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/****************************************************************************
**
** Copyright (C) 2011 - 2012 Research In Motion <blackberry-qt@qnx.com>
** Contact: http://www.qt-project.org/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia 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.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
//#define QBBBUFFER_DEBUG
#include "qbbbuffer.h"
#include <QDebug>
#include <errno.h>
#include <sys/mman.h>
QT_BEGIN_NAMESPACE
QBBBuffer::QBBBuffer()
: mBuffer(NULL)
{
#if defined(QBBBUFFER_DEBUG)
qDebug() << "QBBBuffer::QBBBuffer - empty";
#endif
}
QBBBuffer::QBBBuffer(screen_buffer_t buffer)
: mBuffer(buffer)
{
#if defined(QBBBUFFER_DEBUG)
qDebug() << "QBBBuffer::QBBBuffer - normal";
#endif
// get size of buffer
errno = 0;
int size[2];
int result = screen_get_buffer_property_iv(buffer, SCREEN_PROPERTY_BUFFER_SIZE, size);
if (result != 0) {
qFatal("QBB: failed to query buffer size, errno=%d", errno);
}
// get stride of buffer
errno = 0;
int stride;
result = screen_get_buffer_property_iv(buffer, SCREEN_PROPERTY_STRIDE, &stride);
if (result != 0) {
qFatal("QBB: failed to query buffer stride, errno=%d", errno);
}
// get access to buffer's data
errno = 0;
uchar* dataPtr = NULL;
result = screen_get_buffer_property_pv(buffer, SCREEN_PROPERTY_POINTER, (void **)&dataPtr);
if (result != 0) {
qFatal("QBB: failed to query buffer pointer, errno=%d", errno);
}
if (dataPtr == NULL) {
qFatal("QBB: buffer pointer is NULL, errno=%d", errno);
}
// get format of buffer
errno = 0;
int screenFormat;
result = screen_get_buffer_property_iv(buffer, SCREEN_PROPERTY_FORMAT, &screenFormat);
if (result != 0) {
qFatal("QBB: failed to query buffer format, errno=%d", errno);
}
// convert screen format to QImage format
QImage::Format imageFormat = QImage::Format_Invalid;
switch (screenFormat) {
case SCREEN_FORMAT_RGBX4444:
imageFormat = QImage::Format_RGB444;
break;
case SCREEN_FORMAT_RGBA4444:
imageFormat = QImage::Format_ARGB4444_Premultiplied;
break;
case SCREEN_FORMAT_RGBX5551:
imageFormat = QImage::Format_RGB555;
break;
case SCREEN_FORMAT_RGB565:
imageFormat = QImage::Format_RGB16;
break;
case SCREEN_FORMAT_RGBX8888:
imageFormat = QImage::Format_RGB32;
break;
case SCREEN_FORMAT_RGBA8888:
imageFormat = QImage::Format_ARGB32_Premultiplied;
break;
default:
qFatal("QBB: unsupported buffer format, format=%d", screenFormat);
}
// wrap buffer in an image
mImage = QImage(dataPtr, size[0], size[1], stride, imageFormat);
}
QBBBuffer::QBBBuffer(const QBBBuffer &other)
: mBuffer(other.mBuffer),
mImage(other.mImage)
{
#if defined(QBBBUFFER_DEBUG)
qDebug() << "QBBBuffer::QBBBuffer - copy";
#endif
}
QBBBuffer::~QBBBuffer()
{
#if defined(QBBBUFFER_DEBUG)
qDebug() << "QBBBuffer::~QBBBuffer";
#endif
}
void QBBBuffer::invalidateInCache()
{
#if defined(QBBBUFFER_DEBUG)
qDebug() << "QBBBuffer::invalidateInCache";
#endif
// verify native buffer exists
if (mBuffer == NULL) {
qFatal("QBB: can't invalidate cache for null buffer");
}
// evict buffer's data from cache
errno = 0;
int result = msync(mImage.bits(), mImage.height() * mImage.bytesPerLine(), MS_INVALIDATE | MS_CACHE_ONLY);
if (result != 0) {
qFatal("QBB: failed to invalidate cache, errno=%d", errno);
}
}
QT_END_NAMESPACE
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