Port the QVFb backend to the new API

1 files changed, 439 insertions, 0 deletions

diff --git a/src/plugins/platforms/qvfb/qvfbintegration.cpp b/src/plugins/platforms/qvfb/qvfbintegration.cpp
new file mode 100644
index 0000000..2a877e0
--- /dev/null
+++ b/src/plugins/platforms/qvfb/qvfbintegration.cpp
@@ -0,0 +1,439 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the plugins 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 <stdlib.h>
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <private/qcore_unix_p.h> // overrides QT_OPEN
+
+#include <qvfbhdr.h>
+#include <qsocketnotifier.h>
+
+#include "qvfbintegration.h"
+#include "qwindowsurface_qvfb.h"
+#include <QtGui/private/qpixmap_raster_p.h>
+#include <QtCore/qdebug.h>
+#include <QMouseEvent>
+
+#include <qsocketnotifier.h>
+#include <QApplication>
+#include <QWindowSystemInterface>
+
+QT_BEGIN_NAMESPACE
+
+
+class QVFbScreenKeyboardHandler : public QObject
+{
+    Q_OBJECT
+public:
+    QVFbScreenKeyboardHandler();
+    ~QVFbScreenKeyboardHandler();
+
+private slots:
+    void readKeyboardData();
+
+private:
+    int kbdFD;
+    int kbdIdx;
+    int kbdBufferLen;
+    unsigned char *kbdBuffer;
+    QSocketNotifier *keyNotifier;
+};
+
+QVFbScreenKeyboardHandler::QVFbScreenKeyboardHandler()
+{
+    int displayId = 0; //TODO displayId
+    const QString keyboardDev = QT_VFB_KEYBOARD_PIPE(displayId);
+
+
+    kbdFD = -1;
+    kbdIdx = 0;
+    kbdBufferLen = sizeof(QVFbKeyData) * 5;
+    kbdBuffer = new unsigned char [kbdBufferLen];
+
+    kbdFD = QT_OPEN(keyboardDev.toLatin1().constData(), O_RDWR | O_NDELAY);
+
+    if (kbdFD == -1) {
+        perror("QVFbScreenKeyboardHandler");
+        qWarning("QVFbScreenKeyboardHandler: Unable to open device %s",
+                 qPrintable(keyboardDev));
+        return;
+    }
+
+    // Clear pending input
+    char buf[2];
+    while (QT_READ(kbdFD, buf, 1) > 0) { }
+
+    keyNotifier = new QSocketNotifier(kbdFD, QSocketNotifier::Read, this);
+    connect(keyNotifier, SIGNAL(activated(int)),this, SLOT(readKeyboardData()));
+
+}
+
+QVFbScreenKeyboardHandler::~QVFbScreenKeyboardHandler()
+{
+    if (kbdFD >= 0)
+        QT_CLOSE(kbdFD);
+    delete [] kbdBuffer;
+}
+
+
+void QVFbScreenKeyboardHandler::readKeyboardData()
+{
+    int n;
+    do {
+        n  = QT_READ(kbdFD, kbdBuffer+kbdIdx, kbdBufferLen - kbdIdx);
+        if (n > 0)
+            kbdIdx += n;
+    } while (n > 0);
+
+    int idx = 0;
+    while (kbdIdx - idx >= (int)sizeof(QVFbKeyData)) {
+        QVFbKeyData *kd = (QVFbKeyData *)(kbdBuffer + idx);
+        if (kd->unicode == 0 && kd->keycode == 0 && kd->modifiers == 0 && kd->press) {
+            // magic exit key
+            qWarning("Instructed to quit by Virtual Keyboard");
+            qApp->quit();
+        }
+
+        //QWSServer::processKeyEvent(kd->unicode ? kd->unicode : 0xffff, kd->keycode, kd->modifiers, kd->press, kd->repeat);
+
+        QEvent::Type type = kd->press ? QEvent::KeyPress : QEvent::KeyRelease;
+
+        QString text;
+        if (kd->unicode && kd->unicode != 0xffff)
+            text += QChar(kd->unicode);
+
+//        qDebug() << "readKeyboardData" << type << hex << kd->keycode << kd->modifiers << text;
+
+        QWindowSystemInterface::handleKeyEvent(0, type, kd->keycode, kd->modifiers, text, kd->repeat, int(text.length()));
