ObjFW  Check-in [336ecd9bdc]

Overview
Comment:OFGameController: Support for pressure sensitivity
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SHA3-256: 336ecd9bdc597441560440f79ea358c508b148618ac337b0c515134010c56b06
User & Date: js on 2024-05-09 19:46:06
Other Links: branch diff | manifest | tags
Context
2024-05-09
19:47
Add subdir for interactive game controller tests check-in: 9e1ee38bda user: js tags: gamecontroller
19:46
OFGameController: Support for pressure sensitivity check-in: 336ecd9bdc user: js tags: gamecontroller
19:05
OFGameController: Add constants for buttons check-in: f02049612e user: js tags: gamecontroller
Changes
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Modified src/OFGameController.h from [174eaaf8eb] to [62ce0aa0c9].

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#ifdef OF_LINUX
	OFString *_path;
	int _fd;
	uint16_t _vendorID, _productID;
	OFString *_name;
	OFMutableSet *_buttons, *_pressedButtons;
	bool _hasLeftAnalogStick, _hasRightAnalogStick;
	bool _hasZLPressure, _hasZRPressure;
	OFPoint _leftAnalogStickPosition, _rightAnalogStickPosition;
	float _ZLPressure, _ZRPressure;
	int32_t _leftAnalogStickMinX, _leftAnalogStickMaxX;
	int32_t _leftAnalogStickMinY, _leftAnalogStickMaxY;
	int32_t _rightAnalogStickMinX, _rightAnalogStickMaxX;
	int32_t _rightAnalogStickMinY, _rightAnalogStickMaxY;
	int32_t _ZLMinPressure, _ZLMaxPressure, _ZRMinPressure, _ZRMaxPressure;
#endif
}

#ifdef OF_HAVE_CLASS_PROPERTIES
@property (class, readonly, nonatomic)
    OFArray <OFGameController *> *controllers;
#endif

/**
 * @brief The name of the controller.
 */
@property (readonly, nonatomic, copy) OFString *name;

/**
 * @brief The buttons the controller has.
 */
@property (readonly, nonatomic, copy) OFSet OF_GENERIC(OFString *) *buttons;
@property (readonly, nonatomic, copy)
    OFSet OF_GENERIC(OFGameControllerButton) *buttons;

/**
 * @brief The currently pressed buttons on the controller.
 */
@property (readonly, nonatomic, copy)
    OFSet OF_GENERIC(OFString *) *pressedButtons;
    OFSet OF_GENERIC(OFGameControllerButton) *pressedButtons;

/**
 * @brief Whether the controller has a left analog stick.
 */
@property (readonly, nonatomic) bool hasLeftAnalogStick;

/**
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 * @brief Returns the available controllers.
 *
 * @return The available controllers
 */
+ (OFArray OF_GENERIC(OFGameController *) *)controllers;

- (instancetype)init OF_UNAVAILABLE;

/**
 * @brief Returns how hard the specified button is pressed.
 *
 * The returned value is in the range from 0 to 1.
 *
 * @param button The button for which to return how hard it is pressed.
 * @return How hard the specified button is pressed
 */
- (float)pressureForButton: (OFGameControllerButton)button;
@end

OF_ASSUME_NONNULL_END

Modified src/OFGameController.m from [b3fdaf3904] to [c9aa070e37].

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	return [OFArray array];
}

- (instancetype)init
{
	OF_INVALID_INIT_METHOD
}

- (float)pressureForButton: (OFGameControllerButton)button
{
	return 0;
}
@end
#endif

Modified src/platform/Linux/OFGameController.m from [25579e0c0b] to [3d4dad17ed].

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static const uint16_t buttons[] = {
	BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_TL2,
	BTN_TR2, BTN_SELECT, BTN_START, BTN_MODE, BTN_THUMBL, BTN_THUMBR,
	BTN_DPAD_UP, BTN_DPAD_DOWN, BTN_DPAD_LEFT, BTN_DPAD_RIGHT
};

static OFString *
static OFGameControllerButton
buttonToName(uint16_t button, uint16_t vendorID, uint16_t productID)
{
	if (vendorID == vendorIDMicrosoft &&
	    productID == productIDXbox360Controller) {
		switch (button) {
		case BTN_C:
		case BTN_Z:
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		_name = [[OFString alloc] initWithCString: name
						 encoding: encoding];

