QVGPaintEngine Class Reference

#include <qpaintengine_vg_p.h>

Inheritance diagram for QVGPaintEngine:

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	beginNativePainting ()
void	brushChanged ()
void	brushOriginChanged ()
void	clip (const QVectorPath &path, Qt::ClipOperation op)
void	clip (const QRect &rect, Qt::ClipOperation op)
void	clip (const QRegion &region, Qt::ClipOperation op)
void	clip (const QPainterPath &path, Qt::ClipOperation op)
void	clipEnabledChanged ()
void	compositionModeChanged ()
QPainterState *	createState (QPainterState *orig) const
void	draw (const QVectorPath &path)
bool	drawCachedGlyphs (int numGlyphs, const glyph_t *glyphs, const QFont &font, QFontEngine *fontEngine, const QPointF &p, const QFixedPoint *positions)
void	drawEllipse (const QRectF &r)
	Reimplement this function to draw the largest ellipse that can be contained within rectangle rect. More...
void	drawEllipse (const QRect &r)
	The default implementation of this function calls the floating point version of this function. More...
void	drawImage (const QRectF &r, const QImage &pm, 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	drawImage (const QPointF &pos, const QImage &image)
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...
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	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	drawPixmap (const QPointF &pos, const QPixmap &pm)
void	drawPixmapFragments (const QPainter::PixmapFragment *drawingData, int dataCount, const QPixmap &pixmap, QFlags< QPainter::PixmapFragmentHint > hints)
void	drawPoints (const QPointF *points, int pointCount)
	Draws the first pointCount points in the buffer points. More...
void	drawPoints (const QPoint *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	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...
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	drawRects (const QRectF *rects, int rectCount)
	Draws the first rectCount rectangles in the buffer rects. More...
void	drawRoundedRect (const QRectF &rect, qreal xrad, qreal yrad, Qt::SizeMode mode)
void	drawStaticTextItem (QStaticTextItem *staticTextItem)
void	drawTextItem (const QPointF &p, const QTextItem &textItem)
	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...
void	endNativePainting ()
void	fill (const QVectorPath &path, const QBrush &brush)
void	fillRect (const QRectF &rect, const QBrush &brush)
void	fillRect (const QRectF &rect, const QColor &color)
void	fillRegion (const QRegion &region, const QColor &color, const QSize &surfaceSize)
void	opacityChanged ()
void	penChanged ()
QPixmapFilter *	pixmapFilter (int type, const QPixmapFilter *prototype)
	QVGPaintEngine ()
void	renderHintsChanged ()
void	setState (QPainterState *s)
QVGPainterState *	state ()
const QVGPainterState *	state () const
void	stroke (const QVectorPath &path, const QPen &pen)
bool	supportsTransformations (qreal, const QTransform &) const
void	transformChanged ()
Type	type () const
	Reimplement this function to return the paint engine Type. More...
QVGPaintEnginePrivate *	vgPrivate ()
	~QVGPaintEngine ()
Public Functions inherited from QPaintEngineEx
virtual void	drawPixmapFragments (const QPainter::PixmapFragment *fragments, int fragmentCount, const QPixmap &pixmap, QPainter::PixmapFragmentHints hints)
virtual void	drawPixmapFragments (const QRectF *targetRects, const QRectF *sourceRects, int fragmentCount, const QPixmap &pixmap, QPainter::PixmapFragmentHints hints)
virtual uint	flags () const
	QPaintEngineEx ()
QPainterState *	state ()
const QPainterState *	state () const
virtual void	sync ()
virtual void	updateState (const QPaintEngineState &state)
	Reimplement this function to update the state of a paint engine. More...
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...
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
	QVGPaintEngine (QVGPaintEnginePrivate &data)
Protected Functions inherited from QPaintEngineEx
	QPaintEngineEx (QPaintEngineExPrivate &data)
Protected Functions inherited from QPaintEngine
	QPaintEngine (QPaintEnginePrivate &data, PaintEngineFeatures devcaps=0)

Private Functions
bool	canVgWritePixels (const QImage &image) const
bool	clearRect (const QRectF &rect, const QColor &color)
QRegion	defaultClipRegion ()
bool	isDefaultClipRect (const QRect &rect)
bool	isDefaultClipRegion (const QRegion &region)
void	restoreState (QPaintEngine::DirtyFlags dirty)
void	updateScissor ()

Additional Inherited Members
Public Types inherited from QPaintEngineEx
enum	Flags { DoNotEmulate = 0x01, IsEmulationEngine = 0x02 }
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 78 of file qpaintengine_vg_p.h.

Constructors and Destructors

QVGPaintEngine() [1/2]

QVGPaintEngine::QVGPaintEngine

(

)

Definition at line 1470 of file qpaintengine_vg.cpp.

    : QPaintEngineEx(*new QVGPaintEnginePrivate(this))
{
}

~QVGPaintEngine()

QVGPaintEngine::~QVGPaintEngine

(

)

Definition at line 1480 of file qpaintengine_vg.cpp.

{
}

QVGPaintEngine() [2/2]

QVGPaintEngine::QVGPaintEngine ( QVGPaintEnginePrivate &  data )

protected

Definition at line 1475 of file qpaintengine_vg.cpp.

    : QPaintEngineEx(data)
{
}

Functions

begin()

bool QVGPaintEngine::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 1539 of file qpaintengine_vg.cpp.

{
    Q_UNUSED(pdev);
    Q_D(QVGPaintEngine);

    // Initialize the VG painting objects if we haven't done it yet.
    if (!d->penPaint)
        d->initObjects();

    // The initial clip region is the entire device area.
    QVGPainterState *s = state();
    s->clipRegion = defaultClipRegion();

    // Initialize the VG state for this paint operation.
    restoreState(QPaintEngine::AllDirty);
    d->dirty = 0;
    d->rawVG = false;
    return true;
}

beginNativePainting()

void QVGPaintEngine::beginNativePainting ( )

virtual

Reimplemented from QPaintEngineEx.

Definition at line 3853 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);

    // About to enter raw VG mode: flush pending changes and make
    // sure that all matrices are set to the current transformation.
    QVGPainterState *s = this->state();
    d->ensurePen(s->pen);
    d->ensureBrush(s->brush);
    d->ensurePathTransform();
    d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, d->imageTransform);
#if !defined(QVG_NO_DRAW_GLYPHS)
    d->setTransform(VG_MATRIX_GLYPH_USER_TO_SURFACE, d->pathTransform);
#endif
    vgSeti(VG_SCISSORING, VG_FALSE);
    vgSeti(VG_MASKING, VG_FALSE);
    d->rawVG = true;
}

brushChanged()

void QVGPaintEngine::brushChanged ( )

virtual

Implements QPaintEngineEx.

Definition at line 2418 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);
    d->dirty |= QPaintEngine::DirtyBrush;

    d->hasExtendedRadialGradientPen = d->needsEmulation(state()->brush);
}

brushOriginChanged()

void QVGPaintEngine::brushOriginChanged ( )

virtual

Implements QPaintEngineEx.

Definition at line 2426 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);
    d->dirty |= QPaintEngine::DirtyBrushOrigin;
    d->brushOrigin = state()->brushOrigin;
    d->forcePenChange = true;
    d->forceBrushChange = true;
}

canVgWritePixels()

bool QVGPaintEngine::canVgWritePixels ( const QImage &  image ) const

private

Definition at line 3303 of file qpaintengine_vg.cpp.

Referenced by drawImage().

{
    Q_D(const QVGPaintEngine);

    // qt_vg_image_to_vg_format returns VG_sARGB_8888 as
    // fallback case if no matching VG format is found.
    // If given image format is not Format_ARGB32 and returned
    // format is VG_sARGB_8888, it means that no match was
    // found. In that case vgWritePixels cannot be used.
    // Also 1-bit formats cannot be used directly either.
    if ((image.format() != QImage::Format_ARGB32
           && qt_vg_image_to_vg_format(image.format()) == VG_sARGB_8888)
           || image.depth() == 1) {
        return false;
    }

    // vgWritePixels ignores masking, blending and xforms so we can only use it if
    // ALL of the following conditions are true:
    // - It is a simple translate, or a scale of -1 on the y-axis (inverted)
    // - The opacity is totally opaque
    // - The composition mode is "source" OR "source over" provided the image is opaque
    return ( d->imageTransform.type() <= QTransform::TxScale
            && d->imageTransform.m11() == 1.0 && qAbs(d->imageTransform.m22()) == 1.0)
            && d->opacity == 1.0f
            && (d->blendMode == VG_BLEND_SRC || (d->blendMode == VG_BLEND_SRC_OVER &&
                                                !image.hasAlphaChannel()));
}

clearRect()

bool QVGPaintEngine::clearRect ( const QRectF &  rect, const QColor &  color  )

private

Definition at line 2564 of file qpaintengine_vg.cpp.

Referenced by fillRect().

{
    Q_D(QVGPaintEngine);
    QVGPainterState *s = state();
    if (!s->clipEnabled || s->clipOperation == Qt::NoClip) {
        QRect r = d->transform.mapRect(rect).toRect();
        int height = paintDevice()->height();
        if (d->clearColor != color || d->clearOpacity != s->opacity) {
            VGfloat values[4];
            values[0] = color.redF();
            values[1] = color.greenF();
            values[2] = color.blueF();
            values[3] = color.alphaF() * s->opacity;
            vgSetfv(VG_CLEAR_COLOR, 4, values);
            d->clearColor = color;
            d->clearOpacity = s->opacity;
        }
        vgClear(r.x(), height - r.y() - r.height(),
                r.width(), r.height());
        return true;
    }
    return false;
}

clip() [1/4]

void QVGPaintEngine::clip ( const QVectorPath &  path, Qt::ClipOperation  op  )

virtual

Implements QPaintEngineEx.

Definition at line 1795 of file qpaintengine_vg.cpp.

Referenced by clip(), and clipTransformIsSimple().

