QPSPrintEngine Class Reference

#include <qprintengine_ps_p.h>

Inheritance diagram for QPSPrintEngine:

Public Functions
virtual bool	abort ()
	Instructs the print engine to abort the printing process. More...
virtual bool	begin (QPaintDevice *pdev)
	Reimplement this function to initialise your paint engine when painting is to start on the paint device pdev. More...
virtual void	drawImage (const QRectF &r, const QImage &img, const QRectF &sr, Qt::ImageConversionFlags)
	Reimplement this function to draw the part of the image specified by the sr rectangle in the given rectangle using the given conversion flags flags, to convert it to a pixmap. More...
virtual void	drawImageInternal (const QRectF &r, QImage img, bool bitmap)
virtual void	drawPixmap (const QRectF &r, const QPixmap &pm, const QRectF &sr)
	Reimplement this function to draw the part of the pm specified by the sr rectangle in the given r. More...
virtual void	drawTiledPixmap (const QRectF &r, const QPixmap &pixmap, const QPointF &s)
	Reimplement this function to draw the pixmap in the given rect, starting at the given p. More...
virtual bool	end ()
	Reimplement this function to finish painting on the current paint device. More...
virtual Qt::HANDLE	handle () const
virtual bool	newPage ()
	Instructs the print engine to start a new page. More...
virtual QPrinter::PrinterState	printerState () const
	Returns the current state of the printer being used by the print engine. More...
	QPSPrintEngine (QPrinter::PrinterMode m)
void	setBrush ()
virtual QPaintEngine::Type	type () const
	Reimplement this function to return the paint engine Type. More...
	~QPSPrintEngine ()
Public Functions inherited from QPdfBaseEngine
void	drawLines (const QLineF *lines, int lineCount)
	The default implementation splits the list of lines in lines into lineCount separate calls to drawPath() or drawPolygon() depending on the feature set of the paint engine. More...
void	drawPath (const QPainterPath &path)
	The default implementation ignores the path and does nothing. More...
void	drawPoints (const QPointF *points, int pointCount)
	Draws the first pointCount points in the buffer points. More...
void	drawPolygon (const QPointF *points, int pointCount, PolygonDrawMode mode)
	Reimplement this virtual function to draw the polygon defined by the pointCount first points in points, using mode mode. More...
void	drawRects (const QRectF *rects, int rectCount)
	Draws the first rectCount rectangles in the buffer rects. More...
void	drawTextItem (const QPointF &p, const QTextItem &textItem)
	This function draws the text item textItem at position p. More...
int	metric (QPaintDevice::PaintDeviceMetric metricType) const
	Returns the metric for the given id. More...
QVariant	property (PrintEnginePropertyKey key) const
	Returns the print engine's property specified by key. More...
	QPdfBaseEngine (QPdfBaseEnginePrivate &d, PaintEngineFeatures f)
void	setPen ()
void	setProperty (PrintEnginePropertyKey key, const QVariant &value)
	Sets the print engine's property specified by key to the given value. More...
void	setupGraphicsState (QPaintEngine::DirtyFlags flags)
void	updateState (const QPaintEngineState &state)
	Reimplement this function to update the state of a paint engine. More...
	~QPdfBaseEngine ()
Public Functions inherited from QAlphaPaintEngine
virtual void	drawImage (const QRectF &r, const QImage &image, const QRectF &sr)
	~QAlphaPaintEngine ()
Public Functions inherited from QPaintEngine
void	clearDirty (DirtyFlags df)
virtual QPoint	coordinateOffset () const
	Returns the offset from the painters origo to the engines origo. More...
virtual void	drawEllipse (const QRectF &r)
	Reimplement this function to draw the largest ellipse that can be contained within rectangle rect. More...
virtual void	drawEllipse (const QRect &r)
	The default implementation of this function calls the floating point version of this function. More...
virtual void	drawLines (const QLine *lines, int lineCount)
	The default implementation converts the first lineCount lines in lines to a QLineF and calls the floating point version of this function. More...
virtual void	drawPoints (const QPoint *points, int pointCount)
	Draws the first pointCount points in the buffer points. More...
virtual void	drawPolygon (const QPoint *points, int pointCount, PolygonDrawMode mode)
	Reimplement this virtual function to draw the polygon defined by the pointCount first points in points, using mode mode. More...
virtual void	drawRects (const QRect *rects, int rectCount)
	The default implementation converts the first rectCount rectangles in the buffer rects to a QRectF and calls the floating point version of this function. More...
void	fix_neg_rect (int *x, int *y, int *w, int *h)
virtual HDC	getDC () const
	Empty default implementation. More...
bool	hasFeature (PaintEngineFeatures feature) const
	Returns true if the paint engine supports the specified feature; otherwise returns false. More...
bool	isActive () const
	Returns true if the paint engine is actively drawing; otherwise returns false. More...
bool	isExtended () const
	Returns true if the paint engine is a QPaintEngineEx derivative. More...
QPaintDevice *	paintDevice () const
	Returns the device that this engine is painting on, if painting is active; otherwise returns 0. More...
QPainter *	painter () const
	Returns the paint engine's painter. More...
	QPaintEngine (PaintEngineFeatures features=0)
	Creates a paint engine with the featureset specified by caps. More...
virtual void	releaseDC (HDC hdc) const
	Empty default implementation. More...
void	setActive (bool newState)
	Sets the active state of the paint engine to state. More...
void	setDirty (DirtyFlags df)
void	setPaintDevice (QPaintDevice *device)
void	setSystemClip (const QRegion &baseClip)
	Sets the system clip for this engine. More...
void	setSystemRect (const QRect &rect)
	Sets the target rect for drawing within the backing store. More...
void	syncState ()
	Updates all dirty states in this engine. More...
QRegion	systemClip () const
	Returns the system clip. More...
QRect	systemRect () const
	Retrieves the rect for drawing within the backing store. More...
bool	testDirty (DirtyFlags df)
virtual	~QPaintEngine ()
	Destroys the paint engine. More...
Public Functions inherited from QPrintEngine
virtual HDC	getPrinterDC () const
virtual void	releasePrinterDC (HDC) const
virtual	~QPrintEngine ()
	Destroys the print engine. More...

