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monitor-transform: Add helper function transform_invert()

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It returns the inverted transform, which is always the same as the
input, besides for TRANSFORM_90 and TRANSFORM_270.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/366
This commit is contained in:
Robert Mader 2019-01-05 14:18:02 +01:00
parent 676a8da005
commit b7a9c7e7d3
4 changed files with 44 additions and 0 deletions
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1
src/Makefile.am
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@ -160,6 +160,7 @@ libmutter_@LIBMUTTER_API_VERSION@_la_SOURCES = \
backends/meta-monitor-manager-private.h \
backends/meta-monitor-manager-dummy.c \
backends/meta-monitor-manager-dummy.h \
backends/meta-monitor-transform.c \
backends/meta-monitor-transform.h \
backends/meta-orientation-manager.c \
backends/meta-orientation-manager.h \

40
src/backends/meta-monitor-transform.c Normal file
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@ -0,0 +1,40 @@
/*
* 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/>.
*/
#include "config.h"
#include "backends/meta-monitor-transform.h"
MetaMonitorTransform
meta_monitor_transform_invert (MetaMonitorTransform transform)
{
switch (transform)
{
case META_MONITOR_TRANSFORM_90:
return META_MONITOR_TRANSFORM_270;
case META_MONITOR_TRANSFORM_270:
return META_MONITOR_TRANSFORM_90;
case META_MONITOR_TRANSFORM_NORMAL:
case META_MONITOR_TRANSFORM_180:
case META_MONITOR_TRANSFORM_FLIPPED:
case META_MONITOR_TRANSFORM_FLIPPED_90:
case META_MONITOR_TRANSFORM_FLIPPED_180:
case META_MONITOR_TRANSFORM_FLIPPED_270:
return transform;
}
g_assert_not_reached ();
}

2
src/backends/meta-monitor-transform.h
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@ -50,4 +50,6 @@ meta_monitor_transform_is_flipped (MetaMonitorTransform transform)
return (transform >= META_MONITOR_TRANSFORM_FLIPPED);
}
MetaMonitorTransform meta_monitor_transform_invert (MetaMonitorTransform transform);
#endif /* META_MONITOR_TRANSFORM_H */

1
src/meson.build
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@ -202,6 +202,7 @@ mutter_sources = [
'backends/meta-monitor-manager-dummy.c',
'backends/meta-monitor-manager-dummy.h',
'backends/meta-monitor-manager-private.h',
'backends/meta-monitor-transform.c',
'backends/meta-monitor-transform.h',
'backends/meta-orientation-manager.c',
'backends/meta-orientation-manager.h',