{
    Q_D(QVGPaintEngine);

    d->dirty |= QPaintEngine::DirtyClipRegion;

    if (op == Qt::NoClip) {
        d->maskValid = false;
        d->maskIsSet = true;
        d->scissorMask = false;
        d->maskRect = QRect();
        vgSeti(VG_MASKING, VG_FALSE);
        return;
    }

    // We don't have vgRenderToMask(), so handle simple QRectF's only.
    if (path.shape() == QVectorPath::RectangleHint &&
            path.elementCount() == 4 && clipTransformIsSimple(d->transform)) {
        // Clipping region that resulted from QPainter::setClipRect(QRectF).
        // Convert it into a QRect and apply.
        const qreal *points = path.points();
        QRectF rect(points[0], points[1], points[2] - points[0],
                    points[5] - points[1]);
        clip(rect.toRect(), op);
        return;
    }

#if !defined(QVG_NO_RENDER_TO_MASK)
    QPaintDevice *pdev = paintDevice();
    int width = pdev->width();
    int height = pdev->height();

    if (op == Qt::ReplaceClip) {
        vgMask(VG_INVALID_HANDLE, VG_CLEAR_MASK, 0, 0, width, height);
        d->maskRect = QRect();
    } else if (!d->maskValid) {
        d->ensureMask(this, width, height);
    }

    d->ensurePathTransform();
    VGPath vgpath = d->vectorPathToVGPath(path);
    switch (op) {
        case Qt::ReplaceClip:
        case Qt::UniteClip:
            vgRenderToMask(vgpath, VG_FILL_PATH, VG_UNION_MASK);
            break;

        case Qt::IntersectClip:
            vgRenderToMask(vgpath, VG_FILL_PATH, VG_INTERSECT_MASK);
            break;

        default: break;
    }
    vgDestroyPath(vgpath);

    vgSeti(VG_MASKING, VG_TRUE);
    d->maskValid = true;
    d->maskIsSet = false;
    d->scissorMask = false;
#endif
}

clip() [2/4]

void QVGPaintEngine::clip ( const QRect &  rect, Qt::ClipOperation  op  )

virtual

Reimplemented from QPaintEngineEx.

Definition at line 1857 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);

    d->dirty |= QPaintEngine::DirtyClipRegion;

    // If we have a non-simple transform, then use path-based clipping.
    if (op != Qt::NoClip && !clipTransformIsSimple(d->transform)) {
        QPaintEngineEx::clip(rect, op);
        return;
    }

    switch (op) {
        case Qt::NoClip:
        {
            d->maskValid = false;
            d->maskIsSet = true;
            d->scissorMask = false;
            d->maskRect = QRect();
            vgSeti(VG_MASKING, VG_FALSE);
        }
        break;

        case Qt::ReplaceClip:
        {
            QRect r = d->transform.mapRect(rect);
            if (isDefaultClipRect(r)) {
                // Replacing the clip with a full-window region is the
                // same as turning off clipping.
                if (d->maskValid)
                    vgSeti(VG_MASKING, VG_FALSE);
                d->maskValid = false;
                d->maskIsSet = true;
                d->scissorMask = false;
                d->maskRect = QRect();
            } else {
                // Special case: if the intersection of the system
                // clip and "r" is a single rectangle, then use the
                // scissor for clipping.  We try to avoid allocating a
                // QRegion copy on the heap for the test if we can.
                QRegion clip = d->systemClip; // Reference-counted, no alloc.
                QRect clipRect;
                if (clip.rectCount() == 1) {
                    clipRect = clip.boundingRect().intersected(r);
                } else if (clip.isEmpty()) {
                    clipRect = r;
                } else {
                    clip = clip.intersect(r);
                    if (clip.rectCount() != 1) {
                        d->maskValid = false;
                        d->maskIsSet = false;
                        d->scissorMask = false;
                        d->maskRect = QRect();
                        d->modifyMask(this, VG_FILL_MASK, r);
                        break;
                    }
                    clipRect = clip.boundingRect();
                }
                d->maskValid = false;
                d->maskIsSet = false;
                d->scissorMask = true;
                d->maskRect = clipRect;
                vgSeti(VG_MASKING, VG_FALSE);
                updateScissor();
            }
        }
        break;

        case Qt::IntersectClip:
        {
            QRect r = d->transform.mapRect(rect);
            if (!d->maskValid) {
                // Mask has not been used yet, so intersect with
                // the previous scissor-based region in maskRect.
                if (d->scissorMask)
                    r = r.intersect(d->maskRect);
                if (isDefaultClipRect(r)) {
                    // The clip is the full window, so turn off clipping.
                    d->maskIsSet = true;
                    d->maskRect = QRect();
                } else {
                    // Activate the scissor on a smaller maskRect.
                    d->maskIsSet = false;
                    d->maskRect = r;
                }
                d->scissorMask = true;
                updateScissor();
            } else if (d->maskIsSet && isDefaultClipRect(r)) {
                // Intersecting a full-window clip with a full-window
                // region is the same as turning off clipping.
                if (d->maskValid)
                    vgSeti(VG_MASKING, VG_FALSE);
                d->maskValid = false;
                d->maskIsSet = true;
                d->scissorMask = false;
                d->maskRect = QRect();
            } else {
                d->modifyMask(this, VG_INTERSECT_MASK, r);
            }
        }
        break;

        case Qt::UniteClip:
        {
            // If we already have a full-window clip, then uniting a
            // region with it will do nothing.  Otherwise union.
            if (!(d->maskIsSet))
                d->modifyMask(this, VG_UNION_MASK, d->transform.mapRect(rect));
        }
        break;
    }
}

clip() [3/4]

void QVGPaintEngine::clip ( const QRegion &  region, Qt::ClipOperation  op  )

virtual

Reimplemented from QPaintEngineEx.

Definition at line 1970 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);

    // Use the QRect case if the region consists of a single rectangle.
    if (region.rectCount() == 1) {
        clip(region.boundingRect(), op);
        return;
    }

    d->dirty |= QPaintEngine::DirtyClipRegion;

    // If we have a non-simple transform, then use path-based clipping.
    if (op != Qt::NoClip && !clipTransformIsSimple(d->transform)) {
        QPaintEngineEx::clip(region, op);
        return;
    }

    switch (op) {
        case Qt::NoClip:
        {
            d->maskValid = false;
            d->maskIsSet = true;
            d->scissorMask = false;
            d->maskRect = QRect();
            vgSeti(VG_MASKING, VG_FALSE);
        }
        break;

        case Qt::ReplaceClip:
        {
            QRegion r = d->transform.map(region);
            if (isDefaultClipRegion(r)) {
                // Replacing the clip with a full-window region is the
                // same as turning off clipping.
                if (d->maskValid)
                    vgSeti(VG_MASKING, VG_FALSE);
                d->maskValid = false;
                d->maskIsSet = true;
                d->scissorMask = false;
                d->maskRect = QRect();
            } else {
                // Special case: if the intersection of the system
                // clip and the region is a single rectangle, then
                // use the scissor for clipping.
                QRegion clip = d->systemClip;
                if (clip.isEmpty())
                    clip = r;
                else
                    clip = clip.intersect(r);
                if (clip.rectCount() == 1) {
                    d->maskValid = false;
                    d->maskIsSet = false;
                    d->scissorMask = true;
                    d->maskRect = clip.boundingRect();
                    vgSeti(VG_MASKING, VG_FALSE);
                    updateScissor();
                } else {
                    d->maskValid = false;
                    d->maskIsSet = false;
                    d->scissorMask = false;
                    d->maskRect = QRect();
                    d->modifyMask(this, VG_FILL_MASK, r);
                }
            }
        }
        break;

        case Qt::IntersectClip:
        {
            if (region.rectCount() != 1) {
                // If there is more than one rectangle, then intersecting
                // the rectangles one by one in modifyMask() will not give
                // the desired result.  So fall back to path-based clipping.
                QPaintEngineEx::clip(region, op);
                return;
            }
            QRegion r = d->transform.map(region);
            if (d->maskIsSet && isDefaultClipRegion(r)) {
                // Intersecting a full-window clip with a full-window
                // region is the same as turning off clipping.
                if (d->maskValid)
                    vgSeti(VG_MASKING, VG_FALSE);
                d->maskValid = false;
                d->maskIsSet = true;
                d->scissorMask = false;
                d->maskRect = QRect();
            } else {
                d->modifyMask(this, VG_INTERSECT_MASK, r);
            }
        }
        break;

        case Qt::UniteClip:
        {
            // If we already have a full-window clip, then uniting a
            // region with it will do nothing.  Otherwise union.
            if (!(d->maskIsSet))
                d->modifyMask(this, VG_UNION_MASK, d->transform.map(region));
        }
        break;
    }
}

clip() [4/4]

void QVGPaintEngine::clip ( const QPainterPath &  path, Qt::ClipOperation  op  )

virtual

Reimplemented from QPaintEngineEx.

Definition at line 2117 of file qpaintengine_vg.cpp.

