diff options
Diffstat (limited to 'libs/cairo-1.16.0/test/fill-degenerate-sort-order.c')
| -rw-r--r-- | libs/cairo-1.16.0/test/fill-degenerate-sort-order.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/fill-degenerate-sort-order.c b/libs/cairo-1.16.0/test/fill-degenerate-sort-order.c new file mode 100644 index 0000000..d934810 --- /dev/null +++ b/libs/cairo-1.16.0/test/fill-degenerate-sort-order.c @@ -0,0 +1,77 @@ +/* + * Copyright © 2006 M Joonas Pihlaja + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, + * modify, merge, publish, distribute, sublicense, and/or sell copies + * of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + * Author: M Joonas Pihlaja <jpihlaja@cc.helsinki.fi> + */ + +/* Bug history + * + * 2006-12-05 M Joonas Pihlaja <jpihlaja@cc.helsinki.fi> + * + * There's currently a regression bug in the tessellation code from + * switching to the "new tessellator". The bug is caused by + * confusion in the comparator used to order events when there are + * degenerate edges. + */ + +#include "cairo-test.h" + +/* Derived from zrusin's "another" polygon in the performance suite. */ +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + cairo_set_source_rgb (cr, 1, 0, 0); + + /* The polygon uses (43,103) as its "base point". Closed + * subpaths are simulated by going from the base point to the + * subpath's first point, doing the subpath, and returning to the + * base point. The moving to and from the base point causes + * degenerate edges which shouldn't result in anything visible. */ + cairo_move_to (cr, 43, 103); + + /* First subpath. */ + cairo_line_to (cr, 91, 101); + cairo_line_to (cr, 0, 112); + cairo_line_to (cr, 60, 0); + cairo_line_to (cr, 91, 101); + + cairo_line_to (cr, 43, 103); + + /* Second subpath. */ + cairo_line_to (cr, 176, 110); + cairo_line_to (cr, 116, 100); + cairo_line_to (cr, 176, 0); + cairo_line_to (cr, 176, 110); + + cairo_close_path (cr); + cairo_fill (cr); + + return CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (fill_degenerate_sort_order, + "Tests the tessellator's event comparator with degenerate input", + "degenerate, fill", /* keywords */ + NULL, /* requirements */ + 190, 120, + NULL, draw) |