Grcov report - curve.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-perf.h"

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static uint32_t state;

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static double

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uniform_random (double minval, double maxval)

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    static uint32_t const poly = 0x9a795537U;

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    uint32_t n = 32;

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    while (n-->0)

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

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

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static cairo_time_t

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do_curve_stroke (cairo_t *cr, int width, int height, int loops)

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    state = 0xc0ffee;

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    cairo_set_line_width (cr, 2.);

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    cairo_perf_timer_start ();

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    while (loops--) {

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	double x1 = uniform_random (0, width);

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	double x2 = uniform_random (0, width);

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	double x3 = uniform_random (0, width);

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	double y1 = uniform_random (0, height);

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	double y2 = uniform_random (0, height);

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	double y3 = uniform_random (0, height);

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	cairo_move_to (cr, uniform_random (0, width), uniform_random (0, height));

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	cairo_curve_to (cr, x1, y1, x2, y2, x3, y3);

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	cairo_stroke(cr);

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    cairo_perf_timer_stop ();

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    return cairo_perf_timer_elapsed ();

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static cairo_time_t

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do_curve_fill (cairo_t *cr, int width, int height, int loops)

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    state = 0xc0ffee;

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    cairo_perf_timer_start ();

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    while (loops--) {

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	double x0 = uniform_random (0, width);

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	double x1 = uniform_random (0, width);

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	double x2 = uniform_random (0, width);

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	double x3 = uniform_random (0, width);

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	double xm = uniform_random (0, width);

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	double xn = uniform_random (0, width);

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	double y0 = uniform_random (0, height);

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	double y1 = uniform_random (0, height);

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	double y2 = uniform_random (0, height);

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	double y3 = uniform_random (0, height);

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	double ym = uniform_random (0, height);

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	double yn = uniform_random (0, height);

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	cairo_move_to (cr, xm, ym);

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	cairo_curve_to (cr, x1, y1, x2, y2, xn, yn);

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	cairo_curve_to (cr, x3, y3, x0, y0, xm, ym);

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	cairo_close_path (cr);

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	cairo_fill(cr);

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    cairo_perf_timer_stop ();

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    return cairo_perf_timer_elapsed ();

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cairo_bool_t

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curve_enabled (cairo_perf_t *perf)

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    return cairo_perf_can_run (perf, "curve", NULL);

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void

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curve (cairo_perf_t *perf, cairo_t *cr, int width, int height)

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    cairo_set_source_rgb (cr, 1., 1., 1.);

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    cairo_perf_run (perf, "curve-stroked", do_curve_stroke, NULL);

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    cairo_perf_run (perf, "curve-filled", do_curve_fill, NULL);

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