile, industry, type);
    00440   object.callback = callback;
    00441   object.callback_param1 = param1;
    00442   object.callback_param2 = param2;
    00443
    00444   group = Resolve(GetIndustrySpec(type)->grf_prop.spritegroup, &object);
    00445   if (group == NULL || group->type != SGT_CALLBACK) return CALLBACK_FAILED;
    00446
    00447   return group->g.callback.result;
    00448 }
    00449
    00450 uint32 IndustryLocationGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
    00451 {
    00452   const Industry *industry = object->u.industry.ind;
    00453   TileIndex tile = object->u.industry.tile;
    00454
    00455   if (object->scope == VSG_SCOPE_PARENT) {
    00456     return TownGetVariable(variable, parameter, available, industry->town);
    00457   }
    00458
    00459   switch (variable) {
    00460     case 0x80: return tile;
    00461     case 0x81: return GB(tile, 8, 8);
    00462
    00463     /* Pointer to the town the industry is associated with */
    00464     case 0x82: return industry->town->index;
    00465     case 0x83:
    00466     case 0x84:
    00467     case 0x85: DEBUG(grf, 0, "NewGRFs shouldn't be doing pointer magic"); break; // not supported
    00468
    00469     /* Number of the layout */
    00470     case 0x86: return industry->selected_layout;
    00471
    00472     /* Ground type */
    00473     case 0x87: return GetTerrainType(tile);
    00474
    00475     /* Town zone */
    00476     case 0x88: return GetTownRadiusGroup(industry->town, tile);
    00477
    00478     /* Manhattan distance of the closest town */
    00479     case 0x89: return min(DistanceManhattan(industry->town->xy, tile), 255);
    00480
    00481     /* Lowest height of the tile */
    00482     case 0x8A: return GetTileZ(tile);
    00483
    00484     /* Distance to the nearest water/land tile */
    00485     case 0x8B: return GetClosestWaterDistance(tile, (GetIndustrySpec(industry->type)->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
    00486
    00487     /* Square of Euclidian distance from town */
    00488     case 0x8D: return min(DistanceSquare(industry->town->xy, tile), 65535);
    00489
    00490     /* 32 random bits */
    00491     case 0x8F: return _industry_creation_random_bits;
    00492   }
    00493
    00494   /* None of the special ones, so try the general ones */
    00495   return IndustryGetVariable(object, variable, parameter, available);
    00496 }
    00497
    00498 bool CheckIfCallBackAllowsCreation(TileIndex tile, IndustryType type, uint itspec_index, uint32 seed)
    00499 {
    00500   const IndustrySpec *indspec = GetIndustrySpec(type);
    00501
    00502   ResolverObject object;
    00503   const SpriteGroup *group;
    00504
    00505   Industry ind;
    00506   ind.index = INVALID_INDUSTRY;
    00507   ind.xy = tile;
    00508   ind.width = 0;
    00509   ind.type = type;
    00510   ind.selected_layout = itspec_index;
    00511   ind.town = ClosestTownFromTile(tile, UINT_MAX);
    00512
    00513   NewIndustryResolver(&object, tile, &ind, type);
    00514   object.GetVariable = IndustryLocationGetVariable;
    00515   object.callback = CBID_INDUSTRY_LOCATION;
    00516   _industry_creation_random_bits = seed;
    00517
    00518   group = Resolve(GetIndustrySpec(type)->grf_prop.spritegroup, &object);
    00519
    00520   /* Unlike the "normal" cases, not having a valid result means we allow
    00521    * the building of the industry, as that's how it's done in TTDP. */
    00522   if (group == NULL || group->type != SGT_CALLBACK || group->g.callback.result == 0x400) return true;
    00523
    00524   /* Copy some parameters from the registers to the error message text ref. stack */
    00525   SwitchToErrorRefStack();
    00526   PrepareTextRefStackUsage(4);
    00527   SwitchToNormalRefStack();
    00528
    00529   switch (group->g.callback.result) {
    00530     case 0x401: _error_message = STR_0239_SITE_UNSUITABLE; break;
    00531     case 0x402: _error_message = STR_0317_CAN_ONLY_BE_BUILT_IN_RAINFOREST; break;
    00532     case 0x403: _error_message = STR_0318_CAN_ONLY_BE_BUILT_IN_DESERT; break;
    00533     default: _error_message = GetGRFStringID(indspec->grf_prop.grffile->grfid, 0xD000 + group->g.callback.result); break;
    00534   }
    00535
    00536   return false;
    00537 }
    00538
    00539 bool CheckIfCallBackAllowsAvailability(IndustryType type, IndustryAvailabilityCallType creation_type)
    00540 {
    00541   const IndustrySpec *indspec = GetIndustrySpec(type);
    00542
    00543   if (HasBit(indspec->callback_flags, CBM_IND_AVAILABLE)) {
    00544     uint16 res = GetIndustryCallback(CBID_INDUSTRY_AVAILABLE, 0, creation_type, NULL, type, INVALID_TILE);
    00545     if (res != CALLBACK_FAILED) {
    00546       return (res == 0);
    00547     }
    00548   }
    00549   return true;
    00550 }
    00551
    00552 static int32 DerefIndProd(uint field, bool use_register)
    00553 {
    00554   return use_register ? (int32)GetRegister(field) : field;
    00555 }
    00556
    00562 void IndustryProductionCallback(Industry *ind, int reason)
    00563 {
    00564   const IndustrySpec *spec = GetIndustrySpec(ind->type);
    00565   ResolverObject object;
    00566   NewIndustryResolver(&object, ind->xy, ind, ind->type);
    00567   if ((spec->behaviour & INDUSTRYBEH_PRODCALLBACK_RANDOM) != 0) object.callback_param1 = Random();
    00568   int multiplier = 1;
    00569   if ((spec->behaviour & INDUSTRYBEH_PROD_MULTI_HNDLING) != 0) multiplier = ind->prod_level;
    00570   object.callback_param2 = reason;
    00571
    00572   for (uint loop = 0;; loop++) {
    00573     SB(object.callback_param2, 8, 16, loop);
    00574     const SpriteGroup *group = Resolve(spec->grf_prop.spritegroup, &object);
    00575     if (group == NULL || group->type != SGT_INDUSTRY_PRODUCTION) break;
    00576
    00577     bool deref = (group->g.indprod.version == 1);
    00578
    00579     for (uint i = 0; i < 3; i++) {
    00580       ind->incoming_cargo_waiting[i] = Clamp(ind->incoming_cargo_waiting[i] - DerefIndProd(group->g.indprod.substract_input[i], deref) * multiplier, 0, 0xFFFF);
    00581     }
    00582     for (uint i = 0; i < 2; i++) {
    00583       ind->produced_cargo_waiting[i] = Clamp(ind->produced_cargo_waiting[i] + max(DerefIndProd(group->g.indprod.add_output[i], deref), 0) * multiplier, 0, 0xFFFF);
    00584     }
    00585
    00586     int32 again = DerefIndProd(group->g.indprod.again, deref);
    00587     if (again == 0) break;
    00588
    00589     SB(object.callback_param2, 24, 8, again);
    00590   }
    00591
    00592   InvalidateWindow(WC_INDUSTRY_VIEW, ind->index);
    00593 }