function RenderPageByIndex(PageNumber, Width, Height: Integer; Rotation: TRotation = ro0; Options: TRenderOptions = []; Color: TColor = clWhite): TBitmap;
procedure RenderPageByIndex(Bitmap: TBitmap; PageNumber, Width, Height: Integer; Rotation: TRotation = ro0; Options: TRenderOptions = []; Color: TColor = clWhite);
The method reuses a bounded parsed PDFium page scene when the requested page is not the current editing page
Repeated renders of the same page at different pixel sizes avoid reopening and reparsing the page while preserving PageNumber and page-change events
The bitmap-returning overload transfers ownership of the returned TBitmap to the caller
Bmp := Pdf1.RenderPageByIndex(12, 1600, 2200);
try
Image1.Picture.Assign(Bmp);
finally
Bmp.Free;
end;