Additional Inherited Members
Public Types inherited from QPaintEngine
enum	DirtyFlag {   DirtyPen = 0x0001, DirtyBrush = 0x0002, DirtyBrushOrigin = 0x0004, DirtyFont = 0x0008,   DirtyBackground = 0x0010, DirtyBackgroundMode = 0x0020, DirtyTransform = 0x0040, DirtyClipRegion = 0x0080,   DirtyClipPath = 0x0100, DirtyHints = 0x0200, DirtyCompositionMode = 0x0400, DirtyClipEnabled = 0x0800,   DirtyOpacity = 0x1000, AllDirty = 0xffff }
	QPaintEngine::updateState(). More...
enum	PaintEngineFeature {   PrimitiveTransform = 0x00000001, PatternTransform = 0x00000002, PixmapTransform = 0x00000004, PatternBrush = 0x00000008,   LinearGradientFill = 0x00000010, RadialGradientFill = 0x00000020, ConicalGradientFill = 0x00000040, AlphaBlend = 0x00000080,   PorterDuff = 0x00000100, PainterPaths = 0x00000200, Antialiasing = 0x00000400, BrushStroke = 0x00000800,   ConstantOpacity = 0x00001000, MaskedBrush = 0x00002000, PerspectiveTransform = 0x00004000, BlendModes = 0x00008000,   ObjectBoundingModeGradients = 0x00010000, RasterOpModes = 0x00020000, PaintOutsidePaintEvent = 0x20000000, AllFeatures = 0xffffffff }
	This enum is used to describe the features or capabilities that the paint engine has. More...
enum	PolygonDrawMode { OddEvenMode, WindingMode, ConvexMode, PolylineMode }
enum	Type {   X11, Windows, QuickDraw, CoreGraphics,   MacPrinter, QWindowSystem, PostScript, OpenGL,   Picture, SVG, Raster, Direct3D,   Pdf, OpenVG, OpenGL2, PaintBuffer,   Blitter, User = 50, MaxUser = 100 }
Public Types inherited from QPrintEngine
enum	PrintEnginePropertyKey {   PPK_CollateCopies, PPK_ColorMode, PPK_Creator, PPK_DocumentName,   PPK_FullPage, PPK_NumberOfCopies, PPK_Orientation, PPK_OutputFileName,   PPK_PageOrder, PPK_PageRect, PPK_PageSize, PPK_PaperRect,   PPK_PaperSource, PPK_PrinterName, PPK_PrinterProgram, PPK_Resolution,   PPK_SelectionOption, PPK_SupportedResolutions, PPK_WindowsPageSize, PPK_FontEmbedding,   PPK_SuppressSystemPrintStatus, PPK_Duplex, PPK_PaperSources, PPK_CustomPaperSize,   PPK_PageMargins, PPK_CopyCount, PPK_SupportsMultipleCopies, PPK_PaperSize = PPK_PageSize,   PPK_CustomBase = 0xff00 }
	This enum is used to communicate properties between the print engine and QPrinter. More...
Protected Functions inherited from QAlphaPaintEngine
QRegion	alphaClipping () const
void	cleanUp ()
bool	continueCall () const
void	flushAndInit (bool init=true)
	QAlphaPaintEngine (QAlphaPaintEnginePrivate &data, PaintEngineFeatures devcaps=0)
Protected Functions inherited from QPaintEngine
	QPaintEngine (QPaintEnginePrivate &data, PaintEngineFeatures devcaps=0)
Protected Variables inherited from QPaintEngine
uint	active: 1
QScopedPointer< QPaintEnginePrivate >	d_ptr
uint	extended: 1
PaintEngineFeatures	gccaps
uint	selfDestruct: 1
QPaintEngineState *	state

