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 #ifdef __MINGW32__
  10 #include <GL/gl.h>
  11 #endif
  12 #include <windows.h>
  13 #ifndef __CYGWIN32__
  14 #include <mmsystem.h>  /* Win32 Multimedia API header. */
  15 #endif
  16 #endif
  17
  18 #include "glutint.h"
  19
  20 /* CENTRY */
  21 void GLUTAPIENTRY
  22 glutJoystickFunc(GLUTjoystickCB joystickFunc, int pollInterval)
  23 {
  24 #ifdef _WIN32
  25   if (joystickFunc && (pollInterval > 0)) {
  26     if (__glutCurrentWindow->entryState == WM_SETFOCUS) {
  27       MMRESULT result;
  28
  29       /* Capture joystick focus if current window has
  30          focus now. */
  31       result = joySetCapture(__glutCurrentWindow->win,
  32         JOYSTICKID1, 0, TRUE);
  33       if (result == JOYERR_NOERROR) {
  34         (void) joySetThreshold(JOYSTICKID1, pollInterval);
  35       }
  36     }
  37     __glutCurrentWindow->joyPollInterval = pollInterval;
  38   } else {
  39     /* Release joystick focus if current window has
  40        focus now. */
  41     if (__glutCurrentWindow->joystick
  42       && (__glutCurrentWindow->joyPollInterval > 0)
  43       && (__glutCurrentWindow->entryState == WM_SETFOCUS)) {
  44       (void) joyReleaseCapture(JOYSTICKID1);
  45     }
  46     __glutCurrentWindow->joyPollInterval = 0;
  47   }
  48   __glutCurrentWindow->joystick = joystickFunc;
  49 #else
  50   /* XXX No support currently for X11 joysticks. */
  51 #endif
  52 }
  53
  54 void GLUTAPIENTRY
  55 glutForceJoystickFunc(void)
  56 {
  57 #ifdef _WIN32
  58   if (__glutCurrentWindow->joystick) {
  59     JOYINFOEX jix;
  60     MMRESULT res;
  61     int x, y, z;
  62
  63     /* Poll the joystick. */
  64     jix.dwSize = sizeof(jix);
  65     jix.dwFlags = JOY_RETURNALL;
  66     res = joyGetPosEx(JOYSTICKID1,&jix);
  67     if (res == JOYERR_NOERROR) {
  68
  69       /* Convert to int for scaling. */
  70       x = jix.dwXpos;
  71       y = jix.dwYpos;
  72       z = jix.dwZpos;
  73
  74 #define SCALE(v)  ((int) ((v - 32767)/32.768))
  75
  76       __glutCurrentWindow->joystick(jix.dwButtons,
  77         SCALE(x), SCALE(y), SCALE(z));
  78     }
  79   }
  80 #else
  81   /* XXX No support currently for X11 joysticks. */
  82 #endif
  83 }
  84
  85 /* ENDCENTRY */