ws_cruncher.h

/* 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef M4_WSCRIPT_WS_CRUNCHER_H
#define M4_WSCRIPT_WS_CRUNCHER_H

#include "m4/m4_types.h"
#include "m4/wscript/ws_machine.h"

namespace M4 {

#define OP_INSTR            0xfe000000
#define OP_FORMAT1          0x01c00000
#define OP_FORMAT2          0x00380000
#define OP_FORMAT3          0x00070000
#define OP_HIGH_DATA        0xffff0000
#define OP_LOW_DATA         0x0000ffff
#define OP_DATA_SIGN        0x8000
#define OP_DATA_VALUE       0x7fff

#define FMT_NOTHING         0
#define FMT_LOCAL_SRC       1
#define FMT_GLOBAL_SRC      2
#define FMT_INT15           3
#define FMT_4_11            4
#define FMT_7_8             5
#define FMT_11_4            6
#define FMT_15_0            7
#define REG_SET_IDX         0x0fff
#define REG_SET_IDX_REG     0x8000
#define LOCAL_FMT           0x7000
#define LOCAL_FMT_PARENT    0x0000
#define LOCAL_FMT_REG       0x1000
#define LOCAL_FMT_DATA      0x2000

#define BRANCH_BR           0
#define BRANCH_BLT          1
#define BRANCH_BLE          2
#define BRANCH_BE           3
#define BRANCH_BNE          4
#define BRANCH_BGE          5
#define BRANCH_BGT          6

struct EOSreq {
    EOSreq *next = nullptr;
    EOSreq *prev = nullptr;
    Anim8 *myAnim8 = nullptr;
};

struct cruncher {
    Anim8 *backLayerAnim8;
    Anim8 *frontLayerAnim8;
    Anim8 *firstAnim8ToCrunch;
    Anim8 *lastAnim8ToCrunch;
};

struct WSCruncher_Globals {
    cruncher *_myCruncher = nullptr;
    bool _cruncherInitialized = false;
    EOSreq *_EOSreqList = nullptr;
    int32 _memtypeEOS = -1;

    int32 _stackSize = 0;
    uint32 *_stackBase = nullptr;
    uint32 *_stackTop = nullptr;
    uint32 *_stackLimit = nullptr;
    Anim8 *_crunchNext = nullptr;

    // OPCODE PROCESSING GLOBALS
    int16 *_myDepthTable = nullptr;

    frac16 _dataArg1 = 0;
    frac16 _dataArg2 = 0;
    frac16 _dataArg3 = 0;
    frac16 *_myArg1 = nullptr;
    frac16 *_myArg2 = nullptr;
    frac16 *_myArg3 = nullptr;

    bool _keepProcessing = false, _terminated = false, _mapTheCel = false;
    bool _bailOut = false;
    int32 _compareCCR = 0;
    int32 _indexReg = 0;
    int32 _pcOffsetOld = 0;
};

int32 *ws_GetDataFormats();
bool ws_InitCruncher();
void ws_KillCruncher();

Anim8 *ws_AddAnim8ToCruncher(machine *m, int32 sequHash);

bool ws_ChangeAnim8Program(machine *m, int32 newSequHash);

void ws_RemoveAnim8FromCruncher(Anim8 *myAnim8);

bool ws_PauseAnim8(Anim8 *myAnim8);
bool ws_ResumeAnim8(Anim8 *myAnim8);

int32 ws_PreProcessPcode(uint32 **PC, Anim8 *myAnim8);

void ws_CrunchAnim8s(int16 *depth_table);
void ws_CrunchEOSreqs();
bool ws_OnEndSeqRequest(Anim8 *myAnim8, int32 pcOffset, int32 pcCount);
void ws_CancelOnEndSeq(Anim8 *myAnim8);

} // End of namespace M4

#endif