QgsSingleBandColorDataRenderer class

Raster renderer pipe for single band color.

Base classes

class QgsRasterRenderer: Raster renderer pipe that applies colors to a raster.

QgsSingleBandColorDataRenderer(const QgsSingleBandColorDataRenderer&) deleted: QgsSingleBandColorDataRenderer cannot be copied. Use clone() instead.

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 -> QgsSingleBandColorDataRenderer* override: Clone itself, create deep copy.
auto operator=(const QgsSingleBandColorDataRenderer&) -> const QgsSingleBandColorDataRenderer& deleted: QgsSingleBandColorDataRenderer cannot be copied. Use clone() instead.
auto setInput(QgsRasterInterface* input) -> bool override: Set input.
auto usesBands() const -> QList<int> override: Returns a list of band numbers used by the renderer.
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