forked from enlightenment/efl
545 lines
19 KiB
C
545 lines
19 KiB
C
/* EINA - EFL data type library
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* Copyright (C) 2007-2008 Jorge Luis Zapata Muga
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library;
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* if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef EINA_RECTANGLE_H_
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#define EINA_RECTANGLE_H_
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#include "eina_types.h"
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/**
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* @addtogroup Eina_Rectangle_Group Rectangle
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*
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* @brief These functions provide rectangle management.
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*/
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/**
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* @addtogroup Eina_Tools_Group Tools
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*
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* @{
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*/
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/**
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* @defgroup Eina_Rectangle_Group Rectangle
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*
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* @{
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*/
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#define EINA_RECTANGLE_INIT { 0, 0, 0, 0}
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#define EINA_RECTANGLE_FORMAT "dx%d - %dx%d"
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#define EINA_RECTANGLE_ARGS(r) (r)->x, (r)->y, (r)->w, (r)->h
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/**
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* @typedef Eina_Rectangle
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* Simple rectangle structure.
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*/
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typedef struct _Eina_Rectangle
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{
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int x; /**< top-left x coordinate of rectangle */
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int y; /**< top-left y coordinate of rectangle */
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int w; /**< width of rectangle */
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int h; /**< height of rectangle */
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} Eina_Rectangle;
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/**
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* @typedef Eina_Rectangle_Pool
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* Type for an opaque pool of rectangle.
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*/
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typedef struct _Eina_Rectangle_Pool Eina_Rectangle_Pool;
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/**
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* @typedef Eina_Rectangle_Packing
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* Type for an Eina Pool based on packing algorithm.
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* @since 1.11
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*/
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typedef enum {
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Eina_Packing_Descending, /**< Current */
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Eina_Packing_Ascending, /**< sorting in ascending order */
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Eina_Packing_Bottom_Left, /**< sorting in bottom left fashion */
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Eina_Packing_Bottom_Left_Skyline, /**< bottom left skyline */
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Eina_Packing_Bottom_Left_Skyline_Improved /**< optimized bottom left skyline */
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} Eina_Rectangle_Packing;
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/**
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* @typedef Eina_Rectangle_Outside
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* Enumeration gives the positions where a rectangle can be outside a other rectangle
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* @since 1.19
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*/
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typedef enum {
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EINA_RECTANGLE_OUTSIDE_TOP = 1,
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EINA_RECTANGLE_OUTSIDE_LEFT = 2,
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EINA_RECTANGLE_OUTSIDE_BOTTOM = 4,
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EINA_RECTANGLE_OUTSIDE_RIGHT = 8
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} Eina_Rectangle_Outside;
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/**
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* @brief Checks if the given spans intersect.
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*
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* @param c1 The column of the first span.
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* @param l1 The length of the first span.
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* @param c2 The column of the second span.
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* @param l2 The length of the second span.
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* @return #EINA_TRUE on success, #EINA_FALSE otherwise.
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*
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* This function returns #EINA_TRUE if the given spans intersect, #EINA_FALSE
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* otherwise.
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*/
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static inline int eina_spans_intersect(int c1, int l1, int c2, int l2) EINA_WARN_UNUSED_RESULT;
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/**
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* @brief Checks if the given rectangle is empty.
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*
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* @param r The rectangle to check.
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* @return #EINA_TRUE if the rectangle is empty, #EINA_FALSE otherwise.
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*
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* This function returns #EINA_TRUE if @p r is empty, #EINA_FALSE
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* otherwise. No check is done on @p r, so it must be a valid
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* rectangle.
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*/
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static inline Eina_Bool eina_rectangle_is_empty(const Eina_Rectangle *r) EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT;
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/**
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* @brief Sets the coordinates and size of the given rectangle.
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*
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* @param r The rectangle.
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* @param x The top-left x coordinate of the rectangle.
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* @param y The top-left y coordinate of the rectangle.
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* @param w The width of the rectangle.
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* @param h The height of the rectangle.
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*
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* This function sets its top-left x coordinate to @p x, its top-left
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* y coordinate to @p y, its width to @p w and its height to @p h. No
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* check is done on @p r, so it must be a valid rectangle.
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*/
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static inline void eina_rectangle_coords_from(Eina_Rectangle *r, int x, int y, int w, int h) EINA_ARG_NONNULL(1);
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/**
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* @brief Checks if the given rectangles intersect.
