From b5f00d5272129c7890b7813d9a8083c1aac9c3fc Mon Sep 17 00:00:00 2001 From: Elliott Sales de Andrade Date: Fri, 22 Jul 2022 16:00:08 -0400 Subject: [PATCH] Backport PR #23476: FIX: reset to original DPI in getstate Merge pull request #23476 from tacaswell/fix/unpickle_dpi FIX: reset to original DPI in getstate (cherry picked from commit 330124862b46dc003ff3e38427efcc9000b9d7ab) --- lib/matplotlib/figure.py | 3 +++ lib/matplotlib/tests/test_figure.py | 9 +++++++++ 2 files changed, 12 insertions(+) diff --git a/lib/matplotlib/figure.py b/lib/matplotlib/figure.py index 44f62436fb6d..d114801ea12f 100644 --- a/lib/matplotlib/figure.py +++ b/lib/matplotlib/figure.py @@ -2886,6 +2886,9 @@ def __getstate__(self): # Set cached renderer to None -- it can't be pickled. state["_cachedRenderer"] = None + # discard any changes to the dpi due to pixel ratio changes + state["_dpi"] = state.get('_original_dpi', state['_dpi']) + # add version information to the state state['__mpl_version__'] = mpl.__version__ diff --git a/lib/matplotlib/tests/test_figure.py b/lib/matplotlib/tests/test_figure.py index 05d1d2ae82c4..966f127df6ff 100644 --- a/lib/matplotlib/tests/test_figure.py +++ b/lib/matplotlib/tests/test_figure.py @@ -1,6 +1,7 @@ from datetime import datetime import io from pathlib import Path +import pickle import platform from threading import Timer from types import SimpleNamespace @@ -1360,3 +1361,11 @@ def test_kwargs_pass(): assert fig.get_label() == 'whole Figure' assert sub_fig.get_label() == 'sub figure' + + +def test_unpickle_with_device_pixel_ratio(): + fig = Figure(dpi=42) + fig.canvas._set_device_pixel_ratio(7) + assert fig.dpi == 42*7 + fig2 = pickle.loads(pickle.dumps(fig)) + assert fig2.dpi == 42 pFad - Phonifier reborn

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