diff options
Diffstat (limited to 'libs/cairo-1.16.0/test/rectangle-rounding-error.c')
| -rw-r--r-- | libs/cairo-1.16.0/test/rectangle-rounding-error.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/rectangle-rounding-error.c b/libs/cairo-1.16.0/test/rectangle-rounding-error.c new file mode 100644 index 0000000..6ad99ae --- /dev/null +++ b/libs/cairo-1.16.0/test/rectangle-rounding-error.c @@ -0,0 +1,64 @@ +/* + * Copyright © 2005 Bertram Felgenhauer + * + * 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 + * the author not be used in advertising or publicity pertaining to + * distribution of the software without specific, written prior + * permission. The author makes no representations about the + * suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS + * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS, IN NO EVENT SHALL THE AUTHOR. 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: Bertram Felgenhauer <int-e@gmx.de> + */ + +#include "cairo-test.h" + +/* Test case for: + * + * https://bugs.freedesktop.org/show_bug.cgi?id=4137 + */ + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + cairo_set_source_rgb (cr, 1, 1, 1); + cairo_paint (cr); + + cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE); + cairo_set_source_rgb (cr, 0, 0, 0); + + cairo_translate(cr, -300, -300); + cairo_scale(cr, 677.0/26, 677.0/26); + cairo_translate(cr, 1, 1); + + /* this should draw a seamless 2x2 rectangle */ + cairo_rectangle(cr, 11, 11, 1, 1); + cairo_rectangle(cr, 11, 12, 1, 1); + cairo_rectangle(cr, 12, 11, 1, 1); + cairo_rectangle(cr, 12, 12, 1, 1); + + cairo_set_source_rgb(cr, 0, 0, 0); + cairo_fill(cr); + + return CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (rectangle_rounding_error, + "This demonstrates (or not) a rounding error that causes a gap between " + "two neighbouring rectangles.", + "trap", /* keywords */ + "target=raster", /* requirements */ + 76, 76, + NULL, draw) |