#
|
# The Python Imaging Library.
|
# $Id$
|
#
|
# PCD file handling
|
#
|
# History:
|
# 96-05-10 fl Created
|
# 96-05-27 fl Added draft mode (128x192, 256x384)
|
#
|
# Copyright (c) Secret Labs AB 1997.
|
# Copyright (c) Fredrik Lundh 1996.
|
#
|
# See the README file for information on usage and redistribution.
|
#
|
|
|
__version__ = "0.1"
|
|
|
import Image, ImageFile
|
|
##
|
# Image plugin for PhotoCD images. This plugin only reads the 768x512
|
# image from the file; higher resolutions are encoded in a proprietary
|
# encoding.
|
|
class PcdImageFile(ImageFile.ImageFile):
|
|
format = "PCD"
|
format_description = "Kodak PhotoCD"
|
|
def _open(self):
|
|
# rough
|
self.fp.seek(2048)
|
s = self.fp.read(2048)
|
|
if s[:4] != "PCD_":
|
raise SyntaxError, "not a PCD file"
|
|
orientation = ord(s[1538]) & 3
|
if orientation == 1:
|
self.tile_post_rotate = 90 # hack
|
elif orientation == 3:
|
self.tile_post_rotate = -90
|
|
self.mode = "RGB"
|
self.size = 768, 512 # FIXME: not correct for rotated images!
|
self.tile = [("pcd", (0,0)+self.size, 96*2048, None)]
|
|
def draft(self, mode, size):
|
|
if len(self.tile) != 1:
|
return
|
|
d, e, o, a = self.tile[0]
|
|
if size:
|
scale = max(self.size[0] / size[0], self.size[1] / size[1])
|
for s, o in [(4,0*2048), (2,0*2048), (1,96*2048)]:
|
if scale >= s:
|
break
|
# e = e[0], e[1], (e[2]-e[0]+s-1)/s+e[0], (e[3]-e[1]+s-1)/s+e[1]
|
# self.size = ((self.size[0]+s-1)/s, (self.size[1]+s-1)/s)
|
|
self.tile = [(d, e, o, a)]
|
|
return self
|
|
#
|
# registry
|
|
Image.register_open("PCD", PcdImageFile)
|
|
Image.register_extension("PCD", ".pcd")
|
