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142 lines
5.4 KiB
C++
142 lines
5.4 KiB
C++
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file newgrf_newsignals.cpp NewGRF handling of new signals. */
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#include "stdafx.h"
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#include "debug.h"
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#include "newgrf_newsignals.h"
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#include "newgrf_extension.h"
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#include "map_func.h"
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#include "tracerestrict.h"
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#include "string_func.h"
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#include "safeguards.h"
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std::vector<const GRFFile *> _new_signals_grfs;
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std::array<NewSignalStyle, MAX_NEW_SIGNAL_STYLES> _new_signal_styles;
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std::array<NewSignalStyleMapping, MAX_NEW_SIGNAL_STYLES> _new_signal_style_mapping;
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uint8_t _num_new_signal_styles = 0;
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uint16_t _enabled_new_signal_styles_mask = 0;
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/* virtual */ uint32_t NewSignalsScopeResolver::GetRandomBits() const
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{
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uint tmp = CountBits(this->tile + (TileX(this->tile) + TileY(this->tile)) * TILE_SIZE);
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return GB(tmp, 0, 2);
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}
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static uint8_t MapSignalStyle(uint8_t style)
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{
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return style != 0 ? _new_signal_styles[style - 1].grf_local_id : 0;
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}
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uint32_t GetNewSignalsSideVariable()
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{
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bool side;
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switch (_settings_game.construction.train_signal_side) {
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case 0: side = false; break; // left
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case 2: side = true; break; // right
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default: side = _settings_game.vehicle.road_side != 0; break; // driving side
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}
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return side ? 1 : 0;
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}
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/* virtual */ uint32_t NewSignalsScopeResolver::GetVariable(uint16_t variable, uint32_t parameter, GetVariableExtra *extra) const
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{
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if (this->tile == INVALID_TILE) {
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switch (variable) {
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case 0x40: return 0;
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case A2VRI_SIGNALS_SIGNAL_RESTRICTION_INFO: return 0;
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case A2VRI_SIGNALS_SIGNAL_CONTEXT: return GetNewSignalsSignalContext(this->signal_context);
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case A2VRI_SIGNALS_SIGNAL_STYLE: return MapSignalStyle(this->signal_style);
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case A2VRI_SIGNALS_SIGNAL_SIDE: return GetNewSignalsSideVariable();
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case A2VRI_SIGNALS_SIGNAL_VERTICAL_CLEARANCE: return 0xFF;
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}
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}
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switch (variable) {
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case 0x40: return GetTerrainType(this->tile, this->context);
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case A2VRI_SIGNALS_SIGNAL_RESTRICTION_INFO:
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return GetNewSignalsRestrictedSignalsInfo(this->prog, this->tile, this->signal_style);
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case A2VRI_SIGNALS_SIGNAL_CONTEXT:
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return GetNewSignalsSignalContext(this->signal_context);
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case A2VRI_SIGNALS_SIGNAL_STYLE: return MapSignalStyle(this->signal_style);
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case A2VRI_SIGNALS_SIGNAL_SIDE: return GetNewSignalsSideVariable();
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case A2VRI_SIGNALS_SIGNAL_VERTICAL_CLEARANCE: return GetNewSignalsVerticalClearanceInfo(this->tile, this->z);
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}
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DEBUG(grf, 1, "Unhandled new signals tile variable 0x%X", variable);
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extra->available = false;
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return UINT_MAX;
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}
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/* virtual */ const SpriteGroup *NewSignalsResolverObject::ResolveReal(const RealSpriteGroup *group) const
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{
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if (!group->loading.empty()) return group->loading[0];
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if (!group->loaded.empty()) return group->loaded[0];
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return nullptr;
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}
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GrfSpecFeature NewSignalsResolverObject::GetFeature() const
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{
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return GSF_SIGNALS;
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}
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/**
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* Resolver object for rail types.
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* @param grffile GRF file.
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* @param tile %Tile containing the track. For track on a bridge this is the southern bridgehead.
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* @param context Are we resolving sprites for the upper halftile, or on a bridge?
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* @param param1 Extra parameter (first parameter of the callback, except railtypes do not have callbacks).
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* @param param2 Extra parameter (second parameter of the callback, except railtypes do not have callbacks).
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* @param signal_context Signal context.
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* @param prog Routing restriction program.
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* @param z Signal pixel z.
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*/
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NewSignalsResolverObject::NewSignalsResolverObject(const GRFFile *grffile, TileIndex tile, TileContext context, uint32_t param1, uint32_t param2,
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CustomSignalSpriteContext signal_context, uint8_t signal_style, const TraceRestrictProgram *prog, uint z)
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: ResolverObject(grffile, CBID_NO_CALLBACK, param1, param2), newsignals_scope(*this, tile, context, signal_context, signal_style, prog, z)
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{
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this->root_spritegroup = grffile != nullptr ? grffile->new_signals_group : nullptr;
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}
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uint GetNewSignalsRestrictedSignalsInfo(const TraceRestrictProgram *prog, TileIndex tile, uint8_t signal_style)
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{
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uint result = 0;
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if (signal_style != 0 && HasBit(_signal_style_masks.always_reserve_through, signal_style)) result |= 2;
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if (prog != nullptr) {
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result |= 1;
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if ((prog->actions_used_flags & TRPAUF_RESERVE_THROUGH_ALWAYS) && !IsTileType(tile, MP_TUNNELBRIDGE)) result |= 2;
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if ((prog->actions_used_flags & TRPAUF_REVERSE) && !IsTileType(tile, MP_TUNNELBRIDGE)) result |= 4;
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}
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return result;
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}
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uint GetNewSignalsVerticalClearanceInfo(TileIndex tile, uint z)
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{
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if (IsBridgeAbove(tile)) {
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uint height = GetBridgePixelHeight(GetNorthernBridgeEnd(tile));
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return std::min<uint>(0xFF, height - z);
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} else {
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return 0xFF;
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}
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}
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void DumpNewSignalsSpriteGroups(SpriteGroupDumper &dumper)
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{
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bool first = true;
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for (const GRFFile *grf : _new_signals_grfs) {
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if (!first) dumper.Print("");
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char buffer[64];
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seprintf(buffer, lastof(buffer), "GRF: %08X", BSWAP32(grf->grfid));
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dumper.Print(buffer);
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first = false;
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dumper.DumpSpriteGroup(grf->new_signals_group, 0);
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}
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}
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