/*

 * Copyright © 2005 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>

 */

#include "cairo-test.h"

#define SIZE 30

/* At one point, an optimization was proposed for cairo in which a

 * curve_to would be optimized as a line_to. The initial (buggy)

 * implementation verified that the slopes of several segments of the

 * spline's control polygon were identical, but left open the

 * possibility of an anti-parallel slope for one segment.

 *

 * For example, given a spline with collinear control points (A,B,C,D)

 * positioned as follows:

 *

 *	C--A--B--D

 *

 * The code verified identical slopes for AB, CD, and AD. The missing

 * check for the BC segment allowed it to be anti-parallel to the

 * others as above, and hence invalid to replace this spline with the

 * AD line segment.

 */

static cairo_test_status_t

{

    /* The CABD spline as described above. We ensure that the spline

     * folds over on itself outside the bounds of the image to avoid

     * the reference image having the curved portion of that fold,

     * (which would just be harder to match in all the backends than

     * we really want). */

		     10.5, 0.5);

		     11.5, 0.5,

		    -25.0, 0.5,

		     31.0, 0.5);

    /* A reflected version: DBAC */

		    19.5, 0.5);

		    18.5, 0.5,

		    55.0, 0.5,

		    -1.0, 0.5);

}

	    "Test optimization treating curve_to as line_to",

	    "path", /* keywords */

	    NULL, /* requirements */

	    30,

	    5,

	    NULL, draw)