SOLVED BaseBitmap.ScaleIt() IS NOT WORKING

Hello! plugincafe!
I want to save all material's preview image.
And i try to use BaseBitmap.ScaleIt() , but it's not working.
All images remain the before ScaleIt() size,I'm not sure what went wrong.
there are my code:

import c4d


def SetBmpSize(mats,size):
    bmps = []
    for m in mats:
        image = m.GetPreview(0)

        dst_bmp = c4d.bitmaps.BaseBitmap()
        dst_bmp.Init(size, size)
        
        image.ScaleIt(dst_bmp, 256, True, True)

        bmps.append(image)
    return bmps

def main():
    path = "D:\\Program Files\\my folder"
    
    mats = doc.GetMaterials()
    
    bmps = SetBmpSize(mats,32)
    for index,bmp in enumerate(bmps):
        c4d.bitmaps.ShowBitmap(bmp)
        #name = path + "\\" + str(index) + "material preview.tif"
        #bmp.Save(name, c4d.FILTER_TIF, data=None, savebits=c4d.SAVEBIT_0)
    

if __name__=='__main__':
    main()

this is the show in picture viewer after ScaleIt() Image:
Snipaste_2020-02-17_04-07-47.png

@gheyret said in BaseBitmap.ScaleIt() IS NOT WORKING:

bmps.append(image)

This does append the original image to your array of bmps being returned, not the scaled up one.
you should do:

bmps.append(dst.bmp)

@C4DS
Thank you for your help! It works!
Cheers~