class Chip8Widget(QWidget):
def __init__(self, machine: Machine, sound: bool=False, instruction_per_second: int = 500):
super().__init__()
self._machine = machine
self.init_ui()
self._sound = QSound('beep.wav')
self._sound_support = sound
self._machine_update_timer = Timer(interval=1.0 / instruction_per_second)
self._machine_update_timer.add_handler(self._execute_instruction)
self._machine_update_timer.start()
self._machine_sound_delay_timer = Timer(interval=1.0 / 60) # 60 Hz
self._machine_sound_delay_timer.add_handler(self._update_sound_delay)
self._machine_sound_delay_timer.start()
self._key_dict = {
Qt.Key_1: 1, Qt.Key_2: 2, Qt.Key_3: 3, Qt.Key_4: 0xC,
Qt.Key_Q: 4, Qt.Key_W: 5, Qt.Key_E: 6, Qt.Key_R: 0xD,
Qt.Key_A: 7, Qt.Key_S: 8, Qt.Key_D: 9, Qt.Key_F: 0xE,
Qt.Key_Z: 0xA, Qt.Key_X: 0x0, Qt.Key_C: 0xB, Qt.Key_V: 0xF
}
def init_ui(self):
screen = Chip8ScreenWidget(self._machine.Screen, self)
self.setWindowTitle('Chip 8')
self.show()
def keyPressEvent(self, event: QtGui.QKeyEvent):
if event.key() in self._key_dict:
self._machine.Keyboard.key_down(self._key_dict[event.key()])
def keyReleaseEvent(self, event: QtGui.QKeyEvent):
if event.key() in self._key_dict:
self._machine.Keyboard.key_up(self._key_dict[event.key()])
def _execute_instruction(self):
self._machine.execute_next_instruction()
def _update_sound_delay(self):
if self._machine.SoundTimer.get_count() != 0 and self._sound_support:
self._sound.play()
self._machine.DelayTimer.decrease()
self._machine.SoundTimer.decrease()
class Chip8ScreenWidget(QWidget):
def __init__(self, screen: Screen, parent: QWidget = None):
super().__init__(parent)
self._screen = screen
screen_size = QDesktopWidget().screenGeometry(-1)
self._pixel_width = int(screen_size.width() * 1 / 100)
self._pixel_height = self._pixel_width
self.init_ui()
self._draw_timer = Timer(interval=1.0 / 30)
self._draw_timer.add_handler(self._draw_screen_event)
self._draw_timer.start()
def init_ui(self):
self.setFixedSize(self._screen.width() * self._pixel_width,
self._screen.height() * self._pixel_height)
self.show()
def paintEvent(self, e):
qp = QPainter()
qp.begin(self)
self._draw_screen(qp)
qp.end()
def keyPressEvent(self, a0: QtGui.QKeyEvent):
self.parent().keyPressEvent(a0)
def _draw_screen_event(self):
self.update()
def _draw_screen(self, qp):
qp.setPen(QColor(0, 0, 0))
for y in range(self._screen.height()):
for x in range(self._screen.width()):
self._draw_pixel(y, x, qp)
def _draw_pixel(self, y, x, qp):
qp.fillRect(
x * self._pixel_width, y * self._pixel_height, self._pixel_width,
self._pixel_height,
QColor(0, 0, 0) if self._screen.get_pixel(y, x) == 0 else QColor(
255, 255, 255))
class Chip8MachineStateWidget(QWidget):
def __init__(self, machine: Machine, parent: QWidget=None):
super().__init__(parent)
self._machine = machine
self._init_ui()
self._draw_timer = Timer(interval=1.0 / 30)
self._draw_timer.add_handler(self._draw_state_event)
self._draw_timer.start()
self._instruction_factory = InstructionFactory()
def _init_ui(self):
screen_size = QDesktopWidget().screenGeometry(-1)
self._pixel_width = int(screen_size.width() * 1 / 100)
self._pixel_height = self._pixel_width
self.setFixedHeight(self._pixel_height * 32)
self.setFixedWidth(self._pixel_width * 35)
self._text_size = int(self._pixel_height * 0.7)
self.show()
def paintEvent(self, e):
qp = QPainter()
qp.begin(self)
self._draw_state(qp)
qp.end()
def _draw_state_event(self):
self.update()
def keyPressEvent(self, a0: QtGui.QKeyEvent):
self.parent().keyPressEvent(a0)
def _draw_state(self, qp):
qp.setFont(QFont('Noto Sans', self._text_size))
t = self._text_size // 2
qp.drawText(0, self._text_size, 'V: {}'.format(list(map(to_hex, self._machine.VRegisters))))
qp.drawText(0, 2 * self._text_size + t, 'PC: {}, I: {}, DT: {}, ST: {}'
.format(to_hex(self._machine.PC),
to_hex(self._machine.AddressRegister),
to_hex(self._machine.DelayTimer.get_count()),
to_hex(self._machine.SoundTimer.get_count())))
qp.drawText(0, 3 * self._text_size + 2 * t, 'Stack: {}'.format(list(map(to_hex, self._machine.Stack.items()))))
qp.drawText(0, 4 * self._text_size + 3 * t, 'Memory at 10-radius of PC:')
y = 5 * self._text_size + 4 * t
for i in range(-10, 11):
index = self._machine.PC + i * 2
if index < 0 or index > self._machine.MemorySize:
qp.drawText(0, y, '')
continue
opcode = self._get_opcode_at(index)
try:
instruction = self._instruction_factory.from_opcode(opcode)
qp.drawText(0, y, '{}{} : {}, {} {} {}'
.format('-> ' if i == 0 else ' ',
to_hex(index),
list(map(to_hex, opcode)),
instruction.__class__.__name__,
list((map(to_hex, instruction.arg_registers))),
to_hex(instruction.arg_constant) if instruction.arg_constant is not None else '-'))
except InstructionFactoryError:
qp.drawText(0, y, '{}{} : {}, [unknown]'
.format('-> ' if i == 0 else ' ',
to_hex(index),
list(map(to_hex, opcode))))
y += self._text_size + t
qp.drawText(0, y, 'Machine blocked' if self._machine.Block else 'Machine not blocked')
def _get_opcode_at(self, i):
return bytearray([self._machine.Memory[i], self._machine.Memory[i + 1]])