#include<cairo.h>
#include<cairo-pdf.h>

int main()
{
  // Create surface and draw
  cairo_surface_t *surface = cairo_recording_surface_create(CAIRO_CONTENT_COLOR_ALPHA,0);
  cairo_t *ctx = cairo_create(surface);
  //cairo_translate(ctx,1000,1000);

  cairo_rectangle(ctx, -300, -300, 600, 600);
  cairo_set_source_rgb(ctx, 0.5, 0.2, 0.8);
  cairo_fill(ctx);

  cairo_rectangle(ctx, 0.0, 0.0, 300, 300);
  cairo_set_source_rgb(ctx, 0.3, 0.6, 0.8);
  cairo_fill(ctx);

  // This rectangle doesn't show up in pdf output
  cairo_rectangle(ctx, -300, -300, 300, 300);
  cairo_set_source_rgb(ctx, 0.6, 0.9, 0.2);
  cairo_fill(ctx);

  cairo_destroy(ctx);

  // Get surface extents
  double x,y,w,h;
  cairo_recording_surface_ink_extents(surface,&x,&y,&w,&h);

  // PDF output
  cairo_surface_t *output = cairo_pdf_surface_create("block.pdf",w,h);
  ctx = cairo_create(output);
  cairo_set_source_surface(ctx,surface,-x,-y);
  cairo_paint(ctx);
  cairo_show_page(ctx);
  cairo_destroy(ctx);
  cairo_surface_flush(output);
  cairo_surface_destroy(output);

  // PNG output
  output = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,w,h);
  ctx = cairo_create(output);
  cairo_set_source_surface(ctx,surface,-x,-y);
  cairo_paint(ctx);
  cairo_surface_write_to_png(output,"block.png");
  cairo_destroy(ctx);
  cairo_surface_flush(output);
  cairo_surface_destroy(output);

  cairo_surface_destroy(surface);
  return 0;
}