QgsBrightnessContrastFilter class

Brightness/contrast filter pipe for rasters.

Base classes

class QgsRasterInterface: Base class for processing filters like renderers, reprojector, resampler etc.

auto bandCount() const -> int override: Gets number of bands.
auto block(int bandNo, const QgsRectangle& extent, int width, int height, QgsRasterBlockFeedback* feedback = nullptr) -> QgsRasterBlock* override: Read block of data using given extent and size.
auto clone() const -> QgsBrightnessContrastFilter* override: Clone itself, create deep copy.
auto dataType(int bandNo) const -> Qgis::DataType override: Returns data type for the band specified by number.
void readXml(const QDomElement& filterElem) override: Sets base class members from xml. Usually called from create() methods of subclasses.
auto setInput(QgsRasterInterface* input) -> bool override: Set input.
void writeXml(QDomDocument& doc, QDomElement& parentElem) const override: Write base class members to xml.

Read block of data using given extent and size.

Parameters
bandNo	band number
extent	extent of block
width	pixel width of block
height	pixel height of block
feedback	optional raster feedback object for cancelation/preview. Added in QGIS 3.0.

Returns pointer to data. Caller is responsible to free the memory returned.

Set input.

Returns true if set correctly, false if cannot use that input