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base-types: Add zero point and rect
A constant ClutterPoint for (0, 0) and a constant degenerate ClutterRect can be useful as guards for pointers, freeing the NULL value to mean "unset".
This commit is contained in:
Emmanuele Bassi
parent
24495918bb
commit
17539bca95
@ -377,6 +377,26 @@ G_DEFINE_BOXED_TYPE (ClutterMargin, clutter_margin,
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* ClutterPoint
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*/
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static const ClutterPoint _clutter_point_zero = CLUTTER_POINT_INIT_ZERO;
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/**
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* clutter_point_zero:
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*
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* A point centered at (0, 0).
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*
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* The returned value can be used as a guard.
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*
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* Return value: a point centered in (0, 0); the returned #ClutterPoint
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* is owned by Clutter and it should not be modified or freed.
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*
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* Since: 1.12
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*/
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const ClutterPoint *
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clutter_point_zero (void)
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{
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return &_clutter_point_zero;
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}
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/**
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* clutter_point_alloc:
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*
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@ -672,6 +692,8 @@ G_DEFINE_BOXED_TYPE_WITH_CODE (ClutterSize, clutter_size,
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* ClutterRect
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*/
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static const ClutterRect _clutter_rect_zero = CLUTTER_RECT_INIT_ZERO;
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static gboolean clutter_rect_progress (const GValue *a,
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const GValue *b,
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gdouble progress,
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@ -705,6 +727,26 @@ clutter_rect_normalize_internal (ClutterRect *rect)
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}
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}
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/**
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* clutter_rect_zero:
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*
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* A #ClutterRect with #ClutterRect.origin set at (0, 0) and a size
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* of 0.
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*
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* The returned value can be used as a guard.
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*
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* Return value: a rectangle with origin in (0, 0) and a size of 0.
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* The returned #ClutterRect is owned by Clutter and it should not
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* be modified or freed.
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*
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* Since: 1.12
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*/
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const ClutterRect *
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clutter_rect_zero (void)
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{
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return &_clutter_rect_zero;
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}
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/**
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* clutter_rect_alloc:
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*
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@ -162,23 +162,25 @@ CLUTTER_AVAILABLE_IN_1_12
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GType clutter_point_get_type (void) G_GNUC_CONST;
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CLUTTER_AVAILABLE_IN_1_12
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ClutterPoint * clutter_point_alloc (void);
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const ClutterPoint * clutter_point_zero (void);
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CLUTTER_AVAILABLE_IN_1_12
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ClutterPoint * clutter_point_init (ClutterPoint *point,
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float x,
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float y);
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ClutterPoint * clutter_point_alloc (void);
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CLUTTER_AVAILABLE_IN_1_12
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ClutterPoint * clutter_point_copy (const ClutterPoint *point);
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ClutterPoint * clutter_point_init (ClutterPoint *point,
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float x,
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float y);
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CLUTTER_AVAILABLE_IN_1_12
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void clutter_point_free (ClutterPoint *point);
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ClutterPoint * clutter_point_copy (const ClutterPoint *point);
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CLUTTER_AVAILABLE_IN_1_12
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gboolean clutter_point_equals (const ClutterPoint *a,
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const ClutterPoint *b);
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void clutter_point_free (ClutterPoint *point);
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CLUTTER_AVAILABLE_IN_1_12
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float clutter_point_distance (const ClutterPoint *a,
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const ClutterPoint *b,
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float *x_distance,
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float *y_distance);
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gboolean clutter_point_equals (const ClutterPoint *a,
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const ClutterPoint *b);
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CLUTTER_AVAILABLE_IN_1_12
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float clutter_point_distance (const ClutterPoint *a,
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const ClutterPoint *b,
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float *x_distance,
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float *y_distance);
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/**
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* ClutterSize:
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@ -295,58 +297,60 @@ CLUTTER_AVAILABLE_IN_1_12
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GType clutter_rect_get_type (void) G_GNUC_CONST;
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CLUTTER_AVAILABLE_IN_1_12
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ClutterRect * clutter_rect_alloc (void);
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const ClutterRect * clutter_rect_zero (void);
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CLUTTER_AVAILABLE_IN_1_12
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ClutterRect * clutter_rect_init (ClutterRect *rect,
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float x,
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float y,
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float width,
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float height);
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ClutterRect * clutter_rect_alloc (void);
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CLUTTER_AVAILABLE_IN_1_12
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ClutterRect * clutter_rect_copy (const ClutterRect *rect);
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ClutterRect * clutter_rect_init (ClutterRect *rect,
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float x,
