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
|
/*
* 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: Kristian Høgsberg <krh@redhat.com>
*/
#include "cairo-test.h"
#include <stdio.h>
#include <cairo-svg.h>
/* Test SVG clipping */
#define WIDTH_IN_POINTS 600
#define HEIGHT_IN_POINTS 600
#define BASENAME "svg-clip.out"
static void
test_clip (cairo_t *cr, double width, double height)
{
cairo_t *cr2;
/* Basic test; set a square clip and draw a circle to be clipped
* against it.*/
cairo_rectangle (cr, 100, 100, 400, 400);
cairo_clip (cr);
cairo_arc (cr, 300, 300, 210, 0, 2 * M_PI);
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_fill (cr);
/* Add a plus shaped clip path to the square clip and draw a big
* green square to test the new clip path. */
cairo_save (cr);
cairo_rectangle (cr, 250, 100, 100, 400);
cairo_rectangle (cr, 100, 250, 400, 100);
cairo_clip (cr);
cairo_rectangle (cr, 0, 0, 600, 600);
cairo_set_source_rgb (cr, 0, 1, 0);
cairo_fill (cr);
cairo_restore (cr);
/* Set a bezier shape in addition to the rectangle clip set before
* the cairo_save() to verify that we successfully removed the
* plus shaped clip path and can set a new clip.*/
cairo_move_to (cr, 600, 0);
cairo_curve_to (cr, 300, 600, 0, 300, 600, 0);
cairo_clip (cr);
cairo_rectangle (cr, 0, 0, 600, 600);
cairo_set_source_rgb (cr, 0, 0, 1);
cairo_fill (cr);
/* Create a new context for this surface to test overlapped
* drawing from two contexts */
cr2 = cairo_create (cairo_get_group_target (cr));
/* Using the new context, draw a black vertical line, which should
* appear unclipped on top of everything drawn so far. */
cairo_move_to (cr2, 110, 0);
cairo_line_to (cr2, 110, 600);
cairo_stroke (cr2);
/* Using the first context, draw another black vertical line.
* This line should be clipped agaist the bezier clipping path set
* earlier. */
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_move_to (cr, 400, 0);
cairo_line_to (cr, 400, 600);
cairo_stroke (cr);
cairo_destroy (cr2);
/* Test reset clip. Draw a transparent black circle over
* everything. Specifically, make sure the circle extends outside
* the square clip set at the top of this function. */
cairo_reset_clip (cr);
cairo_arc (cr, 300, 300, 220, 0, 2 * M_PI);
cairo_set_source_rgba (cr, 0, 0, 0, 0.2);
cairo_fill (cr);
}
static cairo_test_status_t
preamble (cairo_test_context_t *ctx)
{
cairo_t *cr;
cairo_surface_t *surface;
char *filename;
const char *path = cairo_test_mkdir (CAIRO_TEST_OUTPUT_DIR) ? CAIRO_TEST_OUTPUT_DIR : ".";
if (! cairo_test_is_target_enabled (ctx, "svg11") &&
! cairo_test_is_target_enabled (ctx, "svg12"))
{
return CAIRO_TEST_UNTESTED;
}
xasprintf (&filename, "%s/%s.svg", path, BASENAME);
surface = cairo_svg_surface_create (filename,
WIDTH_IN_POINTS, HEIGHT_IN_POINTS);
if (cairo_surface_status (surface)) {
cairo_test_log (ctx,
"Failed to create svg surface for file %s: %s\n",
filename, cairo_status_to_string (cairo_surface_status (surface)));
free (filename);
return CAIRO_TEST_FAILURE;
}
cr = cairo_create (surface);
test_clip (cr, WIDTH_IN_POINTS, HEIGHT_IN_POINTS);
cairo_show_page (cr);
cairo_destroy (cr);
cairo_surface_destroy (surface);
printf ("svg-clip: Please check %s to make sure it looks happy.\n",
filename);
free (filename);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (svg_clip,
"Test SVG clipping",
"svg, clip", /* keywords */
NULL, /* requirements */
0, 0,
preamble, NULL)
|
