maedhros@6658: /* $Id$ */
maedhros@6658: 
maedhros@6658: /** @file newgrf_house.cpp */
maedhros@6658: 
maedhros@6658: #include "stdafx.h"
maedhros@6658: #include "openttd.h"
maedhros@6658: #include "functions.h"
maedhros@6658: #include "variables.h"
maedhros@6658: #include "debug.h"
maedhros@6658: #include "viewport.h"
maedhros@6669: #include "landscape.h"
maedhros@6658: #include "date.h"
maedhros@6658: #include "town.h"
maedhros@6658: #include "town_map.h"
maedhros@6658: #include "sound.h"
maedhros@6658: #include "sprite.h"
maedhros@6658: #include "strings.h"
maedhros@6658: #include "table/strings.h"
maedhros@6658: #include "table/sprites.h"
maedhros@6658: #include "table/town_land.h"
maedhros@6658: #include "newgrf.h"
maedhros@6658: #include "newgrf_house.h"
maedhros@6658: #include "newgrf_spritegroup.h"
maedhros@6658: #include "newgrf_callbacks.h"
maedhros@6658: #include "newgrf_town.h"
maedhros@6658: #include "newgrf_sound.h"
belugas@7125: #include "newgrf_commons.h"
belugas@8345: #include "transparency.h"
maedhros@6658: 
maedhros@6658: static BuildingCounts    _building_counts;
maedhros@6658: static HouseClassMapping _class_mapping[HOUSE_CLASS_MAX];
maedhros@6658: 
belugas@7125: HouseOverrideManager _house_mngr(NEW_HOUSE_OFFSET, HOUSE_MAX, INVALID_HOUSE_ID);
maedhros@6658: 
maedhros@6658: void CheckHouseIDs()
maedhros@6658: {
belugas@7961: 	InitializeBuildingCounts();
belugas@7961: 
maedhros@6658: 	for (TileIndex t = 0; t < MapSize(); t++) {
maedhros@6658: 		HouseID house_id;
maedhros@6658: 
maedhros@6658: 		if (!IsTileType(t, MP_HOUSE)) continue;
maedhros@6658: 
maedhros@6658: 		house_id = GetHouseType(t);
maedhros@6658: 		if (!GetHouseSpecs(house_id)->enabled && house_id >= NEW_HOUSE_OFFSET) {
maedhros@6658: 			/* The specs for this type of house are not available any more, so
maedhros@6658: 			 * replace it with the substitute original house type. */
belugas@7961: 			house_id = _house_mngr.GetSubstituteID(house_id);
belugas@7961: 			SetHouseType(t, house_id);
maedhros@6658: 		}
belugas@7961: 		IncreaseBuildingCount(GetTownByTile(t), house_id);
maedhros@6658: 	}
maedhros@6658: }
maedhros@6658: 
maedhros@6658: HouseClassID AllocateHouseClassID(byte grf_class_id, uint32 grfid)
maedhros@6658: {
maedhros@6658: 	/* Start from 1 because 0 means that no class has been assigned. */
maedhros@6658: 	for (int i = 1; i != lengthof(_class_mapping); i++) {
maedhros@6658: 		HouseClassMapping *map = &_class_mapping[i];
maedhros@6658: 
maedhros@6658: 		if (map->class_id == grf_class_id && map->grfid == grfid) return (HouseClassID)i;
maedhros@6658: 
maedhros@6658: 		if (map->class_id == 0 && map->grfid == 0) {
maedhros@6658: 			map->class_id = grf_class_id;
maedhros@6658: 			map->grfid    = grfid;
maedhros@6658: 			return (HouseClassID)i;
maedhros@6658: 		}
maedhros@6658: 	}
maedhros@6658: 	return HOUSE_NO_CLASS;
maedhros@6658: }
maedhros@6658: 
maedhros@6658: void InitializeBuildingCounts()
maedhros@6658: {
maedhros@6658: 	memset(&_building_counts, 0, sizeof(_building_counts));
maedhros@6658: }
maedhros@6658: 
maedhros@6658: /**
maedhros@6658:  * IncreaseBuildingCount()
maedhros@6658:  * Increase the count of a building when it has been added by a town.
