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- /* LIBGIMP - The GIMP Library
- * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
- *
- * gimpmatrix.h
- * Copyright (C) 1998 Jay Cox <jaycox@gimp.org>
- *
- * This library 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 2 of the License, or (at your option) any later version.
- *
- * This library 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 this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
- #ifndef __GIMP_MATRIX_H__
- #define __GIMP_MATRIX_H__
- G_BEGIN_DECLS
- /* For information look into the C source or the html documentation */
- struct _GimpMatrix2
- {
- gdouble coeff[2][2];
- };
- struct _GimpMatrix3
- {
- gdouble coeff[3][3];
- };
- struct _GimpMatrix4
- {
- gdouble coeff[4][4];
- };
- #define GIMP_TYPE_MATRIX2 (gimp_matrix2_get_type ())
- #define GIMP_VALUE_HOLDS_MATRIX2(value) (G_TYPE_CHECK_VALUE_TYPE ((value), GIMP_TYPE_MATRIX2))
- GType gimp_matrix2_get_type (void) G_GNUC_CONST;
- #define GIMP_TYPE_PARAM_MATRIX2 (gimp_param_matrix2_get_type ())
- #define GIMP_IS_PARAM_SPEC_MATRIX2(pspec) (G_TYPE_CHECK_INSTANCE_TYPE ((pspec), GIMP_TYPE_PARAM_MATRIX2))
- GType gimp_param_matrix2_get_type (void) G_GNUC_CONST;
- GParamSpec * gimp_param_spec_matrix2 (const gchar *name,
- const gchar *nick,
- const gchar *blurb,
- const GimpMatrix2 *default_value,
- GParamFlags flags);
- void gimp_matrix2_identity (GimpMatrix2 *matrix);
- void gimp_matrix2_mult (const GimpMatrix2 *matrix1,
- GimpMatrix2 *matrix2);
- void gimp_matrix3_identity (GimpMatrix3 *matrix);
- void gimp_matrix3_mult (const GimpMatrix3 *matrix1,
- GimpMatrix3 *matrix2);
- void gimp_matrix3_translate (GimpMatrix3 *matrix,
- gdouble x,
- gdouble y);
- void gimp_matrix3_scale (GimpMatrix3 *matrix,
- gdouble x,
- gdouble y);
- void gimp_matrix3_rotate (GimpMatrix3 *matrix,
- gdouble theta);
- void gimp_matrix3_xshear (GimpMatrix3 *matrix,
- gdouble amount);
- void gimp_matrix3_yshear (GimpMatrix3 *matrix,
- gdouble amount);
- void gimp_matrix3_affine (GimpMatrix3 *matrix,
- gdouble a,
- gdouble b,
- gdouble c,
- gdouble d,
- gdouble e,
- gdouble f);
- gdouble gimp_matrix3_determinant (const GimpMatrix3 *matrix);
- void gimp_matrix3_invert (GimpMatrix3 *matrix);
- gboolean gimp_matrix3_is_identity (const GimpMatrix3 *matrix);
- gboolean gimp_matrix3_is_diagonal (const GimpMatrix3 *matrix);
- gboolean gimp_matrix3_is_affine (const GimpMatrix3 *matrix);
- gboolean gimp_matrix3_is_simple (const GimpMatrix3 *matrix);
- void gimp_matrix3_transform_point (const GimpMatrix3 *matrix,
- gdouble x,
- gdouble y,
- gdouble *newx,
- gdouble *newy);
- void gimp_matrix4_to_deg (const GimpMatrix4 *matrix,
- gdouble *a,
- gdouble *b,
- gdouble *c);
- G_END_DECLS
- #endif /* __GIMP_MATRIX_H__ */
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