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gblues 2018-04-24 06:37:02 -07:00
parent 1d84c0eca1
commit f6b33b1d30
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input/common/input_common.c Normal file
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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2017 - Daniel De Matteis
*
* RetroArch 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include "../include/gamepad.h"
enum pad_axes {
AXIS_LEFT_ANALOG_X,
AXIS_LEFT_ANALOG_Y,
AXIS_RIGHT_ANALOG_X,
AXIS_RIGHT_ANALOG_Y,
AXIS_INVALID
};
static int16_t clamp_axis(int16_t value, bool is_negative)
{
if(is_negative && value > 0)
return 0;
if(!is_negative && value < 0)
return 0;
return value;
}
void gamepad_read_axis_data(uint32_t axis, axis_data *data)
{
if(!data)
return;
data->axis = AXIS_POS_GET(axis);
data->is_negative = false;
if(data->axis >= AXIS_INVALID)
{
data->axis = AXIS_NEG_GET(axis);
data->is_negative = true;
}
}
int16_t gamepad_get_axis_value(int16_t state[3][2], axis_data *data)
{
int16_t value = 0;
if(!data)
return 0;
switch(data->axis)
{
case AXIS_LEFT_ANALOG_X:
value = state[RETRO_DEVICE_INDEX_ANALOG_LEFT][RETRO_DEVICE_ID_ANALOG_X];
break;
case AXIS_LEFT_ANALOG_Y:
value = state[RETRO_DEVICE_INDEX_ANALOG_LEFT][RETRO_DEVICE_ID_ANALOG_Y];
break;
case AXIS_RIGHT_ANALOG_X:
value = state[RETRO_DEVICE_INDEX_ANALOG_RIGHT][RETRO_DEVICE_ID_ANALOG_X];
break;
case AXIS_RIGHT_ANALOG_Y:
value = state[RETRO_DEVICE_INDEX_ANALOG_RIGHT][RETRO_DEVICE_ID_ANALOG_Y];
break;
}
return clamp_axis(value, data->is_negative);
}