Detailed Description

Definition at line 71 of file qprintengine_ps_p.h.

Constructors and Destructors

QPSPrintEngine()

QPSPrintEngine::QPSPrintEngine ( QPrinter::PrinterMode  m )

explicit

Definition at line 660 of file qprintengine_ps.cpp.

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

~QPSPrintEngine()

QPSPrintEngine::~QPSPrintEngine

(

)

Definition at line 716 of file qprintengine_ps.cpp.

{
    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
}

Functions

abort()

bool QPSPrintEngine::abort ( )

virtual

Instructs the print engine to abort the printing process.

Returns true if successful; otherwise returns false.

Implements QPrintEngine.

Definition at line 958 of file qprintengine_ps.cpp.

Referenced by type().

{
    // ### abort!?!
    return false;
}

begin()

bool QPSPrintEngine::begin ( QPaintDevice *  pdev )

virtual

Reimplement this function to initialise your paint engine when painting is to start on the paint device pdev.

Return true if the initialization was successful; otherwise return false.

See also

end() isActive()

Reimplemented from QPdfBaseEngine.

Definition at line 727 of file qprintengine_ps.cpp.

{
    Q_D(QPSPrintEngine);

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

    if (d->useAlphaEngine) {
        QAlphaPaintEngine::begin(pdev);
        if (!continueCall())
            return true;
    }

    if(!QPdfBaseEngine::begin(pdev)) {
        d->printerState = QPrinter::Error;
        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;
    d->simplePen = false;

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

    newPage();

    return true;
}

drawImage()

void QPSPrintEngine::drawImage ( const QRectF &  r, const QImage &  pm, const QRectF &  sr, Qt::ImageConversionFlags  flags  )

virtual

Reimplement this function to draw the part of the image specified by the sr rectangle in the given rectangle using the given conversion flags flags, to convert it to a pixmap.

Reimplemented from QPaintEngine.

Definition at line 871 of file qprintengine_ps.cpp.

{
    Q_D(QPSPrintEngine);

    if (d->useAlphaEngine) {
        QAlphaPaintEngine::drawImage(r, img, sr);
        if (!continueCall())
            return;
    }
    QImage image = img.copy(sr.toRect());
    drawImageInternal(r, image, false);
}

drawImageInternal()

void QPSPrintEngine::drawImageInternal ( const QRectF &  r, QImage  img, bool  bitmap  )

virtual

Definition at line 833 of file qprintengine_ps.cpp.

Referenced by drawImage(), and drawPixmap().

