gimp/libgimp/gimpmatrix.h

76 lines
2.6 KiB
C

/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpmatrix.h
* Copyright (C) 1998 Jay Cox <jaycox@earthlink.net>
*
* 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__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef gdouble GimpMatrix3[3][3];
typedef gdouble GimpMatrix4[4][4];
void gimp_matrix3_transform_point (GimpMatrix3 matrix,
gdouble x,
gdouble y,
gdouble *newx,
gdouble *newy);
void gimp_matrix3_mult (GimpMatrix3 matrix1,
GimpMatrix3 matrix2);
void gimp_matrix3_identity (GimpMatrix3 matrix);
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);
gdouble gimp_matrix3_determinant (GimpMatrix3 matrix);
void gimp_matrix3_invert (GimpMatrix3 matrix,
GimpMatrix3 matrix_inv);
void gimp_matrix3_duplicate (GimpMatrix3 src,
GimpMatrix3 target);
gboolean gimp_matrix3_is_diagonal (GimpMatrix3 matrix);
gboolean gimp_matrix3_is_identity (GimpMatrix3 matrix);
gboolean gimp_matrix3_is_simple (GimpMatrix3 matrix);
void gimp_matrix4_to_deg (GimpMatrix4 matrix,
gdouble *a,
gdouble *b,
gdouble *c);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GIMP_MATRIX_H__ */