#include <qpaintengine_alpha_p.h>

Inheritance diagram for QAlphaPaintEnginePrivate:

Public Functions
void	addAlphaRect (const QRectF &rect)

QRectF	addPenWidth (const QPainterPath &path)

void	drawAlphaImage (const QRectF &rect)

bool	fullyContained (const QRectF &rect) const

	QAlphaPaintEnginePrivate ()

void	resetState (QPainter *p)

QRect	toRect (const QRectF &rect) const

	~QAlphaPaintEnginePrivate ()

Public Functions inherited from QPaintEnginePrivate
void	drawBoxTextItem (const QPointF &p, const QTextItemInt &ti)

	QPaintEnginePrivate ()

void	setSystemTransform (const QTransform &xform)

void	setSystemViewport (const QRegion &region)

virtual void	systemStateChanged ()

void	transformSystemClip ()

virtual	~QPaintEnginePrivate ()

Public Variables
bool	m_advancedBrush

bool	m_advancedPen

bool	m_alphaBrush

bool	m_alphaOpacity

bool	m_alphaPen

QRegion	m_alphargn

QRegion	m_cliprgn

bool	m_complexTransform

bool	m_continueCall

bool	m_emulateProjectiveTransforms

bool	m_hasalpha

int	m_pass

QPaintDevice *	m_pdev

QPen	m_pen

QPicture *	m_pic

QPaintEngine *	m_picengine

QPainter *	m_picpainter

QPaintEngine::PaintEngineFeatures	m_savedcaps

QTransform	m_transform

Public Variables inherited from QPaintEnginePrivate
QWidget *	currentClipWidget

uint	hasSystemTransform: 1

uint	hasSystemViewport: 1

QPaintDevice *	pdev

QPaintEngine *	q_ptr

QRegion	systemClip

QRect	systemRect

QTransform	systemTransform

QRegion	systemViewport

Detailed Description

Definition at line 91 of file qpaintengine_alpha_p.h.

Constructors and Destructors

◆ QAlphaPaintEnginePrivate()

QAlphaPaintEnginePrivate::QAlphaPaintEnginePrivate ( )

Definition at line 382 of file qpaintengine_alpha.cpp.

     :   m_pass(0),
         m_pic(0),
         m_picengine(0),
         m_picpainter(0),
         m_hasalpha(false),
         m_alphaPen(false),
         m_alphaBrush(false),
         m_alphaOpacity(false),
         m_advancedPen(false),
         m_advancedBrush(false),
         m_complexTransform(false)
 {
 
 }

◆ ~QAlphaPaintEnginePrivate()

QAlphaPaintEnginePrivate::~QAlphaPaintEnginePrivate ( )

Definition at line 398 of file qpaintengine_alpha.cpp.

 {
     delete m_picpainter;
     delete m_pic;
 }

Functions

◆ addAlphaRect()

void QAlphaPaintEnginePrivate::addAlphaRect ( const QRectF & rect )

Definition at line 437 of file qpaintengine_alpha.cpp.

 {
     m_alphargn |= toRect(rect);
 }

◆ addPenWidth()

QRectF QAlphaPaintEnginePrivate::addPenWidth ( const QPainterPath & path )

Definition at line 404 of file qpaintengine_alpha.cpp.

 {
     QPainterPath tmp = path;
 
     if (m_pen.style() == Qt::NoPen)
         return (path.controlPointRect() * m_transform).boundingRect();
     if (m_pen.isCosmetic())
         tmp = path * m_transform;
 
     QPainterPathStroker stroker;
     if (m_pen.widthF() == 0.0f)
         stroker.setWidth(1.0);
     else
         stroker.setWidth(m_pen.widthF());
     stroker.setJoinStyle(m_pen.joinStyle());
     stroker.setCapStyle(m_pen.capStyle());
     tmp = stroker.createStroke(tmp);
     if (m_pen.isCosmetic())
         return tmp.controlPointRect();
 
     return (tmp.controlPointRect() * m_transform).boundingRect();
 }

◆ drawAlphaImage()

void QAlphaPaintEnginePrivate::drawAlphaImage ( const QRectF & rect )

Definition at line 442 of file qpaintengine_alpha.cpp.

 {
     Q_Q(QAlphaPaintEngine);
 
     qreal dpiX = qMax(m_pdev->logicalDpiX(), 300);
     qreal dpiY = qMax(m_pdev->logicalDpiY(), 300);
     qreal xscale = (dpiX / m_pdev->logicalDpiX());
     qreal yscale = (dpiY / m_pdev->logicalDpiY());
 
     QTransform picscale;
     picscale.scale(xscale, yscale);
 
     const int tileSize = 2048;
     QSize size((int(rect.width() * xscale)), int(rect.height() * yscale));
     int divw = (size.width() / tileSize);
     int divh = (size.height() / tileSize);
     divw += 1;
     divh += 1;
 
     int incx = int(rect.width() / divw);
     int incy = int(rect.height() / divh);
 
     for (int y=0; y<divh; ++y) {
         int ypos = int((incy * y) + rect.y());
         int height = int((y == (divh - 1)) ? (rect.height() - (incy * y)) : incy) + 1;
 
         for (int x=0; x<divw; ++x) {
             int xpos = int((incx * x) + rect.x());
             int width = int((x == (divw - 1)) ? (rect.width() - (incx * x)) : incx) + 1;
 
             QSize imgsize((int)(width * xscale), (int)(height * yscale));
             QImage img(imgsize, QImage::Format_RGB32);
             img.fill(0xffffffff);
 
             QPainter imgpainter(&img);
             imgpainter.setTransform(picscale);
             QPointF picpos(qreal(-xpos), qreal(-ypos));
             imgpainter.drawPicture(picpos, *m_pic);
             imgpainter.end();
 
             q->painter()->setTransform(QTransform());
             QRect r(xpos, ypos, width, height);
             q->painter()->drawImage(r, img);
         }
     }
 }

◆ fullyContained()

bool QAlphaPaintEnginePrivate::fullyContained ( const QRectF & rect ) const

Definition at line 489 of file qpaintengine_alpha.cpp.

