function GetSampleInt(X, Y: Integer): TColor32; override;
function GetSampleFixed(X, Y: TFixed): TColor32; override;
Collects samples from the area defined by the kernel and invokes the UpdateBuffer for each new sample. When all samples have been processed, the buffer is converted into the TColor32 format using the protected ConvertBuffer method.
See TCustomSampler.GetSample for further details.