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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWaylandCompositor module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qwlqttouch_p.h"
#include "qwaylandview.h"
#include <QTouchEvent>
#include <QWindow>
QT_BEGIN_NAMESPACE
namespace QtWayland {
static const int maxRawPos = 24;
TouchExtensionGlobal::TouchExtensionGlobal(QWaylandCompositor *compositor)
: QWaylandCompositorExtensionTemplate(compositor)
, QtWaylandServer::qt_touch_extension(compositor->display(), 1)
, m_compositor(compositor)
, m_posData(maxRawPos * 2)
{
}
TouchExtensionGlobal::~TouchExtensionGlobal()
{
}
static inline int toFixed(qreal f)
{
return int(f * 10000);
}
bool TouchExtensionGlobal::postTouchEvent(QTouchEvent *event, QWaylandSurface *surface)
{
const QList<QTouchEvent::TouchPoint> points = event->touchPoints();
const int pointCount = points.count();
if (!pointCount)
return false;
wl_client *surfaceClient = surface->client()->client();
uint32_t time = m_compositor->currentTimeMsecs();
const int rescount = m_resources.count();
for (int res = 0; res < rescount; ++res) {
Resource *target = m_resources.at(res);
if (target->client() != surfaceClient)
continue;
// We will use no touch_frame type of event, to reduce the number of
// events flowing through the wire. Instead, the number of points sent is
// included in the touch point events.
int sentPointCount = 0;
for (int i = 0; i < pointCount; ++i) {
if (points.at(i).state() != Qt::TouchPointStationary)
++sentPointCount;
}
for (int i = 0; i < pointCount; ++i) {
const QTouchEvent::TouchPoint &tp(points.at(i));
// Stationary points are never sent. They are cached on client side.
if (tp.state() == Qt::TouchPointStationary)
continue;
uint32_t id = tp.id();
uint32_t state = (tp.state() & 0xFFFF) | (sentPointCount << 16);
uint32_t flags = (tp.flags() & 0xFFFF) | (int(event->device()->capabilities()) << 16);
int x = toFixed(tp.pos().x());
int y = toFixed(tp.pos().y());
int nx = toFixed(tp.normalizedPos().x());
int ny = toFixed(tp.normalizedPos().y());
int w = toFixed(tp.rect().width());
int h = toFixed(tp.rect().height());
int vx = toFixed(tp.velocity().x());
int vy = toFixed(tp.velocity().y());
uint32_t pressure = uint32_t(tp.pressure() * 255);
QByteArray rawData;
QVector<QPointF> rawPosList = tp.rawScreenPositions();
int rawPosCount = rawPosList.count();
if (rawPosCount) {
rawPosCount = qMin(maxRawPos, rawPosCount);
QVector<float>::iterator iter = m_posData.begin();
for (int rpi = 0; rpi < rawPosCount; ++rpi) {
const QPointF &rawPos(rawPosList.at(rpi));
// This will stay in screen coordinates for performance
// reasons, clients using this data will presumably know
// what they are doing.
*iter++ = static_cast<float>(rawPos.x());
*iter++ = static_cast<float>(rawPos.y());
}
rawData = QByteArray::fromRawData(reinterpret_cast<const char*>(m_posData.constData()), sizeof(float) * rawPosCount * 2);
}
send_touch(target->handle,
time, id, state,
x, y, nx, ny, w, h,
pressure, vx, vy,
flags, rawData);
}
return true;
}
return false;
}
void TouchExtensionGlobal::setBehviorFlags(BehaviorFlags flags)
{
if (m_flags == flags)
return;
m_flags = flags;
behaviorFlagsChanged();
}
void TouchExtensionGlobal::touch_extension_bind_resource(Resource *resource)
{
m_resources.append(resource);
send_configure(resource->handle, m_flags);
}
void TouchExtensionGlobal::touch_extension_destroy_resource(Resource *resource)
{
m_resources.removeOne(resource);
}
}
QT_END_NAMESPACE
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