This function can be used to copy a texture for the Cinema 4D content browser.

c4d_copy_preset_texture.py

def copy_preset_texture(source, dest):
  ''' Copies a bitmap file from the Cinema 4D preset library to the
  file specified by *dest*. The suffix of *source* is used to determine
  the output image format.

  Arguments:
    source: The source texture path that begins with `preset://`
    dest: The filename to save the texture to.
  Raises
    IOError: If *source* does not exist or could not be loaded.
    ValueError: If the file suffix of *source* does not match
      one of the supported image suffixes.
  '''

  lower = source.lower()
  if lower.endswith('.tif') or lower.endswith('.tiff'):
    format = c4d.FILTER_TIF
  elif lower.endswith('.tga'):
    format = c4d.FILTER_TGA
  elif lower.endswith('.bmp'):
    format = c4d.FILTER_BMP
  elif lower.endswith('.iff'):
    format = c4d.FILTER_IFF
  elif lower.endswith('.jpg'):
    format = c4d.FILTER_JPG
  elif lower.endswith('.pict'):
    format = c4d.FILTER_PICT
  elif lower.endswith('.psd'):
    format = c4d.FILTER_PSD
  elif lower.endswith('.rla'):
    format = c4d.FILTER_RLA
  elif lower.endswith('.rpf'):
    format = c4d.FILTER_RPF
  elif lower.endswith('.b3d'):
    format = c4d.FILTER_B3D
  # elif lower.endswith('.'):
  #     format = c4d.FILTER_TIF_B3D
  elif lower.endswith('.psb'):
    format = c4d.FILTER_PSB
  elif lower.endswith('.avi'):
    format = c4d.FILTER_AVI
  elif lower.endswith('.mov'):
    format = c4d.FILTER_MOVIE
  #elif lower.endswith('.'):
  #    format = c4d.FILTER_QTVRSAVER_PANORAMA
  #elif lower.endswith('.'):
  #    format = c4d.FILTER_QTVRSAVER_OBJECT
  elif lower.endswith('.hdr'):
    format = c4d.FILTER_HDR
  #elif lower.endswith('.'):
  #    format = c4d.FILTER_EXR_LOAD
  elif lower.endswith('.exr'):
    format = c4d.FILTER_EXR
  elif lower.endswith('.png'):
    format = c4d.FILTER_PNG
  elif lower.endswith('.ies'):
    format = c4d.FILTER_IES
  elif lower.endswith('.dpx'):
    format = c4d.FILTER_DPX
  else:
    raise ValueError('can not determine image format of <source>', source)

  bmp = c4d.bitmaps.BaseBitmap()
  result = bmp.InitWith(source)[0]
  if result != c4d.IMAGERESULT_OK:
    raise IOError('<source> image could not be loaded', source)

  flags = c4d.SAVEBIT_ALPHA | c4d.SAVEBIT_MULTILAYER
  result = bmp.Save(dest, format, None, flags)
  if result == c4d.IMAGERESULT_FILEERROR:
    raise IOError('could not save to image', dest)
  elif result != c4d.IMAGERESULT_OK:
    raise IOError('unknown error while saving', dest)

A quick fix for the R17 (I don't really know when BaseBitmap.Save)

result = bmp.Save(dest, format, savebits=flags)

Seems like this parameter was already added in R14! I'll update the code.

Also fixed IMAGERESULT_FILEERROR spelling error.