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 = "******";
const char *logname = getenv("LOGNAME");
if ( logname )
username = logname;
qws_dataDir(displayid);
{
QString oldPipe = "/tmp/qtembedded-" + username + "/" + QString("QtEmbedded-%1").arg(displayid);
QLock oldPipeLock(oldPipe, 'd', false);
if (oldPipeLock.isValid()) {
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 | 0600);
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 | 0600);
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()));
}
QT_BEGIN_NAMESPACE
QMMapViewProtocol::QMMapViewProtocol(int displayid, const QSize &s,
int d, QObject *parent)
: QVFbViewProtocol(displayid, parent), hdr(0), dataCache(0), windowId(0)
{
switch (d) {
case 1:
case 4:
case 8:
case 12:
case 15:
case 16:
case 18:
case 24:
case 32:
break;
default:
qFatal("Unsupported bit depth %d\n", d);
}
fileName = QString("/tmp/.qtvfb_map-%1").arg(displayid);
int w = s.width();
int h = s.height();
kh = new QVFbKeyPipeProtocol(displayid);
mh = new QVFbMouseLinuxTP(displayid);
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);
const int page_size = getpagesize();
if (data_offset_value % page_size)
data_offset_value += page_size - (data_offset_value % page_size);
dataSize = bpl * h + data_offset_value;
unlink(fileName.toLocal8Bit().data());
fd = ::open( fileName.toLocal8Bit().data(), O_CREAT|O_RDWR, 0666 );
::lseek(fd, dataSize, SEEK_SET);
::write(fd, "\0", 1);
if (fd < 0) {
data = (unsigned char *)-1;
} else {
// might need to do something about size?
data = (unsigned char *)mmap(NULL, dataSize, PROT_WRITE | PROT_READ,
MAP_SHARED, fd, 0);
if (data == MAP_FAILED)
data = (unsigned char *)-1;
}
if ( (long)data == -1 ){
delete kh;
delete mh;
qFatal( "Cannot attach to mapped file %s", fileName.toLocal8Bit().data());
}
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->numcols = 0;
hdr->dataoffset = data_offset_value;
hdr->update = QRect();
hdr->brightness = 255;
hdr->windowId = 0;
mRefreshTimer = new QTimer(this);
connect(mRefreshTimer, SIGNAL(timeout()), this, SLOT(flushChanges()));
}
