152 lines
3.0 KiB
C
152 lines
3.0 KiB
C
/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2002 Xodnizel
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <string.h>
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#include <stdlib.h>
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#include "share.h"
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typedef struct {
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uint32 mzx,mzy,mzb;
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int zap_readbit;
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int bogo;
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int zappo;
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uint64 zaphit;
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} ZAPPER;
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static ZAPPER ZD;
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static void FP_FASTAPASS(3) ZapperFrapper(uint8 *bg, uint8 *spr, uint32 linets, int final)
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{
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int xs,xe;
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int zx,zy;
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if(!bg) // New line, so reset stuff.
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{
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ZD.zappo=0;
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return;
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}
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xs=ZD.zappo;
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xe=final;
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zx=ZD.mzx;
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zy=ZD.mzy;
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if(xe>256) xe=256;
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if(scanline>=(zy-4) && scanline<=(zy+4))
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{
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while(xs<xe)
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{
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uint8 a1,a2;
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uint32 sum;
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if(xs<=(zx+4) && xs>=(zx-4))
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{
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a1=bg[xs];
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if(spr)
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{
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a2=spr[xs];
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if(!(a2&0x80))
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if(!(a2&0x40) || (a1&64))
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a1=a2;
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}
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a1&=63;
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sum=palo[a1].r+palo[a1].g+palo[a1].b;
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if(sum>=100*3)
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{
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ZD.zaphit=((uint64)linets+(xs+16)*(PAL?15:16))/48+timestampbase;
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goto endo;
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}
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}
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xs++;
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}
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}
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endo:
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ZD.zappo=final;
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}
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static INLINE int CheckColor(void)
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{
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FCEUPPU_LineUpdate();
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if((ZD.zaphit+10)>=(timestampbase+timestamp)) return(0);
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return(1);
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}
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static uint8 FP_FASTAPASS(2) ReadZapper(int w, uint8 ret)
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{
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if(w)
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{
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ret&=~0x18;
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if(ZD.bogo)
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ret|=0x10;
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if(CheckColor())
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ret|=0x8;
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}
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else
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{
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//printf("Kayo: %d\n",ZD.zap_readbit);
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ret&=~2;
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//if(ZD.zap_readbit==4) ret|=ZD.mzb&2;
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ret|=(ret&1)<<1;
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//ZD.zap_readbit++;
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}
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return ret;
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}
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static void FP_FASTAPASS(2) DrawZapper(uint8 *buf, int arg)
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{
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if(arg)
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FCEU_DrawCursor(buf, ZD.mzx, ZD.mzy);
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}
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static void FP_FASTAPASS(2) UpdateZapper(void *data, int arg)
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{
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uint32 *ptr=(uint32*)data;
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if(ZD.bogo)
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ZD.bogo--;
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if(ptr[2]&1 && (!(ZD.mzb&1)))
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ZD.bogo=5;
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ZD.mzx=ptr[0];
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ZD.mzy=ptr[1];
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ZD.mzb=ptr[2];
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}
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static void StrobeShadow(void)
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{
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ZD.zap_readbit=0;
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}
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static INPUTCFC SHADOWC={ReadZapper,0,StrobeShadow,UpdateZapper,ZapperFrapper,DrawZapper};
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INPUTCFC *FCEU_InitSpaceShadow(void)
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{
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memset(&ZD,0,sizeof(ZAPPER));
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return(&SHADOWC);
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}
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