input.c

   1 /*
   2  * Acess2 GUI (AxWin) Version 3
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * input.c
   6  * - Input abstraction
   7  */
   8 #include <common.h>
   9 #include <acess/sys.h>
  10
  11 // TODO: Move out to a common header
  12 typedef struct
  13 {
  14         int Num;
  15         int Value;
  16 } tNumValue;
  17 #define JOY_IOCTL_GETSETAXISLIMIT       6
  18 #define JOY_IOCTL_GETSETAXISPOSITION    7
  19
  20 // === IMPORTS ===
  21 extern void     Video_SetCursorPos(short X, short Y);
  22 extern void     WM_Input_MouseMoved(int OldX, int OldY, int NewX, int NewY);
  23 extern void     WM_Input_MouseButton(int X, int Y, int Button, int Pressed);
  24 const char      *gsMouseDevice;
  25 extern int      giTerminalFD;
  26 extern int      giScreenWidth;
  27 extern int      giScreenHeight;
  28
  29 // === GLOBALS ===
  30  int    giMouseFD;
  31  int    giInput_MouseButtonState;
  32  int    giInput_MouseX, giInput_MouseY;
  33
  34 // === CODE ===
  35 int Input_Init(void)
  36 {
  37         tNumValue       num_value;
  38
  39         // Open mouse for RW
  40         giMouseFD = open(gsMouseDevice, 3);
  41
  42         // Set mouse limits
  43         // TODO: Update these if the screen resolution changes
  44         num_value.Num = 0;      num_value.Value = giScreenWidth;
  45         ioctl(giMouseFD, JOY_IOCTL_GETSETAXISLIMIT, &num_value);
  46         num_value.Value = giScreenWidth/2;
  47         giInput_MouseX = giScreenWidth/2;
  48         ioctl(giMouseFD, JOY_IOCTL_GETSETAXISPOSITION, &num_value);
  49
  50         num_value.Num = 1;      num_value.Value = giScreenHeight;
  51         ioctl(giMouseFD, JOY_IOCTL_GETSETAXISLIMIT, &num_value);
  52         num_value.Value = giScreenHeight/2;
  53         giInput_MouseY = giScreenHeight/2;
  54         ioctl(giMouseFD, JOY_IOCTL_GETSETAXISPOSITION, &num_value);
  55
  56         return 0;
  57 }
  58
  59 void Input_FillSelect(int *nfds, fd_set *set)
  60 {
  61         if(*nfds < giTerminalFD)        *nfds = giTerminalFD;
  62         if(*nfds < giMouseFD)   *nfds = giMouseFD;
  63         FD_SET(giTerminalFD, set);
  64         FD_SET(giMouseFD, set);
  65 }
  66
  67 void Input_HandleSelect(fd_set *set)
  68 {
  69         if(FD_ISSET(giTerminalFD, set))
  70         {
  71                 uint32_t        codepoint;
  72                 if( read(giTerminalFD, &codepoint, sizeof(codepoint)) != sizeof(codepoint) )
  73                 {
  74                         // oops, error
  75                 }
  76                 // TODO: pass on to message handler
  77                 _SysDebug("Keypress 0x%x", codepoint);
  78         }
  79
  80         if(FD_ISSET(giMouseFD, set))
  81         {
  82                  int    i;
  83                 struct sMouseInfo {
  84                         uint16_t        NAxies;
  85                         uint16_t        NButtons;
  86                         struct sMouseAxis {
  87                                  int16_t        MinValue;
  88                                  int16_t        MaxValue;
  89                                  int16_t        CurValue;
  90                                 uint16_t        CursorPos;
  91                         }       Axies[2];
  92                         uint8_t Buttons[3];
  93                 }       mouseinfo;
  94
  95                 seek(giMouseFD, 0, SEEK_SET);
  96                 if( read(giMouseFD, &mouseinfo, sizeof(mouseinfo)) != sizeof(mouseinfo) )
  97                 {
  98                         // Not a 3 button mouse, oops
  99                         return ;
 100                 }
 101
 102                 // Handle movement
 103                 Video_SetCursorPos( mouseinfo.Axies[0].CursorPos, mouseinfo.Axies[1].CursorPos );
 104
 105                 WM_Input_MouseMoved(
 106                         giInput_MouseX, giInput_MouseY,
 107                         mouseinfo.Axies[0].CursorPos, mouseinfo.Axies[1].CursorPos
 108                         );
 109                 giInput_MouseX = mouseinfo.Axies[0].CursorPos;
 110                 giInput_MouseY = mouseinfo.Axies[1].CursorPos;
 111
 112                 for( i = 0; i < mouseinfo.NButtons; i ++ )
 113                 {
 114                         int bit = 1 << i;
 115                         int cur = mouseinfo.Buttons[i] > 128;
 116
 117                         if( !!(giInput_MouseButtonState & bit) != cur )
 118                         {
 119                                 WM_Input_MouseButton(giInput_MouseX, giInput_MouseY, i, cur);
 120                                 // Flip button state
 121                                 giInput_MouseButtonState ^= bit;
 122                         }
 123                 }
 124         }
 125 }