QPicturePaintEngine Class Reference

#include <qpaintengine_pic_p.h>

Inheritance diagram for QPicturePaintEngine:

Public Functions
bool	begin (QPaintDevice *pdev)
	Reimplement this function to initialise your paint engine when painting is to start on the paint device pdev. More...
void	drawEllipse (const QRectF &rect)
	Reimplement this function to draw the largest ellipse that can be contained within rectangle rect. More...
void	drawImage (const QRectF &r, const QImage &image, const QRectF &sr, Qt::ImageConversionFlags flags=Qt::AutoColor)
	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...
void	drawPath (const QPainterPath &path)
	The default implementation ignores the path and does nothing. More...
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...
void	drawPolygon (const QPointF *points, int numPoints, PolygonDrawMode mode)
	Reimplement this virtual function to draw the polygon defined by the pointCount first points in points, using mode mode. More...
void	drawTextItem (const QPointF &p, const QTextItem &ti)
	This function draws the text item textItem at position p. More...
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...
bool	end ()
	Reimplement this function to finish painting on the current paint device. More...
	QPicturePaintEngine ()
Type	type () const
	Reimplement this function to return the paint engine Type. More...
void	updateBackground (Qt::BGMode bgmode, const QBrush &bgBrush)
void	updateBrush (const QBrush &brush)
void	updateBrushOrigin (const QPointF &origin)
void	updateClipEnabled (bool enabled)
void	updateClipPath (const QPainterPath &path, Qt::ClipOperation op)
void	updateClipRegion (const QRegion &region, Qt::ClipOperation op)
void	updateCompositionMode (QPainter::CompositionMode cmode)
void	updateFont (const QFont &font)
void	updateMatrix (const QTransform &matrix)
void	updateOpacity (qreal opacity)
void	updatePen (const QPen &pen)
void	updateRenderHints (QPainter::RenderHints hints)
void	updateState (const QPaintEngineState &state)
	Reimplement this function to update the state of a paint engine. More...
	~QPicturePaintEngine ()
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 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	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...
virtual void	drawPoints (const QPointF *points, int pointCount)
	Draws the first pointCount points in the buffer points. 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...
virtual void	drawRects (const QRectF *rects, int rectCount)
	Draws the first rectCount rectangles in the buffer rects. 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...

Protected Functions
	QPicturePaintEngine (QPaintEnginePrivate &dptr)
Protected Functions inherited from QPaintEngine
	QPaintEngine (QPaintEnginePrivate &data, PaintEngineFeatures devcaps=0)

Private Functions
void	writeCmdLength (int pos, const QRectF &r, bool corr)

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 }
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 66 of file qpaintengine_pic_p.h.

Constructors and Destructors

QPicturePaintEngine() [1/2]

QPicturePaintEngine::QPicturePaintEngine

(

)

Definition at line 74 of file qpaintengine_pic.cpp.

Referenced by type().

    : QPaintEngine(*(new QPicturePaintEnginePrivate), AllFeatures)
{
    Q_D(QPicturePaintEngine);
    d->pt = 0;
}

~QPicturePaintEngine()

QPicturePaintEngine::~QPicturePaintEngine

(

)

Definition at line 88 of file qpaintengine_pic.cpp.

{
}

QPicturePaintEngine() [2/2]

QPicturePaintEngine::QPicturePaintEngine ( QPaintEnginePrivate &  dptr )

protected

Definition at line 81 of file qpaintengine_pic.cpp.

    : QPaintEngine(dptr, AllFeatures)
{
    Q_D(QPicturePaintEngine);
    d->pt = 0;
}

Functions

begin()

bool QPicturePaintEngine::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()

Implements QPaintEngine.

Definition at line 92 of file qpaintengine_pic.cpp.

