qprintengine_qws.cpp

奇趣公司比较新的qt/emd版本

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#include <private/qprintengine_qws_p.h>

#ifndef QT_NO_PRINTER

#include <private/qpaintengine_raster_p.h>
#include <qimage.h>
#include <qfile.h>
#include <qdebug.h>
#include <QCopChannel>

#define MM(n) int((n * 720 + 127) / 254)
#define IN(n) int(n * 72)

struct PaperSize {
    int width, height;
};

static const PaperSize paperSizes[QPrinter::NPageSize] =
{
    {  MM(210), MM(297) },      // A4
    {  MM(176), MM(250) },      // B5
    {  IN(8.5), IN(11) },       // Letter
    {  IN(8.5), IN(14) },       // Legal
    {  IN(7.5), IN(10) },       // Executive
    {  MM(841), MM(1189) },     // A0
    {  MM(594), MM(841) },      // A1
    {  MM(420), MM(594) },      // A2
    {  MM(297), MM(420) },      // A3
    {  MM(148), MM(210) },      // A5
    {  MM(105), MM(148) },      // A6
    {  MM(74), MM(105)},        // A7
    {  MM(52), MM(74) },        // A8
    {  MM(37), MM(52) },        // A9
    {  MM(1000), MM(1414) },    // B0
    {  MM(707), MM(1000) },     // B1
    {  MM(31), MM(44) },        // B10
    {  MM(500), MM(707) },      // B2
    {  MM(353), MM(500) },      // B3
    {  MM(250), MM(353) },      // B4
    {  MM(125), MM(176) },      // B6
    {  MM(88), MM(125) },       // B7
    {  MM(62), MM(88) },        // B8
    {  MM(44), MM(62) },        // B9
    {  MM(162),    MM(229) },   // C5E
    {  IN(4.125),  IN(9.5) },   // Comm10E
    {  MM(110),    MM(220) },   // DLE
    {  IN(8.5),    IN(13) },    // Folio
    {  IN(17),     IN(11) },    // Ledger
    {  IN(11),     IN(17) }     // Tabloid
};

QtopiaPrintEngine::QtopiaPrintEngine(QPrinter::PrinterMode mode)
    : QPaintEngine(*(new QtopiaPrintEnginePrivate( mode )))
{
    d_func()->initialize();
}

bool QtopiaPrintEngine::begin(QPaintDevice *)
{
    Q_D(QtopiaPrintEngine);
    d->paintEngine->state = state;
    Q_ASSERT_X(d->printerState == QPrinter::Idle, "QtopiaPrintEngine", "printer already active");

    // Create a new off-screen monochrome image to handle the drawing process.
    QSize size = paperRect().size();
    if ( d->pageImage )
	delete d->pageImage;
    d->pageImage = new QImage( size, QImage::Format_RGB32 );
    if ( !(d->pageImage) )
	return false;

    // Begin the paint process on the image.
    if (!d->paintEngine->begin(d->pageImage))
        return false;

    // Clear the first page to all-white.
    clearPage();

    // Clear the print buffer and output the image header.
    d->buffer.clear();
    d->writeG3FaxHeader();

    // The print engine is currently active.
    d->printerState = QPrinter::Active;
    return true;
}

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

    d->paintEngine->end();

    // Flush the last page.
    flushPage();

    // Output the fax data to a file (TODO: send to the print queuing daemon).
    QString filename;
    if ( !d->outputFileName.isEmpty() )
        filename = QString(::getenv("HOME")) + "/Documents/" + d->outputFileName;
    else
        filename = QString(::getenv("HOME")) + "/tmp/" + "qwsfax.tiff";

    setProperty(QPrintEngine::PPK_OutputFileName, filename);
    QFile file( filename );
    if ( !file.open( QIODevice::WriteOnly | QIODevice::Truncate ) ) {
	qDebug( "Failed to open %s for printer output",
		filename.toLatin1().constData() );
    } else {
	file.write( d->buffer.data() );
	file.close();
    }

