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 .

gdk_region_new ()

GdkRegion *
gdk_region_new (void);

Creates a new empty GdkRegion.

gdk_region_polygon ()

GdkRegion *
gdk_region_polygon (const GdkPoint *points,
                    gint n_points,
                    GdkFillRule fill_rule);

Creates a new GdkRegion using the polygon defined by a number of points.

gdk_region_copy ()

GdkRegion *
gdk_region_copy (const GdkRegion *region);

Copies region , creating an identical new region.

gdk_region_rectangle ()

GdkRegion *
gdk_region_rectangle (const GdkRectangle *rectangle);

Creates a new region containing the area rectangle .

gdk_region_destroy ()

void
gdk_region_destroy (GdkRegion *region);

Destroys a GdkRegion.

gdk_region_get_clipbox ()

void
gdk_region_get_clipbox (const GdkRegion *region,
                        GdkRectangle *rectangle);

Obtains the smallest rectangle which includes the entire GdkRegion.

gdk_region_get_rectangles ()

void
gdk_region_get_rectangles (const GdkRegion *region,
                           GdkRectangle **rectangles,
                           gint *n_rectangles);

Obtains the area covered by the region as a list of rectangles. The array returned in rectangles must be freed with g_free().

gdk_region_empty ()

gboolean
gdk_region_empty (const GdkRegion *region);

Finds out if the GdkRegion is empty.

gdk_region_equal ()

gboolean
gdk_region_equal (const GdkRegion *region1,
                  const GdkRegion *region2);

Finds out if the two regions are the same.

gdk_region_rect_equal ()

gboolean
gdk_region_rect_equal (const GdkRegion *region,
                       const GdkRectangle *rectangle);

Finds out if a regions is the same as a rectangle.

Since: 2.18

gdk_region_point_in ()

gboolean
gdk_region_point_in (const GdkRegion *region,
                     int x,
                     int y);

Finds out if a point is in a region.

gdk_region_rect_in ()

GdkOverlapType
gdk_region_rect_in (const GdkRegion *region,
                    const GdkRectangle *rectangle);

Tests whether a rectangle is within a region.

gdk_region_offset ()

void
gdk_region_offset (GdkRegion *region,
                   gint dx,
                   gint dy);

Moves a region the specified distance.

gdk_region_shrink ()

void
gdk_region_shrink (GdkRegion *region,
                   gint dx,
                   gint dy);

Resizes a region by the specified amount. Positive values shrink the region. Negative values expand it.

gdk_region_union_with_rect ()

void
gdk_region_union_with_rect (GdkRegion *region,
                            const GdkRectangle *rect);

Sets the area of region to the union of the areas of region and rect . The resulting area is the set of pixels contained in either region or rect .

gdk_region_intersect ()

void
gdk_region_intersect (GdkRegion *source1,
                      const GdkRegion *source2);

Sets the area of source1 to the intersection of the areas of source1 and source2 . The resulting area is the set of pixels contained in both source1 and source2 .

gdk_region_union ()

void
gdk_region_union (GdkRegion *source1,
                  const GdkRegion *source2);

Sets the area of source1 to the union of the areas of source1 and source2 . The resulting area is the set of pixels contained in either source1 or source2 .

gdk_region_subtract ()

void
gdk_region_subtract (GdkRegion *source1,
                     const GdkRegion *source2);

Subtracts the area of source2 from the area source1 . The resulting area is the set of pixels contained in source1 but not in source2 .

gdk_region_xor ()

void
gdk_region_xor (GdkRegion *source1,
                const GdkRegion *source2);

Sets the area of source1 to the exclusive-OR of the areas of source1 and source2 . The resulting area is the set of pixels contained in one or the other of the two sources but not in both.

GdkSpanFunc ()

void
(*GdkSpanFunc) (GdkSpan *span,
                gpointer data);

gdk_region_spans_intersect_foreach ()

void
gdk_region_spans_intersect_foreach (GdkRegion *region,
                                    const GdkSpan *spans,
                                    int n_spans,
                                    gboolean sorted,
                                    GdkSpanFunc function,
                                    gpointer data);

Calls a function on each span in the intersection of region and spans .

struct GdkPoint

struct GdkPoint {
  gint x;
  gint y;
};

struct GdkRectangle

struct GdkRectangle {
  gint x;
  gint y;
  gint width;
  gint height;
};

GdkRegion

typedef struct _GdkRegion GdkRegion;

enum GdkFillRule

enum GdkOverlapType

struct GdkSpan

struct GdkSpan {
  gint x;
  gint y;
  gint width;
};