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
|
/*
* 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"
#include "cairo-boilerplate-scaled-font.h"
#define TEXT_SIZE 12
/* Bug history
*
* 2006-06-22 Carl Worth <cworth@cworth.org>
*
* This is a test case to demonstrate the following bug in the xlib backend:
*
* Some characters aren't displayed when using xlib (cache usage missing freeze/thaw)
* https://bugs.freedesktop.org/show_bug.cgi?id=6955
*
* We replicate this bug by using the cairo_scaled_font_set_max_glyphs_per_font
* function to artifically induce cache pressure. (This function was added
* for this very purpose.)
*
* 2006-06-22 Carl Worth <cworth@cworth.org>
*
* Bug was simple enough to solve by just adding a freeze/thaw pair
* around the scaled_font's glyph cache in
* _cairo_xlib_surface_show_glyphs, (I went ahead and added
* _cairo_sacled_font_freeze/thaw_cache functions for this).
*/
static cairo_test_draw_function_t draw;
static const cairo_test_t test = {
"glyph-cache-pressure",
"Ensure that all backends behave well under artificial glyph cache pressure",
223, TEXT_SIZE + 4,
draw
};
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
/* 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_select_font_face (cr, "Bitstream Vera Sans",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size (cr, TEXT_SIZE);
cairo_set_source_rgb (cr, 0, 0, 0); /* black */
cairo_boilerplate_scaled_font_set_max_glyphs_cached (cairo_get_scaled_font (cr), 1);
cairo_move_to (cr, 1, TEXT_SIZE);
cairo_show_text (cr, "the five boxing wizards jump quickly");
return CAIRO_TEST_SUCCESS;
}
int
main (void)
{
return cairo_test (&test);
}
|
