qvfbview.cpp

Qt4.5 提供的qvfb,最新版本

                        *dest++ = qRgb(c, c, c);
                }
                ++src;
            }
            for (int i = 0; i < width8; ++i) {
                c = ((*src & 0x80) >> 7) * 0xff;
                *dest++ = qRgb(c, c, c);
                c = ((*src & 0x40) >> 6) * 0xff;
                *dest++ = qRgb(c, c, c);
                c = ((*src & 0x20) >> 5) * 0xff;
                *dest++ = qRgb(c, c, c);
                c = ((*src & 0x10) >> 4) * 0xff;
                *dest++ = qRgb(c, c, c);
                c = ((*src & 0x08) >> 3) * 0xff;
                *dest++ = qRgb(c, c, c);
                c = ((*src & 0x04) >> 2) * 0xff;
                *dest++ = qRgb(c, c, c);
                c = ((*src & 0x02) >> 1) * 0xff;
                *dest++ = qRgb(c, c, c);
                c = ((*src & 0x01)) * 0xff;
                *dest++ = qRgb(c, c, c);

                ++src;
            }
            if (doTail) {
                switch (tail) {
                case 7: c = ((*src & 0x02) >> 1) * 0xff;
                        dest[6] = qRgb(c, c, c);
                case 6: c = ((*src & 0x04) >> 2) * 0xff;
                        dest[5] = qRgb(c, c, c);
                case 5: c = ((*src & 0x08) >> 3) * 0xff;
                        dest[4] = qRgb(c, c, c);
                case 4: c = ((*src & 0x10) >> 4) * 0xff;
                        dest[3] = qRgb(c, c, c);
                case 3: c = ((*src & 0x20) >> 5) * 0xff;
                        dest[2] = qRgb(c, c, c);
                case 2: c = ((*src & 0x40) >> 6) * 0xff;
                        dest[1] = qRgb(c, c, c);
                case 1: c = ((*src & 0x80) >> 7) * 0xff;
                        dest[0] = qRgb(c, c, c);
                }
            }
            src += stride;
        }
        break;
    }
    case 4: {
        if (requiredSize > buffer.size())
            buffer.resize(requiredSize);

        // XXX: hw: replace by drawhelper functionality

        const int pixelsPerByte = 2;
        const int doAlign = r.x() & 1;
        const int doTail = (r.width() - doAlign) & 1;
        const int width8 = (r.width() - doAlign) / pixelsPerByte;

        uchar *b = reinterpret_cast<uchar*>(buffer.data());
	img = QImage(b, r.width(), r.height(), QImage::Format_RGB32);
	for (int y = 0; y < r.height(); ++y) {
            const quint8 *sptr = mView->data()
                                 + (r.y() + y) * mView->linestep()
                                 + r.x() / pixelsPerByte;
            quint32 *dptr = reinterpret_cast<quint32*>(img.scanLine(y));

            if (doAlign) {
                quint8 c = (*sptr++ & 0x0f);
                c |= (c << 4);
                *dptr++ = qRgb(c, c, c);
            }

            for (int i = 0; i < width8; ++i) {
                quint8 c1 = (*sptr >> 4);
                quint8 c2 = (*sptr & 0x0f);
                c1 |= (c1 << 4);
                c2 |= (c2 << 4);
		*dptr++ = qRgb(c1, c1, c1);
		*dptr++ = qRgb(c2, c2, c2);
                ++sptr;
	    }

            if (doTail) {
                quint8 c = *sptr >> 4;
                c |= (c << 4);
                *dptr = qRgb(c, c, c);
            }
	}
        break;
    }
    case 12:
	img = QImage((const uchar*)(mView->data() + r.y() * mView->linestep() + r.x() * 2),
                     r.width(), r.height(), mView->linestep(),
                     QImage::Format_RGB444);
        break;
    case 15:
	img = QImage((const uchar*)(mView->data() + r.y() * mView->linestep() + r.x() * 2),
                     r.width(), r.height(), mView->linestep(),
                     QImage::Format_RGB555);
        break;
    case 16:
	img = QImage((const uchar*)(mView->data() + r.y() * mView->linestep() + r.x() * 2),
                     r.width(), r.height(), mView->linestep(),
                     QImage::Format_RGB16);
        break;
    case 18:
	img = QImage((const uchar*)(mView->data() + r.y() * mView->linestep() + r.x() * 3),
                     r.width(), r.height(), mView->linestep(),
                     QImage::Format_RGB666);
        break;
    case 24:
	img = QImage((const uchar*)(mView->data() + r.y() * mView->linestep() + r.x() * 3),
                      r.width(), r.height(), mView->linestep(),
                     QImage::Format_RGB888);
        break;
    case 32:
	img = QImage((const uchar*)(mView->data() + r.y() * mView->linestep() + r.x() * 4),
                     r.width(), r.height(), mView->linestep(),
                     viewFormat == ARGBFormat ? QImage::Format_ARGB32_Premultiplied : QImage::Format_RGB32);
        break;
    case 8:
        img = QImage(mView->data() + r.y() * mView->linestep() + r.x(),
                   r.width(), r.height(), mView->linestep(),
                   QImage::Format_Indexed8);
        img.setColorTable(mView->clut());
        if (img.numColors() <= 0)
            img = QImage();
        break;
    }

