dos/input.c

   1 #include "globals.h"
   2
   3 static int num_mouse_buttons;
   4
   5 int init_joy(void)
   6 {
   7         int c1;
   8
   9         outportb(0x201, 0);
  10         while (c1 < 0x7fff) {
  11                 if ((inportb(0x201) & 1) == 0)
  12                         break;
  13                 c1++;
  14         }
  15         if (c1 != 0x7fff)
  16                 return 1;
  17         else
  18                 return 0;
  19 }
  20
  21
  22 void read_joy(void)
  23 {
  24         int c1;
  25         int x, y;
  26         int s1 = 0;
  27         char flag;
  28
  29         c1 = x = y = flag = 0;
  30         outportb(0x201, 0);
  31
  32         while (1) {
  33
  34                 s1 = inportb(0x201);
  35
  36                 if (x == 0) {
  37                         if ((s1 & 1) == 0)
  38                                 x = c1;
  39                 }
  40                 if (y == 0) {
  41                         if ((s1 & 2) == 0)
  42                                 y = c1;
  43                 }
  44                 if (x != 0 && y != 0)
  45                         break;
  46
  47                 c1++;
  48                 if (c1 == 0x7fff) {
  49                         flag = 1;
  50                         break;
  51                 }
  52
  53         }
  54
  55         if (flag == 0) {
  56                 joy.raw_x = x;
  57                 joy.raw_y = y;
  58
  59                 if (joy.raw_x < joy.calib_data.x2)
  60                         joy.x = ((long) (joy.raw_x - joy.calib_data.x2) << 10) / (joy.calib_data.x2 - joy.calib_data.x1);
  61                 else
  62                         joy.x = ((long) (joy.raw_x - joy.calib_data.x2) << 10) / (joy.calib_data.x3 - joy.calib_data.x2);
  63                 if (joy.raw_y < joy.calib_data.y2)
  64                         joy.y = ((long) (joy.raw_y - joy.calib_data.y2) << 10) / (joy.calib_data.y2 - joy.calib_data.y1);
  65                 else
  66                         joy.y = ((long) (joy.raw_y - joy.calib_data.y2) << 10) / (joy.calib_data.y3 - joy.calib_data.y2);
  67
  68                 if (joy.x < -1024)
  69                         joy.x = -1024;
  70                 if (joy.x > 1024)
  71                         joy.x = 1024;
  72                 if (joy.y < -1024)
  73                         joy.y = -1024;
  74                 if (joy.y > 1024)
  75                         joy.y = 1024;
  76
  77                 s1 = inportb(0x201);
  78                 joy.but1 = (((s1 >> 4) & 1) ^ 1);
  79                 joy.but2 = (((s1 >> 5) & 1) ^ 1);
  80         } else {
  81                 joy.raw_x = joy.calib_data.x2;
  82                 joy.raw_y = joy.calib_data.y2;
  83
  84                 joy.x = joy.y = 0;
  85
  86                 joy.but1 = joy.but2 = 0;
  87         }
  88
  89 }
  90
  91
  92 int calib_joy(int type)
  93 {
  94         int c1;
  95         int x, y;
  96         int s1 = 0;
  97         int num_times;
  98         char flag = 0;
  99
 100         while (joy.but1 == 1) {
 101                 s1 = inportb(0x201);
 102                 joy.but1 = (((s1 >> 4) & 1) ^ 1);
 103                 if (key_pressed(1) == 1) {
 104                         while (key_pressed(1) == 1);
 105                         return 1;
 106                 }
 107         }
 108
 109         num_times = 0;
 110
 111         while (joy.but1 == 0) {
 112
 113                 c1 = x = y = flag = 0;
 114                 outportb(0x201, 0);
 115
 116                 while (1) {
 117
 118                         s1 = inportb(0x201);
 119
 120                         if (x == 0) {
 121                                 if ((s1 & 1) == 0)
 122                                         x = c1;
 123                         }
 124                         if (y == 0) {
 125                                 if ((s1 & 2) == 0)
 126                                         y = c1;
 127                         }
 128                         if (x != 0 && y != 0)
 129                                 break;
