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Add test case from bug #8379 demonstrating infinite loop during round join

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(cherry picked from 8744929030 commit)
This commit is contained in:
Carl Worth 2006-09-21 15:13:47 -07:00
parent 459223945e
commit 16a08ff1b0
2 changed files with 74 additions and 0 deletions
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1
test/Makefile.am
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@ -38,6 +38,7 @@ glyph-cache-pressure \
get-and-set \
get-group-target \
gradient-alpha \
infinite-join \
leaky-dash \
leaky-polygon \
line-width \

73
test/infinite-join.c Normal file
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@ -0,0 +1,73 @@
/*
* 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 the
* copyright holders not be used in advertising or publicity
* pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied
* warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS 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>
*/
/* Test case for bug #8379:
*
* infinite loop when stroking
* https://bugs.freedesktop.org/show_bug.cgi?id=8379
*/
#include "cairo-test.h"
static cairo_test_draw_function_t draw;
cairo_test_t test = {
"infinite-join",
"Test case for infinite loop when stroking with round joins",
120, 70,
draw
};
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
/* scaling 2 times causes a slight rounding error in the ctm.
* Without that, the bug doesn't happen. */
cairo_scale (cr, 20 / 100., 20 / 100.);
cairo_scale (cr, 1. / 20, 1. / 20);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
cairo_set_line_width (cr, 20);
cairo_new_path (cr);
cairo_move_to (cr, 18928, 13843);
cairo_line_to (cr, -6928, 13843);
cairo_line_to (cr, -6928, -6842);
cairo_line_to (cr, 18928, -6842);
cairo_line_to (cr, 18928, 13843);
cairo_stroke (cr);
return 0;
}
int
main (void)
{
return cairo_test (&test);
}