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73 lines
3.3 KiB
C
73 lines
3.3 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_railtype.h NewGRF handling of rail types. */
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#ifndef NEWGRF_RAILTYPE_H
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#define NEWGRF_RAILTYPE_H
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#include "rail.h"
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#include "newgrf_commons.h"
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#include "newgrf_spritegroup.h"
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struct TraceRestrictProgram;
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/** Resolver for the railtype scope. */
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struct RailTypeScopeResolver : public ScopeResolver {
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TileIndex tile; ///< Tracktile. For track on a bridge this is the southern bridgehead.
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TileContext context; ///< Are we resolving sprites for the upper halftile, or on a bridge?
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CustomSignalSpriteContext signal_context;
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const RailtypeInfo *rti;
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const TraceRestrictProgram *prog;
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/**
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* Constructor of the railtype scope resolvers.
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* @param ro Surrounding resolver.
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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 signal_context Signal context.
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*/
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RailTypeScopeResolver(ResolverObject &ro, const RailtypeInfo *rti, TileIndex tile, TileContext context, CustomSignalSpriteContext signal_context, const TraceRestrictProgram *prog)
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: ScopeResolver(ro), tile(tile), context(context), signal_context(signal_context), rti(rti), prog(prog)
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{
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}
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uint32 GetRandomBits() const override;
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uint32 GetVariable(uint16 variable, uint32 parameter, GetVariableExtra *extra) const override;
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};
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/** Resolver object for rail types. */
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struct RailTypeResolverObject : public ResolverObject {
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RailTypeScopeResolver railtype_scope; ///< Resolver for the railtype scope.
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RailTypeResolverObject(const RailtypeInfo *rti, TileIndex tile, TileContext context, RailTypeSpriteGroup rtsg, uint32 param1 = 0, uint32 param2 = 0, CustomSignalSpriteContext signal_context = CSSC_GUI, const TraceRestrictProgram *prog = nullptr);
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ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0) override
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{
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switch (scope) {
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case VSG_SCOPE_SELF: return &this->railtype_scope;
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default: return ResolverObject::GetScope(scope, relative);
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}
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}
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GrfSpecFeature GetFeature() const override;
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uint32 GetDebugID() const override;
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};
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struct CustomSignalSpriteResult {
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PalSpriteID sprite;
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bool restricted_valid;
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};
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SpriteID GetCustomRailSprite(const RailtypeInfo *rti, TileIndex tile, RailTypeSpriteGroup rtsg, TileContext context = TCX_NORMAL, uint *num_results = nullptr);
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CustomSignalSpriteResult GetCustomSignalSprite(const RailtypeInfo *rti, TileIndex tile, SignalType type, SignalVariant var, uint8 aspect, CustomSignalSpriteContext context, uint8 style, const TraceRestrictProgram *prog = nullptr);
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RailType GetRailTypeTranslation(uint8 railtype, const GRFFile *grffile);
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uint8 GetReverseRailTypeTranslation(RailType railtype, const GRFFile *grffile);
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#endif /* NEWGRF_RAILTYPE_H */
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