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*
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* @param r1 The first rectangle.
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* @param r2 The second rectangle.
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* @return #EINA_TRUE if the rectangles intersect, #EINA_FALSE otherwise.
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*
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* This function returns #EINA_TRUE if @p r1 and @p r2 intersect, #EINA_FALSE
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* otherwise. No check is done on @p r1 and @p r2, so they must be valid
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* rectangles.
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*/
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static inline Eina_Bool eina_rectangles_intersect(const Eina_Rectangle *r1, const Eina_Rectangle *r2) EINA_ARG_NONNULL(1, 2) EINA_WARN_UNUSED_RESULT;
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/**
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* @brief Checks if the given x-coordinate is in the rectangle .
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*
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* @param r The rectangle.
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* @param x The x coordinate.
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* @return #EINA_TRUE on success, #EINA_FALSE otherwise.
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*
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* This function returns #EINA_TRUE if @p x is in @p r with respect to
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* the horizontal direction, #EINA_FALSE otherwise. No check is done
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* on @p r, so it must be a valid rectangle.
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*/
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static inline Eina_Bool eina_rectangle_xcoord_inside(const Eina_Rectangle *r, int x) EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT;
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/**
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* @brief Checks if the given y-coordinate is in the rectangle .
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*
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* @param r The rectangle.
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* @param y The y coordinate.
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* @return #EINA_TRUE on success, #EINA_FALSE otherwise.
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*
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* This function returns #EINA_TRUE if @p y is in @p r with respect to
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* the vertical direction, #EINA_FALSE otherwise. No check is done
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* on @p r, so it must be a valid rectangle.
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*/
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static inline Eina_Bool eina_rectangle_ycoord_inside(const Eina_Rectangle *r, int y) EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT;
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/**
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* @brief Checks if the given point is in the rectangle .
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*
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* @param r The rectangle.
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* @param x The x coordinate of the point.
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* @param y The y coordinate of the point.
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* @return #EINA_TRUE on success, #EINA_FALSE otherwise.
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*
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* This function returns #EINA_TRUE if the point of coordinate (@p x,
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* @p y) is in @p r, #EINA_FALSE otherwise. No check is done on @p r,
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* so it must be a valid rectangle.
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*/
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static inline Eina_Bool eina_rectangle_coords_inside(const Eina_Rectangle *r, int x, int y) EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT;
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/**
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* @brief Gets the union of two rectangles.
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*
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* @param dst The first rectangle.
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* @param src The second rectangle.
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*
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* This function get the union of the rectangles @p dst and @p src. The
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* result is stored in @p dst. No check is done on @p dst or @p src,
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* so they must be valid rectangles.
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*/
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static inline void eina_rectangle_union(Eina_Rectangle *dst, const Eina_Rectangle *src) EINA_ARG_NONNULL(1, 2);
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/**
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* @brief Gets the intersection of two rectangles.
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*
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* @param dst The first rectangle.
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* @param src The second rectangle.
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* @return #EINA_TRUE if the rectangles intersect, #EINA_FALSE
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* otherwise.
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*
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* This function get the intersection of the rectangles @p dst and
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* @p src. The result is stored in @p dst. No check is done on @p dst
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* or @p src, so they must be valid rectangles.
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*/
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static inline Eina_Bool eina_rectangle_intersection(Eina_Rectangle *dst, const Eina_Rectangle *src) EINA_ARG_NONNULL(1, 2) EINA_WARN_UNUSED_RESULT;
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/**
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* @brief FIXME I am useless and used by no one
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*
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* @param in The inner rectangle.
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* @param out The outer rectangle.
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* @param res The resulting rectangle.
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*
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*/
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static inline void eina_rectangle_rescale_in(const Eina_Rectangle *out, const Eina_Rectangle *in, Eina_Rectangle *res) EINA_ARG_NONNULL(1, 2, 3);
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/**
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* @brief FIXME I am useless and used by no one
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*
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* @param in The inner rectangle.
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* @param out The outer rectangle.
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* @param res The resulting rectangle.
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*
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*/
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static inline void eina_rectangle_rescale_out(const Eina_Rectangle *out, const Eina_Rectangle *in, Eina_Rectangle *res) EINA_ARG_NONNULL(1, 2, 3);
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/**
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*
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* @brief Tells whether a rectangle is valid or not.