    if ( brightness != 255 ) {
        if (img.format() == QImage::Format_Indexed8) {
            QVector<QRgb> c = img.colorTable();
            dim(c.data(),c.count(),brightness);
            img.setColorTable(c);
        } else {
            if ( img.format() != QImage::Format_ARGB32_Premultiplied )
                img = img.convertToFormat(QImage::Format_RGB32);

            // NOTE: calling bits() may change numBytes(), so do not
            // pass them as parameters (which are evaluated right-to-left).
            QRgb *b = (QRgb*)img.bits();
            int n = img.numBytes()/4;
            dim(b,n,brightness);
        }
    }

    return img;
}

static int findMultiple(int start, double m, int limit, int step)
{
    int r = start;
    while (r != limit) {
	if (int(int(r * m)/m) == r)
	    break;
	r += step;
    }
    return r;
}

void QVFbView::drawScreen(const QRect &rect)
{
    QRect r = QRect(0, 0, mView->width(), mView->height());

    if (hzm == 1.0 && vzm == 1.0) // hw: workaround for 4.3.1
        r &= rect;

    if (int(hzm) != hzm || int(vzm) != vzm) {
        r.setLeft(findMultiple(r.left(),hzm,0,-1));
        r.setTop(findMultiple(r.top(),vzm,0,-1));
        int w = findMultiple(r.width(),hzm,mView->width(),1);
        int h = findMultiple(r.height(),vzm,mView->height(),1);
        r.setRight(r.left()+w-1);
        r.setBottom(r.top()+h-1);
    }

    int leading;
    const QImage img = getBuffer(r, leading);

    QPixmap pm;
    if (hzm == 1.0 && vzm == 1.0) {
        pm = QPixmap::fromImage(img);
    } else if (emulateLcdScreen && hzm == 3.0 && vzm == 3.0) {
        QImage img2(img.width()*3, img.height(), QImage::Format_RGB32);
        for (int row = 0; row < img2.height(); row++) {
            QRgb *dptr = (QRgb*)img2.scanLine(row);
            QRgb *sptr = (QRgb*)img.scanLine(row);
            for (int col = 0; col < img.width(); col++) {
                QRgb s = *sptr++;
                *dptr++ = qRgb(qRed(s),0,0);
                *dptr++ = qRgb(0,qGreen(s),0);
                *dptr++ = qRgb(0,0,qBlue(s));
            }
        }
        QMatrix m;
        m.scale(1.0, 3.0);
        pm = QPixmap::fromImage(img2);
        pm = pm.transformed(m);
    } else if (int(hzm) == hzm && int(vzm) == vzm) {
        QMatrix m;
        m.scale(hzm,vzm);
        pm = QPixmap::fromImage(img);
        pm = pm.transformed(m);
    } else {
        pm = QPixmap::fromImage(img.scaled(int(img.width()*hzm),int(img.height()*vzm), Qt::IgnoreAspectRatio, Qt::SmoothTransformation));
    }

    int x1 = r.x();
    int y1 = r.y();
    int leadingX = leading;
    int leadingY = 0;

    // Do the rotation thing
    int rotX1 = mView->width() - x1 - img.width();
    int rotY1 = mView->height() - y1 - img.height();
    int rotLeadingX = (leading) ? mView->width() - leadingX - img.width() : 0;
    int rotLeadingY = 0;
    switch (rotation) {
    case Rot0:
        break;
    case Rot90:
        leadingY = leadingX;
        leadingX = rotLeadingY;
        y1 = x1;
        x1 = rotY1;
        break;
    case Rot180:
        leadingX = rotLeadingX;
        leadingY = leadingY;
        x1 = rotX1;
        y1 = rotY1;
        break;
    case Rot270:
        leadingX = leadingY;
        leadingY = rotLeadingX;
        x1 = y1;
        y1 = rotX1;
        break;
    default:
        break;
    }
    x1 = int(x1*hzm);
    y1 = int(y1*vzm);
    leadingX = int(leadingX*hzm);
    leadingY = int(leadingY*vzm);
    if (rotation != 0) {
        QMatrix m;
        m.rotate(rotation * 90.0);
        pm = pm.transformed(m);
    }

    QPainter p(this);
    if (viewFormat == ARGBFormat) {
        QPixmap bg(":/res/images/logo-nt.png");
        p.fillRect(x1,y1,pm.width(), pm.height(), QBrush(bg));
    }
    p.drawPixmap(x1, y1, pm, leadingX, leadingY, pm.width(), pm.height());
}

