qscreenvfb_qws.cpp

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#ifndef QT_NO_QWS_QVFB

#define QTOPIA_QVFB_BRIGHTNESS

#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 <qvfbhdr.h>
#include <qscreenvfb_qws.h>
#include <qkbdvfb_qws.h>
#include <qmousevfb_qws.h>
#include <qwindowsystem_qws.h>
#include <qsocketnotifier.h>
#include <qapplication.h>
#include <qscreen_qws.h>
#include <qmousedriverfactory_qws.h>
#include <qkbddriverfactory_qws.h>
#include <qdebug.h>

QT_BEGIN_NAMESPACE

class QVFbScreenPrivate
{
public:
    QVFbScreenPrivate();
    ~QVFbScreenPrivate();

    bool success;
    unsigned char *shmrgn;
    int brightness;
    bool blank;
    QVFbHeader *hdr;
    QWSMouseHandler *mouse;
#ifndef QT_NO_QWS_KEYBOARD
    QWSKeyboardHandler *keyboard;
#endif
};

QVFbScreenPrivate::QVFbScreenPrivate()
    : mouse(0)

{
#ifndef QT_NO_QWS_KEYBOARD
    keyboard = 0;
#endif
    brightness = 255;
    blank = false;
}

QVFbScreenPrivate::~QVFbScreenPrivate()
{
    delete mouse;
#ifndef QT_NO_QWS_KEYBOARD
    delete keyboard;
#endif
}

QVFbScreen::QVFbScreen(int display_id)
    : QScreen(display_id, VFbClass), d_ptr(new QVFbScreenPrivate)
{
    d_ptr->shmrgn = 0;
    d_ptr->hdr = 0;
    data = 0;
}

QVFbScreen::~QVFbScreen()
{
    delete d_ptr;
}

static QVFbScreen *connected = 0;

bool QVFbScreen::connect(const QString &displaySpec)
{
    QStringList displayArgs = displaySpec.split(QLatin1Char(':'));
    if (displayArgs.contains(QLatin1String("Gray")))
        grayscale = true;

    key_t key = ftok(QT_VFB_MOUSE_PIPE(displayId).toLocal8Bit(), 'b');

    if (key == -1)
        return false;

#if Q_BYTE_ORDER == Q_BIG_ENDIAN
#ifndef QT_QWS_FRAMEBUFFER_LITTLE_ENDIAN
    if (displayArgs.contains(QLatin1String("littleendian")))
#endif
        QScreen::setFrameBufferLittleEndian(true);
#endif

    int shmId = shmget(key, 0, 0);
    if (shmId != -1)
        d_ptr->shmrgn = (unsigned char *)shmat(shmId, 0, 0);
    else
        return false;

    if ((long)d_ptr->shmrgn == -1 || d_ptr->shmrgn == 0) {
        qDebug("No shmrgn %ld", (long)d_ptr->shmrgn);
        return false;
    }

    d_ptr->hdr = (QVFbHeader *)d_ptr->shmrgn;
    data = d_ptr->shmrgn + d_ptr->hdr->dataoffset;

    dw = w = d_ptr->hdr->width;
    dh = h = d_ptr->hdr->height;
    d = d_ptr->hdr->depth;

    switch (d) {
    case 1:
        setPixelFormat(QImage::Format_Mono);
        break;
    case 8:
        setPixelFormat(QImage::Format_Indexed8);
        break;
    case 12:
        setPixelFormat(QImage::Format_RGB444);
        break;
    case 15:
        setPixelFormat(QImage::Format_RGB555);
        break;
    case 16:
        setPixelFormat(QImage::Format_RGB16);
        break;
    case 18:
        setPixelFormat(QImage::Format_RGB666);
        break;
    case 24:
        setPixelFormat(QImage::Format_RGB888);
        break;
    case 32:
        setPixelFormat(QImage::Format_ARGB32_Premultiplied);
        break;
    }

    lstep = d_ptr->hdr->linestep;

    // Handle display physical size spec.
    int dimIdxW = -1;
    int dimIdxH = -1;
    for (int i = 0; i < displayArgs.size(); ++i) {
        if (displayArgs.at(i).startsWith(QLatin1String("mmWidth"))) {
            dimIdxW = i;
            break;
        }
    }
    for (int i = 0; i < displayArgs.size(); ++i) {
        if (displayArgs.at(i).startsWith(QLatin1String("mmHeight"))) {
            dimIdxH = i;
            break;
        }
    }
    if (dimIdxW >= 0) {
        bool ok;
        int pos = 7;
        if (displayArgs.at(dimIdxW).at(pos) == QLatin1Char('='))
            ++pos;
        int pw = displayArgs.at(dimIdxW).mid(pos).toInt(&ok);
        if (ok) {
            physWidth = pw;
            if (dimIdxH < 0)
                physHeight = dh*physWidth/dw;
        }
    }
    if (dimIdxH >= 0) {
        bool ok;
        int pos = 8;
        if (displayArgs.at(dimIdxH).at(pos) == QLatin1Char('='))
            ++pos;
        int ph = displayArgs.at(dimIdxH).mid(pos).toInt(&ok);
        if (ok) {
            physHeight = ph;
            if (dimIdxW < 0)
                physWidth = dw*physHeight/dh;
        }
    }
    if (dimIdxW < 0 && dimIdxH < 0) {
        const int dpi = 72;
        physWidth = qRound(dw * 25.4 / dpi);
        physHeight = qRound(dh * 25.4 / dpi);
    }

