Grcov report - arc-looping-dash.c

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/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */

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/*

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 * Copyright 2010 Andrea Canciani

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 * Permission is hereby granted, free of charge, to any person

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 * obtaining a copy of this software and associated documentation

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 * files (the "Software"), to deal in the Software without

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 * restriction, including without limitation the rights to use, copy,

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 * modify, merge, publish, distribute, sublicense, and/or sell copies

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 * of the Software, and to permit persons to whom the Software is

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 * furnished to do so, subject to the following conditions:

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 * The above copyright notice and this permission notice shall be

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 * included in all copies or substantial portions of the Software.

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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

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 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

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 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

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 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

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 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

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 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

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 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

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 * SOFTWARE.

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 * Author: Andrea Canciani <ranma42@gmail.com>

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*/

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#include "cairo-test.h"

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#define SIZE 32

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/*

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  When cairo_arc is used to draw an arc of more than 2pi radians

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  (i.e. a circle "looping over itself"), various different behaviors

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  are possible:

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  - draw exactly a circle (an arc of 2pi radians)

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  - draw an arc such that the current point is the expected one and

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    that does at least a complete circle (an arc of [2pi, 4pi)

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    radians)

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  - draw an arc with the original number of loops

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  This test produces different results for each of these three cases.

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*/

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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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    double dashes[] = { 0.3, 7 };

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    cairo_set_source_rgb (cr, 1, 1, 1);

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3

    cairo_paint (cr);

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    cairo_save (cr);

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    cairo_translate (cr, SIZE * .5, SIZE * .5);

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3

    cairo_scale (cr, SIZE * 3 / 8., SIZE * 3 / 8.);

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3

    cairo_arc (cr, 0, 0, 1, 0, 11 * M_PI);

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    cairo_set_line_width (cr, 8. / SIZE);

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3

    cairo_set_source_rgb (cr, 0, 0, 0);

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3

    cairo_set_dash (cr, dashes, 2, 0);

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3

    cairo_stroke (cr);

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3

    cairo_restore (cr);

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    return CAIRO_TEST_SUCCESS;

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CAIRO_TEST (arc_looping_dash,

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	    "Test cairo_arc for angles describing more than a complete circle",

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	    "arc", /* keywords */

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	    NULL, /* requirements */

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	    SIZE, SIZE,

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	    NULL, draw)