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