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0db9e010fa
By ensuring that tests take longer than a couple of seconds we eliminate systematic errors in our measurements. However, we also effectively eliminate the synchronisation overhead. To compensate, we attempt to estimate the overhead by reporting the difference between a single instance and the minimum averaged instance.
103 lines
3.1 KiB
C
103 lines
3.1 KiB
C
/*
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* Copyright © 2006 Dan Amelang
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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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* the authors 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. The authors make 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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* THE AUTHORS DISCLAIM 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 THE AUTHORS 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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* Authors: Dan Amelang <dan@amelang.net>
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*
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* This test was originally created to test _cairo_fixed_from_double.
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* cairo_pattern_create_radial was selected as the entry point into
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* cairo as it makes several calls to _cairo_fixed_from_double and
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* presents a somewhat realistic use-case (although the RADIALS_COUNT
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* isn't very realistic).
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*/
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#include <time.h>
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#include "cairo-perf.h"
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#define RADIALS_COUNT (10000)
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static struct
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{
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double cx0;
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double cy0;
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double radius0;
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double cx1;
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double cy1;
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double radius1;
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} radials[RADIALS_COUNT];
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static double
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generate_double_in_range (double min, double max)
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{
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double d;
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d = rand () / (double) RAND_MAX;
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d *= max - min;
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d += min;
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return d;
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}
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static cairo_perf_ticks_t
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do_pattern_create_radial (cairo_t *cr, int width, int height, int loops)
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{
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cairo_perf_timer_start ();
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while (loops--) {
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cairo_pattern_t *pattern;
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int i;
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for (i = 0; i < RADIALS_COUNT; i++) {
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pattern =
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cairo_pattern_create_radial (radials[i].cx0, radials[i].cy0,
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radials[i].radius0,
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radials[i].cx1, radials[i].cy1,
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radials[i].radius1);
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cairo_pattern_destroy (pattern);
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}
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}
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cairo_perf_timer_stop ();
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return cairo_perf_timer_elapsed ();
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}
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void
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pattern_create_radial (cairo_perf_t *perf, cairo_t *cr, int width, int height)
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{
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int i;
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if (! cairo_perf_can_run (perf, "pattern-create-radial"))
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return;
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srand (time (0));
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for (i = 0; i < RADIALS_COUNT; i++)
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{
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radials[i].cx0 = generate_double_in_range (-50000.0, 50000.0);
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radials[i].cy0 = generate_double_in_range (-50000.0, 50000.0);
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radials[i].radius0 = generate_double_in_range (0.0, 1000.0);
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radials[i].cx1 = generate_double_in_range (-50000.0, 50000.0);
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radials[i].cy1 = generate_double_in_range (-50000.0, 50000.0);
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radials[i].radius1 = generate_double_in_range (0.0, 1000.0);
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}
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cairo_perf_run (perf, "pattern-create-radial",
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do_pattern_create_radial);
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}
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