#include <cairo.h>

void
draw_path(cairo_t* cr) {

  cairo_move_to(cr, 270, 450);
  cairo_line_to(cr, 250, 450);
  cairo_line_to(cr, 270, 50);
}

int
main (int argc, char *argv[])
{

  cairo_surface_t *surface =
    cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 500, 500);
  cairo_t *cr =
    cairo_create (surface);

  cairo_set_line_width(cr, 20);
  cairo_set_miter_limit(cr, 4);

  // the path unclipped, undashed
  draw_path(cr);
  cairo_set_source_rgb(cr, 0, 0, 1);
  cairo_stroke(cr);

  // clip rectangle
  cairo_move_to(cr, 110, 200);
  cairo_line_to(cr, 390, 200);
  cairo_line_to(cr, 390, 300);
  cairo_line_to(cr, 110, 300);
  cairo_close_path(cr);
  cairo_set_source_rgb(cr, .5, .5, .5);
  cairo_fill_preserve(cr);
  cairo_clip(cr);

  // the original path, clipped but undashed
  draw_path(cr);
  cairo_set_source_rgb(cr, 1, 0, 0);
  cairo_stroke(cr);

  // the original path, clipped and dashed (with a long dash) - this one fails,
  // it should overwrite the red with green
  double dashes[] = {20000.};
  cairo_set_dash(cr, dashes, 1, 0);
  draw_path(cr);
  cairo_set_source_rgb(cr, 0, 1, 0);
  cairo_stroke(cr);
  
  cairo_destroy (cr);
  cairo_surface_write_to_png(surface, "hello.png");
  cairo_surface_destroy (surface);
  return 0;
}