#include <cairo.h>
#include <math.h>
#include <stdio.h>

int
main (int argc, char *argv[]) {
	cairo_surface_t *surface;
	cairo_t *cr;

	//char string[] = "Hello this is long text to be display at some angle";
	char string[] = "iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii";
	cairo_text_extents_t size;
	double fontsize = 10.0;

	printf("Cairo version: %s\n",cairo_version_string());

	surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 200, 200);
	cr = cairo_create (surface);

	cairo_set_antialias(cr, CAIRO_ANTIALIAS_GRAY);

	//white background
	cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 1);
	cairo_paint(cr);


	cairo_select_font_face (cr, "Serif", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
	cairo_set_font_size (cr, fontsize);


	//font options
	{
		cairo_font_options_t *font_options;
		font_options = cairo_font_options_create ();
		cairo_get_font_options (cr, font_options);

		cairo_font_options_set_hint_metrics (font_options, CAIRO_HINT_METRICS_OFF);
		cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_NONE);
		cairo_font_options_set_antialias(font_options, CAIRO_ANTIALIAS_GRAY);
		
		cairo_set_font_options (cr, font_options);
		cairo_font_options_destroy (font_options);
	}

	cairo_text_extents(cr, string, &size);

	{
		int angle = 330;
		
		//move to the center
		cairo_translate (cr, 100, 100);
		//rotate around text center
		cairo_rotate(cr, angle / 180.*3.1415926);
		//center the text
		cairo_translate(cr, -size.width/2, size.height/2);

		//line below the text
		if(1) {
			cairo_save(cr);

			cairo_move_to (cr, 0, 1.7);
			cairo_rel_line_to (cr, size.width, 0);

			cairo_set_source_rgba (cr, 0.0, 1.0, 0.0, 1); 
			cairo_set_line_width(cr, 0.3);
			cairo_stroke(cr);

			cairo_restore(cr);
		}
		
		//text
		cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 1); 
		cairo_show_text (cr, string);
	}


	cairo_surface_write_to_png (surface, "rotlabel2.png");
	cairo_destroy (cr);
	cairo_surface_destroy (surface);
	return 0;
}