blender/source/gameengine/GameLogic/Joystick/SCA_Joystick.cpp
2014-11-23 15:13:58 +01:00

379 lines
8.6 KiB
C++

/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): snailrose.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file gameengine/GameLogic/Joystick/SCA_Joystick.cpp
* \ingroup gamelogic
*/
#ifdef WITH_SDL
# include <SDL.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include "SCA_Joystick.h"
#include "SCA_JoystickPrivate.h"
#include "BLI_path_util.h"
#ifdef WITH_SDL
# define SDL_CHECK(x) ((x) != (void *)0)
#endif
SCA_Joystick::SCA_Joystick(short int index)
:
m_joyindex(index),
m_prec(3200),
m_axismax(-1),
m_buttonmax(-1),
m_hatmax(-1),
m_isinit(0),
m_istrig_axis(0),
m_istrig_button(0),
m_istrig_hat(0)
{
for (int i=0; i < JOYAXIS_MAX; i++)
m_axis_array[i] = 0;
for (int i=0; i < JOYHAT_MAX; i++)
m_hat_array[i] = 0;
#ifdef WITH_SDL
m_private = new PrivateData();
#endif
}
SCA_Joystick::~SCA_Joystick()
{
#ifdef WITH_SDL
delete m_private;
#endif
}
SCA_Joystick *SCA_Joystick::m_instance[JOYINDEX_MAX];
int SCA_Joystick::m_joynum = 0;
int SCA_Joystick::m_refCount = 0;
SCA_Joystick *SCA_Joystick::GetInstance( short int joyindex )
{
#ifndef WITH_SDL
return NULL;
#else /* WITH_SDL */
if (!SDL_CHECK(SDL_InitSubSystem)) {
return NULL;
}
if (joyindex < 0 || joyindex >= JOYINDEX_MAX) {
JOYSTICK_ECHO("Error-invalid joystick index: " << joyindex);
return NULL;
}
if (m_refCount == 0)
{
int i;
/* The video subsystem is required for joystick input to work. However,
* when GHOST is running under SDL, video is initialized elsewhere. We
* also need to set the videodriver to dummy, and do it here to avoid
* interfering with addons that may use SDL too.
*
* We also init SDL once only. */
# ifdef WITH_GHOST_SDL
int success = (SDL_InitSubSystem(SDL_INIT_JOYSTICK) != -1 );
# else
/* set and restore environment variable */
char *videodriver = getenv("SDL_VIDEODRIVER");
BLI_setenv("SDL_VIDEODRIVER", "dummy");
int success = (SDL_InitSubSystem(SDL_INIT_JOYSTICK | SDL_INIT_VIDEO) != -1 );
BLI_setenv("SDL_VIDEODRIVER", videodriver);
# endif
if (!success) {
JOYSTICK_ECHO("Error-Initializing-SDL: " << SDL_GetError());
return NULL;
}
m_joynum = SDL_NumJoysticks();
for (i=0; i<JOYINDEX_MAX; i++) {
m_instance[i] = new SCA_Joystick(i);
m_instance[i]->CreateJoystickDevice();
}
m_refCount = 1;
}
else
{
m_refCount++;
}
return m_instance[joyindex];
#endif /* WITH_SDL */
}
void SCA_Joystick::ReleaseInstance()
{
if (--m_refCount == 0)
{
#ifdef WITH_SDL
if (!SDL_CHECK(SDL_QuitSubSystem)) {
return;
}
for (int i=0; i<JOYINDEX_MAX; i++) {
if (m_instance[i]) {
m_instance[i]->DestroyJoystickDevice();
delete m_instance[i];
}
m_instance[i] = NULL;
}
/* The video subsystem is required for joystick input to work. However,
* when GHOST is running under SDL, video is freed elsewhere.
