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Internal/Contributor docs for the Qt SDK. <b>Note:</b> These are NOT official API docs; those are found <a href='https://doc.qt.io/'>here</a>.
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Public Member Functions | Protected Member Functions | List of all members
QPicturePaintEngine Class Reference

#include <qpaintengine_pic_p.h>

+ Inheritance diagram for QPicturePaintEngine:
+ Collaboration diagram for QPicturePaintEngine:

Public Member Functions

 QPicturePaintEngine ()
 
 ~QPicturePaintEngine ()
 
bool begin (QPaintDevice *pdev) override
 Reimplement this function to initialise your paint engine when painting is to start on the paint device pdev.
 
bool end () override
 Reimplement this function to finish painting on the current paint device.
 
void updateState (const QPaintEngineState &state) override
 Reimplement this function to update the state of a paint engine.
 
void updatePen (const QPen &pen)
 
void updateBrush (const QBrush &brush)
 
void updateBrushOrigin (const QPointF &origin)
 
void updateFont (const QFont &font)
 
void updateBackground (Qt::BGMode bgmode, const QBrush &bgBrush)
 
void updateMatrix (const QTransform &matrix)
 
void updateClipRegion (const QRegion &region, Qt::ClipOperation op)
 
void updateClipPath (const QPainterPath &path, Qt::ClipOperation op)
 
void updateRenderHints (QPainter::RenderHints hints)
 
void updateCompositionMode (QPainter::CompositionMode cmode)
 
void updateClipEnabled (bool enabled)
 
void updateOpacity (qreal opacity)
 
void drawEllipse (const QRectF &rect) override
 Reimplement this function to draw the largest ellipse that can be contained within rectangle rect.
 
void drawPath (const QPainterPath &path) override
 The default implementation ignores the path and does nothing.
 
void drawPolygon (const QPointF *points, int numPoints, PolygonDrawMode mode) override
 Reimplement this virtual function to draw the polygon defined by the pointCount first points in points, using mode mode.
 
void drawPixmap (const QRectF &r, const QPixmap &pm, const QRectF &sr) override
 Reimplement this function to draw the part of the pm specified by the sr rectangle in the given r.
 
void drawTiledPixmap (const QRectF &r, const QPixmap &pixmap, const QPointF &s) override
 Reimplement this function to draw the pixmap in the given rect, starting at the given p.
 
void drawImage (const QRectF &r, const QImage &image, const QRectF &sr, Qt::ImageConversionFlags flags=Qt::AutoColor) override
 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.
 
void drawTextItem (const QPointF &p, const QTextItem &ti) override
 This function draws the text item textItem at position p.
 
Type type () const override
 Reimplement this function to return the paint engine \l{Type}.
 
virtual 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.
 
virtual void drawPolygon (const QPoint *points, int pointCount, PolygonDrawMode mode)
 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Reimplement this virtual function to draw the polygon defined by the pointCount first points in points, using mode mode.
 
- Public Member Functions inherited from QPaintEngine
 QPaintEngine (PaintEngineFeatures features=PaintEngineFeatures())
 Creates a paint engine with the featureset specified by caps.
 
virtual ~QPaintEngine ()
 Destroys the paint engine.
 
bool isActive () const
 Returns true if the paint engine is actively drawing; otherwise returns false.
 
void setActive (bool newState)
 Sets the active state of the paint engine to state.
 
virtual void drawRects (const QRect *rects, int rectCount)
 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.The default implementation converts the first rectCount rectangles in the buffer rects to a QRectF and calls the floating point version of this function.
 
virtual void drawRects (const QRectF *rects, int rectCount)
 Draws the first rectCount rectangles in the buffer rects.
 
virtual void drawLines (const QLine *lines, int lineCount)
 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.The default implementation converts the first lineCount lines in lines to a QLineF and calls the floating point version of this function.
 
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.
 
virtual void drawEllipse (const QRect &r)
 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.The default implementation of this function calls the floating point version of this function.
 
virtual void drawPoints (const QPointF *points, int pointCount)
 Draws the first pointCount points in the buffer points.
 
virtual void drawPoints (const QPoint *points, int pointCount)
 Draws the first pointCount points in the buffer points.
 
void setPaintDevice (QPaintDevice *device)
 
QPaintDevice * paintDevice () const
 Returns the device that this engine is painting on, if painting is active; otherwise returns \nullptr.
 
void setSystemClip (const QRegion &baseClip)
 
QRegion systemClip () const
 
void setSystemRect (const QRect &rect)
 
QRect systemRect () const
 
virtual QPoint coordinateOffset () const
 
void fix_neg_rect (int *x, int *y, int *w, int *h)
 
bool testDirty (DirtyFlags df)
 
void setDirty (DirtyFlags df)
 
void clearDirty (DirtyFlags df)
 
bool hasFeature (PaintEngineFeatures feature) const
 Returns true if the paint engine supports the specified feature; otherwise returns false.
 