maedhros@6658:  * @param t The town that the building is being built in
maedhros@6658:  * @param house_id The id of the house being added
maedhros@6658:  */
maedhros@6658: void IncreaseBuildingCount(Town *t, HouseID house_id)
maedhros@6658: {
maedhros@6658: 	HouseClassID class_id = GetHouseSpecs(house_id)->class_id;
maedhros@6658: 
belugas@7410: 	if (!_loaded_newgrf_features.has_newhouses) return;
maedhros@6658: 
maedhros@6658: 	/* If there are 255 buildings of this type in this town, there are also
maedhros@6658: 	 * at least that many houses of the same class in the town, and
maedhros@6658: 	 * therefore on the map as well. */
maedhros@6658: 	if (t->building_counts.id_count[house_id] == 255) return;
maedhros@6658: 
maedhros@6658: 	t->building_counts.id_count[house_id]++;
maedhros@6658: 	if (_building_counts.id_count[house_id] < 255) _building_counts.id_count[house_id]++;
maedhros@6658: 
maedhros@6658: 	/* Similarly, if there are 255 houses of this class in this town, there
maedhros@6658: 	 * must be at least that number on the map too. */
maedhros@6658: 	if (class_id == HOUSE_NO_CLASS || t->building_counts.class_count[class_id] == 255) return;
maedhros@6658: 
maedhros@6658: 	t->building_counts.class_count[class_id]++;
maedhros@6658: 	if (_building_counts.class_count[class_id] < 255) _building_counts.class_count[class_id]++;
maedhros@6658: }
maedhros@6658: 
maedhros@6658: /**
maedhros@6658:  * DecreaseBuildingCount()
maedhros@6658:  * Decrease the number of a building when it is deleted.
maedhros@6658:  * @param t The town that the building was built in
maedhros@6658:  * @param house_id The id of the house being removed
maedhros@6658:  */
maedhros@6658: void DecreaseBuildingCount(Town *t, HouseID house_id)
maedhros@6658: {
maedhros@6658: 	HouseClassID class_id = GetHouseSpecs(house_id)->class_id;
maedhros@6658: 
belugas@7410: 	if (!_loaded_newgrf_features.has_newhouses) return;
maedhros@6658: 
maedhros@6658: 	if (t->building_counts.id_count[house_id] > 0) t->building_counts.id_count[house_id]--;
maedhros@6658: 	if (_building_counts.id_count[house_id] > 0)   _building_counts.id_count[house_id]--;
maedhros@6658: 
maedhros@6658: 	if (class_id == HOUSE_NO_CLASS) return;
maedhros@6658: 
maedhros@6658: 	if (t->building_counts.class_count[class_id] > 0) t->building_counts.class_count[class_id]--;
maedhros@6658: 	if (_building_counts.class_count[class_id] > 0)   _building_counts.class_count[class_id]--;
maedhros@6658: }
maedhros@6658: 
maedhros@6658: /**
maedhros@6658:  * AfterLoadCountBuildings()
maedhros@6658:  *
maedhros@6658:  * After a savegame has been loaded, count the number of buildings on the map.
maedhros@6658:  */
maedhros@6658: void AfterLoadCountBuildings()
maedhros@6658: {
belugas@7410: 	if (!_loaded_newgrf_features.has_newhouses) return;
maedhros@6658: 
maedhros@6658: 	for (TileIndex t = 0; t < MapSize(); t++) {
maedhros@6658: 		if (!IsTileType(t, MP_HOUSE)) continue;
maedhros@6658: 		IncreaseBuildingCount(GetTownByTile(t), GetHouseType(t));
maedhros@6658: 	}
maedhros@6658: }
maedhros@6658: 
maedhros@6658: 
maedhros@6658: static uint32 HouseGetRandomBits(const ResolverObject *object)
maedhros@6658: {
maedhros@6658: 	const TileIndex tile = object->u.house.tile;
maedhros@6658: 	return (tile == INVALID_TILE || !IsTileType(tile, MP_HOUSE)) ? 0 : GetHouseRandomBits(tile);
maedhros@6658: }
maedhros@6658: 
