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# -*- encoding: utf-8 -*-
from __future__ import (absolute_import, division, print_function,
unicode_literals)
import six
import io
import os
import tempfile
import pytest
import numpy as np
from matplotlib import checkdep_usetex, cm, rcParams
from matplotlib.backends.backend_pdf import PdfPages
from matplotlib import pyplot as plt
from matplotlib.testing.determinism import (_determinism_source_date_epoch,
_determinism_check)
from matplotlib.testing.decorators import image_comparison
from matplotlib import dviread
from matplotlib.testing.compare import compare_images
import matplotlib as mpl
needs_usetex = pytest.mark.xfail(
not checkdep_usetex(True),
reason="This test needs a TeX installation")
@image_comparison(baseline_images=['pdf_use14corefonts'],
extensions=['pdf'])
def test_use14corefonts():
rcParams['pdf.use14corefonts'] = True
rcParams['font.family'] = 'sans-serif'
rcParams['font.size'] = 8
rcParams['font.sans-serif'] = ['Helvetica']
rcParams['pdf.compression'] = 0
text = '''A three-line text positioned just above a blue line
and containing some French characters and the euro symbol:
"Merci pépé pour les 10 €"'''
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)
ax.set_title('Test PDF backend with option use14corefonts=True')
ax.text(0.5, 0.5, text, horizontalalignment='center',
verticalalignment='bottom',
fontsize=14)
ax.axhline(0.5, linewidth=0.5)
def test_type42():
rcParams['pdf.fonttype'] = 42
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot([1, 2, 3])
fig.savefig(io.BytesIO())
def test_multipage_pagecount():
with PdfPages(io.BytesIO()) as pdf:
assert pdf.get_pagecount() == 0
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot([1, 2, 3])
fig.savefig(pdf, format="pdf")
assert pdf.get_pagecount() == 1
pdf.savefig()
assert pdf.get_pagecount() == 2
def test_multipage_keep_empty():
from matplotlib.backends.backend_pdf import PdfPages
from tempfile import NamedTemporaryFile
# test empty pdf files
# test that an empty pdf is left behind with keep_empty=True (default)
with NamedTemporaryFile(delete=False) as tmp:
with PdfPages(tmp) as pdf:
filename = pdf._file.fh.name
assert os.path.exists(filename)
os.remove(filename)
# test if an empty pdf is deleting itself afterwards with keep_empty=False
with PdfPages(filename, keep_empty=False) as pdf:
pass
assert not os.path.exists(filename)
# test pdf files with content, they should never be deleted
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot([1, 2, 3])
# test that a non-empty pdf is left behind with keep_empty=True (default)
with NamedTemporaryFile(delete=False) as tmp:
with PdfPages(tmp) as pdf:
filename = pdf._file.fh.name
pdf.savefig()
assert os.path.exists(filename)
os.remove(filename)
# test that a non-empty pdf is left behind with keep_empty=False
with NamedTemporaryFile(delete=False) as tmp:
with PdfPages(tmp, keep_empty=False) as pdf:
filename = pdf._file.fh.name
pdf.savefig()
assert os.path.exists(filename)
os.remove(filename)
def test_composite_image():
# Test that figures can be saved with and without combining multiple images
# (on a single set of axes) into a single composite image.
X, Y = np.meshgrid(np.arange(-5, 5, 1), np.arange(-5, 5, 1))
Z = np.sin(Y ** 2)
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)
ax.set_xlim(0, 3)
ax.imshow(Z, extent=[0, 1, 0, 1])
ax.imshow(Z[::-1], extent=[2, 3, 0, 1])
plt.rcParams['image.composite_image'] = True
with PdfPages(io.BytesIO()) as pdf:
fig.savefig(pdf, format="pdf")
assert len(pdf._file._images) == 1
plt.rcParams['image.composite_image'] = False
with PdfPages(io.BytesIO()) as pdf:
fig.savefig(pdf, format="pdf")
assert len(pdf._file._images) == 2
def test_source_date_epoch():
"""Test SOURCE_DATE_EPOCH support for PDF output"""
_determinism_source_date_epoch("pdf", b"/CreationDate (D:20000101000000Z)")
def test_determinism_plain():
"""Test for reproducible PDF output: simple figure"""
_determinism_check('', format="pdf")
def test_determinism_images():
"""Test for reproducible PDF output: figure with different images"""
_determinism_check('i', format="pdf")
def test_determinism_hatches():
"""Test for reproducible PDF output: figure with different hatches"""
_determinism_check('h', format="pdf")
def test_determinism_markers():
"""Test for reproducible PDF output: figure with different markers"""
_determinism_check('m', format="pdf")
def test_determinism_all():
"""Test for reproducible PDF output"""
_determinism_check(format="pdf")
@image_comparison(baseline_images=['hatching_legend'],
extensions=['pdf'])
def test_hatching_legend():
"""Test for correct hatching on patches in legend"""
fig = plt.figure(figsize=(1, 2))
a = plt.Rectangle([0, 0], 0, 0, facecolor="green", hatch="XXXX")
b = plt.Rectangle([0, 0], 0, 0, facecolor="blue", hatch="XXXX")
fig.legend([a, b, a, b], ["", "", "", ""])
@image_comparison(baseline_images=['grayscale_alpha'],
extensions=['pdf'])
def test_grayscale_alpha():
"""Masking images with NaN did not work for grayscale images"""
x, y = np.ogrid[-2:2:.1, -2:2:.1]
dd = np.exp(-(x**2 + y**2))
dd[dd < .1] = np.nan
fig, ax = plt.subplots()
ax.imshow(dd, interpolation='none', cmap='gray_r')
ax.set_xticks([])
ax.set_yticks([])
# This tests tends to hit a TeX cache lock on AppVeyor.
@pytest.mark.flaky(reruns=3)
@needs_usetex
def test_missing_psfont(monkeypatch):
"""An error is raised if a TeX font lacks a Type-1 equivalent"""
def psfont(*args, **kwargs):
return dviread.PsFont(texname='texfont', psname='Some Font',
effects=None, encoding=None, filename=None)
monkeypatch.setattr(dviread.PsfontsMap, '__getitem__', psfont)
rcParams['text.usetex'] = True
fig, ax = plt.subplots()
ax.text(0.5, 0.5, 'hello')
with tempfile.TemporaryFile() as tmpfile, pytest.raises(ValueError):
fig.savefig(tmpfile, format='pdf')
@pytest.mark.style('default')
def test_pdf_savefig_when_color_is_none(tmpdir):
fig, ax = plt.subplots()
plt.axis('off')
ax.plot(np.sin(np.linspace(-5, 5, 100)), 'v', c='none')
actual_image = tmpdir.join('figure.pdf')
expected_image = tmpdir.join('figure.eps')
fig.savefig(str(actual_image), format='pdf')
fig.savefig(str(expected_image), format='eps')
result = compare_images(str(actual_image), str(expected_image), 0)
assert result is None