    // Free up the memory for the image buffer.
    d->buffer.clear();

    // Finalize the print job.
    d->printerState = QPrinter::Idle;

    // call qcop service
    QMap<QString, QVariant> map;
    for ( int x = 0; x <= QPrintEngine::PPK_Duplex; x++ )
        map.insert( QString::number(x), property((QPrintEngine::PrintEnginePropertyKey)(x)));
    QVariant variant(map);

    QByteArray data;
    QDataStream out(&data, QIODevice::WriteOnly);
    out << variant;
    QCopChannel::send("QPE/Service/Print", "print(QVariant)", data);

    return true;
}

QPaintEngine *QtopiaPrintEngine::paintEngine() const
{
    return d_func()->paintEngine;
}

void QtopiaPrintEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr)
{
    Q_D(QtopiaPrintEngine);
    Q_ASSERT(d->printerState == QPrinter::Active);
    d->paintEngine->drawPixmap(r, pm, sr);
}

void QtopiaPrintEngine::drawTextItem(const QPointF &p, const QTextItem &ti)
{
    Q_D(QtopiaPrintEngine);
    Q_ASSERT(d->printerState == QPrinter::Active);
    d->paintEngine->drawTextItem(p, ti);
}

void QtopiaPrintEngine::updateState(const QPaintEngineState &state)
{
    Q_D(QtopiaPrintEngine);
    d->paintEngine->updateState(state);
}

QRect QtopiaPrintEngine::paperRect() const
{
    PaperSize s = paperSizes[d_func()->pageSize];
    int w = qRound(s.width*d_func()->resolution/72.);
    int h = qRound(s.height*d_func()->resolution/72.);
    if (d_func()->orientation == QPrinter::Portrait)
        return QRect(0, 0, w, h);
    else
        return QRect(0, 0, h, w);
}

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

bool QtopiaPrintEngine::newPage()
{
    flushPage();
    clearPage();
    ++(d_func()->pageNumber);
    return true;
}

bool QtopiaPrintEngine::abort()
{
    return false;
}

QPrinter::PrinterState QtopiaPrintEngine::printerState() const
{
    return d_func()->printerState;
}

int QtopiaPrintEngine::metric(QPaintDevice::PaintDeviceMetric metricType) const
{
    int val;
    QRect r = d_func()->fullPage ? paperRect() : pageRect();
    switch (metricType) {
    case QPaintDevice::PdmWidth:
        val = r.width();
        break;
    case QPaintDevice::PdmHeight:
        val = r.height();
        break;
    case QPaintDevice::PdmDpiX:
        val = d_func()->resolution;
        break;
    case QPaintDevice::PdmDpiY:
        val = d_func()->resolution;
        break;
    case QPaintDevice::PdmPhysicalDpiX:
    case QPaintDevice::PdmPhysicalDpiY:
        val = QT_QWS_PRINTER_DEFAULT_DPI;
        break;
    case QPaintDevice::PdmWidthMM:
        val = qRound(r.width()*25.4/d_func()->resolution);
        break;
    case QPaintDevice::PdmHeightMM:
        val = qRound(r.height()*25.4/d_func()->resolution);
        break;
    case QPaintDevice::PdmNumColors:
        val = 2;
        break;
    case QPaintDevice::PdmDepth:
        val = 1;
        break;
    default:
        qWarning("QtopiaPrintEngine::metric: Invalid metric command");
        return 0;
    }
    return val;
}