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float y,
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float width,
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float height);
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CLUTTER_AVAILABLE_IN_1_12
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void clutter_rect_free (ClutterRect *rect);
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ClutterRect * clutter_rect_copy (const ClutterRect *rect);
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CLUTTER_AVAILABLE_IN_1_12
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gboolean clutter_rect_equals (ClutterRect *a,
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ClutterRect *b);
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void clutter_rect_free (ClutterRect *rect);
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CLUTTER_AVAILABLE_IN_1_12
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gboolean clutter_rect_equals (ClutterRect *a,
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ClutterRect *b);
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CLUTTER_AVAILABLE_IN_1_12
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ClutterRect * clutter_rect_normalize (ClutterRect *rect);
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ClutterRect * clutter_rect_normalize (ClutterRect *rect);
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CLUTTER_AVAILABLE_IN_1_12
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void clutter_rect_get_center (ClutterRect *rect,
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ClutterPoint *center);
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void clutter_rect_get_center (ClutterRect *rect,
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ClutterPoint *center);
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CLUTTER_AVAILABLE_IN_1_12
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gboolean clutter_rect_contains_point (ClutterRect *rect,
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ClutterPoint *point);
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gboolean clutter_rect_contains_point (ClutterRect *rect,
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ClutterPoint *point);
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CLUTTER_AVAILABLE_IN_1_12
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gboolean clutter_rect_contains_rect (ClutterRect *a,
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ClutterRect *b);
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gboolean clutter_rect_contains_rect (ClutterRect *a,
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ClutterRect *b);
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CLUTTER_AVAILABLE_IN_1_12
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void clutter_rect_union (ClutterRect *a,
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ClutterRect *b,
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ClutterRect *res);
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void clutter_rect_union (ClutterRect *a,
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ClutterRect *b,
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ClutterRect *res);
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CLUTTER_AVAILABLE_IN_1_12
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gboolean clutter_rect_intersection (ClutterRect *a,
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ClutterRect *b,
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ClutterRect *res);
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gboolean clutter_rect_intersection (ClutterRect *a,
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ClutterRect *b,
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ClutterRect *res);
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CLUTTER_AVAILABLE_IN_1_12
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void clutter_rect_offset (ClutterRect *rect,
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float d_x,
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float d_y);
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void clutter_rect_offset (ClutterRect *rect,
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float d_x,
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float d_y);
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CLUTTER_AVAILABLE_IN_1_12
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void clutter_rect_inset (ClutterRect *rect,
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float d_x,
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float d_y);
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void clutter_rect_inset (ClutterRect *rect,
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float d_x,
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float d_y);
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CLUTTER_AVAILABLE_IN_1_12
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void clutter_rect_clamp_to_pixel (ClutterRect *rect);
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void clutter_rect_clamp_to_pixel (ClutterRect *rect);
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CLUTTER_AVAILABLE_IN_1_12
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float clutter_rect_get_x (ClutterRect *rect);
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float clutter_rect_get_x (ClutterRect *rect);
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CLUTTER_AVAILABLE_IN_1_12
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float clutter_rect_get_y (ClutterRect *rect);
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float clutter_rect_get_y (ClutterRect *rect);
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CLUTTER_AVAILABLE_IN_1_12
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float clutter_rect_get_width (ClutterRect *rect);
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float clutter_rect_get_width (ClutterRect *rect);
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CLUTTER_AVAILABLE_IN_1_12
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float clutter_rect_get_height (ClutterRect *rect);
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float clutter_rect_get_height (ClutterRect *rect);
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/**
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* ClutterVertex:
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@ -1044,6 +1044,7 @@ clutter_point_equals
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clutter_point_free
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clutter_point_get_type
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clutter_point_init
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clutter_point_zero
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clutter_profile_flags DATA
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clutter_property_transition_get_property_name
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clutter_property_transition_get_type
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@ -1068,6 +1069,7 @@ clutter_rect_intersection
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clutter_rect_normalize
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clutter_rect_offset
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clutter_rect_union
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clutter_rect_zero
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clutter_rectangle_get_border_color
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clutter_rectangle_get_border_width
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clutter_rectangle_get_color
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@ -3187,6 +3187,7 @@ ClutterPaintVolume
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<SUBSECTION>
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CLUTTER_POINT_INIT
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CLUTTER_POINT_INIT_ZERO
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clutter_point_zero
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clutter_point_alloc
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clutter_point_init
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clutter_point_copy
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@ -3206,6 +3207,7 @@ clutter_size_equals
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<SUBSECTION>
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CLUTTER_RECT_INIT
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CLUTTER_RECT_INIT_ZERO
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clutter_rect_zero
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clutter_rect_alloc
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clutter_rect_init
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clutter_rect_copy
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