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << "QPicturePaintEngine::begin()";
#endif
    Q_ASSERT(pd);
    QPicture *pic = static_cast<QPicture *>(pd);

    d->pdev = pd;
    d->pic_d = pic->d_func();
    Q_ASSERT(d->pic_d);

    d->s.setDevice(&d->pic_d->pictb);
    d->s.setVersion(d->pic_d->formatMajor);

    d->pic_d->pictb.open(QIODevice::WriteOnly | QIODevice::Truncate);
    d->s.writeRawData(qt_mfhdr_tag, 4);
    d->s << (quint16) 0 << (quint16) d->pic_d->formatMajor << (quint16) d->pic_d->formatMinor;
    d->s << (quint8) QPicturePrivate::PdcBegin << (quint8) sizeof(qint32);
    d->pic_d->brect = QRect();
    if (d->pic_d->formatMajor >= 4) {
        QRect r = pic->boundingRect();
        d->s << (qint32) r.left() << (qint32) r.top() << (qint32) r.width()
             << (qint32) r.height();
    }
    d->pic_d->trecs = 0;
    d->s << (quint32)d->pic_d->trecs; // total number of records
    d->pic_d->formatOk = false;
    setActive(true);
    return true;
}

drawEllipse()

void QPicturePaintEngine::drawEllipse ( const QRectF &  rect )

virtual

Reimplement this function to draw the largest ellipse that can be contained within rectangle rect.

The default implementation calls drawPolygon().

Reimplemented from QPaintEngine.

Definition at line 376 of file qpaintengine_pic.cpp.

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> drawEllipse():" << rect;
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcDrawEllipse);
    d->s << rect;
    writeCmdLength(pos, rect, true);
}

drawImage()

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

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 461 of file qpaintengine_pic.cpp.

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> drawImage():" << r << sr;
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcDrawImage);
    if (d->pic_d->in_memory_only) {
        int index = d->pic_d->image_list.size();
        d->pic_d->image_list.append(image);
        d->s << r << index << sr << (quint32) flags;
    } else {
        d->s << r << image << sr << (quint32) flags;
    }
    writeCmdLength(pos, r, false);
}

drawPath()

void QPicturePaintEngine::drawPath ( const QPainterPath &  path )

virtual

The default implementation ignores the path and does nothing.

Reimplemented from QPaintEngine.

Definition at line 388 of file qpaintengine_pic.cpp.

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> drawPath():" << path.boundingRect();
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcDrawPath);
    d->s << path;
    writeCmdLength(pos, path.boundingRect(), true);
}

drawPixmap()

void QPicturePaintEngine::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.

Implements QPaintEngine.

Definition at line 424 of file qpaintengine_pic.cpp.

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> drawPixmap():" << r;
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcDrawPixmap);

    if (d->pic_d->in_memory_only) {
        int index = d->pic_d->pixmap_list.size();
        d->pic_d->pixmap_list.append(pm);
        d->s << r << index << sr;
    } else {
        d->s << r << pm << sr;
    }
    writeCmdLength(pos, r, false);
}

drawPolygon()

void QPicturePaintEngine::drawPolygon ( const QPointF *  points, int  pointCount, PolygonDrawMode  mode  )

virtual

Reimplement this virtual function to draw the polygon defined by the pointCount first points in points, using mode mode.

Note

At least one of the drawPolygon() functions must be reimplemented.

Reimplemented from QPaintEngine.

Definition at line 400 of file qpaintengine_pic.cpp.

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> drawPolygon(): size=" << numPoints;
#endif
    int pos;

    QPolygonF polygon;
    for (int i=0; i<numPoints; ++i)
        polygon << points[i];

    if (mode == PolylineMode) {
        SERIALIZE_CMD(QPicturePrivate::PdcDrawPolyline);
        d->s << polygon;
    } else {
        SERIALIZE_CMD(QPicturePrivate::PdcDrawPolygon);
        d->s << polygon;
        d->s << (qint8)(mode == OddEvenMode ? 0 : 1);
    }

    writeCmdLength(pos, polygon.boundingRect(), true);
}

drawTextItem()

void QPicturePaintEngine::drawTextItem ( const QPointF &  p, const QTextItem &  textItem  )

virtual

This function draws the text item textItem at position p.

The default implementation of this function converts the text to a QPainterPath and paints the resulting path.

Reimplemented from QPaintEngine.

Definition at line 480 of file qpaintengine_pic.cpp.

