/usr/include/gegl-0.3/gegl-matrix.h is in libgegl-dev 0.3.4-1ubuntu2.
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 | #ifndef __GEGL_MATRIX_H__
#define __GEGL_MATRIX_H__
#include <glib.h>
#include <glib-object.h>
G_BEGIN_DECLS
/* Currenly only used internally.
* Note: If making use of this in public API, add a boxed type for introspection
*/
typedef struct {
gdouble coeff[2][2];
} GeglMatrix2;
/***
* GeglMatrix3:
*
* #GeglMatrix3 is a 3x3 matrix for GEGL.
* Matrixes are currently used by #GeglPath and the affine operations,
* they might be used more centrally in the core of GEGL later.
*
*/
typedef struct {
gdouble coeff[3][3];
} GeglMatrix3;
#define GEGL_TYPE_MATRIX3 (gegl_matrix3_get_type ())
#define GEGL_VALUE_HOLDS_MATRIX3(value) (G_TYPE_CHECK_VALUE_TYPE ((value), GEGL_TYPE_MATRIX3))
/**
* gegl_matrix3_get_type:
*
* Returns: the #GType for GeglMatrix3 objects
*
**/
GType gegl_matrix3_get_type (void) G_GNUC_CONST;
/**
* gegl_matrix3_new:
*
* Return: A newly allocated #GeglMatrix3
*/
GeglMatrix3 * gegl_matrix3_new (void);
/**
* gegl_matrix3_identity:
* @matrix: a #GeglMatrix
*
* Set the provided @matrix to the identity matrix.
*/
void gegl_matrix3_identity (GeglMatrix3 *matrix);
/**
* gegl_matrix3_equal:
* @matrix1: a #GeglMatrix
* @matrix2: a #GeglMatrix
*
* Check if two matrices are equal.
*
* Returns TRUE if the matrices are equal.
*/
gboolean gegl_matrix3_equal (GeglMatrix3 *matrix1,
GeglMatrix3 *matrix2);
/**
* gegl_matrix3_is_identity:
* @matrix: a #GeglMatrix
*
* Check if a matrix is the identity matrix.
*
* Returns TRUE if the matrix is the identity matrix.
*/
gboolean gegl_matrix3_is_identity (GeglMatrix3 *matrix);
/**
* gegl_matrix3_is_scale:
* @matrix: a #GeglMatrix
*
* Check if a matrix only does scaling.
*
* Returns TRUE if the matrix only does scaling.
*/
gboolean gegl_matrix3_is_scale (GeglMatrix3 *matrix);
/**
* gegl_matrix3_is_translate:
* @matrix: a #GeglMatrix
*
* Check if a matrix only does translation.
*
* Returns TRUE if the matrix only does trasnlation.
*/
gboolean gegl_matrix3_is_translate (GeglMatrix3 *matrix);
/**
* gegl_matrix3_copy_into:
* @dst: a #GeglMatrix
* @src: a #GeglMatrix
*
* Copies the matrix in @src into @dst.
*/
void gegl_matrix3_copy_into (GeglMatrix3 *dst,
GeglMatrix3 *src);
/**
* gegl_matrix3_copy:
* @matrix: a #GeglMatrix
*
* Returns a copy of @src.
*/
GeglMatrix3 * gegl_matrix3_copy (GeglMatrix3 *matrix);
/**
* gegl_matrix3_determinant:
* @matrix: a #GeglMatrix
*
* Returns the determinant for the matrix.
*/
gdouble gegl_matrix3_determinant (GeglMatrix3 *matrix);
/**
* gegl_matrix3_invert:
* @matrix: a #GeglMatrix
*
* Inverts @matrix.
*/
void gegl_matrix3_invert (GeglMatrix3 *matrix);
/**
* gegl_matrix3_multiply:
* @left: a #GeglMatrix
* @right: a #GeglMatrix
* @product: a #GeglMatrix to store the result in.
*
* Multiples @product = @left ยท @right
*/
void gegl_matrix3_multiply (GeglMatrix3 *left,
GeglMatrix3 *right,
GeglMatrix3 *product);
/**
* gegl_matrix3_originate:
* @matrix: a #GeglMatrix
* @x: x coordinate of new origin
* @y: y coordinate of new origin.
*
* Hmm not quite sure what this does.
*
*/
void gegl_matrix3_originate (GeglMatrix3 *matrix,
gdouble x,
gdouble y);
/**
* gegl_matrix3_transform_point:
* @matrix: a #GeglMatrix
* @x: pointer to an x coordinate
* @y: pointer to an y coordinate
*
* transforms the coordinates provided in @x and @y and changes to the
* coordinates gotten when the transformed with the matrix.
*
*/
void gegl_matrix3_transform_point (GeglMatrix3 *matrix,
gdouble *x,
gdouble *y);
/**
* gegl_matrix3_parse_string:
* @matrix: a #GeglMatrix
* @string: a string describing the matrix (right now a small subset of the
* transform strings allowed by SVG)
*
* Parse a transofmation matrix from a string.
*/
void gegl_matrix3_parse_string (GeglMatrix3 *matrix,
const gchar *string);
/**
* gegl_matrix3_to_string:
* @matrix: a #GeglMatrix
*
* Serialize a #GeglMatrix to a string.
*
* Returns a freshly allocated string representing that #GeglMatrix, the
* returned string should be g_free()'d.
*
*/
gchar * gegl_matrix3_to_string (GeglMatrix3 *matrix);
/***
*/
G_END_DECLS
#endif
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