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/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
/* cairo - a vector graphics library with display and print output
*
* Copyright (c) 2008 M Joonas Pihlaja
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include "cairo-perf.h"
#define NUM_SEGMENTS 256
static unsigned state;
static double
uniform_random (double minval, double maxval)
{
static unsigned const poly = 0x9a795537U;
unsigned n = 32;
while (n-->0)
state = 2*state < state ? (2*state ^ poly) : 2*state;
return minval + state * (maxval - minval) / 4294967296.0;
}
static cairo_time_t
draw_random (cairo_t *cr, cairo_fill_rule_t fill_rule,
int width, int height, int loops)
{
double x[NUM_SEGMENTS];
double y[NUM_SEGMENTS];
int i;
cairo_save (cr);
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_paint (cr);
for (i = 0; i < NUM_SEGMENTS; i++) {
x[i] = uniform_random (0, width);
y[i] = uniform_random (0, height);
}
state = 0x12345678;
cairo_translate (cr, 1, 1);
cairo_set_fill_rule (cr, fill_rule);
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_new_path (cr);
cairo_move_to (cr, 0, 0);
for (i = 0; i < NUM_SEGMENTS; i++)
cairo_line_to (cr, x[i], y[i]);
cairo_close_path (cr);
cairo_perf_timer_start ();
while (loops--)
cairo_fill_preserve (cr);
cairo_perf_timer_stop ();
cairo_restore (cr);
return cairo_perf_timer_elapsed ();
}
static cairo_time_t
draw_random_curve (cairo_t *cr, cairo_fill_rule_t fill_rule,
int width, int height, int loops)
{
double x[3*NUM_SEGMENTS];
double y[3*NUM_SEGMENTS];
int i;
cairo_save (cr);
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_paint (cr);
for (i = 0; i < 3*NUM_SEGMENTS; i++) {
x[i] = uniform_random (0, width);
y[i] = uniform_random (0, height);
}
state = 0x12345678;
cairo_translate (cr, 1, 1);
cairo_set_fill_rule (cr, fill_rule);
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_new_path (cr);
cairo_move_to (cr, 0, 0);
for (i = 0; i < NUM_SEGMENTS; i++) {
cairo_curve_to (cr,
x[3*i+0], y[3*i+0],
x[3*i+1], y[3*i+1],
x[3*i+2], y[3*i+2]);
}
cairo_close_path (cr);
cairo_perf_timer_start ();
while (loops--)
cairo_fill_preserve (cr);
cairo_perf_timer_stop ();
cairo_restore (cr);
return cairo_perf_timer_elapsed ();
}
static cairo_time_t
random_eo (cairo_t *cr, int width, int height, int loops)
{
return draw_random (cr, CAIRO_FILL_RULE_EVEN_ODD, width, height, loops);
}
static cairo_time_t
random_nz (cairo_t *cr, int width, int height, int loops)
{
return draw_random (cr, CAIRO_FILL_RULE_WINDING, width, height, loops);
}
static cairo_time_t
random_curve_eo (cairo_t *cr, int width, int height, int loops)
{
return draw_random_curve (cr, CAIRO_FILL_RULE_EVEN_ODD, width, height, loops);
}
static cairo_time_t
random_curve_nz (cairo_t *cr, int width, int height, int loops)
{
return draw_random_curve (cr, CAIRO_FILL_RULE_WINDING, width, height, loops);
}
void
intersections (cairo_perf_t *perf, cairo_t *cr, int width, int height)
{
if (! cairo_perf_can_run (perf, "intersections", NULL))
return;
cairo_perf_run (perf, "intersections-nz-fill", random_nz, NULL);
cairo_perf_run (perf, "intersections-eo-fill", random_eo, NULL);
cairo_perf_run (perf, "intersections-nz-curve-fill", random_curve_nz, NULL);
cairo_perf_run (perf, "intersections-eo-curve-fill", random_curve_eo, NULL);
}
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