Cursor gets included by default in screenshot

[vpdc]

I've checked the screenshots made by MSS, and it seems to include the cursor by default.

In the docs:

__init__(compression_level=6, display=None, max_displays=32, with_cursor=False)

the default should be false but it didn't seem to follow it.
I think this only happens when a region to capture has been specified.

[BoboTiG]

I can't see where such a behaviour would happen. The source code seems correct, and the cursor is not enabled by default.

Can you share a minimal reproduction code, please?

[vpdc]

import time
import mss
import cv2 as cv
import numpy as np
import pyautogui

from helpers.focus_app import focus_app
from helpers.app_finder import get_window_bounds

def test():
  print()
  sct = mss.mss()
  focus_app('Notes')
  bounds = get_window_bounds('Notes')
  screenshot = sct.grab(bounds)
  img = np.asarray(screenshot)
  cv.imshow('ss', img)
  cv.waitKey()

test()

# focus_app.py

import subprocess

def focus_app(app_name):
    script = f'tell application "{app_name}" to activate'
    subprocess.run(["osascript", "-e", script])

# app_finder.py

import Quartz
from mss.models import Monitor

def get_window_bounds(app_name: str) -> Monitor:
    windows = Quartz.CGWindowListCopyWindowInfo(
        Quartz.kCGWindowListOptionOnScreenOnly,
        Quartz.kCGNullWindowID
    )

    for window in windows:
        if app_name.lower() in window.get('kCGWindowOwnerName', '').lower():
            bounds = window['kCGWindowBounds']
            key_map = {"Y": "top", "X": "left", "Width": "width", "Height": "height"}
            return {v: bounds[k] for k, v in key_map.items()}
        
    return None

[vpdc]

I'll send the steps to reproduce the bug shortly

[vpdc]

Steps to reproduce:

1. Click Notes app to focus
2. Switch to VSCode using CMD + tab
3. Execute code

Here's a demo video: https://streamable.com/2r1ikr

[BoboTiG]

Actually, cursor grabbing is not yet implemented on macOS (cf

python-mss/src/mss/darwin.py

Line 217 in a086a5c

return None

) 🤔

I see that macOS will show the cursor whatever we set in MSS (it's done like that at the lower level). There is an API to change that: https://stackoverflow.com/a/49035515/1117028

[vpdc]

Actually, the cursor doesn't show up unless I follow the steps above. I notice just now when reproducing the bug.

If I use pyautogui to move the cursor to Notes app, it doesn't get included in the screenshot, which is quite weird.

[BoboTiG]

Right after the line sct = mss.mss(), can you add this one and tell us the output: print("MSS with_cursor:", sct.with_cursor)?

[vpdc]

Right after the line sct = mss.mss(), can you add this one and tell us the output: print("MSS with_cursor:", sct.with_cursor)?

MSS with_cursor: False