| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2002 Ben Parnell |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
| 21 | #include <string.h> |
| 22 | #include <stdlib.h> |
| 23 | |
| 24 | #include "share.h" |
| 25 | |
| 26 | typedef struct { |
| 27 | uint32 mzx,mzy,mzb; |
| 28 | int zap_readbit; |
| 29 | int bogo; |
| 30 | uint32 colok; |
| 31 | uint32 coloklast; |
| 32 | } ZAPPER; |
| 33 | |
| 34 | static ZAPPER ZD; |
| 35 | |
| 36 | static void FP_FASTAPASS(2) ZapperThingy(uint8 *buf, int line) |
| 37 | { |
| 38 | int mzx=ZD.mzx; |
| 39 | |
| 40 | if(line==0) ZD.colok=1<<16; /* Disable it. */ |
| 41 | ZD.coloklast=ZD.colok; |
| 42 | |
| 43 | if((line>=ZD.mzy-3 && line<=ZD.mzy+3) && mzx<256) |
| 44 | { |
| 45 | int a,sum,x; |
| 46 | |
| 47 | for(x=-4;x<4;x++) |
| 48 | { |
| 49 | if((mzx+x)<0 || (mzx+x)>255) continue; |
| 50 | a=buf[mzx+x]&63; |
| 51 | sum=palo[a].r+palo[a].g+palo[a].b; |
| 52 | |
| 53 | if(sum>=100*3) |
| 54 | { |
| 55 | ZD.colok=timestamp+mzx/3; |
| 56 | break; |
| 57 | } |
| 58 | } |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | static INLINE int CheckColor(void) |
| 63 | { |
| 64 | if( (timestamp>=ZD.coloklast && timestamp<=(ZD.coloklast+10)) || |
| 65 | (timestamp>=ZD.colok && timestamp<=(ZD.colok+10)) ) |
| 66 | return 0; |
| 67 | return 1; |
| 68 | } |
| 69 | |
| 70 | static uint8 FP_FASTAPASS(2) ReadZapper(int w, uint8 ret) |
| 71 | { |
| 72 | if(w) |
| 73 | { |
| 74 | ret&=~0x18; |
| 75 | if(ZD.bogo) |
| 76 | ret|=0x10; |
| 77 | if(CheckColor()) |
| 78 | ret|=0x8; |
| 79 | } |
| 80 | else |
| 81 | { |
| 82 | //printf("Kayo: %d\n",ZD.zap_readbit); |
| 83 | ret&=~2; |
| 84 | //if(ZD.zap_readbit==4) ret|=ZD.mzb&2; |
| 85 | ret|=(ret&1)<<1; |
| 86 | //ZD.zap_readbit++; |
| 87 | } |
| 88 | return ret; |
| 89 | } |
| 90 | |
| 91 | static void FP_FASTAPASS(2) DrawZapper(uint8 *buf, int arg) |
| 92 | { |
| 93 | if(arg) |
| 94 | FCEU_DrawCursor(buf, ZD.mzx, ZD.mzy); |
| 95 | } |
| 96 | |
| 97 | static void FP_FASTAPASS(2) UpdateZapper(void *data, int arg) |
| 98 | { |
| 99 | uint32 *ptr=data; |
| 100 | |
| 101 | if(ZD.bogo) |
| 102 | ZD.bogo--; |
| 103 | if(ptr[2]&1 && (!(ZD.mzb&1))) |
| 104 | ZD.bogo=5; |
| 105 | |
| 106 | ZD.mzx=ptr[0]; |
| 107 | ZD.mzy=ptr[1]; |
| 108 | ZD.mzb=ptr[2]; |
| 109 | |
| 110 | if(ZD.mzx>=256 || ZD.mzy>=240) |
| 111 | ZD.colok=0; |
| 112 | } |
| 113 | |
| 114 | static void StrobeShadow(void) |
| 115 | { |
| 116 | ZD.zap_readbit=0; |
| 117 | } |
| 118 | |
| 119 | static INPUTCFC SHADOWC={ReadZapper,0,StrobeShadow,UpdateZapper,ZapperThingy,DrawZapper}; |
| 120 | |
| 121 | INPUTCFC *FCEU_InitSpaceShadow(void) |
| 122 | { |
| 123 | memset(&ZD,0,sizeof(ZAPPER)); |
| 124 | return(&SHADOWC); |
| 125 | } |
| 126 | |
| 127 | |