#
# The Python Imaging Library.
# $Id: XVThumbImagePlugin.py 2134 2004-10-06 08:55:20Z fredrik $
#
# XV Thumbnail file handler by Charles E. "Gene" Cash
# (gcash@magicnet.net)
#
# see xvcolor.c and xvbrowse.c in the sources to John Bradley's XV,
# available from ftp://ftp.cis.upenn.edu/pub/xv/
#
# history:
# 98-08-15 cec created (b/w only)
# 98-12-09 cec added color palette
# 98-12-28 fl added to PIL (with only a few very minor modifications)
#
# To do:
# FIXME: make save work (this requires quantization support)
#
__version__ = "0.1"
import string
import Image, ImageFile, ImagePalette
# standard color palette for thumbnails (RGB332)
PALETTE = ""
for r in range(8):
for g in range(8):
for b in range(4):
PALETTE = PALETTE + (chr((r*255)/7)+chr((g*255)/7)+chr((b*255)/3))
##
# Image plugin for XV thumbnail images.
class XVThumbImageFile(ImageFile.ImageFile):
format = "XVThumb"
format_description = "XV thumbnail image"
def _open(self):
# check magic
s = self.fp.read(6)
if s != "P7 332":
raise SyntaxError, "not an XV thumbnail file"
# Skip to beginning of next line
self.fp.readline()
# skip info comments
while 1:
s = self.fp.readline()
if not s:
raise SyntaxError, "Unexpected EOF reading XV thumbnail file"
if s[0] != '#':
break
# parse header line (already read)
s = string.split(s.strip())
self.mode = "P"
self.size = int(s[0]), int(s[1])
self.palette = ImagePalette.raw("RGB", PALETTE)
self.tile = [
("raw", (0, 0)+self.size,
self.fp.tell(), (self.mode, 0, 1)
)]
# --------------------------------------------------------------------
Image.register_open("XVThumb", XVThumbImageFile)
