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/* $Id$ */
/*
* 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_railtype.h NewGRF handling of rail types. */
#ifndef NEWGRF_RAILTYPE_H
#define NEWGRF_RAILTYPE_H
#include "rail.h"
#include "newgrf_commons.h"
#include "newgrf_spritegroup.h"
/** Resolver for the railtype scope. */
struct RailTypeScopeResolver : public ScopeResolver {
TileIndex tile; ///< Tracktile. For track on a bridge this is the southern bridgehead.
TileContext context; ///< Are we resolving sprites for the upper halftile, or on a bridge?
/**
* Constructor of the railtype scope resolvers.
* @param ro Surrounding resolver.
* @param tile %Tile containing the track. For track on a bridge this is the southern bridgehead.
* @param context Are we resolving sprites for the upper halftile, or on a bridge?
*/
RailTypeScopeResolver(ResolverObject &ro, TileIndex tile, TileContext context)
: ScopeResolver(ro), tile(tile), context(context)
{
}
/* virtual */ uint32 GetRandomBits() const;
/* virtual */ uint32 GetVariable(byte variable, uint32 parameter, bool *available) const;
};
/** Resolver object for rail types. */
struct RailTypeResolverObject : public ResolverObject {
RailTypeScopeResolver railtype_scope; ///< Resolver for the railtype scope.
RailTypeResolverObject(const RailtypeInfo *rti, TileIndex tile, TileContext context, RailTypeSpriteGroup rtsg, uint32 param1 = 0, uint32 param2 = 0);
/* virtual */ ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0)
{
switch (scope) {
case VSG_SCOPE_SELF: return &this->railtype_scope;
default: return ResolverObject::GetScope(scope, relative);
}
}
/* virtual */ const SpriteGroup *ResolveReal(const RealSpriteGroup *group) const;
};
SpriteID GetCustomRailSprite(const RailtypeInfo *rti, TileIndex tile, RailTypeSpriteGroup rtsg, TileContext context = TCX_NORMAL, uint *num_results = NULL);
SpriteID GetCustomSignalSprite(const RailtypeInfo *rti, TileIndex tile, SignalType type, SignalVariant var, SignalState state, bool gui = false);
uint8 GetReverseRailTypeTranslation(RailType railtype, const GRFFile *grffile);
#endif /* NEWGRF_RAILTYPE_H */
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