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/***************************************************************************
**
** Copyright (C) 2011 - 2012 Research In Motion
** Contact: http://www.qt-project.org/legal
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qqnxrasterbackingstore.h"
#include "qqnxwindow.h"
#include <QtCore/QDebug>
#include <errno.h>
#ifdef QQNXRASTERBACKINGSTORE_DEBUG
#define qRasterBackingStoreDebug qDebug
#else
#define qRasterBackingStoreDebug QT_NO_QDEBUG_MACRO
#endif
QT_BEGIN_NAMESPACE
QQnxRasterBackingStore::QQnxRasterBackingStore(QWindow *window)
: QPlatformBackingStore(window),
m_hasUnflushedPaintOperations(false)
{
qRasterBackingStoreDebug() << Q_FUNC_INFO << "w =" << window;
// save platform window associated with widget
m_platformWindow = static_cast<QQnxWindow*>(window->handle());
}
QQnxRasterBackingStore::~QQnxRasterBackingStore()
{
qRasterBackingStoreDebug() << Q_FUNC_INFO << "w =" << window();
}
QPaintDevice *QQnxRasterBackingStore::paintDevice()
{
if (m_platformWindow->hasBuffers())
return m_platformWindow->renderBuffer().image();
return 0;
}
void QQnxRasterBackingStore::flush(QWindow *window, const QRegion ®ion, const QPoint &offset)
{
qRasterBackingStoreDebug() << Q_FUNC_INFO << "w =" << this->window();
QQnxWindow *targetWindow = 0;
if (window)
targetWindow = static_cast<QQnxWindow *>(window->handle());
if (!targetWindow || targetWindow == m_platformWindow) {
// visit all pending scroll operations
for (int i = m_scrollOpList.size() - 1; i >= 0; i--) {
// do the scroll operation
ScrollOp &op = m_scrollOpList[i];
QRegion srcArea = op.totalArea.intersected( op.totalArea.translated(-op.dx, -op.dy) );
m_platformWindow->scroll(srcArea, op.dx, op.dy);
}
// clear all pending scroll operations
m_scrollOpList.clear();
// update the display with newly rendered content
m_platformWindow->post(region);
} else if (targetWindow) {
// The contents of the backing store should be flushed to a different window than the
// window which owns the buffer.
// This typically happens for child windows, since child windows share a backing store with
// their top-level window (TLW).
// Simply copy the buffer over to the child window, to emulate a painting operation, and
// then post the window.
//
// ### Note that because of the design in the QNX QPA plugin, each window has its own buffers,
// even though they might share a backing store. This is unneeded overhead, but I don't think
// libscreen allows to have windows without buffers, or does it?
// We assume that the TLW has been flushed previously and that no changes were made to the
// backing store inbetween (### does Qt guarantee this?)
Q_ASSERT(!m_hasUnflushedPaintOperations);
targetWindow->adjustBufferSize();
targetWindow->blitFrom(m_platformWindow, offset, region);
targetWindow->post(region);
} else {
qWarning() << Q_FUNC_INFO << "flush() called without a valid window!";
}
m_hasUnflushedPaintOperations = false;
}
void QQnxRasterBackingStore::resize(const QSize &size, const QRegion &staticContents)
{
Q_UNUSED(size);
Q_UNUSED(staticContents);
qRasterBackingStoreDebug() << Q_FUNC_INFO << "w =" << window() << ", s =" << size;
// NOTE: defer resizing window buffers until next paint as
// resize() can be called multiple times before a paint occurs
}
bool QQnxRasterBackingStore::scroll(const QRegion &area, int dx, int dy)
{
qRasterBackingStoreDebug() << Q_FUNC_INFO << "w =" << window();
// calculate entire region affected by scroll operation (src + dst)
QRegion totalArea = area.translated(dx, dy);
totalArea += area;
m_hasUnflushedPaintOperations = true;
// visit all pending scroll operations
for (int i = m_scrollOpList.size() - 1; i >= 0; i--) {
ScrollOp &op = m_scrollOpList[i];
if (op.totalArea == totalArea) {
// same area is being scrolled again - update delta
op.dx += dx;
op.dy += dy;
return true;
} else if (op.totalArea.intersects(totalArea)) {
// current scroll overlaps previous scroll but is
// not equal in area - just paint everything
qWarning("QQNX: pending scroll operations overlap but not equal");
return false;
}
}
// create new scroll operation
m_scrollOpList.append( ScrollOp(totalArea, dx, dy) );
return true;
}
void QQnxRasterBackingStore::beginPaint(const QRegion ®ion)
{
Q_UNUSED(region);
qRasterBackingStoreDebug() << Q_FUNC_INFO << "w =" << window();
m_hasUnflushedPaintOperations = true;
m_platformWindow->adjustBufferSize();
}
void QQnxRasterBackingStore::endPaint(const QRegion ®ion)
{
Q_UNUSED(region);
qRasterBackingStoreDebug() << Q_FUNC_INFO << "w =" << window();
}
QT_END_NAMESPACE
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