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Diffstat (limited to 'libs/cairo-1.16.0/test/fill-rule.c')
| -rw-r--r-- | libs/cairo-1.16.0/test/fill-rule.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/fill-rule.c b/libs/cairo-1.16.0/test/fill-rule.c new file mode 100644 index 0000000..66f19b7 --- /dev/null +++ b/libs/cairo-1.16.0/test/fill-rule.c @@ -0,0 +1,127 @@ +/* + * Copyright © 2004 Red Hat, Inc. + * + * Permission to use, copy, modify, distribute, and sell this software + * and its documentation for any purpose is hereby granted without + * fee, provided that the above copyright notice appear in all copies + * and that both that copyright notice and this permission notice + * appear in supporting documentation, and that the name of + * Red Hat, Inc. not be used in advertising or publicity pertaining to + * distribution of the software without specific, written prior + * permission. Red Hat, Inc. makes no representations about the + * suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS + * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL, + * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER + * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR + * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * Author: Carl D. Worth <cworth@cworth.org> + */ + +/* Bug history + * + * 2004-10-27 Carl Worth <cworth@cworth.org> + * + * There's currently a regression bug in the tessellation code. This + * causes each of these simple star shapes to be filled incorrectly. + * + * It looks like right now we can get this test to pass by doing: + * + * cvs update -r 1.16 src/cairo_traps.c + * + * But we don't want to revert that change permanently since it + * really does correct some bugs. It must be that the old version of + * the code is masking some other bugs in the tessellation code. My + * current plan is to back this revision up for the next snapshot, + * but not to list the test as an expected failure since I'm + * planning on doing the new tessellator which should fix this + * problem. + * + * 2005-01-11 Carl Worth <cworth@cworth.org> + * + * Keith committed some fixes that fix the original size-20 + * star_path: + * + * * src/cairo_wideint.c: (_cairo_int32x32_64_mul), + * (_cairo_int64x64_128_mul): + * * src/cairo_wideint.h: + * int32x32_64_mul and int64x64_128_mul are different from their + * unsigned compatriots + * + * 2005-01-12 Carl Worth <cworth@cworth.org> + * + * Going back to the SVG test suite, however, the original star + * shape is still broken. Adding both shapes now as little_star_path + * and big_star_path. + * + */ + +#include "cairo-test.h" + +#define LITTLE_STAR_SIZE 20 +#define BIG_STAR_SIZE 80 + +/* The SVG start trimmed down, but still showing the bug (originally) */ +static void +little_star_path (cairo_t *cr) +{ + cairo_move_to (cr, 10, 0); + cairo_rel_line_to (cr, 6, 20); + cairo_rel_line_to (cr, -16, -12); + cairo_rel_line_to (cr, 20, 0); + cairo_rel_line_to (cr, -16, 12); +} + +/* The star shape from the SVG test suite. This was is still buggy even after + we got little_star_path working. */ +static void +big_star_path (cairo_t *cr) +{ + cairo_move_to (cr, 40, 0); + cairo_rel_line_to (cr, 25, 80); + cairo_rel_line_to (cr, -65, -50); + cairo_rel_line_to (cr, 80, 0); + cairo_rel_line_to (cr, -65, 50); + cairo_close_path (cr); +} + +/* Fill the same path twice, once with each fill rule */ +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); + little_star_path (cr); + cairo_set_fill_rule (cr, CAIRO_FILL_RULE_WINDING); + cairo_fill (cr); + + cairo_translate (cr, LITTLE_STAR_SIZE + 1, 0); + little_star_path (cr); + cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD); + cairo_fill (cr); + + cairo_translate (cr, -(LITTLE_STAR_SIZE + 1), LITTLE_STAR_SIZE + 1); + big_star_path (cr); + cairo_set_fill_rule (cr, CAIRO_FILL_RULE_WINDING); + cairo_fill (cr); + + cairo_translate (cr, BIG_STAR_SIZE + 1, 0); + big_star_path (cr); + cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD); + cairo_fill (cr); + + return CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (fill_rule, + "Tests cairo_set_fill_rule with some star shapes", + "fill, path", /* keywords */ + NULL, /* requirements */ + BIG_STAR_SIZE * 2 + 3, BIG_STAR_SIZE + LITTLE_STAR_SIZE + 3, + NULL, draw) |