{
    Q_D(QPSPrintEngine);
    if (d->clipEnabled && d->allClipped)
        return;
    if (bitmap && image.depth() != 1)
        bitmap = false;
    QImage mask;
    // the below is not necessary since it's handled by the alpha
    // engine
    if (!d->useAlphaEngine && !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;
}

drawPixmap()

void QPSPrintEngine::drawPixmap ( const QRectF &  r, const QPixmap &  pm, const QRectF &  sr  )

virtual

Reimplement this function to draw the part of the pm specified by the sr rectangle in the given r.

Reimplemented from QAlphaPaintEngine.

Definition at line 885 of file qprintengine_ps.cpp.

{
    Q_D(QPSPrintEngine);

    if (d->useAlphaEngine) {
        QAlphaPaintEngine::drawPixmap(r, pm, sr);
        if (!continueCall())
            return;
    }

    QImage img = pm.copy(sr.toRect()).toImage();
    drawImageInternal(r, img, true);
}

drawTiledPixmap()

void QPSPrintEngine::drawTiledPixmap ( const QRectF &  rect, const QPixmap &  pixmap, const QPointF &  p  )

virtual

Reimplement this function to draw the pixmap in the given rect, starting at the given p.

The pixmap will be drawn repeatedly until the rect is filled.

Reimplemented from QAlphaPaintEngine.

Definition at line 899 of file qprintengine_ps.cpp.

{
    Q_D(QPSPrintEngine);

    if (d->useAlphaEngine) {
        QAlphaPaintEngine::drawTiledPixmap(r, pixmap, p);
        if (!continueCall())
            return;
    }

    if (d->clipEnabled && d->allClipped)
        return;
    // ### Optimize 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;
    }

}

end()

bool QPSPrintEngine::end ( )

virtual

Reimplement this function to finish painting on the current paint device.

Return true if painting was finished successfully; otherwise return false.

See also

begin() isActive()

Reimplemented from QPdfBaseEngine.

Definition at line 766 of file qprintengine_ps.cpp.

{
    Q_D(QPSPrintEngine);

    if (d->useAlphaEngine) {
        QAlphaPaintEngine::end();
        if (!continueCall())
            return true;
    }

    // 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"
         "%%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;
}

handle()

virtual Qt::HANDLE QPSPrintEngine::handle ( ) const

inlinevirtual

Definition at line 98 of file qprintengine_ps_p.h.

{ return 0; }

newPage()

bool QPSPrintEngine::newPage ( )

virtual

Instructs the print engine to start a new page.

Returns true if the printer was able to create the new page; otherwise returns false.

Reimplemented from QPdfBaseEngine.

Definition at line 936 of file qprintengine_ps.cpp.

Referenced by begin(), and type().

{
    Q_D(QPSPrintEngine);

    if (!d->firstPage && d->useAlphaEngine)
        flushAndInit();

    // 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();
}

printerState()

QPrinter::PrinterState QPSPrintEngine::printerState ( ) const

virtual

Returns the current state of the printer being used by the print engine.

Implements QPrintEngine.

Definition at line 964 of file qprintengine_ps.cpp.

Referenced by type().

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

setBrush()

void QPSPrintEngine::setBrush ( )

virtual

Implements QPdfBaseEngine.

Definition at line 801 of file qprintengine_ps.cpp.

Referenced by drawImageInternal().

{
    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();
    if (d->colorMode == QPrinter::GrayScale) {
        qreal gray = qGray(rgba.rgba())/255.;
        *d->currentPage << gray << gray << gray;
    } else {
        *d->currentPage << rgba.redF()
                        << rgba.greenF()
                        << rgba.blueF();
    }
    *d->currentPage << "scn\n"
                    << "/BSt " << d->brush.style() << "def\n";
}

type()

virtual QPaintEngine::Type QPSPrintEngine::type ( ) const

inlinevirtual

Reimplement this function to return the paint engine Type.

Implements QPaintEngine.

Definition at line 91 of file qprintengine_ps_p.h.

{ return QPaintEngine::PostScript; }

---

The documentation for this class was generated from the following files:

• /src/gui/painting/qprintengine_ps_p.h
• /src/gui/painting/qprintengine_ps.cpp