qbrush.cpp File Reference

#include "qbrush.h"
#include "qpixmap.h"
#include "qbitmap.h"
#include "qpixmapcache.h"
#include "qdatastream.h"
#include "qvariant.h"
#include "qline.h"
#include "qdebug.h"
#include <QtCore/qcoreapplication.h>
#include "private/qstylehelper_p.h"
#include <QtCore/qnumeric.h>

Go to the source code of this file.

Classes
struct	QBrushDataPointerDeleter
class	QBrushPatternImageCache
class	QGlobalStaticDeleter< QBrushData >
struct	QGradientBrushData
struct	QTexturedBrushData

Macros
#define	Q_DUMMY_ACCESSOR   union {void *p; uint i;}; p = dummy;

Functions
QDebug	operator<< (QDebug dbg, const QBrush &b)
QDataStream &	operator<< (QDataStream &s, const QBrush &b)
QDataStream &	operator>> (QDataStream &s, QBrush &b)
	Q_GLOBAL_STATIC_WITH_INITIALIZER (QBrushPatternImageCache, qt_brushPatternImageCache, { qAddPostRoutine(qt_cleanup_brush_pattern_image_cache);}) static void qt_cleanup_brush_pattern_image_cache()
	Q_GLOBAL_STATIC_WITH_INITIALIZER (QBrushData, nullBrushInstance, { x->ref=1;x->style=Qt::BrushStyle(0);x->color=Qt::black;}) static bool qbrush_check_type(Qt
bool Q_GUI_EXPORT	qHasPixmapTexture (const QBrush &brush)
static void	qt_cleanup_brush_pattern_image_cache ()
Q_GUI_EXPORT QImage	qt_imageForBrush (int brushStyle, bool invert)
Q_GUI_EXPORT bool	qt_isExtendedRadialGradient (const QBrush &brush)
const uchar *	qt_patternForBrush (int brushStyle, bool invert)
QPixmap	qt_pixmapForBrush (int brushStyle, bool invert)
static QPointF	qt_radial_gradient_adapt_focal_point (const QPointF &center, qreal radius, const QPointF &focalPoint)

Macro Definition Documentation

Q_DUMMY_ACCESSOR

#define Q_DUMMY_ACCESSOR   union {void *p; uint i;}; p = dummy;

Definition at line 1530 of file qbrush.cpp.

Referenced by QGradient::coordinateMode(), QRadialGradient::focalRadius(), QGradient::interpolationMode(), QGradient::setCoordinateMode(), QRadialGradient::setFocalRadius(), and QGradient::setInterpolationMode().

Function Documentation

operator<<() [1/2]

QDebug operator<<	(	QDebug	dbg,
		const QBrush &	b
	)

Warning

This function is not part of the public interface.

Definition at line 1058 of file qbrush.cpp.

{
#ifndef Q_BROKEN_DEBUG_STREAM
    static const char *BRUSH_STYLES[] = {
     "NoBrush",
     "SolidPattern",
     "Dense1Pattern",
     "Dense2Pattern",
     "Dense3Pattern",
     "Dense4Pattern",
     "Dense5Pattern",
     "Dense6Pattern",
     "Dense7Pattern",
     "HorPattern",
     "VerPattern",
     "CrossPattern",
     "BDiagPattern",
     "FDiagPattern",
     "DiagCrossPattern",
     "LinearGradientPattern",
     "RadialGradientPattern",
     "ConicalGradientPattern",
     0, 0, 0, 0, 0, 0,
     "TexturePattern" // 24
    };

    dbg.nospace() << "QBrush(" << b.color() << ',' << BRUSH_STYLES[b.style()] << ')';
    return dbg.space();
#else
    qWarning("This compiler doesn't support streaming QBrush to QDebug");
    return dbg;
    Q_UNUSED(b);
#endif
}

operator<<() [2/2]

QDataStream& operator<< ( QDataStream &  s, const QBrush &  b  )

related

Definition at line 1111 of file qbrush.cpp.

Referenced by QBrush::setColor().

