from PIL import Image

def remove_checkerboard(input_path, output_path):
    """Remove gray/white checkerboard pattern and make background transparent"""
    
    img = Image.open(input_path).convert('RGBA')
    pixels = img.load()
    width, height = img.size
    
    print(f"Image size: {width}x{height}")
    
    modified = 0
    for y in range(height):
        for x in range(width):
            r, g, b, a = pixels[x, y]
            
            # Skip if already transparent
            if a == 0:
                continue
            
            # Check if pixel is grayscale (R ≈ G ≈ B)
            is_grayscale = abs(r - g) < 20 and abs(g - b) < 20 and abs(r - b) < 20
            brightness = (r + g + b) / 3
            
            should_remove = False
            
            # Remove checkerboard grays (common values: 204, 153, 192, 128, 255)
            if is_grayscale and brightness > 100:
                should_remove = True
            
            # Remove very bright pixels
            if brightness > 200:
                should_remove = True
            
            # Remove pure white
            if r > 240 and g > 240 and b > 240:
                should_remove = True
            
            if should_remove:
                pixels[x, y] = (r, g, b, 0)  # Make transparent
                modified += 1
    
    img.save(output_path, 'PNG')
    print(f"✅ Processed! Removed {modified} background pixels")
    print(f"📁 Saved to: {output_path}")

if __name__ == "__main__":
    # Use the ORIGINAL image you uploaded
    input_file = r"C:\Users\hipod\.gemini\antigravity\brain\70050185-4972-4413-9765-559b6f2ad1cc\uploaded_image_1765710182006.jpg"
    output_file = r"c:\novafarma\assets\sprites\player_walking_clean.png"
    
    remove_checkerboard(input_file, output_file)