Interface for all raster shaders. More...

#include <qgsrastershader.h>

Collaboration diagram for QgsRasterShader:

Public Member Functions
	QgsRasterShader (double theMinimumValue=0.0, double theMaximumValue=255.0)
	~QgsRasterShader ()
double	maximumValue ()
	Return the maximum value for the raster shader.
double	minimumValue ()
	Return the minimum value for the raster shader.
QgsRasterShaderFunction *	rasterShaderFunction ()
const QgsRasterShaderFunction *	rasterShaderFunction () const
void	readXML (const QDomElement &elem)
void	setMaximumValue (double)
	Set the maximum value.
void	setMinimumValue (double)
	Return the minimum value.
void	setRasterShaderFunction (QgsRasterShaderFunction *)
	A public method that allows the user to set their own shader function.
bool	shade (double, int , int , int , int )
	generates and new RGBA value based on one input value
bool	shade (double, double, double, double, int , int , int , int )
	generates and new RGBA value based on original RGBA value
void	writeXML (QDomDocument &doc, QDomElement &parent) const
Private Attributes
double	mMaximumValue
	user defineable maximum value for the raster shader
double	mMinimumValue
	User defineable minimum value for the raster shader.
QgsRasterShaderFunction *	mRasterShaderFunction
	Pointer to the shader function.

Detailed Description

Interface for all raster shaders.

Definition at line 31 of file qgsrastershader.h.

Constructor & Destructor Documentation

QgsRasterShader::QgsRasterShader	(	double	theMinimumValue = `0.0`,
		double	theMaximumValue = `255.0`
	)

Definition at line 25 of file qgsrastershader.cpp.

References mMaximumValue, mMinimumValue, mRasterShaderFunction, and QgsDebugMsg.

QgsRasterShader::~QgsRasterShader ( )

Definition at line 34 of file qgsrastershader.cpp.

References mRasterShaderFunction.

Member Function Documentation

double QgsRasterShader::maximumValue ( ) [inline]

Return the maximum value for the raster shader.

Definition at line 44 of file qgsrastershader.h.

Referenced by QgsSingleBandPseudoColorRenderer::clone().

double QgsRasterShader::minimumValue ( ) [inline]

Return the minimum value for the raster shader.

Definition at line 47 of file qgsrastershader.h.

Referenced by QgsSingleBandPseudoColorRenderer::clone().

QgsRasterShaderFunction* QgsRasterShader::rasterShaderFunction ( ) [inline]

Definition at line 49 of file qgsrastershader.h.

Referenced by QgsSingleBandPseudoColorRenderer::clone(), QgsSingleBandPseudoColorRenderer::legendSymbologyItems(), and QgsSingleBandPseudoColorRendererWidget::setFromRenderer().

const QgsRasterShaderFunction* QgsRasterShader::rasterShaderFunction ( ) const [inline]

Definition at line 50 of file qgsrastershader.h.

void QgsRasterShader::readXML ( const QDomElement & elem )

Definition at line 164 of file qgsrastershader.cpp.

References QgsColorRampShader::setClip(), QgsColorRampShader::setColorRampItemList(), QgsColorRampShader::setColorRampType(), and setRasterShaderFunction().

Referenced by QgsSingleBandPseudoColorRenderer::create().

void QgsRasterShader::setMaximumValue ( double theValue )

Set the maximum value.

Set the maximum value for the raster shader.

Parameters:

theValue The new maximum value

Definition at line 106 of file qgsrastershader.cpp.

References mMaximumValue, mRasterShaderFunction, QgsDebugMsg, and QgsRasterShaderFunction::setMaximumValue().

void QgsRasterShader::setMinimumValue ( double theValue )

Return the minimum value.

Set the maximum value for the raster shader.

Parameters:

theValue The new minimum value

Definition at line 122 of file qgsrastershader.cpp.

References mMinimumValue, mRasterShaderFunction, QgsDebugMsg, and QgsRasterShaderFunction::setMinimumValue().

void QgsRasterShader::setRasterShaderFunction ( QgsRasterShaderFunction * theFunction )

A public method that allows the user to set their own shader function.

A public function that allows the user to set their own custom shader function.

Note:: Raster shader takes ownership of the shader function instance

Parameters:

theFunction A pointer to the new raster shader function

Definition at line 87 of file qgsrastershader.cpp.

References mRasterShaderFunction, and QgsDebugMsg.

Referenced by QgsSingleBandPseudoColorRenderer::clone(), readXML(), QgsSingleBandPseudoColorRendererWidget::renderer(), and QgsRasterLayer::setDataProvider().

bool QgsRasterShader::shade	(	double	theValue,
		int *	theReturnRedValue,
		int *	theReturnGreenValue,
		int *	theReturnBlueValue,
		int *	theReturnAlpha
	)

generates and new RGBA value based on one input value

Generates and new RGBA value based on one input value.

Parameters:

theValue	The original value to base a new RGBA value on
theReturnRedValue	The red component of the new RGBA value
theReturnGreenValue	The green component of the new RGBA value
theReturnBlueValue	The blue component of the new RGBA value
theReturnAlpha	The alpha component of the new RGBA value

Returns:: True if the return values are valid otherwise false

Definition at line 49 of file qgsrastershader.cpp.

References mRasterShaderFunction, and QgsRasterShaderFunction::shade().

Referenced by QgsSingleBandPseudoColorRenderer::block().

bool QgsRasterShader::shade	(	double	theRedValue,
		double	theGreenValue,
		double	theBlueValue,
		double	theAlphaValue,
		int *	theReturnRedValue,
		int *	theReturnGreenValue,
		int *	theReturnBlueValue,
		int *	theReturnAlphaValue
	)

generates and new RGBA value based on original RGBA value

Generates and new RGBA value based on an original RGBA value.

Parameters:

theRedValue	The red component of the original value to base a new RGBA value on
theGreenValue	The green component of the original value to base a new RGBA value on
theBlueValue	The blue component of the original value to base a new RGBA value on
theAlphaValue	The alpha component of the original value to base a new RGBA value on
theReturnRedValue	The red component of the new RGBA value
theReturnGreenValue	The green component of the new RGBA value
theReturnBlueValue	The blue component of the new RGBA value
theReturnAlphaValue	The alpha component of the new RGBA value