		_buttons = [[OFMutableSet alloc] init];
		for (size_t i = 0; i < sizeof(buttons) / sizeof(*buttons);
		    i++) {
			OFString *buttonName =
			OFGameControllerButton buttonName =
			    buttonToName(buttons[i], _vendorID, _productID);

			if (buttonName != nil)
				[_buttons addObject: buttonName];
		}

		_pressedButtons = [[OFMutableSet alloc] init];
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				    OFGameControllerButtonDPadRight];
				[_buttons addObject:
				    OFGameControllerButtonDPadUp];
				[_buttons addObject:
				    OFGameControllerButtonDPadDown];
			}

			if (OFBitSetIsSet(absBits, ABS_Z))
			if (OFBitSetIsSet(absBits, ABS_Z)) {
				struct input_absinfo info;

				_hasZLPressure = true;

				if (ioctl(_fd, EVIOCGABS(ABS_Z), &info) == -1)
					@throw [OFInitializationFailedException
					    exception];

				_ZLMinPressure = info.minimum;
				_ZLMaxPressure = info.maximum;

				[_buttons addObject: OFGameControllerButtonZL];
			}

			if (OFBitSetIsSet(absBits, ABS_RZ))
			if (OFBitSetIsSet(absBits, ABS_RZ)) {
				struct input_absinfo info;

				_hasZRPressure = true;

				if (ioctl(_fd, EVIOCGABS(ABS_RZ), &info) == -1)
					@throw [OFInitializationFailedException
					    exception];

				_ZRMinPressure = info.minimum;
				_ZRMaxPressure = info.maximum;

				[_buttons addObject: OFGameControllerButtonZR];
			}
		}

		[_buttons makeImmutable];
	} @catch (id e) {
		[self release];
		@throw e;
	}
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}

- (void)of_processEvents
{
	struct input_event event;

	for (;;) {
		OFString *name;
		OFGameControllerButton name;

		errno = 0;

		if (read(_fd, &event, sizeof(event)) < (int)sizeof(event)) {
			if (errno == EWOULDBLOCK)
				return;
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					[_pressedButtons removeObject:
					    OFGameControllerButtonDPadUp];
					[_pressedButtons removeObject:
					    OFGameControllerButtonDPadDown];
				}
				break;
			case ABS_Z:
				if (event.value > 0)
				_ZLPressure = scale(event.value,
				    _ZLMinPressure, _ZLMaxPressure);

				if (_ZLPressure > 0)
					[_pressedButtons addObject:
					    OFGameControllerButtonZL];
				else
					[_pressedButtons removeObject:
					    OFGameControllerButtonZL];
				break;
			case ABS_RZ:
				if (event.value > 0)
				_ZRPressure = scale(event.value,
				    _ZRMinPressure, _ZRMaxPressure);

				if (_ZRPressure > 0)
					[_pressedButtons addObject:
					    OFGameControllerButtonZR];
				else
					[_pressedButtons removeObject:
					    OFGameControllerButtonZR];
				break;
			}
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}

- (OFPoint)rightAnalogStickPosition
{
	[self of_processEvents];
	return _rightAnalogStickPosition;
}

- (float)pressureForButton: (OFGameControllerButton)button
{
	if ([button isEqual: OFGameControllerButtonZL] && _hasZLPressure) {
		[self of_processEvents];
		return _ZLPressure;
	}

	if ([button isEqual: OFGameControllerButtonZR] && _hasZRPressure) {
		[self of_processEvents];
		return _ZRPressure;
	}

	return ([self.pressedButtons containsObject: button] ? 1 : 0);
}

- (OFString *)description
{
	return [OFString stringWithFormat: @"<%@: %@>", self.class, self.name];
}
@end

Modified src/platform/Nintendo3DS/OFGameController.m from [cde2b51e73] to [adf29c8c87].

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}

- (OFString *)name
{
	return @"Nintendo 3DS";
}

- (OFSet *)buttons
- (OFSet OF_GENERIC(OFGameControllerButton) *)buttons
{
	return [OFSet setWithObjects: OFGameControllerButtonA,
	    OFGameControllerButtonB, OFGameControllerButtonSelect,
	    OFGameControllerButtonStart, OFGameControllerButtonDPadRight,
	    OFGameControllerButtonDPadLeft, OFGameControllerButtonDPadUp,
	    OFGameControllerButtonDPadDown, OFGameControllerButtonR,
	    OFGameControllerButtonL, OFGameControllerButtonX,
	    OFGameControllerButtonY, OFGameControllerButtonZL,
	    OFGameControllerButtonZR, OFGameControllerButtonCPadRight,
	    OFGameControllerButtonCPadLeft, OFGameControllerButtonCPadUp,
	    OFGameControllerButtonCPadDown, nil];
}

