126     def bpp(self) -> int:  member in ColorFormat
195 def bit_extend(value, bpp):  argument
204     bpp_now = bpp
207         bpp_now += bpp
218     bpp = cf.bpp
219     if bpp == 8:
221     elif bpp == 4:
233     elif bpp == 2:
243     elif bpp == 1:
253     elif bpp == 16:
262     elif bpp == 24:
293     elif bpp == 32:
424         return (self.w * self.cf.bpp + 7) // 8
460         self.blk_size = (cf.bpp + 7) // 8
806                                  bitdepth=self.cf.bpp)
820                                  bitdepth=self.cf.bpp,
885         if not 'palette' in metadata or not auto_cf and len(metadata['palette']) !=  2 ** cf.bpp:
923             for e in png.pack_rows(rows, cf.bpp):
941             shift = 8 - cf.bpp
942             mask = 2**cf.bpp - 1
944             for row in png.pack_rows(rows, cf.bpp):
1121         blksize = (self.cf.bpp + 7) // 8