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qzdoom/src/p_xlat.cpp
Christoph Oelckers 203f88ce6e - some sanitizing of sector tag/line id management: 
* make setting the line ID with P_TranslateLineDef explicit because there's one FraggleScript function that needs to work around the changes caused by this. There's also some functions setting only a temporary linedef. These would inevitably cause problems if the underlying data gets changed.
* remove FS function 'ChangeTag'. Fortunately this was just some long forgotten test stuff that can be removed without affecting any maps, but the feature would cause some serious problems in a more complex system.

With these changes it is guaranteed that after map setup the tag/ids won't change anymore.
2015-04-15 20:10:27 +02:00

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/*
** p_xlat.cpp
** Translate old Doom format maps to the Hexen format
**
**---------------------------------------------------------------------------
** Copyright 1998-2007 Randy Heit
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
*/
#include "doomtype.h"
#include "g_level.h"
#include "p_lnspec.h"
#include "doomdata.h"
#include "m_swap.h"
#include "p_spec.h"
#include "p_local.h"
#include "a_sharedglobal.h"
#include "gi.h"
#include "w_wad.h"
#include "sc_man.h"
#include "cmdlib.h"
#include "xlat/xlat.h"
// define names for the TriggerType field of the general linedefs
typedef enum
{
WalkOnce,
WalkMany,
SwitchOnce,
SwitchMany,
GunOnce,
GunMany,
PushOnce,
PushMany,
} triggertype_e;
void P_TranslateLineDef (line_t *ld, maplinedef_t *mld, bool setid)
{
unsigned short special = (unsigned short) LittleShort(mld->special);
short tag = LittleShort(mld->tag);
DWORD flags = LittleShort(mld->flags);
INTBOOL passthrough = 0;
DWORD flags1 = flags;
DWORD newflags = 0;
for(int i=0;i<16;i++)
{
if ((flags & (1<<i)) && LineFlagTranslations[i].ismask)
{
flags1 &= LineFlagTranslations[i].newvalue;
}
}
for(int i=0;i<16;i++)
{
if ((flags1 & (1<<i)) && !LineFlagTranslations[i].ismask)
{
switch (LineFlagTranslations[i].newvalue)
{
case -1:
passthrough = true;
break;
case -2:
ld->Alpha = FRACUNIT*3/4;
break;
case -3:
ld->Alpha = FRACUNIT / 4;
break;
default:
newflags |= LineFlagTranslations[i].newvalue;
break;
}
}
}
flags = newflags;
if (setid)
{
// For purposes of maintaining BOOM compatibility, each
// line also needs to have its ID set to the same as its tag.
// An external conversion program would need to do this more
// intelligently.
ld->SetMainId(tag);
}
// 0 specials are never translated.
if (special == 0)
{
ld->special = 0;
ld->flags = flags;
ld->args[0] = mld->tag;
memset (ld->args+1, 0, sizeof(ld->args)-sizeof(ld->args[0]));
return;
}
FLineTrans *linetrans = NULL;
if (special < SimpleLineTranslations.Size()) linetrans = &SimpleLineTranslations[special];
if (linetrans != NULL && linetrans->special != 0)
{
ld->special = linetrans->special;
ld->flags = flags | ((linetrans->flags & 0x1f) << 9);
if (linetrans->flags & 0x20) ld->flags |= ML_FIRSTSIDEONLY;
ld->activation = 1 << GET_SPAC(ld->flags);
if (ld->activation == SPAC_AnyCross)
{ // this is really PTouch
ld->activation = SPAC_Impact|SPAC_PCross;
}
else if (ld->activation == SPAC_Impact)
{ // In non-UMDF maps, Impact implies PCross
ld->activation = SPAC_Impact | SPAC_PCross;
}
ld->flags &= ~ML_SPAC_MASK;
if (passthrough && ld->activation == SPAC_Use)
{
ld->activation = SPAC_UseThrough;
}
// Set special arguments.
