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
|
/*
* Copyright © 2005 Red Hat, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of
* Red Hat, Inc. not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Red Hat, Inc. makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Author: Carl D. Worth <cworth@cworth.org>
*/
#include "cairo-test.h"
#define LINE_WIDTH 8.
#define SIZE (5 * LINE_WIDTH)
#define PAD (2 * LINE_WIDTH)
static cairo_test_draw_function_t draw;
static const cairo_test_t test = {
"dash-scale",
"Test interactions of cairo_set_dash and cairo_scale, (in particular with a non-uniformly scaled pen)",
3 * (PAD + SIZE) + PAD,
PAD + 5 * SIZE + 2 * (2 * PAD) + PAD,
draw
};
static void
make_path (cairo_t *cr)
{
cairo_move_to (cr, 0., 0.);
cairo_rel_line_to (cr, 0., SIZE);
cairo_rel_line_to (cr, SIZE, 0.);
cairo_close_path (cr);
cairo_move_to (cr, 2 * LINE_WIDTH, 0.);
cairo_rel_line_to (cr, 3 * LINE_WIDTH, 0.);
cairo_rel_line_to (cr, 0., 3 * LINE_WIDTH);
}
static void
draw_three_shapes (cairo_t *cr)
{
cairo_save (cr);
make_path (cr);
cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_BEVEL);
cairo_stroke (cr);
cairo_translate (cr, SIZE + PAD, 0.);
make_path (cr);
cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
cairo_stroke (cr);
cairo_translate (cr, SIZE + PAD, 0.);
make_path (cr);
cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_MITER);
cairo_stroke (cr);
cairo_restore (cr);
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
double dash[] = {1.5 * LINE_WIDTH};
/* We draw in the default black, so paint white first. */
cairo_save (cr);
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
cairo_paint (cr);
cairo_restore (cr);
cairo_translate (cr, PAD, PAD);
cairo_set_dash (cr, dash, sizeof(dash)/sizeof(dash[0]), - 2 * LINE_WIDTH);
cairo_set_line_width (cr, LINE_WIDTH);
draw_three_shapes (cr);
cairo_translate (cr, 0, SIZE + 2 * PAD);
cairo_save (cr);
{
cairo_set_dash (cr, dash, sizeof(dash)/sizeof(dash[0]), - 2 * LINE_WIDTH);
cairo_set_line_width (cr, LINE_WIDTH);
cairo_scale (cr, 1, 2);
draw_three_shapes (cr);
}
cairo_restore (cr);
cairo_translate (cr, 0, 2 * (SIZE + PAD));
cairo_save (cr);
{
cairo_scale (cr, 1, 2);
cairo_set_dash (cr, dash, sizeof(dash)/sizeof(dash[0]), - 2 * LINE_WIDTH);
cairo_set_line_width (cr, LINE_WIDTH);
draw_three_shapes (cr);
}
cairo_restore (cr);
return CAIRO_TEST_SUCCESS;
}
int
main (void)
{
return cairo_test (&test);
}
|