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*
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* @param r The rectangle
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* @return #EINA_TRUE if the rectangle is valid, #EINA_FALSE otherwise.
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*
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* This function checks if both width and height attributes of the rectangle are
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* positive integers. If so, the rectangle is considered valid, else the
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* rectangle is invalid.
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*/
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static inline Eina_Bool eina_rectangle_is_valid(const Eina_Rectangle *r) EINA_ARG_NONNULL(1);
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/**
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*
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* @brief Gives the rectangle maximum x coordinate.
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*
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* @param thiz The rectangle
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* @return The maximum x coordinate
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*
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* This function calculates the maximum x coordinate of the rectangle by summing
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* the @p width with the current @p x coordinate of the rectangle.
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*/
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static inline int eina_rectangle_max_x(Eina_Rectangle *thiz) EINA_ARG_NONNULL(1);
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/**
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*
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* @brief Gives the rectangle maximum y coordinate.
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*
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* @param thiz The rectangle
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* @return The maximum y coordinate
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*
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* This function calculates the maximum y coordinate of the rectangle by summing
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* the @p height with the current @p y coodinate of the rectangle.
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*/
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static inline int eina_rectangle_max_y(Eina_Rectangle *thiz) EINA_ARG_NONNULL(1);
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/**
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*
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* @brief Slices a rectangle vertically into two subrectangles starting from left edge.
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*
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* @param thiz The rectangle to slice
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* @param slice The sliced part of the rectangle
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* @param remainder The left over part of the original rectangle after slice
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* @param amount The x inner coordinate of the rectangle where to perform the
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* slicing.
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* @return #EINA_TRUE if the cut succeeds, #EINA_FALSE otherwise
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*
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* Use this function if we must cut a rectangle vertically. The @p amount
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* parameter defines the x inner coordinate where to do the cut, starting from
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* the left edge of the rectangle. If the @p amount value is greater than the
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* rectangle width, there will be not cut possible and #EINA_FALSE will be
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* returned.
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*/
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static inline Eina_Bool eina_rectangle_x_cut(Eina_Rectangle *thiz, Eina_Rectangle *slice, Eina_Rectangle *remainder, int amount) EINA_ARG_NONNULL(1);
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/**
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*
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* @brief Slices a rectangle horizontally into two subrectangles starting from bottom edge
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*
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* @param thiz The rectangle to slice
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* @param slice The sliced part of the rectangle
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* @param remainder The left over part of the original rectangle after slice
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* @param amount The y inner coordinate of the rectangle where to perform the
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* slicing.
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* @return #EINA_TRUE if the cut succeeds, #EINA_FALSE otherwise
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*
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* Use this function if we must cut a rectangle horizontally. The @p amount
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* parameter defines the y inner coordinate where to do the cut, starting from
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* the bottom edge of the rectangle. If the @p amount value is greater than the
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* rectangle width, there will be not cut possible and #EINA_FALSE will be
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* returned.
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*/
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static inline Eina_Bool eina_rectangle_y_cut(Eina_Rectangle *thiz, Eina_Rectangle *slice, Eina_Rectangle *remainder, int amount) EINA_ARG_NONNULL(1);
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/**
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*
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* @brief Slices a rectangle vertically starting from right edge
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*
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* @param thiz The rectangle to slice
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* @param slice The sliced part of the rectangle
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* @param remainder The left over part of the original rectangle after slice
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* @param amount The amount to cut off the rectangle starting from the right
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* edge
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* @return #EINA_TRUE if the cut succeeds, #EINA_FALSE otherwise
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*
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* Use this function if we must cut a rectangle vertically. The @p amount
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* parameter defines the inner x coordinate where to do the cut, starting from
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* the right edge of the rectangle. If the @p amount value is greater than the
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* rectangle width, there will be not cut possible and #EINA_FALSE will be
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* returned.
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*/
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static inline Eina_Bool eina_rectangle_width_cut(Eina_Rectangle *thiz, Eina_Rectangle *slice, Eina_Rectangle *remainder, int amount) EINA_ARG_NONNULL(1);
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/**
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*
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* @brief Slices a rectangle horizontally starting from top edge
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*
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* @param thiz The rectangle to slice
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* @param slice The sliced part of the rectangle
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* @param remainder The left over part of the original rectangle after slice
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* @param amount The amount to cut off the rectangle starting from the top edge
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* @return #EINA_TRUE if the cut succeeds, #EINA_FALSE otherwise
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*
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* Use this function if we must cut a rectangle horizontally. The @p amount
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* parameter defines the inner y coordinate where to do the cut, starting from
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* the top edge of the rectangle. If the @p amount value is greater than the
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* rectangle width, there will be not cut possible and #EINA_FALSE will be
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* returned.