{
#if !defined(QVG_NO_RENDER_TO_MASK)
    Q_D(QVGPaintEngine);

    // If the path is a simple rectangle, then use clip(QRect) instead.
    QRectF simpleRect;
    if (qt_vg_pathToRect(path, &simpleRect)) {
        clip(simpleRect.toRect(), op);
        return;
    }

    d->dirty |= QPaintEngine::DirtyClipRegion;

    if (op == Qt::NoClip) {
        d->maskValid = false;
        d->maskIsSet = true;
        d->scissorMask = false;
        d->maskRect = QRect();
        vgSeti(VG_MASKING, VG_FALSE);
        return;
    }

    QPaintDevice *pdev = paintDevice();
    int width = pdev->width();
    int height = pdev->height();

    if (op == Qt::ReplaceClip) {
        vgMask(VG_INVALID_HANDLE, VG_CLEAR_MASK, 0, 0, width, height);
        d->maskRect = QRect();
    } else if (!d->maskValid) {
        d->ensureMask(this, width, height);
    }

    d->ensurePathTransform();
    VGPath vgpath = d->painterPathToVGPath(path);
    switch (op) {
        case Qt::ReplaceClip:
        case Qt::UniteClip:
            vgRenderToMask(vgpath, VG_FILL_PATH, VG_UNION_MASK);
            break;

        case Qt::IntersectClip:
            vgRenderToMask(vgpath, VG_FILL_PATH, VG_INTERSECT_MASK);
            break;

        default: break;
    }
    vgDestroyPath(vgpath);

    vgSeti(VG_MASKING, VG_TRUE);
    d->maskValid = true;
    d->maskIsSet = false;
    d->scissorMask = false;
#else
    QPaintEngineEx::clip(path, op);
#endif
}

clipEnabledChanged()

void QVGPaintEngine::clipEnabledChanged ( )

virtual

Implements QPaintEngineEx.

Definition at line 2380 of file qpaintengine_vg.cpp.

{
#if defined(QVG_SCISSOR_CLIP)
    vgSeti(VG_MASKING, VG_FALSE); // disable mask fallback
    updateScissor();
#else
    Q_D(QVGPaintEngine);
    QVGPainterState *s = state();
    d->dirty |= QPaintEngine::DirtyClipEnabled;
    if (s->clipEnabled && s->clipOperation != Qt::NoClip) {
        // Replay the entire clip stack to put the mask into the right state.
        d->maskValid = false;
        d->maskIsSet = true;
        d->scissorMask = false;
        d->maskRect = QRect();
        s->clipRegion = defaultClipRegion();
        d->replayClipOperations();
        d->transform = s->transform();
        d->updateTransform(paintDevice());
    } else {
        vgSeti(VG_MASKING, VG_FALSE);
        d->maskValid = false;
        d->maskIsSet = false;
        d->scissorMask = false;
        d->maskRect = QRect();
    }
#endif
}

compositionModeChanged()

void QVGPaintEngine::compositionModeChanged ( )

virtual

Implements QPaintEngineEx.

Definition at line 2444 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);
    d->dirty |= QPaintEngine::DirtyCompositionMode;

    VGint vgMode = VG_BLEND_SRC_OVER;

    switch (state()->composition_mode) {
    case QPainter::CompositionMode_SourceOver:
        vgMode = VG_BLEND_SRC_OVER;
        break;
    case QPainter::CompositionMode_DestinationOver:
        vgMode = VG_BLEND_DST_OVER;
        break;
    case QPainter::CompositionMode_Source:
        vgMode = VG_BLEND_SRC;
        break;
    case QPainter::CompositionMode_SourceIn:
        vgMode = VG_BLEND_SRC_IN;
        break;
    case QPainter::CompositionMode_DestinationIn:
        vgMode = VG_BLEND_DST_IN;
        break;
    case QPainter::CompositionMode_Plus:
        vgMode = VG_BLEND_ADDITIVE;
        break;
    case QPainter::CompositionMode_Multiply:
        vgMode = VG_BLEND_MULTIPLY;
        break;
    case QPainter::CompositionMode_Screen:
        vgMode = VG_BLEND_SCREEN;
        break;
    case QPainter::CompositionMode_Darken:
        vgMode = VG_BLEND_DARKEN;
        break;
    case QPainter::CompositionMode_Lighten:
        vgMode = VG_BLEND_LIGHTEN;
        break;
    default:
        if (d->hasAdvancedBlending) {
            switch (state()->composition_mode) {
            case QPainter::CompositionMode_Overlay:
                vgMode = QVGPaintEnginePrivate::QT_VG_BLEND_OVERLAY_KHR;
                break;
            case QPainter::CompositionMode_ColorDodge:
                vgMode = QVGPaintEnginePrivate::QT_VG_BLEND_COLORDODGE_KHR;
                break;
            case QPainter::CompositionMode_ColorBurn:
                vgMode = QVGPaintEnginePrivate::QT_VG_BLEND_COLORBURN_KHR;
                break;
            case QPainter::CompositionMode_HardLight:
                vgMode = QVGPaintEnginePrivate::QT_VG_BLEND_HARDLIGHT_KHR;
                break;
            case QPainter::CompositionMode_SoftLight:
                vgMode = QVGPaintEnginePrivate::QT_VG_BLEND_SOFTLIGHT_KHR;
                break;
            case QPainter::CompositionMode_Difference:
                vgMode = QVGPaintEnginePrivate::QT_VG_BLEND_DIFFERENCE_KHR;
                break;
            case QPainter::CompositionMode_Exclusion:
                vgMode = QVGPaintEnginePrivate::QT_VG_BLEND_EXCLUSION_KHR;
                break;
            case QPainter::CompositionMode_SourceOut:
                vgMode = QVGPaintEnginePrivate::QT_VG_BLEND_SRC_OUT_KHR;
                break;
            case QPainter::CompositionMode_DestinationOut:
                vgMode = QVGPaintEnginePrivate::QT_VG_BLEND_DST_OUT_KHR;
                break;
            case QPainter::CompositionMode_SourceAtop:
                vgMode = QVGPaintEnginePrivate::QT_VG_BLEND_SRC_ATOP_KHR;
                break;
            case QPainter::CompositionMode_DestinationAtop:
                vgMode = QVGPaintEnginePrivate::QT_VG_BLEND_DST_ATOP_KHR;
                break;
            case QPainter::CompositionMode_Xor:
                vgMode = QVGPaintEnginePrivate::QT_VG_BLEND_XOR_KHR;
                break;
            default: break; // Fall back to VG_BLEND_SRC_OVER.
            }
        }
        if (vgMode == VG_BLEND_SRC_OVER)
            qWarning() << "QVGPaintEngine::compositionModeChanged unsupported mode" << state()->composition_mode;
        break;
    }

    d->setBlendMode(VGBlendMode(vgMode));
}

createState()

QPainterState * QVGPaintEngine::createState ( QPainterState *  orig ) const

virtual

Reimplemented from QPaintEngineEx.

Definition at line 1484 of file qpaintengine_vg.cpp.

{
    if (!orig) {
        return new QVGPainterState();
    } else {
        Q_D(const QVGPaintEngine);
        QVGPaintEnginePrivate *d2 = const_cast<QVGPaintEnginePrivate*>(d);
        QVGPainterState *origState = static_cast<QVGPainterState *>(orig);
        origState->savedDirty = d2->dirty;
        d2->dirty = 0;
        return new QVGPainterState(*origState);
    }
}

defaultClipRegion()

QRegion QVGPaintEngine::defaultClipRegion ( )

private

Definition at line 2349 of file qpaintengine_vg.cpp.

Referenced by begin(), clipEnabledChanged(), and clipTransformIsSimple().

{
    // The default clip region for a paint device is the whole drawing area.
    QPaintDevice *pdev = paintDevice();
    return QRegion(0, 0, pdev->width(), pdev->height());
}

draw()

void QVGPaintEngine::draw ( const QVectorPath &  path )

virtual

Reimplemented from QPaintEngineEx.

Definition at line 1566 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);
    if (d->needsEmulation()) {
        QPaintEngineEx::draw(path);
        return;
    }
    QVGPainterState *s = state();
    VGPath vgpath = d->vectorPathToVGPath(path);
    if (!path.hasWindingFill())
        d->draw(vgpath, s->pen, s->brush, VG_EVEN_ODD);
    else
        d->draw(vgpath, s->pen, s->brush, VG_NON_ZERO);
    vgDestroyPath(vgpath);
}

drawCachedGlyphs()

bool QVGPaintEngine::drawCachedGlyphs	(	int	numGlyphs,
		const glyph_t *	glyphs,
		const QFont &	font,
		QFontEngine *	fontEngine,
		const QPointF &	p,
		const QFixedPoint *	positions
	)

Definition at line 3743 of file qpaintengine_vg.cpp.

 {
#if !defined(QVG_NO_DRAW_GLYPHS)
    Q_D(QVGPaintEngine);

    // Find the glyph cache for this font.
    QVGFontCache::ConstIterator it = d->fontCache.constFind(fontEngine);
    QVGFontGlyphCache *glyphCache;
    if (it != d->fontCache.constEnd()) {
        glyphCache = it.value();
    } else {
#ifdef Q_OS_SYMBIAN
        glyphCache = new QSymbianVGFontGlyphCache();
#else
        glyphCache = new QVGFontGlyphCache();
#endif
        if (glyphCache->font == VG_INVALID_HANDLE) {
            qWarning("QVGPaintEngine::drawTextItem: OpenVG fonts are not supported by the OpenVG engine");
            delete glyphCache;
            return false;
        }
        glyphCache->setScaleFromText(font, fontEngine);
        d->fontCache.insert(fontEngine, glyphCache);
        if (!d->fontEngineCleaner)
            d->fontEngineCleaner = new QVGFontEngineCleaner(d);
        QObject::connect(fontEngine, SIGNAL(destroyed()),
                         d->fontEngineCleaner, SLOT(fontEngineDestroyed()));
    }

    // Set the transformation to use for drawing the current glyphs.
    QTransform glyphTransform(d->pathTransform);
    if (d->transform.type() <= QTransform::TxTranslate) {
        // Prevent blurriness of unscaled, unrotated text by forcing integer coordinates.
        glyphTransform.translate(
                floor(p.x() + glyphTransform.dx() + aliasedCoordinateDelta) - glyphTransform.dx(),
                floor(p.y() - glyphTransform.dy() + aliasedCoordinateDelta) + glyphTransform.dy());
    } else {
        glyphTransform.translate(p.x(), p.y());
    }
#if defined(QVG_NO_IMAGE_GLYPHS)
    glyphTransform.scale(glyphCache->scaleX, glyphCache->scaleY);
#endif

