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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the tools applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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, 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qlock_p.h"
+
+#include "qvfbshmem.h"
+#include "qvfbhdr.h"
+
+#include <QFile>
+#include <QTimer>
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/ipc.h>
+#include <sys/types.h>
+#include <sys/shm.h>
+#include <sys/stat.h>
+#include <sys/sem.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <math.h>
+
+QT_BEGIN_NAMESPACE
+
+#ifdef Q_WS_QWS
+#error qvfb must be compiled with the Qt for X11 package
+#endif
+
+// Get the name of the directory where Qt for Embedded Linux temporary data should
+// live.
+static QString qws_dataDir(int qws_display_id)
+{
+ QByteArray dataDir = QT_VFB_DATADIR(qws_display_id).toLocal8Bit();
+ if (mkdir(dataDir, 0700)) {
+ if (errno != EEXIST) {
+ qFatal("Cannot create Qt for Embedded Linux data directory: %s", dataDir.constData());
+ }
+ }
+
+ struct stat buf;
+ if (lstat(dataDir, &buf))
+ qFatal("stat failed for Qt for Embedded Linux data directory: %s", dataDir.constData());
+
+ if (!S_ISDIR(buf.st_mode))
+ qFatal("%s is not a directory", dataDir.constData());
+ if (buf.st_uid != getuid())
+ qFatal("Qt for Embedded Linux data directory is not owned by user %uh", getuid());
+
+ if ((buf.st_mode & 0677) != 0600)
+ qFatal("Qt for Embedded Linux data directory has incorrect permissions: %s", dataDir.constData());
+ dataDir += "/";
+
+ return QString(dataDir);
+}
+
+
+static QString displayPipe;
+static QString displayPiped;
+class DisplayLock
+{
+public:
+ DisplayLock() : qlock(0) {
+ if (QFile::exists(displayPiped)) {
+ qlock = new QLock(displayPipe, 'd', false);
+ qlock->lock(QLock::Read);
+ }
+ }
+ ~DisplayLock() {
+ if (qlock) {
+ qlock->unlock();
+ delete qlock;
+ qlock = 0;
+ }
+ }
+private:
+ QLock *qlock;
+};
+
+QShMemViewProtocol::QShMemViewProtocol(int displayid, const QSize &s,
+ int d, QObject *parent)
+ : QVFbViewProtocol(displayid, parent), hdr(0), dataCache(0), lockId(-1),
+ windowId(0)
+{
+ int w = s.width();
+ int h = s.height();
+
+ QString username = "unknown";
+ const char *logname = getenv("LOGNAME");
+ if ( logname )
+ username = logname;
+
+ qws_dataDir(displayid);
+
+ QString oldPipe = "/tmp/qtembedded-" + username + "/" + QString("QtEmbedded-%1").arg(displayid);
+ int oldPipeSemkey = ftok(oldPipe.toLatin1().constData(), 'd');
+ if (oldPipeSemkey != -1) {
+ int oldPipeLockId = semget(oldPipeSemkey, 0, 0);
+ if (oldPipeLockId >= 0){
+ sembuf sops;
+ sops.sem_num = 0;
+ sops.sem_op = 1;
+ sops.sem_flg = SEM_UNDO;
+ int rv;
+ do {
+ rv = semop(lockId,&sops,1);
+ } while (rv == -1 && errno == EINTR);
+
+ perror("QShMemViewProtocol::QShMemViewProtocol");
+ qFatal("Cannot create lock file as an old version of QVFb has "
+ "opened %s. Close other QVFb and try again",
+ oldPipe.toLatin1().constData());
+ }
+ }
+
+ displayPipe = QTE_PIPE_QVFB(displayid);
+
+ kh = new QVFbKeyPipeProtocol(displayid);
+ /* should really depend on receiving qt version, but how can
+ one tell? */
+ mh = new QVFbMousePipe(displayid);
+
