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//========================================================================
// GLFW - An OpenGL framework
// Platform: Win32/WGL
// API version: 2.7
// WWW: http://www.glfw.org/
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.org>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
//========================================================================
#include "internal.h"
//************************************************************************
//**** GLFW internal functions ****
//************************************************************************
//========================================================================
// Return GL_TRUE if joystick is present, else return GL_FALSE.
//========================================================================
static int _glfwJoystickPresent( int joy )
{
JOYINFO ji;
// Windows NT 4.0 MMSYSTEM only supports 2 sticks (other Windows
// versions support 16 sticks)
if( _glfwLibrary.Sys.winVer == _GLFW_WIN_NT4 && joy > GLFW_JOYSTICK_2 )
{
return GL_FALSE;
}
// Is it a valid stick ID (Windows don't support more than 16 sticks)?
if( joy < GLFW_JOYSTICK_1 || joy > GLFW_JOYSTICK_16 )
{
return GL_FALSE;
}
// Is the joystick present?
if( _glfw_joyGetPos( joy - GLFW_JOYSTICK_1, &ji ) != JOYERR_NOERROR )
{
return GL_FALSE;
}
return GL_TRUE;
}
//========================================================================
// Calculate joystick position
//========================================================================
static float _glfwCalcJoystickPos( DWORD pos, DWORD min, DWORD max )
{
float fpos = (float) pos;
float fmin = (float) min;
float fmax = (float) max;
return (2.0f*(fpos - fmin) / (fmax - fmin)) - 1.0f;
}
//************************************************************************
//**** Platform implementation functions ****
//************************************************************************
//========================================================================
// Determine joystick capabilities
//========================================================================
int _glfwPlatformGetJoystickParam( int joy, int param )
{
JOYCAPS jc;
// return 0;
// Is joystick present?
if( !_glfwJoystickPresent( joy ) )
{
return 0;
}
// We got this far, the joystick is present
if( param == GLFW_PRESENT )
{
return GL_TRUE;
}
// Get joystick capabilities
_glfw_joyGetDevCaps( joy - GLFW_JOYSTICK_1, &jc, sizeof(JOYCAPS) );
switch( param )
{
case GLFW_AXES:
// Return number of joystick axes
return jc.wNumAxes;
case GLFW_BUTTONS:
// Return number of joystick axes
return jc.wNumButtons;
default:
break;
}
return 0;
}
//========================================================================
// Get joystick axis positions
//========================================================================
int _glfwPlatformGetJoystickPos( int joy, float *pos, int numaxes )
{
JOYCAPS jc;
JOYINFOEX ji;
int axis;
// return 0;
// Is joystick present?
if( !_glfwJoystickPresent( joy ) )
{
return 0;
}
// Get joystick capabilities
_glfw_joyGetDevCaps( joy - GLFW_JOYSTICK_1, &jc, sizeof(JOYCAPS) );
// Get joystick state
ji.dwSize = sizeof( JOYINFOEX );
ji.dwFlags = JOY_RETURNX | JOY_RETURNY | JOY_RETURNZ |
JOY_RETURNR | JOY_RETURNU | JOY_RETURNV;
_glfw_joyGetPosEx( joy - GLFW_JOYSTICK_1, &ji );
// Get position values for all axes
axis = 0;
if( axis < numaxes )
{
pos[ axis++ ] = _glfwCalcJoystickPos( ji.dwXpos, jc.wXmin,
jc.wXmax );
}
if( axis < numaxes )
{
pos[ axis++ ] = -_glfwCalcJoystickPos( ji.dwYpos, jc.wYmin,
jc.wYmax );
}
if( axis < numaxes && jc.wCaps & JOYCAPS_HASZ )
{
pos[ axis++ ] = _glfwCalcJoystickPos( ji.dwZpos, jc.wZmin,
jc.wZmax );
}
if( axis < numaxes && jc.wCaps & JOYCAPS_HASR )
{
pos[ axis++ ] = _glfwCalcJoystickPos( ji.dwRpos, jc.wRmin,
jc.wRmax );
}
if( axis < numaxes && jc.wCaps & JOYCAPS_HASU )
{
pos[ axis++ ] = _glfwCalcJoystickPos( ji.dwUpos, jc.wUmin,
jc.wUmax );
}
if( axis < numaxes && jc.wCaps & JOYCAPS_HASV )
{
pos[ axis++ ] = -_glfwCalcJoystickPos( ji.dwVpos, jc.wVmin,
jc.wVmax );
}
// Return number of returned axes
return axis;
}
//========================================================================
// Get joystick button states
//========================================================================
int _glfwPlatformGetJoystickButtons( int joy, unsigned char *buttons,
int numbuttons )
{
JOYCAPS jc;
JOYINFOEX ji;
int button;
// return 0;
// Is joystick present?
if( !_glfwJoystickPresent( joy ) )
{
return 0;
}
// Get joystick capabilities
_glfw_joyGetDevCaps( joy - GLFW_JOYSTICK_1, &jc, sizeof(JOYCAPS) );
// Get joystick state
ji.dwSize = sizeof( JOYINFOEX );
ji.dwFlags = JOY_RETURNBUTTONS;
_glfw_joyGetPosEx( joy - GLFW_JOYSTICK_1, &ji );
// Get states of all requested buttons
button = 0;
while( button < numbuttons && button < (int) jc.wNumButtons )
{
buttons[ button ] = (unsigned char)
(ji.dwButtons & (1UL << button) ? GLFW_PRESS : GLFW_RELEASE);
button ++;
}
return button;
}
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