test/dash-curve.c

   1 /*
   2  * Copyright © 2007 Jeff Smith
   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  * Jeff Smith not be used in advertising or publicity pertaining to
  10  * distribution of the software without specific, written prior
  11  * permission. Jeff Smith 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  * JEFF SMITH DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
  16  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  17  * FITNESS, IN NO EVENT SHALL JEFF SMITH 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: Jeff Smith <whydoubt@yahoo.com>
  24  */
  25
  26 #include "cairo-test.h"
  27
  28 static cairo_test_draw_function_t draw;
  29
  30 cairo_test_t test = {
  31     "dash-curve",
  32     "Tries to explore the state space of the dashing code along curves",
  33     25*60, 4*60,
  34     draw
  35 };
  36
  37 static cairo_test_status_t
  38 draw (cairo_t *cr, int width, int height)
  39 {
  40     double dashes[2] = {20, 20};
  41     int a=0, b=0, c=0;
  42
  43     cairo_set_source_rgb (cr, 0, 0, 0);
  44     cairo_paint (cr);
  45
  46     for (a=0; a<4; a++)
  47     for (b=0; b<5; b++)
  48     for (c=0; c<5; c++) {
  49         cairo_move_to (cr, ((b*5)+c)*60+10, a*60+10);
  50         cairo_rel_curve_to (cr,
  51                             0,      b*10,
  52                             0,      b*10,
  53                             c*10,   b*10);
  54
  55         cairo_set_source_rgb (cr, 1, 1, 1);
  56         cairo_set_line_width (cr, 8);
  57         cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
  58         cairo_set_dash (cr, dashes, 2, a*10);
  59         cairo_stroke_preserve (cr);
  60
  61         cairo_set_source_rgb (cr, 0, 0.5, 1);
  62         cairo_set_line_width (cr, 2);
  63         cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
  64         cairo_set_dash (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 }