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Diffstat (limited to 'test/curve-to-as-line-to.c')
| -rw-r--r-- | test/curve-to-as-line-to.c | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/test/curve-to-as-line-to.c b/test/curve-to-as-line-to.c deleted file mode 100644 index 07eb005f5..000000000 --- a/test/curve-to-as-line-to.c +++ /dev/null @@ -1,95 +0,0 @@ -/* - * Copyright © 2005 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> - */ - -#include "cairo-test.h" - -#define SIZE 30 - -/* At one point, an optimization was proposed for cairo in which a - * curve_to would be optimized as a line_to. The initial (buggy) - * implementation verified that the slopes of several segments of the - * spline's control polygon were identical, but left open the - * possibility of an anti-parallel slope for one segment. - * - * For example, given a spline with collinear control points (A,B,C,D) - * positioned as follows: - * - * C--A--B--D - * - * The code verified identical slopes for AB, CD, and AD. The missing - * check for the BC segment allowed it to be anti-parallel to the - * others as above, and hence invalid to replace this spline with the - * AD line segment. - */ -static cairo_test_status_t -draw (cairo_t *cr, int width, int height) -{ - cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */ - cairo_paint (cr); - - cairo_set_line_width (cr, 1.0); - cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT); - cairo_set_line_join (cr, CAIRO_LINE_JOIN_BEVEL); - cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */ - - cairo_translate (cr, 0, 1.0); - - /* The CABD spline as described above. We ensure that the spline - * folds over on itself outside the bounds of the image to avoid - * the reference image having the curved portion of that fold, - * (which would just be harder to match in all the backends than - * we really want). */ - cairo_move_to (cr, - 10.5, 0.5); - cairo_curve_to (cr, - 11.5, 0.5, - -25.0, 0.5, - 31.0, 0.5); - - cairo_stroke (cr); - - cairo_translate (cr, 0, 2.0); - - /* A reflected version: DBAC */ - cairo_move_to (cr, - 19.5, 0.5); - - cairo_curve_to (cr, - 18.5, 0.5, - 55.0, 0.5, - -1.0, 0.5); - - cairo_stroke (cr); - - return CAIRO_TEST_SUCCESS; -} - -CAIRO_TEST (curve_to_as_line_to, - "Test optimization treating curve_to as line_to", - "path", /* keywords */ - NULL, /* requirements */ - 30, - 5, - NULL, draw) |