QgsRasterShader class

Interface for all raster shaders.

Constructors, destructors, conversion operators

QgsRasterShader(const QgsRasterShader& rh) deleted: QgsRasterShader cannot be copied.

auto maximumValue() const -> double: Returns the maximum value for the raster shader.
auto minimumValue() const -> double: Returns the minimum value for the raster shader.
auto operator=(const QgsRasterShader& rh) -> QgsRasterShader& deleted: QgsRasterShader cannot be copied.
void readXml(const QDomElement& elem): Reads shader state from an XML element.
void setMaximumValue(double value): Sets the maximum value for the raster shader.
void setMinimumValue(double value): Sets the minimum value for the raster shader.
void setRasterShaderFunction(QgsRasterShaderFunction* function): A public method that allows the user to set their own shader function.
auto shade(double value, int* returnRedValue, int* returnGreenValue, int* returnBlueValue, int* returnAlpha) -> bool: Generates a new RGBA value based on one input value.
auto shade(double redValue, double greenValue, double blueValue, double alphaValue, int* returnRedValue, int* returnGreenValue, int* returnBlueValue, int* returnAlpha) -> bool: Generates a new RGBA value based on an original RGBA value.
void writeXml(QDomDocument& doc, QDomElement& parent) const: Writes shader state to an XML element.

Returns the maximum value for the raster shader.

Returns the minimum value for the raster shader.

Sets the maximum value for the raster shader.

Sets the minimum value for the raster shader.

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

Generates a new RGBA value based on one input value.

Parameters
value	The original value to base a new RGBA value on
returnRedValue	The red component of the new RGBA value
returnGreenValue	The green component of the new RGBA value
returnBlueValue	The blue component of the new RGBA value
returnAlpha	The alpha component of the new RGBA value
Returns	True if the return values are valid otherwise false

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

Parameters
redValue	The red component of the original value to base a new RGBA value on
greenValue	The green component of the original value to base a new RGBA value on
blueValue	The blue component of the original value to base a new RGBA value on
alphaValue	The alpha component of the original value to base a new RGBA value on
returnRedValue	The red component of the new RGBA value
returnGreenValue	The green component of the new RGBA value
returnBlueValue	The blue component of the new RGBA value
returnAlpha	The alpha component of the new RGBA value
Returns	True if the return values are valid otherwise false