/* $Id$ */ /* * This file is part of OpenTTD. * 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. * 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. * 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/>. */ /** @file newgrf_generic.cpp Handling of generic feature callbacks. */ #include "stdafx.h" #include "debug.h" #include "newgrf_spritegroup.h" #include "industrytype.h" #include "core/random_func.hpp" #include "newgrf_sound.h" #include "water_map.h" #include <list> #include "safeguards.h" /** Scope resolver for generic objects and properties. */ struct GenericScopeResolver : public ScopeResolver { CargoID cargo_type; uint8 default_selection; uint8 src_industry; ///< Source industry substitute type. 0xFF for "town", 0xFE for "unknown". uint8 dst_industry; ///< Destination industry substitute type. 0xFF for "town", 0xFE for "unknown". uint8 distance; AIConstructionEvent event; uint8 count; uint8 station_size; GenericScopeResolver(ResolverObject &ro, bool ai_callback); /* virtual */ uint32 GetVariable(byte variable, uint32 parameter, bool *available) const; private: bool ai_callback; ///< Callback comes from the AI. }; /** Resolver object for generic objects/properties. */ struct GenericResolverObject : public ResolverObject { GenericScopeResolver generic_scope; GenericResolverObject(bool ai_callback, CallbackID callback = CBID_NO_CALLBACK); /* virtual */ ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0) { switch (scope) { case VSG_SCOPE_SELF: return &this->generic_scope; default: return ResolverObject::GetScope(scope, relative); } } /* virtual */ const SpriteGroup *ResolveReal(const RealSpriteGroup *group) const; }; struct GenericCallback { const GRFFile *file; const SpriteGroup *group; GenericCallback(const GRFFile *file, const SpriteGroup *group) : file(file), group(group) { } }; typedef std::list<GenericCallback> GenericCallbackList; static GenericCallbackList _gcl[GSF_END]; /** * Reset all generic feature callback sprite groups. */ void ResetGenericCallbacks() { for (uint8 feature = 0; feature < lengthof(_gcl); feature++) { _gcl[feature].clear(); } } /** * Add a generic feature callback sprite group to the appropriate feature list. * @param feature The feature for the callback. * @param file The GRF of the callback. * @param group The sprite group of the callback. */ void AddGenericCallback(uint8 feature, const GRFFile *file, const SpriteGroup *group) { if (feature >= lengthof(_gcl)) { grfmsg(5, "AddGenericCallback: Unsupported feature 0x%02X", feature); return; } /* Generic feature callbacks are evaluated in reverse (i.e. the last group * to be added is evaluated first, etc) thus we push the group to the * beginning of the list so a standard iterator will do the right thing. */ _gcl[feature].push_front(GenericCallback(file, group)); } /* virtual */ uint32 GenericScopeResolver::GetVariable(byte variable, uint32 parameter, bool *available) const { if (this->ai_callback) { switch (variable) { case 0x40: return this->ro.grffile->cargo_map[this->cargo_type]; case 0x80: return this->cargo_type; case 0x81: return CargoSpec::Get(this->cargo_type)->bitnum; case 0x82: return this->default_selection; case 0x83: return this->src_industry; case 0x84: return this->dst_industry; case 0x85: return this->distance; case 0x86: return this->event; case 0x87: return this->count; case 0x88: return this->station_size; default: break; } } DEBUG(grf, 1, "Unhandled generic feature variable 0x%02X", variable); *available = false; return UINT_MAX; } /* virtual */ const SpriteGroup *GenericResolverObject::ResolveReal(const RealSpriteGroup *group) const { if (group->num_loaded == 0) return NULL; return group->loaded[0]; } /** * Generic resolver. * @param ai_callback Callback comes from the AI. * @param callback Callback ID. */ GenericResolverObject::GenericResolverObject(bool ai_callback, CallbackID callback) : ResolverObject(NULL, callback), generic_scope(*this, ai_callback) { } /** * Generic scope resolver. * @param ro Surrounding resolver. * @param ai_callback Callback comes from the AI. */ GenericScopeResolver::GenericScopeResolver(ResolverObject &ro, bool ai_callback) : ScopeResolver(ro) { this->cargo_type = 0; this->default_selection = 0; this->src_industry = 0; this->dst_industry = 0; this->distance = 0; this->event = (AIConstructionEvent)0; this->count = 0; this->station_size = 0; this->ai_callback = ai_callback; } /** * Follow a generic feature callback list and return the first successful * answer * @param feature GRF