qprintengine_ps.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

                    pr.prepend(QLatin1String("-P"));
                (void)execlp(d->printProgram.toLocal8Bit().data(), d->printProgram.toLocal8Bit().data(),
                              pr.toLocal8Bit().data(), (char *)0);
            } else {
                // if no print program has been specified, be smart
                // about the option string too.
                QList<QByteArray> lprhack;
                QList<QByteArray> lphack;
                QByteArray media;
                if (!pr.isEmpty() || !d->selectionOption.isEmpty()) {
                    if (!d->selectionOption.isEmpty()) {
                        QStringList list = d->selectionOption.split(QChar(' '));
                        for (int i = 0; i < list.size(); ++i)
                            lprhack.append(list.at(i).toLocal8Bit());
                        lphack = lprhack;
                    } else {
                        lprhack.append("-P");
                        lphack.append("-d");
                    }
                    lprhack.append(pr.toLocal8Bit());
                    lphack.append(pr.toLocal8Bit());
                }
                char ** lpargs = new char *[lphack.size()+6];
                lpargs[0] = "lp";
                int i;
                for (i = 0; i < lphack.size(); ++i)
                    lpargs[i+1] = (char *)lphack.at(i).constData();
#ifndef Q_OS_OSF
                if (QPdf::paperSizeToString(d->pageSize)) {
                    lpargs[++i] = "-o";
                    lpargs[++i] = (char *)QPdf::paperSizeToString(d->pageSize);
                    lpargs[++i] = "-o";
                    media = "media=";
                    media += QPdf::paperSizeToString(d->pageSize);
                    lpargs[++i] = (char *)media.constData();
                }
#endif
                lpargs[++i] = 0;
                char **lprargs = new char *[lprhack.size()+2];
                lprargs[0] = "lpr";
                for (int i = 0; i < lprhack.size(); ++i)
                    lprargs[i+1] = (char *)lprhack[i].constData();
                lprargs[lprhack.size() + 1] = 0;
                (void)execvp("lp", lpargs);
                (void)execvp("lpr", lprargs);
                (void)execv("/bin/lp", lpargs);
                (void)execv("/bin/lpr", lprargs);
                (void)execv("/usr/bin/lp", lpargs);
                (void)execv("/usr/bin/lpr", lprargs);
            }
            // if we couldn't exec anything, close the fd,
            // wait for a second so the parent process (the
            // child of the GUI process) has exited.  then
            // exit.
            ::close(0);
            (void)::sleep(1);
            ::exit(0);
        }
        // parent process
        ::close(fds[0]);
        d->fd = fds[1];
    }
    if (d->fd < 0)
        return false;

    d->pageCount = 1;                // initialize state

    d->pen = QPen(Qt::black);
    d->brush = Qt::NoBrush;
    d->hasPen = true;
    d->hasBrush = false;
    d->clipEnabled = false;
    d->allClipped = false;
    d->boundingBox = QRect();
    d->fontsUsed = "";

    setActive(true);
    d->printerState = QPrinter::Active;

    newPage();

    return true;
}

bool QPSPrintEngine::end()
{
    Q_D(QPSPrintEngine);

    // we're writing to lp/lpr through a pipe, we don't want to crash with SIGPIPE
    // if lp/lpr dies
    ignoreSigPipe(true);
    d->flushPage(true);
    QByteArray trailer;
    QPdf::ByteStream s(&trailer);
    s << "%%Trailer\n";
    s << "%%Pages: " << d->pageCount - 1 << "\n" <<
        wrapDSC("%%DocumentFonts: " + d->fontsUsed);
    s << "%%EOF\n";
    d->outDevice->write(trailer);
    ignoreSigPipe(false);

    if (d->outDevice)
        d->outDevice->close();
    if (d->fd >= 0)
        ::close(d->fd);
    d->fd = -1;
    delete d->outDevice;
    d->outDevice = 0;

    qDeleteAll(d->fonts);
    d->fonts.clear();
    d->firstPage = true;

    setActive(false);
    d->printerState = QPrinter::Idle;
    d->pdev = 0;

    if (d->pid) {
        (void)::waitpid(d->pid, 0, 0);
        d->pid = 0;
    }
    
    return true;
}

void QPSPrintEngine::setBrush()
{
    Q_D(QPSPrintEngine);
#if 0
    bool specifyColor;
    int gStateObject = 0;
    int patternObject = d->addBrushPattern(brush, d->stroker.matrix, brushOrigin, &specifyColor, &gStateObject);