QVariant QtopiaPrintEngine::property(PrintEnginePropertyKey key) const
{
    Q_D(const  QtopiaPrintEngine);
    QVariant ret;

    switch (key) {
    case PPK_CollateCopies:
        ret = d->collateCopies;
        break;
    case PPK_ColorMode:
        ret = d->colorMode;
        break;
    case PPK_Creator:
        ret = d->creator;
        break;
    case PPK_DocumentName:
        ret = d->docName;
        break;
    case PPK_FullPage:
        ret = d->fullPage;
        break;
    case PPK_NumberOfCopies:
        ret = d->numCopies;
        break;
    case PPK_Orientation:
        ret = d->orientation;
        break;
    case PPK_OutputFileName:
        ret = d->outputFileName;
        break;
    case PPK_PageOrder:
        ret = d->pageOrder;
        break;
    case PPK_PageRect:
        ret = pageRect();
        break;
    case PPK_PageSize:
        ret = d->pageSize;
        break;
    case PPK_PaperRect:
        ret = paperRect();
        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>() << QT_QWS_PRINTER_DEFAULT_DPI;
        break;
    default:
        break;
    }
    return ret;
}

void QtopiaPrintEngine::setProperty(PrintEnginePropertyKey key, const QVariant &value)
{
    Q_D(QtopiaPrintEngine);
    switch (key) {
    case PPK_CollateCopies:
        d->collateCopies = 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->docName = value.toString();
        break;
    case PPK_FullPage:
        d->fullPage = value.toBool();
        break;
    case PPK_NumberOfCopies:
        d->numCopies = 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());
    case PPK_PrinterName:
        d->printerName = value.toString();
        break;
    case PPK_PrinterProgram:
        d->printProgram = value.toString();
        break;
    case PPK_Resolution:
        d->resolution = value.toInt();
        break;
    default:
        break;
    }
}

void QtopiaPrintEngine::clearPage()
{
    d_func()->pageImage->fill(QColor(255, 255, 255).rgb());
}

void QtopiaPrintEngine::flushPage()
{
    d_func()->writeG3FaxPage();
}

QtopiaPrintEnginePrivate::~QtopiaPrintEnginePrivate()
{
    if ( pageImage )
	delete pageImage;
}

void QtopiaPrintEnginePrivate::initialize()
{
    paintEngine = new QRasterPaintEngine();
}

void QtopiaPrintEnginePrivate::writeG3FaxHeader()
{
    // Write the TIFF file magic number (little-endian TIFF).
    buffer.append( (char)'I' );
    buffer.append( (char)'I' );
    buffer.append( (char)42 );
    buffer.append( (char)0 );

    // Leave a place-holder for the IFD offset of the first page.
    ifdPatch = buffer.size();
    buffer.append( (int)0 );
}

// Tag values, from RFC 2301.
#define	TIFF_IFD_NEW_SUB_FILE_TYPE	254
#define	TIFF_IFD_IMAGE_WIDTH		256
#define	TIFF_IFD_IMAGE_LENGTH		257
#define	TIFF_IFD_BITS_PER_SAMPLE	258
#define	TIFF_IFD_COMPRESSION		259
#define	TIFF_IFD_PHOTOMETRIC_INTERP	262
#define	TIFF_IFD_FILL_ORDER		266
#define	TIFF_IFD_STRIP_OFFSETS		273
#define	TIFF_IFD_ORIENTATION		274
#define	TIFF_IFD_SAMPLES_PER_PIXEL	277
#define	TIFF_IFD_ROWS_PER_STRIP		278
#define	TIFF_IFD_STRIP_BYTE_COUNTS	279
#define	TIFF_IFD_X_RESOLUTION	    	282
#define	TIFF_IFD_Y_RESOLUTION	    	283
#define	TIFF_IFD_PLANAR_CONFIG		284
#define	TIFF_IFD_T4_OPTIONS		292
#define	TIFF_IFD_RESOLUTION_UNIT	296
#define	TIFF_IFD_PAGE_NUMBER	    	297
#define	TIFF_IFD_CLEAN_FAX_DATA		327

// IFD type values.
#define	TIFF_TYPE_SHORT			3
#define	TIFF_TYPE_LONG			4
#define	TIFF_TYPE_RATIONAL		5

// Construct a SHORT pair from two values.
#define	TIFF_SHORT_PAIR(a,b)		(((a) & 0xFFFF) | ((b) << 16))

// Width of a FAX page in pixels, in the baseline specification from RFC 2301.
// This must be hard-wired, as per the RFC.  We truncate any pixels that