maedhros@6658: static uint32 HouseGetTriggers(const ResolverObject *object)
maedhros@6658: {
maedhros@6658: 	const TileIndex tile = object->u.house.tile;
maedhros@6658: 	return (tile == INVALID_TILE || !IsTileType(tile, MP_HOUSE)) ? 0 : GetHouseTriggers(tile);
maedhros@6658: }
maedhros@6658: 
maedhros@6658: static void HouseSetTriggers(const ResolverObject *object, int triggers)
maedhros@6658: {
maedhros@6658: 	const TileIndex tile = object->u.house.tile;
maedhros@6658: 	if (IsTileType(tile, MP_HOUSE)) SetHouseTriggers(tile, triggers);
maedhros@6658: }
maedhros@6658: 
maedhros@6658: static uint32 GetNumHouses(HouseID house_id, const Town *town)
maedhros@6658: {
maedhros@6658: 	uint8 map_id_count, town_id_count, map_class_count, town_class_count;
maedhros@6658: 	HouseClassID class_id = GetHouseSpecs(house_id)->class_id;
maedhros@6658: 
maedhros@6658: 	map_id_count     = _building_counts.id_count[house_id];
maedhros@6658: 	map_class_count  = _building_counts.class_count[class_id];
maedhros@6658: 	town_id_count    = town->building_counts.id_count[house_id];
maedhros@6658: 	town_class_count = town->building_counts.class_count[class_id];
maedhros@6658: 
maedhros@6658: 	return map_class_count << 24 | town_class_count << 16 | map_id_count << 8 | town_id_count;
maedhros@6658: }
maedhros@6658: 
maedhros@6658: static uint32 GetGRFParameter(HouseID house_id, byte parameter)
maedhros@6658: {
maedhros@6658: 	const HouseSpec *hs = GetHouseSpecs(house_id);
maedhros@6658: 	const GRFFile *file = hs->grffile;
maedhros@6658: 
maedhros@6658: 	if (parameter >= file->param_end) return 0;
maedhros@6658: 	return file->param[parameter];
maedhros@6658: }
maedhros@6658: 
belugas@7323: uint32 GetNearbyTileInformation(byte parameter, TileIndex tile)
belugas@7323: {
belugas@7323: 	uint32 tile_type;
belugas@7323: 
belugas@7323: 	tile = GetNearbyTile(parameter, tile);
belugas@7323: 	tile_type = GetTerrainType(tile) << 2 | (IsTileType(tile, MP_WATER) ? 1 : 0) << 1;
belugas@7323: 
rubidium@8019: 	uint z;
rubidium@8019: 	Slope tileh = GetTileSlope(tile, &z);
rubidium@8019: 	return GetTileType(tile) << 24 | z << 16 | tile_type << 8 | tileh;
belugas@7323: }
belugas@7323: 
maedhros@6658: /**
maedhros@6658:  * HouseGetVariable():
maedhros@6658:  *
maedhros@6658:  * Used by the resolver to get values for feature 07 deterministic spritegroups.
maedhros@6658:  */
maedhros@6658: static uint32 HouseGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
maedhros@6658: {
maedhros@6658: 	const Town *town = object->u.house.town;
maedhros@6658: 	TileIndex tile   = object->u.house.tile;
maedhros@6658: 	HouseID house_id = object->u.house.house_id;
maedhros@6658: 
maedhros@6658: 	if (object->scope == VSG_SCOPE_PARENT) {
maedhros@6658: 		return TownGetVariable(variable, parameter, available, town);
maedhros@6658: 	}
maedhros@6658: 
maedhros@6658: 	switch (variable) {
maedhros@6658: 		/* Construction stage. */
maedhros@6658: 		case 0x40: return (IsTileType(tile, MP_HOUSE) ? GetHouseBuildingStage(tile) : 0) | OriginalTileRandomiser(TileX(tile), TileY(tile)) << 2;
maedhros@6658: 
maedhros@6658: 		/* Building age. */
maedhros@6658: 		case 0x41: return clamp(_cur_year - GetHouseConstructionYear(tile), 0, 0xFF);
maedhros@6658: 
maedhros@6658: 		/* Town zone */
maedhros@6658: 		case 0x42: return GetTownRadiusGroup(town, tile);
maedhros@6658: 
maedhros@6658: 		/* Terrain type */
maedhros@6658: 		case 0x43: return GetTerrainType(tile);
