Files @ r9036:e33a0264e0c3
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Location: cpp/openttd-patchpack/source/src/newgrf_cargo.cpp

rubidium
(svn r12855) -Codechange: do not use autoptr's for testing whether certain objects can be build, but check it directly in the pool so we do not have to call destructors in the testing phase. Stations still use the autoptr though.
/* $Id$ */

#include "stdafx.h"
#include "openttd.h"
#include "debug.h"
#include "cargotype.h"
#include "newgrf.h"
#include "newgrf_callbacks.h"
#include "newgrf_spritegroup.h"
#include "newgrf_cargo.h"


static uint32 CargoGetRandomBits(const ResolverObject *object)
{
	return 0;
}


static uint32 CargoGetTriggers(const ResolverObject *object)
{
	return 0;
}


static void CargoSetTriggers(const ResolverObject *object, int triggers)
{
	return;
}


static uint32 CargoGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
{
	DEBUG(grf, 1, "Unhandled cargo property 0x%X", variable);

	*available = false;
	return 0;
}


static const SpriteGroup *CargoResolveReal(const ResolverObject *object, const SpriteGroup *group)
{
	/* Cargo action 2s should always have only 1 "loaded" state, but some
	 * times things don't follow the spec... */
	if (group->g.real.num_loaded > 0) return group->g.real.loaded[0];
	if (group->g.real.num_loading > 0) return group->g.real.loading[0];

	return NULL;
}


static void NewCargoResolver(ResolverObject *res, const CargoSpec *cs)
{
	res->GetRandomBits = &CargoGetRandomBits;
	res->GetTriggers   = &CargoGetTriggers;
	res->SetTriggers   = &CargoSetTriggers;
	res->GetVariable   = &CargoGetVariable;
	res->ResolveReal   = &CargoResolveReal;

	res->u.cargo.cs = cs;

	res->callback        = CBID_NO_CALLBACK;
	res->callback_param1 = 0;
	res->callback_param2 = 0;
	res->last_value      = 0;
	res->trigger         = 0;
	res->reseed          = 0;
	res->count           = 0;
}


SpriteID GetCustomCargoSprite(const CargoSpec *cs)
{
	const SpriteGroup *group;
	ResolverObject object;

	NewCargoResolver(&object, cs);

	group = Resolve(cs->group, &object);
	if (group == NULL || group->type != SGT_RESULT) return 0;

	return group->g.result.sprite;
}


uint16 GetCargoCallback(CallbackID callback, uint32 param1, uint32 param2, const CargoSpec *cs)
{
	ResolverObject object;
	const SpriteGroup *group;

	NewCargoResolver(&object, cs);
	object.callback = callback;
	object.callback_param1 = param1;
	object.callback_param2 = param2;

	group = Resolve(cs->group, &object);
	if (group == NULL || group->type != SGT_CALLBACK) return CALLBACK_FAILED;

	return group->g.callback.result;
}


CargoID GetCargoTranslation(uint8 cargo, const GRFFile *grffile, bool usebit)
{
	/* Pre-version 7 uses the 'climate dependent' ID, i.e. cargo is the cargo ID */
	if (grffile->grf_version < 7) {
		if (!usebit) return cargo;
		/* Else the cargo value is a 'climate independent' 'bitnum' */
		if (HasBit(_cargo_mask, cargo)) return GetCargoIDByBitnum(cargo);
	} else {
		/* If the GRF contains a translation table (and the cargo is in bounds)
		 * then get the cargo ID for the label */
		if (cargo < grffile->cargo_max) return GetCargoIDByLabel(grffile->cargo_list[cargo]);
	}
	return CT_INVALID;
}

uint8 GetReverseCargoTranslation(CargoID cargo, const GRFFile *grffile)
{
	/* Note: All grf versions use CargoBit here. Pre-version 7 do NOT use the 'climate dependent' ID. */
	const CargoSpec *cs = GetCargo(cargo);

	/* If the GRF contains a translation table (and the cargo is in the table)
	 * then get the cargo ID for the label */
	for (uint i = 0; i < grffile->cargo_max; i++) {
		if (cs->label == grffile->cargo_list[i]) return i;
	}

	/* No matching label was found, so we return the 'climate independent' 'bitnum' */
	return cs->bitnum;;
}