- (OFSet *)pressedButtons
- (OFSet OF_GENERIC(OFGameControllerButton) *)pressedButtons
{
	OFMutableSet OF_GENERIC(OFGameControllerButton) *pressedButtons =
	OFMutableSet *pressedButtons = [OFMutableSet setWithCapacity: 18];
	    [OFMutableSet setWithCapacity: 18];
	u32 keys;

	hidScanInput();
	keys = hidKeysHeld();

	if (keys & KEY_A)
		[pressedButtons addObject: OFGameControllerButtonA];
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	circlePosition pos;
	hidCircleRead(&pos);

	return OFMakePoint(
	    (float)pos.dx / (pos.dx < 0 ? -INT16_MIN : INT16_MAX),
	    (float)pos.dy / (pos.dy < 0 ? -INT16_MIN : INT16_MAX));
}

- (float)pressureForButton: (OFGameControllerButton)button
{
	return ([self.pressedButtons containsObject: button] ? 1 : 0);
}

- (OFString *)description
{
	return [OFString stringWithFormat: @"<%@: %@>", self.class, self.name];
}
@end

Modified src/platform/NintendoDS/OFGameController.m from [3f4b233e3e] to [c449fe09b2].

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}

- (OFString *)name
{
	return @"Nintendo DS";
}

- (OFSet *)buttons
- (OFSet OF_GENERIC(OFGameControllerButton) *)buttons
{
	return [OFSet setWithObjects: OFGameControllerButtonA,
	    OFGameControllerButtonB, OFGameControllerButtonSelect,
	    OFGameControllerButtonStart, OFGameControllerButtonDPadRight,
	    OFGameControllerButtonDPadLeft, OFGameControllerButtonDPadUp,
	    OFGameControllerButtonDPadDown, OFGameControllerButtonR,
	    OFGameControllerButtonL, OFGameControllerButtonX,
	    OFGameControllerButtonY, nil];
}

- (OFSet *)pressedButtons
- (OFSet OF_GENERIC(OFGameControllerButton) *)pressedButtons
{
	OFMutableSet OF_GENERIC(OFGameControllerButton) *pressedButtons =
	OFMutableSet *pressedButtons = [OFMutableSet setWithCapacity: 12];
	    [OFMutableSet setWithCapacity: 12];
	uint32 keys;

	scanKeys();
	keys = keysCurrent();

	if (keys & KEY_A)
		[pressedButtons addObject: OFGameControllerButtonA];
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	return false;
}

- (bool)hasRightAnalogStick
{
	return false;
}

- (float)pressureForButton: (OFGameControllerButton)button
{
	return ([self.pressedButtons containsObject: button] ? 1 : 0);
}

- (OFString *)description
{
	return [OFString stringWithFormat: @"<%@: %@>", self.class, self.name];
}
@end

Modified tests/gamecontroller/GameControllerTests.m from [6a78591319] to [234ef24ee3].

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	[OFStdOut clear];

	for (;;) {
		[OFStdOut setCursorPosition: OFMakePoint(0, 0)];

		for (OFGameController *controller in controllers) {
			OFArray *buttons =
			OFArray OF_GENERIC(OFGameControllerButton) *buttons =
			    controller.buttons.allObjects.sortedArray;
			size_t i = 0;

			[OFStdOut setForegroundColor: [OFColor green]];
			[OFStdOut writeLine: controller.name];

			for (OFString *button in buttons) {
				bool pressed = [controller.pressedButtons
				    containsObject: button];
			for (OFGameControllerButton button in buttons) {
				float pressure =
				    [controller pressureForButton: button];

				if (pressure == 1)
				[OFStdOut setForegroundColor: (pressed
				    ? [OFColor yellow] : [OFColor gray])];
					[OFStdOut setForegroundColor:
					    [OFColor red]];
				else if (pressure > 0.5)
					[OFStdOut setForegroundColor:
					    [OFColor yellow]];
				else if (pressure > 0)
					[OFStdOut setForegroundColor:
					    [OFColor green]];
				else
					[OFStdOut setForegroundColor:
					    [OFColor gray]];

				[OFStdOut writeFormat: @"[%@]", button];

				if (++i == 5) {
					[OFStdOut writeString: @"\n"];
					i = 0;
				} else
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