glut_joy.c revision c041511d 
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 */
21void GLUTAPIENTRY
22glutJoystickFunc(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
54void GLUTAPIENTRY
55glutForceJoystickFunc(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 */
86