QPainter * painter () const
 Returns the paint engine's painter.
 
void syncState ()
 
bool isExtended () const
 
virtual QPixmap createPixmap (QSize size)
 
virtual QPixmap createPixmapFromImage (QImage image, Qt::ImageConversionFlags flags=Qt::AutoColor)
 

Protected Member Functions

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

Additional Inherited Members

- Public Types inherited from QPaintEngine
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  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
}
 \value DirtyPen The pen is dirty and needs to be updated. More...
 
enum  PolygonDrawMode { OddEvenMode , WindingMode , ConvexMode , PolylineMode }
 \value OddEvenMode The polygon should be drawn using OddEven fill rule. More...
 
enum  Type {
  X11 , Windows , QuickDraw , CoreGraphics ,
  MacPrinter , QWindowSystem , OpenGL , Picture ,
  SVG , Raster , Direct3D , Pdf ,
  OpenVG , OpenGL2 , PaintBuffer , Blitter ,
  Direct2D , User = 50 , MaxUser = 100
}
 \value X11 \value Windows \value MacPrinter \value CoreGraphics \macos's Quartz2D (CoreGraphics) \value QuickDraw \macos's QuickDraw \value QWindowSystem Qt for Embedded Linux \value OpenGL \value Picture QPicture format \value SVG Scalable Vector Graphics XML format \value Raster \value Direct3D Windows only, Direct3D based engine \value Pdf Portable Document Format \value OpenVG \value User First user type ID \value MaxUser Last user type ID \value OpenGL2 \value PaintBuffer \value Blitter \value Direct2D Windows only, Direct2D based engine More...
 
- Protected Attributes inherited from QPaintEngine
QPaintEngineState * state
 
PaintEngineFeatures gccaps
 
uint active: 1
 
uint selfDestruct: 1
 
uint extended: 1
 
QScopedPointer< QPaintEnginePrivate > d_ptr
 

Detailed Description

Definition at line 28 of file qpaintengine_pic_p.h.

Constructor & Destructor Documentation

◆ QPicturePaintEngine() [1/2]

QPicturePaintEngine::QPicturePaintEngine ( )

Definition at line 36 of file qpaintengine_pic.cpp.

References d.

◆ ~QPicturePaintEngine()

QPicturePaintEngine::~QPicturePaintEngine ( )

Definition at line 50 of file qpaintengine_pic.cpp.

◆ QPicturePaintEngine() [2/2]

QPicturePaintEngine::QPicturePaintEngine ( QPaintEnginePrivate & dptr)
protected

Definition at line 43 of file qpaintengine_pic.cpp.

References d.

Member Function Documentation

◆ begin()

bool QPicturePaintEngine::begin ( QPaintDevice * pdev)
overridevirtual

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 54 of file qpaintengine_pic.cpp.

References d, QRect::left(), QPicturePrivate::PdcBegin, Q_ASSERT, qDebug, qt_mfhdr_tag, QPaintEngine::setActive(), QIODeviceBase::Truncate, and QIODeviceBase::WriteOnly.

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◆ drawEllipse()

void QPicturePaintEngine::drawEllipse ( const QRectF & rect)
overridevirtual

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 338 of file qpaintengine_pic.cpp.

References d, QPicturePrivate::PdcDrawEllipse, pos, qDebug, rect, and SERIALIZE_CMD.

◆ drawImage()

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

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 424 of file qpaintengine_pic.cpp.

References d, QPicturePrivate::PdcDrawImage, pos, qDebug, and SERIALIZE_CMD.

◆ drawPath()

void QPicturePaintEngine::drawPath ( const QPainterPath & path)
overridevirtual

The default implementation ignores the path and does nothing.

Reimplemented from QPaintEngine.

Definition at line 350 of file qpaintengine_pic.cpp.

References d, QPicturePrivate::PdcDrawPath, pos, qDebug, and SERIALIZE_CMD.

◆ drawPixmap()

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

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

Implements QPaintEngine.

Definition at line 387 of file qpaintengine_pic.cpp.

References d, QPicturePrivate::PdcDrawPixmap, pos, qDebug, and SERIALIZE_CMD.

◆ drawPolygon() [1/3]

void QPaintEngine::drawPolygon ( const QPoint * points,
int pointCount,
PolygonDrawMode mode )
virtual

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.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 137 of file qpaintengine.cpp.

◆ drawPolygon() [2/3]

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

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 362 of file qpaintengine_pic.cpp.

References d, i, QPaintEngine::OddEvenMode, QPicturePrivate::PdcDrawPolygon, QPicturePrivate::PdcDrawPolyline, QPaintEngine::PolylineMode, pos, qDebug, qint8, and SERIALIZE_CMD.

◆ drawPolygon() [3/3]

void QPaintEngine::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 136 of file qpaintengine.cpp.

◆ drawTextItem()

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

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 443 of file qpaintengine_pic.cpp.

References QTextItemInt::chars, d, QFontPrivate::dpi, QPaintEngine::drawTextItem(), QTextItemInt::justified, QPicturePrivate::PdcDrawText2, QPicturePrivate::PdcDrawTextItem, pos, qDebug, qt_defaultDpi(), SERIALIZE_CMD, QFont::setOverline(), QFont::setStrikeOut(), QFont::setUnderline(), QFixed::toReal(), and QTextItemInt::width.