    // Some glyph caches can create the VGImage upright
    if (glyphCache->invertedGlyphs)
        glyphTransform.scale(1, -1);

    d->setTransform(VG_MATRIX_GLYPH_USER_TO_SURFACE, glyphTransform);

    // Add the glyphs from the text item into the glyph cache.
    glyphCache->cacheGlyphs(d, fontEngine, glyphs, numGlyphs);

    // Create the array of adjustments between glyphs
    QVarLengthArray<VGfloat> adjustments_x(numGlyphs);
    QVarLengthArray<VGfloat> adjustments_y(numGlyphs);
    for (int i = 1; i < numGlyphs; ++i) {
        adjustments_x[i-1] = (positions[i].x - positions[i-1].x).round().toReal();
        adjustments_y[i-1] = (positions[i].y - positions[i-1].y).round().toReal();
    }

    // Set the glyph drawing origin.
    VGfloat origin[2];
    origin[0] = positions[0].x.round().toReal();
    origin[1] = positions[0].y.round().toReal();
    vgSetfv(VG_GLYPH_ORIGIN, 2, origin);

    // Fast anti-aliasing for paths, better for images.
#if !defined(QVG_NO_IMAGE_GLYPHS)
    d->setImageQuality(VG_IMAGE_QUALITY_BETTER);
    d->setImageMode(VG_DRAW_IMAGE_STENCIL);
#else
    d->setRenderingQuality(VG_RENDERING_QUALITY_FASTER);
#endif

    // Draw the glyphs.  We need to fill with the brush associated with
    // the Qt pen, not the Qt brush.
    d->ensureBrush(state()->pen.brush());
    vgDrawGlyphs(glyphCache->font, numGlyphs, (VGuint*)glyphs,
                 adjustments_x.data(), adjustments_y.data(), VG_FILL_PATH, VG_TRUE);
    return true;
#else
    Q_UNUSED(numGlyphs);
    Q_UNUSED(glyphs);
    Q_UNUSED(font);
    Q_UNUSED(fontEngine);
    Q_UNUSED(p);
    Q_UNUSED(positions);
    return false;
#endif
}

drawEllipse() [1/2]

void QVGPaintEngine::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 QPaintEngineEx.

Definition at line 2851 of file qpaintengine_vg.cpp.

Referenced by drawEllipse().

{
    // Based on the description of vguEllipse() in the OpenVG specification.
    // We don't use vguEllipse(), to avoid unnecessary library dependencies.
    Q_D(QVGPaintEngine);
    if (d->needsEmulation()) {
        QPaintEngineEx::drawEllipse(r);
        return;
    }
    if (d->simpleTransform) {
        QVGPainterState *s = state();
        VGPath path = vgCreatePath(VG_PATH_FORMAT_STANDARD,
                                   VG_PATH_DATATYPE_F,
                                   1.0f, // scale
                                   0.0f, // bias
                                   4,    // segmentCapacityHint
                                   12,   // coordCapacityHint
                                   VG_PATH_CAPABILITY_ALL);
        static VGubyte segments[4] = {
            VG_MOVE_TO_ABS,
            VG_SCCWARC_TO_REL,
            VG_SCCWARC_TO_REL,
            VG_CLOSE_PATH
        };
        VGfloat coords[12];
        VGfloat halfwid = r.width() / 2;
        VGfloat halfht = r.height() / 2;
        coords[0]  = r.x() + r.width();
        coords[1]  = r.y() + halfht;
        coords[2]  = halfwid;
        coords[3]  = halfht;
        coords[4]  = 0.0f;
        coords[5]  = -r.width();
        coords[6]  = 0.0f;
        coords[7]  = halfwid;
        coords[8]  = halfht;
        coords[9]  = 0.0f;
        coords[10] = r.width();
        coords[11] = 0.0f;
        vgAppendPathData(path, 4, segments, coords);
        d->draw(path, s->pen, s->brush);
        vgDestroyPath(path);
    } else {
        // The projective transform version of an ellipse is difficult.
        // Generate a QVectorPath containing cubic curves and transform that.
        QPaintEngineEx::drawEllipse(r);
    }
}

drawEllipse() [2/2]

void QVGPaintEngine::drawEllipse ( const QRect &  r )

virtual

The default implementation of this function calls the floating point version of this function.

Reimplemented from QPaintEngineEx.

Definition at line 2900 of file qpaintengine_vg.cpp.

{
    drawEllipse(QRectF(r));
}

drawImage() [1/2]

void QVGPaintEngine::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.

Implements QPaintEngineEx.

Definition at line 3384 of file qpaintengine_vg.cpp.

Referenced by drawPixmap().

{
    Q_D(QVGPaintEngine);
    if (image.isNull())
        return;
    VGImage vgImg;
    if (d->simpleTransform || d->opacity == 1.0f)
        vgImg = toVGImageSubRect(image, sr.toRect(), flags);
    else
        vgImg = toVGImageWithOpacitySubRect(image, d->opacity, sr.toRect());
    if (vgImg != VG_INVALID_HANDLE) {
        if (r.size() == sr.size()) {
            drawVGImage(d, r.topLeft(), vgImg);
        } else {
            drawVGImage(d, r, vgImg, sr.size().toSize(),
                        QRectF(QPointF(0, 0), sr.size()));
        }
    } else {
        if (canVgWritePixels(image) && (r.size() == sr.size()) && !flags) {
            // Optimization for straight blits, no blending
            int x = sr.x();
            int y = sr.y();
            int bpp = image.depth() >> 3; // bytes
            int offset = 0;
            int bpl = image.bytesPerLine();
            if (d->imageTransform.m22() < 0) {
                // inverted
                offset = ((y + sr.height()) * bpl) - ((image.width() - x) * bpp);
                bpl = -bpl;
            } else {
                offset = (y * bpl) + (x * bpp);
            }
            const uchar *bits = image.constBits() + offset;

            QPointF mapped = d->imageTransform.map(r.topLeft());
            vgWritePixels(bits, bpl, qt_vg_image_to_vg_format(image.format()),
                        mapped.x(), mapped.y() - sr.height(), r.width(), r.height());
            return;
        } else {
            // Monochrome images need to use the vgChildImage() path.
            vgImg = toVGImage(image, flags);
            if (vgImg == VG_INVALID_HANDLE)
                drawImageTiled(d, r, image, sr);
            else
                drawVGImage(d, r, vgImg, image.size(), sr);
        }
    }
    vgDestroyImage(vgImg);
}

drawImage() [2/2]

void QVGPaintEngine::drawImage ( const QPointF &  pos, const QImage &  image  )

virtual

Reimplemented from QPaintEngineEx.

Definition at line 3435 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);
    if (image.isNull())
        return;
    VGImage vgImg;
    if (canVgWritePixels(image)) {
        // Optimization for straight blits, no blending
        bool inverted = (d->imageTransform.m22() < 0);
        const uchar *bits = inverted ? image.constBits() + image.byteCount() - image.bytesPerLine() : image.constBits();
        int bpl = inverted ? -image.bytesPerLine() : image.bytesPerLine();

        QPointF mapped = d->imageTransform.map(pos);
        vgWritePixels(bits, bpl, qt_vg_image_to_vg_format(image.format()),
                             mapped.x(), mapped.y() - image.height(), image.width(), image.height());
        return;
    } else if (d->simpleTransform || d->opacity == 1.0f) {
        vgImg = toVGImage(image);
    } else {
        vgImg = toVGImageWithOpacity(image, d->opacity);
    }
    if (vgImg == VG_INVALID_HANDLE)
        drawImageTiled(d, QRectF(pos, image.size()), image);
    else
        drawVGImage(d, pos, vgImg);
    vgDestroyImage(vgImg);
}

drawLines() [1/2]

void QVGPaintEngine::drawLines ( const QLine *  lines, int  lineCount  )

virtual

The default implementation converts the first lineCount lines in lines to a QLineF and calls the floating point version of this function.

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

Reimplemented from QPaintEngineEx.

Definition at line 2787 of file qpaintengine_vg.cpp.

{
#if !defined(QVG_NO_MODIFY_PATH)
    Q_D(QVGPaintEngine);
    if (d->needsEmulation()) {
        QPaintEngineEx::drawLines(lines, lineCount);
        return;
    }
    QVGPainterState *s = state();
    for (int i = 0; i < lineCount; ++i, ++lines) {
        VGfloat coords[4];
        if (d->simpleTransform) {
            coords[0] = lines->x1();
            coords[1] = lines->y1();
            coords[2] = lines->x2();
            coords[3] = lines->y2();
        } else {
            QPointF p1 = d->transform.map(QPointF(lines->x1(), lines->y1()));
            QPointF p2 = d->transform.map(QPointF(lines->x2(), lines->y2()));
            coords[0] = p1.x();
            coords[1] = p1.y();
            coords[2] = p2.x();
            coords[3] = p2.y();
        }
        vgModifyPathCoords(d->linePath, 0, 2, coords);
        d->stroke(d->linePath, s->pen);
    }
#else
    QPaintEngineEx::drawLines(lines, lineCount);
#endif
}

drawLines() [2/2]

void QVGPaintEngine::drawLines ( const QLineF *  lines, int  lineCount  )

virtual

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.

Reimplemented from QPaintEngineEx.

Definition at line 2819 of file qpaintengine_vg.cpp.

{
#if !defined(QVG_NO_MODIFY_PATH)
    Q_D(QVGPaintEngine);
    if (d->needsEmulation()) {
        QPaintEngineEx::drawLines(lines, lineCount);
        return;
    }
    QVGPainterState *s = state();
    for (int i = 0; i < lineCount; ++i, ++lines) {
        VGfloat coords[4];
        if (d->simpleTransform) {
            coords[0] = lines->x1();
            coords[1] = lines->y1();
            coords[2] = lines->x2();
            coords[3] = lines->y2();
        } else {
            QPointF p1 = d->transform.map(lines->p1());
            QPointF p2 = d->transform.map(lines->p2());
            coords[0] = p1.x();
            coords[1] = p1.y();
            coords[2] = p2.x();
            coords[3] = p2.y();
        }
        vgModifyPathCoords(d->linePath, 0, 2, coords);
        d->stroke(d->linePath, s->pen);
    }
#else
    QPaintEngineEx::drawLines(lines, lineCount);
#endif
}

drawPath()

void QVGPaintEngine::drawPath ( const QPainterPath &  path )

virtual

The default implementation ignores the path and does nothing.

