Repository navigation
Expand file tree
/
Copy pathtest_backend_pgf.py
More file actions
198 lines (162 loc) · 6.01 KB
/
Copy pathtest_backend_pgf.py
File metadata and controls
198 lines (162 loc) · 6.01 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
# -*- encoding: utf-8 -*-
from __future__ import (absolute_import, division, print_function,
unicode_literals)
import os
import shutil
import numpy as np
import pytest
import matplotlib as mpl
import matplotlib.pyplot as plt
from matplotlib.compat import subprocess
from matplotlib.testing.compare import compare_images, ImageComparisonFailure
from matplotlib.testing.decorators import _image_directories
baseline_dir, result_dir = _image_directories(lambda: 'dummy func')
def check_for(texsystem):
header = """
\\documentclass{minimal}
\\usepackage{pgf}
\\begin{document}
\\typeout{pgfversion=\\pgfversion}
\\makeatletter
\\@@end
"""
try:
latex = subprocess.Popen([str(texsystem), "-halt-on-error"],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE)
stdout, stderr = latex.communicate(header.encode("utf8"))
except OSError:
return False
return latex.returncode == 0
needs_xelatex = pytest.mark.skipif(not check_for('xelatex'),
reason='xelatex + pgf is required')
needs_pdflatex = pytest.mark.skipif(not check_for('pdflatex'),
reason='pdflatex + pgf is required')
def compare_figure(fname, savefig_kwargs={}, tol=0):
actual = os.path.join(result_dir, fname)
plt.savefig(actual, **savefig_kwargs)
expected = os.path.join(result_dir, "expected_%s" % fname)
shutil.copyfile(os.path.join(baseline_dir, fname), expected)
err = compare_images(expected, actual, tol=tol)
if err:
raise ImageComparisonFailure(err)
def create_figure():
plt.figure()
x = np.linspace(0, 1, 15)
# line plot
plt.plot(x, x ** 2, "b-")
# marker
plt.plot(x, 1 - x**2, "g>")
# filled paths and patterns
plt.fill_between([0., .4], [.4, 0.], hatch='//', facecolor="lightgray",
edgecolor="red")
plt.fill([3, 3, .8, .8, 3], [2, -2, -2, 0, 2], "b")
# text and typesetting
plt.plot([0.9], [0.5], "ro", markersize=3)
plt.text(0.9, 0.5, 'unicode (ü, °, µ) and math ($\\mu_i = x_i^2$)',
ha='right', fontsize=20)
plt.ylabel('sans-serif, blue, $\\frac{\\sqrt{x}}{y^2}$..',
family='sans-serif', color='blue')
plt.xlim(0, 1)
plt.ylim(0, 1)
# test compiling a figure to pdf with xelatex
@needs_xelatex
@pytest.mark.style('default')
@pytest.mark.backend('pgf')
def test_xelatex():
rc_xelatex = {'font.family': 'serif',
'pgf.rcfonts': False}
mpl.rcParams.update(rc_xelatex)
create_figure()
compare_figure('pgf_xelatex.pdf', tol=0)
# test compiling a figure to pdf with pdflatex
@needs_pdflatex
@pytest.mark.style('default')
@pytest.mark.backend('pgf')
def test_pdflatex():
import os
if os.environ.get('APPVEYOR', False):
pytest.xfail("pdflatex test does not work on appveyor due to missing "
"LaTeX fonts")
rc_pdflatex = {'font.family': 'serif',
'pgf.rcfonts': False,
'pgf.texsystem': 'pdflatex',
'pgf.preamble': ['\\usepackage[utf8x]{inputenc}',
'\\usepackage[T1]{fontenc}']}
mpl.rcParams.update(rc_pdflatex)
create_figure()
compare_figure('pgf_pdflatex.pdf', tol=0)
# test updating the rc parameters for each figure
@needs_xelatex
@needs_pdflatex
@pytest.mark.style('default')
@pytest.mark.backend('pgf')
def test_rcupdate():
rc_sets = []
rc_sets.append({'font.family': 'sans-serif',
'font.size': 30,
'figure.subplot.left': .2,
'lines.markersize': 10,
'pgf.rcfonts': False,
'pgf.texsystem': 'xelatex'})
rc_sets.append({'font.family': 'monospace',
'font.size': 10,
'figure.subplot.left': .1,
'lines.markersize': 20,
'pgf.rcfonts': False,
'pgf.texsystem': 'pdflatex',
'pgf.preamble': ['\\usepackage[utf8x]{inputenc}',
'\\usepackage[T1]{fontenc}',
'\\usepackage{sfmath}']})
tol = (6, 0)
original_params = mpl.rcParams.copy()
for i, rc_set in enumerate(rc_sets):
mpl.rcParams.clear()
mpl.rcParams.update(original_params)
mpl.rcParams.update(rc_set)
create_figure()
compare_figure('pgf_rcupdate%d.pdf' % (i + 1), tol=tol[i])
# test backend-side clipping, since large numbers are not supported by TeX
@needs_xelatex
@pytest.mark.style('default')
@pytest.mark.backend('pgf')
def test_pathclip():
rc_xelatex = {'font.family': 'serif',
'pgf.rcfonts': False}
mpl.rcParams.update(rc_xelatex)
plt.figure()
plt.plot([0., 1e100], [0., 1e100])
plt.xlim(0, 1)
plt.ylim(0, 1)
# this test passes if compiling/saving to pdf works (no image comparison)
plt.savefig(os.path.join(result_dir, "pgf_pathclip.pdf"))
# test mixed mode rendering
@needs_xelatex
@pytest.mark.style('default')
@pytest.mark.backend('pgf')
def test_mixedmode():
rc_xelatex = {'font.family': 'serif',
'pgf.rcfonts': False}
mpl.rcParams.update(rc_xelatex)
Y, X = np.ogrid[-1:1:40j, -1:1:40j]
plt.figure()
plt.pcolor(X**2 + Y**2).set_rasterized(True)
compare_figure('pgf_mixedmode.pdf', tol=0)
# test bbox_inches clipping
@needs_xelatex
@pytest.mark.style('default')
@pytest.mark.backend('pgf')
def test_bbox_inches():
rc_xelatex = {'font.family': 'serif',
'pgf.rcfonts': False}
mpl.rcParams.update(rc_xelatex)
Y, X = np.ogrid[-1:1:40j, -1:1:40j]
fig = plt.figure()
ax1 = fig.add_subplot(121)
ax1.plot(range(5))
ax2 = fig.add_subplot(122)
ax2.plot(range(5))
plt.tight_layout()
bbox = ax1.get_window_extent().transformed(fig.dpi_scale_trans.inverted())
compare_figure('pgf_bbox_inches.pdf', savefig_kwargs={'bbox_inches': bbox},
tol=0)