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565a715d11
The blurb for the fill-degenerate-sort-order, fill-missed-stop and in-fill-empty-trapezoid tests changed to this one: http://www.opensource.org/licenses/mit-license.php c.f. http://lists.freedesktop.org/archives/cairo/2006-December/008806.html
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/*
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* Copyright © 2006 M Joonas Pihlaja
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*
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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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*
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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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*
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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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*
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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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*
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* 2006-12-05 M Joonas Pihlaja <jpihlaja@cc.helsinki.fi>
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*
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* The tessellator has a regression where a trapezoid may continue
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* below the end of a polygon edge (i.e. the bottom of the trapezoid
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* is miscomputed.) This can only happen if the right edge of a
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* trapezoid stops earlier than the left edge and there is no start
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* event at the end point of the right edge.
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*/
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#include "cairo-test.h"
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static cairo_test_draw_function_t draw;
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#define SIZE 50
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cairo_test_t test = {
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"fill-missed-stop",
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"Tests that the tessellator doesn't miss stop events when generating trapezoids",
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SIZE+3, SIZE+3,
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draw
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};
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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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{
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cairo_set_source_rgb (cr, 1, 0, 0);
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cairo_translate (cr, 1, 1);
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/* What it should look like, with # marking the filled areas:
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*
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* |\ |\
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* |#\ |#\
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* |##\__|##\
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* \#|
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* \|
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*
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* What it looke like with the bug, when the rightmost edge's end
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* is missed:
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*
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* |\ |\
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* |#\ |#\
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* |##\__|##\
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* \#####|
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* \####|
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*/
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cairo_move_to (cr, 0, 0);
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cairo_line_to (cr, SIZE/2, SIZE);
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cairo_line_to (cr, SIZE/2, 0);
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cairo_line_to (cr, SIZE, SIZE/2);
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cairo_line_to (cr, 0, SIZE/2);
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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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}
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int
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main (void)
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{
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return cairo_test (&test);
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}
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