43 QPainter *painter = context.
painter();
51 colorisedIm.invertPixels( QImage::InvertRgba );
65 colorisedIm = QImage( *imb );
72 const QPointF transPt( -offsetDist * std::cos( angleRad + M_PI_2 ),
73 -offsetDist * std::sin( angleRad + M_PI_2 ) );
81 QImage innerShadowIm( colorisedIm.width(), colorisedIm.height(), QImage::Format_ARGB32 );
82 innerShadowIm.fill( Qt::transparent );
83 QPainter imPainter( &innerShadowIm );
86 imPainter.drawImage( transPt.x(), transPt.y(), colorisedIm );
89 imPainter.setCompositionMode( QPainter::CompositionMode_DestinationIn );
93 painter->drawImage(
imageOffset( context ), innerShadowIm );
97 painter->drawImage(
imageOffset( context ) + transPt, colorisedIm );
104 props.insert( QStringLiteral(
"enabled" ),
mEnabled ?
"1" :
"0" );
105 props.insert( QStringLiteral(
"draw_mode" ), QString::number(
int(
mDrawMode ) ) );
106 props.insert( QStringLiteral(
"blend_mode" ), QString::number(
int(
mBlendMode ) ) );
107 props.insert( QStringLiteral(
"opacity" ), QString::number(
mOpacity ) );
108 props.insert( QStringLiteral(
"blur_level" ), QString::number(
mBlurLevel ) );
111 props.insert( QStringLiteral(
"offset_angle" ), QString::number(
mOffsetAngle ) );
112 props.insert( QStringLiteral(
"offset_distance" ), QString::number(
mOffsetDist ) );
122 const QPainter::CompositionMode mode =
static_cast< QPainter::CompositionMode
>( props.value( QStringLiteral(
"blend_mode" ) ).toInt( &ok ) );
127 if ( props.contains( QStringLiteral(
"transparency" ) ) )
129 const double transparency = props.value( QStringLiteral(
"transparency" ) ).toDouble( &ok );
137 const double opacity = props.value( QStringLiteral(
"opacity" ) ).toDouble( &ok );
143 mEnabled = props.value( QStringLiteral(
"enabled" ), QStringLiteral(
"1" ) ).toInt();
145 const double level = props.value( QStringLiteral(
"blur_level" ) ).toDouble( &ok );
149 if ( !props.contains( QStringLiteral(
"blur_unit" ) ) )
157 const int angle = props.value( QStringLiteral(
"offset_angle" ) ).toInt( &ok );
162 const double distance = props.value( QStringLiteral(
"offset_distance" ) ).toDouble( &ok );
169 if ( props.contains( QStringLiteral(
"color" ) ) )
185 return rect.adjusted( -spread, -spread, spread, spread );
208 return QStringLiteral(
"dropShadow" );
241 return QStringLiteral(
"innerShadow" );
@ ShadowOffset
Shadow offset.
static QColor colorFromString(const QString &string)
Decodes a string into a color value.
static QString colorToString(const QColor &color)
Encodes a color into a string value.
A paint effect which draws an offset and optionally blurred drop shadow.
static QgsPaintEffect * create(const QVariantMap &map)
Creates a new QgsDropShadowEffect effect from a properties string map.
QString type() const override
Returns the effect type.
QgsDropShadowEffect * clone() const override
Duplicates an effect by creating a deep copy of the effect.
bool exteriorShadow() const override
Specifies whether the shadow is drawn outside the picture or within the picture.
bool isCanceled() const
Tells whether the operation has been canceled already.
static void multiplyOpacity(QImage &image, double factor, QgsFeedback *feedback=nullptr)
Multiplies opacity of image pixel values by a factor.
static void overlayColor(QImage &image, const QColor &color)
Overlays a color onto an image.
static QImage * gaussianBlur(QImage &image, int radius, QgsFeedback *feedback=nullptr)
Performs a gaussian blur on an image.
static void stackBlur(QImage &image, int radius, bool alphaOnly=false, QgsFeedback *feedback=nullptr)
Performs a stack blur on an image.
A paint effect which draws an offset and optionally blurred drop shadow within a picture.
bool exteriorShadow() const override
Specifies whether the shadow is drawn outside the picture or within the picture.
QString type() const override
Returns the effect type.
static QgsPaintEffect * create(const QVariantMap &map)
Creates a new QgsInnerShadowEffect effect from a properties string map.
QgsInnerShadowEffect * clone() const override
Duplicates an effect by creating a deep copy of the effect.
Base class for visual effects which can be applied to QPicture drawings.
QPointF imageOffset(const QgsRenderContext &context) const
Returns the offset which should be used when drawing the source image on to a destination render cont...
const QPicture * source() const
Returns the source QPicture.
bool enabled() const
Returns whether the effect is enabled.
DrawMode
Drawing modes for effects.
QImage * sourceAsImage(QgsRenderContext &context)
Returns the source QPicture rendered to a new QImage.
Contains information about the context of a rendering operation.
double convertToPainterUnits(double size, Qgis::RenderUnit unit, const QgsMapUnitScale &scale=QgsMapUnitScale(), Qgis::RenderSubcomponentProperty property=Qgis::RenderSubcomponentProperty::Generic) const
Converts a size from the specified units to painter units (pixels).
QPainter * painter()
Returns the destination QPainter for the render operation.
QgsFeedback * feedback() const
Returns the feedback object that can be queried regularly during rendering to check if rendering shou...
Scoped object for saving and restoring a QPainter object's state.
Base class for paint effects which offset, blurred shadows.
QVariantMap properties() const override
Returns the properties describing the paint effect encoded in a string format.
double opacity() const
Returns the opacity for the effect.
Qgis::RenderUnit mOffsetUnit
virtual bool exteriorShadow() const =0
Specifies whether the shadow is drawn outside the picture or within the picture.
void draw(QgsRenderContext &context) override
Handles drawing of the effect's result on to the specified render context.
QgsMapUnitScale mOffsetMapUnitScale
Qgis::RenderUnit mBlurUnit
QRectF boundingRect(const QRectF &rect, const QgsRenderContext &context) const override
Returns the bounding rect required for drawing the effect.
double blurLevel() const
Returns the blur level (radius) for the shadow.
QPainter::CompositionMode mBlendMode
void readProperties(const QVariantMap &props) override
Reads a string map of an effect's properties and restores the effect to the state described by the pr...
QgsMapUnitScale mBlurMapUnitScale
static QString encodeMapUnitScale(const QgsMapUnitScale &mapUnitScale)
static QgsMapUnitScale decodeMapUnitScale(const QString &str)
static Q_INVOKABLE Qgis::RenderUnit decodeRenderUnit(const QString &string, bool *ok=nullptr)
Decodes a render unit from a string.
static Q_INVOKABLE QString encodeUnit(Qgis::DistanceUnit unit)
Encodes a distance unit to a string.