1 
/*
2 
 * Copyright 2008 Chris Wilson
3 
 *
4 
 * Permission to use, copy, modify, distribute, and sell this software
5 
 * and its documentation for any purpose is hereby granted without
6 
 * fee, provided that the above copyright notice appear in all copies
7 
 * and that both that copyright notice and this permission notice
8 
 * appear in supporting documentation, and that the name of
9 
 * Chris Wilson not be used in advertising or publicity pertaining to
10 
 * distribution of the software without specific, written prior
11 
 * permission. Chris Wilson makes no representations about the
12 
 * suitability of this software for any purpose.  It is provided "as
13 
 * is" without express or implied warranty.
14 
 *
15 
 * CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
16 
 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
17 
 * FITNESS, IN NO EVENT SHALL CHRIS WILSON BE LIABLE FOR ANY SPECIAL,
18 
 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
19 
 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
20 
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
21 
 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 
 *
23 
 * Author: Chris Wilson <chris@chris-wilson.co.uk>
24 
 */
25 

            

        

            

                26
            

            

                
            

            

                
#include "cairo-test.h"

            

        

            

                27
            

            

                
            

            

                

            

        

            

                28
            

            

                
            

            

                
static cairo_test_status_t

            

        

            

                29
            

            

                3
            

            

                
draw (cairo_t *cr, int width, int height)

            

        

            

                30
            

            

                
            

            

                
{

            

        

            

                31
            

            

                3
            

            

                
    const char *text =

            

        

            

                32
            

            

                
            

            

                
"This needs to be a very long string, wider than the surface, and yet wider."

            

        

            

                33
            

            

                
            

            

                
"Ideally it should overflow the stack buffers, but do you really want to read "

            

        

            

                34
            

            

                
            

            

                
"a message that long. No. So we compromise with around 300 glyphs that is "

            

        

            

                35
            

            

                
            

            

                
"long enough to trigger the conditions as stated in "

            

        

            

                36
            

            

                
            

            

                
"https://lists.cairographics.org/archives/cairo/2008-December/015976.html. "

            

        

            

                37
            

            

                
            

            

                
"Happy now?";

            

        

            

                38
            

            

                
            

            

                
    cairo_text_extents_t extents;

            

        

            

                39
            

            

                
            

            

                

            

        

            

                40
            

            

                3
            

            

                
    cairo_set_source_rgb (cr, 1, 1, 1);

            

        

            

                41
            

            

                3
            

            

                
    cairo_paint (cr);

            

        

            

                42
            

            

                3
            

            

                
    cairo_set_source_rgb (cr, 0, 0, 0);

            

        

            

                43
            

            

                
            

            

                

            

        

            

                44
            

            

                3
            

            

                
    cairo_set_font_size (cr, 16);

            

        

            

                45
            

            

                3
            

            

                
    cairo_text_extents (cr, text, &extents);

            

        

            

                46
            

            

                3
            

            

                
    cairo_move_to (cr, -extents.width/2, 18);

            

        

            

                47
            

            

                3
            

            

                
    cairo_show_text (cr, text);

            

        

            

                48
            

            

                
            

            

                

            

        

            

                49
            

            

                
            

            

                
    /* XXX we should exercise cairo_show_text_glyphs() as well,

            

        

            

                50
            

            

                
            

            

                
     * and CAIRO_TEXT_CLUSTER_BACKWARDS

            

        

            

                51
            

            

                
            

            

                
     */

            

        

            

                52
            

            

                
            

            

                

            

        

            

                53
            

            

                3
            

            

                
    return CAIRO_TEST_SUCCESS;

            

        

            

                54
            

            

                
            

            

                
}

            

        

            

                55
            

            

                
            

            

                

            

        

            

                56
            

            

                1
            

            

                
CAIRO_TEST (culled_glyphs,

            

        

            

                57
            

            

                
            

            

                
	    "Tests culling of glyphs and text clusters",

            

        

            

                58
            

            

                
            

            

                
	    "glyphs", /* keywords */

            

        

            

                59
            

            

                
            

            

                
	    NULL, /* requirements */

            

        

            

                60
            

            

                
            

            

                
	    20, 20,

            

        

            

                61
            

            

                
            

            

                
	    NULL, draw)

            

        

            

                62