GeezerVison

[2/4] Compiling C++ object src/ft2font.cpython-313-x86_64-linux-gnu.so.p/ft2font_wrapper.cpp.o
../../src/ft2font_wrapper.cpp: In lambda function:
../../src/ft2font_wrapper.cpp:1785:22: warning: unused variable ‘error’ [-Wunused-variable]
 1785 |             if (auto error = FT_Load_Glyph(face, idx, static_cast<FT_Int32>(flags))) {
      |                      ^~~~~
../../src/ft2font_wrapper.cpp:1788:22: warning: unused variable ‘error’ [-Wunused-variable]
 1788 |             if (auto error = FT_Render_Glyph(face->glyph, FT_RENDER_MODE_NORMAL)) {
      |                      ^~~~~
../../src/ft2font_wrapper.cpp: In lambda function:
../../src/ft2font_wrapper.cpp:1804:26: warning: unused variable ‘error’ [-Wunused-variable]
 1804 |                 if (auto error = FT_Glyph_To_Bitmap(&g, FT_RENDER_MODE_NORMAL, &origin, 1)) {
      |                          ^~~~~

$ pytest lib/matplotlib/tests/test_mathtext.py::test_mathtext_cmr10_minus_sign lib/matplotlib/tests/test_text.py::test_complex_shaping -v
=============================== test session starts ===============================
platform linux -- Python 3.13.11, pytest-8.3.3, pluggy-1.5.0 -- venv/bin/python
cachedir: .pytest_cache
rootdir: matplotlib
configfile: pyproject.toml
plugins: timeout-2.3.1, rerunfailures-14.0, cov-6.0.0, memray-1.7.0, anyio-4.10.0, xdist-3.8.0, xvfb-3.1.1
collected 5 items                                                                                                                                                                                                                                                                         

lib/matplotlib/tests/test_mathtext.py::test_mathtext_cmr10_minus_sign PASSED                                                                                                                                                                                                        [ 20%]
lib/matplotlib/tests/test_text.py::test_complex_shaping[png] PASSED                                                                                                                                                                                                                 [ 40%]
lib/matplotlib/tests/test_text.py::test_complex_shaping[pdf] FAILED                                                                                                                                                                                                                 [ 60%]
lib/matplotlib/tests/test_text.py::test_complex_shaping[svg] PASSED                                                                                                                                                                                                                 [ 80%]
lib/matplotlib/tests/test_text.py::test_complex_shaping[eps] FAILED                                                                                                                                                                                                                 [100%]

==================================== FAILURES =====================================
______________________________________________ test_complex_shaping[pdf] _____________________________

args = (), kwds = {'extension': 'pdf', 'request': <FixtureRequest for <Function test_complex_shaping[pdf]>>}

    @wraps(func)
    def inner(*args, **kwds):
        with self._recreate_cm():
>           return func(*args, **kwds)
E           matplotlib.testing.exceptions.ImageComparisonFailure: images not close (RMS 28.259):
E           	result_images/test_text/complex_pdf.png
E           	result_images/test_text/complex-expected_pdf.png
E           	result_images/test_text/complex_pdf-failed-diff.png

/usr/lib64/python3.13/contextlib.py:85: ImageComparisonFailure
______________________________________________ test_complex_shaping[eps] _____________________________

args = (), kwds = {'extension': 'eps', 'request': <FixtureRequest for <Function test_complex_shaping[eps]>>}

    @wraps(func)
    def inner(*args, **kwds):
        with self._recreate_cm():
>           return func(*args, **kwds)
E           matplotlib.testing.exceptions.ImageComparisonFailure: images not close (RMS 28.222):
E           	result_images/test_text/complex_eps.png
E           	result_images/test_text/complex-expected_eps.png
E           	result_images/test_text/complex_eps-failed-diff.png

/usr/lib64/python3.13/contextlib.py:85: ImageComparisonFailure
============================= short test summary info =============================
FAILED lib/matplotlib/tests/test_text.py::test_complex_shaping[pdf] - matplotlib.testing.exceptions.ImageComparisonFailure: images not close (RMS 28.259):
FAILED lib/matplotlib/tests/test_text.py::test_complex_shaping[eps] - matplotlib.testing.exceptions.ImageComparisonFailure: images not close (RMS 28.222):
=========================== 2 failed, 3 passed in 2.62s ===========================

diff --git a/lib/matplotlib/backends/backend_pdf.py b/lib/matplotlib/backends/backend_pdf.py
index c6b7cf0ac9..813d4a73ff 100644
--- a/lib/matplotlib/backends/backend_pdf.py
+++ b/lib/matplotlib/backends/backend_pdf.py
@@ -598,6 +598,8 @@ class Stream:
 
 def _get_pdf_charprocs(font_path, glyph_indices):
     font = get_font(font_path, hinting_factor=1)
+    hf = font._hinting_factor
+    font._set_transform([[round(0x10000 / hf), 0], [0, 0x10000]], [0, 0])
     conv = 1000 / font.units_per_EM  # Conversion to PS units (1/1000's).
     procs = {}
     for glyph_index in glyph_indices:
@@ -1121,6 +1123,8 @@ end"""
     def embedTTF(self, filename, subset_index, charmap):
         """Embed the TTF font from the named file into the document."""
         font = get_font(filename)
+        hf = font._hinting_factor
+        font._set_transform([[round(0x10000 / hf), 0], [0, 0x10000]], [0, 0])
         fonttype = mpl.rcParams['pdf.fonttype']
 
         def cvt(length, upe=font.units_per_EM, nearest=True):