qprintengine_ps.cpp

奇趣公司比较新的qt/emd版本

        int format;
        out = ::compress(img, gray, &format);
        *currentPage << "/sl currentfile/ASCII85Decode filter"
                     << filters[format]
                     << size << " string readstring\n";
        ps_r7(*currentPage, out, out.size());
        *currentPage << " pop def\n";
        *currentPage << width << ' ' << height << "[" << scaleX << " 0 0 " << scaleY << " 0 0]sl "
                    << bits << (!mask.isNull() ? "mask " : "false ")
                    << x << ' ' << y << " di\n";
    }
}

void QPSPrintEnginePrivate::emitHeader(bool finished)
{
    QPSPrintEngine *q = static_cast<QPSPrintEngine *>(q_ptr);
    QPrinter *printer = static_cast<QPrinter*>(pdev);

    if (creator.isEmpty())
        creator = QLatin1String("Qt " QT_VERSION_STR);

    QByteArray header;
    QPdf::ByteStream s(&header);
    s << "%!PS-Adobe-1.0";

    qreal scale = 72. / ((qreal) q->metric(QPaintDevice::PdmDpiY));
    QRect pageRect = this->pageRect();
    QRect paperRect = this->paperRect();
    int mtop = pageRect.top() - paperRect.top();
    int mleft = pageRect.left() - paperRect.left();
    int mbottom = paperRect.bottom() - pageRect.bottom();
    int mright = paperRect.right() - pageRect.right();
    int width = pageRect.width();
    int height = pageRect.height();
    if (finished && pageCount == 1 && copies == 1 &&
        ((fullPage && qt_gen_epsf) || (outputFileName.endsWith(QLatin1String(".eps"))))
       ) {
        if (!boundingBox.isValid())
            boundingBox.setRect(0, 0, width, height);
        if (orientation == QPrinter::Landscape) {
            if (!fullPage)
                boundingBox.translate(-mleft, -mtop);
            s << " EPSF-3.0\n%%BoundingBox: "
              << (int)(printer->height() - boundingBox.bottom())*scale // llx
              << (int)(printer->width() - boundingBox.right())*scale - 1 // lly
              << (int)(printer->height() - boundingBox.top())*scale + 1 // urx
              << (int)(printer->width() - boundingBox.left())*scale; // ury
        } else {
            if (!fullPage)
                boundingBox.translate(mleft, -mtop);
            s << " EPSF-3.0\n%%BoundingBox: "
              << (int)(boundingBox.left())*scale
              << (int)(printer->height() - boundingBox.bottom())*scale - 1
              << (int)(boundingBox.right())*scale + 1
              << (int)(printer->height() - boundingBox.top())*scale;
        }
    } else {
        int w = width + (fullPage ? 0 : mleft + mright);
        int h = height + (fullPage ? 0 : mtop + mbottom);
        w = (int)(w*scale);
        h = (int)(h*scale);
        // set a bounding box according to the DSC
        if (orientation == QPrinter::Landscape)
            s << "\n%%BoundingBox: 0 0 " << h << w;
        else
            s << "\n%%BoundingBox: 0 0 " << w << h;
    }
    s << "\n" << wrapDSC("%%Creator: " + creator.toUtf8());
    if (!title.isEmpty())
        s << wrapDSC("%%Title: " + title.toUtf8());
#ifndef QT_NO_DATESTRING
    s << "%%CreationDate: " << QDateTime::currentDateTime().toString().toUtf8();
#endif
    s << "\n%%Orientation: ";
    if (orientation == QPrinter::Landscape)
        s << "Landscape";
    else
        s << "Portrait";

    s << "\n%%Pages: (atend)"
        "\n%%DocumentFonts: (atend)"
        "\n%%EndComments\n"

        "%%BeginProlog\n"
        "% Prolog copyright 1994-2006 Trolltech. You may copy this prolog in any way\n"
        "% that is directly related to this document. For other use of this prolog,\n"
        "% see your licensing agreement for Qt.\n"
      << ps_header << "\n";


    s << "/pageinit {\n";
    if (!fullPage) {
        if (orientation == QPrinter::Portrait)
            s << mleft*scale << mbottom*scale << "translate\n";
        else
            s << mtop*scale << mleft*scale << "translate\n";
    }
    if (orientation == QPrinter::Portrait) {
        s << "% " << printer->widthMM() << "*" << printer->heightMM()
          << "mm (portrait)\n0 " << height*scale
          << "translate " << scale << "-" << scale << "scale } def\n";
    } else {
        s << "% " << printer->heightMM() << "*" << printer->widthMM()
          << " mm (landscape)\n 90 rotate " << scale << "-" << scale << "scale } def\n";
    }
    s << "%%EndProlog\n";

