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dolphin/Source/Core/InputCommon/Src/SDL.cpp

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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) 2003-2008 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/
//
//////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////
// Include
// ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
#define _SDL_MAIN_ // Avoid certain declarations in SDL.h
#include "SDL.h" // Local
#include "XInput.h"
////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////
// Definitions
// ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
int g_LastPad = 0;
////////////////////////////////////
namespace InputCommon
{
//////////////////////////////////////////////////////////////////////////////////////////
// Definitions
// ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////
// Search attached devices. Populate joyinfo for all attached physical devices.
// ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
bool SearchDevices(std::vector<CONTROLLER_INFO> &_joyinfo, int &_NumPads, int &_NumGoodPads)
{
/* SDL 1.3 use DirectInput instead of the old Microsoft Multimedia API, and with this we need
the SDL_INIT_VIDEO flag to */
if (!SDL_WasInit(0))
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK) < 0)
{
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;
}
////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////
// Supporting functions
// ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
// Read current joystick status
/* ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
The value PadMapping[].buttons[] is the number of the assigned joypad button,
PadState[].buttons[] is the status of the button, it becomes 0 (no pressed) or 1 (pressed) */
// Read buttons status. Called from GetJoyState().
// ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
void ReadButton(CONTROLLER_STATE &_PadState, CONTROLLER_MAPPING _PadMapping, int button, int NumButtons)
{
int ctl_button = _PadMapping.buttons[button];
if (ctl_button < NumButtons)
{
_PadState.buttons[button] = SDL_JoystickGetButton(_PadState.joy, ctl_button);
}
}
// Request joystick state.
// ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
/* Called from: PAD_GetStatus()
Input: The virtual device 0, 1, 2 or 3
Function: Updates the PadState struct with the current pad status. The input value "controller" is
for a virtual controller 0 to 3. */
void GetJoyState(CONTROLLER_STATE &_PadState, CONTROLLER_MAPPING _PadMapping, int Controller, int NumButtons)
{
// Update the gamepad status
SDL_JoystickUpdate();
// Update axis states. It doesn't hurt much if we happen to ask for nonexisting axises here.
_PadState.axis[CTL_MAIN_X] = SDL_JoystickGetAxis(_PadState.joy, _PadMapping.axis[CTL_MAIN_X]);
_PadState.axis[CTL_MAIN_Y] = SDL_JoystickGetAxis(_PadState.joy, _PadMapping.axis[CTL_MAIN_Y]);
_PadState.axis[CTL_SUB_X] = SDL_JoystickGetAxis(_PadState.joy, _PadMapping.axis[CTL_SUB_X]);
_PadState.axis[CTL_SUB_Y] = SDL_JoystickGetAxis(_PadState.joy, _PadMapping.axis[CTL_SUB_Y]);
// Update the analog trigger axis values
#ifdef _WIN32
if (_PadMapping.triggertype == CTL_TRIGGER_SDL)
{
#endif
// If we are using SDL analog triggers the buttons have to be mapped as 1000 or up, otherwise they are not used
if(_PadMapping.buttons[CTL_L_SHOULDER] >= 1000) _PadState.axis[CTL_L_SHOULDER] = SDL_JoystickGetAxis(_PadState.joy, _PadMapping.buttons[CTL_L_SHOULDER] - 1000); else _PadState.axis[CTL_L_SHOULDER] = 0;
if(_PadMapping.buttons[CTL_R_SHOULDER] >= 1000) _PadState.axis[CTL_R_SHOULDER] = SDL_JoystickGetAxis(_PadState.joy, _PadMapping.buttons[CTL_R_SHOULDER] - 1000); else _PadState.axis[CTL_R_SHOULDER] = 0;
#ifdef _WIN32
}
else
{