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> drawTextItem():" << p << ti.text();
#endif

    const QTextItemInt &si = static_cast<const QTextItemInt &>(ti);
    if (si.chars == 0)
        QPaintEngine::drawTextItem(p, ti); // Draw as path

    if (d->pic_d->formatMajor >= 9) {
        int pos;
        SERIALIZE_CMD(QPicturePrivate::PdcDrawTextItem);
        QFont fnt = ti.font();
        fnt.setUnderline(false);
        fnt.setStrikeOut(false);
        fnt.setOverline(false);

        qreal justificationWidth = 0;
        if (si.justified)
            justificationWidth = si.width.toReal();

        d->s << p << ti.text() << fnt << ti.renderFlags() << double(fnt.d->dpi)/qt_defaultDpi() << justificationWidth;
        writeCmdLength(pos, /*brect=*/QRectF(), /*corr=*/false);
    } else if (d->pic_d->formatMajor >= 8) {
        // old old (buggy) format
        int pos;
        SERIALIZE_CMD(QPicturePrivate::PdcDrawTextItem);
        d->s << QPointF(p.x(), p.y() - ti.ascent()) << ti.text() << ti.font() << ti.renderFlags();
        writeCmdLength(pos, /*brect=*/QRectF(), /*corr=*/false);
    } else {
        // old (buggy) format
        int pos;
        SERIALIZE_CMD(QPicturePrivate::PdcDrawText2);
        d->s << p << ti.text();
        writeCmdLength(pos, QRectF(p, QSizeF(1,1)), true);
    }
}

drawTiledPixmap()

void QPicturePaintEngine::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 QPaintEngine.

Definition at line 443 of file qpaintengine_pic.cpp.

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> drawTiledPixmap():" << r << s;
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcDrawTiledPixmap);
    if (d->pic_d->in_memory_only) {
        int index = d->pic_d->pixmap_list.size();
        d->pic_d->pixmap_list.append(pixmap);
        d->s << r << index << s;
    } else {
        d->s << r << pixmap << s;
    }
    writeCmdLength(pos, r, false);
}

end()

bool QPicturePaintEngine::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()

Implements QPaintEngine.

Definition at line 125 of file qpaintengine_pic.cpp.

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << "QPicturePaintEngine::end()";
#endif
    d->pic_d->trecs++;
    d->s << (quint8) QPicturePrivate::PdcEnd << (quint8) 0;
    int cs_start = sizeof(quint32);                // pos of checksum word
    int data_start = cs_start + sizeof(quint16);
    int brect_start = data_start + 2*sizeof(qint16) + 2*sizeof(quint8);
    int pos = d->pic_d->pictb.pos();
    d->pic_d->pictb.seek(brect_start);
    if (d->pic_d->formatMajor >= 4) { // bounding rectangle
        QRect r = static_cast<QPicture *>(d->pdev)->boundingRect();
        d->s << (qint32) r.left() << (qint32) r.top() << (qint32) r.width()
             << (qint32) r.height();
    }
    d->s << (quint32) d->pic_d->trecs;                        // write number of records
    d->pic_d->pictb.seek(cs_start);
    QByteArray buf = d->pic_d->pictb.buffer();
    quint16 cs = (quint16) qChecksum(buf.constData() + data_start, pos - data_start);
    d->s << cs;                                // write checksum
    d->pic_d->pictb.close();
    setActive(false);
    return true;
}

type()

Type QPicturePaintEngine::type ( ) const

inlinevirtual

Reimplement this function to return the paint engine Type.

Implements QPaintEngine.

Definition at line 107 of file qpaintengine_pic_p.h.

{ return Picture; }

updateBackground()

void QPicturePaintEngine::updateBackground	(	Qt::BGMode	bgmode,
		const QBrush &	bgBrush
	)

Definition at line 257 of file qpaintengine_pic.cpp.

Referenced by updateState().

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> updateBackground(): mode:" << bgMode << "style:" << bgBrush.style();
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcSetBkColor);
    d->s << bgBrush.color();
    writeCmdLength(pos, QRect(), false);

    SERIALIZE_CMD(QPicturePrivate::PdcSetBkMode);
    d->s << (qint8) bgMode;
    writeCmdLength(pos, QRectF(), false);
}

updateBrush()

void QPicturePaintEngine::updateBrush

(

const QBrush &

brush

)

Definition at line 214 of file qpaintengine_pic.cpp.

Referenced by updateState().

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> updateBrush(): style:" << brush.style();
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcSetBrush);
    if (d->pic_d->in_memory_only) {
        int index = d->pic_d->brush_list.size();
        d->pic_d->brush_list.append(brush);
        d->s << index;
    } else {
        d->s << brush;
    }
    writeCmdLength(pos, QRect(), false);
}

updateBrushOrigin()

void QPicturePaintEngine::updateBrushOrigin

(

const QPointF &

origin

)

Definition at line 232 of file qpaintengine_pic.cpp.