maedhros@6658: 
maedhros@6658: 		/* Number of this type of building on the map. */
maedhros@6658: 		case 0x44: return GetNumHouses(house_id, town);
maedhros@6658: 
maedhros@6658: 		/* Whether the town is being created or just expanded. */
maedhros@6658: 		case 0x45: return _generating_world ? 1 : 0;
maedhros@6658: 
maedhros@6658: 		/* Current animation frame. */
maedhros@6658: 		case 0x46: return IsTileType(tile, MP_HOUSE) ? GetHouseAnimationFrame(tile) : 0;
maedhros@6658: 
maedhros@6658: 
maedhros@6658: 		/* Building counts for old houses with id = parameter. */
maedhros@6658: 		case 0x60: return GetNumHouses(parameter, town);
maedhros@6658: 
maedhros@6658: 		/* Building counts for new houses with id = parameter. */
maedhros@6658: 		case 0x61: {
maedhros@6658: 			const HouseSpec *hs = GetHouseSpecs(house_id);
maedhros@6658: 			if (hs->grffile == NULL) return 0;
maedhros@6658: 
belugas@7125: 			HouseID new_house = _house_mngr.GetID(parameter, hs->grffile->grfid);
maedhros@6658: 			return new_house == INVALID_HOUSE_ID ? 0 : GetNumHouses(new_house, town);
maedhros@6658: 		}
maedhros@6658: 
maedhros@6658: 		/* Land info for nearby tiles. */
belugas@7323: 		case 0x62: return GetNearbyTileInformation(parameter, tile);
maedhros@6658: 
maedhros@6658: 		/* Read GRF parameter */
maedhros@6658: 		case 0x7F: return GetGRFParameter(object->u.house.house_id, parameter);
maedhros@6658: 	}
maedhros@6658: 
maedhros@6658: 	DEBUG(grf, 1, "Unhandled house property 0x%X", variable);
maedhros@6658: 
maedhros@6658: 	*available = false;
maedhros@6658: 	return UINT_MAX;
maedhros@6658: }
maedhros@6658: 
maedhros@6658: static const SpriteGroup *HouseResolveReal(const ResolverObject *object, const SpriteGroup *group)
maedhros@6658: {
maedhros@6658: 	/* Houses do not have 'real' groups */
maedhros@6658: 	return NULL;
maedhros@6658: }
maedhros@6658: 
maedhros@6658: /**
maedhros@6658:  * NewHouseResolver():
maedhros@6658:  *
maedhros@6658:  * Returns a resolver object to be used with feature 07 spritegroups.
maedhros@6658:  */
maedhros@6658: static void NewHouseResolver(ResolverObject *res, HouseID house_id, TileIndex tile, Town *town)
maedhros@6658: {
maedhros@6658: 	res->GetRandomBits = HouseGetRandomBits;
maedhros@6658: 	res->GetTriggers   = HouseGetTriggers;
maedhros@6658: 	res->SetTriggers   = HouseSetTriggers;
maedhros@6658: 	res->GetVariable   = HouseGetVariable;
maedhros@6658: 	res->ResolveReal   = HouseResolveReal;
maedhros@6658: 
maedhros@6658: 	res->u.house.tile     = tile;
maedhros@6658: 	res->u.house.town     = town;
maedhros@6658: 	res->u.house.house_id = house_id;
maedhros@6658: 
rubidium@7823: 	res->callback        = CBID_NO_CALLBACK;
maedhros@6658: 	res->callback_param1 = 0;
maedhros@6658: 	res->callback_param2 = 0;
maedhros@6658: 	res->last_value      = 0;
maedhros@6658: 	res->trigger         = 0;
maedhros@6658: 	res->reseed          = 0;
maedhros@6658: }
maedhros@6658: 
rubidium@7823: uint16 GetHouseCallback(CallbackID callback, uint32 param1, uint32 param2, HouseID house_id, Town *town, TileIndex tile)
maedhros@6658: {
maedhros@6658: 	ResolverObject object;
maedhros@6658: 	const SpriteGroup *group;
maedhros@6658: 
maedhros@6658: 	NewHouseResolver(&object, house_id, tile, town);
maedhros@6658: 	object.callback = callback;
maedhros@6658: 	object.callback_param1 = param1;
peter1138@7138: 	object.callback_param2 = param2;
maedhros@6658: 