+        idx += sizeof(QVFbKeyData);
+    }
+
+    int surplus = kbdIdx - idx;
+    for (int i = 0; i < surplus; i++)
+        kbdBuffer[i] = kbdBuffer[idx+i];
+    kbdIdx = surplus;
+}
+
+
+
+
+class QVFbScreenMouseHandler : public QObject
+{
+    Q_OBJECT
+public:
+    QVFbScreenMouseHandler();
+    ~QVFbScreenMouseHandler();
+
+private slots:
+    void readMouseData();
+
+private:
+    int mouseFD;
+    int mouseIdx;
+    enum {mouseBufSize = 128};
+    uchar mouseBuf[mouseBufSize];
+    QSocketNotifier *mouseNotifier;
+
+    int oldButtonState;
+};
+
+QVFbScreenMouseHandler::QVFbScreenMouseHandler()
+{
+    int displayId = 0; //TODO: displayId
+    QString mouseDev = QT_VFB_MOUSE_PIPE(displayId);
+
+    mouseFD = QT_OPEN(mouseDev.toLatin1().constData(), O_RDWR | O_NDELAY);
+
+        if (mouseFD == -1) {
+        perror("QVFbMouseHandler::QVFbMouseHandler");
+        qWarning("QVFbMouseHander: Unable to open device %s",
+                 qPrintable(mouseDev));
+        return;
+    }
+
+    // Clear pending input
+    char buf[2];
+    while (QT_READ(mouseFD, buf, 1) > 0) { }
+
+    mouseIdx = 0;
+    oldButtonState = 0;
+    mouseNotifier = new QSocketNotifier(mouseFD, QSocketNotifier::Read, this);
+    connect(mouseNotifier, SIGNAL(activated(int)),this, SLOT(readMouseData()));
+}
+
+
+QVFbScreenMouseHandler::~QVFbScreenMouseHandler()
+{
+    if (mouseFD >= 0)
+        QT_CLOSE(mouseFD);
+}
+
+void QVFbScreenMouseHandler::readMouseData()
+{
+   int n;
+    do {
+        n = QT_READ(mouseFD, mouseBuf+mouseIdx, mouseBufSize-mouseIdx);
+        if (n > 0)
+            mouseIdx += n;
+    } while (n > 0);
+
+    int idx = 0;
+    static const int packetsize = sizeof(QPoint) + 2*sizeof(int);
+    while (mouseIdx-idx >= packetsize) {
+        uchar *mb = mouseBuf+idx;
+        QPoint mousePos = *reinterpret_cast<QPoint *>(mb);
+        mb += sizeof(QPoint);
+        int bstate = *reinterpret_cast<int *>(mb);
+        mb += sizeof(int);
+        //int wheel = *reinterpret_cast<int *>(mb);
+
+        int button = bstate ^ oldButtonState;
+        QEvent::Type type = QEvent::MouseMove;
+
+        if (button) {
+            type = (button & bstate) ? QEvent::MouseButtonPress : QEvent::MouseButtonRelease;
+        }
+        QWindowSystemInterface::handleMouseEvent(0, mousePos, mousePos, Qt::MouseButtons(bstate));
+
+//        qDebug() << "readMouseData" << mousePos << button << bstate << oldButtonState << type;
+
+        oldButtonState = bstate;
+
+        idx += packetsize;
+    }
+
+    int surplus = mouseIdx - idx;
+    for (int i = 0; i < surplus; i++)
+        mouseBuf[i] = mouseBuf[idx+i];
+    mouseIdx = surplus;
+
+}
+
+
+class QVFbScreenPrivate
+{
+public:
+    QVFbScreenPrivate(QVFbScreen *)
+        : shmrgn(0), hdr(0), data(0), mouseHandler(0), keyboardHandler(0)
+        {
+            connect(0); //for now we only handle one screen
+        }
+
+    ~QVFbScreenPrivate() { disconnect(); }
+    void setDirty(const QRect &r);
+
+    bool connect(int displayId);
+    void disconnect();
+
+    QImage *screenImage() { return &img; }
+    QSize screenSize() { return img.size(); }
+
+    int depth() const { return img.depth(); }
+    QImage::Format format() const { return img.format(); }
+
+private:
+    unsigned char *shmrgn;