 {
     QRegion r(toRect(rect));
     return (m_cliprgn.intersected(r) == r);
 }

◆ resetState()

void QAlphaPaintEnginePrivate::resetState ( QPainter * p )

Definition at line 495 of file qpaintengine_alpha.cpp.

 {
     p->setPen(QPen());
     p->setBrush(QBrush());
     p->setBrushOrigin(0,0);
     p->setBackground(QBrush());
     p->setFont(QFont());
     p->setTransform(QTransform());
     // The view transform is already recorded and included in the
     // picture we're about to replay. If we don't turn if off,
     // the view matrix will be applied twice.
     p->setViewTransformEnabled(false);
     p->setClipRegion(QRegion(), Qt::NoClip);
     p->setClipPath(QPainterPath(), Qt::NoClip);
     p->setClipping(false);
     p->setOpacity(1.0f);
 }

◆ toRect()

QRect QAlphaPaintEnginePrivate::toRect ( const QRectF & rect ) const

Definition at line 427 of file qpaintengine_alpha.cpp.

Referenced by addAlphaRect(), and fullyContained().

 {
     QRect r;
     r.setLeft(int(rect.left()));
     r.setTop(int(rect.top()));
     r.setRight(int(rect.right() + 1));
     r.setBottom(int(rect.bottom() + 1));
     return r;
 }

Properties

◆ m_advancedBrush

bool QAlphaPaintEnginePrivate::m_advancedBrush

Definition at line 114 of file qpaintengine_alpha_p.h.

◆ m_advancedPen

bool QAlphaPaintEnginePrivate::m_advancedPen

Definition at line 113 of file qpaintengine_alpha_p.h.

◆ m_alphaBrush

bool QAlphaPaintEnginePrivate::m_alphaBrush

Definition at line 111 of file qpaintengine_alpha_p.h.

◆ m_alphaOpacity

bool QAlphaPaintEnginePrivate::m_alphaOpacity

Definition at line 112 of file qpaintengine_alpha_p.h.

◆ m_alphaPen

bool QAlphaPaintEnginePrivate::m_alphaPen

Definition at line 110 of file qpaintengine_alpha_p.h.

◆ m_alphargn

QRegion QAlphaPaintEnginePrivate::m_alphargn

Definition at line 106 of file qpaintengine_alpha_p.h.

Referenced by addAlphaRect().

◆ m_cliprgn

QRegion QAlphaPaintEnginePrivate::m_cliprgn

Definition at line 107 of file qpaintengine_alpha_p.h.

Referenced by fullyContained().

◆ m_complexTransform

bool QAlphaPaintEnginePrivate::m_complexTransform

Definition at line 115 of file qpaintengine_alpha_p.h.

◆ m_continueCall

bool QAlphaPaintEnginePrivate::m_continueCall

Definition at line 117 of file qpaintengine_alpha_p.h.

◆ m_emulateProjectiveTransforms

bool QAlphaPaintEnginePrivate::m_emulateProjectiveTransforms

Definition at line 116 of file qpaintengine_alpha_p.h.

◆ m_hasalpha

bool QAlphaPaintEnginePrivate::m_hasalpha

Definition at line 109 of file qpaintengine_alpha_p.h.

◆ m_pass

int QAlphaPaintEnginePrivate::m_pass

Definition at line 98 of file qpaintengine_alpha_p.h.

◆ m_pdev

QPaintDevice* QAlphaPaintEnginePrivate::m_pdev

Definition at line 104 of file qpaintengine_alpha_p.h.

Referenced by drawAlphaImage().

◆ m_pen

QPen QAlphaPaintEnginePrivate::m_pen

Definition at line 120 of file qpaintengine_alpha_p.h.

Referenced by addPenWidth().

◆ m_pic

QPicture* QAlphaPaintEnginePrivate::m_pic

Definition at line 99 of file qpaintengine_alpha_p.h.

Referenced by drawAlphaImage(), and ~QAlphaPaintEnginePrivate().

◆ m_picengine

QPaintEngine* QAlphaPaintEnginePrivate::m_picengine

Definition at line 100 of file qpaintengine_alpha_p.h.

◆ m_picpainter

QPainter* QAlphaPaintEnginePrivate::m_picpainter

Definition at line 101 of file qpaintengine_alpha_p.h.

Referenced by ~QAlphaPaintEnginePrivate().

◆ m_savedcaps

QPaintEngine::PaintEngineFeatures QAlphaPaintEnginePrivate::m_savedcaps

Definition at line 103 of file qpaintengine_alpha_p.h.

◆ m_transform

QTransform QAlphaPaintEnginePrivate::m_transform

Definition at line 119 of file qpaintengine_alpha_p.h.