mutter-performance-source/src/backends/meta-monitor-transform.c

/*
 * 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 ();
  return 0;
}

MetaMonitorTransform
meta_monitor_transform_transform (MetaMonitorTransform transform,
                                  MetaMonitorTransform other)
{
  MetaMonitorTransform new_transform;

  new_transform = (transform + other) % META_MONITOR_TRANSFORM_FLIPPED;
  if (meta_monitor_transform_is_flipped (transform) !=
      meta_monitor_transform_is_flipped (other))
    new_transform += META_MONITOR_TRANSFORM_FLIPPED;

  return new_transform;
}