/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the tools applications of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "qvfbmmap.h"+
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#include "qvfbhdr.h"+
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+
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#include <QTimer>+
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+
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#include <stdlib.h>+
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#include <unistd.h>+
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#include <sys/ipc.h>+
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#include <sys/types.h>+
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#include <sys/shm.h>+
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#include <sys/stat.h>+
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#include <sys/sem.h>+
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#include <sys/mman.h>+
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#include <fcntl.h>+
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#include <errno.h>+
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#include <math.h>+
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+
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QT_BEGIN_NAMESPACE+
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+
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QMMapViewProtocol::QMMapViewProtocol(int displayid, const QSize &s,+
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                                     int d, QObject *parent)+
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    : QVFbViewProtocol(displayid, parent), hdr(0), dataCache(0), windowId(0)+
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{+
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    switch (d) {+
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    case 1:+
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    case 4:+
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    case 8:+
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    case 12:+
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    case 15:+
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    case 16:+
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    case 18:+
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    case 24:+
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    case 32:+
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        break;+
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    default:+
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        qFatal("Unsupported bit depth %d\n", d);+
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    }+
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+
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    fileName = QString("/tmp/.qtvfb_map-%1").arg(displayid);+
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+
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    int w = s.width();+
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    int h = s.height();+
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+
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+
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    kh = new QVFbKeyPipeProtocol(displayid);+
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    mh = new QVFbMouseLinuxTP(displayid);+
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+
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    int bpl;+
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    if (d < 8)+
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	bpl = (w * d + 7) / 8;+
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    else+
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        bpl = w * ((d + 7) / 8);+
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+
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    displaySize = bpl * h;+
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+
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    unsigned char *data;+
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    uint data_offset_value = sizeof(QVFbHeader);+
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    const int page_size = getpagesize();+
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    if (data_offset_value % page_size)+
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        data_offset_value += page_size - (data_offset_value % page_size);+
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+
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    dataSize = bpl * h + data_offset_value;+
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+
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    unlink(fileName.toLocal8Bit().data());+
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    fd = ::open( fileName.toLocal8Bit().data(), O_CREAT|O_RDWR, 0666 );+
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    ::lseek(fd, dataSize, SEEK_SET);+
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    ::write(fd, "\0", 1);+
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    if (fd < 0) {+
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        data = (unsigned char *)-1;+
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    } else {+
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        // might need to do something about size?+
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        data = (unsigned char *)mmap(NULL, dataSize, PROT_WRITE | PROT_READ,+
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                                     MAP_SHARED, fd, 0);+
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        if (data == MAP_FAILED)+
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            data = (unsigned char *)-1;+
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    }+
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+
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    if ( (long)data == -1 ){+
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        delete kh;+
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        delete mh;+
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	qFatal( "Cannot attach to mapped file %s", fileName.toLocal8Bit().data());+
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    }+
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    dataCache = (unsigned char *)malloc(displaySize);+
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    memset(dataCache, 0, displaySize);+
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    memset(data+sizeof(QVFbHeader), 0, displaySize);+
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+
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    hdr = (QVFbHeader *)data;+
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    hdr->width = w;+
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    hdr->height = h;+
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    hdr->depth = d;+
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    hdr->linestep = bpl;+
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    hdr->numcols = 0;+
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    hdr->dataoffset = data_offset_value;+
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    hdr->update = QRect();+
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    hdr->brightness = 255;+
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    hdr->windowId = 0;+
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+
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    mRefreshTimer = new QTimer(this);+
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    connect(mRefreshTimer, SIGNAL(timeout()), this, SLOT(flushChanges()));+
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}+
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+
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QMMapViewProtocol::~QMMapViewProtocol()+
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{+
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    munmap((char *)hdr, dataSize);+
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    ::close(fd);+
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    unlink(fileName.toLocal8Bit().constData());+
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    free(dataCache);+
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    delete kh;+
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    delete mh;+
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}+
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+
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int QMMapViewProtocol::brightness() const+
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{+
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    return hdr->brightness;+
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}+
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+
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int QMMapViewProtocol::width() const+
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{+
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    return hdr->width;+
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}+
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+
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int QMMapViewProtocol::height() const+
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{+
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    return hdr->height;+
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}+
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+
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int QMMapViewProtocol::depth() const+
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{+
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    return hdr->depth;+
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}+
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+
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int QMMapViewProtocol::linestep() const+
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{+
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    return hdr->linestep;+
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}+
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+
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int  QMMapViewProtocol::numcols() const+
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{+
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    return hdr->numcols;+
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}+
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+
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QVector<QRgb> QMMapViewProtocol::clut() const+
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{+
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    QVector<QRgb> vector(hdr->numcols);+
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    for (int i=0; i < hdr->numcols; ++i)+
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        vector[i] = hdr->clut[i];+
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+
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    return vector;+
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}+
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+
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unsigned char *QMMapViewProtocol::data() const+
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{+
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    return dataCache;+
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    //return ((unsigned char *)hdr)+hdr->dataoffset;+
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}+
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+
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void QMMapViewProtocol::flushChanges()+
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{+
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    // based of dirty rect, copy changes from hdr to hdrcopy+
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    memcpy(dataCache, ((char *)hdr) + hdr->dataoffset, displaySize);+
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    emit displayDataChanged(QRect(0, 0, width(), height()));+
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}+
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+
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void QMMapViewProtocol::setRate(int interval)+
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{+
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    if (interval > 0)+
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        return mRefreshTimer->start(1000/interval);+
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    else+
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        mRefreshTimer->stop();+
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}+
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+
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int QMMapViewProtocol::rate() const+
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{+
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    int i = mRefreshTimer->interval();+
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    if (i > 0)+
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        return 1000/i;+
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    else+
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        return 0;+
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}+
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+
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QT_END_NAMESPACE+
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