+    QVFbHeader *hdr;
+    uchar *data;
+    QVFbScreenMouseHandler *mouseHandler;
+    QVFbScreenKeyboardHandler *keyboardHandler;
+
+
+    QImage img;
+};
+
+
+void QVFbScreenPrivate::setDirty(const QRect &r)
+{
+    hdr->dirty = true;
+    hdr->update = hdr->update.united(r);
+}
+
+
+bool QVFbScreenPrivate::connect(int displayId)
+{
+
+    key_t key = ftok(QT_VFB_MOUSE_PIPE(displayId).toLatin1(), 'b');
+
+    if (key == -1)
+        return false;
+
+
+    int shmId = shmget(key, 0, 0);
+    if (shmId != -1)
+        shmrgn = (unsigned char *)shmat(shmId, 0, 0);
+    else
+        return false;
+
+    if ((long)shmrgn == -1 || shmrgn == 0) {
+        qDebug("No shmrgn %ld", (long)shmrgn);
+        return false;
+    }
+
+    hdr = (QVFbHeader *)shmrgn;
+    data = shmrgn + hdr->dataoffset;
+
+    int w = hdr->width;
+    int h = hdr->height;
+    int d = hdr->depth;
+    int lstep = hdr->linestep;
+
+    QImage::Format format = QImage::Format_Invalid;
+    if (d == 32)
+        format = QImage::Format_ARGB32_Premultiplied;
+    else if (d == 16)
+        format = QImage::Format_RGB16;
+
+
+    if (format == QImage::Format_Invalid) {
+        img = QImage();
+        return false;
+    }
+
+    img = QImage(data, w, h, lstep, format);
+
+    qDebug("connected %dx%d %d bpp", w, h, d);
+
+
+    mouseHandler = new QVFbScreenMouseHandler;
+    keyboardHandler = new QVFbScreenKeyboardHandler;
+    return true;
+}
+
+void QVFbScreenPrivate::disconnect()
+{
+    if ((long)shmrgn != -1 && shmrgn) {
+        shmdt((char*)shmrgn);
+        shmrgn = 0;
+    }
+    delete mouseHandler;
+    mouseHandler = 0;
+    delete keyboardHandler;
+    keyboardHandler = 0;
+}
+
+
+QVFbScreen::QVFbScreen()
+{
+    d_ptr = new QVFbScreenPrivate(this);
+}
+
+
+QVFbScreen::~QVFbScreen()
+{
+    delete d_ptr;
+}
+
+void QVFbScreen::setDirty(const QRect &rect)
+{
+    d_ptr->setDirty(rect);
+}
+
+
+
+QRect QVFbScreen::geometry() const {
+    return QRect(QPoint(), d_ptr->screenSize());
+}
+
+
+int QVFbScreen::depth() const
+{
+    return d_ptr->depth();
+}
+
+QImage::Format QVFbScreen::format() const
+{
+    return d_ptr->format();
+}
+
+QSize QVFbScreen::physicalSize() const {
+    return (d_ptr->screenSize()*254)/720;
+}
+
+#if 0
+int QVFbScreen::linestep() const {
+    return d_ptr->screenImage() ? d_ptr->screenImage()->bytesPerLine() : 0;
+}
+
+uchar *QVFbScreen::base() const {
+    return d_ptr->screenImage() ? d_ptr->screenImage()->bits() : 0;
+}
+#endif
+
+QImage *QVFbScreen::screenImage()
+{
+    return d_ptr->screenImage();
+}
+
+QVFbIntegration::QVFbIntegration()
+{
+    mPrimaryScreen = new QVFbScreen();
+
+    mScreens.append(mPrimaryScreen);
+}
+
+QPixmapData *QVFbIntegration::createPixmapData(QPixmapData::PixelType type) const
+{
+    return new QRasterPixmapData(type);
+}
+
+QWindowSurface *QVFbIntegration::createWindowSurfaceForWindow(QWidget *widget, WId) const
+{
+    if (widget->windowType() == Qt::Desktop)
+        return 0;   // Don't create an explicit window surface for the destkop.
+    return new QVFbWindowSurface(mPrimaryScreen, widget);
+}
+
+
+QPlatformWindow *QVFbIntegration::createPlatformWindow(QWidget *widget, WId) const
+{
+    return new QVFbWindow(mPrimaryScreen, widget);
+}
+
+QT_END_NAMESPACE
+
+#include "qgraphicssystem_qvfb.moc"