Displays part of the image specified by SrcRect onto TCanvas to rectangle DstRect.
procedure DisplayImage(DstCanvas: TCanvas; const DstRect: TRect; Image: TBaseImage; const SrcRect: TRect); overload;
ImagingComponents (at line 326)
This procedure draws image without converting from Imaging format to TBitmap. Only [ifA8R8G8B8, ifX8R8G8B8] image formats are supported. Use this when you want displaying images that change frequently (because converting to TBitmap by ConvertImageDataToBitmap is generally slow).