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*/
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static inline Eina_Bool eina_rectangle_height_cut(Eina_Rectangle *thiz, Eina_Rectangle *slice, Eina_Rectangle *remainder, int amount) EINA_ARG_NONNULL(1);
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/**
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* @brief Subtracts two rectangles.
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*
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* @param thiz The minuend rectangle
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* @param other The subtrahend rectangle
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*
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* This function subtract two rectangles. The difference is stored on @p out
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* There will be at most four differences, use eina_rectangle_is_valid to
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* confirm the number of differences.
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*/
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static inline Eina_Bool eina_rectangle_subtract(Eina_Rectangle *thiz, Eina_Rectangle *other, Eina_Rectangle out[4]) EINA_ARG_NONNULL(1);
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/**
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* @brief Adds a rectangle in a new pool.
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*
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* @param w The width of the rectangle.
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* @param h The height of the rectangle.
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* @return A newly allocated pool on success, @c NULL otherwise.
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*
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* This function adds the rectangle of size (@p width, @p height) to a
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* new pool. If the pool can not be created, @c NULL is
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* returned. Otherwise the newly allocated pool is returned.
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*/
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EAPI Eina_Rectangle_Pool *eina_rectangle_pool_new(int w, int h) EINA_MALLOC EINA_WARN_UNUSED_RESULT;
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/**
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* @brief Returns the pool of the given rectangle.
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*
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* @param rect The rectangle.
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* @return The pool of the given rectangle.
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*
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* This function returns the pool in which @p rect is. If @p rect is
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* @c NULL, @c NULL is returned.
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*/
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EAPI Eina_Rectangle_Pool *eina_rectangle_pool_get(Eina_Rectangle *rect) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);
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/**
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* @brief Returns the width and height of the given pool.
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*
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* @param pool The pool.
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* @param w The returned width.
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* @param h The returned height.
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* @return #EINA_TRUE on success, #EINA_FALSE otherwise.
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*
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* This function returns the width and height of @p pool and store
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* them in respectively @p w and @p h if they are not @c NULL. If
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* @p pool is @c NULL, #EINA_FALSE is returned. Otherwise #EINA_TRUE is
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* returned.
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*/
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EAPI Eina_Bool eina_rectangle_pool_geometry_get(Eina_Rectangle_Pool *pool, int *w, int *h) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT;
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/**
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* @brief Gets the data from the given pool.
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*
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* @param pool The pool.
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* @return The returned data.
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*
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* This function gets the data from @p pool set by
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* eina_rectangle_pool_data_set(). If @p pool is @c NULL, this
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* function returns @c NULL.
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*/
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EAPI void *eina_rectangle_pool_data_get(Eina_Rectangle_Pool *pool) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);
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/**
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* @brief Sets the data to the given pool.
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*
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* @param pool The pool.
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* @param data The data to set.
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*
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* This function sets @p data to @p pool. If @p pool is @c NULL, this
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* function does nothing.
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*/
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EAPI void eina_rectangle_pool_data_set(Eina_Rectangle_Pool *pool, const void *data) EINA_ARG_NONNULL(1);
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/**
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* @brief Frees the given pool.
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*
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* @param pool The pool to free.
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*
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* This function frees the allocated data of @p pool. If @p pool is
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* @c NULL, this function returned immediately.
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*/
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EAPI void eina_rectangle_pool_free(Eina_Rectangle_Pool *pool) EINA_ARG_NONNULL(1);
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/**
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* @brief Returns the number of rectangles in the given pool.
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*
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* @param pool The pool.
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* @return The number of rectangles in the pool.
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*
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* This function returns the number of rectangles in @p pool.
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*/
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EAPI int eina_rectangle_pool_count(Eina_Rectangle_Pool *pool) EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT;
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/**
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* @brief Requests a rectangle of given size in the given pool.
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*
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* @param pool The pool.
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* @param w The width of the rectangle to request.
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* @param h The height of the rectangle to request.