_PadState.axis[CTL_L_SHOULDER] = XInput::GetXI(0, _PadMapping.buttons[CTL_L_SHOULDER] - 1000);
_PadState.axis[CTL_R_SHOULDER] = XInput::GetXI(0, _PadMapping.buttons[CTL_R_SHOULDER] - 1000);
}
#endif
// Update button states to on or off
ReadButton(_PadState, _PadMapping, CTL_L_SHOULDER, NumButtons);
ReadButton(_PadState, _PadMapping, CTL_R_SHOULDER, NumButtons);
ReadButton(_PadState, _PadMapping, CTL_A_BUTTON, NumButtons);
ReadButton(_PadState, _PadMapping, CTL_B_BUTTON, NumButtons);
ReadButton(_PadState, _PadMapping, CTL_X_BUTTON, NumButtons);
ReadButton(_PadState, _PadMapping, CTL_Y_BUTTON, NumButtons);
ReadButton(_PadState, _PadMapping, CTL_Z_TRIGGER, NumButtons);
ReadButton(_PadState, _PadMapping, CTL_START, NumButtons);
//
if (_PadMapping.halfpress < NumButtons)
_PadState.halfpress = SDL_JoystickGetButton(_PadState.joy, _PadMapping.halfpress);
// Check if we have an analog or digital joypad
if (_PadMapping.controllertype == CTL_DPAD_HAT)
{
_PadState.dpad = SDL_JoystickGetHat(_PadState.joy, _PadMapping.dpad);
}
else
{
/* Only do this if the assigned button is in range (to allow for the current way of saving keyboard
keys in the same array) */
if(_PadMapping.dpad2[CTL_D_PAD_UP] <= NumButtons)
_PadState.dpad2[CTL_D_PAD_UP] = SDL_JoystickGetButton(_PadState.joy, _PadMapping.dpad2[CTL_D_PAD_UP]);
if(_PadMapping.dpad2[CTL_D_PAD_DOWN] <= NumButtons)
_PadState.dpad2[CTL_D_PAD_DOWN] = SDL_JoystickGetButton(_PadState.joy, _PadMapping.dpad2[CTL_D_PAD_DOWN]);
if(_PadMapping.dpad2[CTL_D_PAD_LEFT] <= NumButtons)
_PadState.dpad2[CTL_D_PAD_LEFT] = SDL_JoystickGetButton(_PadState.joy, _PadMapping.dpad2[CTL_D_PAD_LEFT]);
if(_PadMapping.dpad2[CTL_D_PAD_RIGHT] <= NumButtons)
_PadState.dpad2[CTL_D_PAD_RIGHT] = SDL_JoystickGetButton(_PadState.joy, _PadMapping.dpad2[CTL_D_PAD_RIGHT]);
}
#ifdef SHOW_PAD_STATUS
// Show the status of all connected pads
if ((g_LastPad == 0 && Controller == 0) || Controller < g_LastPad) Console::ClearScreen();
g_LastPad = Controller;
Console::Print(
"Pad | Number:%i Enabled:%i Handle:%i\n"
"Main Stick | X:%03i Y:%03i\n"
"C Stick | X:%03i Y:%03i\n"
"Trigger | Type:%s DigitalL:%i DigitalR:%i AnalogL:%03i AnalogR:%03i HalfPress:%i\n"
"Buttons | A:%i X:%i\n"
"D-Pad | Type:%s Hat:%i U:%i D:%i\n"
"======================================================\n",
Controller, _PadMapping.enabled, _PadState.joy,
_PadState.axis[InputCommon::CTL_MAIN_X], _PadState.axis[InputCommon::CTL_MAIN_Y],
_PadState.axis[InputCommon::CTL_SUB_X], _PadState.axis[InputCommon::CTL_SUB_Y],
(_PadMapping.triggertype ? "CTL_TRIGGER_XINPUT" : "CTL_TRIGGER_SDL"),
_PadState.buttons[InputCommon::CTL_L_SHOULDER], _PadState.buttons[InputCommon::CTL_R_SHOULDER],
_PadState.axis[InputCommon::CTL_L_SHOULDER], _PadState.axis[InputCommon::CTL_R_SHOULDER],
_PadState.halfpress,
_PadState.buttons[InputCommon::CTL_A_BUTTON], _PadState.buttons[InputCommon::CTL_X_BUTTON],
(_PadMapping.controllertype ? "CTL_DPAD_CUSTOM" : "CTL_DPAD_HAT"),
_PadState.dpad,
_PadState.dpad2[InputCommon::CTL_D_PAD_UP], _PadState.dpad2[InputCommon::CTL_D_PAD_DOWN]
);
#endif
}
//////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////
// Configure button mapping
// ¯¯¯¯¯¯¯¯¯¯
// 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 > -0x2000 && value < 0x2000) // Small values
|| ((value < -0x6000 || value > 0x6000) && !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++)
{
if(SDL_JoystickGetHat(joy, i))
{
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)
{
for(int i = 0; i <= InputCommon::XI_TRIGGER_R; i++)
{
if(XInput::GetXI(0, 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;
}
}
}
/////////////////////////////////////////////////////////// Configure button mapping
} // InputCommon
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