Downsampling without antialiasing

[Eager]

Hi all,
I've currently having trouble getting BGRABitmap to resize my image without antialiasing. I have several images of humans than I need to reduce only by a few pixels; if I use Paint.net with "nearest neighbor" interpolation the resized images are crisp and the borders around the figures are deep black.

I haven't been able to find a way to replicate this behavior with BGRABitmap. Even the simplest filter -rmSimpleStretch- adds antialiased/blended borders; looking at the commented code it says it transforms pixels into boxes "with antialiasing between boxes", so maybe this is the reason?

Currently I'm CopyRect'ing each image into a smaller TRect using regular TCanvas methods; as I'm working with a sheet of several hundreds of images this takes a long time. By comparison BGRABitmap's methods are blazingly fast.

Is there any way to disable antialiasing completely and getting a "nearest neighbor" equivalent with BGRABitmap?
Thanks in advance!

[domasz]

Canvas.StretchDraw ?

https://forum.lazarus.freepascal.org/index.php/topic,67389.msg518589.html#msg518589

[Eager]

Canvas.StretchDraw ?

https://forum.lazarus.freepascal.org/index.php/topic,67389.msg518589.html#msg518589

Oh my. Can't believe it was that simple. 
I guess I was determined to make it work using the BGRA library... should have asked here earlier. Thank you!!

[circular]

Ah indeed, simple stretch is already kind of antialiased. It could be worth having a "simple stretch without antialising" option. However, indeed, TCanvas stretch draw will do that for you.