Grcov report - drunkard-tails.c

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/*

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 * Copyright © 2011 Intel Corporation

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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: Chris Wilson <chris@chris-wilson.co.uk>

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*/

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#include "cairo-test.h"

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#define LINE_WIDTH	10.

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#define SIZE		(5 * LINE_WIDTH)

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#define PAD		(3 * LINE_WIDTH)

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static uint32_t state;

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static double

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3600

uniform_random (double minval, double maxval)

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    static uint32_t const poly = 0x9a795537U;

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3600

    uint32_t n = 32;

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118800

    while (n-->0)

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115200

	state = 2*state < state ? (2*state ^ poly) : 2*state;

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3600

    return minval + state * (maxval - minval) / 4294967296.0;

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static void

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make_path (cairo_t *cr)

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    int i;

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    state = 0xdeadbeef;

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    cairo_move_to (cr, SIZE/2, SIZE/2);

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3618

    for (i = 0; i < 200; i++) {

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3600

	double theta = uniform_random (-M_PI, M_PI);

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3600

	cairo_rel_line_to (cr,

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3600

			   cos (theta) * LINE_WIDTH / 4,

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3600

			   sin (theta) * LINE_WIDTH / 4);

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18

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static void

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draw_caps_joins (cairo_t *cr)

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    cairo_save (cr);

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    cairo_translate (cr, PAD, PAD);

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    cairo_reset_clip (cr);

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    cairo_rectangle (cr, 0, 0, SIZE, SIZE);

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    cairo_clip (cr);

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    make_path (cr);

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    cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);

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    cairo_set_line_join (cr, CAIRO_LINE_JOIN_BEVEL);

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    cairo_stroke (cr);

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    cairo_translate (cr, SIZE + PAD, 0.);

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    cairo_reset_clip (cr);

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    cairo_rectangle (cr, 0, 0, SIZE, SIZE);

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    cairo_clip (cr);

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    make_path (cr);

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    cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);

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    cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);

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    cairo_stroke (cr);

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    cairo_translate (cr, SIZE + PAD, 0.);

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    cairo_reset_clip (cr);

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    cairo_rectangle (cr, 0, 0, SIZE, SIZE);

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    cairo_clip (cr);

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    make_path (cr);

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    cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);

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    cairo_set_line_join (cr, CAIRO_LINE_JOIN_MITER);

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    cairo_stroke (cr);

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    cairo_restore (cr);

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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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    /* We draw in the default black, so paint white first. */

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3

    cairo_save (cr);

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    cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */

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3

    cairo_paint (cr);

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3

    cairo_restore (cr);

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3

    cairo_set_line_width (cr, LINE_WIDTH);

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3

    draw_caps_joins (cr);

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3

    cairo_save (cr);

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    /* and reflect to generate the opposite vertex ordering */

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3

    cairo_translate (cr, 0, height);

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3

    cairo_scale (cr, 1, -1);

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3

    draw_caps_joins (cr);

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    cairo_restore (cr);

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    cairo_translate (cr, 0, SIZE + PAD);

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3

    return CAIRO_TEST_SUCCESS;

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CAIRO_TEST (drunkard_tails,

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	    "Test caps and joins on short tail segments",

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	    "stroke, cap, join", /* keywords */

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	    NULL, /* requirements */

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	    3 * (PAD + SIZE) + PAD,

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	    2 * (PAD + SIZE) + PAD,

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	    NULL, draw)

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