Reimplemented from QPaintEngineEx.

Definition at line 2905 of file qpaintengine_vg.cpp.

{
    // Shortcut past the QPainterPath -> QVectorPath conversion,
    // converting the QPainterPath directly into a VGPath.
    Q_D(QVGPaintEngine);
    if (d->needsEmulation()) {
        QPaintEngineEx::drawPath(path);
        return;
    }
    QVGPainterState *s = state();
    VGPath vgpath = d->painterPathToVGPath(path);
    if (path.fillRule() == Qt::OddEvenFill)
        d->draw(vgpath, s->pen, s->brush, VG_EVEN_ODD);
    else
        d->draw(vgpath, s->pen, s->brush, VG_NON_ZERO);
    vgDestroyPath(vgpath);
}

drawPixmap() [1/2]

void QVGPaintEngine::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 QPaintEngineEx.

Definition at line 3331 of file qpaintengine_vg.cpp.

{
    QPixmapData *pd = pm.pixmapData();
    if (!pd)
        return; // null QPixmap
    if (pd->classId() == QPixmapData::OpenVGClass) {
        Q_D(QVGPaintEngine);
        QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
        if (!vgpd->isValid())
            return;
        if (d->simpleTransform)
            drawVGImage(d, r, vgpd->toVGImage(), vgpd->size(), sr);
        else
            drawVGImage(d, r, vgpd->toVGImage(d->opacity), vgpd->size(), sr);

        if (vgpd->vgImage != VG_INVALID_HANDLE)
            return;

        vgpd->source.beginDataAccess();
        drawImage(r, vgpd->source.imageRef(), sr, Qt::AutoColor);
        vgpd->source.endDataAccess(true);
    } else {
        drawImage(r, *(pd->buffer()), sr, Qt::AutoColor);
    }
}

drawPixmap() [2/2]

void QVGPaintEngine::drawPixmap ( const QPointF &  pos, const QPixmap &  pm  )

virtual

Reimplemented from QPaintEngineEx.

Definition at line 3357 of file qpaintengine_vg.cpp.

{
    QPixmapData *pd = pm.pixmapData();
    if (!pd)
        return; // null QPixmap
    if (pd->classId() == QPixmapData::OpenVGClass) {
        Q_D(QVGPaintEngine);
        QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
        if (!vgpd->isValid())
            return;
        if (d->simpleTransform)
            drawVGImage(d, pos, vgpd->toVGImage());
        else
            drawVGImage(d, pos, vgpd->toVGImage(d->opacity));

        if (vgpd->vgImage != VG_INVALID_HANDLE)
            return;

        vgpd->source.beginDataAccess();
        drawImage(pos, vgpd->source.imageRef());
        vgpd->source.endDataAccess(true);
    } else {
        drawImage(pos, *(pd->buffer()));
    }
}

drawPixmapFragments()

void QVGPaintEngine::drawPixmapFragments	(	const QPainter::PixmapFragment *	drawingData,
		int	dataCount,
		const QPixmap &	pixmap,
		QFlags< QPainter::PixmapFragmentHint >	hints
	)

Definition at line 3476 of file qpaintengine_vg.cpp.

{
#if !defined(QT_SHIVAVG)
    Q_D(QVGPaintEngine);

    // If the pixmap is not VG, or the transformation is projective,
    // then fall back to the default implementation.
    QPixmapData *pd = pixmap.pixmapData();
    if (!pd)
        return; // null QPixmap
    if (pd->classId() != QPixmapData::OpenVGClass || !d->simpleTransform) {
        QPaintEngineEx::drawPixmapFragments(drawingData, dataCount, pixmap, hints);
        return;
    }

    // Bail out if nothing to do.
    if (dataCount <= 0)
        return;

    // Bail out if we don't have a usable VGImage for the pixmap.
    QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
    if (!vgpd->isValid())
        return;
    VGImage vgImg = vgpd->toVGImage();
    if (vgImg == VG_INVALID_HANDLE)
        return;

    // We cache the results of any vgChildImage() calls because the
    // same child is very likely to be used over and over in particle
    // systems.  However, performance is even better if vgChildImage()
    // isn't needed at all, so use full source rects where possible.
    QVarLengthArray<VGImage> cachedImages;
    QVarLengthArray<QRect> cachedSources;

    // Select the opacity paint object.
    if ((hints & QPainter::OpaqueHint) != 0 && d->opacity == 1.0f) {
        d->setImageMode(VG_DRAW_IMAGE_NORMAL);
    }  else {
        hints = 0;
        if (d->fillPaint != d->opacityPaint) {
            vgSetPaint(d->opacityPaint, VG_FILL_PATH);
            d->fillPaint = d->opacityPaint;
        }
    }

    for (int i = 0; i < dataCount; ++i) {
        QTransform transform(d->imageTransform);
        transform.translate(drawingData[i].x, drawingData[i].y);
        transform.rotate(drawingData[i].rotation);

        VGImage child;
        QSize imageSize = vgpd->size();
        QRectF sr(drawingData[i].sourceLeft, drawingData[i].sourceTop,
                  drawingData[i].width, drawingData[i].height);
        if (sr.topLeft().isNull() && sr.size() == imageSize) {
            child = vgImg;
        } else {
            // Look for a previous child with the same source rectangle
            // to avoid constantly calling vgChildImage()/vgDestroyImage().
            QRect src = sr.toRect();
            int j;
            for (j = 0; j < cachedSources.size(); ++j) {
                if (cachedSources[j] == src)
                    break;
            }
            if (j < cachedSources.size()) {
                child = cachedImages[j];
            } else {
                child = vgChildImage
                    (vgImg, src.x(), src.y(), src.width(), src.height());
                cachedImages.append(child);
                cachedSources.append(src);
            }
        }

        VGfloat scaleX = drawingData[i].scaleX;
        VGfloat scaleY = drawingData[i].scaleY;
        transform.translate(-0.5 * scaleX * sr.width(),
                            -0.5 * scaleY * sr.height());
        transform.scale(scaleX, scaleY);
        d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, transform);

        if ((hints & QPainter::OpaqueHint) == 0) {
            qreal opacity = d->opacity * drawingData[i].opacity;
            if (opacity != 1.0f) {
                if (d->paintOpacity != opacity) {
                    VGfloat values[4];
                    values[0] = 1.0f;
                    values[1] = 1.0f;
                    values[2] = 1.0f;
                    values[3] = opacity;
                    d->paintOpacity = opacity;
                    vgSetParameterfv
                        (d->opacityPaint, VG_PAINT_COLOR, 4, values);
                }
                d->setImageMode(VG_DRAW_IMAGE_MULTIPLY);
            } else {
                d->setImageMode(VG_DRAW_IMAGE_NORMAL);
            }
        }

        vgDrawImage(child);
    }

    // Destroy the cached child sub-images.
    for (int i = 0; i < cachedImages.size(); ++i)
        vgDestroyImage(cachedImages[i]);
#else
    QPaintEngineEx::drawPixmapFragments(drawingData, dataCount, pixmap, hints);
#endif
}

drawPoints() [1/2]

void QVGPaintEngine::drawPoints ( const QPointF *  points, int  pointCount  )

virtual

Draws the first pointCount points in the buffer points.

Reimplemented from QPaintEngineEx.

Definition at line 2923 of file qpaintengine_vg.cpp.

{
#if !defined(QVG_NO_MODIFY_PATH)
    Q_D(QVGPaintEngine);

    if (d->needsPenEmulation()) {
        QPaintEngineEx::drawPoints(points, pointCount);
        return;
    }

    // Set up a new pen if necessary.
    QPen pen = state()->pen;
    if (pen.style() == Qt::NoPen)
        return;
    if (pen.capStyle() == Qt::FlatCap)
        pen.setCapStyle(Qt::SquareCap);

    for (int i = 0; i < pointCount; ++i, ++points) {
        VGfloat coords[4];
        if (d->simpleTransform) {
            coords[0] = points->x();
            coords[1] = points->y();
            coords[2] = coords[0];
            coords[3] = coords[1];
        } else {
            QPointF p = d->transform.map(*points);
            coords[0] = p.x();
            coords[1] = p.y();
            coords[2] = coords[0];
            coords[3] = coords[1];
        }
        vgModifyPathCoords(d->linePath, 0, 2, coords);
        d->stroke(d->linePath, pen);
    }
#else
    QPaintEngineEx::drawPoints(points, pointCount);
#endif
}

drawPoints() [2/2]

void QVGPaintEngine::drawPoints ( const QPoint *  points, int  pointCount  )

virtual

Draws the first pointCount points in the buffer points.

The default implementation converts the first pointCount QPoints in points to QPointFs and calls the floating point version of drawPoints.

Reimplemented from QPaintEngineEx.

Definition at line 2962 of file qpaintengine_vg.cpp.

{
#if !defined(QVG_NO_MODIFY_PATH)
    Q_D(QVGPaintEngine);

    if (d->needsEmulation()) {
        QPaintEngineEx::drawPoints(points, pointCount);
        return;
    }

    // Set up a new pen if necessary.
    QPen pen = state()->pen;
    if (pen.style() == Qt::NoPen)
        return;
    if (pen.capStyle() == Qt::FlatCap)
        pen.setCapStyle(Qt::SquareCap);

    for (int i = 0; i < pointCount; ++i, ++points) {
        VGfloat coords[4];
        if (d->simpleTransform) {
            coords[0] = points->x();
            coords[1] = points->y();
            coords[2] = coords[0];
            coords[3] = coords[1];
        } else {
            QPointF p = d->transform.map(QPointF(*points));
            coords[0] = p.x();
            coords[1] = p.y();
            coords[2] = coords[0];
            coords[3] = coords[1];
        }
        vgModifyPathCoords(d->linePath, 0, 2, coords);
        d->stroke(d->linePath, pen);
    }
#else
    QPaintEngineEx::drawPoints(points, pointCount);
#endif
}

drawPolygon() [1/2]

void QVGPaintEngine::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 QPaintEngineEx.

