gistfile1.h

#include <math.h>
#include <pango/pangocairo.h>

#define FONT "Sans"

static void
draw_text (cairo_t *cr)
{

  PangoLayout *layout;
  PangoFontDescription *desc;
  int i, width, height;

  /* Create a PangoLayout, set the font and text */
  layout = pango_cairo_create_layout (cr);

  pango_layout_set_text (layout, "第", -1);
  desc = pango_font_description_from_string (FONT);

  cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);

  cairo_save (cr);
  for (i = 1; i <= 40; i++) {
    cairo_save (cr);

    pango_font_description_set_size (desc, i * PANGO_SCALE / 2);
    pango_layout_set_font_description (layout, desc);
    pango_cairo_update_layout (cr, layout);
    pango_layout_get_size (layout, &width, &height);
    pango_cairo_show_layout (cr, layout);

    cairo_restore (cr);
    cairo_translate (cr, 0, height / PANGO_SCALE);
  }
  cairo_restore (cr);
  pango_font_description_free (desc);

  cairo_rectangle(cr, 0, 0, 800, 800);
  cairo_stroke (cr);

  /* free the layout object */
  g_object_unref (layout);
}

int main (int argc, char **argv)
{
  cairo_t *cr;
  char *filename;
  cairo_status_t status;
  cairo_surface_t *surface;

  if (argc != 2)
    {
      g_printerr ("Usage: cairosimple OUTPUT_FILENAME\n");
      return 1;
    }

  filename = argv[1];

  surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
          800, 800);
  cr = cairo_create (surface);

  cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
  cairo_paint (cr);
  draw_text (cr);
  cairo_destroy (cr);

  status = cairo_surface_write_to_png (surface, filename);
  cairo_surface_destroy (surface);

  if (status != CAIRO_STATUS_SUCCESS)
    {
      g_printerr ("Could not save png to '%s'\n", filename);
      return 1;
    }

  return 0;
}