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#
# The Python Imaging Library.
# $Id: FliImagePlugin.py 2134 2004-10-06 08:55:20Z fredrik $
#
# 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.
#
__version__ = "0.2"
import Image, ImageFile, ImagePalette
import string
def i16(c):
return ord(c[0]) + (ord(c[1])<<8)
def i32(c):
return ord(c[0]) + (ord(c[1])<<8) + (ord(c[2])<<16) + (ord(c[3])<<24)
#
# decoder
def _accept(prefix):
return 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"
def _open(self):
# HEAD
s = self.fp.read(128)
magic = i16(s[4:6])
if magic not in [0xAF11, 0xAF12]:
raise SyntaxError, "not an FLI/FLC file"
# 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 = map(lambda a: (a,a,a), 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 = map(lambda (r,g,b): chr(r)+chr(g)+chr(b), palette)
self.palette = ImagePalette.raw("RGB", string.join(palette, ""))
# set things up to decode first frame
self.frame = -1
self.__fp = self.fp
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 + ord(s[0])
n = ord(s[1])
if n == 0:
n = 256
s = self.fp.read(n * 3)
for n in range(0, len(s), 3):
r = ord(s[n]) << shift
g = ord(s[n+1]) << shift
b = ord(s[n+2]) << shift
palette[i] = (r, g, b)
i = i + 1
def seek(self, frame):
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 = self.__offset + framesize
def tell(self):
return self.frame
#
# registry
Image.register_open("FLI", FliImageFile, _accept)
Image.register_extension("FLI", ".fli")
Image.register_extension("FLI", ".flc")
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