Feature of callback * @param object pre-populated resolver object * @param param1_grfv7 callback_param1 for GRFs up to version 7. * @param param1_grfv8 callback_param1 for GRFs from version 8 on. * @param [out] file Optionally returns the GRFFile which made the final decision for the callback result. * May be NULL if not required. * @return callback value if successful or CALLBACK_FAILED */ static uint16 GetGenericCallbackResult(uint8 feature, ResolverObject &object, uint32 param1_grfv7, uint32 param1_grfv8, const GRFFile **file) { assert(feature < lengthof(_gcl)); /* Test each feature callback sprite group. */ for (GenericCallbackList::const_iterator it = _gcl[feature].begin(); it != _gcl[feature].end(); ++it) { object.grffile = it->file; object.root_spritegroup = it->group; /* Set callback param based on GRF version. */ object.callback_param1 = it->file->grf_version >= 8 ? param1_grfv8 : param1_grfv7; uint16 result = object.ResolveCallback(); if (result == CALLBACK_FAILED) continue; /* Return NewGRF file if necessary */ if (file != NULL) *file = it->file; return result; } /* No callback returned a valid result, so we've failed. */ return CALLBACK_FAILED; } /** * 'Execute' an AI purchase selection callback * * @param feature GRF Feature to call callback for. * @param cargo_type Cargotype to pass to callback. (Variable 80) * @param default_selection 'Default selection' to pass to callback. (Variable 82) * @param src_industry 'Source industry type' to pass to callback. (Variable 83) * @param dst_industry 'Destination industry type' to pass to callback. (Variable 84) * @param distance 'Distance between source and destination' to pass to callback. (Variable 85) * @param event 'AI construction event' to pass to callback. (Variable 86) * @param count 'Construction number' to pass to callback. (Variable 87) * @param station_size 'Station size' to pass to callback. (Variable 88) * @param [out] file Optionally returns the GRFFile which made the final decision for the callback result. * May be NULL if not required. * @return callback value if successful or CALLBACK_FAILED */ uint16 GetAiPurchaseCallbackResult(uint8 feature, CargoID cargo_type, uint8 default_selection, IndustryType src_industry, IndustryType dst_industry, uint8 distance, AIConstructionEvent event, uint8 count, uint8 station_size, const GRFFile **file) { GenericResolverObject object(true, CBID_GENERIC_AI_PURCHASE_SELECTION); if (src_industry != IT_AI_UNKNOWN && src_industry != IT_AI_TOWN) { const IndustrySpec *is = GetIndustrySpec(src_industry); /* If this is no original industry, use the substitute type */ if (is->grf_prop.subst_id != INVALID_INDUSTRYTYPE) src_industry = is->grf_prop.subst_id; } if (dst_industry != IT_AI_UNKNOWN && dst_industry != IT_AI_TOWN) { const IndustrySpec *is = GetIndustrySpec(dst_industry); /* If this is no original industry, use the substitute type */ if (is->grf_prop.subst_id != INVALID_INDUSTRYTYPE) dst_industry = is->grf_prop.subst_id; } object.generic_scope.cargo_type = cargo_type; object.generic_scope.default_selection = default_selection; object.generic_scope.src_industry = src_industry; object.generic_scope.dst_industry = dst_industry; object.generic_scope.distance = distance; object.generic_scope.event = event; object.generic_scope.count = count; object.generic_scope.station_size = station_size; uint16 callback = GetGenericCallbackResult(feature, object, 0, 0, file); if (callback != CALLBACK_FAILED) callback = GB(callback, 0, 8); return callback; } /** * 'Execute' the ambient sound effect callback. * @param tile Tile the sound effect should be generated for. */ void AmbientSoundEffectCallback(TileIndex tile) { assert(IsTileType(tile, MP_CLEAR) || IsTileType(tile, MP_TREES) || IsTileType(tile, MP_WATER)); /* Only run every 1/200-th time. */ uint32 r; // Save for later if (!Chance16R(1, 200, r) || !_settings_client.sound.ambient) return; /* Prepare resolver object. */ GenericResolverObject object(false, CBID_SOUNDS_AMBIENT_EFFECT); uint32 param1_v7 = GetTileType(tile) << 28 | Clamp(TileHeight(tile), 0, 15) << 24 | GB(r, 16, 8) << 16 | GetTerrainType(tile); uint32 param1_v8 = GetTileType(tile) << 24 | GetTileZ(tile) << 16 | GB(r, 16, 8) << 8 | (HasTileWaterClass(tile) ? GetWaterClass(tile) : 0) << 3 | GetTerrainType(tile); /* Run callback. */ const GRFFile *grf_file; uint16 callback = GetGenericCallbackResult(GSF_SOUNDFX, object, param1_v7, param1_v8, &grf_file); if (callback != CALLBACK_FAILED) PlayTileSound(grf_file, callback, tile); }