gdk_rectangle_intersect ()

gboolean
gdk_rectangle_intersect (const GdkRectangle *src1,
                         const GdkRectangle *src2,
                         GdkRectangle *dest);

Calculates the intersection of two rectangles. It is allowed for dest to be the same as either src1 or src2 . If the rectangles do not intersect, dest ’s width and height is set to 0 and its x and y values are undefined. If you are only interested in whether the rectangles intersect, but not in the intersecting area itself, pass NULL for dest .

gdk_rectangle_union ()

void
gdk_rectangle_union (const GdkRectangle *src1,
                     const GdkRectangle *src2,
                     GdkRectangle *dest);

Calculates the union of two rectangles. The union of rectangles src1 and src2 is the smallest rectangle which includes both src1 and src2 within it. It is allowed for dest to be the same as either src1 or src2 .

Note that this function does not ignore 'empty' rectangles (ie. with zero width or height).

gdk_rectangle_equal ()

gboolean
gdk_rectangle_equal (const GdkRectangle *rect1,
                     const GdkRectangle *rect2);

Checks if the two given rectangles are equal.

gdk_rectangle_contains_point ()

gboolean
gdk_rectangle_contains_point (const GdkRectangle *rect,
                              int x,
                              int y);

Returns TRUE if rect contains the point described by x and y .

GdkRectangle

typedef struct {
    int x, y;
    int width, height;
} GdkRectangle;

Defines the position and size of a rectangle. It is identical to cairo_rectangle_int_t.