Definition at line 3001 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);

    if (d->needsEmulation()) {
        QPaintEngineEx::drawPolygon(points, pointCount, mode);
        return;
    }

    QVGPainterState *s = state();
    VGPath path = vgCreatePath(VG_PATH_FORMAT_STANDARD,
                               VG_PATH_DATATYPE_F,
                               1.0f,             // scale
                               0.0f,             // bias
                               pointCount + 1,   // segmentCapacityHint
                               pointCount * 2,   // coordCapacityHint
                               VG_PATH_CAPABILITY_ALL);
    QVarLengthArray<VGfloat, 16> coords;
    QVarLengthArray<VGubyte, 10> segments;
    for (int i = 0; i < pointCount; ++i, ++points) {
        if (d->simpleTransform) {
            coords.append(points->x());
            coords.append(points->y());
        } else {
            QPointF temp = d->transform.map(*points);
            coords.append(temp.x());
            coords.append(temp.y());
        }
        if (i == 0)
            segments.append(VG_MOVE_TO_ABS);
        else
            segments.append(VG_LINE_TO_ABS);
    }
    if (mode != QPaintEngine::PolylineMode)
        segments.append(VG_CLOSE_PATH);
    vgAppendPathData(path, segments.count(),
                     segments.constData(), coords.constData());
    switch (mode) {
        case QPaintEngine::WindingMode:
            d->draw(path, s->pen, s->brush, VG_NON_ZERO);
            break;

        case QPaintEngine::PolylineMode:
            d->stroke(path, s->pen);
            break;

        default:
            d->draw(path, s->pen, s->brush, VG_EVEN_ODD);
            break;
    }
    vgDestroyPath(path);
}

drawPolygon() [2/2]

void QVGPaintEngine::drawPolygon ( const QPoint *  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.

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

Note

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

Reimplemented from QPaintEngineEx.

Definition at line 3054 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);

    if (d->needsEmulation()) {
        QPaintEngineEx::drawPolygon(points, pointCount, mode);
        return;
    }

    QVGPainterState *s = state();
    VGPath path = vgCreatePath(VG_PATH_FORMAT_STANDARD,
                               VG_PATH_DATATYPE_F,
                               1.0f,             // scale
                               0.0f,             // bias
                               pointCount + 1,   // segmentCapacityHint
                               pointCount * 2,   // coordCapacityHint
                               VG_PATH_CAPABILITY_ALL);
    QVarLengthArray<VGfloat, 16> coords;
    QVarLengthArray<VGubyte, 10> segments;
    for (int i = 0; i < pointCount; ++i, ++points) {
        if (d->simpleTransform) {
            coords.append(points->x());
            coords.append(points->y());
        } else {
            QPointF temp = d->transform.map(QPointF(*points));
            coords.append(temp.x());
            coords.append(temp.y());
        }
        if (i == 0)
            segments.append(VG_MOVE_TO_ABS);
        else
            segments.append(VG_LINE_TO_ABS);
    }
    if (mode != QPaintEngine::PolylineMode)
        segments.append(VG_CLOSE_PATH);
    vgAppendPathData(path, segments.count(),
                     segments.constData(), coords.constData());
    switch (mode) {
        case QPaintEngine::WindingMode:
            d->draw(path, s->pen, s->brush, VG_NON_ZERO);
            break;

        case QPaintEngine::PolylineMode:
            d->stroke(path, s->pen);
            break;

        default:
            d->draw(path, s->pen, s->brush, VG_EVEN_ODD);
            break;
    }
    vgDestroyPath(path);
}

drawRects() [1/2]

void QVGPaintEngine::drawRects ( const QRect *  rects, int  rectCount  )

virtual

The default implementation converts the first rectCount rectangles in the buffer rects to a QRectF and calls the floating point version of this function.

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

Reimplemented from QPaintEngineEx.

Definition at line 2700 of file qpaintengine_vg.cpp.

{
#if !defined(QVG_NO_MODIFY_PATH)
    Q_D(QVGPaintEngine);
    if (d->needsEmulation()) {
        QPaintEngineEx::drawRects(rects, rectCount);
        return;
    }
    QVGPainterState *s = state();
    for (int i = 0; i < rectCount; ++i, ++rects) {
        VGfloat coords[8];
        if (d->simpleTransform) {
            coords[0] = rects->x();
            coords[1] = rects->y();
            coords[2] = rects->x() + rects->width();
            coords[3] = coords[1];
            coords[4] = coords[2];
            coords[5] = rects->y() + rects->height();
            coords[6] = coords[0];
            coords[7] = coords[5];
        } else {
            QPointF tl = d->transform.map(QPointF(rects->x(), rects->y()));
            QPointF tr = d->transform.map(QPointF(rects->x() + rects->width(),
                                                  rects->y()));
            QPointF bl = d->transform.map(QPointF(rects->x(),
                                                  rects->y() + rects->height()));
            QPointF br = d->transform.map(QPointF(rects->x() + rects->width(),
                                                  rects->y() + rects->height()));
            coords[0] = tl.x();
            coords[1] = tl.y();
            coords[2] = tr.x();
            coords[3] = tr.y();
            coords[4] = br.x();
            coords[5] = br.y();
            coords[6] = bl.x();
            coords[7] = bl.y();
        }
        vgModifyPathCoords(d->rectPath, 0, 4, coords);
        d->draw(d->rectPath, s->pen, s->brush);
    }
#else
    QPaintEngineEx::drawRects(rects, rectCount);
#endif
}

drawRects() [2/2]

void QVGPaintEngine::drawRects ( const QRectF *  rects, int  rectCount  )

virtual

Draws the first rectCount rectangles in the buffer rects.

The default implementation of this function calls drawPath() or drawPolygon() depending on the feature set of the paint engine.

Reimplemented from QPaintEngineEx.

Definition at line 2745 of file qpaintengine_vg.cpp.

{
#if !defined(QVG_NO_MODIFY_PATH)
    Q_D(QVGPaintEngine);
    if (d->needsEmulation()) {
        QPaintEngineEx::drawRects(rects, rectCount);
        return;
    }
    QVGPainterState *s = state();
    for (int i = 0; i < rectCount; ++i, ++rects) {
        VGfloat coords[8];
        if (d->simpleTransform) {
            coords[0] = rects->x();
            coords[1] = rects->y();
            coords[2] = rects->x() + rects->width();
            coords[3] = coords[1];
            coords[4] = coords[2];
            coords[5] = rects->y() + rects->height();
            coords[6] = coords[0];
            coords[7] = coords[5];
        } else {
            QPointF tl = d->transform.map(rects->topLeft());
            QPointF tr = d->transform.map(rects->topRight());
            QPointF bl = d->transform.map(rects->bottomLeft());
            QPointF br = d->transform.map(rects->bottomRight());
            coords[0] = tl.x();
            coords[1] = tl.y();
            coords[2] = tr.x();
            coords[3] = tr.y();
            coords[4] = br.x();
            coords[5] = br.y();
            coords[6] = bl.x();
            coords[7] = bl.y();
        }
        vgModifyPathCoords(d->rectPath, 0, 4, coords);
        d->draw(d->rectPath, s->pen, s->brush);
    }
#else
    QPaintEngineEx::drawRects(rects, rectCount);
#endif
}

drawRoundedRect()

void QVGPaintEngine::drawRoundedRect ( const QRectF &  rect, qreal  xrad, qreal  yrad, Qt::SizeMode  mode  )

virtual

Reimplemented from QPaintEngineEx.

Definition at line 2681 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);
    if (d->needsEmulation()) {
        QPaintEngineEx::drawRoundedRect(rect, xrad, yrad, mode);
        return;
    }
    if (d->simpleTransform) {
        QVGPainterState *s = state();
        VGPath vgpath = d->roundedRectPath(rect, xrad, yrad, mode);
        d->draw(vgpath, s->pen, s->brush);
#if defined(QVG_NO_MODIFY_PATH)
        vgDestroyPath(vgpath);
#endif
    } else {
        QPaintEngineEx::drawRoundedRect(rect, xrad, yrad, mode);
    }
}

drawStaticTextItem()

void QVGPaintEngine::drawStaticTextItem ( QStaticTextItem *  staticTextItem )

virtual

Reimplemented from QPaintEngineEx.

Definition at line 3737 of file qpaintengine_vg.cpp.

{
    drawCachedGlyphs(textItem->numGlyphs, textItem->glyphs, textItem->font, textItem->fontEngine(),
                     QPointF(0, 0), textItem->glyphPositions);
}

drawTextItem()

void QVGPaintEngine::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 3704 of file qpaintengine_vg.cpp.

{
#if !defined(QVG_NO_DRAW_GLYPHS)
    Q_D(QVGPaintEngine);
    const QTextItemInt &ti = static_cast<const QTextItemInt &>(textItem);

    // If we are not using a simple transform, then fall back
    // to the default Qt path stroking algorithm.
    if (!d->simpleTransform) {
        QPaintEngineEx::drawTextItem(p, textItem);
        return;
    }

    if (d->needsPenEmulation()) {
        QPaintEngineEx::drawTextItem(p, textItem);
        return;
    }

    // Get the glyphs and positions associated with the text item.
    QVarLengthArray<QFixedPoint> positions;
    QVarLengthArray<glyph_t> glyphs;
    QTransform matrix;
    ti.fontEngine->getGlyphPositions(ti.glyphs, matrix, ti.flags, glyphs, positions);

    if (!drawCachedGlyphs(glyphs.size(), glyphs.data(), ti.font(), ti.fontEngine, p, positions.data()))
        QPaintEngineEx::drawTextItem(p, textItem);
#else
    // OpenGL 1.0 does not have support for VGFont and glyphs,
    // so fall back to the default Qt path stroking algorithm.
    QPaintEngineEx::drawTextItem(p, textItem);
#endif
}

drawTiledPixmap()

void QVGPaintEngine::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 QPaintEngineEx.

