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/*
* Copyright © 2008 Red Hat, Inc.
*
* 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: Carl D. Worth <cworth@cworth.org>
*/
#include "cairo-test.h"
#define LINE_WIDTH 10
#define PAD 2
#define WIDTH (PAD + LINE_WIDTH + PAD)
#define HEIGHT (WIDTH)
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_translate (cr, PAD, PAD);
/* Paint background white, then draw in black. */
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
cairo_paint (cr);
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
cairo_set_line_width (cr, LINE_WIDTH);
/* The default miter limit value of 10.0 guarantees that
* right-angle turns, (in fact, any angle greater than 11
* degrees), gets a miter rather than a bevel join. The
* rectilinear stroke optimization was originally written in a
* buggy way that did not respect the miter limit, (that is,
* inappropriately drawing miter joins when the miter limit would
* turn them into bevels). So we draw here with a miter limit of
* 1.0 to force all miter joins into bevels. */
cairo_set_line_join (cr, CAIRO_LINE_JOIN_MITER);
cairo_set_miter_limit (cr, 1.0);
cairo_move_to (cr, LINE_WIDTH / 2.0, LINE_WIDTH);
cairo_rel_line_to (cr, 0, - LINE_WIDTH / 2.0);
cairo_rel_line_to (cr, LINE_WIDTH / 2.0, 0);
cairo_stroke (cr);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (rectilinear_miter_limit,
"Test that the rectilinear stroke optimization doesn't break cairo_set_miter_limit",
"miter, stroke, stress", /* keywords */
NULL, /* requirements */
WIDTH, HEIGHT,
NULL, draw)