maedhros@6658: 	group = Resolve(GetHouseSpecs(house_id)->spritegroup, &object);
maedhros@6658: 	if (group == NULL || group->type != SGT_CALLBACK) return CALLBACK_FAILED;
maedhros@6658: 
maedhros@6658: 	return group->g.callback.result;
maedhros@6658: }
maedhros@6658: 
maedhros@6658: void DrawTileLayout(const TileInfo *ti, const SpriteGroup *group, byte stage, HouseID house_id)
maedhros@6658: {
maedhros@6658: 	const DrawTileSprites *dts = group->g.layout.dts;
maedhros@6658: 	const DrawTileSeqStruct *dtss;
maedhros@6658: 
maedhros@6658: 	SpriteID image = dts->ground_sprite;
maedhros@6658: 	SpriteID pal   = dts->ground_pal;
maedhros@6658: 
maedhros@8115: 	if (IS_CUSTOM_SPRITE(image)) image += stage;
maedhros@8115: 
maedhros@6658: 	if (GB(image, 0, SPRITE_WIDTH) != 0) DrawGroundSprite(image, pal);
maedhros@6658: 
maedhros@6658: 	foreach_draw_tile_seq(dtss, dts->seq) {
maedhros@6658: 		if (GB(dtss->image, 0, SPRITE_WIDTH) == 0) continue;
maedhros@6658: 
maedhros@8115: 		image = dtss->image;
maedhros@6658: 		pal   = dtss->pal;
maedhros@6658: 
maedhros@8115: 		if (IS_CUSTOM_SPRITE(image)) image += stage;
maedhros@8115: 
belugas@8345: 		if ((HASBIT(image, SPRITE_MODIFIER_OPAQUE) || !IsTransparencySet(TO_HOUSES)) && HASBIT(image, PALETTE_MODIFIER_COLOR)) {
maedhros@6658: 			if (pal == 0) {
maedhros@6658: 				const HouseSpec *hs = GetHouseSpecs(house_id);
rubidium@8138: 				if (HASBIT(hs->callback_mask, CBM_HOUSE_COLOUR)) {
rubidium@8138: 					uint16 callback = GetHouseCallback(CBID_HOUSE_COLOUR, 0, 0, house_id, GetTownByTile(ti->tile), ti->tile);
maedhros@6658: 					if (callback != CALLBACK_FAILED) {
maedhros@6658: 						/* If bit 14 is set, we should use a 2cc colour map, else use the callback value. */
maedhros@6658: 						pal = HASBIT(callback, 14) ? GB(callback, 0, 8) + SPR_2CCMAP_BASE : callback;
maedhros@6658: 					}
maedhros@6658: 				} else {
maedhros@6658: 					pal = hs->random_colour[OriginalTileRandomiser(ti->x, ti->y)] + PALETTE_RECOLOR_START;
maedhros@6658: 				}
maedhros@6658: 			}
maedhros@6658: 		} else {
maedhros@6658: 			pal = PAL_NONE;
maedhros@6658: 		}
maedhros@6658: 
maedhros@6658: 		if ((byte)dtss->delta_z != 0x80) {
maedhros@6658: 			AddSortableSpriteToDraw(
maedhros@6658: 				image, pal,
maedhros@6658: 				ti->x + dtss->delta_x, ti->y + dtss->delta_y,
maedhros@6658: 				dtss->size_x, dtss->size_y,
rubidium@7829: 				dtss->size_z, ti->z + dtss->delta_z,
belugas@8345: 				IsTransparencySet(TO_HOUSES)
maedhros@6658: 			);
maedhros@6658: 		} else {
belugas@8345: 			AddChildSpriteScreen(image, pal, (byte)dtss->delta_x, (byte)dtss->delta_y, IsTransparencySet(TO_HOUSES));
maedhros@6658: 		}
maedhros@6658: 	}
maedhros@6658: }
maedhros@6658: 
maedhros@6658: void DrawNewHouseTile(TileInfo *ti, HouseID house_id)
maedhros@6658: {
maedhros@6658: 	const HouseSpec *hs = GetHouseSpecs(house_id);
maedhros@6658: 	const SpriteGroup *group;
maedhros@6658: 	ResolverObject object;
maedhros@6658: 
rubidium@7831: 	if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
maedhros@6658: 
maedhros@6658: 	NewHouseResolver(&object, house_id, ti->tile, GetTownByTile(ti->tile));
maedhros@6658: 
maedhros@6658: 	group = Resolve(hs->spritegroup, &object);
maedhros@6658: 	if (group == NULL || group->type != SGT_TILELAYOUT) {
maedhros@6658: 		/* XXX: This is for debugging purposes really, and shouldn't stay. */
maedhros@6658: 		DrawGroundSprite(SPR_SHADOW_CELL, PAL_NONE);
