segatools/idzio/xi.c

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C
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#include <windows.h>
#include <xinput.h>
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#include <assert.h>
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#include <stdbool.h>
#include <stdint.h>
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#include "idzio/backend.h"
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#include "idzio/idzio.h"
#include "idzio/shifter.h"
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#include "idzio/xi.h"
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#include "util/dprintf.h"
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static void idz_xi_jvs_read_buttons(uint8_t *gamebtn_out);
static void idz_xi_jvs_read_shifter(uint8_t *gear);
static void idz_xi_jvs_read_analogs(struct idz_io_analog_state *out);
static const struct idz_io_backend idz_xi_backend = {
.jvs_read_buttons = idz_xi_jvs_read_buttons,
.jvs_read_shifter = idz_xi_jvs_read_shifter,
.jvs_read_analogs = idz_xi_jvs_read_analogs,
};
HRESULT idz_xi_init(const struct idz_io_backend **backend)
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{
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assert(backend != NULL);
dprintf("XInput: Using XInput controller\n");
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*backend = &idz_xi_backend;
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return S_OK;
}
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static void idz_xi_jvs_read_buttons(uint8_t *gamebtn_out)
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{
uint8_t gamebtn;
XINPUT_STATE xi;
WORD xb;
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assert(gamebtn_out != NULL);
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gamebtn = 0;
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memset(&xi, 0, sizeof(xi));
XInputGetState(0, &xi);
xb = xi.Gamepad.wButtons;
if (xb & XINPUT_GAMEPAD_DPAD_UP) {
gamebtn |= IDZ_IO_GAMEBTN_UP;
}
if (xb & XINPUT_GAMEPAD_DPAD_DOWN) {
gamebtn |= IDZ_IO_GAMEBTN_DOWN;
}
if (xb & XINPUT_GAMEPAD_DPAD_LEFT) {
gamebtn |= IDZ_IO_GAMEBTN_LEFT;
}
if (xb & XINPUT_GAMEPAD_DPAD_RIGHT) {
gamebtn |= IDZ_IO_GAMEBTN_RIGHT;
}
if (xb & (XINPUT_GAMEPAD_START | XINPUT_GAMEPAD_A)) {
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gamebtn |= IDZ_IO_GAMEBTN_START;
}
if (xb & (XINPUT_GAMEPAD_BACK | XINPUT_GAMEPAD_B)) {
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gamebtn |= IDZ_IO_GAMEBTN_VIEW_CHANGE;
}
*gamebtn_out = gamebtn;
}
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static void idz_xi_jvs_read_shifter(uint8_t *gear)
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{
bool shift_dn;
bool shift_up;
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XINPUT_STATE xi;
WORD xb;
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assert(gear != NULL);
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memset(&xi, 0, sizeof(xi));
XInputGetState(0, &xi);
xb = xi.Gamepad.wButtons;
if (xb & XINPUT_GAMEPAD_START) {
/* Reset to Neutral when start is pressed */
idz_shifter_reset();
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}
shift_dn = xb & (XINPUT_GAMEPAD_Y | XINPUT_GAMEPAD_LEFT_SHOULDER);
shift_up = xb & (XINPUT_GAMEPAD_X | XINPUT_GAMEPAD_RIGHT_SHOULDER);
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idz_shifter_update(shift_dn, shift_up);
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*gear = idz_shifter_current_gear();
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}
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static void idz_xi_jvs_read_analogs(struct idz_io_analog_state *out)
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{
XINPUT_STATE xi;
int left;
int right;
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assert(out != NULL);
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memset(&xi, 0, sizeof(xi));
XInputGetState(0, &xi);
left = xi.Gamepad.sThumbLX;
if (left < -XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE) {
left += XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE;
} else if (left > XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE) {
left -= XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE;
} else {
left = 0;
}
right = xi.Gamepad.sThumbRX;
if (right < -XINPUT_GAMEPAD_RIGHT_THUMB_DEADZONE) {
right += XINPUT_GAMEPAD_RIGHT_THUMB_DEADZONE;
} else if (right > XINPUT_GAMEPAD_RIGHT_THUMB_DEADZONE) {
right -= XINPUT_GAMEPAD_RIGHT_THUMB_DEADZONE;
} else {
right = 0;
}
out->wheel = (left + right) / 2;
out->accel = xi.Gamepad.bRightTrigger << 8;
out->brake = xi.Gamepad.bLeftTrigger << 8;
}