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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Compositor.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qwltouch_p.h"
#include "qwlsurface_p.h"
#include <QTouchEvent>
#include <QWindow>
QT_BEGIN_NAMESPACE
namespace QtWayland {
static void dummy(wl_client *, wl_resource *)
{
}
const struct qt_touch_extension_interface TouchExtensionGlobal::touch_interface = {
dummy
};
static const int maxRawPos = 24;
TouchExtensionGlobal::TouchExtensionGlobal(Compositor *compositor)
: m_compositor(compositor),
m_flags(0)
{
wl_array_init(&m_rawdata_array);
m_rawdata_ptr = static_cast<float *>(wl_array_add(&m_rawdata_array, maxRawPos * sizeof(float) * 2));
wl_display_add_global(compositor->wl_display(),
&qt_touch_extension_interface,
this,
TouchExtensionGlobal::bind_func);
}
TouchExtensionGlobal::~TouchExtensionGlobal()
{
wl_array_release(&m_rawdata_array);
}
void TouchExtensionGlobal::destroy_resource(wl_resource *resource)
{
TouchExtensionGlobal *self = static_cast<TouchExtensionGlobal *>(resource->data);
self->m_resources.removeOne(resource);
free(resource);
}
void TouchExtensionGlobal::bind_func(wl_client *client, void *data, uint32_t version, uint32_t id)
{
Q_UNUSED(version);
wl_resource *resource = wl_client_add_object(client, &qt_touch_extension_interface, &touch_interface, id, data);
resource->destroy = destroy_resource;
TouchExtensionGlobal *self = static_cast<TouchExtensionGlobal *>(resource->data);
self->m_resources.append(resource);
qt_touch_extension_send_configure(resource, self->m_flags);
}
static inline int toFixed(qreal f)
{
return int(f * 10000);
}
bool TouchExtensionGlobal::postTouchEvent(QTouchEvent *event, Surface *surface)
{
const QList<QTouchEvent::TouchPoint> points = event->touchPoints();
const int pointCount = points.count();
if (!pointCount)
return false;
QPointF surfacePos = surface->pos();
wl_client *surfaceClient = surface->resource()->client();
uint32_t time = m_compositor->currentTimeMsecs();
const int rescount = m_resources.count();
for (int res = 0; res < rescount; ++res) {
wl_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);
QPointF p = tp.pos() - surfacePos; // surface-relative
int x = toFixed(p.x());
int y = toFixed(p.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);
wl_array *rawData = 0;
QVector<QPointF> rawPosList = tp.rawScreenPositions();
int rawPosCount = rawPosList.count();
if (rawPosCount) {
rawPosCount = qMin(maxRawPos, rawPosCount);
rawData = &m_rawdata_array;
rawData->size = rawPosCount * sizeof(float) * 2;
float *p = m_rawdata_ptr;
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.
*p++ = float(rawPos.x());
*p++ = float(rawPos.y());
}
}
qt_touch_extension_send_touch(target,
time, id, state,
x, y, nx, ny, w, h,
pressure, vx, vy,
flags, rawData);
}
return true;
}
return false;
}
}
QT_END_NAMESPACE
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