| /* |
| * 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> |
| * |
| * The tessellator has a regression where a trapezoid may continue |
| * below the end of a polygon edge (i.e. the bottom of the trapezoid |
| * is miscomputed.) This can only happen if the right edge of a |
| * trapezoid stops earlier than the left edge and there is no start |
| * event at the end point of the right edge. |
| */ |
| |
| #include "cairo-test.h" |
| |
| #define SIZE 50 |
| |
| static cairo_test_status_t |
| draw (cairo_t *cr, int width, int height) |
| { |
| cairo_set_source_rgb (cr, 1, 0, 0); |
| |
| cairo_translate (cr, 1, 1); |
| |
| /* What it should look like, with # marking the filled areas: |
| * |
| * |\ |\ |
| * |#\ |#\ |
| * |##\__|##\ |
| * \#| |
| * \| |
| * |
| * What it looke like with the bug, when the rightmost edge's end |
| * is missed: |
| * |
| * |\ |\ |
| * |#\ |#\ |
| * |##\__|##\ |
| * \#####| |
| * \####| |
| */ |
| |
| cairo_move_to (cr, 0, 0); |
| cairo_line_to (cr, SIZE/2, SIZE); |
| cairo_line_to (cr, SIZE/2, 0); |
| cairo_line_to (cr, SIZE, SIZE/2); |
| cairo_line_to (cr, 0, SIZE/2); |
| cairo_close_path (cr); |
| cairo_fill (cr); |
| |
| return CAIRO_TEST_SUCCESS; |
| } |
| |
| CAIRO_TEST (fill_missed_stop, |
| "Tests that the tessellator doesn't miss stop events when generating trapezoids", |
| "fill", /* keywords */ |
| NULL, /* requirements */ |
| SIZE+3, SIZE+3, |
| NULL, draw) |