maedhros@6658: 	} else {
maedhros@6658: 		/* Limit the building stage to the number of stages supplied. */
maedhros@6658: 		byte stage = GetHouseBuildingStage(ti->tile);
maedhros@6658: 		stage = clamp(stage - 4 + group->g.layout.num_sprites, 0, group->g.layout.num_sprites - 1);
maedhros@6658: 		DrawTileLayout(ti, group, stage, house_id);
maedhros@6658: 	}
maedhros@6658: }
maedhros@6658: 
maedhros@6658: void AnimateNewHouseTile(TileIndex tile)
maedhros@6658: {
maedhros@6658: 	const HouseSpec *hs = GetHouseSpecs(GetHouseType(tile));
maedhros@6658: 	byte animation_speed = hs->animation_speed;
maedhros@6658: 	bool frame_set_by_callback = false;
maedhros@6658: 
rubidium@8138: 	if (HASBIT(hs->callback_mask, CBM_HOUSE_ANIMATION_SPEED)) {
peter1138@7138: 		uint16 callback_res = GetHouseCallback(CBID_HOUSE_ANIMATION_SPEED, 0, 0, GetHouseType(tile), GetTownByTile(tile), tile);
maedhros@6658: 		if (callback_res != CALLBACK_FAILED) animation_speed = clamp(callback_res & 0xFF, 2, 16);
maedhros@6658: 	}
maedhros@6658: 
maedhros@6658: 	/* An animation speed of 2 means the animation frame changes 4 ticks, and
maedhros@6658: 	 * increasing this value by one doubles the wait. 2 is the minimum value
maedhros@6658: 	 * allowed for animation_speed, which corresponds to 120ms, and 16 is the
maedhros@6658: 	 * maximum, corresponding to around 33 minutes. */
maedhros@6658: 	if (_tick_counter % (1 << animation_speed) != 0) return;
maedhros@6658: 
maedhros@6658: 	byte frame      = GetHouseAnimationFrame(tile);
maedhros@6658: 	byte num_frames = GB(hs->animation_frames, 0, 7);
maedhros@6658: 
rubidium@8138: 	if (HASBIT(hs->callback_mask, CBM_HOUSE_ANIMATION_NEXT_FRAME)) {
maedhros@6658: 		uint32 param = (hs->extra_flags & CALLBACK_1A_RANDOM_BITS) ? Random() : 0;
peter1138@7138: 		uint16 callback_res = GetHouseCallback(CBID_HOUSE_ANIMATION_NEXT_FRAME, param, 0, GetHouseType(tile), GetTownByTile(tile), tile);
maedhros@6658: 
maedhros@6658: 		if (callback_res != CALLBACK_FAILED) {
maedhros@6658: 			frame_set_by_callback = true;
maedhros@6658: 
maedhros@6658: 			switch (callback_res & 0xFF) {
maedhros@6658: 				case 0xFF:
maedhros@6658: 					DeleteAnimatedTile(tile);
maedhros@6658: 					break;
maedhros@6658: 				case 0xFE:
maedhros@6658: 					/* Carry on as normal. */
maedhros@6658: 					frame_set_by_callback = false;
maedhros@6658: 					break;
maedhros@6658: 				default:
maedhros@6658: 					frame = callback_res & 0xFF;
maedhros@6658: 					break;
maedhros@6658: 			}
maedhros@6658: 
maedhros@6658: 			/* If the lower 7 bits of the upper byte of the callback
maedhros@6658: 			 * result are not empty, it is a sound effect. */
maedhros@6658: 			if (GB(callback_res, 8, 7) != 0) PlayHouseSound(GB(callback_res, 8, 7), tile);
maedhros@6658: 		}
maedhros@6658: 	}
maedhros@6658: 
maedhros@6658: 	if (!frame_set_by_callback) {
maedhros@6658: 		if (frame < num_frames) {
maedhros@6658: 			frame++;
maedhros@6658: 		} else if (frame == num_frames && HASBIT(hs->animation_frames, 7)) {
maedhros@6658: 			/* This animation loops, so start again from the beginning */
maedhros@6658: 			frame = 0;
maedhros@6658: 		} else {
maedhros@6658: 			/* This animation doesn't loop, so stay here */
maedhros@6658: 			DeleteAnimatedTile(tile);
maedhros@6658: 		}
maedhros@6658: 	}
maedhros@6658: 
maedhros@6658: 	SetHouseAnimationFrame(tile, frame);
maedhros@6658: 	MarkTileDirtyByTile(tile);