    outDevice->write(header);
    headerDone = true;
}


void QPSPrintEnginePrivate::emitPages()
{
    if (!hugeDocument) {
        for (QHash<QFontEngine::FaceId, QFontSubset *>::const_iterator it = fonts.constBegin();
             it != fonts.constEnd(); ++it)
            outDevice->write((*it)->toType1());
    }

    outDevice->write(buffer);

    buffer = QByteArray();
    hugeDocument = true;
}


#ifdef Q_WS_QWS
static const int max_in_memory_size = 2000000;
#else
static const int max_in_memory_size = 32000000;
#endif

void QPSPrintEnginePrivate::flushPage(bool last)
{
    if (!last && currentPage->content().isEmpty())
        return;

    QPdf::ByteStream s(&buffer);
    s << "%%Page: "
      << pageCount << pageCount << "\n"
      << "%%BeginPageSetup\n"
      << "QI\n";
    if (hugeDocument) {
        for (QHash<QFontEngine::FaceId, QFontSubset *>::const_iterator it = fonts.constBegin();
             it != fonts.constEnd(); ++it) {
            if (currentPage->fonts.contains((*it)->object_id)) {
                if ((*it)->downloaded_glyphs == 0) {
                    s << (*it)->toType1();
                    (*it)->downloaded_glyphs = 0;
                } else {
                    s << (*it)->type1AddedGlyphs();
                }
            }
        }
    }
    for (int i = 0; i < currentPage->fonts.size(); ++i)
        s << "(F" << QByteArray::number(currentPage->fonts.at(i)) << ") T1Setup\n";

    s << "%%EndPageSetup\nq\n"
      << currentPage->content()
      << "\nQ QP\n";
    if (last || hugeDocument || buffer.size() > max_in_memory_size) {
//        qDebug("emiting header at page %d", pageCount);
        if (!headerDone)
            emitHeader(last);
        emitPages();
    }
    pageCount++;
}

// ================ PSPrinter class ========================

QPSPrintEngine::QPSPrintEngine(QPrinter::PrinterMode m)
    : QPdfBaseEngine(*(new QPSPrintEnginePrivate(m)),
                     PrimitiveTransform
                     | PatternTransform
                     | PixmapTransform
                     | PainterPaths
                     | PatternBrush
        )
{
}

static void ignoreSigPipe(bool b)
{
#ifndef QT_NO_LPR
    static struct sigaction *users_sigpipe_handler = 0;

    if (b) {
        if (users_sigpipe_handler != 0)
            return; // already ignoring sigpipe

        users_sigpipe_handler = new struct sigaction;
        struct sigaction tmp_sigpipe_handler;
        tmp_sigpipe_handler.sa_handler = SIG_IGN;
        sigemptyset(&tmp_sigpipe_handler.sa_mask);
        tmp_sigpipe_handler.sa_flags = 0;

        if (sigaction(SIGPIPE, &tmp_sigpipe_handler, users_sigpipe_handler) == -1) {
            delete users_sigpipe_handler;
            users_sigpipe_handler = 0;
        }
    }
    else {
        if (users_sigpipe_handler == 0)
            return; // not ignoring sigpipe

        if (sigaction(SIGPIPE, users_sigpipe_handler, 0) == -1)
            qWarning("QPSPrintEngine: Could not restore SIGPIPE handler");

        delete users_sigpipe_handler;
        users_sigpipe_handler = 0;
    }
#else
    Q_UNUSED(b);
#endif
}
QPSPrintEngine::~QPSPrintEngine()
{
    Q_D(QPSPrintEngine);
    if (d->fd >= 0)
#if defined(Q_OS_WIN) && defined(_MSC_VER) && _MSC_VER >= 1400
        ::_close(d->fd);
#else
        ::close(d->fd);
#endif
}

bool QPSPrintEngine::begin(QPaintDevice *pdev)
{
    Q_D(QPSPrintEngine);

    if (d->fd >= 0)
        return true;

    if(!QPdfBaseEngine::begin(pdev))
        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 = "";
    d->hugeDocument = false;

    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);

    QPdfBaseEngine::end();
    ignoreSigPipe(false);

    d->firstPage = true;
    d->headerDone = false;

    setActive(false);
    d->printerState = QPrinter::Idle;
    d->pdev = 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";
    if(!d->simplePen)
        *d->currentPage << QPdf::generateMatrix(d->stroker.matrix);
    QBrush b = d->brush;
    if (image.depth() == 1) {
        // 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 QPdfBaseEngine::newPage();
}

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

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

#endif // QT_NO_PRINTER