{
    quint8 style = (quint8) b.style();
    bool gradient_style = false;

    if (style == Qt::LinearGradientPattern || style == Qt::RadialGradientPattern
        || style == Qt::ConicalGradientPattern)
        gradient_style = true;

    if (s.version() < QDataStream::Qt_4_0 && gradient_style)
        style = Qt::NoBrush;

    s << style << b.color();
    if (b.style() == Qt::TexturePattern) {
        s << b.texture();
    } else if (s.version() >= QDataStream::Qt_4_0 && gradient_style) {
        const QGradient *gradient = b.gradient();
        int type_as_int = int(gradient->type());
        s << type_as_int;
        if (s.version() >= QDataStream::Qt_4_3) {
            s << int(gradient->spread());
            s << int(gradient->coordinateMode());
        }

        if (s.version() >= QDataStream::Qt_4_5)
            s << int(gradient->interpolationMode());

        if (sizeof(qreal) == sizeof(double)) {
            s << gradient->stops();
        } else {
            // ensure that we write doubles here instead of streaming the stops
            // directly; otherwise, platforms that redefine qreal might generate
            // data that cannot be read on other platforms.
            QVector<QGradientStop> stops = gradient->stops();
            s << quint32(stops.size());
            for (int i = 0; i < stops.size(); ++i) {
                const QGradientStop &stop = stops.at(i);
                s << QPair<double, QColor>(double(stop.first), stop.second);
            }
        }

        if (gradient->type() == QGradient::LinearGradient) {
            s << static_cast<const QLinearGradient *>(gradient)->start();
            s << static_cast<const QLinearGradient *>(gradient)->finalStop();
        } else if (gradient->type() == QGradient::RadialGradient) {
            s << static_cast<const QRadialGradient *>(gradient)->center();
            s << static_cast<const QRadialGradient *>(gradient)->focalPoint();
            s << (double) static_cast<const QRadialGradient *>(gradient)->radius();
        } else { // type == Conical
            s << static_cast<const QConicalGradient *>(gradient)->center();
            s << (double) static_cast<const QConicalGradient *>(gradient)->angle();
        }
    }
    if (s.version() >= QDataStream::Qt_4_3)
        s << b.transform();
    return s;
}

operator>>()

QDataStream& operator>> ( QDataStream &  s, QBrush &  b  )

related

Definition at line 1182 of file qbrush.cpp.

Referenced by QBrush::setColor().

{
    quint8 style;
    QColor color;
    s >> style;
    s >> color;
    if (style == Qt::TexturePattern) {
        QPixmap pm;
        s >> pm;
        b = QBrush(color, pm);
    } else if (style == Qt::LinearGradientPattern
               || style == Qt::RadialGradientPattern
               || style == Qt::ConicalGradientPattern) {

        int type_as_int;
        QGradient::Type type;
        QGradientStops stops;
        QGradient::CoordinateMode cmode = QGradient::LogicalMode;
        QGradient::Spread spread = QGradient::PadSpread;
        QGradient::InterpolationMode imode = QGradient::ColorInterpolation;

        s >> type_as_int;
        type = QGradient::Type(type_as_int);
        if (s.version() >= QDataStream::Qt_4_3) {
            s >> type_as_int;
            spread = QGradient::Spread(type_as_int);
            s >> type_as_int;
            cmode = QGradient::CoordinateMode(type_as_int);
        }

        if (s.version() >= QDataStream::Qt_4_5) {
            s >> type_as_int;
            imode = QGradient::InterpolationMode(type_as_int);
        }

        if (sizeof(qreal) == sizeof(double)) {
            s >> stops;
        } else {
            quint32 numStops;
            double n;
            QColor c;

            s >> numStops;
            for (quint32 i = 0; i < numStops; ++i) {
                s >> n >> c;
                stops << QPair<qreal, QColor>(n, c);
            }
        }

        if (type == QGradient::LinearGradient) {
            QPointF p1, p2;
            s >> p1;
            s >> p2;
            QLinearGradient lg(p1, p2);
            lg.setStops(stops);
            lg.setSpread(spread);
            lg.setCoordinateMode(cmode);
            lg.setInterpolationMode(imode);
            b = QBrush(lg);
        } else if (type == QGradient::RadialGradient) {
            QPointF center, focal;
            double radius;
            s >> center;
            s >> focal;
            s >> radius;
            QRadialGradient rg(center, radius, focal);
            rg.setStops(stops);
            rg.setSpread(spread);
            rg.setCoordinateMode(cmode);
            rg.setInterpolationMode(imode);
            b = QBrush(rg);
        } else { // type == QGradient::ConicalGradient
            QPointF center;
            double angle;
            s >> center;
            s >> angle;
            QConicalGradient cg(center, angle);
            cg.setStops(stops);
            cg.setSpread(spread);
            cg.setCoordinateMode(cmode);
            cg.setInterpolationMode(imode);
            b = QBrush(cg);
        }
    } else {
        b = QBrush(color, (Qt::BrushStyle)style);
    }
    if (s.version() >= QDataStream::Qt_4_3) {
        QTransform transform;
        s >> transform;
        b.setTransform(transform);
    }
    return s;
}

Q_GLOBAL_STATIC_WITH_INITIALIZER() [1/2]

Q_GLOBAL_STATIC_WITH_INITIALIZER	(	QBrushPatternImageCache	,
		qt_brushPatternImageCache	,
		{ qAddPostRoutine(qt_cleanup_brush_pattern_image_cache);}
	)

Definition at line 157 of file qbrush.cpp.

