test/long-dashed-lines.c

   1 /*
   2  * Copyright © 2008 Chris Wilson
   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  * the author not be used in advertising or publicity pertaining to
  10  * distribution of the software without specific, written prior
  11  * permission. The author 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  * THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
  16  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  17  * FITNESS, IN NO EVENT SHALL THE AUTHOR. 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: Chris Wilson <chris@chris-wilson.co.uk>
  24  */
  25
  26 #include "cairo-test.h"
  27
  28 static cairo_test_draw_function_t draw;
  29
  30 cairo_test_t test = {
  31     "long-dashed-lines",
  32     "Exercises _cairo_box_intersects_line_segment()",
  33     60, 60,
  34     draw
  35 };
  36
  37 static cairo_test_status_t
  38 draw (cairo_t *cr, int width, int height)
  39 {
  40     int i;
  41     double dashes[] = {6, 3};
  42
  43     cairo_set_source_rgb (cr, 1, 1, 1);
  44     cairo_paint (cr);
  45
  46     /* partially visible rectangle... */
  47     cairo_rectangle (cr, -0.5, -0.5, 61, 61);
  48
  49     /* rectangles with intersecting segments... */
  50     cairo_save (cr);
  51     cairo_translate (cr, 30, 30);
  52     for (i = 0; i < 4; i++) {
  53         cairo_rotate (cr, M_PI / 4);
  54         cairo_rectangle (cr, -37, -15, 74, 30);
  55     }
  56     cairo_restore (cr);
  57
  58     /* completely invisible rectangle */
  59     cairo_rectangle (cr, -5, -5, 70, 70);
  60
  61     cairo_set_dash (cr, dashes, sizeof (dashes) / sizeof (dashes[0]), 0.);
  62     cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
  63     cairo_set_line_join (cr, CAIRO_LINE_JOIN_BEVEL);
  64     cairo_set_source_rgb (cr, 0, 0, 0);
  65     cairo_stroke (cr);
  66
  67     return CAIRO_TEST_SUCCESS;
  68 }
  69
  70 int
  71 main (void)
  72 {
  73     return cairo_test (&test);
  74 }
  75