Definition at line 3464 of file qpaintengine_vg.cpp.

Referenced by drawImage().

{
    QBrush brush(state()->pen.color(), pixmap);
    QTransform xform = QTransform::fromTranslate(r.x() - s.x(), r.y() - s.y());
    brush.setTransform(xform);
    fillRect(r, brush);
}

end()

bool QVGPaintEngine::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 1559 of file qpaintengine_vg.cpp.

{
    vgSeti(VG_SCISSORING, VG_FALSE);
    vgSeti(VG_MASKING, VG_FALSE);
    return true;
}

endNativePainting()

void QVGPaintEngine::endNativePainting ( )

virtual

Reimplemented from QPaintEngineEx.

Definition at line 3872 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);
    // Exiting raw VG mode: force all state values to be
    // explicitly set on the VG engine to undo any changes
    // that were made by the raw VG function calls.
    QPaintEngine::DirtyFlags dirty = d->dirty;
    d->clearModes();
    d->forcePenChange = true;
    d->forceBrushChange = true;
    d->penType = (VGPaintType)0;
    d->brushType = (VGPaintType)0;
    d->clearColor = QColor();
    d->fillPaint = d->brushPaint;
    d->scissorDirty = true;
    restoreState(QPaintEngine::AllDirty);
    d->dirty = dirty;
    d->rawVG = false;
    vgSetPaint(d->penPaint, VG_STROKE_PATH);
    vgSetPaint(d->brushPaint, VG_FILL_PATH);
}

fill()

void QVGPaintEngine::fill ( const QVectorPath &  path, const QBrush &  brush  )

virtual

Implements QPaintEngineEx.

Definition at line 1584 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);
    if (d->needsEmulation(brush)) {
        QPainter *p = painter();
        QBrush oldBrush = p->brush();
        p->setBrush(brush);
        qt_draw_helper(p->d_ptr.data(), qt_painterPathFromVectorPath(path), QPainterPrivate::FillDraw);
        p->setBrush(oldBrush);
        return;
    }
    VGPath vgpath = d->vectorPathToVGPath(path);
    if (!path.hasWindingFill())
        d->fill(vgpath, brush, VG_EVEN_ODD);
    else
        d->fill(vgpath, brush, VG_NON_ZERO);
    vgDestroyPath(vgpath);
}

fillRect() [1/2]

void QVGPaintEngine::fillRect ( const QRectF &  rect, const QBrush &  brush  )

virtual

Reimplemented from QPaintEngineEx.

Definition at line 2588 of file qpaintengine_vg.cpp.

Referenced by drawTiledPixmap().

{
    Q_D(QVGPaintEngine);

    if (brush.style() == Qt::NoBrush)
        return;

    // Check to see if we can use vgClear() for faster filling.
    if (brush.style() == Qt::SolidPattern && brush.isOpaque() &&
            clipTransformIsSimple(d->transform) && d->opacity == 1.0f &&
            clearRect(rect, brush.color())) {
        return;
    }

    if (d->needsEmulation(brush)) {
        QPaintEngineEx::fillRect(rect, brush);
        return;
    }

#if !defined(QVG_NO_MODIFY_PATH)
    VGfloat coords[8];
    if (d->simpleTransform) {
        coords[0] = rect.x();
        coords[1] = rect.y();
        coords[2] = rect.x() + rect.width();
        coords[3] = coords[1];
        coords[4] = coords[2];
        coords[5] = rect.y() + rect.height();
        coords[6] = coords[0];
        coords[7] = coords[5];
    } else {
        QPointF tl = d->transform.map(rect.topLeft());
        QPointF tr = d->transform.map(rect.topRight());
        QPointF bl = d->transform.map(rect.bottomLeft());
        QPointF br = d->transform.map(rect.bottomRight());
        coords[0] = tl.x();
        coords[1] = tl.y();
        coords[2] = tr.x();
        coords[3] = tr.y();
        coords[4] = br.x();
        coords[5] = br.y();
        coords[6] = bl.x();
        coords[7] = bl.y();
    }
    vgModifyPathCoords(d->rectPath, 0, 4, coords);
    d->fill(d->rectPath, brush);
#else
    QPaintEngineEx::fillRect(rect, brush);
#endif
}

fillRect() [2/2]

void QVGPaintEngine::fillRect ( const QRectF &  rect, const QColor &  color  )

virtual

Reimplemented from QPaintEngineEx.

Definition at line 2639 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);

    // Check to see if we can use vgClear() for faster filling.
    if (clipTransformIsSimple(d->transform) && d->opacity == 1.0f && color.alpha() == 255 &&
            clearRect(rect, color)) {
        return;
    }

#if !defined(QVG_NO_MODIFY_PATH)
    VGfloat coords[8];
    if (d->simpleTransform) {
        coords[0] = rect.x();
        coords[1] = rect.y();
        coords[2] = rect.x() + rect.width();
        coords[3] = coords[1];
        coords[4] = coords[2];
        coords[5] = rect.y() + rect.height();
        coords[6] = coords[0];
        coords[7] = coords[5];
    } else {
        QPointF tl = d->transform.map(rect.topLeft());
        QPointF tr = d->transform.map(rect.topRight());
        QPointF bl = d->transform.map(rect.bottomLeft());
        QPointF br = d->transform.map(rect.bottomRight());
        coords[0] = tl.x();
        coords[1] = tl.y();
        coords[2] = tr.x();
        coords[3] = tr.y();
        coords[4] = br.x();
        coords[5] = br.y();
        coords[6] = bl.x();
        coords[7] = bl.y();
    }
    vgModifyPathCoords(d->rectPath, 0, 4, coords);
    d->fill(d->rectPath, QBrush(color));
#else
    QPaintEngineEx::fillRect(rect, QBrush(color));
#endif
}

fillRegion()

void QVGPaintEngine::fillRegion	(	const QRegion &	region,
		const QColor &	color,
		const QSize &	surfaceSize
	)

Definition at line 3961 of file qpaintengine_vg.cpp.

Referenced by QVGWindowSurface::beginPaint(), and restoreState().

{
    Q_D(QVGPaintEngine);
    if (d->clearColor != color || d->clearOpacity != 1.0f) {
        VGfloat values[4];
        values[0] = color.redF();
        values[1] = color.greenF();
        values[2] = color.blueF();
        values[3] = color.alphaF();
        vgSetfv(VG_CLEAR_COLOR, 4, values);
        d->clearColor = color;
        d->clearOpacity = 1.0f;
    }
    if (region.rectCount() == 1) {
        QRect r = region.boundingRect();
        vgClear(r.x(), surfaceSize.height() - r.y() - r.height(),
                r.width(), r.height());
    } else {
        const QVector<QRect> rects = region.rects();
        for (int i = 0; i < rects.size(); ++i) {
            QRect r = rects.at(i);
            vgClear(r.x(), surfaceSize.height() - r.y() - r.height(),
                    r.width(), r.height());
        }
    }
}

isDefaultClipRect()

bool QVGPaintEngine::isDefaultClipRect ( const QRect &  rect )

private

Definition at line 2370 of file qpaintengine_vg.cpp.

Referenced by clip().

{
    QPaintDevice *pdev = paintDevice();
    int width = pdev->width();
    int height = pdev->height();

    return (rect.x() == 0 && rect.y() == 0 &&
            rect.width() == width && rect.height() == height);
}

isDefaultClipRegion()

bool QVGPaintEngine::isDefaultClipRegion ( const QRegion &  region )

private

Definition at line 2356 of file qpaintengine_vg.cpp.

Referenced by clip(), and updateScissor().

{
    if (region.rectCount() != 1)
        return false;

    QPaintDevice *pdev = paintDevice();
    int width = pdev->width();
    int height = pdev->height();

    QRect rect = region.boundingRect();
    return (rect.x() == 0 && rect.y() == 0 &&
            rect.width() == width && rect.height() == height);
}

opacityChanged()

void QVGPaintEngine::opacityChanged ( )

virtual

Implements QPaintEngineEx.

Definition at line 2435 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);
    d->dirty |= QPaintEngine::DirtyOpacity;
    d->opacity = state()->opacity;
    d->forcePenChange = true;
    d->forceBrushChange = true;
}

penChanged()

void QVGPaintEngine::penChanged ( )

virtual

Implements QPaintEngineEx.

Definition at line 2409 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);
    d->dirty |= QPaintEngine::DirtyPen;

    d->hasExtendedRadialGradientPen =
        state()->pen.style() != Qt::NoPen && d->needsEmulation(state()->pen.brush());
}

pixmapFilter()

QPixmapFilter * QVGPaintEngine::pixmapFilter ( int  type, const QPixmapFilter *  prototype  )

virtual

Reimplemented from QPaintEngineEx.

Definition at line 3894 of file qpaintengine_vg.cpp.