Referenced by updateState().

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> updateBrushOrigin(): " << p;
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcSetBrushOrigin);
    d->s << p;
    writeCmdLength(pos, QRect(), false);
}

updateClipEnabled()

void QPicturePaintEngine::updateClipEnabled

(

bool

enabled

)

Definition at line 190 of file qpaintengine_pic.cpp.

Referenced by updateState().

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> updateClipEnabled():" << enabled;
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcSetClipEnabled);
    d->s << enabled;
    writeCmdLength(pos, QRectF(), false);
}

updateClipPath()

void QPicturePaintEngine::updateClipPath	(	const QPainterPath &	path,
		Qt::ClipOperation	op
	)

Definition at line 298 of file qpaintengine_pic.cpp.

Referenced by updateState().

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> updateClipPath(): op:" << op
             << "bounding rect:" << path.boundingRect();
#endif
    int pos;

    SERIALIZE_CMD(QPicturePrivate::PdcSetClipPath);
    d->s << path << qint8(op);
    writeCmdLength(pos, QRectF(), false);
}

updateClipRegion()

void QPicturePaintEngine::updateClipRegion	(	const QRegion &	region,
		Qt::ClipOperation	op
	)

Definition at line 285 of file qpaintengine_pic.cpp.

Referenced by updateState().

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> updateClipRegion(): op:" << op
             << "bounding rect:" << region.boundingRect();
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcSetClipRegion);
    d->s << region << qint8(op);
    writeCmdLength(pos, QRectF(), false);
}

updateCompositionMode()

void QPicturePaintEngine::updateCompositionMode

(

QPainter::CompositionMode

cmode

)

Definition at line 178 of file qpaintengine_pic.cpp.

Referenced by updateState().

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> updateCompositionMode():" << cmode;
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcSetCompositionMode);
    d->s << (qint32)cmode;
    writeCmdLength(pos, QRectF(), false);
}

updateFont()

void QPicturePaintEngine::updateFont

(

const QFont &

font

)

Definition at line 244 of file qpaintengine_pic.cpp.

Referenced by updateState().

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> updateFont(): pt sz:" << font.pointSize();
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcSetFont);
    QFont fnt = font;
    d->s << fnt;
    writeCmdLength(pos, QRectF(), false);
}

updateMatrix()

void QPicturePaintEngine::updateMatrix

(

const QTransform &

matrix

)

Definition at line 273 of file qpaintengine_pic.cpp.

Referenced by updateState().

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> updateMatrix():" << matrix;
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcSetWMatrix);
    d->s << matrix << (qint8) false;
    writeCmdLength(pos, QRectF(), false);
}

updateOpacity()

void QPicturePaintEngine::updateOpacity

(

qreal

opacity

)

Definition at line 202 of file qpaintengine_pic.cpp.

Referenced by updateState().

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> updateOpacity():" << opacity;
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcSetOpacity);
    d->s << double(opacity);
    writeCmdLength(pos, QRectF(), false);
}

updatePen()

void QPicturePaintEngine::updatePen

(

const QPen &

pen

)

Definition at line 159 of file qpaintengine_pic.cpp.

Referenced by updateState().

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> updatePen(): width:" << pen.width() << "style:"
             << pen.style() << "color:" << pen.color();
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcSetPen);
    if (d->pic_d->in_memory_only) {
        int index = d->pic_d->pen_list.size();
        d->pic_d->pen_list.append(pen);
        d->s << index;
    } else {
        d->s << pen;
    }
    writeCmdLength(pos, QRect(), false);
}

updateRenderHints()

void QPicturePaintEngine::updateRenderHints

(

QPainter::RenderHints

hints

)

Definition at line 312 of file qpaintengine_pic.cpp.

Referenced by updateState().

{
    Q_D(QPicturePaintEngine);
#ifdef QT_PICTURE_DEBUG
    qDebug() << " -> updateRenderHints(): " << hints;
#endif
    int pos;
    SERIALIZE_CMD(QPicturePrivate::PdcSetRenderHint);
    d->s << (quint32) hints;
    writeCmdLength(pos, QRect(), false);
}

updateState()

void QPicturePaintEngine::updateState ( const QPaintEngineState &  state )

virtual

Reimplement this function to update the state of a paint engine.

