mirror of https://github.com/GNOME/gimp.git
163 lines
5.9 KiB
C
163 lines
5.9 KiB
C
/* LIBGIMP - The GIMP Library
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* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
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*
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* gimpmatrix.h
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* Copyright (C) 1998 Jay Cox <jaycox@gimp.org>
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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 3 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. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#ifndef __GIMP_MATRIX_H__
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#define __GIMP_MATRIX_H__
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G_BEGIN_DECLS
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/* For information look into the C source or the html documentation */
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/**
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* GimpMatrix2
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* @coeff: the coefficients
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*
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* A two by two matrix.
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**/
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struct _GimpMatrix2
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{
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gdouble coeff[2][2];
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};
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/**
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* GimpMatrix3
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* @coeff: the coefficients
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*
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* A three by three matrix.
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**/
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struct _GimpMatrix3
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{
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gdouble coeff[3][3];
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};
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/**
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* GimpMatrix4
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* @coeff: the coefficients
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*
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* A four by four matrix.
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**/
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struct _GimpMatrix4
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{
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gdouble coeff[4][4];
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};
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/*****************/
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/* GimpMatrix2 */
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/*****************/
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#define GIMP_TYPE_MATRIX2 (gimp_matrix2_get_type ())
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#define GIMP_VALUE_HOLDS_MATRIX2(value) (G_TYPE_CHECK_VALUE_TYPE ((value), GIMP_TYPE_MATRIX2))
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GType gimp_matrix2_get_type (void) G_GNUC_CONST;
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#define GIMP_TYPE_PARAM_MATRIX2 (gimp_param_matrix2_get_type ())
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#define GIMP_IS_PARAM_SPEC_MATRIX2(pspec) (G_TYPE_CHECK_INSTANCE_TYPE ((pspec), GIMP_TYPE_PARAM_MATRIX2))
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GType gimp_param_matrix2_get_type (void) G_GNUC_CONST;
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GParamSpec * gimp_param_spec_matrix2 (const gchar *name,
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const gchar *nick,
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const gchar *blurb,
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const GimpMatrix2 *default_value,
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GParamFlags flags);
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void gimp_matrix2_identity (GimpMatrix2 *matrix);
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void gimp_matrix2_mult (const GimpMatrix2 *matrix1,
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GimpMatrix2 *matrix2);
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/*****************/
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/* GimpMatrix3 */
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/*****************/
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#define GIMP_TYPE_MATRIX3 (gimp_matrix3_get_type ())
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#define GIMP_VALUE_HOLDS_MATRIX3(value) (G_TYPE_CHECK_VALUE_TYPE ((value), GIMP_TYPE_MATRIX3))
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GType gimp_matrix3_get_type (void) G_GNUC_CONST;
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#define GIMP_TYPE_PARAM_MATRIX3 (gimp_param_matrix3_get_type ())
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#define GIMP_IS_PARAM_SPEC_MATRIX3(pspec) (G_TYPE_CHECK_INSTANCE_TYPE ((pspec), GIMP_TYPE_PARAM_MATRIX3))
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GType gimp_param_matrix3_get_type (void) G_GNUC_CONST;
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GParamSpec * gimp_param_spec_matrix3 (const gchar *name,
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const gchar *nick,
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const gchar *blurb,
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const GimpMatrix3 *default_value,
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GParamFlags flags);
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void gimp_matrix3_identity (GimpMatrix3 *matrix);
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void gimp_matrix3_mult (const GimpMatrix3 *matrix1,
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GimpMatrix3 *matrix2);
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void gimp_matrix3_translate (GimpMatrix3 *matrix,
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gdouble x,
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gdouble y);
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void gimp_matrix3_scale (GimpMatrix3 *matrix,
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gdouble x,
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gdouble y);
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void gimp_matrix3_rotate (GimpMatrix3 *matrix,
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gdouble theta);
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void gimp_matrix3_xshear (GimpMatrix3 *matrix,
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gdouble amount);
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void gimp_matrix3_yshear (GimpMatrix3 *matrix,
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gdouble amount);
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void gimp_matrix3_affine (GimpMatrix3 *matrix,
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gdouble a,
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gdouble b,
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gdouble c,
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gdouble d,
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gdouble e,
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gdouble f);
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gdouble gimp_matrix3_determinant (const GimpMatrix3 *matrix);
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void gimp_matrix3_invert (GimpMatrix3 *matrix);
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gboolean gimp_matrix3_is_identity (const GimpMatrix3 *matrix);
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gboolean gimp_matrix3_is_diagonal (const GimpMatrix3 *matrix);
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gboolean gimp_matrix3_is_affine (const GimpMatrix3 *matrix);
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gboolean gimp_matrix3_is_simple (const GimpMatrix3 *matrix);
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void gimp_matrix3_transform_point (const GimpMatrix3 *matrix,
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gdouble x,
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gdouble y,
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gdouble *newx,
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gdouble *newy);
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/*****************/
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/* GimpMatrix4 */
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/*****************/
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void gimp_matrix4_to_deg (const GimpMatrix4 *matrix,
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gdouble *a,
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gdouble *b,
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gdouble *c);
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G_END_DECLS
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#endif /* __GIMP_MATRIX_H__ */
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