Update pptx2png.py

pptx2png.py

@@ -131,9 +131,10 @@ def render_images_with_skia(images, slide_dimensions, output_dir):
             # Save the canvas to a file
             output_path = os.path.join(output_dir, f'slide_{i+1}.png')
             surface.makeImageSnapshot().save(output_path, skia.kPNG)
+    return output_path
 
 if __name__ == "__main__":
     pptx_path = 'templates_from_gaoding/ppt/1.pptx'  # Replace with your .pptx file path
     output_dir = 'output_slides'  # Directory to save the rendered images
     images, slide_dimensions = pptx_to_images(pptx_path)
-    render_images_with_skia(images, slide_dimensions, output_dir)
+    output_path = render_images_with_skia(images, slide_dimensions, output_dir)