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1dc1b57b4e
This adds a new function which has as its only effect the elimination of the current point. This makes it much easier to use the various cairo_arc calls when the initial line_to is not actually desired. This function also unifies and generalizes the long-existing behavior of cairo_line_to being treated as cairo_move_to when there is no current point. With the addition of cairo_new_sub_path this becomes a documented feature with similar behavior in cairo_curve_to as well.
79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
/*
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* Copyright © 2005 Red Hat, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without
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* fee, provided that the above copyright notice appear in all copies
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* and that both that copyright notice and this permission notice
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* appear in supporting documentation, and that the name of
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* Red Hat, Inc. not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior
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* permission. Red Hat, Inc. makes no representations about the
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* suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
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* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: Carl D. Worth <cworth@cworth.org>
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*/
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#include "cairo-test.h"
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#define SIZE 10
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cairo_test_t test = {
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"new-sub-path",
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"Test the cairo_new_sub_path call",
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8 * SIZE,
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3 * SIZE
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};
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static cairo_test_status_t
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draw (cairo_t *cr, int width, int height)
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{
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cairo_set_source_rgb (cr, 0.0, 0.0, 1.0); /* blue */
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/* Test cairo_new_sub_path followed by several different
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* path-modification functions in turn...
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*/
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/* ... cairo_move_to */
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cairo_new_sub_path (cr);
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cairo_move_to (cr, SIZE, SIZE);
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cairo_line_to (cr, SIZE, 2 * SIZE);
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/* ... cairo_line_to */
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cairo_new_sub_path (cr);
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cairo_line_to (cr, 2 * SIZE, 1.5 * SIZE);
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cairo_line_to (cr, 3 * SIZE, 1.5 * SIZE);
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/* ... cairo_curve_to */
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cairo_new_sub_path (cr);
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cairo_curve_to (cr,
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4.0 * SIZE, 1.5 * SIZE,
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4.5 * SIZE, 1.0 * SIZE,
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5.0 * SIZE, 1.5 * SIZE);
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/* ... cairo_arc */
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cairo_new_sub_path (cr);
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cairo_arc (cr,
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6.5 * SIZE, 1.5 * SIZE,
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0.5 * SIZE,
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0.0, 2.0 * M_PI);
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cairo_stroke (cr);
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return CAIRO_TEST_SUCCESS;
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}
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int
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main (void)
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{
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return cairo_test (&test, draw);
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}
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