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Diffstat (limited to 'tools/qvfb/qvfbmmap.cpp')
| -rw-r--r-- | tools/qvfb/qvfbmmap.cpp | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/tools/qvfb/qvfbmmap.cpp b/tools/qvfb/qvfbmmap.cpp new file mode 100644 index 0000000..d8230f7 --- /dev/null +++ b/tools/qvfb/qvfbmmap.cpp @@ -0,0 +1,222 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, 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. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qvfbmmap.h" +#include "qvfbhdr.h" + +#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 + +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())); +} + +QMMapViewProtocol::~QMMapViewProtocol() +{ + munmap((char *)hdr, dataSize); + ::close(fd); + unlink(fileName.toLocal8Bit().constData()); + free(dataCache); + delete kh; + delete mh; +} + +int QMMapViewProtocol::brightness() const +{ + return hdr->brightness; +} + +int QMMapViewProtocol::width() const +{ + return hdr->width; +} + +int QMMapViewProtocol::height() const +{ + return hdr->height; +} + +int QMMapViewProtocol::depth() const +{ + return hdr->depth; +} + +int QMMapViewProtocol::linestep() const +{ + return hdr->linestep; +} + +int QMMapViewProtocol::numcols() const +{ + return hdr->numcols; +} + +QVector<QRgb> QMMapViewProtocol::clut() const +{ + QVector<QRgb> vector(hdr->numcols); + for (int i=0; i < hdr->numcols; ++i) + vector[i] = hdr->clut[i]; + + return vector; +} + +unsigned char *QMMapViewProtocol::data() const +{ + return dataCache; + //return ((unsigned char *)hdr)+hdr->dataoffset; +} + +void QMMapViewProtocol::flushChanges() +{ + // based of dirty rect, copy changes from hdr to hdrcopy + memcpy(dataCache, ((char *)hdr) + hdr->dataoffset, displaySize); + emit displayDataChanged(QRect(0, 0, width(), height())); +} + +void QMMapViewProtocol::setRate(int interval) +{ + if (interval > 0) + return mRefreshTimer->start(1000/interval); + else + mRefreshTimer->stop(); +} + +int QMMapViewProtocol::rate() const +{ + int i = mRefreshTimer->interval(); + if (i > 0) + return 1000/i; + else + return 0; +} + +QT_END_NAMESPACE |