{
#if !defined(QT_SHIVAVG)
    Q_D(QVGPaintEngine);
    switch (type) {
        case QPixmapFilter::ConvolutionFilter:
            if (!d->convolutionFilter)
                d->convolutionFilter.reset(new QVGPixmapConvolutionFilter);
            return d->convolutionFilter.data();
        case QPixmapFilter::ColorizeFilter:
            if (!d->colorizeFilter)
                d->colorizeFilter.reset(new QVGPixmapColorizeFilter);
            return d->colorizeFilter.data();
        case QPixmapFilter::DropShadowFilter:
            if (!d->dropShadowFilter)
                d->dropShadowFilter.reset(new QVGPixmapDropShadowFilter);
            return d->dropShadowFilter.data();
        case QPixmapFilter::BlurFilter:
            if (!d->blurFilter)
                d->blurFilter.reset(new QVGPixmapBlurFilter);
            return d->blurFilter.data();
        default: break;
    }
#endif
    return QPaintEngineEx::pixmapFilter(type, prototype);
}

renderHintsChanged()

void QVGPaintEngine::renderHintsChanged ( )

virtual

Implements QPaintEngineEx.

Definition at line 2532 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);
    d->dirty |= QPaintEngine::DirtyHints;

    QPainter::RenderHints hints = state()->renderHints;

    VGRenderingQuality rq =
            (hints & QPainter::Antialiasing)
                ? VG_RENDERING_QUALITY_BETTER
                : VG_RENDERING_QUALITY_NONANTIALIASED;
    VGImageQuality iq =
            (hints & QPainter::SmoothPixmapTransform)
                ? VG_IMAGE_QUALITY_BETTER
                : VG_IMAGE_QUALITY_NONANTIALIASED;

    d->setRenderingQuality(rq);
    d->setImageQuality(iq);
}

restoreState()

void QVGPaintEngine::restoreState ( QPaintEngine::DirtyFlags  dirty )

private

Definition at line 3921 of file qpaintengine_vg.cpp.

Referenced by begin().

{
    Q_D(QVGPaintEngine);

    // Restore the pen, brush, and other settings.
    if ((dirty & QPaintEngine::DirtyBrushOrigin) != 0)
        brushOriginChanged();
    d->fillRule = 0;
    d->clearColor = QColor();
    if ((dirty & QPaintEngine::DirtyOpacity) != 0)
        opacityChanged();
    if ((dirty & QPaintEngine::DirtyTransform) != 0)
        transformChanged();
    if ((dirty & QPaintEngine::DirtyCompositionMode) != 0)
        compositionModeChanged();
    if ((dirty & QPaintEngine::DirtyHints) != 0)
        renderHintsChanged();
    if ((dirty & (QPaintEngine::DirtyClipRegion |
                  QPaintEngine::DirtyClipPath |
                  QPaintEngine::DirtyClipEnabled)) != 0) {
        d->maskValid = false;
        d->maskIsSet = false;
        d->scissorMask = false;
        d->maskRect = QRect();
        d->scissorDirty = true;
        clipEnabledChanged();
    }

#if defined(QVG_SCISSOR_CLIP)
    if ((dirty & (QPaintEngine::DirtyClipRegion |
                  QPaintEngine::DirtyClipPath |
                  QPaintEngine::DirtyClipEnabled)) == 0) {
        updateScissor();
    }
#else
    updateScissor();
#endif
}

setState()

void QVGPaintEngine::setState ( QPainterState *  s )

virtual

Reimplemented from QPaintEngineEx.

Definition at line 3836 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);
    QPaintEngineEx::setState(s);
    QVGPainterState *ps = static_cast<QVGPainterState *>(s);
    if (ps->isNew) {
        // Newly created state object.  The call to setState()
        // will either be followed by a call to begin(), or we are
        // setting the state as part of a save().
        ps->isNew = false;
    } else {
        // This state object was set as part of a restore().
        restoreState(d->dirty);
        d->dirty = ps->savedDirty;
    }
}

state() [1/2]

QVGPainterState* QVGPaintEngine::state ( )

inline

Definition at line 151 of file qpaintengine_vg_p.h.

Referenced by begin(), brushChanged(), brushOriginChanged(), clearRect(), clipEnabledChanged(), clipTransformIsSimple(), compositionModeChanged(), draw(), drawEllipse(), drawLines(), drawPath(), drawPoints(), drawPolygon(), drawRects(), drawRoundedRect(), drawTiledPixmap(), opacityChanged(), penChanged(), renderHintsChanged(), transformChanged(), and updateScissor().

{ return static_cast<QVGPainterState *>(QPaintEngineEx::state()); }

state() [2/2]

const QVGPainterState* QVGPaintEngine::state ( ) const

inline

Definition at line 152 of file qpaintengine_vg_p.h.

{ return static_cast<const QVGPainterState *>(QPaintEngineEx::state()); }

stroke()

void QVGPaintEngine::stroke ( const QVectorPath &  path, const QPen &  pen  )

virtual

Reimplemented from QPaintEngineEx.

Definition at line 1603 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);
    if (d->needsEmulation(pen.brush())) {
        QPaintEngineEx::stroke(path, pen);
        return;
    }
    VGPath vgpath = d->vectorPathToVGPath(path);
    d->stroke(vgpath, pen);
    vgDestroyPath(vgpath);
}

supportsTransformations()

bool QVGPaintEngine::supportsTransformations ( qreal  , const QTransform &    ) const

inlinevirtual

Reimplemented from QPaintEngineEx.

Definition at line 162 of file qpaintengine_vg_p.h.

{ return true; }

transformChanged()

void QVGPaintEngine::transformChanged ( )

virtual

Implements QPaintEngineEx.

Definition at line 2552 of file qpaintengine_vg.cpp.

{
    Q_D(QVGPaintEngine);
    QVGPainterState *s = state();
    d->dirty |= QPaintEngine::DirtyTransform;
    d->transform = s->transform();
    qreal oldPenScale = d->penScale;
    d->updateTransform(paintDevice());
    if (d->penScale != oldPenScale)
        d->forcePenChange = true;
}

type()

Type QVGPaintEngine::type ( ) const

inlinevirtual

Reimplement this function to return the paint engine Type.

Implements QPaintEngine.

Definition at line 85 of file qpaintengine_vg_p.h.

Referenced by clipTransformIsSimple().

{ return OpenVG; }

updateScissor()

void QVGPaintEngine::updateScissor ( )

private

Definition at line 2242 of file qpaintengine_vg.cpp.

Referenced by clip(), clipEnabledChanged(), clipTransformIsSimple(), and QVGPaintEnginePrivate::ensureMask().

{
    Q_D(QVGPaintEngine);

    QRegion region = d->systemClip;

#if defined(QVG_SCISSOR_CLIP)
    // Using the scissor to do clipping, so combine the systemClip
    // with the current painting clipRegion.

    if (d->maskValid) {
        vgSeti(VG_MASKING, VG_FALSE);
        d->maskValid = false;
    }

    QVGPainterState *s = state();
    if (s->clipEnabled) {
        if (region.isEmpty())
            region = s->clipRegion;
        else
            region = region.intersect(s->clipRegion);
        if (isDefaultClipRegion(region)) {
            // The scissor region is the entire drawing surface,
            // so there is no point doing any scissoring.
            vgSeti(VG_SCISSORING, VG_FALSE);
            d->scissorActive = false;
            d->scissorDirty = false;
            return;
        }
    } else
#endif
    {
#if !defined(QVG_SCISSOR_CLIP)
        // Combine the system clip with the simple mask rectangle.
        if (d->scissorMask) {
            if (region.isEmpty())
                region = d->maskRect;
            else
                region = region.intersect(d->maskRect);
            if (isDefaultClipRegion(region)) {
                // The scissor region is the entire drawing surface,
                // so there is no point doing any scissoring.
                vgSeti(VG_SCISSORING, VG_FALSE);
                d->scissorActive = false;
                d->scissorDirty = false;
                return;
            }
        } else
#endif

        // Disable the scissor completely if the system clip is empty.
        if (region.isEmpty()) {
            vgSeti(VG_SCISSORING, VG_FALSE);
            d->scissorActive = false;
            d->scissorDirty = false;
            return;
        }
    }

    if (d->scissorActive && region == d->scissorRegion && !d->scissorDirty)
        return;

    QVector<QRect> rects = region.rects();
    int count = rects.count();
    if (count > d->maxScissorRects) {
#if !defined(QVG_SCISSOR_CLIP)
         count = d->maxScissorRects;
#else
        // Use masking
        int width = paintDevice()->width();
        int height = paintDevice()->height();
        vgMask(VG_INVALID_HANDLE, VG_CLEAR_MASK,
                   0, 0, width, height);
        for (int i = 0; i < rects.size(); ++i) {
            vgMask(VG_INVALID_HANDLE, VG_FILL_MASK,
                   rects[i].x(), height - rects[i].y() - rects[i].height(),
                   rects[i].width(), rects[i].height());
        }

        vgSeti(VG_SCISSORING, VG_FALSE);
        vgSeti(VG_MASKING, VG_TRUE);
        d->maskValid = true;
        d->maskIsSet = false;
        d->scissorMask = false;
        d->scissorActive = false;
        d->scissorDirty = false;
        d->scissorRegion = region;
        return;
#endif
    }

    QVarLengthArray<VGint> params(count * 4);
    int height = paintDevice()->height();
    for (int i = 0; i < count; ++i) {
        params[i * 4 + 0] = rects[i].x();
        params[i * 4 + 1] = height - rects[i].y() - rects[i].height();
        params[i * 4 + 2] = rects[i].width();
        params[i * 4 + 3] = rects[i].height();
    }

    vgSetiv(VG_SCISSOR_RECTS, count * 4, params.data());
    vgSeti(VG_SCISSORING, VG_TRUE);
    d->scissorDirty = false;
    d->scissorActive = true;
    d->scissorRegion = region;
}

vgPrivate()

QVGPaintEnginePrivate* QVGPaintEngine::vgPrivate ( )

inline

Definition at line 159 of file qpaintengine_vg_p.h.

Referenced by qt_vg_drawVGImage(), qt_vg_drawVGImageStencil(), and QVGCompositionHelper::QVGCompositionHelper().

{ Q_D(QVGPaintEngine); return d; }

---

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

• /src/openvg/qpaintengine_vg_p.h
• /src/openvg/qpaintengine_vg.cpp