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
|
/*
* Copyright © 2008 Chris Wilson
*
* 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
* Chris Wilson not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Chris Wilson makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL CHRIS WILSON 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: Chris Wilson <chris@chris-wilson.co.uk>
*/
#include "cairo-test.h"
static cairo_test_draw_function_t draw;
static const cairo_test_t test = {
"smask-text",
"Test the support of \"soft\" masks with text",
120, 60,
draw
};
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_surface_t *mask;
cairo_pattern_t *pattern;
cairo_t *cr2;
cairo_text_extents_t extents;
cairo_set_source_rgb (cr, 0, 0, 1.0);
cairo_paint (cr);
mask = cairo_surface_create_similar (cairo_get_group_target (cr),
CAIRO_CONTENT_ALPHA,
width, height);
cr2 = cairo_create (mask);
cairo_surface_destroy (mask);
cairo_save (cr2); {
cairo_set_operator (cr2, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr2);
} cairo_restore (cr2);
pattern = cairo_pattern_create_linear (0, 0, width, height);
cairo_pattern_add_color_stop_rgba (pattern, 0.00, 0., 0., 0., 0.);
cairo_pattern_add_color_stop_rgba (pattern, 0.25, 1., 1., 1., 1.);
cairo_pattern_add_color_stop_rgba (pattern, 0.50, 1., 1., 1., .5);
cairo_pattern_add_color_stop_rgba (pattern, 0.75, 1., 1., 1., 1.);
cairo_pattern_add_color_stop_rgba (pattern, 1.00, 0., 0., 0., 0.);
cairo_set_source (cr2, pattern);
cairo_pattern_destroy (pattern);
cairo_select_font_face (cr2,
"Bitstream Vera Sans",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size (cr2, 0.5 * height);
cairo_text_extents (cr2, "cairo", &extents);
cairo_move_to (cr2,
floor ((width - extents.width) / 2 + 0.5) - extents.x_bearing,
floor ((height - extents.height) / 2 - 0.5) - extents.y_bearing);
cairo_show_text (cr2, "cairo");
cairo_set_source_rgb (cr, 1.0, 0, 0);
cairo_mask_surface (cr, cairo_get_target (cr2), 0, 0);
cairo_destroy (cr2);
return CAIRO_TEST_SUCCESS;
}
int
main (void)
{
return cairo_test (&test);
}
|
