343de21af5
Transforms a point in a rectangle with the origin (0, 0). To be used to transform cursor hotspots within a cursor sprite. https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1136
129 lines
4.0 KiB
C
129 lines
4.0 KiB
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;
|
|
}
|
|
|
|
/**
|
|
* meta_monitor_transform_relative_transform:
|
|
* @transform: The transform to start from
|
|
* @other: The transform to go to
|
|
*
|
|
* Return value: a transform to get from @transform to @other
|
|
*/
|
|
MetaMonitorTransform
|
|
meta_monitor_transform_relative_transform (MetaMonitorTransform transform,
|
|
MetaMonitorTransform other)
|
|
{
|
|
MetaMonitorTransform relative_transform;
|
|
|
|
relative_transform = ((other % META_MONITOR_TRANSFORM_FLIPPED -
|
|
transform % META_MONITOR_TRANSFORM_FLIPPED) %
|
|
META_MONITOR_TRANSFORM_FLIPPED);
|
|
|
|
if (meta_monitor_transform_is_flipped (transform) !=
|
|
meta_monitor_transform_is_flipped (other))
|
|
{
|
|
relative_transform = (meta_monitor_transform_invert (relative_transform) +
|
|
META_MONITOR_TRANSFORM_FLIPPED);
|
|
}
|
|
|
|
return relative_transform;
|
|
}
|
|
|
|
void
|
|
meta_monitor_transform_transform_point (MetaMonitorTransform transform,
|
|
int area_width,
|
|
int area_height,
|
|
int x,
|
|
int y,
|
|
int *out_x,
|
|
int *out_y)
|
|
{
|
|
switch (transform)
|
|
{
|
|
case META_MONITOR_TRANSFORM_NORMAL:
|
|
*out_x = x;
|
|
*out_y = y;
|
|
break;
|
|
case META_MONITOR_TRANSFORM_90:
|
|
*out_x = area_width - y;
|
|
*out_y = x;
|
|
break;
|
|
case META_MONITOR_TRANSFORM_180:
|
|
*out_x = area_width - x;
|
|
*out_y = area_height - y;
|
|
break;
|
|
case META_MONITOR_TRANSFORM_270:
|
|
*out_x = y,
|
|
*out_y = area_height - x;
|
|
break;
|
|
case META_MONITOR_TRANSFORM_FLIPPED:
|
|
*out_x = area_width - x;
|
|
*out_y = y;
|
|
break;
|
|
case META_MONITOR_TRANSFORM_FLIPPED_90:
|
|
*out_x = area_width - y;
|
|
*out_y = area_height - x;
|
|
break;
|
|
case META_MONITOR_TRANSFORM_FLIPPED_180:
|
|
*out_x = x;
|
|
*out_y = area_height - y;
|
|
break;
|
|
case META_MONITOR_TRANSFORM_FLIPPED_270:
|
|
*out_x = y;
|
|
*out_y = x;
|
|
break;
|
|
}
|
|
}
|