Grcov report - degenerate-path.c

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/*

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 * Copyright © 2006 Jeff Muizelaar

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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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 * Jeff Muizelaar 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. Jeff Muizelaar 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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 * JEFF MUIZELAAR 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 JEFF MUIZELAAR 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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 * Author: Jeff Muizelaar <jeff@infidigm.net>

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*/

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#include "cairo-test.h"

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#define PAD 3.0

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#define LINE_WIDTH 6.0

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static cairo_test_status_t

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3

draw (cairo_t *cr, int width, int height)

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3

    const cairo_line_cap_t cap[] = { CAIRO_LINE_CAP_ROUND, CAIRO_LINE_CAP_SQUARE, CAIRO_LINE_CAP_BUTT };

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    size_t i;

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3

    double dash[] = {2, 2};

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3

    double dash_long[] = {6, 6};

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3

    cairo_set_source_rgb (cr, 1, 0, 0);

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    for (i = 0; i < ARRAY_LENGTH (cap); i++) {

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	cairo_save (cr);

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	cairo_set_line_cap (cr, cap[i]);

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	/* simple degenerate paths */

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	cairo_set_line_width (cr, LINE_WIDTH);

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	cairo_move_to (cr, LINE_WIDTH, LINE_WIDTH);

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	cairo_line_to (cr, LINE_WIDTH, LINE_WIDTH);

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	cairo_stroke (cr);

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	cairo_translate (cr, 0, 3*PAD);

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	cairo_move_to (cr, LINE_WIDTH, LINE_WIDTH);

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	cairo_close_path (cr);

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	cairo_stroke (cr);

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	/* degenerate paths starting with dash on */

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	cairo_set_dash (cr, dash, 2, 0.);

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	cairo_translate (cr, 0, 3*PAD);

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	cairo_move_to (cr, LINE_WIDTH, LINE_WIDTH);

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	cairo_line_to (cr, LINE_WIDTH, LINE_WIDTH);

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	cairo_stroke (cr);

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	cairo_translate (cr, 0, 3*PAD);

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	cairo_move_to (cr, LINE_WIDTH, LINE_WIDTH);

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	cairo_close_path (cr);

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	cairo_stroke (cr);

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	/* degenerate paths starting with dash off */

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	/* these should not draw anything */

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	cairo_set_dash (cr, dash, 2, 2.);

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	cairo_translate (cr, 0, 3*PAD);

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	cairo_move_to (cr, LINE_WIDTH, LINE_WIDTH);

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	cairo_line_to (cr, LINE_WIDTH, LINE_WIDTH);

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	cairo_stroke (cr);

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	cairo_translate (cr, 0, 3*PAD);

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	cairo_move_to (cr, LINE_WIDTH, LINE_WIDTH);

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	cairo_close_path (cr);

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	cairo_stroke (cr);

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	/* this should draw a single degenerate sub-path

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	 * at the end of the path */

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	cairo_set_dash (cr, dash_long, 2, 6.);

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	cairo_translate (cr, 0, 3*PAD);

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	cairo_move_to (cr, LINE_WIDTH + 6.0, LINE_WIDTH);

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	cairo_line_to (cr, LINE_WIDTH, LINE_WIDTH);

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	cairo_stroke (cr);

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	/* this should draw a single degenerate sub-path

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	 * at the end of the path. The difference between this

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	 * and the above is that this ends with a degenerate sub-path*/

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	cairo_set_dash (cr, dash_long, 2, 6.);

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	cairo_translate (cr, 0, 3*PAD);

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	cairo_move_to (cr, LINE_WIDTH + 6.0, LINE_WIDTH);

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	cairo_line_to (cr, LINE_WIDTH, LINE_WIDTH);

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	cairo_line_to (cr, LINE_WIDTH, LINE_WIDTH);

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	cairo_stroke (cr);

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	cairo_restore (cr);

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	cairo_translate (cr, PAD+LINE_WIDTH+PAD, 0);

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3

    return CAIRO_TEST_SUCCESS;

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/*

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 * XFAIL: undefined behaviour in PS, needs path editing to convert degenerate

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 * segments into circles/rectangles as expected by cairo

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*/

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CAIRO_TEST (degenerate_path,

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	    "Tests the behaviour of degenerate paths with different cap types",

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	    "degenerate", /* keywords */

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	    NULL, /* requirements */

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	    3*(PAD+LINE_WIDTH+PAD), 8*(LINE_WIDTH+PAD) + PAD,

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	    NULL, draw)