    *d->currentPage << (patternObject ? "/PCSp cs " : "/CSp cs ");
    if (specifyColor) {
        QColor rgba = brush.color();
        *d->currentPage << rgba.redF()
                        << rgba.greenF()
                        << rgba.blueF();
    }
    if (patternObject)
        *d->currentPage << "/Pat" << patternObject;
    *d->currentPage << "scn\n";
#endif
    QColor rgba = d->brush.color();
    *d->currentPage << rgba.redF()
                    << rgba.greenF()
                    << rgba.blueF()
                    << "scn\n";
    *d->currentPage << "/BSt " << d->brush.style() << "def\n";
}

void QPSPrintEngine::drawImageInternal(const QRectF &r, QImage image, bool bitmap)
{
    Q_D(QPSPrintEngine);
    if (d->clipEnabled && d->allClipped)
        return;
    if (bitmap && image.depth() != 1)
        bitmap = false;
    QImage mask;
    if (!bitmap) {
        if (image.format() == QImage::Format_Mono || image.format() == QImage::Format_MonoLSB)
            image = image.convertToFormat(QImage::Format_Indexed8);
        if (image.hasAlphaChannel()) {
            // get better alpha dithering
            int xscale = image.width();
            xscale *= xscale <= 800 ? 4 : (xscale <= 1600 ? 2 : 1);
            int yscale = image.height();
            yscale *= yscale <= 800 ? 4 : (yscale <= 1600 ? 2 : 1);
            image = image.scaled(xscale, yscale);
            mask = image.createAlphaMask(Qt::OrderedAlphaDither);
        }
    }
    *d->currentPage << "q\n" << QPdf::generateMatrix(d->stroker.matrix);
    QBrush b = d->brush;
    if (image.depth() == 1) {
        if (d->backgroundMode == Qt::OpaqueMode) {
            // draw background
            d->brush = d->backgroundBrush;
            setBrush();
            *d->currentPage << r.x() << r.y() << r.width() << r.height() << "re f\n";
        }
        // set current pen as brush
        d->brush = d->pen.brush();
        setBrush();
    }
    d->drawImage(r.x(), r.y(), r.width(), r.height(), image, mask);
    *d->currentPage << "Q\n";
    d->brush = b;
}


void QPSPrintEngine::drawImage(const QRectF &r, const QImage &img, const QRectF &sr,
                               Qt::ImageConversionFlags)
{
    QImage image = img.copy(sr.toRect());
    drawImageInternal(r, image, false);
}

void QPSPrintEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr)
{
    QImage img = pm.copy(sr.toRect()).toImage();
    drawImageInternal(r, img, true);
}

void QPSPrintEngine::drawTiledPixmap(const QRectF &r, const QPixmap &pixmap, const QPointF &p)
{
    Q_D(QPSPrintEngine);
    if (d->clipEnabled && d->allClipped)
        return;
    // ### Optimise implementation!
    qreal yPos = r.y();
    qreal yOff = p.y();
    while(yPos < r.y() + r.height()) {
        qreal drawH = pixmap.height() - yOff;    // Cropping first row
        if (yPos + drawH > r.y() + r.height())        // Cropping last row
            drawH = r.y() + r.height() - yPos;
        qreal xPos = r.x();
        qreal xOff = p.x();
        while(xPos < r.x() + r.width()) {
            qreal drawW = pixmap.width() - xOff; // Cropping first column
            if (xPos + drawW > r.x() + r.width())    // Cropping last column
                drawW = r.x() + r.width() - xPos;
            // ########
            painter()->drawPixmap(QPointF(xPos, yPos).toPoint(), pixmap,
                                   QRectF(xOff, yOff, drawW, drawH).toRect());
            xPos += drawW;
            xOff = 0;
        }
        yPos += drawH;
        yOff = 0;
    }

}

bool QPSPrintEngine::newPage()
{
    Q_D(QPSPrintEngine);
    // we're writing to lp/lpr through a pipe, we don't want to crash with SIGPIPE
    // if lp/lpr dies
    ignoreSigPipe(true);
    if (!d->firstPage)
        d->flushPage();
    d->firstPage = false;
    ignoreSigPipe(false);

    delete d->currentPage;
    d->currentPage = new QPdfPage;
    d->stroker.stream = d->currentPage;

    return true;
}

bool QPSPrintEngine::abort()
{
    // ### abort!?!
    return false;
}

QRect QPSPrintEnginePrivate::paperRect() const
{
    QPdf::PaperSize s = QPdf::paperSize(pageSize);
    int w = qRound(s.width*resolution/72.);
    int h = qRound(s.height*resolution/72.);
    if (orientation == QPrinter::Portrait)
        return QRect(0, 0, w, h);
    else
        return QRect(0, 0, h, w);
}

