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#!/usr/bin/env python3
import sys
import os
from PIL import Image, ImageQt
from PyQt6.QtWidgets import (
QApplication, QWidget, QLabel, QPushButton,
QSpinBox, QSlider, QComboBox, QFileDialog,
QMessageBox, QGridLayout, QHBoxLayout, QVBoxLayout,
)
from PyQt6.QtCore import Qt
from PyQt6.QtGui import QPixmap, QFontDatabase
def load_external_font():
base_dir = os.path.dirname(os.path.abspath(__file__))
font_path = os.path.join(base_dir, "fonts", "MorePerfectDOSVGA.ttf")
if not os.path.isfile(font_path):
print(f"[warn] Font file not found: {font_path}")
return None
font_id = QFontDatabase.addApplicationFont(font_path)
if font_id == -1:
print(f"[warn] Failed to load font from {font_path}")
return None
family = QFontDatabase.applicationFontFamilies(font_id)[0]
print(f"Loaded font family from file: {family}")
return family
DARK_STYLE = """
QWidget {
background-color: #121212;
color: #e0e0e0;
font-size: 13px;
}
QSpinBox, QSlider, QComboBox {
background-color: #1e1e1e;
border: 1px solid #333;
padding: 4px;
min-height: 26px;
max-width: 140px;
selection-background-color: #444;
selection-color: #eee;
}
QPushButton {
background-color: #2e2e2e;
border: 1px solid #555;
padding: 6px 12px;
min-height: 26px;
min-width: 100px;
}
QPushButton:hover {
background-color: #444;
}
QLabel {
padding-right: 6px;
}
QSlider::groove:horizontal {
height: 6px;
background: #333;
border-radius: 0px;
}
QSlider::handle:horizontal {
background: #555;
border: 1px solid #666;
width: 14px;
margin: -5px 0;
border-radius: 0px;
}
QComboBox, QSpinBox {
border-radius: 0px;
}
"""
def generate_ansi_256():
palette = []
palette.extend([
(0, 0, 0), (128, 0, 0), (0, 128, 0), (128, 128, 0),
(0, 0, 128), (128, 0, 128), (0, 128, 128), (192, 192, 192),
(128, 128, 128), (255, 0, 0), (0, 255, 0), (255, 255, 0),
(0, 0, 255), (255, 0, 255), (0, 255, 255), (255, 255, 255),
])
levels = [0, 95, 135, 175, 215, 255]
for r in levels:
for g in levels:
for b in levels:
palette.append((r, g, b))
for i in range(24):
gray = 8 + i * 10
palette.append((gray, gray, gray))
return palette[:256]
def create_palette(colors):
palette = []
for r, g, b in colors:
palette.extend([r, g, b])
while len(palette) < 768:
palette.extend([0, 0, 0])
return palette
def pixelate_and_reduce_colors(image, width, block_scale, dither, palette_type):
aspect = image.size[1] / image.size[0]
height = int(width * aspect)
block_size = max(1, int(width * (block_scale / 100.0)))
block_width = max(1, width // block_size)
block_height = max(1, height // block_size)
image = image.resize((block_width, block_height), Image.NEAREST).convert('RGB')
if palette_type == 'full':
return image.resize((block_width * block_size, block_height * block_size), Image.NEAREST).convert('RGB')
if palette_type == 'ansi256':
colors = generate_ansi_256()
elif palette_type == 'ansi16':
colors = generate_ansi_256()[:16]
else:
raise ValueError(f'[err] unknown palette type: {palette_type}')
pal_image = Image.new('P', (1, 1))
pal_image.putpalette(create_palette(colors))
dither_mode = {'floyd': Image.FLOYDSTEINBERG, 'ordered': Image.NONE}[dither]
image = image.quantize(colors=len(colors), palette=pal_image, method=Image.LIBIMAGEQUANT, dither=dither_mode)
return image.resize((block_width * block_size, block_height * block_size), Image.NEAREST).convert('RGB')
class PixelateGUI(QWidget):
PREVIEW_WIDTH = 500
PREVIEW_HEIGHT = 400
def __init__(self):
super().__init__()
self.setWindowTitle("pixelart")
self.setFixedSize(850, 420)
font_family = load_external_font()
if not font_family:
if sys.platform.startswith('win'):
font_family = "Segoe UI"
elif sys.platform.startswith('darwin'):
font_family = "Helvetica"
else:
font_family = "Sans Serif"
print(f"Using fallback font: {font_family}")
self.setStyleSheet(f"font-family: '{font_family}';" + DARK_STYLE)
# Controls
self.width_spin = QSpinBox()
self.width_spin.setRange(1, 2000)
self.width_spin.setValue(800)
self.width_spin.setButtonSymbols(QSpinBox.ButtonSymbols.NoButtons)
self.width_spin.setFixedWidth(120)
self.block_slider = QSlider(Qt.Orientation.Horizontal)
self.block_slider.setRange(10, 1000)
self.block_slider.setValue(100)
self.block_slider.setFixedWidth(120)
self.block_label = QLabel("block scale: 1.00%")
self.block_label.setAlignment(Qt.AlignmentFlag.AlignLeft)
