testcases/phpCairo/degenerate-path.php

   1 <?
   2 $sur = new CairoImageSurface(FORMAT_ARGB32,3*(3+6+3), 8*(6+3) + 3);
   3 $con = new CairoContext($sur);
   4
   5
   6     $cap = array(LINE_CAP_ROUND, LINE_CAP_SQUARE, LINE_CAP_BUTT);
   7
   8     $dash = array(2.0, 2.0);
   9     $dash_long = array(6.0, 6.0);
  10
  11     $con->set_source_rgb ( 1, 0, 0);
  12
  13     for ($i=0; $i<3; $i++) {
  14         $con->save ();
  15
  16         $con->set_line_cap ( $cap[$i]);
  17
  18         /* simple degenerate paths */
  19         $con->set_line_width ( 6);
  20         $con->move_to ( 6, 6);
  21         $con->line_to ( 6, 6);
  22         $con->stroke ();
  23
  24         $con->translate ( 0, 3*3);
  25         $con->move_to ( 6, 6);
  26         $con->close_path ();
  27         $con->stroke ();
  28
  29         /* degenerate paths starting with dash on */
  30         $con->set_dash ( $dash, 2, 0.);
  31
  32         $con->translate ( 0, 3*3);
  33         $con->move_to ( 6, 6);
  34         $con->line_to ( 6, 6);
  35         $con->stroke ();
  36
  37         $con->translate ( 0, 3*3);
  38         $con->move_to ( 6, 6);
  39         $con->close_path ();
  40         $con->stroke ();
  41
  42         /* degenerate paths starting with dash off */
  43         /* these should not draw anything */
  44         $con->set_dash ( $dash, 2, 2.);
  45
  46         $con->translate ( 0, 3*3);
  47         $con->move_to ( 6, 6);
  48         $con->line_to ( 6, 6);
  49         $con->stroke ();
  50
  51         $con->translate ( 0, 3*3);
  52         $con->move_to ( 6, 6);
  53         $con->close_path ();
  54         $con->stroke ();
  55
  56         /* this should draw a single degenerate sub-path
  57          * at the end of the path */
  58         $con->set_dash ( $dash_long, 2, 6.);
  59
  60         $con->translate ( 0, 3*3);
  61         $con->move_to ( 6 + 6.0, 6);
  62         $con->line_to ( 6, 6);
  63         $con->stroke ();
  64
  65         /* this should draw a single degenerate sub-path
  66          * at the end of the path. The difference between this
  67          * and the above is that this ends with a degenerate sub-path*/
  68         $con->set_dash ( $dash_long, 2, 6.);
  69
  70         $con->translate ( 0, 3*3);
  71         $con->move_to ( 6 + 6.0, 6);
  72         $con->line_to ( 6, 6);
  73         $con->line_to ( 6, 6);
  74         $con->stroke ();
  75
  76         $con->restore ();
  77
  78         $con->translate ( 3+6+3, 0);
  79     }
  80 $sur->write_to_png("degenerate-path-php.png");
  81 ?>