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
|
""" Needed Tests
Joins
DONE 1. Each version same for all paths through aliased code.
DONE 2. Each version same for all paths through antialiased code.
Dashed Lines
*. Should be tested for all versions of aliasing and all versions
of join, cap.
Clipping
<Perhaps in different file>
1. Test that clip_to_rect is inclusive on lower end and exclusive
on upper end.
2. Test that clip_to_rect behaves intelligently under ctm transforms.
Note: There are numerous comments in code that refer to implementation
details (outline, outline_aa, scanline_aa, etc.) from the C++
code. These are largely to help keep track of what paths have
been tested.
"""
import unittest
from numpy import array, alltrue, ravel
from kiva.agg import GraphicsContextArray
import kiva
from test_utils import Utils
class JoinStrokePathTestCase(unittest.TestCase, Utils):
def helper(self, antialias, width, line_cap, line_join,
size=(10,10)):
gc = GraphicsContextArray(size, pix_format="rgb24")
# clear background to white values (255, 255, 255)
gc.clear((1.0, 1.0, 1.0))
# single horizontal line across bottom of buffer
gc.move_to(1, 3)
gc.line_to(7, 3)
gc.line_to(7, 9)
# Settings allow the faster outline path through C++ code
gc. set_stroke_color((0.0, 0.0, 0.0)) # black
gc.set_antialias(antialias)
gc.set_line_width(width)
gc.set_line_cap(line_cap)
gc.set_line_join(line_join)
gc.stroke_path()
return gc
def _test_alias_miter(self):
""" fix me: This is producing aliased output.
I am not sure what this array should look like
exactly, so we just force it to fail right now
and print out the results.
"""
antialias = False
width = 3
line_cap = kiva.CAP_BUTT
line_join = kiva.JOIN_MITER
gc = self.helper(antialias, width, line_cap, line_join)
actual = gc.bmp_array[:,:,0]
assert 0, "join=miter, width=3, antialias=False\n%s" % actual
#assert_arrays_equal(actual, desired)
def _test_alias_bevel(self):
""" fix me: This is producing a line width of 4 instead of 3.
I am not sure what this array should look like
exactly, so we just force it to fail right now
and print out the results.
"""
antialias = False
width = 3
line_cap = kiva.CAP_BUTT
line_join = kiva.JOIN_BEVEL
gc = self.helper(antialias, width, line_cap, line_join)
actual = gc.bmp_array[:,:,0]
assert 0, "join=bevel, width=3, antialias=False\n%s" % actual
#assert_arrays_equal(actual, desired)
def _test_alias_round(self):
""" fix me: This is producing a line width of 4 instead of 3.
Also, the corner doesn't look so round. I have
checked that the scanline_aa renderer is setting
the stroked_path.line_join() value to agg::round_join.
I am not sure what this array should look like
exactly, so we just force it to fail right now
and print out the results.
"""
antialias = False
width = 3
line_cap = kiva.CAP_BUTT
line_join = kiva.JOIN_ROUND
gc = self.helper(antialias, width, line_cap, line_join)
actual = gc.bmp_array[:,:,0]
assert 0, "join=round, width=3, antialias=False\n%s" % actual
#assert_arrays_equal(actual, desired)
def test_antialias_miter(self):
""" fix me: How to make this pass on OS X and agg...
"""
antialias = True
width = 3
line_cap = kiva.CAP_BUTT
line_join = kiva.JOIN_MITER
gc = self.helper(antialias, width, line_cap, line_join)
actual = gc.bmp_array[:,:,0]
desired = array([[255, 255, 255, 255, 255, 255, 255, 255, 255, 255],
[255, 255, 255, 255, 255, 127, 0, 0, 127, 255],
[255, 255, 255, 255, 255, 127, 0, 0, 127, 255],
[255, 255, 255, 255, 255, 127, 0, 0, 127, 255],
[255, 255, 255, 255, 255, 127, 0, 0, 127, 255],
[255, 127, 127, 127, 127, 0, 0, 0, 127, 255],
[255, 0, 0, 0, 0, 0, 0, 0, 127, 255],
[255, 0, 0, 0, 0, 0, 0, 0, 127, 255],
[255, 127, 127, 127, 127, 127, 127, 127, 191, 255],
[255, 255, 255, 255, 255, 255, 255, 255, 255, 255]])
self.assertRavelEqual(actual, desired)
def test_antialias_bevel(self):
antialias = True
width = 3
line_cap = kiva.CAP_BUTT
line_join = kiva.JOIN_BEVEL
gc = self.helper(antialias, width, line_cap, line_join)
actual = gc.bmp_array[:,:,0]
desired = array([[255, 255, 255, 255, 255, 255, 255, 255, 255, 255],
[255, 255, 255, 255, 255, 127, 0, 0, 127, 255],
[255, 255, 255, 255, 255, 127, 0, 0, 127, 255],
[255, 255, 255, 255, 255, 127, 0, 0, 127, 255],
[255, 255, 255, 255, 255, 127, 0, 0, 127, 255],
[255, 127, 127, 127, 127, 0, 0, 0, 127, 255],
[255, 0, 0, 0, 0, 0, 0, 0, 127, 255],
[255, 0, 0, 0, 0, 0, 0, 31, 223, 255],
[255, 127, 127, 127, 127, 127, 127, 223, 255, 255],
[255, 255, 255, 255, 255, 255, 255, 255, 255, 255]])
self.assertRavelEqual(actual, desired)
def test_antialias_round(self):
""" fix me: How to make this test work for multiple renderers?
"""
antialias = True
width = 3
line_cap = kiva.CAP_BUTT
line_join = kiva.JOIN_ROUND
gc = self.helper(antialias, width, line_cap, line_join)
actual = gc.bmp_array[:,:,0]
desired = array([[255, 255, 255, 255, 255, 255, 255, 255, 255, 255],
[255, 255, 255, 255, 255, 127, 0, 0, 127, 255],
[255, 255, 255, 255, 255, 127, 0, 0, 127, 255],
[255, 255, 255, 255, 255, 127, 0, 0, 127, 255],
[255, 255, 255, 255, 255, 127, 0, 0, 127, 255],
[255, 127, 127, 127, 127, 0, 0, 0, 127, 255],
[255, 0, 0, 0, 0, 0, 0, 0, 127, 255],
[255, 0, 0, 0, 0, 0, 0, 0, 180, 255],
[255, 127, 127, 127, 127, 127, 127, 179, 253, 255],
[255, 255, 255, 255, 255, 255, 255, 255, 255, 255]])
self.assertRavelEqual(actual, desired)
if __name__ == "__main__":
unittest.main()
|
