/usr/include/gegl-0.2/gegl-utils.h is in libgegl-dev 0.2.0-7+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 | /* This file is part of GEGL
*
* GEGL is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* GEGL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with GEGL; if not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2003 Calvin Williamson
*/
#ifndef __GEGL_UTILS_H__
#define __GEGL_UTILS_H__
G_BEGIN_DECLS
/***
* GeglRectangle:
*
* GeglRectangles are used in #gegl_node_get_bounding_box and #gegl_node_blit
* for specifying rectangles.
*
* </p><pre>struct GeglRectangle
* {
* gint x;
* gint y;
* gint width;
* gint height;
* };</pre><p>
*
*/
/**
* gegl_rectangle_set:
* @rectangle: a #GeglRectangle
* @x: upper left x coordinate
* @y: upper left y coordinate
* @width: width in pixels.
* @height: height in pixels.
*
* Sets the @x, @y, @width and @height on @rectangle.
*/
void gegl_rectangle_set (GeglRectangle *rectangle,
gint x,
gint y,
guint width,
guint height);
/**
* gegl_rectangle_equal:
* @rectangle1: a #GeglRectangle
* @rectangle2: a #GeglRectangle
*
* Check if two #GeglRectangles are equal.
*
* Returns TRUE if @rectangle and @rectangle2 are equal.
*/
gboolean gegl_rectangle_equal (const GeglRectangle *rectangle1,
const GeglRectangle *rectangle2);
/**
* gegl_rectangle_equal_coords:
* @rectangle: a #GeglRectangle
* @x: X coordinate
* @y: Y coordinate
* @width: width of rectangle
* @height: height of rectangle
*
* Check if a rectangle is equal to a set of parameters.
*
* Returns TRUE if @rectangle and @x,@y @width x @height are equal.
*/
gboolean gegl_rectangle_equal_coords (const GeglRectangle *rectangle,
gint x,
gint y,
gint width,
gint height);
/**
* gegl_rectangle_is_empty:
* @rectangle: a #GeglRectangle
*
* Check if a rectangle has zero area.
*
* Returns TRUE if @rectangle height and width are both zero.
*/
gboolean gegl_rectangle_is_empty (const GeglRectangle *rectangle);
/**
* gegl_rectangle_copy:
* @destination: a #GeglRectangle
* @source: a #GeglRectangle
*
* Copies the rectangle information stored in @source over the information in
* @destination.
*/
void gegl_rectangle_copy (GeglRectangle *destination,
const GeglRectangle *source);
/**
* gegl_rectangle_bounding_box:
* @destination: a #GeglRectangle
* @source1: a #GeglRectangle
* @source2: a #GeglRectangle
*
* Computes the bounding box of the rectangles @source1 and @source2 and stores the
* resulting bounding box in @destination.
*/
void gegl_rectangle_bounding_box (GeglRectangle *destination,
const GeglRectangle *source1,
const GeglRectangle *source2);
/**
* gegl_rectangle_intersect:
* @dest: return location for the intersection of @src1 and @src2, or NULL.
* @src1: a #GeglRectangle
* @src2: a #GeglRectangle
*
* Calculates the intersection of two rectangles. It is allows for dest to be the same
* as either @src1 or @src2. If the rectangles do not intersect, dest's width and height
* are set to 0 and its x and y values are undefined.
*
* Returns TRUE if the rectangles intersect.
*/
gboolean gegl_rectangle_intersect (GeglRectangle *dest,
const GeglRectangle *src1,
const GeglRectangle *src2);
/**
* gegl_rectangle_contains:
* @parent: a #GeglRectangle
* @child: a #GeglRectangle
*
* Checks if the #GeglRectangle @child is fully contained within @parent.
*
* Returns TRUE if the @child is fully contained in @parent.
*/
gboolean gegl_rectangle_contains (const GeglRectangle *parent,
const GeglRectangle *child);
/**
* gegl_rectangle_infinite_plane:
*
* Returns a GeglRectangle that represents an infininte plane.
*/
GeglRectangle gegl_rectangle_infinite_plane (void);
/**
* gegl_rectangle_is_infinite_plane:
* @rectangle: A GeglRectangle.
*
* Returns TRUE if the GeglRectangle represents an infininte plane,
* FALSE otherwise.
*/
gboolean gegl_rectangle_is_infinite_plane (const GeglRectangle *rectangle);
/**
* gegl_rectangle_dump:
* @rectangle: A GeglRectangle.
*
* For debugging purposes, not stable API.
*/
void gegl_rectangle_dump (const GeglRectangle *rectangle);
/***
* Aligned memory:
*
* GEGL provides functions to allocate and free buffers that are guaranteed to
* be on 16 byte aligned memory addresses.
*/
/**
* gegl_malloc: (skip)
* @n_bytes: the number of bytes to allocte.
*
* Allocates @n_bytes of memory. If n_bytes is 0 it returns NULL.
*
* Returns a pointer to the allocated memory.
*/
gpointer gegl_malloc (gsize n_bytes);
/**
* gegl_free:
* @mem: the memory to free.
*
* Frees the memory pointed to by @mem, if @mem is NULL it will warn and abort.
*/
void gegl_free (gpointer mem);
#define GEGL_FLOAT_EPSILON (1e-5)
#define GEGL_FLOAT_IS_ZERO(value) (_gegl_float_epsilon_zero ((value)))
#define GEGL_FLOAT_EQUAL(v1, v2) (_gegl_float_epsilon_equal ((v1), (v2)))
#define INT_MULT(a,b,t) ((t) = (a) * (b) + 0x80, ((((t) >> 8) + (t)) >> 8))
/***
*/
inline gint _gegl_float_epsilon_zero (float value);
gint _gegl_float_epsilon_equal (float v1,
float v2);
G_END_DECLS
#endif /* __GEGL_UTILS_H__ */
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