testcases/phpCairo/line-width-scale.php

   1 <?
   2 function spline_path ()
   3 {
   4     global $spline,$con;
   5     $con->save ();
   6     {
   7         $con->move_to (
   8                        - $spline, 0);
   9         $con->curve_to (
  10                         - $spline / 4, - $spline,
  11                           $spline / 4,   $spline,
  12                           $spline, 0);
  13     }
  14     $con->restore ();
  15 }
  16
  17 function scale_then_set_line_width_and_stroke ()
  18 {
  19     global $con,$xscale,$yscale,$linewidth;
  20     $con->scale ( $xscale, $yscale);
  21     $con->set_line_width ( $linewidth);
  22     spline_path ();
  23     $con->stroke ();
  24 }
  25
  26 function scale_path_and_line_width ()
  27 {
  28     global $con, $xscale, $yscale,$linewidth;
  29     $con->save ();
  30     {
  31         $con->scale ( $xscale, $yscale);
  32         spline_path ();
  33     }
  34     $con->restore ();
  35
  36     $con->save ();
  37     {
  38         $con->scale ( $xscale, $yscale);
  39         $con->set_line_width ( $linewidth);
  40         $con->stroke ();
  41     }
  42     $con->restore ();
  43 }
  44
  45 function set_line_width_then_scale_and_stroke()
  46 {
  47     global $con, $xscale, $yscale,$linewidth;
  48     $con->set_line_width ( $linewidth);
  49     $con->scale ( $xscale, $yscale);
  50     spline_path ();
  51     $con->stroke ();
  52 }
  53
  54 function scale_path_not_line_width ()
  55 {
  56     global $con, $xscale, $yscale,$linewidth;
  57
  58     $con->save ();
  59     {
  60         $con->scale ( $xscale, $yscale);
  61         spline_path ();
  62     }
  63     $con->restore ();
  64
  65     $con->save ();
  66     {
  67         $con->set_line_width ( $linewidth);
  68         $con->stroke ();
  69     }
  70     $con->restore ();
  71 }
  72
  73  $linewidth = 13;
  74  $spline = 50.0;
  75  $xscale  = 0.5;
  76  $yscale  = 2.0;
  77  $width = ($xscale * $spline * 6.0);
  78  $height = ($yscale * $spline * 2.0);
  79  $sur = new CairoImageSurface(FORMAT_ARGB32, $width, $height);
  80  $con = new CairoContext($sur);
  81  $con->set_source_rgb ( 1.0, 1.0, 1.0); /* white */
  82  $con->paint ();
  83  $con->set_source_rgb ( 0.0, 0.0, 0.0); /* black */
  84  for($i =0 ; $i<4;$i++) {
  85         $con->save();
  86 //      $con->translate($width/4 + ($i % 2)*$width/2, $height/4 + ($i/2)*$height/2);
  87         switch($i) {
  88         case 0:
  89                 $con->translate($width/4 , $height/4);
  90                 scale_then_set_line_width_and_stroke();
  91                 break;
  92         case 1:
  93                 $con->translate($width/4 + $width/2, $height/4);
  94                 scale_path_and_line_width();
  95                 break;
  96         case 2:
  97                 $con->translate($width/4, $height/4 + $height/2);
  98                 set_line_width_then_scale_and_stroke();
  99                 break;
 100         case 3:
 101                 $con->translate($width/4 + $width/2, $height/4 + $height/2);
 102                 scale_path_not_line_width();
 103                 break;
 104         }
 105 $con->restore();
 106 }
 107 $sur->write_to_png("line-width-scale-php.png");
 108 ?>
 109
 110
 111