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// Project description
// -------------------
// Name: SDL Input
// Description: Common SDL Input Functions
//
// Author: Falcon4ever (nJoy@falcon4ever.com, www.multigesture.net), JPeterson etc
// Copyright (C) 2003 Dolphin Project.
//
//
// Licensetype: GNU General Public License (GPL)
//
// 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, version 2.0.
//
// 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 2.0 for more details.
//
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
//
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
//
#define _SDL_MAIN_ // Avoid certain declarations in SDL.h
#include "InputCommon.h"
#include "SDL_Util.h" // Local
#ifdef _WIN32
#include "XInput_Util.h"
#endif
namespace InputCommon
{
// Search attached devices. Populate joyinfo for all attached physical devices.
// -----------------------
bool SearchDevices(std::vector<CONTROLLER_INFO> &_joyinfo, int &_NumPads, int &_NumGoodPads)
{
if (!SDL_WasInit(0))
#if SDL_VERSION_ATLEAST(1, 3, 0)
if (SDL_Init(SDL_INIT_JOYSTICK | SDL_INIT_HAPTIC) < 0)
#else
if (SDL_Init(SDL_INIT_JOYSTICK) < 0)
#endif
{
PanicAlert("Could not initialize SDL: %s", SDL_GetError());
return false;
}
// Get device status
int numjoy = SDL_NumJoysticks();
for (int i = 0; i < numjoy; i++ )
{
CONTROLLER_INFO Tmp;
Tmp.joy = SDL_JoystickOpen(i);
Tmp.ID = i;
Tmp.NumAxes = SDL_JoystickNumAxes(Tmp.joy);
Tmp.NumButtons = SDL_JoystickNumButtons(Tmp.joy);
Tmp.NumBalls = SDL_JoystickNumBalls(Tmp.joy);
Tmp.NumHats = SDL_JoystickNumHats(Tmp.joy);
Tmp.Name = SDL_JoystickName(i);
// Check if the device is okay
if ( Tmp.NumAxes == 0
&& Tmp.NumBalls == 0
&& Tmp.NumButtons == 0
&& Tmp.NumHats == 0
)
{
Tmp.Good = false;
}
else
{
_NumGoodPads++;
Tmp.Good = true;
}
_joyinfo.push_back(Tmp);
// We have now read the values we need so we close the device
// if (SDL_JoystickOpened(i)) SDL_JoystickClose(_joyinfo[i].joy);
}
_NumPads = (int)_joyinfo.size();
return true;
}
// Avoid extreme axis values
// ---------------------
/* Function: We have to avoid very big values to becuse some triggers are -0x8000 in the
unpressed state (and then go from -0x8000 to 0x8000 as they are fully pressed) */
bool AvoidValues(int value, bool NoTriggerFilter)
{
// Avoid detecting very small or very big (for triggers) values
if( (value > -0x1000 && value < 0x1000) // Small values
|| ((value < -0x7000 || value > 0x7000) && !NoTriggerFilter)) // Big values
return true; // Avoid
else
return false; // Keep
}
// Detect a pressed button
// ---------------------
void GetButton(SDL_Joystick *joy, int ControllerID, int buttons, int axes, int hats,
int &KeyboardKey, int &value, int &type, int &pressed, bool &Succeed, bool &Stop,
bool LeftRight, bool Axis, bool XInput, bool Button, bool Hat, bool NoTriggerFilter)
{
// It needs the wxWidgets excape keycode
static const int WXK_ESCAPE = 27;
// Update the internal status
SDL_JoystickUpdate();
// For the triggers we accept both a digital or an analog button
if(Axis)
{
for(int i = 0; i < axes; i++)
{
value = SDL_JoystickGetAxis(joy, i);
if(AvoidValues(value, NoTriggerFilter)) continue; // Avoid values
pressed = i + (LeftRight ? 1000 : 0); // Identify the analog triggers
type = InputCommon::CTL_AXIS;
Succeed = true;
}
}
// Check for a hat
if(Hat)
{
for(int i = 0; i < hats; i++)
{
value = SDL_JoystickGetHat(joy, i);
if(value)
{
pressed = i;
type = InputCommon::CTL_HAT;
Succeed = true;
}
}
}
// Check for a button
if(Button)
{
for(int i = 0; i < buttons; i++)
{
// Some kind of bug in SDL 1.3 would give button 9 and 10 (nonexistent) the value 48 on the 360 pad
if (SDL_JoystickGetButton(joy, i) > 1) continue;
if(SDL_JoystickGetButton(joy, i))
{
pressed = i;
type = InputCommon::CTL_BUTTON;
Succeed = true;
}
}
}
// Check for a XInput trigger
#ifdef _WIN32
if(XInput && LeftRight)
{
for(int i = 0; i <= InputCommon::XI_TRIGGER_R; i++)
{
if(XInput::GetXI(ControllerID, i))
{
pressed = i + 1000;
type = InputCommon::CTL_AXIS;
Succeed = true;
}
}
}
#endif
// Check for keyboard action
if (KeyboardKey)
{
if(Button)
{
// Todo: Add a separate keyboard vector to remove this restriction
if(KeyboardKey >= buttons)
{
pressed = KeyboardKey;
type = InputCommon::CTL_BUTTON;
Succeed = true;
KeyboardKey = 0;
if(pressed == WXK_ESCAPE) pressed = -1; // Check for the escape key
}
// Else show the error message
else
{
pressed = KeyboardKey;
KeyboardKey = -1;
Stop = true;
}
}
// Only accept the escape key
else if (KeyboardKey == WXK_ESCAPE)
{
Succeed = true;
KeyboardKey = 0;
pressed = -1;
}
}
}
} // InputCommon
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