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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 <assert.h>
#include "cairo-perf.h"
#define MAX_SEGMENTS 2560
typedef enum {
PIXALIGN, /* pixel aligned path */
NONALIGN /* unaligned path. */
} align_t;
typedef enum {
RECTCLOSE, /* keeps the path rectilinear */
DIAGCLOSE /* forces a diagonal */
} close_t;
static cairo_perf_ticks_t
draw_spiral (cairo_t *cr,
cairo_fill_rule_t fill_rule,
align_t align,
close_t close,
int width, int height, int loops)
{
int i;
int n=0;
double x[MAX_SEGMENTS];
double y[MAX_SEGMENTS];
int step = 3;
int side = width < height ? width : height;
assert(5*(side/step/2+1)+2 < MAX_SEGMENTS);
#define L(x_,y_) (x[n] = (x_), y[n] = (y_), n++)
#define M(x_,y_) L(x_,y_)
#define v(t) L(x[n-1], y[n-1] + (t))
#define h(t) L(x[n-1] + (t), y[n-1])
switch (align) {
case PIXALIGN: M(0,0); break;
case NONALIGN: M(0.1415926, 0.7182818); break;
}
while (side >= step && side >= 0) {
v(side);
h(side);
v(-side);
h(-side+step);
v(step);
side -= 2*step;
}
switch (close) {
case RECTCLOSE: L(x[n-1],y[0]); break;
case DIAGCLOSE: L(x[0],y[0]); break;
}
assert(n < MAX_SEGMENTS);
cairo_save (cr);
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_paint (cr);
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, x[0], y[0]);
for (i = 1; i < n; 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_perf_ticks_t
draw_spiral_eo_pa_re (cairo_t *cr, int width, int height, int loops)
{
return draw_spiral (cr,
CAIRO_FILL_RULE_EVEN_ODD,
PIXALIGN,
RECTCLOSE,
width, height, loops);
}
static cairo_perf_ticks_t
draw_spiral_nz_pa_re (cairo_t *cr, int width, int height, int loops)
{
return draw_spiral (cr,
CAIRO_FILL_RULE_WINDING,
PIXALIGN,
RECTCLOSE,
width, height, loops);
}
static cairo_perf_ticks_t
draw_spiral_eo_na_re (cairo_t *cr, int width, int height, int loops)
{
return draw_spiral (cr,
CAIRO_FILL_RULE_EVEN_ODD,
NONALIGN,
RECTCLOSE,
width, height, loops);
}
static cairo_perf_ticks_t
draw_spiral_nz_na_re (cairo_t *cr, int width, int height, int loops)
{
return draw_spiral (cr,
CAIRO_FILL_RULE_WINDING,
NONALIGN,
RECTCLOSE,
width, height, loops);
}
static cairo_perf_ticks_t
draw_spiral_eo_pa_di (cairo_t *cr, int width, int height, int loops)
{
return draw_spiral (cr,
CAIRO_FILL_RULE_EVEN_ODD,
PIXALIGN,
DIAGCLOSE,
width, height, loops);
}
static cairo_perf_ticks_t
draw_spiral_nz_pa_di (cairo_t *cr, int width, int height, int loops)
{
return draw_spiral (cr,
CAIRO_FILL_RULE_WINDING,
PIXALIGN,
DIAGCLOSE,
width, height, loops);
}
static cairo_perf_ticks_t
draw_spiral_eo_na_di (cairo_t *cr, int width, int height, int loops)
{
return draw_spiral (cr,
CAIRO_FILL_RULE_EVEN_ODD,
NONALIGN,
DIAGCLOSE,
width, height, loops);
}
static cairo_perf_ticks_t
draw_spiral_nz_na_di (cairo_t *cr, int width, int height, int loops)
{
return draw_spiral (cr,
CAIRO_FILL_RULE_WINDING,
NONALIGN,
DIAGCLOSE,
width, height, loops);
}
void
spiral (cairo_perf_t *perf, cairo_t *cr, int width, int height)
{
if (! cairo_perf_can_run (perf, "spiral"))
return;
cairo_perf_run (perf, "spiral-diag-nonalign-evenodd-fill", draw_spiral_eo_na_di);
cairo_perf_run (perf, "spiral-diag-nonalign-nonzero-fill", draw_spiral_nz_na_di);
cairo_perf_run (perf, "spiral-diag-pixalign-evenodd-fill", draw_spiral_eo_pa_di);
cairo_perf_run (perf, "spiral-diag-pixalign-nonzero-fill", draw_spiral_nz_pa_di);
cairo_perf_run (perf, "spiral-rect-nonalign-evenodd-fill", draw_spiral_eo_na_re);
cairo_perf_run (perf, "spiral-rect-nonalign-nonzero-fill", draw_spiral_nz_na_re);
cairo_perf_run (perf, "spiral-rect-pixalign-evenodd-fill", draw_spiral_eo_pa_re);
cairo_perf_run (perf, "spiral-rect-pixalign-nonzero-fill", draw_spiral_nz_pa_re);
}
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