src/glut/glx/glut_joy.c

   1
   2 /* Copyright (c) Mark J. Kilgard, 1997, 1998. */
   3
   4 /* This program is freely distributable without licensing fees
   5    and is provided without guarantee or warrantee expressed or
   6    implied. This program is -not- in the public domain. */
   7
   8 #ifdef _WIN32
   9 #include <windows.h>
  10 #ifndef __CYGWIN32__
  11 #include <mmsystem.h>  /* Win32 Multimedia API header. */
  12 #endif
  13 #endif
  14
  15 #include "glutint.h"
  16
  17 /* CENTRY */
  18 void GLUTAPIENTRY
  19 glutJoystickFunc(GLUTjoystickCB joystickFunc, int pollInterval)
  20 {
  21 #ifdef _WIN32
  22   if (joystickFunc && (pollInterval > 0)) {
  23     if (__glutCurrentWindow->entryState == WM_SETFOCUS) {
  24       MMRESULT result;
  25
  26       /* Capture joystick focus if current window has
  27          focus now. */
  28       result = joySetCapture(__glutCurrentWindow->win,
  29         JOYSTICKID1, 0, TRUE);
  30       if (result == JOYERR_NOERROR) {
  31         (void) joySetThreshold(JOYSTICKID1, pollInterval);
  32       }
  33     }
  34     __glutCurrentWindow->joyPollInterval = pollInterval;
  35   } else {
  36     /* Release joystick focus if current window has
  37        focus now. */
  38     if (__glutCurrentWindow->joystick
  39       && (__glutCurrentWindow->joyPollInterval > 0)
  40       && (__glutCurrentWindow->entryState == WM_SETFOCUS)) {
  41       (void) joyReleaseCapture(JOYSTICKID1);
  42     }
  43     __glutCurrentWindow->joyPollInterval = 0;
  44   }
  45   __glutCurrentWindow->joystick = joystickFunc;
  46 #else
  47   /* XXX No support currently for X11 joysticks. */
  48 #endif
  49 }
  50
  51 void GLUTAPIENTRY
  52 glutForceJoystickFunc(void)
  53 {
  54 #ifdef _WIN32
  55   if (__glutCurrentWindow->joystick) {
  56     JOYINFOEX jix;
  57     MMRESULT res;
  58     int x, y, z;
  59
  60     /* Poll the joystick. */
  61     jix.dwSize = sizeof(jix);
  62     jix.dwFlags = JOY_RETURNALL;
  63     res = joyGetPosEx(JOYSTICKID1,&jix);
  64     if (res == JOYERR_NOERROR) {
  65
  66       /* Convert to int for scaling. */
  67       x = jix.dwXpos;
  68       y = jix.dwYpos;
  69       z = jix.dwZpos;
  70
  71 #define SCALE(v)  ((int) ((v - 32767)/32.768))
  72
  73       __glutCurrentWindow->joystick(jix.dwButtons,
  74         SCALE(x), SCALE(y), SCALE(z));
  75     }
  76   }
  77 #else
  78   /* XXX No support currently for X11 joysticks. */
  79 #endif
  80 }
  81
  82 /* ENDCENTRY */