                                 {
                                     qAddPostRoutine(qt_cleanup_brush_pattern_image_cache);
                                 })

static void qt_cleanup_brush_pattern_image_cache()
{
    qt_brushPatternImageCache()->cleanup();
}

Q_GLOBAL_STATIC_WITH_INITIALIZER() [2/2]

Q_GLOBAL_STATIC_WITH_INITIALIZER	(	QBrushData	,
		nullBrushInstance	,
		{ x->ref=1;x->style=Qt::BrushStyle(0);x->color=Qt::black;}
	)

Definition at line 365 of file qbrush.cpp.

                                 {
                                     x->ref = 1;
                                     x->style = Qt::BrushStyle(0);
                                     x->color = Qt::black;
                                 })

static bool qbrush_check_type(Qt::BrushStyle style) {
    switch (style) {
    case Qt::TexturePattern:
         qWarning("QBrush: Incorrect use of TexturePattern");
         break;
    case Qt::LinearGradientPattern:
    case Qt::RadialGradientPattern:
    case Qt::ConicalGradientPattern:
        qWarning("QBrush: Wrong use of a gradient pattern");
        break;
    default:
        return true;
    }
    return false;
}

qHasPixmapTexture()

bool Q_GUI_EXPORT qHasPixmapTexture

(

const QBrush &

brush

)

Definition at line 223 of file qbrush.cpp.

Referenced by check_gradient(), QTextHtmlExporter::emitBackgroundAttribute(), QTextHtmlExporter::emitBlock(), is_brush_transparent(), QGL2PaintEngineExPrivate::setBrush(), QSpanData::setup(), QGL2PaintEngineExPrivate::updateBrushUniforms(), and QPainterPrivate::updateEmulationSpecifier().

{
    if (brush.style() != Qt::TexturePattern)
        return false;
    QTexturedBrushData *tx_data = static_cast<QTexturedBrushData *>(brush.d.data());
    return tx_data->m_has_pixmap_texture;
}

qt_cleanup_brush_pattern_image_cache()

static void qt_cleanup_brush_pattern_image_cache ( )

static

Referenced by Q_GLOBAL_STATIC_WITH_INITIALIZER().

qt_imageForBrush()

Q_GUI_EXPORT QImage qt_imageForBrush	(	int	brushStyle,
		bool	invert
	)

Definition at line 167 of file qbrush.cpp.

Referenced by QOpenGLPaintEnginePrivate::composite(), QVGPaintEnginePrivate::roundedRectPath(), QVGPaintEnginePrivate::setBrush(), QSpanData::setup(), and QGL2PaintEngineExPrivate::updateBrushTexture().

{
    return qt_brushPatternImageCache()->getImage(brushStyle, invert);
}

qt_isExtendedRadialGradient()

Q_GUI_EXPORT bool qt_isExtendedRadialGradient

(

const QBrush &

brush

)

Definition at line 881 of file qbrush.cpp.

Referenced by QOpenGLPaintEngine::fill(), QOpenGLPaintEnginePrivate::fillPath(), QBrush::isOpaque(), QVGPaintEnginePrivate::needsEmulation(), QPainterPrivate::updateEmulationSpecifier(), QPainterPrivate::updateInvMatrix(), and QOpenGLPaintEnginePrivate::updateUseEmulation().

{
    if (brush.style() == Qt::RadialGradientPattern) {
        const QGradient *g = brush.gradient();
        const QRadialGradient *rg = static_cast<const QRadialGradient *>(g);

        if (!qFuzzyIsNull(rg->focalRadius()))
            return true;

        QPointF delta = rg->focalPoint() - rg->center();
        if (delta.x() * delta.x() + delta.y() * delta.y() > rg->radius() * rg->radius())
            return true;
    }

    return false;
}

qt_patternForBrush()

const uchar* qt_patternForBrush	(	int	brushStyle,
		bool	invert
	)

Definition at line 56 of file qbrush.cpp.

Referenced by QBrushPatternImageCache::init(), and qt_pixmapForBrush().