When implemented, this function is responsible for checking the paint engine's current state and update the properties that are changed. Use the QPaintEngineState::state() function to find out which properties that must be updated, then use the corresponding GetFunction{get function} to retrieve the current values for the given properties.

See also

QPaintEngineState

Implements QPaintEngine.

Definition at line 520 of file qpaintengine_pic.cpp.

{
    QPaintEngine::DirtyFlags flags = state.state();
    if (flags & DirtyPen) updatePen(state.pen());
    if (flags & DirtyBrush) updateBrush(state.brush());
    if (flags & DirtyBrushOrigin) updateBrushOrigin(state.brushOrigin());
    if (flags & DirtyFont) updateFont(state.font());
    if (flags & DirtyBackground) updateBackground(state.backgroundMode(), state.backgroundBrush());
    if (flags & DirtyTransform) updateMatrix(state.transform());
    if (flags & DirtyClipEnabled) updateClipEnabled(state.isClipEnabled());
    if (flags & DirtyClipRegion) updateClipRegion(state.clipRegion(), state.clipOperation());
    if (flags & DirtyClipPath) updateClipPath(state.clipPath(), state.clipOperation());
    if (flags & DirtyHints) updateRenderHints(state.renderHints());
    if (flags & DirtyCompositionMode) updateCompositionMode(state.compositionMode());
    if (flags & DirtyOpacity) updateOpacity(state.opacity());
}

writeCmdLength()

void QPicturePaintEngine::writeCmdLength ( int  pos, const QRectF &  r, bool  corr  )

private

Definition at line 324 of file qpaintengine_pic.cpp.

Referenced by drawEllipse(), drawImage(), drawPath(), drawPixmap(), drawPolygon(), drawTextItem(), drawTiledPixmap(), type(), updateBackground(), updateBrush(), updateBrushOrigin(), updateClipEnabled(), updateClipPath(), updateClipRegion(), updateCompositionMode(), updateFont(), updateMatrix(), updateOpacity(), updatePen(), and updateRenderHints().

{
    Q_D(QPicturePaintEngine);
    int newpos = d->pic_d->pictb.pos();            // new position
    int length = newpos - pos;
    QRectF br(r);

    if (length < 255) {                         // write 8-bit length
        d->pic_d->pictb.seek(pos - 1);             // position to right index
        d->s << (quint8)length;
    } else {                                    // write 32-bit length
        d->s << (quint32)0;                    // extend the buffer
        d->pic_d->pictb.seek(pos - 1);             // position to right index
        d->s << (quint8)255;                   // indicate 32-bit length
        char *p = d->pic_d->pictb.buffer().data();
        memmove(p+pos+4, p+pos, length);        // make room for 4 byte
        d->s << (quint32)length;
        newpos += 4;
    }
    d->pic_d->pictb.seek(newpos);                  // set to new position

    if (br.width() > 0.0 || br.height() > 0.0) {
        if (corr) {                             // widen bounding rect
            int w2 = painter()->pen().width() / 2;
            br.setCoords(br.left() - w2, br.top() - w2,
                         br.right() + w2, br.bottom() + w2);
        }
        br = painter()->transform().mapRect(br);
        if (painter()->hasClipping()) {
            QRect cr = painter()->clipRegion().boundingRect();
            br &= cr;
        }

        if (br.width() > 0.0 || br.height() > 0.0) {
            int minx = qFloor(br.left());
            int miny = qFloor(br.top());
            int maxx = qCeil(br.right());
            int maxy = qCeil(br.bottom());

            if (d->pic_d->brect.width() > 0 || d->pic_d->brect.height() > 0) {
                minx = qMin(minx, d->pic_d->brect.left());
                miny = qMin(miny, d->pic_d->brect.top());
                maxx = qMax(maxx, d->pic_d->brect.x() + d->pic_d->brect.width());
                maxy = qMax(maxy, d->pic_d->brect.y() + d->pic_d->brect.height());
                d->pic_d->brect = QRect(minx, miny, maxx - minx, maxy - miny);
            } else {
                d->pic_d->brect = QRect(minx, miny, maxx - minx, maxy - miny);
            }
        }
    }
}

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

• /src/gui/image/qpaintengine_pic_p.h
• /src/gui/image/qpaintengine_pic.cpp