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- #
- # The Python Imaging Library.
- # $Id$
- #
- # FLI/FLC file handling.
- #
- # History:
- # 95-09-01 fl Created
- # 97-01-03 fl Fixed parser, setup decoder tile
- # 98-07-15 fl Renamed offset attribute to avoid name clash
- #
- # Copyright (c) Secret Labs AB 1997-98.
- # Copyright (c) Fredrik Lundh 1995-97.
- #
- # See the README file for information on usage and redistribution.
- #
-
-
- from . import Image, ImageFile, ImagePalette
- from ._binary import i8, i16le as i16, i32le as i32, o8
-
- __version__ = "0.2"
-
-
- #
- # decoder
-
- def _accept(prefix):
- return len(prefix) >= 6 and i16(prefix[4:6]) in [0xAF11, 0xAF12]
-
-
- ##
- # Image plugin for the FLI/FLC animation format. Use the <b>seek</b>
- # method to load individual frames.
-
- class FliImageFile(ImageFile.ImageFile):
-
- format = "FLI"
- format_description = "Autodesk FLI/FLC Animation"
- _close_exclusive_fp_after_loading = False
-
- def _open(self):
-
- # HEAD
- s = self.fp.read(128)
- magic = i16(s[4:6])
- if not (magic in [0xAF11, 0xAF12] and
- i16(s[14:16]) in [0, 3] and # flags
- s[20:22] == b"\x00\x00"): # reserved
- raise SyntaxError("not an FLI/FLC file")
-
- # frames
- self.__framecount = i16(s[6:8])
-
- # image characteristics
- self.mode = "P"
- self._size = i16(s[8:10]), i16(s[10:12])
-
- # animation speed
- duration = i32(s[16:20])
- if magic == 0xAF11:
- duration = (duration * 1000) // 70
- self.info["duration"] = duration
-
- # look for palette
- palette = [(a, a, a) for a in range(256)]
-
- s = self.fp.read(16)
-
- self.__offset = 128
-
- if i16(s[4:6]) == 0xF100:
- # prefix chunk; ignore it
- self.__offset = self.__offset + i32(s)
- s = self.fp.read(16)
-
- if i16(s[4:6]) == 0xF1FA:
- # look for palette chunk
- s = self.fp.read(6)
- if i16(s[4:6]) == 11:
- self._palette(palette, 2)
- elif i16(s[4:6]) == 4:
- self._palette(palette, 0)
-
- palette = [o8(r)+o8(g)+o8(b) for (r, g, b) in palette]
- self.palette = ImagePalette.raw("RGB", b"".join(palette))
-
- # set things up to decode first frame
- self.__frame = -1
- self.__fp = self.fp
- self.__rewind = self.fp.tell()
- self.seek(0)
-
- def _palette(self, palette, shift):
- # load palette
-
- i = 0
- for e in range(i16(self.fp.read(2))):
- s = self.fp.read(2)
- i = i + i8(s[0])
- n = i8(s[1])
- if n == 0:
- n = 256
- s = self.fp.read(n * 3)
- for n in range(0, len(s), 3):
- r = i8(s[n]) << shift
- g = i8(s[n+1]) << shift
- b = i8(s[n+2]) << shift
- palette[i] = (r, g, b)
- i += 1
-
- @property
- def n_frames(self):
- return self.__framecount
-
- @property
- def is_animated(self):
- return self.__framecount > 1
-
- def seek(self, frame):
- if not self._seek_check(frame):
- return
- if frame < self.__frame:
- self._seek(0)
-
- for f in range(self.__frame + 1, frame + 1):
- self._seek(f)
-
- def _seek(self, frame):
- if frame == 0:
- self.__frame = -1
- self.__fp.seek(self.__rewind)
- self.__offset = 128
-
- if frame != self.__frame + 1:
- raise ValueError("cannot seek to frame %d" % frame)
- self.__frame = frame
-
- # move to next frame
- self.fp = self.__fp
- self.fp.seek(self.__offset)
-
- s = self.fp.read(4)
- if not s:
- raise EOFError
-
- framesize = i32(s)
-
- self.decodermaxblock = framesize
- self.tile = [("fli", (0, 0)+self.size, self.__offset, None)]
-
- self.__offset += framesize
-
- def tell(self):
- return self.__frame
-
-
- #
- # registry
-
- Image.register_open(FliImageFile.format, FliImageFile, _accept)
-
- Image.register_extensions(FliImageFile.format, [".fli", ".flc"])
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