self.dither_combo = QComboBox()
self.dither_combo.addItems(['floyd', 'ordered'])
self.dither_combo.setFixedWidth(120)
self.palette_combo = QComboBox()
self.palette_combo.addItems(['ansi16', 'ansi256', 'full'])
self.palette_combo.setFixedWidth(120)
self.btn_browse = QPushButton("browse image")
self.btn_save = QPushButton("save image")
self.btn_browse.setMinimumSize(100, 26)
self.btn_save.setMinimumSize(100, 26)
# Preview
self.preview_label = QLabel()
self.preview_label.setFixedSize(self.PREVIEW_WIDTH, self.PREVIEW_HEIGHT)
self.preview_label.setAlignment(Qt.AlignmentFlag.AlignTop | Qt.AlignmentFlag.AlignHCenter)
self.preview_label.setText("load an image")
preview_margin = 10
self.preview_label.setContentsMargins(preview_margin, 0, preview_margin, preview_margin)
self.preview_label.setStyleSheet(f"""
border: 1px solid #333;
background: #1e1e1e;
margin-left: {preview_margin}px;
margin-right: {preview_margin}px;
margin-bottom: {preview_margin}px;
""")
self.pixelated_image = None
self.original_image = None
# Layout
controls_grid = QGridLayout()
controls_grid.setHorizontalSpacing(15)
controls_grid.setVerticalSpacing(10)
controls_grid.addWidget(QLabel("width:"), 0, 0, alignment=Qt.AlignmentFlag.AlignLeft)
controls_grid.addWidget(self.width_spin, 0, 1, alignment=Qt.AlignmentFlag.AlignRight)
controls_grid.addWidget(self.block_label, 1, 0, alignment=Qt.AlignmentFlag.AlignLeft)
controls_grid.addWidget(self.block_slider, 1, 1, alignment=Qt.AlignmentFlag.AlignRight)
controls_grid.addWidget(QLabel("dither:"), 2, 0, alignment=Qt.AlignmentFlag.AlignLeft)
controls_grid.addWidget(self.dither_combo, 2, 1, alignment=Qt.AlignmentFlag.AlignRight)
controls_grid.addWidget(QLabel("palette:"), 3, 0, alignment=Qt.AlignmentFlag.AlignLeft)
controls_grid.addWidget(self.palette_combo, 3, 1, alignment=Qt.AlignmentFlag.AlignRight)
controls_grid.addWidget(self.btn_browse, 4, 1, alignment=Qt.AlignmentFlag.AlignRight)
controls_grid.addWidget(self.btn_save, 5, 1, alignment=Qt.AlignmentFlag.AlignRight)
controls_grid.setRowStretch(6, 1)
main_layout = QHBoxLayout(self)
main_layout.addLayout(controls_grid)
main_layout.addWidget(self.preview_label)
# Connect signals
self.btn_browse.clicked.connect(self.browse_file)
self.btn_save.clicked.connect(self.save_image)
self.width_spin.valueChanged.connect(self.update_preview)
self.block_slider.valueChanged.connect(self.on_block_slider_change)
self.dither_combo.currentIndexChanged.connect(self.update_preview)
self.palette_combo.currentIndexChanged.connect(self.update_preview)
def on_block_slider_change(self, value):
percent = value / 100.0
self.block_label.setText(f"Block Scale: {percent:.2f}%")
self.update_preview()
def browse_file(self):
path, _ = QFileDialog.getOpenFileName(self, "Select Image", "", "Images (*.png *.jpg *.bmp *.gif)")
if path:
self.original_image = Image.open(path).convert('RGBA')
self.update_preview()
def save_image(self):
if self.pixelated_image is None:
QMessageBox.warning(self, "Warning", "No pixelated image to save!")
return
path, _ = QFileDialog.getSaveFileName(self, "Save Image As", "output.png", "PNG Files (*.png)")
if path:
try:
os.makedirs(os.path.dirname(path), exist_ok=True)
self.pixelated_image.save(path)
QMessageBox.information(self, "Success", f"Image saved to:\n{path}")
except Exception as e:
QMessageBox.critical(self, "Error", f"Failed to save image:\n{e}")
def update_preview(self):
if self.original_image is None:
self.preview_label.setText("load an image first")
self.pixelated_image = None
return
width = self.width_spin.value()
block_scale = self.block_slider.value() / 100.0
dither = self.dither_combo.currentText()
palette_type = self.palette_combo.currentText()
try:
pixelated = pixelate_and_reduce_colors(
self.original_image, width, block_scale, dither, palette_type
)
self.pixelated_image = pixelated
qimg = ImageQt.ImageQt(pixelated)
pixmap = QPixmap.fromImage(qimg)
self.preview_label.setPixmap(pixmap.scaled(
self.preview_label.size(),
Qt.AspectRatioMode.KeepAspectRatio,
Qt.TransformationMode.SmoothTransformation,
))
except Exception as e:
self.preview_label.setText(f"Error processing image:\n{e}")
self.pixelated_image = None
if __name__ == "__main__":
app = QApplication(sys.argv)
window = PixelateGUI()
window.show()
sys.exit(app.exec())
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