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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
from __future__ import annotations
import re
from typing import TYPE_CHECKING, Any
import numpy as np
import pytest
from contourpy import FillType, LineType, contour_generator
from contourpy.util.data import random, simple
if TYPE_CHECKING:
from _pytest._py.path import LocalPath
@pytest.mark.image
@pytest.mark.text
@pytest.mark.parametrize("show_text", [False, True])
@pytest.mark.parametrize("fill_type", [*FillType.__members__.values(), "OuterCode"])
@pytest.mark.parametrize("multi", [False, True])
def test_debug_renderer_filled(show_text: bool, fill_type: FillType | str, multi: bool) -> None:
from contourpy.util.mpl_renderer import MplDebugRenderer
from .image_comparison import compare_images
renderer = MplDebugRenderer(figsize=(4.5, 3), show_frame=show_text)
x, y, z = simple((3, 4))
z[0, 2] = 0 # Ensure empty chunk
cont_gen = contour_generator(x, y, z, fill_type=fill_type, chunk_size=2)
levels = [0.25, 0.6]
if multi:
multi_filled = cont_gen.multi_filled(levels)
renderer.multi_filled(multi_filled, fill_type, color="C1")
else:
filled = cont_gen.filled(levels[0], levels[1])
renderer.filled(filled, fill_type, color="C1")
renderer.grid(x, y)
if show_text:
renderer.quad_numbers(x, y, z)
renderer.z_levels(x, y, z, lower_level=levels[0], upper_level=levels[1])
image_buffer = renderer.save_to_buffer()
suffix = "" if show_text else "_no_text"
compare_images(image_buffer, f"debug_renderer_filled{suffix}.png", f"{fill_type}_{multi}")
@pytest.mark.image
@pytest.mark.text
@pytest.mark.parametrize("show_text", [False, True])
@pytest.mark.parametrize("line_type", [*LineType.__members__.values(), "Separate"])
@pytest.mark.parametrize("multi", [False, True])
def test_debug_renderer_lines(show_text: bool, line_type: LineType, multi: bool) -> None:
from contourpy.util.mpl_renderer import MplDebugRenderer
from .image_comparison import compare_images
renderer = MplDebugRenderer(figsize=(4.5, 3), show_frame=show_text)
x, y, z = simple((3, 4))
cont_gen = contour_generator(x, y, z, line_type=line_type)
levels = [0.25, 0.6]
if multi:
multi_lines = cont_gen.multi_lines(levels)
renderer.multi_lines(multi_lines, line_type, linewidth=2)
else:
for i, level in enumerate(levels):
lines = cont_gen.lines(level)
renderer.lines(lines, line_type, color=f"C{i}", linewidth=2)
renderer.grid(x, y)
if show_text:
renderer.quad_numbers(x, y, z)
renderer.point_numbers(x, y, z)
image_buffer = renderer.save_to_buffer()
suffix = "" if show_text else "_no_text"
compare_images(image_buffer, f"debug_renderer_lines{suffix}.png", f"{line_type}_{multi}")
@pytest.mark.image
@pytest.mark.text
@pytest.mark.parametrize("show_text", [False, True])
@pytest.mark.parametrize("debug", [False, True])
@pytest.mark.parametrize("fill_type", [*FillType.__members__.values(), "OuterCode"])
@pytest.mark.parametrize("multi", [False, True])
def test_renderer_filled(show_text: bool, debug: bool, fill_type: FillType, multi: bool) -> None:
from contourpy.util.mpl_renderer import MplDebugRenderer, MplRenderer
from .image_comparison import compare_images
# Same results from MplDebugRenderer if extra kwargs supplied to renderer.Filled() call.
filled_kw: dict[str, Any] = {"line_color": None, "point_color": None} if debug else {}
filled_quad_as_tri_kw = filled_kw.copy() | {"alpha": 0.4}
if not debug:
renderer = MplRenderer(ncols=2, figsize=(8, 3), show_frame=False)
else:
renderer = MplDebugRenderer(ncols=2, figsize=(8, 3), show_frame=False)
x, y, z = random((3, 4), mask_fraction=0.35)
for ax, quad_as_tri in enumerate((False, True)):
cont_gen = contour_generator(x, y, z, fill_type=fill_type)
kwargs = filled_quad_as_tri_kw if quad_as_tri else filled_kw
levels = np.linspace(0.0, 1.0, 11)
if multi:
multi_filled = cont_gen.multi_filled(levels)
renderer.multi_filled(multi_filled, fill_type, ax=ax, **kwargs)
else:
for i in range(len(levels)-1):
filled = cont_gen.filled(levels[i], levels[i+1])
renderer.filled(filled, fill_type, ax=ax, color=f"C{i}", **kwargs)
if quad_as_tri:
renderer.grid(x, y, ax=ax, alpha=0.5, quad_as_tri_alpha=0.5)
renderer.mask(x, y, z, ax=ax, color="red")
if show_text:
renderer.title("Title", ax=ax)
else:
renderer.grid(x, y, ax=ax, alpha=0.8, point_color="black")
if show_text:
renderer.title("Colored title", ax=ax, color="red")
image_buffer = renderer.save_to_buffer()
suffix = "" if show_text else "_no_text"
debug_suffix = "_debug" if debug else ""
compare_images(
image_buffer, f"renderer_filled{suffix}.png", f"{fill_type}{debug_suffix}_{multi}",
)
@pytest.mark.image
@pytest.mark.text
@pytest.mark.parametrize("show_text", [False, True])
@pytest.mark.parametrize("debug", [False, True])
@pytest.mark.parametrize("line_type", [*LineType.__members__.values(), "Separate"])
@pytest.mark.parametrize("multi", [False, True])
def test_renderer_lines(show_text: bool, debug: bool, line_type: LineType, multi: bool) -> None:
from contourpy.util.mpl_renderer import MplDebugRenderer, MplRenderer
from .image_comparison import compare_images
# Same results from MplDebugRenderer if extra kwargs supplied to renderer.lines() call.
lines_kw: dict[str, Any] = {"arrow_size": 0, "point_color": None} if debug else {}
lines_quad_as_tri_kw = lines_kw.copy() | {"alpha": 0.5, "linewidth": 3}
if not debug:
renderer = MplRenderer(ncols=2, figsize=(8, 3), show_frame=show_text)
else:
renderer = MplDebugRenderer(ncols=2, figsize=(8, 3), show_frame=show_text)
x, y, z = random((3, 4), mask_fraction=0.35)
for ax, quad_as_tri in enumerate((False, True)):
cont_gen = contour_generator(x, y, z, line_type=line_type)
kwargs = lines_quad_as_tri_kw if quad_as_tri else lines_kw
levels = np.linspace(0.1, 0.9, 9)
if multi:
multi_lines = cont_gen.multi_lines(levels)
renderer.multi_lines(multi_lines, line_type, ax=ax, **kwargs)
else:
for i in range(len(levels)):
lines = cont_gen.lines(levels[i])
renderer.lines(lines, line_type, ax=ax, color=f"C{i}", **kwargs)
if quad_as_tri:
renderer.grid(x, y, ax=ax, alpha=0.2, quad_as_tri_alpha=0.2)
renderer.mask(x, y, z, ax=ax, color="red")
if show_text:
renderer.z_values(x, y, z, ax=ax, fmt=".2f", quad_as_tri=True)
renderer.title("Title", ax=ax)
else:
renderer.grid(x, y, ax=ax, point_color="black")
if show_text:
renderer.z_values(x, y, z, ax=ax, fmt=".2f", color="blue")
renderer.title("Colored title", ax=ax, color="red")
image_buffer = renderer.save_to_buffer()
suffix = "" if show_text else "_no_text"
debug_suffix = "_debug" if debug else ""
compare_images(
image_buffer, f"renderer_lines{suffix}.png", f"{line_type}{debug_suffix}_{multi}",
)
@pytest.mark.image
@pytest.mark.parametrize("transparent", [False, True])
def test_save_png(transparent: bool, tmpdir: LocalPath) -> None:
from PIL import Image
from contourpy.util.mpl_renderer import MplRenderer
renderer = MplRenderer(figsize=(4, 3))
filename = (tmpdir / "mpl.png").strpath
renderer.save(filename, transparent)
# Testing that a PNG file is produced of the correct size and format.
# Not testing the actual image produced except for the first pixel to confirm transparency.
with Image.open(filename) as image:
assert image.format == "PNG"
assert image.mode == "RGBA"
assert image.size == (400, 300)
rgba = image.getpixel((0, 0))
assert rgba[:3] == (255, 255, 255)
assert rgba[3] == 0 if transparent else 255
@pytest.mark.image
@pytest.mark.parametrize("transparent", [False, True])
def test_save_svg(transparent: bool, tmpdir: LocalPath) -> None:
from contourpy.util.mpl_renderer import MplRenderer
renderer = MplRenderer(figsize=(4, 3))
filename = (tmpdir / "mpl.svg").strpath
renderer.save(filename, transparent)
# Rather simplistic check of SVG file contents.
with open(filename) as f:
svg = f.read()
assert len(re.findall("<svg ", svg)) == 1
count0 = len(re.findall("fill: none", svg))
count1 = len(re.findall("fill: #ffffff", svg))
if transparent:
assert count0 == 6 and count1 == 0
else:
assert count0 == 4 and count1 == 2
|
