Grcov report - fill-degenerate-sort-order.c

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/*

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 * Copyright © 2006 M Joonas Pihlaja

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 * Permission is hereby granted, free of charge, to any person

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 * obtaining a copy of this software and associated documentation

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 * files (the "Software"), to deal in the Software without

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 * restriction, including without limitation the rights to use, copy,

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 * modify, merge, publish, distribute, sublicense, and/or sell copies

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 * of the Software, and to permit persons to whom the Software is

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 * furnished to do so, subject to the following conditions:

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 * The above copyright notice and this permission notice shall be

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 * included in all copies or substantial portions of the Software.

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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

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 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

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 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

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 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

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 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

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 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

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 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

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 * SOFTWARE.

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 * Author: M Joonas Pihlaja <jpihlaja@cc.helsinki.fi>

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*/

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/* Bug history

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 * 2006-12-05  M Joonas Pihlaja <jpihlaja@cc.helsinki.fi>

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 *   There's currently a regression bug in the tessellation code from

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 *   switching to the "new tessellator".  The bug is caused by

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 *   confusion in the comparator used to order events when there are

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 *   degenerate edges.

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*/

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#include "cairo-test.h"

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/* Derived from zrusin's "another" polygon in the performance suite. */

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static cairo_test_status_t

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draw (cairo_t *cr, int width, int height)

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    cairo_set_source_rgb (cr, 1, 0, 0);

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    /* The polygon uses (43,103) as its "base point".  Closed

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     * subpaths are simulated by going from the base point to the

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     * subpath's first point, doing the subpath, and returning to the

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     * base point.  The moving to and from the base point causes

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     * degenerate edges which shouldn't result in anything visible. */

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    cairo_move_to (cr, 43, 103);

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    /* First subpath. */

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    cairo_line_to (cr, 91, 101);

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    cairo_line_to (cr, 0, 112);

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    cairo_line_to (cr, 60, 0);

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    cairo_line_to (cr, 91, 101);

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    cairo_line_to (cr, 43, 103);

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    /* Second subpath. */

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    cairo_line_to (cr, 176, 110);

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    cairo_line_to (cr, 116, 100);

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    cairo_line_to (cr, 176, 0);

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    cairo_line_to (cr, 176, 110);

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    cairo_close_path (cr);

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    cairo_fill (cr);

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    return CAIRO_TEST_SUCCESS;

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CAIRO_TEST (fill_degenerate_sort_order,

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	    "Tests the tessellator's event comparator with degenerate input",

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	    "degenerate, fill", /* keywords */

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	    NULL, /* requirements */

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	    190, 120,

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	    NULL, draw)