cairo/perf/subimage_copy.c

   1 /*
   2  * Copyright © 2006 Red Hat, Inc.
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software
   5  * and its documentation for any purpose is hereby granted without
   6  * fee, provided that the above copyright notice appear in all copies
   7  * and that both that copyright notice and this permission notice
   8  * appear in supporting documentation, and that the name of
   9  * Red Hat, Inc. not be used in advertising or publicity pertaining to
  10  * distribution of the software without specific, written prior
  11  * permission. Red Hat, Inc. makes no representations about the
  12  * suitability of this software for any purpose.  It is provided "as
  13  * is" without express or implied warranty.
  14  *
  15  * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
  16  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  17  * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
  18  * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  19  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  20  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
  21  * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  22  *
  23  * Author: Carl D. Worth <cworth@cworth.org>
  24  */
  25
  26 #include "cairo-perf.h"
  27
  28 /* This case exposes a performance bug found by Christopher "Monty"
  29  * Montgomery in that copying a tiny portion of an image surface to an
  30  * X surface causes the entire image surface to be copied to an
  31  * intermediate surface.
  32  *
  33  * If the performance bug is fixed, then the time this test takes
  34  * should be independent of the source and destination surface sizes.
  35  */
  36
  37 static cairo_perf_ticks_t
  38 do_subimage_copy (cairo_t *cr, int width, int height)
  39 {
  40     cairo_rectangle (cr, 2, 2, 4, 4);
  41     cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
  42
  43     cairo_perf_timer_start ();
  44
  45     cairo_fill (cr);
  46
  47     cairo_perf_timer_stop ();
  48
  49     return cairo_perf_timer_elapsed ();
  50 }
  51
  52 void
  53 subimage_copy (cairo_perf_t *perf, cairo_t *cr, int width, int height)
  54 {
  55     cairo_surface_t *image;
  56     cairo_t *cr2;
  57
  58     cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
  59     cairo_paint (cr);
  60
  61     image = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
  62     cr2 = cairo_create (image);
  63     cairo_set_source_rgb (cr2, 1, 0, 0); /* red */
  64     cairo_paint (cr2);
  65     cairo_destroy (cr2);
  66
  67     cairo_set_source_surface (cr, image, 0, 0);
  68     cairo_surface_destroy (image);
  69
  70     cairo_perf_run (perf, "subimage_copy", do_subimage_copy);
  71 }