scale parameter in screenshot breaks add_point_labels

[chapochn]

Describe the bug, what's wrong, and what you expected.

When putting the scale parameter in screenshot function to some integer different from 1, the labels generated by add_point_labels are not shown properly.

Steps to reproduce the bug.

This works fine (see first screenshot):

import pyvista as pv
import numpy as np
import matplotlib.pyplot as plt

pl = pv.Plotter()

n = 1
points = np.random.randn(n, 3)
labels = [str(i) for i in range(n)]
pl.add_point_labels(points ,labels, point_color='k', point_size=10)

pl.render()
pl.show()

img = pl.screenshot(return_img=True, scale=1)
plt.figure()
plt.imshow(img)
plt.show()

Changing the end to the follow, breaks the label (see second screenshot):

img = pl.screenshot(return_img=True, scale=2)
plt.figure()
plt.imshow(img)
plt.xlim(1000, 1100)
plt.ylim(700, 800)
plt.show()

System Information

--------------------------------------------------------------------------------
  Date: Fri Mar 08 12:45:25 2024 EST

                OS : Darwin
            CPU(s) : 12
           Machine : arm64
      Architecture : 64bit
               RAM : 32.0 GiB
       Environment : Jupyter
       File system : apfs
        GPU Vendor : Apple
      GPU Renderer : Apple M2 Pro
       GPU Version : 4.1 Metal - 88
  MathText Support : True

  Python 3.10.13 | packaged by conda-forge | (main, Dec 23 2023, 15:35:25)
  [Clang 16.0.6 ]

           pyvista : 0.43.3
               vtk : 9.2.6
             numpy : 1.26.4
        matplotlib : 3.8.3
            scooby : 0.9.2
             pooch : 1.8.1
            pillow : 10.2.0
           imageio : 2.34.0
         pyvistaqt : 0.11.0
             PyQt5 : 5.15.9
           IPython : 8.22.1
        ipywidgets : 8.1.2
             scipy : 1.12.0
              tqdm : 4.66.2
        jupyterlab : 4.1.2
             trame : 3.5.2
      trame_client : 2.16.0
      trame_server : 2.17.2
         trame_vtk : 2.8.5
     trame_vuetify : 2.4.2
      nest_asyncio : 1.6.0

Screenshots