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1ed3811338
This test shows that drawing a 100x100 single-pixel wide box outline is currently 5 to 16 times slower when using the natural cairo_stroke() as compared to a rather awkward cairo_fill() of two rectangles. [ # ] backend-content test-size min(ticks) min(ms) median(ms) stddev. iterations [ 0] image-rgba box-outline-stroke-100 301321 0.218 0.219 0.39% 5 [ 1] image-rgba box-outline-fill-100 18178 0.013 0.013 0.43% 5 [ 0] xlib-rgba box-outline-stroke-100 379177 0.275 0.276 1.39% 6 [ 1] xlib-rgba box-outline-fill-100 83355 0.060 0.060 0.17% 5
93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
/*
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* Copyright © 2006 Red Hat, Inc.
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*
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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: Carl D. Worth <cworth@cworth.org>
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*/
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#include "cairo-perf.h"
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/* This test case is designed to illustrate a performance bug that
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* exists in cairo in which using cairo_stroke is much slower than
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* cairo_fill to draw an identical figure, (and in particular a figure
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* that is much more natural to draw with cairo_stroke). The figure is
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* a 100x100 square outline 1-pixel wide, nicely pixel aligned.
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*
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* The performance bug should affect any path whose resulting contour
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* consists only of pixel-aligned horizontal and vertical elements.
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*
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* Initial testing on on machine shows stroke as 5x slower than fill
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* for the xlib backend and 16x slower for the image backend.
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*/
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static cairo_perf_ticks_t
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box_outline_stroke (cairo_t *cr, int width, int height)
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{
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cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
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cairo_paint (cr);
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cairo_rectangle (cr,
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1.5, 1.5,
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width - 3, height - 3);
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cairo_set_line_width (cr, 1.0);
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cairo_set_source_rgb (cr, 1, 0, 0); /* red */
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cairo_perf_timer_start ();
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cairo_stroke (cr);
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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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static cairo_perf_ticks_t
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box_outline_fill (cairo_t *cr, int width, int height)
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{
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cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
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cairo_paint (cr);
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cairo_rectangle (cr,
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1.0, 1.0,
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width - 2, height - 2);
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cairo_rectangle (cr,
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2.0, 2.0,
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width - 4, height - 4);
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cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
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cairo_set_source_rgb (cr, 0, 1, 0); /* green */
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cairo_perf_timer_start ();
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cairo_fill (cr);
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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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box_outline (cairo_perf_t *perf, cairo_t *cr, int width, int height)
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{
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cairo_perf_run (perf, "box-outline-stroke", box_outline_stroke);
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cairo_perf_run (perf, "box-outline-fill", box_outline_fill);
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}
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