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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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* Author: M Joonas Pihlaja <jpihlaja@cc.helsinki.fi>
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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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#include "cairo-test.h"
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static cairo_test_draw_function_t draw;
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"fill-degenerate-sort-order",
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"Tests the tessellator's event comparator with degenerate input",
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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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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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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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return CAIRO_TEST_SUCCESS;
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return cairo_test (&test);