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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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; either version 2
* of the License, or (at your option) any later version.
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
* Virtual processor definitions
*/
#ifndef TINSEL_PCODE_H // prevent multiple includes
#define TINSEL_PCODE_H
#include "tinsel/events.h" // for TINSEL_EVENT
#include "tinsel/sched.h" // for PROCESS
namespace Common {
class Serializer;
}
namespace Tinsel {
// forward declaration
struct INV_OBJECT;
enum RESUME_STATE {
RES_NOT, RES_1, RES_2
};
enum {
PCODE_STACK_SIZE = 128 //!< interpeters stack size
};
enum GSORT {
GS_NONE, GS_ACTOR, GS_MASTER, GS_POLYGON, GS_INVENTORY, GS_SCENE,
GS_PROCESS, GS_GPROCESS
};
enum RESCODE {RES_WAITING, RES_FINISHED, RES_CUTSHORT};
// The following structure is used to introduce bug fixes into the scripts used by the games
struct WorkaroundEntry {
TinselEngineVersion version;
bool scnFlag; // Only applicable for Tinsel 1 (DW 1)
SCNHANDLE hCode; // Script to apply fragment to
int ip; // Script offset to run this fragment before
int numBytes; // Number of bytes in the script
const byte *script; // Instruction(s) to execute
};
struct INT_CONTEXT {
// Elements for interpret context management
PROCESS *pProc; //!< processes owning this context
GSORT GSort; //!< sort of this context
// Previously parameters to Interpret()
SCNHANDLE hCode; //!< scene handle of the code to execute
byte *code; //!< pointer to the code to execute
TINSEL_EVENT event; //!< causal event
HPOLYGON hPoly; //!< associated polygon (if any)
int idActor; //!< associated actor (if any)
INV_OBJECT *pinvo; //!< associated inventory object
// Previously local variables in Interpret()
int32 stack[PCODE_STACK_SIZE]; //!< interpeters run time stack
int sp; //!< stack pointer
int bp; //!< base pointer
int ip; //!< instruction pointer
bool bHalt; //!< set to exit interpeter
bool escOn;
int myEscape; //!< only initialised to prevent compiler warning!
uint32 waitNumber1; // The waiting numbert
uint32 waitNumber2; // The wait for number
RESCODE resumeCode;
RESUME_STATE resumeState;
// Used to store execution state within a script workaround fragment
const WorkaroundEntry *fragmentPtr;
void syncWithSerializer(Common::Serializer &s);
};
typedef INT_CONTEXT *PINT_CONTEXT;
/*----------------------------------------------------------------------*\
|* Interpreter Function Prototypes *|
\*----------------------------------------------------------------------*/
// Interprets the PCODE instructions in the code array
void Interpret(CORO_PARAM, INT_CONTEXT *ic);
INT_CONTEXT *InitInterpretContext(
GSORT gsort,
SCNHANDLE hCode, // code to execute
TINSEL_EVENT event, // causal event
HPOLYGON hpoly, // associated polygon (if any)
int actorid, // associated actor (if any)
INV_OBJECT *pinvo,
int myEscape = -1); // associated inventory object
INT_CONTEXT *RestoreInterpretContext(INT_CONTEXT *ric);
void FreeMostInterpretContexts(void);
void FreeMasterInterpretContext(void);
void SaveInterpretContexts(INT_CONTEXT *sICInfo);
void RegisterGlobals(int num);
void FreeGlobals(void);
void AttachInterpret(INT_CONTEXT *pic, PROCESS *pProc);
void WaitInterpret(CORO_PARAM, PPROCESS pWaitProc, bool *result);
#define NUM_INTERPRET (NUM_PROCESS - 20)
#define MAX_INTERPRET (MAX_PROCESSES - 20)
/*----------------------------------------------------------------------*\
|* Library Procedure and Function codes parameter enums *|
\*----------------------------------------------------------------------*/
#define TAG_DEF 0 // For tagactor()
#define TAG_Q1TO3 1 // tag types
#define TAG_Q1TO4 2 // tag types
#define CONV_DEF 0 //
#define CONV_BOTTOM 1 // conversation() parameter
#define CONV_END 2 //
#define CONTROL_OFF 0 // control()
#define CONTROL_ON 1 // parameter
#define CONTROL_OFFV 2 //
#define CONTROL_OFFV2 3 //
#define CONTROL_STARTOFF 4 //
#define NULL_ACTOR (-1) // For actor parameters
#define LEAD_ACTOR (-2) //
#define RAND_NORM 0 // For random() frills
#define RAND_NORPT 1 //
#define D_UP 1
#define D_DOWN 0
#define TW_START 1 // topwindow() parameter
#define TW_END 2 //
#define MIDI_DEF 0
#define MIDI_LOOP 1
#define FM_IN 0 //
#define FM_OUT 1 // fademidi()
#define FG_ON 0 //
#define FG_OFF 1 // FrameGrab()
#define ST_ON 0 //
#define ST_OFF 1 // SubTitles()
} // end of namespace Tinsel
#endif // TINSEL_PCODE_H
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