diff options
author | Chris Wilson <chris@chris-wilson.co.uk> | 2008-04-29 15:19:40 +0100 |
---|---|---|
committer | Carl Worth <cworth@cworth.org> | 2008-06-19 17:28:25 -0700 |
commit | 90e0b7685fc329429cbf37c80442067468ef4492 (patch) | |
tree | bae2b8d9736cd7e5fec0ff451c2e2aebea92fa9b | |
parent | 05a8e303116a6a8d99ad14d7e12418f0b832a19e (diff) | |
download | cairo-90e0b7685fc329429cbf37c80442067468ef4492.tar.gz |
[test] Add test case for a leaky dashed rectangle.
Franz Schmid reported on the mailing list,
http://lists.cairographics.org/archives/cairo/2008-April/013912.html,
an issue with drawing a dashed rubber band in Scribus. The problem
appears when segments of the dashed rectangle are outside the image,
with the errant dash connecting the ends of the visible segments.
-rw-r--r-- | test/.gitignore | 1 | ||||
-rw-r--r-- | test/Makefile.am | 2 | ||||
-rw-r--r-- | test/leaky-dashed-rectangle-ref.png | bin | 0 -> 444 bytes | |||
-rw-r--r-- | test/leaky-dashed-rectangle.c | 92 |
4 files changed, 95 insertions, 0 deletions
diff --git a/test/.gitignore b/test/.gitignore index 9d2587ba6..b339d2cd2 100644 --- a/test/.gitignore +++ b/test/.gitignore @@ -92,6 +92,7 @@ in-fill-trapezoid invalid-matrix large-source leaky-dash +leaky-dashed-rectangle leaky-polygon line-width line-width-scale diff --git a/test/Makefile.am b/test/Makefile.am index faf82f0dd..4e0340fe5 100644 --- a/test/Makefile.am +++ b/test/Makefile.am @@ -71,6 +71,7 @@ in-fill-trapezoid$(EXEEXT) \ invalid-matrix$(EXEEXT) \ large-source$(EXEEXT) \ leaky-dash$(EXEEXT) \ +leaky-dashed-rectangle$(EXEEXT) \ leaky-polygon$(EXEEXT) \ line-width$(EXEEXT) \ line-width-scale$(EXEEXT) \ @@ -433,6 +434,7 @@ REFERENCE_IMAGES = \ leaky-dash-ps-rgb24-ref.png \ leaky-dash-quartz-ref.png \ leaky-dash-ref.png \ + leaky-dashed-rectangle-ref.png \ leaky-polygon-ref.png \ leaky-polygon-ps-ref.png \ linear-gradient-reflect-ref.png \ diff --git a/test/leaky-dashed-rectangle-ref.png b/test/leaky-dashed-rectangle-ref.png Binary files differnew file mode 100644 index 000000000..e432de268 --- /dev/null +++ b/test/leaky-dashed-rectangle-ref.png diff --git a/test/leaky-dashed-rectangle.c b/test/leaky-dashed-rectangle.c new file mode 100644 index 000000000..0d9e2460b --- /dev/null +++ b/test/leaky-dashed-rectangle.c @@ -0,0 +1,92 @@ +/* + * Copyright © 2008 Chris Wilson + * + * 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 + * Chris Wilson not be used in advertising or publicity pertaining to + * distribution of the software without specific, written prior + * permission. Chris Wilson makes no representations about the + * suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS + * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS, IN NO EVENT SHALL CHRIS WILSON 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: Chris Wilson <chris@chris-wilson.co.uk> + * Franz Schmid <Franz.Schmid@altmuehlnet.de> + */ + +/* Test case for bug reported by Franz Schmid <Franz.Schmid@altmuehlnet.de> + * http://lists.cairographics.org/archives/cairo/2008-April/013912.html + */ + +#include "cairo-test.h" + +#define WIDTH 60 +#define HEIGHT 60 + +static cairo_test_draw_function_t draw; + +cairo_test_t test = { + "leaky-dashed-rectangle", + "Exercises bug in which a dashed stroke leaks in from outside the surface", + WIDTH, HEIGHT, + draw +}; + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + const double dash[2] = {4, 2}; + + cairo_set_source_rgb (cr, 1, 1, 1); + cairo_paint (cr); + + cairo_set_source_rgb (cr, 0., 0., 0); + + cairo_translate (cr, 0.5, .5); + cairo_set_line_width (cr, 1); /* This is vital to reproduce the bug. */ + + /* First check simple rectangles */ + cairo_set_source_rgb (cr, 0., 0., 0); + cairo_rectangle (cr, -WIDTH/4, -HEIGHT/4, WIDTH, HEIGHT); + cairo_stroke (cr); + cairo_rectangle (cr, WIDTH+WIDTH/4, -HEIGHT/4, -WIDTH, HEIGHT); + cairo_stroke (cr); + cairo_rectangle (cr, -WIDTH/4, HEIGHT+HEIGHT/4, WIDTH, -HEIGHT); + cairo_stroke (cr); + cairo_rectangle (cr, WIDTH+WIDTH/4, HEIGHT+HEIGHT/4, -WIDTH, -HEIGHT); + cairo_stroke (cr); + + cairo_set_dash (cr, dash, 2, 0); + + /* And now dashed. */ + cairo_set_source_rgb (cr, 1., 0., 0); + cairo_rectangle (cr, -WIDTH/4, -HEIGHT/4, WIDTH, HEIGHT); + cairo_stroke (cr); + cairo_set_source_rgb (cr, 0., 1., 0); + cairo_rectangle (cr, WIDTH+WIDTH/4, -HEIGHT/4, -WIDTH, HEIGHT); + cairo_stroke (cr); + cairo_set_source_rgb (cr, 0., 0., 1); + cairo_rectangle (cr, -WIDTH/4, HEIGHT+HEIGHT/4, WIDTH, -HEIGHT); + cairo_stroke (cr); + cairo_set_source_rgb (cr, 1., 1., 0); + cairo_rectangle (cr, WIDTH+WIDTH/4, HEIGHT+HEIGHT/4, -WIDTH, -HEIGHT); + cairo_stroke (cr); + + return CAIRO_TEST_SUCCESS; +} + +int +main (void) +{ + return cairo_test (&test); +} |