FXlatExprState state;
state.tag = tag;
state.linetype = special;
for (int t = 0; t < LINETRANS_MAXARGS; ++t)
{
int arg = linetrans->args[t];
int argop = (linetrans->flags >> (LINETRANS_TAGSHIFT + t*TAGOP_NUMBITS)) & TAGOP_MASK;
switch (argop)
{
case ARGOP_Const:
ld->args[t] = arg;
break;
case ARGOP_Tag:
ld->args[t] = tag;
break;
case ARGOP_Expr:
{
int *xnode = &XlatExpressions[arg];
state.bIsConstant = true;
XlatExprEval[*xnode](&ld->args[t], xnode, &state);
}
break;
default:
assert(0);
ld->args[t] = 0;
break;
}
}
if ((ld->flags & ML_SECRET) && ld->activation & (SPAC_Use|SPAC_UseThrough))
{
ld->flags &= ~ML_MONSTERSCANACTIVATE;
}
return;
}
for(int i=0;i<NumBoomish;i++)
{
FBoomTranslator *b = &Boomish[i];
if (special >= b->FirstLinetype && special <= b->LastLinetype)
{
ld->special = b->NewSpecial;
switch (special & 0x0007)
{
case WalkMany:
flags |= ML_REPEAT_SPECIAL;
case WalkOnce:
ld->activation = SPAC_Cross;
break;
case SwitchMany:
case PushMany:
flags |= ML_REPEAT_SPECIAL;
case SwitchOnce:
case PushOnce:
if (passthrough)
ld->activation = SPAC_UseThrough;
else
ld->activation = SPAC_Use;
break;
case GunMany:
flags |= ML_REPEAT_SPECIAL;
case GunOnce:
ld->activation = SPAC_Impact;
break;
}
ld->args[0] = tag;
ld->args[1] = ld->args[2] = ld->args[3] = ld->args[4] = 0;
for(unsigned j=0; j < b->Args.Size(); j++)
{
FBoomArg *arg = &b->Args[j];
int *destp;
int flagtemp;
BYTE val = 0; // quiet, GCC
bool found;
if (arg->ArgNum < 4)
{
destp = &ld->args[arg->ArgNum+1];
}
else
{
flagtemp = ((flags >> 9) & 0x3f);
destp = &flagtemp;
}
if (arg->ListSize == 0)
{
val = arg->ConstantValue;
found = true;
}
else
{
found = false;
for (int k = 0; k < arg->ListSize; k++)
{
if ((special & arg->AndValue) == arg->ResultFilter[k])
{
val = arg->ResultValue[k];
found = true;
}
}
}
if (found)
{
if (arg->bOrExisting)
{
*destp |= val;
}
else
{
*destp = val;
}
if (arg->ArgNum == 4)
{
flags = (flags & ~0x7e00) | (flagtemp << 9);
}
}
}
// We treat push triggers like switch triggers with zero tags.
if ((special & 7) == PushMany || (special & 7) == PushOnce)
{
if (ld->special == Generic_Door)
{
ld->args[2] |= 128;
}
else
{
ld->args[0] = 0;
}
}
ld->flags = flags;
if (flags & ML_MONSTERSCANACTIVATE && ld->activation == SPAC_Cross)
{
// In Boom anything can activate such a line so set the proper type here.
ld->activation = SPAC_AnyCross;
}
return;
}
}
// Don't know what to do, so 0 it
ld->special = 0;
ld->flags = flags;
memset (ld->args, 0, sizeof(ld->args));
}
// Now that ZDoom again gives the option of using Doom's original teleport
// behavior, only teleport dests in a sector with a 0 tag need to be
// given a TID. And since Doom format maps don't have TIDs, we can safely
// give them TID 1.