maedhros@6658: }
maedhros@6658: 
maedhros@6658: void ChangeHouseAnimationFrame(TileIndex tile, uint16 callback_result)
maedhros@6658: {
maedhros@6658: 	switch (callback_result & 0xFF) {
maedhros@6658: 		case 0xFD: /* Do nothing. */         break;
maedhros@6658: 		case 0xFE: AddAnimatedTile(tile);    break;
maedhros@6658: 		case 0xFF: DeleteAnimatedTile(tile); break;
maedhros@6658: 		default:
maedhros@6658: 			SetHouseAnimationFrame(tile, callback_result & 0xFF);
maedhros@6658: 			AddAnimatedTile(tile);
maedhros@6658: 			break;
maedhros@6658: 	}
maedhros@6658: 	/* If the lower 7 bits of the upper byte of the callback
maedhros@6658: 	 * result are not empty, it is a sound effect. */
maedhros@6658: 	if (GB(callback_result, 8, 7) != 0) PlayHouseSound(GB(callback_result, 8, 7), tile);
maedhros@6658: }
maedhros@6658: 
maedhros@6658: bool CanDeleteHouse(TileIndex tile)
maedhros@6658: {
maedhros@6658: 	const HouseSpec *hs = GetHouseSpecs(GetHouseType(tile));
maedhros@6658: 
maedhros@6658: 	/* Human players are always allowed to remove buildings, as is water and
maedhros@6658: 	 * anyone using the scenario editor. */
maedhros@6658: 	if ((IsValidPlayer(_current_player) && IsHumanPlayer(_current_player))
maedhros@6658: 			|| _current_player == OWNER_WATER || _current_player == OWNER_NONE) return true;
maedhros@6658: 
maedhros@6658: 	if (HASBIT(hs->callback_mask, CBM_HOUSE_DENY_DESTRUCTION)) {
peter1138@7138: 		uint16 callback_res = GetHouseCallback(CBID_HOUSE_DENY_DESTRUCTION, 0, 0, GetHouseType(tile), GetTownByTile(tile), tile);
maedhros@6658: 		return (callback_res == CALLBACK_FAILED || callback_res == 0);
maedhros@6658: 	} else {
maedhros@6658: 		return !(hs->extra_flags & BUILDING_IS_PROTECTED);
maedhros@6658: 	}
maedhros@6658: }
maedhros@6658: 
maedhros@6658: static void AnimationControl(TileIndex tile, uint16 random_bits)
maedhros@6658: {
maedhros@6658: 	const HouseSpec *hs = GetHouseSpecs(GetHouseType(tile));
maedhros@6658: 
rubidium@8138: 	if (HASBIT(hs->callback_mask, CBM_HOUSE_ANIMATION_START_STOP)) {
maedhros@6658: 		uint32 param = (hs->extra_flags & SYNCHRONISED_CALLBACK_1B) ? (GB(Random(), 0, 16) | random_bits << 16) : Random();
peter1138@7138: 		uint16 callback_res = GetHouseCallback(CBID_HOUSE_ANIMATION_START_STOP, param, 0, GetHouseType(tile), GetTownByTile(tile), tile);
maedhros@6658: 
maedhros@6658: 		if (callback_res != CALLBACK_FAILED) ChangeHouseAnimationFrame(tile, callback_res);
maedhros@6658: 	}
maedhros@6658: }
maedhros@6658: 
maedhros@6658: bool NewHouseTileLoop(TileIndex tile)
maedhros@6658: {
maedhros@6658: 	const HouseSpec *hs = GetHouseSpecs(GetHouseType(tile));
maedhros@6658: 
maedhros@6658: 	if (GetHouseProcessingTime(tile) > 0) {
maedhros@6658: 		DecHouseProcessingTime(tile);
maedhros@6658: 		return true;
maedhros@6658: 	}
maedhros@6658: 
rubidium@8357: 	TriggerHouse(tile, HOUSE_TRIGGER_TILE_LOOP);
rubidium@8357: 	TriggerHouse(tile, HOUSE_TRIGGER_TILE_LOOP_TOP);
maedhros@6658: 
rubidium@8138: 	if (HASBIT(hs->callback_mask, CBM_HOUSE_ANIMATION_START_STOP)) {
maedhros@6658: 		/* If this house is marked as having a synchronised callback, all the
maedhros@6658: 		 * tiles will have the callback called at once, rather than when the
maedhros@6658: 		 * tile loop reaches them. This should only be enabled for the northern
maedhros@6658: 		 * tile, or strange things will happen (here, and in TTDPatch). */