* Do this once only. */
# ifdef WITH_GHOST_SDL
SDL_QuitSubSystem(SDL_INIT_JOYSTICK);
# else
SDL_QuitSubSystem(SDL_INIT_JOYSTICK | SDL_INIT_VIDEO);
# endif
#endif /* WITH_SDL */
}
}
void SCA_Joystick::cSetPrecision(int val)
{
m_prec = val;
}
bool SCA_Joystick::aAxisPairIsPositive(int axis)
{
return (pAxisTest(axis) > m_prec) ? true:false;
}
bool SCA_Joystick::aAxisPairDirectionIsPositive(int axis, int dir)
{
int res;
if (dir==JOYAXIS_UP || dir==JOYAXIS_DOWN)
res = pGetAxis(axis, 1);
else /* JOYAXIS_LEFT || JOYAXIS_RIGHT */
res = pGetAxis(axis, 0);
if (dir==JOYAXIS_DOWN || dir==JOYAXIS_RIGHT)
return (res > m_prec) ? true : false;
else /* JOYAXIS_UP || JOYAXIS_LEFT */
return (res < -m_prec) ? true : false;
}
bool SCA_Joystick::aAxisIsPositive(int axis_single)
{
return abs(m_axis_array[axis_single]) > m_prec ? true:false;
}
bool SCA_Joystick::aAnyButtonPressIsPositive(void)
{
#ifdef WITH_SDL
if (!SDL_CHECK(SDL_JoystickGetButton)) {
return false;
}
/* this is needed for the "all events" option
* so we know if there are no buttons pressed */
for (int i=0; i<m_buttonmax; i++)
if (SDL_JoystickGetButton(m_private->m_joystick, i))
return true;
#endif
return false;
}
bool SCA_Joystick::aButtonPressIsPositive(int button)
{
#ifndef WITH_SDL
return false;
#else
bool result;
result = SDL_CHECK(SDL_JoystickGetButton) && SDL_JoystickGetButton(m_private->m_joystick, button);
return result;
#endif
}
bool SCA_Joystick::aButtonReleaseIsPositive(int button)
{
#ifndef WITH_SDL
return false;
#else
bool result;
result = !(SDL_CHECK(SDL_JoystickGetButton) && SDL_JoystickGetButton(m_private->m_joystick, button));
return result;
#endif
}
bool SCA_Joystick::aHatIsPositive(int hatnum, int dir)
{
return (GetHat(hatnum)==dir) ? true : false;
}
int SCA_Joystick::GetNumberOfAxes()
{
return m_axismax;
}
int SCA_Joystick::GetNumberOfButtons()
{
return m_buttonmax;
}
int SCA_Joystick::GetNumberOfHats()
{
return m_hatmax;
}
bool SCA_Joystick::CreateJoystickDevice(void)
{
#ifndef WITH_SDL
m_isinit = true;
m_axismax = m_buttonmax = m_hatmax = 0;
return false;
#else /* WITH_SDL */
if (m_isinit == false && SDL_CHECK(SDL_JoystickOpen)) {
if (m_joyindex>=m_joynum) {
/* don't print a message, because this is done anyway */
//JOYSTICK_ECHO("Joystick-Error: " << SDL_NumJoysticks() << " avaiable joystick(s)");
/* Need this so python args can return empty lists */
m_axismax = m_buttonmax = m_hatmax = 0;
return false;
}
m_private->m_joystick = SDL_JoystickOpen(m_joyindex);
SDL_JoystickEventState(SDL_ENABLE);
m_isinit = true;
JOYSTICK_ECHO("Joystick " << m_joyindex << " initialized");
/* must run after being initialized */
m_axismax = SDL_JoystickNumAxes(m_private->m_joystick);
m_buttonmax = SDL_JoystickNumButtons(m_private->m_joystick);
m_hatmax = SDL_JoystickNumHats(m_private->m_joystick);
if (m_axismax > JOYAXIS_MAX) m_axismax = JOYAXIS_MAX; /* very unlikely */
else if (m_axismax < 0) m_axismax = 0;
if (m_hatmax > JOYHAT_MAX) m_hatmax = JOYHAT_MAX; /* very unlikely */
else if (m_hatmax < 0) m_hatmax = 0;
if (m_buttonmax < 0) m_buttonmax = 0;
}
return true;
#endif /* WITH_SDL */
}
void SCA_Joystick::DestroyJoystickDevice(void)
{
#ifdef WITH_SDL
if (m_isinit) {
#if SDL_VERSION_ATLEAST(2, 0, 0)
if (SDL_CHECK(SDL_JoystickGetAttached) && SDL_JoystickGetAttached(m_private->m_joystick))
#else
if (SDL_CHECK(SDL_JoystickOpened) && SDL_JoystickOpened(m_joyindex))
#endif
{
JOYSTICK_ECHO("Closing-joystick " << m_joyindex);
SDL_JoystickClose(m_private->m_joystick);
}
m_isinit = false;
}
#endif /* WITH_SDL */
}
int SCA_Joystick::Connected(void)
{
#ifdef WITH_SDL
if (m_isinit &&
#if SDL_VERSION_ATLEAST(2, 0, 0)
SDL_CHECK(SDL_JoystickGetAttached) && SDL_JoystickGetAttached(m_private->m_joystick)
#else
SDL_CHECK(SDL_JoystickOpened) && SDL_JoystickOpened(m_joyindex)
#endif
)
{
return 1;
}
#endif
return 0;
}
int SCA_Joystick::pGetAxis(int axisnum, int udlr)
{
#ifdef WITH_SDL
return m_axis_array[(axisnum*2)+udlr];
#endif
return 0;
}
int SCA_Joystick::pAxisTest(int axisnum)
{
#ifdef WITH_SDL
/* Use ints instead of shorts here to avoid problems when we get -32768.
* When we take the negative of that later, we should get 32768, which is greater
* than what a short can hold. In other words, abs(MIN_SHORT) > MAX_SHRT. */
int i1 = m_axis_array[(axisnum * 2)];
int i2 = m_axis_array[(axisnum * 2) + 1];
/* long winded way to do:
* return max_ff(absf(i1), absf(i2))
* ...avoid abs from math.h */
if (i1 < 0) i1 = -i1;
if (i2 < 0) i2 = -i2;
if (i1 <i2) return i2;
else return i1;
#else /* WITH_SDL */
return 0;
#endif /* WITH_SDL */
}
const char *SCA_Joystick::GetName()
{
#ifdef WITH_SDL
#if SDL_VERSION_ATLEAST(2, 0, 0)
return (SDL_CHECK(SDL_JoystickName)) ? SDL_JoystickName(m_private->m_joystick) : "";
#else
return (SDL_CHECK(SDL_JoystickName)) ? SDL_JoystickName(m_joyindex) : "";
#endif
#else /* WITH_SDL */
return "";
#endif /* WITH_SDL */
}