+ QString mousePipe = mh->pipeName();
+
+ key_t key = ftok(mousePipe.toLatin1().constData(), 'b');
+
+ int bpl;
+ if (d < 8)
+ bpl = (w * d + 7) / 8;
+ else
+ bpl = w * ((d + 7) / 8);
+
+ displaySize = bpl * h;
+
+ unsigned char *data;
+ uint data_offset_value = sizeof(QVFbHeader);
+
+ int dataSize = bpl * h + data_offset_value;
+ shmId = shmget(key, dataSize, IPC_CREAT | 0666);
+ if (shmId != -1)
+ data = (unsigned char *)shmat(shmId, 0, 0);
+ else {
+ struct shmid_ds shm;
+ shmctl(shmId, IPC_RMID, &shm);
+ shmId = shmget(key, dataSize, IPC_CREAT | 0666);
+ if (shmId == -1) {
+ perror("QShMemViewProtocol::QShMemViewProtocol");
+ qFatal("Cannot get shared memory 0x%08x", key);
+ }
+ data = (unsigned char *)shmat(shmId, 0, 0);
+ }
+
+ if ((long)data == -1) {
+ delete kh;
+ delete mh;
+ perror("QShMemViewProtocol::QShMemViewProtocol");
+ qFatal("Cannot attach to shared memory %d",shmId);
+ }
+ dataCache = (unsigned char *)malloc(displaySize);
+ memset(dataCache, 0, displaySize);
+ memset(data+sizeof(QVFbHeader), 0, displaySize);
+
+ hdr = (QVFbHeader *)data;
+ hdr->width = w;
+ hdr->height = h;
+ hdr->depth = d;
+ hdr->linestep = bpl;
+ hdr->dataoffset = data_offset_value;
+ hdr->update = QRect();
+ hdr->dirty = 0;
+ hdr->numcols = 0;
+ hdr->viewerVersion = QT_VERSION;
+ hdr->brightness = 255;
+ hdr->windowId = 0;
+
+ displayPiped = displayPipe + 'd';
+
+
+ mRefreshTimer = new QTimer(this);
+ connect(mRefreshTimer, SIGNAL(timeout()), this, SLOT(flushChanges()));
+}
+
+QShMemViewProtocol::~QShMemViewProtocol()
+{
+ struct shmid_ds shm;
+ shmdt( (char*)hdr );
+ shmctl( shmId, IPC_RMID, &shm );
+ free(dataCache);
+ delete kh;
+ delete mh;
+}
+
+int QShMemViewProtocol::width() const
+{
+ return hdr->width;
+}
+
+int QShMemViewProtocol::height() const
+{
+ return hdr->height;
+}
+
+int QShMemViewProtocol::depth() const
+{
+ return hdr->depth;
+}
+
+int QShMemViewProtocol::linestep() const
+{
+ return hdr->linestep;
+}
+
+int QShMemViewProtocol::numcols() const
+{
+ return hdr->numcols;
+}
+
+QVector<QRgb> QShMemViewProtocol::clut() const
+{
+ QVector<QRgb> vector(hdr->numcols);
+ for (int i=0; i < hdr->numcols; ++i)
+ vector[i]=hdr->clut[i];
+
+ return vector;
+}
+
+unsigned char *QShMemViewProtocol::data() const
+{
+ return dataCache;
+ //return ((unsigned char *)hdr)+hdr->dataoffset;
+}
+
+int QShMemViewProtocol::brightness() const
+{
+ return hdr->brightness;
+}
+
+void QShMemViewProtocol::flushChanges()
+{
+ QRect r;
+ if (hdr->dirty) {
+ DisplayLock();
+
+ hdr->dirty = false;
+ r = hdr->update;
+ hdr->update = QRect();
+
+ if (hdr->windowId != windowId) {
+ windowId = hdr->windowId;
+ emit displayEmbedRequested(hdr->windowId);
+ } else if (!hdr->windowId) {
+ // copy the memory area, for now, be inefficient.
+ memcpy(dataCache, ((char *)hdr) + hdr->dataoffset, displaySize);
+ }
+ }
+ emit displayDataChanged(r);
+}
+
+void QShMemViewProtocol::setRate(int interval)
+{
+ if (interval > 0)
+ return mRefreshTimer->start(1000/interval);
+ else
+ mRefreshTimer->stop();
+}
+
+int QShMemViewProtocol::rate() const
+{
+ int i = mRefreshTimer->interval();
+ if (i > 0)
+ return 1000/i;
+ else
+ return 0;
+}
+
+QT_END_NAMESPACE
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