23 #include <QCoreApplication> 24 #include <QDomDocument> 25 #include <QDomElement> 66 if ( !input )
return false;
75 for (
int i = 1; i <= input->
bandCount(); i++ )
106 if ( rasterRendererElem.isNull() )
111 rasterRendererElem.setAttribute( QStringLiteral(
"type" ),
mType );
112 rasterRendererElem.setAttribute( QStringLiteral(
"opacity" ), QString::number(
mOpacity ) );
113 rasterRendererElem.setAttribute( QStringLiteral(
"alphaBand" ),
mAlphaBand );
121 QDomElement minMaxOriginElem = doc.createElement( QStringLiteral(
"minMaxOrigin" ) );
123 rasterRendererElem.appendChild( minMaxOriginElem );
128 if ( !mNodataColor.isValid() )
131 return mNodataColor.rgba();
136 if ( rendererElem.isNull() )
141 mType = rendererElem.attribute( QStringLiteral(
"type" ) );
142 mOpacity = rendererElem.attribute( QStringLiteral(
"opacity" ), QStringLiteral(
"1.0" ) ).toDouble();
143 mAlphaBand = rendererElem.attribute( QStringLiteral(
"alphaBand" ), QStringLiteral(
"-1" ) ).toInt();
144 const QString colorEncoded = rendererElem.attribute( QStringLiteral(
"nodataColor" ) );
147 QDomElement rasterTransparencyElem = rendererElem.firstChildElement( QStringLiteral(
"rasterTransparency" ) );
148 if ( !rasterTransparencyElem.isNull() )
155 QDomElement minMaxOriginElem = rendererElem.firstChildElement( QStringLiteral(
"minMaxOrigin" ) );
156 if ( !minMaxOriginElem.isNull() )
171 if ( copyMinMaxOrigin )
177 QDomElement rasterSymbolizerElem = doc.createElement( QStringLiteral(
"sld:RasterSymbolizer" ) );
178 element.appendChild( rasterSymbolizerElem );
183 QDomElement opacityElem = doc.createElement( QStringLiteral(
"sld:Opacity" ) );
184 opacityElem.appendChild( doc.createTextNode( QString::number(
opacity() ) ) );
185 rasterSymbolizerElem.appendChild( opacityElem );
virtual int bandCount() const =0
Gets number of bands.
bool isEmpty() const
True if there are no entries in the pixel lists except the nodata value.
virtual void toSld(QDomDocument &doc, QDomElement &element, const QgsStringMap &props=QgsStringMap()) const
Used from subclasses to create SLD Rule elements following SLD v1.0 specs.
virtual bool accept(QgsStyleEntityVisitorInterface *visitor) const
Accepts the specified symbology visitor, causing it to visit all symbols associated with the renderer...
QColor nodataColor() const
Returns the color to use for shading nodata pixels.
double opacity() const
Returns the opacity for the renderer, where opacity is a value between 0 (totally transparent) and 1...
bool qgsDoubleNear(double a, double b, double epsilon=4 *std::numeric_limits< double >::epsilon())
Compare two doubles (but allow some difference)
static bool typeIsNumeric(Qgis::DataType type)
Returns true if data type is numeric.
virtual QgsRasterInterface * input() const
Current input.
QgsRasterRenderer(QgsRasterInterface *input=nullptr, const QString &type=QString())
Constructor for QgsRasterRenderer.
DataType
Raster data types.
QgsRasterMinMaxOrigin mMinMaxOrigin
Origin of min/max values.
const QgsRasterMinMaxOrigin & minMaxOrigin() const
Returns const reference to origin of min/max values.
virtual Qgis::DataType dataType(int bandNo) const =0
Returns data type for the band specified by number.
An interface for classes which can visit style entity (e.g.
QMap< QString, QString > QgsStringMap
const QgsRasterTransparency * rasterTransparency() const
static QString encodeColor(const QColor &color)
QgsRasterTransparency * mRasterTransparency
Raster transparency per color or value. Overwrites global alpha value.
Color, alpha, red, green, blue, 4 bytes the same as QImage::Format_ARGB32_Premultiplied.
static const QRgb NODATA_COLOR
bool setInput(QgsRasterInterface *input) override
Set input.
#define QgsDebugMsgLevel(str, level)
void _writeXml(QDomDocument &doc, QDomElement &rasterRendererElem) const
Write upper class info into rasterrenderer element (called by writeXml method of subclasses) ...
void copyCommonProperties(const QgsRasterRenderer *other, bool copyMinMaxOrigin=true)
Copies common properties like opacity / transparency data from other renderer.
void readXml(const QDomElement &elem)
Deserialize object.
bool usesTransparency() const
Unknown or unspecified type.
void readXml(const QDomElement &elem)
Reads the transparency information from an XML document.
int mAlphaBand
Read alpha value from band.
void setAlphaBand(int band)
void readXml(const QDomElement &rendererElem) override
Sets base class members from xml. Usually called from create() methods of subclasses.
int bandCount() const override
Gets number of bands.
Qgis::DataType dataType(int bandNo) const override
Returns data type for the band specified by number.
Base class for processing filters like renderers, reprojector, resampler etc.
void setMinMaxOrigin(const QgsRasterMinMaxOrigin &origin)
Sets origin of min/max values.
void setNodataColor(const QColor &color)
Sets the color to use for shading nodata pixels.
~QgsRasterRenderer() override
void writeXml(QDomDocument &doc, QDomElement &parentElem) const
Writes the transparency information to an XML document.
QRgb renderColorForNodataPixel() const
Returns the color for the renderer to use to represent nodata pixels.
double mOpacity
Global alpha value (0-1)
Defines the list of pixel values to be considered as transparent or semi transparent when rendering r...
void setOpacity(double opacity)
Sets the opacity for the renderer, where opacity is a value between 0 (totally transparent) and 1...
QgsRasterInterface * mInput
void setRasterTransparency(QgsRasterTransparency *t)
Raster renderer pipe that applies colors to a raster.
void writeXml(QDomDocument &doc, QDomElement &parentElem) const
Serialize object.
static QColor decodeColor(const QString &str)