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NewGRF: Allow using Action 2/3 for custom signal sprites

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This is mostly the same format as the railtype custom signal mechanism
This commit is contained in:
Jonathan G Rennison
2021-08-20 00:49:48 +01:00
parent a6b0d0cde4
commit 322a046f49
10 changed files with 300 additions and 18 deletions
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67
src/newgrf_newsignals.cpp Normal file
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/*
* 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_newsignals.cpp NewGRF handling of new signals. */
#include "stdafx.h"
#include "debug.h"
#include "newgrf_newsignals.h"
#include "map_func.h"
#include "safeguards.h"
std::vector<const GRFFile *> _new_signals_grfs;
/* virtual */ uint32 NewSignalsScopeResolver::GetRandomBits() const
{
uint tmp = CountBits(this->tile + (TileX(this->tile) + TileY(this->tile)) * TILE_SIZE);
return GB(tmp, 0, 2);
}
/* virtual */ uint32 NewSignalsScopeResolver::GetVariable(byte variable, uint32 parameter, GetVariableExtra *extra) const
{
if (this->tile == INVALID_TILE) {
switch (variable) {
case 0x40: return 0;
}
}
switch (variable) {
case 0x40: return GetTerrainType(this->tile, this->context);
}
DEBUG(grf, 1, "Unhandled new signals tile variable 0x%X", variable);
extra->available = false;
return UINT_MAX;
}
/* virtual */ const SpriteGroup *NewSignalsResolverObject::ResolveReal(const RealSpriteGroup *group) const
{
if (!group->loading.empty()) return group->loading[0];
if (!group->loaded.empty()) return group->loaded[0];
return nullptr;
}
GrfSpecFeature NewSignalsResolverObject::GetFeature() const
{
return GSF_SIGNALS;
}
/**
* Resolver object for rail types.
* @param grffile GRF file.
* @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?
* @param param1 Extra parameter (first parameter of the callback, except railtypes do not have callbacks).
* @param param2 Extra parameter (second parameter of the callback, except railtypes do not have callbacks).
*/
NewSignalsResolverObject::NewSignalsResolverObject(const GRFFile *grffile, TileIndex tile, TileContext context, uint32 param1, uint32 param2)
: ResolverObject(grffile, CBID_NO_CALLBACK, param1, param2), newsignals_scope(*this, tile, context)
{
this->root_spritegroup = grffile != nullptr ? grffile->new_signals_group : nullptr;
}