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* @return The requested rectangle on success, @c NULL otherwise.
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*
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* This function retrieve from @p pool the rectangle of width @p w and
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* height @p h. If @p pool is @c NULL, or @p w or @p h are non-positive,
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* the function returns @c NULL. If @p w or @p h are greater than the
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* pool size, the function returns @c NULL. On success, the function
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* returns the rectangle which matches the size (@p w, @p h).
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* Otherwise it returns @c NULL.
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*/
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EAPI Eina_Rectangle *eina_rectangle_pool_request(Eina_Rectangle_Pool *pool, int w, int h) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);
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/**
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* @brief Removes the given rectangle from the pool.
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*
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* @param rect The rectangle to remove from the pool.
|
|
*
|
|
* This function removes @p rect from the pool. If @p rect is
|
|
* @c NULL, the function returns immediately. Otherwise it removes @p
|
|
* rect from the pool.
|
|
*/
|
|
EAPI void eina_rectangle_pool_release(Eina_Rectangle *rect) EINA_ARG_NONNULL(1);
|
|
|
|
/**
|
|
* @def EINA_RECTANGLE_SET
|
|
* @brief Definition for the macro to set the values of a #Eina_Rectangle.
|
|
*
|
|
* @param Rectangle The rectangle to set the values.
|
|
* @param X The X coordinate of the top left corner of the rectangle.
|
|
* @param Y The Y coordinate of the top left corner of the rectangle.
|
|
* @param W The width of the rectangle.
|
|
* @param H The height of the rectangle.
|
|
*
|
|
* This macro set the values of @p Rectangle. (@p X, @p Y) is the
|
|
* coordinates of the top left corner of @p Rectangle, @p W is its
|
|
* width and @p H is its height.
|
|
*/
|
|
#define EINA_RECTANGLE_SET(Rectangle, X, Y, W, H) \
|
|
{ \
|
|
(Rectangle)->x = X; \
|
|
(Rectangle)->y = Y; \
|
|
(Rectangle)->w = W; \
|
|
(Rectangle)->h = H; \
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Creates a new rectangle.
|
|
*
|
|
* @param x The X coordinate of the top left corner of the rectangle.
|
|
* @param y The Y coordinate of the top left corner of the rectangle.
|
|
* @param w The width of the rectangle.
|
|
* @param h The height of the rectangle.
|
|
* @return The new rectangle on success, @ NULL otherwise.
|
|
*
|
|
* This function creates a rectangle which top left corner has the
|
|
* coordinates (@p x, @p y), with height @p w and height @p h and adds
|
|
* it to the rectangles pool. No check is done on @p w and @p h. This
|
|
* function returns a new rectangle on success, @c NULL otherwise.
|
|
*/
|
|
EAPI Eina_Rectangle *eina_rectangle_new(int x, int y, int w, int h) EINA_MALLOC EINA_WARN_UNUSED_RESULT;
|
|
|
|
/**
|
|
* @brief Frees the given rectangle.
|
|
*
|
|
* @param rect The rectangle to free.
|
|
*
|
|
* This function removes @p rect from the rectangles pool.
|
|
*/
|
|
EAPI void eina_rectangle_free(Eina_Rectangle *rect) EINA_ARG_NONNULL(1);
|
|
|
|
/**
|
|
* @brief Sets the type of given rectangle pool.
|
|
*
|
|
* @param pool The rectangle pool for which type is to be set.
|
|
*
|
|
* This function sets @p type of @p pool.
|
|
* @see Eina_Rectangle_Packing
|
|
* @since 1.11
|
|
*/
|
|
EAPI void eina_rectangle_pool_packing_set(Eina_Rectangle_Pool *pool,Eina_Rectangle_Packing type) EINA_ARG_NONNULL(1);
|
|
|
|
/**
|
|
* @brief calculates where rect2 is outside of rect1.
|
|
*
|
|
* @param rect1 The rect to use as anchor
|
|
* @param rect2 The rect to look for outside positions
|
|
*
|
|
* @return A or'ed map of Eina_Rectangle_Outside values
|
|
* @since 1.19
|
|
*/
|
|
EAPI Eina_Rectangle_Outside eina_rectangle_outside_position(Eina_Rectangle *rect1, Eina_Rectangle *rect2);
|
|
|
|
#include "eina_inline_rectangle.x"
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif /*_EINA_RECTANGLE_H_*/
|