    qDebug("Connected to VFB server %s: %d x %d x %d %dx%dmm (%dx%ddpi)", displaySpec.toLatin1().data(),
        w, h, d, physWidth, physHeight, qRound(dw*25.4/physWidth), qRound(dh*25.4/physHeight) );

    size = lstep * h;
    mapsize = size;
    screencols = d_ptr->hdr->numcols;
    memcpy(screenclut, d_ptr->hdr->clut, sizeof(QRgb) * screencols);

    connected = this;

    if (qgetenv("QT_QVFB_BGR").toInt())
        pixeltype = BGRPixel;

    return true;
}

void QVFbScreen::disconnect()
{
    connected = 0;
    if ((long)d_ptr->shmrgn != -1 && d_ptr->shmrgn) {
        if (qApp->type() == QApplication::GuiServer && d_ptr->hdr->dataoffset >= (int)sizeof(QVFbHeader)) {
            d_ptr->hdr->serverVersion = 0;
        }
        shmdt((char*)d_ptr->shmrgn);
    }
}

bool QVFbScreen::initDevice()
{
#ifndef QT_NO_QWS_MOUSE_QVFB
    const QString mouseDev = QT_VFB_MOUSE_PIPE(displayId);
    d_ptr->mouse = new QVFbMouseHandler(QLatin1String("QVFbMouse"), mouseDev);
    qwsServer->setDefaultMouse("None");
    if (d_ptr->mouse)
        d_ptr->mouse->setScreen(this);
#endif

#if !defined(QT_NO_QWS_KBD_QVFB) && !defined(QT_NO_QWS_KEYBOARD)
    const QString keyboardDev = QT_VFB_KEYBOARD_PIPE(displayId);
    d_ptr->keyboard = new QVFbKeyboardHandler(keyboardDev);
    qwsServer->setDefaultKeyboard("None");
#endif

    if (d_ptr->hdr->dataoffset >= (int)sizeof(QVFbHeader))
        d_ptr->hdr->serverVersion = QT_VERSION;

    if(d==8) {
        screencols=256;
        if (grayscale) {
            // Build grayscale palette
            for(int loopc=0;loopc<256;loopc++) {
                screenclut[loopc]=qRgb(loopc,loopc,loopc);
            }
        } else {
            // 6x6x6 216 color cube
            int idx = 0;
            for(int ir = 0x0; ir <= 0xff; ir+=0x33) {
                for(int ig = 0x0; ig <= 0xff; ig+=0x33) {
                    for(int ib = 0x0; ib <= 0xff; ib+=0x33) {
                        screenclut[idx]=qRgb(ir, ig, ib);
                        idx++;
                    }
                }
            }
            screencols=idx;
        }
        memcpy(d_ptr->hdr->clut, screenclut, sizeof(QRgb) * screencols);
        d_ptr->hdr->numcols = screencols;
    } else if (d == 4) {
        int val = 0;
        for (int idx = 0; idx < 16; idx++, val += 17) {
            screenclut[idx] = qRgb(val, val, val);
        }
        screencols = 16;
        memcpy(d_ptr->hdr->clut, screenclut, sizeof(QRgb) * screencols);
        d_ptr->hdr->numcols = screencols;
    } else if (d == 1) {
        screencols = 2;
        screenclut[1] = qRgb(0xff, 0xff, 0xff);
        screenclut[0] = qRgb(0, 0, 0);
        memcpy(d_ptr->hdr->clut, screenclut, sizeof(QRgb) * screencols);
        d_ptr->hdr->numcols = screencols;
    }

#ifndef QT_NO_QWS_CURSOR
    QScreenCursor::initSoftwareCursor();
#endif
    return true;
}

void QVFbScreen::shutdownDevice()
{
}

void QVFbScreen::setMode(int ,int ,int)
{
}

// save the state of the graphics card
// This is needed so that e.g. we can restore the palette when switching
// between linux virtual consoles.
void QVFbScreen::save()
{
    // nothing to do.
}

// restore the state of the graphics card.
void QVFbScreen::restore()
{
}
void QVFbScreen::setDirty(const QRect& rect)
{
    const QRect r = rect.translated(-offset());
    d_ptr->hdr->dirty = true;
    d_ptr->hdr->update = d_ptr->hdr->update.united(r);
}

void QVFbScreen::setBrightness(int b)
{
    if (connected) {
        connected->d_ptr->brightness = b;

        QVFbHeader *hdr = connected->d_ptr->hdr;
        if (hdr->viewerVersion < 0x040400) // brightness not supported
            return;

        const int br = connected->d_ptr->blank ? 0 : b;
        if (hdr->brightness != br) {
            hdr->brightness = br;
            connected->setDirty(connected->region().boundingRect());
        }
    }
}

void QVFbScreen::blank(bool on)
{
    d_ptr->blank = on;
    setBrightness(connected->d_ptr->brightness);
}

#endif // QT_NO_QWS_QVFB

QT_END_NAMESPACE