QRect QPSPrintEnginePrivate::pageRect() const
{
    QRect r = paperRect();
    if (fullPage)
        return r;
    // would be nice to get better margins than this.
    return QRect(resolution/3, resolution/3, r.width()-2*resolution/3, r.height()-2*resolution/3);
}

int  QPSPrintEngine::metric(QPaintDevice::PaintDeviceMetric metricType) const
{
    Q_D(const QPSPrintEngine);
    int val;
    QRect r = d->fullPage ? d->paperRect() : d->pageRect();
    switch (metricType) {
    case QPaintDevice::PdmWidth:
        val = r.width();
        break;
    case QPaintDevice::PdmHeight:
        val = r.height();
        break;
    case QPaintDevice::PdmDpiX:
        val = d->resolution;
        break;
    case QPaintDevice::PdmDpiY:
        val = d->resolution;
        break;
    case QPaintDevice::PdmPhysicalDpiX:
    case QPaintDevice::PdmPhysicalDpiY:
        val = 1200;
        break;
    case QPaintDevice::PdmWidthMM:
        val = qRound(r.width()*25.4/d->resolution);
        break;
    case QPaintDevice::PdmHeightMM:
        val = qRound(r.height()*25.4/d->resolution);
        break;
    case QPaintDevice::PdmNumColors:
        val = INT_MAX;
        break;
    case QPaintDevice::PdmDepth:
        val = 32;
        break;
    default:
        qWarning("QPrinter::metric: Invalid metric command");
        return 0;
    }
    return val;
}

QPrinter::PrinterState QPSPrintEngine::printerState() const
{
    Q_D(const QPSPrintEngine);
    return d->printerState;
}

void QPSPrintEngine::setProperty(PrintEnginePropertyKey key, const QVariant &value)
{
    Q_D(QPSPrintEngine);
    switch (key) {
    case PPK_CollateCopies:
        d->collate = value.toBool();
        break;
    case PPK_ColorMode:
        d->colorMode = QPrinter::ColorMode(value.toInt());
        break;
    case PPK_Creator:
        d->creator = value.toString();
        break;
    case PPK_DocumentName:
        d->title = value.toString();
        break;
    case PPK_FullPage:
        d->fullPage = value.toBool();
        break;
    case PPK_NumberOfCopies:
        d->copies = value.toInt();
        break;
    case PPK_Orientation:
        d->orientation = QPrinter::Orientation(value.toInt());
        break;
    case PPK_OutputFileName:
        d->outputFileName = value.toString();
        break;
    case PPK_PageOrder:
        d->pageOrder = QPrinter::PageOrder(value.toInt());
        break;
    case PPK_PageSize:
        d->pageSize = QPrinter::PageSize(value.toInt());
        break;
    case PPK_PaperSource:
        d->paperSource = QPrinter::PaperSource(value.toInt());
        break;
    case PPK_PrinterName:
        d->printerName = value.toString();
        break;
    case PPK_PrinterProgram:
        d->printProgram = value.toString();
        break;
    case PPK_Resolution:
        d->resolution = value.toInt();
        break;
    case PPK_SelectionOption:
        d->selectionOption = value.toString();
        break;
    case PPK_FontEmbedding:
        d->embedFonts = value.toBool();
        break;
    default:
        break;
    }
}

QVariant QPSPrintEngine::property(PrintEnginePropertyKey key) const
{
    Q_D(const QPSPrintEngine);
    QVariant ret;
    switch (key) {
    case PPK_CollateCopies:
        ret = d->collate;
        break;
    case PPK_ColorMode:
        ret = d->colorMode;
        break;
    case PPK_Creator:
        ret = d->creator;
        break;
    case PPK_DocumentName:
        ret = d->title;
        break;
    case PPK_FullPage:
        ret = d->fullPage;
        break;
    case PPK_NumberOfCopies:
        ret = d->copies;
        break;
    case PPK_Orientation:
        ret = d->orientation;
        break;
    case PPK_OutputFileName:
        ret = d->outputFileName;
        break;
    case PPK_PageOrder:
        ret = d->pageOrder;
        break;
    case PPK_PageSize:
        ret = d->pageSize;
        break;
    case PPK_PaperSource:
        ret = d->paperSource;
        break;
    case PPK_PrinterName:
        ret = d->printerName;
        break;
    case PPK_PrinterProgram:
        ret = d->printProgram;
        break;
    case PPK_Resolution:
        ret = d->resolution;
        break;
    case PPK_SupportedResolutions:
        ret = QList<QVariant>() << 72;
        break;
    case PPK_PaperRect:
        ret = d->paperRect();
        break;
    case PPK_PageRect:
        ret = d->pageRect();
        break;
    case PPK_SelectionOption:
        ret = d->selectionOption;
        break;
    case PPK_FontEmbedding:
        ret = d->embedFonts;
        break;
    default:
        break;
    }
    return ret;
}

#endif // QT_NO_PRINTER