{
    Q_ASSERT(brushStyle > Qt::SolidPattern && brushStyle < Qt::LinearGradientPattern);
    if(invert) {
        static const uchar dense1_pat[] = { 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff };
        static const uchar dense2_pat[] = { 0x77, 0xff, 0xdd, 0xff, 0x77, 0xff, 0xdd, 0xff };
        static const uchar dense3_pat[] = { 0x55, 0xbb, 0x55, 0xee, 0x55, 0xbb, 0x55, 0xee };
        static const uchar dense4_pat[] = { 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55 };
        static const uchar dense5_pat[] = { 0xaa, 0x44, 0xaa, 0x11, 0xaa, 0x44, 0xaa, 0x11 };
        static const uchar dense6_pat[] = { 0x88, 0x00, 0x22, 0x00, 0x88, 0x00, 0x22, 0x00 };
        static const uchar dense7_pat[] = { 0x00, 0x44, 0x00, 0x00, 0x00, 0x44, 0x00, 0x00 };
        static const uchar hor_pat[]    = { 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00 };
        static const uchar ver_pat[]    = { 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10 };
        static const uchar cross_pat[]  = { 0x10, 0x10, 0x10, 0xff, 0x10, 0x10, 0x10, 0x10 };
        static const uchar bdiag_pat[]  = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
        static const uchar fdiag_pat[]  = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 };
        static const uchar dcross_pat[] = { 0x81, 0x42, 0x24, 0x18, 0x18, 0x24, 0x42, 0x81 };
        static const uchar *const pat_tbl[] = {
            dense1_pat, dense2_pat, dense3_pat, dense4_pat, dense5_pat,
            dense6_pat, dense7_pat,
            hor_pat, ver_pat, cross_pat, bdiag_pat, fdiag_pat, dcross_pat };
        return pat_tbl[brushStyle - Qt::Dense1Pattern];
    }
    static const uchar dense1_pat[] = { 0x00, 0x44, 0x00, 0x00, 0x00, 0x44, 0x00, 0x00 };
    static const uchar dense2_pat[] = { 0x88, 0x00, 0x22, 0x00, 0x88, 0x00, 0x22, 0x00 };
    static const uchar dense3_pat[] = { 0xaa, 0x44, 0xaa, 0x11, 0xaa, 0x44, 0xaa, 0x11 };
    static const uchar dense4_pat[] = { 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa };
    static const uchar dense5_pat[] = { 0x55, 0xbb, 0x55, 0xee, 0x55, 0xbb, 0x55, 0xee };
    static const uchar dense6_pat[] = { 0x77, 0xff, 0xdd, 0xff, 0x77, 0xff, 0xdd, 0xff };
    static const uchar dense7_pat[] = { 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff };
    static const uchar hor_pat[]    = { 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff };
    static const uchar ver_pat[]    = { 0xef, 0xef, 0xef, 0xef, 0xef, 0xef, 0xef, 0xef };
    static const uchar cross_pat[]  = { 0xef, 0xef, 0xef, 0x00, 0xef, 0xef, 0xef, 0xef };
    static const uchar bdiag_pat[]  = { 0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0xfe };
    static const uchar fdiag_pat[]  = { 0xfe, 0xfd, 0xfb, 0xf7, 0xef, 0xdf, 0xbf, 0x7f };
    static const uchar dcross_pat[] = { 0x7e, 0xbd, 0xdb, 0xe7, 0xe7, 0xdb, 0xbd, 0x7e };
    static const uchar *const pat_tbl[] = {
        dense1_pat, dense2_pat, dense3_pat, dense4_pat, dense5_pat,
        dense6_pat, dense7_pat,
        hor_pat, ver_pat, cross_pat, bdiag_pat, fdiag_pat, dcross_pat };
    return pat_tbl[brushStyle - Qt::Dense1Pattern];
}

qt_pixmapForBrush()

QPixmap qt_pixmapForBrush	(	int	brushStyle,
		bool	invert
	)

Definition at line 99 of file qbrush.cpp.

Referenced by getPatternFill(), and QX11PaintEngine::updateBrush().

{

    QPixmap pm;
    QString key = QLatin1Literal("$qt-brush$")
                  % HexString<uint>(brushStyle)
                  % QLatin1Char(invert ? '1' : '0');
    if (!QPixmapCache::find(key, pm)) {
        pm = QBitmap::fromData(QSize(8, 8), qt_patternForBrush(brushStyle, invert),
                               QImage::Format_MonoLSB);
        QPixmapCache::insert(key, pm);
    }

    return pm;
}

qt_radial_gradient_adapt_focal_point()

static QPointF qt_radial_gradient_adapt_focal_point ( const QPointF &  center, qreal  radius, const QPointF &  focalPoint  )

static

Definition at line 1933 of file qbrush.cpp.

Referenced by QRadialGradient::QRadialGradient().

{
    // We have a one pixel buffer zone to avoid numerical instability on the
    // circle border
    //### this is hacky because technically we should adjust based on current matrix
    const qreal compensated_radius = radius - radius * qreal(0.001);
    QLineF line(center, focalPoint);
    if (line.length() > (compensated_radius))
        line.setLength(compensated_radius);
    return line.p2();
}