void P_TranslateTeleportThings ()
{
AActor *dest;
TThinkerIterator<AActor> iterator(NAME_TeleportDest);
bool foundSomething = false;
while ( (dest = iterator.Next()) )
{
if (dest->Sector->GetMainTag() == 0)
{
dest->tid = 1;
dest->AddToHash ();
foundSomething = true;
}
}
if (foundSomething)
{
for (int i = 0; i < numlines; ++i)
{
if (lines[i].special == Teleport)
{
if (lines[i].args[1] == 0)
{
lines[i].args[0] = 1;
}
}
else if (lines[i].special == Teleport_NoFog)
{
if (lines[i].args[2] == 0)
{
lines[i].args[0] = 1;
}
}
else if (lines[i].special == Teleport_ZombieChanger)
{
if (lines[i].args[1] == 0)
{
lines[i].args[0] = 1;
}
}
}
}
}
int P_TranslateSectorSpecial (int special)
{
int mask = 0;
for(int i = SectorMasks.Size()-1; i>=0; i--)
{
int newmask = special & SectorMasks[i].mask;
if (newmask)
{
special &= ~newmask;
if (SectorMasks[i].op == 1)
newmask <<= SectorMasks[i].shift;
else if (SectorMasks[i].op == -1)
newmask >>= SectorMasks[i].shift;
else if (SectorMasks[i].op == 0 && SectorMasks[i].shift == 1)
newmask = 0;
mask |= newmask;
}
}
if ((unsigned)special < SectorTranslations.Size())
{
if (!SectorTranslations[special].bitmask_allowed && mask)
special = 0;
else
special = SectorTranslations[special].newtype;
}
return special | mask;
}
static const int *Expr_Const(int *dest, const int *xnode, FXlatExprState *state)
{
*dest = xnode[-1];
return xnode - 2;
}
static const int *Expr_Tag(int *dest, const int *xnode, FXlatExprState *state)
{
*dest = state->tag;
state->bIsConstant = false;
return xnode - 1;
}
static const int *Expr_Add(int *dest, const int *xnode, FXlatExprState *state)
{
int op1, op2;
xnode = XlatExprEval[xnode[-1]](&op2, xnode-1, state);
xnode = XlatExprEval[xnode[0]](&op1, xnode, state);
*dest = op1 + op2;
return xnode;
}
static const int *Expr_Sub(int *dest, const int *xnode, FXlatExprState *state)
{
int op1, op2;
xnode = XlatExprEval[xnode[-1]](&op2, xnode-1, state);
xnode = XlatExprEval[xnode[0]](&op1, xnode, state);
*dest = op1 - op2;
return xnode;
}
static const int *Expr_Mul(int *dest, const int *xnode, FXlatExprState *state)
{
int op1, op2;
xnode = XlatExprEval[xnode[-1]](&op2, xnode-1, state);
xnode = XlatExprEval[xnode[0]](&op1, xnode, state);
*dest = op1 * op2;
return xnode;
}
static void Div0Check(int &op1, int &op2, const FXlatExprState *state)
{
if (op2 == 0)
{
Printf("Xlat: Division by 0 for line type %d\n", state->linetype);
// Set some safe values
op1 = 0;
op2 = 1;
}
}
static const int *Expr_Div(int *dest, const int *xnode, FXlatExprState *state)
{
int op1, op2;
xnode = XlatExprEval[xnode[-1]](&op2, xnode-1, state);
xnode = XlatExprEval[xnode[0]](&op1, xnode, state);
Div0Check(op1, op2, state);
*dest = op1 / op2;
return xnode;
}
static const int *Expr_Mod(int *dest, const int *xnode, FXlatExprState *state)
{
int op1, op2;
xnode = XlatExprEval[xnode[-1]](&op2, xnode-1, state);
xnode = XlatExprEval[xnode[0]](&op1, xnode, state);
Div0Check(op1, op2, state);
*dest = op1 % op2;
return xnode;
}
static const int *Expr_And(int *dest, const int *xnode, FXlatExprState *state)
{
int op1, op2;
xnode = XlatExprEval[xnode[-1]](&op2, xnode-1, state);
xnode = XlatExprEval[xnode[0]](&op1, xnode, state);
*dest = op1 & op2;
return xnode;
}
static const int *Expr_Or(int *dest, const int *xnode, FXlatExprState *state)
{
int op1, op2;
xnode = XlatExprEval[xnode[-1]](&op2, xnode-1, state);
xnode = XlatExprEval[xnode[0]](&op1, xnode, state);
*dest = op1 | op2;
return xnode;
}
static const int *Expr_Xor(int *dest, const int *xnode, FXlatExprState *state)
{
int op1, op2;
xnode = XlatExprEval[xnode[-1]](&op2, xnode-1, state);
xnode = XlatExprEval[xnode[0]](&op1, xnode, state);
*dest = op1 ^ op2;
return xnode;
}
static const int *Expr_Neg(int *dest, const int *xnode, FXlatExprState *state)
{
int op;
xnode = XlatExprEval[xnode[-1]](&op, xnode-1, state);
*dest = -op;
return xnode;
}
const int* (*XlatExprEval[XEXP_COUNT])(int *dest, const int *xnode, FXlatExprState *state) =
{
Expr_Const,
Expr_Tag,
Expr_Add,
Expr_Sub,
Expr_Mul,
Expr_Div,
Expr_Mod,
Expr_And,
Expr_Or,
Expr_Xor,
Expr_Neg
};
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