cairo/perf/box-outline.c

   1 /*
   2  * Copyright © 2006 Red Hat, Inc.
   3  *
   4  *
   5  * Permission is hereby granted, free of charge, to any person
   6  * obtaining a copy of this software and associated documentation
   7  * files (the "Software"), to deal in the Software without
   8  * restriction, including without limitation the rights to use, copy,
   9  * modify, merge, publish, distribute, sublicense, and/or sell copies
  10  * of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be
  14  * included in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  20  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  21  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Author: Carl D. Worth <cworth@cworth.org>
  26  */
  27
  28 #include "cairo-perf.h"
  29
  30 /* This test case is designed to illustrate a performance bug that
  31  * exists in cairo in which using cairo_stroke is much slower than
  32  * cairo_fill to draw an identical figure, (and in particular a figure
  33  * that is much more natural to draw with cairo_stroke). The figure is
  34  * a 100x100 square outline 1-pixel wide, nicely pixel aligned.
  35  *
  36  * The performance bug should affect any path whose resulting contour
  37  * consists only of pixel-aligned horizontal and vertical elements.
  38  *
  39  * Initial testing on on machine shows stroke as 5x slower than fill
  40  * for the xlib backend and 16x slower for the image backend.
  41  */
  42
  43 static cairo_perf_ticks_t
  44 box_outline_stroke (cairo_t *cr, int width, int height)
  45 {
  46     cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
  47     cairo_paint (cr);
  48
  49     cairo_rectangle (cr,
  50                      1.5, 1.5,
  51                      width - 3, height - 3);
  52     cairo_set_line_width (cr, 1.0);
  53     cairo_set_source_rgb (cr, 1, 0, 0); /* red */
  54
  55     cairo_perf_timer_start ();
  56
  57     cairo_stroke (cr);
  58
  59     cairo_perf_timer_stop ();
  60
  61     return cairo_perf_timer_elapsed ();
  62 }
  63
  64 static cairo_perf_ticks_t
  65 box_outline_fill (cairo_t *cr, int width, int height)
  66 {
  67     cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
  68     cairo_paint (cr);
  69
  70     cairo_rectangle (cr,
  71                      1.0, 1.0,
  72                      width - 2, height - 2);
  73     cairo_rectangle (cr,
  74                      2.0, 2.0,
  75                      width - 4, height - 4);
  76     cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
  77     cairo_set_source_rgb (cr, 0, 1, 0); /* green */
  78
  79     cairo_perf_timer_start ();
  80
  81     cairo_fill (cr);
  82
  83     cairo_perf_timer_stop ();
  84
  85     return cairo_perf_timer_elapsed ();
  86 }
  87
  88 void
  89 box_outline (cairo_perf_t *perf, cairo_t *cr, int width, int height)
  90 {
  91     cairo_perf_run (perf, "box-outline-stroke", box_outline_stroke);
  92     cairo_perf_run (perf, "box-outline-fill", box_outline_fill);
  93 }