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◆ drawTiledPixmap()

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

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 406 of file qpaintengine_pic.cpp.

References d, QPicturePrivate::PdcDrawTiledPixmap, pixmap, pos, qDebug, and SERIALIZE_CMD.

◆ end()

bool QPicturePaintEngine::end ( )
overridevirtual

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 87 of file qpaintengine_pic.cpp.

References boundingRect(), d, QPicturePrivate::PdcEnd, pos, qChecksum(), qDebug, and QPaintEngine::setActive().

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◆ type()

Type QPicturePaintEngine::type ( ) const
inlineoverridevirtual

Reimplement this function to return the paint engine \l{Type}.

Implements QPaintEngine.

Definition at line 64 of file qpaintengine_pic_p.h.

References QPaintEngine::Picture.

◆ updateBackground()

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

Definition at line 219 of file qpaintengine_pic.cpp.

References QBrush::color(), d, QPicturePrivate::PdcSetBkColor, QPicturePrivate::PdcSetBkMode, pos, qDebug, qint8, SERIALIZE_CMD, and QBrush::style().

Referenced by updateState().

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◆ updateBrush()

void QPicturePaintEngine::updateBrush ( const QBrush & brush)

Definition at line 176 of file qpaintengine_pic.cpp.

References d, QPicturePrivate::PdcSetBrush, pos, qDebug, and SERIALIZE_CMD.

Referenced by updateState().

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◆ updateBrushOrigin()

void QPicturePaintEngine::updateBrushOrigin ( const QPointF & origin)

Definition at line 194 of file qpaintengine_pic.cpp.

References d, QPicturePrivate::PdcSetBrushOrigin, pos, qDebug, and SERIALIZE_CMD.

Referenced by updateState().

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◆ updateClipEnabled()

void QPicturePaintEngine::updateClipEnabled ( bool enabled)

Definition at line 152 of file qpaintengine_pic.cpp.

References d, enabled, QPicturePrivate::PdcSetClipEnabled, pos, qDebug, and SERIALIZE_CMD.

Referenced by updateState().

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◆ updateClipPath()

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

Definition at line 260 of file qpaintengine_pic.cpp.

References d, QPicturePrivate::PdcSetClipPath, pos, qDebug, qint8, and SERIALIZE_CMD.

Referenced by updateState().

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◆ updateClipRegion()

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

Definition at line 247 of file qpaintengine_pic.cpp.

References QRegion::boundingRect(), d, QPicturePrivate::PdcSetClipRegion, pos, qDebug, qint8, and SERIALIZE_CMD.

Referenced by updateState().

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◆ updateCompositionMode()

void QPicturePaintEngine::updateCompositionMode ( QPainter::CompositionMode cmode)

Definition at line 140 of file qpaintengine_pic.cpp.

References d, QPicturePrivate::PdcSetCompositionMode, pos, qDebug, and SERIALIZE_CMD.

Referenced by updateState().

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◆ updateFont()

void QPicturePaintEngine::updateFont ( const QFont & font)

Definition at line 206 of file qpaintengine_pic.cpp.

References d, font, QPicturePrivate::PdcSetFont, QFont::pointSize(), pos, qDebug, and SERIALIZE_CMD.

Referenced by updateState().

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◆ updateMatrix()

void QPicturePaintEngine::updateMatrix ( const QTransform & matrix)

Definition at line 235 of file qpaintengine_pic.cpp.

References d, QPicturePrivate::PdcSetWMatrix, pos, qDebug, qint8, and SERIALIZE_CMD.

Referenced by updateState().

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◆ updateOpacity()

void QPicturePaintEngine::updateOpacity ( qreal opacity)

Definition at line 164 of file qpaintengine_pic.cpp.

References d, QPicturePrivate::PdcSetOpacity, pos, qDebug, and SERIALIZE_CMD.

Referenced by updateState().

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◆ updatePen()

void QPicturePaintEngine::updatePen ( const QPen & pen)

Definition at line 121 of file qpaintengine_pic.cpp.

References QPen::color(), d, QPicturePrivate::PdcSetPen, pos, qDebug, SERIALIZE_CMD, QPen::style(), and QPen::width().

Referenced by updateState().

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◆ updateRenderHints()

void QPicturePaintEngine::updateRenderHints ( QPainter::RenderHints hints)

Definition at line 274 of file qpaintengine_pic.cpp.

References d, QPicturePrivate::PdcSetRenderHint, pos, qDebug, and SERIALIZE_CMD.

Referenced by updateState().

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◆ updateState()

void QPicturePaintEngine::updateState ( const QPaintEngineState & state)
overridevirtual

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 \l {GetFunction}{get function} to retrieve the current values for the given properties.

See also
QPaintEngineState

Implements QPaintEngine.

Definition at line 483 of file qpaintengine_pic.cpp.

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

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