testcases/phpCairo/self-copy.php

   1 <?
   2         $size = 40;
   3         $sur = new CairoImageSurface(FORMAT_ARGB32, $size, $size);
   4     $con = new CairoContext($sur);
   5         $con->set_source_rgb ( 1, 1, 1);        /* White */
   6     $con->paint ();
   7
   8     $con->move_to ( $size,    0);
   9     $con->line_to ( $size, $size);
  10     $con->line_to ( 0,    $size);
  11
  12     $con->set_source_rgb ( 0, 0, 0);
  13     $con->fill ();
  14
  15     /* Create a pattern with the target surface as the source,
  16      * offset by $size/2
  17      */
  18     $pattern = new CairoSurfacePattern ($sur);
  19         $matrix = new CairoMatrix();
  20     $matrix->translate ( - $size / 2, - $size / 2);
  21     $pattern->set_matrix ( $matrix);
  22
  23     $con->set_source ($pattern);
  24
  25     /* Copy two rectangles from the upper-left quarter of the image to
  26      * the lower right.  It will work if we use $con->fill(), but the
  27      * $con->clip() $con->paint() combination fails because the clip
  28      * on the surface as a destination affects it as the source as
  29      * well.
  30      */
  31     $con->rectangle (
  32                      2 * $size / 4, 2 * $size / 4,
  33                      $size / 4,     $size / 4);
  34     $con->rectangle (
  35                      3 * $size / 4, 3 * $size / 4,
  36                      $size / 4,     $size / 4);
  37     $con->clip ();
  38     $con->paint ();
  39         $sur->write_to_png("self-copy-php.png");
  40
  41 ?>