forked from AuroraMiddleware/gtk
49d83820a2
This is a new object (well, boxed type, but I'm calling it object) for dealing with transform in a more constructive way than graphene_matrix_t by keeping track of how the transform was created. This way, reasoning about the transform becomes easier, and we can create better ways to print it or transition from one transform to another one. An example of this is that while a 0 degree and a 360degree rotation are both the identity matrix, doing a transition between the two would cause a rotation.
47 lines
1.8 KiB
C
47 lines
1.8 KiB
C
/*
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* Copyright © 2019 Benjamin Otte
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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 2.1 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 <http://www.gnu.org/licenses/>.
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*
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* Authors: Benjamin Otte <otte@gnome.org>
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*/
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#ifndef __GTK_TRANSFORM_PRIVATE_H__
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#define __GTK_TRANSFORM_PRIVATE_H__
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#include "gtktransform.h"
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#include <gsk/gsk.h>
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#include "gsk/gskrendernodeprivate.h"
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G_BEGIN_DECLS
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GskMatrixCategory gtk_transform_categorize (GtkTransform *self);
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gboolean gtk_transform_to_affine (GtkTransform *self,
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float *scale_x,
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float *scale_y,
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float *dx,
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float *dy) G_GNUC_WARN_UNUSED_RESULT;
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GtkTransform * gtk_transform_matrix_with_category (GtkTransform *next,
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const graphene_matrix_t*matrix,
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GskMatrixCategory category);
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G_END_DECLS
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#endif /* __GTK_TRANSFORM_PRIVATE_H__ */
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