//bool QVFbView::eventFilter(QObject *obj, QEvent *e)
//{
//    if (obj == this &&
//	 (e->type() == QEvent::FocusIn || e->type() == QEvent::FocusOut))
//	return true;
//
//    return QWidgetView::eventFilter(obj, e);
//}

void QVFbView::paintEvent(QPaintEvent *e)
{
    drawScreen(mapToDevice(e->rect(),QSize(int(width()/hzm), int(height()/vzm)),rotation));
}

void QVFbView::mousePressEvent(QMouseEvent *e)
{
    sendMouseData(QPoint(int(e->x()/hzm),int(e->y()/vzm)), e->buttons(), 0);
}

void QVFbView::contextMenuEvent(QContextMenuEvent*)
{

}

void QVFbView::mouseDoubleClickEvent(QMouseEvent *e)
{
    sendMouseData(QPoint(int(e->x()/hzm),int(e->y()/vzm)), e->buttons(), 0);
}

void QVFbView::mouseReleaseEvent(QMouseEvent *e)
{
    sendMouseData(QPoint(int(e->x()/hzm),int(e->y()/vzm)), e->buttons(), 0);
}

void QVFbView::skinMouseEvent(QMouseEvent *e)
{
    sendMouseData(QPoint(int(e->x()/hzm),int(e->y()/vzm)), e->buttons(), 0);
}

void QVFbView::mouseMoveEvent(QMouseEvent *e)
{
    if (!emulateTouchscreen || (e->buttons() & Qt::MouseButtonMask))
	sendMouseData(QPoint(int(e->x()/hzm),int(e->y()/vzm)), e->buttons(), 0);
}

void QVFbView::wheelEvent(QWheelEvent *e)
{
    if (!e)
        return;
    sendMouseData(QPoint(int(e->x()/hzm),int(e->y()/vzm)), e->buttons(), e->delta());
}

void QVFbView::setTouchscreenEmulation(bool b)
{
    emulateTouchscreen = b;
}

void QVFbView::setLcdScreenEmulation(bool b)
{
    emulateLcdScreen = b;
}

void QVFbView::setViewFormat(PixelFormat f)
{
    if (viewFormat == f)
        return;
    viewFormat = f;
    setAttribute(Qt::WA_PaintOnScreen, viewFormat != ARGBFormat);
}

#ifdef Q_WS_X11
void QVFbView::embedDisplay(WId windowId)
{
    if (windowId == 0) {
        delete embedContainer;
        embedContainer = 0;
        return;
    }

    if (!embedContainer) {
        embedContainer = new QX11EmbedContainer(this);
        embedContainer->setGeometry(rect());
        embedContainer->show();
    }
    embedContainer->embedClient(windowId);
}
#endif

bool QVFbView::event(QEvent *e)
{
    if (e->type() == QEvent::KeyPress || e->type() == QEvent::KeyRelease) {
        QKeyEvent *ke = static_cast<QKeyEvent*>(e);
        sendKeyboardData(ke->text(), ke->key(),
		     ke->modifiers()&(Qt::ShiftModifier|Qt::ControlModifier|Qt::AltModifier),
                         ke->type() == QEvent::KeyPress, ke->isAutoRepeat());
        ke->accept();
        return true;
    }
    return QVFbAbstractView::event(e);
}

void QVFbView::keyPressEvent(QKeyEvent *e)
{
    sendKeyboardData(e->text(), e->key(),
		     e->modifiers()&(Qt::ShiftModifier|Qt::ControlModifier|Qt::AltModifier),
		     true, e->isAutoRepeat());
}

void QVFbView::keyReleaseEvent(QKeyEvent *e)
{
    sendKeyboardData(e->text(), e->key(),
		     e->modifiers()&(Qt::ShiftModifier|Qt::ControlModifier|Qt::AltModifier),
		     false, e->isAutoRepeat());
}


QImage QVFbView::image() const
{
    int l;
    QImage r = getBuffer(QRect(0, 0, mView->width(), mView->height()), l).copy();
    return r;
}

void QVFbView::startAnimation(const QString& filename)
{
    delete animation;
    animation = new QAnimationWriter(filename,"MNG");
    animation->setFrameRate(refreshRate);
    animation->appendFrame(QImage(mView->data(),
                                  mView->width(), mView->height(), QImage::Format_RGB32));
}

void QVFbView::stopAnimation()
{
    delete animation;
    animation = 0;
}


void QVFbView::skinKeyPressEvent(int code, const QString& text, bool autorep)
{
    QKeyEvent e(QEvent::KeyPress,code,0,text,autorep);
    keyPressEvent(&e);
}

void QVFbView::skinKeyReleaseEvent(int code, const QString& text, bool autorep)
{
    QKeyEvent e(QEvent::KeyRelease,code,0,text,autorep);
    keyReleaseEvent(&e);
}

QT_END_NAMESPACE