#include <stdio.h>
#include <stdlib.h>
#include <cairo/cairo.h>

int main(void)
{
	int i, width = 300, height = 200;
	cairo_surface_t *surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, width, height);
	cairo_t *context = cairo_create(surface);
	cairo_font_extents_t font_extents;
	cairo_text_extents_t text_extents;
	cairo_rectangle_int_t rect_whole = {0, 0, width, height};
	cairo_rectangle_int_t rect_inside = {10, 50, width - 20, height - 100};
	const char *text = "Ala ma kota i dużego psa";
	cairo_region_t *region;

	cairo_set_source_rgb(context, 1.0, 1.0, 1.0);
	cairo_paint(context);

	cairo_set_source_rgba(context, 1.0, 0.0, 0.0, 0.5);
	cairo_rectangle(context, rect_inside.x, rect_inside.y, rect_inside.width, rect_inside.height);
	cairo_fill(context);

	cairo_select_font_face(context, "Sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
	cairo_set_font_size(context, 18);
	cairo_font_extents(context, &font_extents);
	cairo_text_extents(context, text, &text_extents);

	region = cairo_region_create_rectangle(&rect_whole);
	cairo_region_subtract_rectangle(region, &rect_inside);

	for (i = 0; i < cairo_region_num_rectangles(region); i++) {
		cairo_rectangle_int_t rectangle;
		cairo_region_get_rectangle(region, i, &rectangle);
		cairo_rectangle(context, rectangle.x, rectangle.y, rectangle.width, rectangle.height);
	}
	cairo_clip(context);

	for (i = 0; i < (height - font_extents.height) / font_extents.height; i++) {
		cairo_move_to(context,
				(width - text_extents.width) / 2 + text_extents.x_bearing,
				font_extents.ascent + i * font_extents.height);
		cairo_set_source_rgb(context, 0.0, 0.0, 0.0);
		cairo_show_text(context, text);
	}

	cairo_surface_write_to_png(surface, "image.png");
	cairo_region_destroy(region);
	cairo_destroy(context);
	cairo_surface_destroy(surface);
	return EXIT_SUCCESS;
}