blob: 66f19b7cc902cd26feaa9b49d74efed64e459b99 [file] [log] [blame]
/*
* Copyright © 2004 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>
*/
/* Bug history
*
* 2004-10-27 Carl Worth <cworth@cworth.org>
*
* There's currently a regression bug in the tessellation code. This
* causes each of these simple star shapes to be filled incorrectly.
*
* It looks like right now we can get this test to pass by doing:
*
* cvs update -r 1.16 src/cairo_traps.c
*
* But we don't want to revert that change permanently since it
* really does correct some bugs. It must be that the old version of
* the code is masking some other bugs in the tessellation code. My
* current plan is to back this revision up for the next snapshot,
* but not to list the test as an expected failure since I'm
* planning on doing the new tessellator which should fix this
* problem.
*
* 2005-01-11 Carl Worth <cworth@cworth.org>
*
* Keith committed some fixes that fix the original size-20
* star_path:
*
* * src/cairo_wideint.c: (_cairo_int32x32_64_mul),
* (_cairo_int64x64_128_mul):
* * src/cairo_wideint.h:
* int32x32_64_mul and int64x64_128_mul are different from their
* unsigned compatriots
*
* 2005-01-12 Carl Worth <cworth@cworth.org>
*
* Going back to the SVG test suite, however, the original star
* shape is still broken. Adding both shapes now as little_star_path
* and big_star_path.
*
*/
#include "cairo-test.h"
#define LITTLE_STAR_SIZE 20
#define BIG_STAR_SIZE 80
/* The SVG start trimmed down, but still showing the bug (originally) */
static void
little_star_path (cairo_t *cr)
{
cairo_move_to (cr, 10, 0);
cairo_rel_line_to (cr, 6, 20);
cairo_rel_line_to (cr, -16, -12);
cairo_rel_line_to (cr, 20, 0);
cairo_rel_line_to (cr, -16, 12);
}
/* The star shape from the SVG test suite. This was is still buggy even after
we got little_star_path working. */
static void
big_star_path (cairo_t *cr)
{
cairo_move_to (cr, 40, 0);
cairo_rel_line_to (cr, 25, 80);
cairo_rel_line_to (cr, -65, -50);
cairo_rel_line_to (cr, 80, 0);
cairo_rel_line_to (cr, -65, 50);
cairo_close_path (cr);
}
/* Fill the same path twice, once with each fill rule */
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_translate (cr, 1, 1);
little_star_path (cr);
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_WINDING);
cairo_fill (cr);
cairo_translate (cr, LITTLE_STAR_SIZE + 1, 0);
little_star_path (cr);
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
cairo_fill (cr);
cairo_translate (cr, -(LITTLE_STAR_SIZE + 1), LITTLE_STAR_SIZE + 1);
big_star_path (cr);
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_WINDING);
cairo_fill (cr);
cairo_translate (cr, BIG_STAR_SIZE + 1, 0);
big_star_path (cr);
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
cairo_fill (cr);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (fill_rule,
"Tests cairo_set_fill_rule with some star shapes",
"fill, path", /* keywords */
NULL, /* requirements */
BIG_STAR_SIZE * 2 + 3, BIG_STAR_SIZE + LITTLE_STAR_SIZE + 3,
NULL, draw)