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/*
* Copyright © 2006 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: Behdad Esfahbod <behdad@behdad.org>
*/
/* Related bug 5177
*
* In short:
*
* _cairo_atsui_font_text_to_glyph with a zero-sized string crashes.
*
* Moreover, the fallback path in cairo_scaled_font_text_to_glyphs()
* when handling a zero-sized string, allocates a zero-sized glyph array
* and when NULL is returned by malloc, recognizes that as an out-of-memory
* error. The glibc implementation of malloc() does not return NULL from
* malloc(0), but I don't think it's a safe assumption.
*
* By just bailing out on zero-sized text, we fix both issues.
*/
#include "cairo-test.h"
#define WIDTH 60
#define HEIGHT 60
#define NUM_TEXT 20
#define TEXT_SIZE 12
static cairo_test_draw_function_t draw;
cairo_test_t test = {
"text-zero-len",
"Tests show_text and text_path with a zero-sized string",
WIDTH, HEIGHT,
draw
};
/* Draw the word cairo at NUM_TEXT different angles */
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_text_extents_t extents;
cairo_select_font_face (cr, "Bitstream Vera Sans",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size (cr, 16);
cairo_move_to (cr, 10, 25);
cairo_show_text (cr, "");
cairo_show_glyphs (cr, NULL, 0);
cairo_show_glyphs (cr, (void*)8, 0);
cairo_move_to (cr, 10, 55);
cairo_text_path (cr, "");
cairo_glyph_path (cr, (void*)8, 0);
cairo_fill (cr);
cairo_text_extents (cr, "", &extents);
cairo_glyph_extents (cr, (void*)8, 0, &extents);
return CAIRO_TEST_SUCCESS;
}
int
main (void)
{
return cairo_test (&test);
}
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