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d953161f88
An intersection variant to exercise the stroker with many, many lines. A silly benchmark, but a popular one in the wild. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/*
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* Copyright © 2011 Intel Corporation
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*
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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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*
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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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*
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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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*
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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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{
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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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}
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static cairo_perf_ticks_t
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do_many_strokes (cairo_t *cr, int width, int height, int loops)
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{
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int count;
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/* lots and lots of overlapping strokes */
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state = 0xc0ffee;
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for (count = 0; count < 1000; count++) {
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cairo_line_to (cr,
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uniform_random (0, width),
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uniform_random (0, height));
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}
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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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cairo_stroke_preserve (cr);
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cairo_perf_timer_stop ();
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cairo_new_path (cr);
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return cairo_perf_timer_elapsed ();
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}
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void
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many_strokes (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, "many-strokes", NULL))
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return;
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cairo_perf_run (perf, "many-strokes", do_many_strokes, NULL);
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}
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