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0db9e010fa
By ensuring that tests take longer than a couple of seconds we eliminate systematic errors in our measurements. However, we also effectively eliminate the synchronisation overhead. To compensate, we attempt to estimate the overhead by reporting the difference between a single instance and the minimum averaged instance.
114 lines
3.9 KiB
C
114 lines
3.9 KiB
C
/*
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* Copyright © 2007 Björn Lindqvist
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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: Björn Lindqvist <bjourne@gmail.com>
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*/
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#include "cairo-perf.h"
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/* This test case measures how much time cairo takes to render the
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* equivalent of the following gdk-pixbuf operation:
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*
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* gdk_pixbuf_composite_color(dest,
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* 0, 0, DST_SIZE, DST_SIZE,
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* 0, 0,
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* SCALE, SCALE,
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* gdk.INTERP_NEAREST,
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* 255,
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* 0, 0,
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* 8, 0x33333333, 0x88888888);
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*
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* Cairo is (at the time of writing) about 2-3 times as slow as
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* gdk-pixbuf.
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*/
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#define PAT_SIZE 16
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#define SRC_SIZE 64
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static cairo_pattern_t *checkerboard = NULL;
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static cairo_pattern_t *src_pattern = NULL;
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static cairo_perf_ticks_t
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do_composite_checker (cairo_t *cr,
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int width,
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int height,
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int loops)
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{
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/* Compute zoom so that the src_pattern covers the whole output image. */
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double xscale = width / (double) SRC_SIZE;
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double yscale = height / (double) SRC_SIZE;
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cairo_perf_timer_start ();
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while (loops--) {
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/* Fill the surface with our background. */
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cairo_identity_matrix (cr);
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cairo_set_source (cr, checkerboard);
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cairo_paint (cr);
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/* Draw the scaled image on top. */
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cairo_scale (cr, xscale, yscale);
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cairo_set_source (cr, src_pattern);
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cairo_paint (cr);
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}
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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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composite_checker (cairo_perf_t *perf,
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cairo_t *cr,
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int width,
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int height)
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{
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cairo_surface_t *image;
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if (! cairo_perf_can_run (perf, "composite-checker"))
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return;
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/* Create the checker pattern. We don't actually need to draw
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* anything on it since that wouldn't affect performance.
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*/
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image = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
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PAT_SIZE,
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PAT_SIZE);
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checkerboard = cairo_pattern_create_for_surface (image);
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cairo_pattern_set_filter (checkerboard, CAIRO_FILTER_NEAREST);
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cairo_pattern_set_extend (checkerboard, CAIRO_EXTEND_REPEAT);
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cairo_surface_destroy (image);
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/* Create the image source pattern. Again we use the NEAREST
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* filtering which should be fastest.
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*/
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image = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
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SRC_SIZE,
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SRC_SIZE);
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src_pattern = cairo_pattern_create_for_surface (image);
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cairo_pattern_set_filter (src_pattern, CAIRO_FILTER_NEAREST);
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cairo_surface_destroy (image);
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cairo_perf_run (perf, "composite-checker", do_composite_checker);
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cairo_pattern_destroy (checkerboard);
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cairo_pattern_destroy (src_pattern);
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}
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