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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.
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/*
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* Copyright © 2006 Red Hat, Inc.
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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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* Red Hat, Inc. 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. Red Hat, Inc. 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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*
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* RED HAT, INC. 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 RED HAT, INC. 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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* Author: Carl D. Worth <cworth@cworth.org>
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*/
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#include "cairo-perf.h"
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static cairo_perf_ticks_t
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do_text (cairo_t *cr, int width, int height, int loops)
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{
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const char text[] = "the jay, pig, fox, zebra and my wolves quack";
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int len = strlen (text);
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double x, y;
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int i = 0, j = 0;
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cairo_set_font_size (cr, 9);
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cairo_perf_timer_start ();
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while (loops--) {
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do {
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cairo_move_to (cr, 0, j++ * 10);
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cairo_show_text (cr, text + i);
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cairo_get_current_point (cr, &x, &y);
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while (x < width && cairo_status (cr) == CAIRO_STATUS_SUCCESS) {
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cairo_show_text (cr, text);
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cairo_get_current_point (cr, &x, &y);
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}
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if (++i >= len)
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i = 0;
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} while (y < height && cairo_status (cr) == CAIRO_STATUS_SUCCESS);
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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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text (cairo_perf_t *perf, cairo_t *cr, int width, int height)
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{
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if (! cairo_perf_can_run (perf, "text"))
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return;
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cairo_perf_cover_sources_and_operators (perf, "text", do_text);
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}
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