maedhros@6658: 		if (hs->extra_flags & SYNCHRONISED_CALLBACK_1B) {
maedhros@6658: 			uint16 random = GB(Random(), 0, 16);
maedhros@6658: 
maedhros@6658: 			if (hs->building_flags & BUILDING_HAS_1_TILE)  AnimationControl(tile, random);
maedhros@6658: 			if (hs->building_flags & BUILDING_2_TILES_Y)   AnimationControl(TILE_ADDXY(tile, 0, 1), random);
maedhros@6658: 			if (hs->building_flags & BUILDING_2_TILES_X)   AnimationControl(TILE_ADDXY(tile, 1, 0), random);
maedhros@6658: 			if (hs->building_flags & BUILDING_HAS_4_TILES) AnimationControl(TILE_ADDXY(tile, 1, 1), random);
maedhros@6658: 		} else {
maedhros@6658: 			AnimationControl(tile, 0);
maedhros@6658: 		}
maedhros@6658: 	}
maedhros@6658: 
maedhros@6658: 	/* Check callback 21, which determines if a house should be destroyed. */
maedhros@6658: 	if (HASBIT(hs->callback_mask, CBM_HOUSE_DESTRUCTION)) {
peter1138@7138: 		uint16 callback_res = GetHouseCallback(CBID_HOUSE_DESTRUCTION, 0, 0, GetHouseType(tile), GetTownByTile(tile), tile);
maedhros@6658: 		if (callback_res != CALLBACK_FAILED && callback_res > 0) {
maedhros@6658: 			ClearTownHouse(GetTownByTile(tile), tile);
maedhros@6658: 			return false;
maedhros@6658: 		}
maedhros@6658: 	}
maedhros@6658: 
maedhros@6658: 	SetHouseProcessingTime(tile, hs->processing_time);
maedhros@6658: 	return true;
maedhros@6658: }
rubidium@8357: 
rubidium@8357: static void DoTriggerHouse(TileIndex tile, HouseTrigger trigger, byte base_random, bool first)
rubidium@8357: {
rubidium@8357: 	ResolverObject object;
rubidium@8357: 
rubidium@8357: 	/* We can't trigger a non-existent building... */
rubidium@8357: 	assert(IsTileType(tile, MP_HOUSE));
rubidium@8357: 
rubidium@8357: 	HouseID hid = GetHouseType(tile);
rubidium@8357: 	HouseSpec *hs = GetHouseSpecs(hid);
rubidium@8357: 
rubidium@8357: 	NewHouseResolver(&object, hid, tile, GetTownByTile(tile));
rubidium@8357: 
rubidium@8357: 	object.callback = CBID_RANDOM_TRIGGER;
rubidium@8357: 	object.trigger = trigger;
rubidium@8357: 
rubidium@8357: 	const SpriteGroup *group = Resolve(hs->spritegroup, &object);
rubidium@8357: 	if (group == NULL) return;
rubidium@8357: 
rubidium@8357: 	byte new_random_bits = Random();
rubidium@8357: 	byte random_bits = GetHouseRandomBits(tile);
rubidium@8357: 	random_bits &= ~object.reseed;
rubidium@8357: 	random_bits |= (first ? new_random_bits : base_random) & object.reseed;
rubidium@8357: 	SetHouseRandomBits(tile, random_bits);
rubidium@8357: 
rubidium@8357: 	switch (trigger) {
rubidium@8357: 		case HOUSE_TRIGGER_TILE_LOOP:
rubidium@8357: 			/* Random value already set. */
rubidium@8357: 			break;
rubidium@8357: 
rubidium@8357: 		case HOUSE_TRIGGER_TILE_LOOP_TOP:
rubidium@8357: 			if (!first) break;
rubidium@8357: 			/* Random value of first tile already set. */
rubidium@8357: 			if (hs->building_flags & BUILDING_2_TILES_Y)   DoTriggerHouse(TILE_ADDXY(tile, 0, 1), trigger, false, random_bits);
rubidium@8357: 			if (hs->building_flags & BUILDING_2_TILES_X)   DoTriggerHouse(TILE_ADDXY(tile, 1, 0), trigger, false, random_bits);
rubidium@8357: 			if (hs->building_flags & BUILDING_HAS_4_TILES) DoTriggerHouse(TILE_ADDXY(tile, 1, 1), trigger, false, random_bits);
rubidium@8357: 			break;
rubidium@8357: 	}
rubidium@8357: }
rubidium@8357: 
rubidium@8357: void TriggerHouse(TileIndex t, HouseTrigger trigger)
rubidium@8357: {
rubidium@8357: 	DoTriggerHouse(t, trigger, true, 0);
rubidium@8357: }