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gdkdihedralprivate.h


products/Sources/formale Sprachen/C/Gnome/gdk/gdkdihedralprivate.h

/* GDK - The GIMP Drawing Kit * Copyright (C) 2024 Red Hat, Inc. * * 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, see . */ #pragma once #include G_BEGIN_DECLS /*< private > * GdkDihedral: * @GDK_DIHEDRAL_NORMAL: Identity, * equivalent to the CSS transform "none" * @GDK_DIHEDRAL_90: Clockwise rotation by 90°, * equivalent to the CSS transform "rotate(90deg)" * @GDK_DIHEDRAL_180: Clockwise rotation by 180°, * equivalent to the CSS transform "rotate(180deg)" * @GDK_DIHEDRAL_270: Clockwise rotation by 270°, * equivalent to the CSS transform "rotate(270deg)" * @GDK_DIHEDRAL_FLIPPED: Horizontal flip, * equivalent to the CSS transform "scale(-1, 1)" * @GDK_DIHEDRAL_FLIPPED_90: Clockwise 90° rotation, followed by a horizontal flip, * equivalent to the CSS transform "rotate(90deg) scale(-1, 1)" * @GDK_DIHEDRAL_FLIPPED_180: Clockwise 180° rotation, followed by a horizontal flip, * equivalent to the CSS transform "rotate(180deg) scale(-1, 1)" * @GDK_DIHEDRAL_FLIPPED_270: Clockwise 270° rotation, followed by a horizontal flip, * equivalent to the CSS transform "rotate(270deg) scale(-1, 1)" * * The transforms that make up the symmetry group of the square, * also known as D₄. * * Note that this enumeration is intentionally set up to encode the *inverses* * of the corresponding wl_output_transform values. E.g. `WL_OUTPUT_TRANSFORM_FLIPPED_90` * is defined as a horizontal flip, followed by a 90° counterclockwise rotation, which * is the inverse of @GDK_DIHEDRAL_FLIPPED_90. */ typedef enum { GDK_DIHEDRAL_NORMAL, GDK_DIHEDRAL_90, GDK_DIHEDRAL_180, GDK_DIHEDRAL_270, GDK_DIHEDRAL_FLIPPED, GDK_DIHEDRAL_FLIPPED_90, GDK_DIHEDRAL_FLIPPED_180, GDK_DIHEDRAL_FLIPPED_270, } GdkDihedral; void gdk_dihedral_get_mat2 (GdkDihedral transform, float *xx, float *xy, float *yx, float *yy); GdkDihedral gdk_dihedral_combine (GdkDihedral first, GdkDihedral second); GdkDihedral gdk_dihedral_invert (GdkDihedral self); gboolean gdk_dihedral_swaps_xy (GdkDihedral self); const char * gdk_dihedral_get_name (GdkDihedral self); G_END_DECLS

                                                                                                                                                                                                                                                                                                                                                                                                     

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