Graphic class which uses Imaging to load images.
public TImagingGraphic = class(TBitmap);
ImagingComponents (at line 76)
It has standard TBitmap class as ancestor and it can Assign also to/from TImageData structres and TBaseImage classes. For saving is uses inherited TBitmap methods. This class is automatically registered to TPicture for all file extensions supported by Imaging (useful only for loading). If you just want to load images in various formats you can use this class or simply use TPicture.LoadFromXXX which will create this class automatically. For TGraphic class that saves with Imaging look at TImagingGraphicForSave class.
TBitmap TImagingGraphic TImagingGraphicForSave