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[2]; |
35 | |
36 | static void FP_FASTAPASS(3) ZapperThingy(int w, uint8 *buf, int line) |
37 | { |
38 | int mzx=ZD[w].mzx; |
39 | |
40 | if(line==0) ZD[w].colok=1<<16; /* Disable it. */ |
41 | |
42 | ZD[w].coloklast=ZD[w].colok; |
43 | |
44 | if(ZD[w].mzb&2) return; |
45 | if((line>=ZD[w].mzy-3 && line<=ZD[w].mzy+3) && mzx<256) |
46 | { |
47 | int a,sum,x; |
48 | |
49 | for(x=-4;x<4;x++) |
50 | { |
51 | if((mzx+x)<0 || (mzx+x)>255) continue; |
52 | a=buf[mzx+x]&63; |
53 | sum=palo[a].r+palo[a].g+palo[a].b; |
54 | |
55 | if(sum>=100*3) |
56 | { |
57 | ZD[w].colok=timestamp+mzx/3; |
58 | break; |
59 | } |
60 | } |
61 | } |
62 | |
63 | } |
64 | |
65 | static INLINE int CheckColor(int w) |
66 | { |
67 | if( (timestamp>=ZD[w].coloklast && timestamp<=(ZD[w].coloklast+100)) || |
68 | (timestamp>=ZD[w].colok && timestamp<=(ZD[w].colok+100)) ) |
69 | return 0; |
70 | return 1; |
71 | } |
72 | |
73 | static uint8 FP_FASTAPASS(1) ReadZapperVS(int w) |
74 | { |
75 | uint8 ret=0; |
76 | |
77 | if(ZD[w].zap_readbit==4) ret=1; |
78 | |
79 | if(ZD[w].zap_readbit==7) |
80 | { |
81 | if(ZD[w].bogo) |
82 | ret|=0x1; |
83 | } |
84 | if(ZD[w].zap_readbit==6) |
85 | { |
86 | if(!CheckColor(w)) |
87 | ret|=0x1; |
88 | } |
89 | ZD[w].zap_readbit++; |
90 | return ret; |
91 | } |
92 | |
93 | static void FP_FASTAPASS(1) StrobeZapperVS(int w) |
94 | { |
95 | ZD[w].zap_readbit=0; |
96 | } |
97 | |
98 | static uint8 FP_FASTAPASS(1) ReadZapper(int w) |
99 | { |
100 | uint8 ret=0; |
101 | if(ZD[w].bogo) |
102 | ret|=0x10; |
103 | if(CheckColor(w)) |
104 | ret|=0x8; |
105 | return ret; |
106 | } |
107 | |
108 | static void FASTAPASS(3) DrawZapper(int w, uint8 *buf, int arg) |
109 | { |
110 | if(arg) |
111 | FCEU_DrawCursor(buf, ZD[w].mzx,ZD[w].mzy); |
112 | } |
113 | |
114 | static void FP_FASTAPASS(3) UpdateZapper(int w, void *data, int arg) |
115 | { |
116 | uint32 *ptr=data; |
117 | |
118 | if(ZD[w].bogo) |
119 | ZD[w].bogo--; |
120 | if(ptr[2]&3 && (!(ZD[w].mzb&3))) |
121 | ZD[w].bogo=5; |
122 | |
123 | ZD[w].mzx=ptr[0]; |
124 | ZD[w].mzy=ptr[1]; |
125 | ZD[w].mzb=ptr[2]; |
126 | |
127 | if(ZD[w].mzb&2 || ZD[w].mzx>=256 || ZD[w].mzy>=240) |
128 | ZD[w].colok=0; |
129 | } |
130 | |
131 | static INPUTC ZAPC={ReadZapper,0,0,UpdateZapper,ZapperThingy,DrawZapper}; |
132 | static INPUTC ZAPVSC={ReadZapperVS,0,StrobeZapperVS,UpdateZapper,ZapperThingy,DrawZapper}; |
133 | |
134 | INPUTC *FCEU_InitZapper(int w) |
135 | { |
136 | memset(&ZD[w],0,sizeof(ZAPPER)); |
137 | if(FCEUGameInfo.type==GIT_VSUNI) |
138 | return(&ZAPVSC); |
139 | else |
140 | return(&ZAPC); |
141 | } |
142 | |
143 | |