👕 Spreadshirt Design Generator – PNG-Bulk-Erstellung

📊 Was das Tool macht

Aus einer CSV-Datei mit Vornamen werden vollautomatisch PNG-Designs in 9 Farbvarianten generiert. Jedes Bild ist exakt so groß wie der Text – kein Padding, transparent, mit Outline für beste Druckqualität.

💻 Echter Code aus dem Projekt

#!/usr/bin/env python3
from PIL import Image, ImageDraw, ImageFont

COLORS = {
    'rot': (255, 0, 0), 'blau': (0, 102, 255),
    'gruen': (0, 170, 0), 'gelb': (255, 215, 0),
    'orange': (255, 102, 0), 'lila': (153, 50, 204),
    'rosa': (255, 105, 180), 'schwarz': (0, 0, 0),
    'weiss': (255, 255, 255)
}
OUTLINE_WIDTH = 3
PADDING = 0  # Bildgröße = exakt Textgröße

def create_png(name, color_name, color_rgb, output_dir):
    text = f"Geburtstagskind {name}"
    font_size = 180
    font = ImageFont.truetype('arial.ttf', font_size)

    # Textgröße messen mit textbbox()
    temp_img = Image.new('RGB', (1000, 1000))
    temp_draw = ImageDraw.Draw(temp_img)
    bbox = temp_draw.textbbox((0, 0), text, font=font)
    
    left, top, right, bottom = bbox
    img_width = right - left
    img_height = bottom - top

    # Transparentes Bild
    img = Image.new('RGBA', (img_width, img_height), (0, 0, 0, 0))
    draw = ImageDraw.Draw(img)

    # Schwarzer Outline für alle Farben außer schwarz
    if color_name != 'schwarz':
        for adj_x in range(-OUTLINE_WIDTH, OUTLINE_WIDTH + 1):
            for adj_y in range(-OUTLINE_WIDTH, OUTLINE_WIDTH + 1):
                if adj_x != 0 or adj_y != 0:
                    draw.text((x + adj_x, y + adj_y), text, 
                             font=font, fill=(0, 0, 0, 255))

    # Text in Zielfarbe darüber
    draw.text((x, y), text, font=font, fill=(*color_rgb, 255))

    filename = f"{name}_{color_name}.png"
    img.save(os.path.join(output_dir, filename), 'PNG')

def process_csv(csv_file, output_dir='designs'):
    with open(csv_file, 'r', encoding='utf-8') as f:
        reader = csv.reader(f)
        names = [row[0].strip() for row in reader if row and row[0].strip()]

    print(f"Erstelle {len(names)} x {len(COLORS)} = "
          f"{len(names) * len(COLORS)} PNG-Dateien...")

    for name in names:
        safe_name = name.replace(' ', '_')
        for color_name, color_rgb in COLORS.items():
            create_png(safe_name, color_name, color_rgb, output_dir)

🎯 Business Value