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[test] add big-trap test

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This test fills a single path (a trapezoid, even) that's larger than the
16.16 precision used in pixman and other code.  It leads to memory
scribbling and a crash.  Note that there is no crash if a clip is not set.
This commit is contained in:
Vladimir Vukicevic 2006-11-20 15:30:04 -08:00 • committed by Vladimir Vukicevic
parent a91c1e3ea6
commit 9cffc56228
2 changed files with 61 additions and 0 deletions
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1
test/Makefile.am
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@ -1,6 +1,7 @@
# Here are all the tests that are run unconditionally
TESTS = \
a8-mask \
big-trap \
caps-joins \
caps-joins-alpha \
caps-sub-paths \

60
test/big-trap.c Normal file
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@ -0,0 +1,60 @@
/*
* Copyright © 2006 Mozilla Corporation
*
* 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
* Mozilla Corporation not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Mozilla Corporation makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* MOZILLA CORPORATION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL MOZILLA CORPORATION 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: Vladimir Vukicevic <vladimir@pobox.com>
*/
#include "cairo-test.h"
static cairo_test_draw_function_t draw;
cairo_test_t test = {
"big-trap",
"Test oversize trapezoid with a clip region",
100, 100,
draw
};
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
/* Note that without the clip, this doesn't crash... */
cairo_new_path (cr);
cairo_rectangle (cr, 0, 0, width, height);
cairo_clip (cr);
cairo_new_path (cr);
cairo_line_to (cr, 8.0, 8.0);
cairo_line_to (cr, 312.0, 8.0);
cairo_line_to (cr, 310.0, 31378756.2666666666);
cairo_line_to (cr, 10.0, 31378756.2666666666);
cairo_line_to (cr, 8.0, 8.0);
cairo_fill (cr);
return CAIRO_TEST_SUCCESS;
}
int
main (void)
{
return cairo_test (&test);
}