kwin/plugins/platforms/drm/screens_drm.cpp
Martin Flöser 68698b4201 [libinput] Find screen for touch screen devices and calibrate accordingly
Summary:
This change finds the screen for a touch screen device based on:
 * number available screens
 * output name defined on the touch screen device
 * internal screen
 * and physical size

The id of the screen is stored in the Device allowing to adjust the
touch points accordingly. This means instead of transferring to the
combined display size the touch points are transferred into the output
space and the position of the output is added. Thus in a multi screen
system the touch points are properly mapped to the output.

Furthermore the screen orientation is passed to the Device and a
calibration matrix is set accordingly. Thus a transformed screen has the
touch screen transformed accordingly.

Please note that this only affects libinput on Wayland and not on X11!
The x11 standalone platform needs to gain similar code.

Reviewers: #kwin, #plasma

Subscribers: plasma-devel, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D8748
2017-12-23 10:18:55 +01:00

152 lines
4.2 KiB
C++

/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
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 "screens_drm.h"
#include "drm_backend.h"
#include "drm_output.h"
namespace KWin
{
DrmScreens::DrmScreens(DrmBackend *backend, QObject *parent)
: Screens(parent)
, m_backend(backend)
{
connect(backend, &DrmBackend::screensQueried, this, &DrmScreens::updateCount);
connect(backend, &DrmBackend::screensQueried, this, &DrmScreens::changed);
}
DrmScreens::~DrmScreens() = default;
void DrmScreens::init()
{
updateCount();
KWin::Screens::init();
emit changed();
}
QRect DrmScreens::geometry(int screen) const
{
const auto outputs = m_backend->enabledOutputs();
if (screen >= outputs.size()) {
return QRect();
}
return outputs.at(screen)->geometry();
}
qreal DrmScreens::scale(int screen) const
{
const auto outputs = m_backend->enabledOutputs();
if (screen >= outputs.size()) {
return 1;
}
return outputs.at(screen)->scale();
}
QSize DrmScreens::size(int screen) const
{
const auto outputs = m_backend->enabledOutputs();
if (screen >= outputs.size()) {
return QSize();
}
return outputs.at(screen)->geometry().size();
}
void DrmScreens::updateCount()
{
setCount(m_backend->enabledOutputs().size());
}
int DrmScreens::number(const QPoint &pos) const
{
int bestScreen = 0;
int minDistance = INT_MAX;
const auto outputs = m_backend->enabledOutputs();
for (int i = 0; i < outputs.size(); ++i) {
const QRect &geo = outputs.at(i)->geometry();
if (geo.contains(pos)) {
return i;
}
int distance = QPoint(geo.topLeft() - pos).manhattanLength();
distance = qMin(distance, QPoint(geo.topRight() - pos).manhattanLength());
distance = qMin(distance, QPoint(geo.bottomRight() - pos).manhattanLength());
distance = qMin(distance, QPoint(geo.bottomLeft() - pos).manhattanLength());
if (distance < minDistance) {
minDistance = distance;
bestScreen = i;
}
}
return bestScreen;
}
QString DrmScreens::name(int screen) const
{
const auto outputs = m_backend->enabledOutputs();
if (screen >= outputs.size()) {
return Screens::name(screen);
}
return outputs.at(screen)->name();
}
float DrmScreens::refreshRate(int screen) const
{
const auto outputs = m_backend->enabledOutputs();
if (screen >= outputs.size()) {
return Screens::refreshRate(screen);
}
return outputs.at(screen)->currentRefreshRate() / 1000.0f;
}
QSizeF DrmScreens::physicalSize(int screen) const
{
const auto outputs = m_backend->enabledOutputs();
if (screen >= outputs.size()) {
return Screens::physicalSize(screen);
}
return outputs.at(screen)->physicalSize();
}
bool DrmScreens::isInternal(int screen) const
{
const auto outputs = m_backend->enabledOutputs();
if (screen >= outputs.size()) {
return false;
}
return outputs.at(screen)->isInternal();
}
bool DrmScreens::supportsTransformations(int screen) const
{
const auto outputs = m_backend->enabledOutputs();
if (screen >= outputs.size()) {
return false;
}
return outputs.at(screen)->supportsTransformations();
}
Qt::ScreenOrientation DrmScreens::orientation(int screen) const
{
const auto outputs = m_backend->outputs();
if (screen >= outputs.size()) {
return Qt::PrimaryOrientation;
}
return outputs.at(screen)->orientation();
}
}