c62d2810 |
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 | |