struct dimensions {
	int row_count;	/* rows */
	int column_count;	/* columns */
	double paper_width; 	/* paper width */
	double paper_height;	/* paper height */
	double month_width;	/* month width */
	double month_height;	/* month height */
   double month_top_corner_x;
   double month_top_corner_y;
	double day_width;	/* day box width */
	double day_height;	/* day box height */
	double margin;	/* margin */
   double header_width;
   double header_height;
};

int fill_bg(cairo_t *c);

struct RGB {
   double r;
   double g;
   double b;
};

struct month_info {
   int month_position;
   int first_day;
   int num_of_days;
   int minimum_rows;
};

struct RGB hex_to_rgb(char *str);

int set_color(cairo_t *c, char *hex);

int draw_text (cairo_t *c, double x, double y, char *font_family, int font_size, char *text);

int calculate_dimensions(double pw, double ph, struct dimensions *d);

int print_dimensions(struct dimensions *d);

int draw_month_grid (cairo_t *c, struct month_info *m, struct dimensions *d);

int draw_month (cairo_t *c, cairo_t *cd, cairo_surface_t *s, struct month_info *m, struct dimensions *d);

int day_of_week (int d, int m, int y);

int draw_month_title(cairo_t *c, struct dimensions *d, char *font_family, int font_size, char *name);

PangoRectangle get_logical_extents (cairo_t *c, char *font_family, int font_size, char *text);

int calculate_minimum_rows(struct month_info *m, struct dimensions *d);

int construct_day_box(cairo_t *cd, int month, int day, int week_day);