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SDL2 controller backend - support axes and hats

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These are now mapped to buttons - will have more of a use in the
enhanced branch.
This commit is contained in:
Clownacy 2020-04-04 22:54:58 +01:00
parent 7c729af36f
commit 2aeda93aeb
2 changed files with 76 additions and 9 deletions
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83
src/Backends/SDL2/Controller.cpp
View file

@ -37,6 +37,8 @@ BOOL ControllerBackend_GetJoystickStatus(JOYSTICK_STATUS *status)
if (joystick == NULL)
return FALSE;
const size_t button_limit = sizeof(status->bButton) / sizeof(status->bButton);
// Read axis
const Sint16 joystick_x = SDL_JoystickGetAxis(joystick, 0);
const Sint16 joystick_y = SDL_JoystickGetAxis(joystick, 1);
@ -46,17 +48,82 @@ BOOL ControllerBackend_GetJoystickStatus(JOYSTICK_STATUS *status)
status->bUp = joystick_y < joystick_neutral_y - DEADZONE;
status->bDown = joystick_y > joystick_neutral_y + DEADZONE;
// The original `Input.cpp` assumed there were 32 buttons (because of DirectInput's `DIJOYSTATE` struct)
int numButtons = SDL_JoystickNumButtons(joystick);
if (numButtons > 32)
numButtons = 32;
int total_buttons = SDL_JoystickNumButtons(joystick);
int total_axes = SDL_JoystickNumAxes(joystick);
int total_hats = SDL_JoystickNumHats(joystick);
// Read whatever buttons actually exist
for (int i = 0; i < numButtons; ++i)
status->bButton[i] = SDL_JoystickGetButton(joystick, i);
unsigned int buttons_done = 0;
for (int i = 0; i < total_buttons; ++i)
{
status->bButton[buttons_done] = SDL_JoystickGetButton(joystick, i);
if (++buttons_done < button_limit)
break;
}
for (int i = 0; i < total_axes && buttons_done < button_limit; ++i)
{
Sint16 axis = SDL_JoystickGetAxis(joystick, i);
status->bButton[buttons_done] = axis < -DEADZONE;
if (++buttons_done < button_limit)
break;
status->bButton[buttons_done] = axis > DEADZONE;
if (++buttons_done < button_limit)
break;
}
for (int i = 0; i < total_axes && buttons_done < button_limit; ++i)
{
Uint8 hat = SDL_JoystickGetHat(joystick, i);
status->bButton[buttons_done] = hat == SDL_HAT_UP;
if (++buttons_done < button_limit)
break;
status->bButton[buttons_done] = hat == SDL_HAT_RIGHT;
if (++buttons_done < button_limit)
break;
status->bButton[buttons_done] = hat == SDL_HAT_DOWN;
if (++buttons_done < button_limit)
break;
status->bButton[buttons_done] = hat == SDL_HAT_LEFT;
if (++buttons_done < button_limit)
break;
status->bButton[buttons_done] = hat == SDL_HAT_RIGHTUP;
if (++buttons_done < button_limit)
break;
status->bButton[buttons_done] = hat == SDL_HAT_RIGHTDOWN;
if (++buttons_done < button_limit)
break;
status->bButton[buttons_done] = hat == SDL_HAT_LEFTUP;
if (++buttons_done < button_limit)
break;
status->bButton[buttons_done] = hat == SDL_HAT_LEFTDOWN;
if (++buttons_done < button_limit)
break;
}
// Blank the buttons that do not
for (int i = numButtons; i < 32; ++i)
for (size_t i = buttons_done; i < button_limit; ++i)
status->bButton[i] = FALSE;
return TRUE;

2
src/Input.h
View file

@ -8,7 +8,7 @@ struct JOYSTICK_STATUS
BOOL bRight;
BOOL bUp;
BOOL bDown;
BOOL bButton[32];
BOOL bButton[32]; // The original `Input.cpp` assumed there were 32 buttons (because of DirectInput's `DIJOYSTATE` struct)
};
void ReleaseDirectInput(void);