 130
 131                         c1++;
 132                         if (c1 == 0x7fff) {
 133                                 flag = 1;
 134                                 break;
 135                         }
 136
 137                 }
 138
 139                 joy.raw_x = x;
 140                 joy.raw_y = y;
 141
 142                 s1 = inportb(0x201);
 143                 joy.but1 = (((s1 >> 4) & 1) ^ 1);
 144
 145                 if (num_times < 0x7fffffff)
 146                         num_times++;
 147
 148                 if (flag == 1)
 149                         break;
 150
 151                 if (key_pressed(1) == 1) {
 152                         while (key_pressed(1) == 1);
 153                         return 1;
 154                 }
 155
 156         }
 157
 158         if (num_times < 16)
 159                 return 1;
 160
 161         if (flag == 0) {
 162
 163                 switch (type) {
 164                 case 0:
 165                         joy.calib_data.x1 = joy.raw_x;
 166                         joy.calib_data.y1 = joy.raw_y;
 167                         break;
 168                 case 1:
 169                         joy.calib_data.x3 = joy.raw_x;
 170                         joy.calib_data.y3 = joy.raw_y;
 171                         break;
 172                 case 2:
 173                         joy.calib_data.x2 = joy.raw_x;
 174                         joy.calib_data.y2 = joy.raw_y;
 175                         break;
 176                 }
 177
 178                 while (joy.but1 == 1) {
 179                         s1 = inportb(0x201);
 180                         joy.but1 = (((s1 >> 4) & 1) ^ 1);
 181                 }
 182
 183         }
 184
 185         return 0;
 186
 187 }
 188
 189
 190 int init_mouse(int *_num_buttons)
 191 {
 192         __dpmi_regs regs;
 193         int mouse_enabled, num_mouse_buttons;
 194
 195         regs.x.ax = 0;
 196         __dpmi_int(0x33, &regs);
 197         if (regs.x.ax == 0xffff) {
 198                 mouse_enabled = 1;
 199                 num_mouse_buttons = regs.x.bx;
 200                 if (force2 == 1)
 201                         num_mouse_buttons = 2;
 202                 if (force3 == 1)
 203                         num_mouse_buttons = 3;
 204         } else {
 205                 mouse_enabled = 0;
 206         }
 207         if (_num_buttons)
 208                 _num_buttons = num_mouse_buttons;
 209
 210         return mouse_enabled;
 211 }
 212
 213
 214 void read_mouse(void)
 215 {
 216
 217         regs.x.ax = 3;
 218         __dpmi_int(0x33, &regs);
 219         mouse.but1 = regs.x.bx & 1;
 220         mouse.but2 = (regs.x.bx & 2) >> 1;
 221         mouse.but3 = (regs.x.bx & 4) >> 2;
 222
 223 }
 224
 225
 226 void update_player_actions(void)
 227 {
 228         if (main_info.mouse_enabled == 1)
 229                 read_mouse();
 230         if (main_info.joy_enabled == 1)
 231                 read_joy();
 232         player[0].action_left   = key_pressed(KEY_PL1_LEFT) == 1;
 233         player[0].action_right  = key_pressed(KEY_PL1_RIGHT) == 1;
 234         player[0].action_up     = key_pressed(KEY_PL1_JUMP) == 1;
 235         player[1].action_left   = key_pressed(KEY_PL2_LEFT) == 1;
 236         player[1].action_right  = key_pressed(KEY_PL2_RIGHT) == 1;
 237         player[1].action_up     = key_pressed(KEY_PL2_JUMP) == 1;
 238         player[2].action_left   = key_pressed(KEY_PL3_LEFT) == 1;
 239         player[2].action_right  = key_pressed(KEY_PL3_RIGHT) == 1;
 240         player[2].action_up     = key_pressed(KEY_PL3_JUMP) == 1;
 241         player[3].action_left   = key_pressed(KEY_PL4_LEFT) == 1;
 242         player[3].action_right  = key_pressed(KEY_PL4_RIGHT) == 1;
 243         player[3].action_up     = key_pressed(KEY_PL4_JUMP) == 1;
 244 }
 245
 246
 247 void init_inputs(void)
 248 {
 249         main_info.mouse_enabled = init_mouse(&num_mouse_buttons);
 250         main_info.joy_enabled = init_joy(&num_mouse_buttons);
 251 }
 252