testcases/phpCairo/rotate-image-surface-paint.php

   1 <?
   2         $size = 20;
   3         $pad = 2;
   4         $surface_size = sqrt(($size - 2*$pad)*($size-2*$pad)/2);
   5         $sur = new CairoImageSurface(FORMAT_ARGB32, $size, $size);
   6     $con = new CairoContext($sur);
   7         $s = new CairoImageSurface(FORMAT_RGB24,
   8                                           $surface_size, $surface_size);
   9     $con2 = new CairoContext($s);
  10     $con2->set_source_rgb ( 1, 1, 1);
  11     $con2->rectangle (
  12                      0, 0,
  13                      $surface_size / 2, $surface_size / 2);
  14     $con2->fill ();
  15     $con2->set_source_rgb ( 1, 0, 0);
  16     $con2->rectangle (
  17                      $surface_size / 2, 0,
  18                      $surface_size / 2, $surface_size / 2);
  19     $con2->fill ();
  20     $con2->set_source_rgb ( 0, 1, 0);
  21     $con2->rectangle (
  22                      0, $surface_size / 2,
  23                      $surface_size / 2, $surface_size / 2);
  24     $con2->fill ();
  25     $con2->set_source_rgb ( 0, 0, 1);
  26     $con2->rectangle (
  27                      $surface_size / 2, $surface_size / 2,
  28                      $surface_size / 2, $surface_size / 2);
  29     $con2->fill ();
  30
  31
  32     /* First paint opaque background (black) so we don't need separate
  33      * ARGB32 and RGB24 reference images. */
  34     $con->set_source_rgb ( 0, 0, 0); /* black */
  35     $con->paint ();
  36
  37     $con->translate( $size/2, $size/2);
  38     $con->rotate ( M_PI / 4.0);
  39     $con->translate ( -$surface_size/2, -$surface_size/2);
  40
  41     $con->set_source_surface ( $s, 0, 0);
  42     $pat = $con->get_source();
  43
  44         $pat->set_filter(FILTER_NEAREST);
  45     $con->set_source($pat);
  46         $con->paint ();
  47         $sur->write_to_png("rotate-image-surface-paint-php.png");
  48
  49
  50 ?>