frontend/in_tsbutton.c

   1 /*
   2  * (C) Gražvydas "notaz" Ignotas, 2011
   3  *
   4  * This work is licensed under the terms of any of these licenses
   5  * (at your option):
   6  *  - GNU GPL, version 2 or later.
   7  *  - GNU LGPL, version 2.1 or later.
   8  * See the COPYING file in the top-level directory.
   9  */
  10
  11 #include <stdio.h>
  12 #include <tslib.h>
  13
  14 #include "common/input.h"
  15 #include "pl_gun_ts.h"
  16 #include "in_tsbutton.h"
  17
  18 #define IN_TSBUTTON_PREFIX "tsbutton:"
  19 #define IN_TSBUTTON_COUNT 4
  20 static int tsbutton_down_id;
  21 static int last_tsbutton_id;
  22
  23 #define TS_WIDTH 320
  24 #define TS_HEIGHT 240
  25
  26 // HACK: stealing this from plugin_lib
  27 extern void *tsdev;
  28
  29 static const char * const in_tsbutton_keys[IN_TSBUTTON_COUNT] = {
  30         "TS1", "TS2", "TS3", "TS4",
  31 };
  32
  33 static void in_tsbutton_probe(void)
  34 {
  35         struct tsdev *dev = tsdev;
  36         if (dev == NULL) {
  37                 fprintf(stderr, "in_tsbutton_probe: missing tsdev\n");
  38                 return;
  39         }
  40
  41         in_register(IN_TSBUTTON_PREFIX "touchscreen as buttons",
  42                 pl_gun_ts_get_fd(dev), NULL, IN_TSBUTTON_COUNT, in_tsbutton_keys, 0);
  43 }
  44
  45 static const char * const *
  46 in_tsbutton_get_key_names(int *count)
  47 {
  48         *count = IN_TSBUTTON_COUNT;
  49         return in_tsbutton_keys;
  50 }
  51
  52 static int update_button(void)
  53 {
  54         struct tsdev *dev = tsdev;
  55         int sx = 0, sy = 0, sp = 0;
  56
  57         if (dev == NULL)
  58                 return -1;
  59
  60         if (pl_gun_ts_update_raw(dev, &sx, &sy, &sp)) {
  61                 if (sp == 0)
  62                         tsbutton_down_id = -1;
  63                 else {
  64                         // 0 1
  65                         // 2 3
  66                         tsbutton_down_id = 0;
  67                         if (sx > TS_WIDTH / 2)
  68                                 tsbutton_down_id++;
  69                         if (sy > TS_HEIGHT / 2)
  70                                 tsbutton_down_id += 2;
  71                 }
  72         }
  73
  74         return 0;
  75 }
  76
  77 static int in_tsbutton_update(void *drv_data, const int *binds, int *result)
  78 {
  79         int ret, t;
  80
  81         ret = update_button();
  82         if (ret != 0)
  83                 return ret;
  84
  85         if (tsbutton_down_id >= 0)
  86                 for (t = 0; t < IN_BINDTYPE_COUNT; t++)
  87                         result[t] |= binds[IN_BIND_OFFS(tsbutton_down_id, t)];
  88
  89         return 0;
  90 }
  91
  92 static int in_tsbutton_update_keycode(void *data, int *is_down)
  93 {
  94         int ret, ret_kc = -1, ret_down = 0;
  95
  96         ret = update_button();
  97         if (ret != 0)
  98                 return ret;
  99
 100         if (tsbutton_down_id == last_tsbutton_id)
 101                 return -1;
 102
 103         if (tsbutton_down_id >= 0) {
 104                 if (last_tsbutton_id >= 0) {
 105                         ret_kc = last_tsbutton_id;
 106                         last_tsbutton_id = -1;
 107                 }
 108                 else {
 109                         ret_down = 1;
 110                         ret_kc = tsbutton_down_id;
 111                         last_tsbutton_id = tsbutton_down_id;
 112                 }
 113         }
 114         else {
 115                 ret_kc = last_tsbutton_id;
 116                 last_tsbutton_id = -1;
 117         }
 118
 119         if (is_down != NULL)
 120                 *is_down = ret_down;
 121
 122         return ret_kc;
 123 }
 124
 125 static const in_drv_t in_tsbutton_drv = {
 126         .prefix         = IN_TSBUTTON_PREFIX,
 127         .probe          = in_tsbutton_probe,
 128         .get_key_names  = in_tsbutton_get_key_names,
 129         .update         = in_tsbutton_update,
 130         .update_keycode = in_tsbutton_update_keycode,
 131 };
 132
 133 void in_tsbutton_init(void)
 134 {
 135         tsbutton_down_id = last_tsbutton_id = -1;
 136         in_register_driver(&in_tsbutton_drv);
 137 }
 138