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test: Add clip-push-group to demonstrate crash in cairo_push_group

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The crash happens anytime mask-based clipping is in effect
at the time of cairo_push_group. The crash was first reported
here:
	http://lists.freedesktop.org/archives/cairo/2006-August/007698.html
This commit is contained in:
Carl Worth 2006-10-19 15:43:02 -07:00
parent 8d2f036752
commit f880f5e57b
3 changed files with 76 additions and 0 deletions
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2
test/Makefile.am
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@ -12,6 +12,7 @@ clip-fill-rule \
clip-fill-rule-pixel-aligned \
clip-nesting \
clip-operator \
clip-push-group \
clip-twice \
close-path \
composite-integer-translate-source \
@ -180,6 +181,7 @@ clip-nesting-rgb24-ref.png \
clip-nesting-ps-argb32-ref.png \
clip-operator-ref.png \
clip-operator-rgb24-ref.png \
clip-push-group-ref \
clip-twice-ref.png \
clip-twice-rgb24-ref.png \
clip-twice-ps-argb32-ref.png \

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test/clip-push-group-ref.png Normal file
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74
test/clip-push-group.c Normal file
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@ -0,0 +1,74 @@
/*
* 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: Carl D. Worth <cworth@cworth.org>
*/
/* A test for the crash described here:
*
* http://lists.freedesktop.org/archives/cairo/2006-August/007698.html
*
* The triggering condition for this bug should be setting a
* surface-based clip and then calling cairo_push_group.
*/
#include "cairo-test.h"
#define SIZE 10
static cairo_test_draw_function_t draw;
cairo_test_t test = {
"clip-push-group",
"Test that push_group doesn't crash after setting a surface-based clip",
SIZE, SIZE,
draw
};
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
/* An overly complex way of drawing a blue circle onto a red
* background, to trigger the bug. */
cairo_set_source_rgb (cr, 1, 0, 0); /* red */
cairo_paint (cr);
cairo_arc (cr,
SIZE / 2, SIZE / 2,
SIZE / 2,
0, 2 * M_PI);
cairo_clip (cr);
cairo_push_group (cr);
cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
cairo_paint (cr);
cairo_pop_group_to_source (cr);
cairo_paint (cr);
return CAIRO_TEST_SUCCESS;
}
int
main (void)
{
return cairo_test (&test);
}