Can you write a script which saves the contents of the currently active view window 
to an image file (e.g., PNG, JPG, TIFF) with specified resolution? 

from MSPyBentley import *
from MSPyECObjects import *
from MSPyBentleyGeom import *
from MSPyDgnPlatform import *
from MSPyDgnView import *
from MSPyMstnPlatform import *

import os
import tkinter as tk
from tkinter import filedialog, simpledialog, messagebox


def save_active_view_to_image(file_format='PNG', width=1024, height=768):
    """
    Saves the contents of the currently active view window to an image file with specified 
    resolution and format.
    Supported formats: PNG, JPG, TIFF.
    """
    # Get the active view set and selected viewport
    vSet = IViewManager.GetActiveViewSet()
    viewport = vSet.GetSelectedViewport()
    if viewport is None:
        print("No view selected!")
        return

    viewIndex = viewport.GetViewNumber()

    # Define the image size
    imageSize = Point2d()
    imageSize.x = width
    imageSize.y = height

    # Map file format string to ImageFileFormat enum
    fmt = file_format.upper()
    if fmt == 'PNG':
        imageFileFormat = ImageFileFormat.eIMAGEFILE_PNG
        ext = '.png'
    elif fmt == 'JPG' or fmt == 'JPEG':
        imageFileFormat = ImageFileFormat.eIMAGEFILE_JPEG
        ext = '.jpg'
    elif fmt == 'TIFF':
        imageFileFormat = ImageFileFormat.eIMAGEFILE_TIFF
        ext = '.tiff'
    else:
        print("Unsupported file format!")
        return

    # Prompt user for save location
    root = tk.Tk()
    root.withdraw()
    file_path = filedialog.asksaveasfilename(
        defaultextension=ext,
        filetypes=[(f"{fmt} files", f"*{ext}"), ("All files", "*.*")]
    )
    if not file_path:
        print("Save cancelled.")
        return

    # Delete file if it already exists
    if os.path.exists(file_path):
        os.remove(file_path)

    # Save the view screenshot to the image file
    retVal = MstnImage.saveView(file_path, imageSize, MSRenderMode.eConstantShade, imageFileFormat, 
                                False, False, viewIndex)

    if BentleyStatus.eSUCCESS == retVal:
        print(f"Image saved successfully at {file_path}")
    else:
        print("Failed to save view screenshot as an image")

def main():
    root = tk.Tk()
    root.withdraw()
    fmt = simpledialog.askstring("Image Format", "Enter image format (PNG, JPG, TIFF):", initialvalue="PNG")
    if not fmt:
        print("No format entered. Exiting.")
        exit()
    width = simpledialog.askinteger("Width", "Enter image width (pixels):", initialvalue=1024, minvalue=1)
    height = simpledialog.askinteger("Height", "Enter image height (pixels):", initialvalue=768, minvalue=1)
    if not width or not height:
        print("Invalid dimensions. Exiting.")
        exit()
    save_active_view_to_image(fmt, width, height)


# Example usage: prompt user for format and resolution, then save
if __name__ == "__main__":
    main()