mutter/src/backends/meta-monitor-transform.h
Robert Mader df27017ba3 monitor-transform: Add helper to transform matrices
Moved from `MetaShapedTexture` - it will be useful
in several other places as well.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/344>
2022-08-05 20:30:50 +02:00

79 lines
2.9 KiB
C

/*
* Copyright (C) 2013 Red Hat Inc.
* Copyright (C) 2018 Robert Mader
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef META_MONITOR_TRANSFORM_H
#define META_MONITOR_TRANSFORM_H
#include <glib-object.h>
#include "backends/meta-backend-types.h"
#include "backends/meta-orientation-manager.h"
#include "core/util-private.h"
enum _MetaMonitorTransform
{
META_MONITOR_TRANSFORM_NORMAL,
META_MONITOR_TRANSFORM_90,
META_MONITOR_TRANSFORM_180,
META_MONITOR_TRANSFORM_270,
META_MONITOR_TRANSFORM_FLIPPED,
META_MONITOR_TRANSFORM_FLIPPED_90,
META_MONITOR_TRANSFORM_FLIPPED_180,
META_MONITOR_TRANSFORM_FLIPPED_270,
};
#define META_MONITOR_N_TRANSFORMS (META_MONITOR_TRANSFORM_FLIPPED_270 + 1)
#define META_MONITOR_ALL_TRANSFORMS ((1 << META_MONITOR_N_TRANSFORMS) - 1)
/* Returns true if transform causes width and height to be inverted
This is true for the odd transforms in the enum */
static inline gboolean
meta_monitor_transform_is_rotated (MetaMonitorTransform transform)
{
return (transform % 2);
}
/* Returns true if transform involves flipping */
static inline gboolean
meta_monitor_transform_is_flipped (MetaMonitorTransform transform)
{
return (transform >= META_MONITOR_TRANSFORM_FLIPPED);
}
META_EXPORT_TEST
MetaMonitorTransform meta_monitor_transform_from_orientation (MetaOrientation orientation);
META_EXPORT_TEST
MetaMonitorTransform meta_monitor_transform_invert (MetaMonitorTransform transform);
META_EXPORT_TEST
MetaMonitorTransform meta_monitor_transform_transform (MetaMonitorTransform transform,
MetaMonitorTransform other);
void meta_monitor_transform_transform_point (MetaMonitorTransform transform,
int area_width,
int area_height,
int x,
int y,
int *out_x,
int *out_y);
void meta_monitor_transform_transform_matrix (MetaMonitorTransform transform,
graphene_matrix_t *matrix);
#endif /* META_MONITOR_TRANSFORM_H */